svm.c 182.2 KB
Newer Older
A
Avi Kivity 已提交
1 2 3 4 5 6
/*
 * Kernel-based Virtual Machine driver for Linux
 *
 * AMD SVM support
 *
 * Copyright (C) 2006 Qumranet, Inc.
N
Nicolas Kaiser 已提交
7
 * Copyright 2010 Red Hat, Inc. and/or its affiliates.
A
Avi Kivity 已提交
8 9 10 11 12 13 14 15 16
 *
 * Authors:
 *   Yaniv Kamay  <yaniv@qumranet.com>
 *   Avi Kivity   <avi@qumranet.com>
 *
 * This work is licensed under the terms of the GNU GPL, version 2.  See
 * the COPYING file in the top-level directory.
 *
 */
17 18 19

#define pr_fmt(fmt) "SVM: " fmt

20 21
#include <linux/kvm_host.h>

22
#include "irq.h"
23
#include "mmu.h"
24
#include "kvm_cache_regs.h"
25
#include "x86.h"
26
#include "cpuid.h"
27
#include "pmu.h"
A
Avi Kivity 已提交
28

A
Avi Kivity 已提交
29
#include <linux/module.h>
30
#include <linux/mod_devicetable.h>
31
#include <linux/kernel.h>
A
Avi Kivity 已提交
32 33
#include <linux/vmalloc.h>
#include <linux/highmem.h>
A
Alexey Dobriyan 已提交
34
#include <linux/sched.h>
35
#include <linux/trace_events.h>
36
#include <linux/slab.h>
37 38
#include <linux/amd-iommu.h>
#include <linux/hashtable.h>
39
#include <linux/frame.h>
B
Brijesh Singh 已提交
40
#include <linux/psp-sev.h>
B
Brijesh Singh 已提交
41
#include <linux/file.h>
42 43
#include <linux/pagemap.h>
#include <linux/swap.h>
A
Avi Kivity 已提交
44

45
#include <asm/apic.h>
46
#include <asm/perf_event.h>
47
#include <asm/tlbflush.h>
A
Avi Kivity 已提交
48
#include <asm/desc.h>
49
#include <asm/debugreg.h>
G
Gleb Natapov 已提交
50
#include <asm/kvm_para.h>
51
#include <asm/irq_remapping.h>
52
#include <asm/spec-ctrl.h>
A
Avi Kivity 已提交
53

54
#include <asm/virtext.h>
55
#include "trace.h"
56

57 58
#define __ex(x) __kvm_handle_fault_on_reboot(x)

A
Avi Kivity 已提交
59 60 61
MODULE_AUTHOR("Qumranet");
MODULE_LICENSE("GPL");

62 63 64 65 66 67
static const struct x86_cpu_id svm_cpu_id[] = {
	X86_FEATURE_MATCH(X86_FEATURE_SVM),
	{}
};
MODULE_DEVICE_TABLE(x86cpu, svm_cpu_id);

A
Avi Kivity 已提交
68 69 70 71 72 73
#define IOPM_ALLOC_ORDER 2
#define MSRPM_ALLOC_ORDER 1

#define SEG_TYPE_LDT 2
#define SEG_TYPE_BUSY_TSS16 3

74 75 76 77
#define SVM_FEATURE_NPT            (1 <<  0)
#define SVM_FEATURE_LBRV           (1 <<  1)
#define SVM_FEATURE_SVML           (1 <<  2)
#define SVM_FEATURE_NRIP           (1 <<  3)
78 79 80 81
#define SVM_FEATURE_TSC_RATE       (1 <<  4)
#define SVM_FEATURE_VMCB_CLEAN     (1 <<  5)
#define SVM_FEATURE_FLUSH_ASID     (1 <<  6)
#define SVM_FEATURE_DECODE_ASSIST  (1 <<  7)
82
#define SVM_FEATURE_PAUSE_FILTER   (1 << 10)
83

84 85
#define SVM_AVIC_DOORBELL	0xc001011b

86 87 88 89
#define NESTED_EXIT_HOST	0	/* Exit handled on host level */
#define NESTED_EXIT_DONE	1	/* Exit caused nested vmexit  */
#define NESTED_EXIT_CONTINUE	2	/* Further checks needed      */

90 91
#define DEBUGCTL_RESERVED_BITS (~(0x3fULL))

92
#define TSC_RATIO_RSVD          0xffffff0000000000ULL
93 94
#define TSC_RATIO_MIN		0x0000000000000001ULL
#define TSC_RATIO_MAX		0x000000ffffffffffULL
95

D
Dan Carpenter 已提交
96
#define AVIC_HPA_MASK	~((0xFFFULL << 52) | 0xFFF)
97 98 99 100 101 102 103

/*
 * 0xff is broadcast, so the max index allowed for physical APIC ID
 * table is 0xfe.  APIC IDs above 0xff are reserved.
 */
#define AVIC_MAX_PHYSICAL_ID_COUNT	255

104 105 106 107
#define AVIC_UNACCEL_ACCESS_WRITE_MASK		1
#define AVIC_UNACCEL_ACCESS_OFFSET_MASK		0xFF0
#define AVIC_UNACCEL_ACCESS_VECTOR_MASK		0xFFFFFFFF

108 109 110 111 112 113 114 115 116 117 118 119 120
/* AVIC GATAG is encoded using VM and VCPU IDs */
#define AVIC_VCPU_ID_BITS		8
#define AVIC_VCPU_ID_MASK		((1 << AVIC_VCPU_ID_BITS) - 1)

#define AVIC_VM_ID_BITS			24
#define AVIC_VM_ID_NR			(1 << AVIC_VM_ID_BITS)
#define AVIC_VM_ID_MASK			((1 << AVIC_VM_ID_BITS) - 1)

#define AVIC_GATAG(x, y)		(((x & AVIC_VM_ID_MASK) << AVIC_VCPU_ID_BITS) | \
						(y & AVIC_VCPU_ID_MASK))
#define AVIC_GATAG_TO_VMID(x)		((x >> AVIC_VCPU_ID_BITS) & AVIC_VM_ID_MASK)
#define AVIC_GATAG_TO_VCPUID(x)		(x & AVIC_VCPU_ID_MASK)

121 122
static bool erratum_383_found __read_mostly;

A
Avi Kivity 已提交
123 124 125 126 127 128
static const u32 host_save_user_msrs[] = {
#ifdef CONFIG_X86_64
	MSR_STAR, MSR_LSTAR, MSR_CSTAR, MSR_SYSCALL_MASK, MSR_KERNEL_GS_BASE,
	MSR_FS_BASE,
#endif
	MSR_IA32_SYSENTER_CS, MSR_IA32_SYSENTER_ESP, MSR_IA32_SYSENTER_EIP,
P
Paolo Bonzini 已提交
129
	MSR_TSC_AUX,
A
Avi Kivity 已提交
130 131 132 133
};

#define NR_HOST_SAVE_USER_MSRS ARRAY_SIZE(host_save_user_msrs)

134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155
struct kvm_sev_info {
	bool active;		/* SEV enabled guest */
	unsigned int asid;	/* ASID used for this guest */
	unsigned int handle;	/* SEV firmware handle */
	int fd;			/* SEV device fd */
	unsigned long pages_locked; /* Number of pages locked */
	struct list_head regions_list;  /* List of registered regions */
};

struct kvm_svm {
	struct kvm kvm;

	/* Struct members for AVIC */
	u32 avic_vm_id;
	u32 ldr_mode;
	struct page *avic_logical_id_table_page;
	struct page *avic_physical_id_table_page;
	struct hlist_node hnode;

	struct kvm_sev_info sev_info;
};

A
Avi Kivity 已提交
156 157
struct kvm_vcpu;

158 159 160
struct nested_state {
	struct vmcb *hsave;
	u64 hsave_msr;
161
	u64 vm_cr_msr;
162 163 164 165 166 167 168
	u64 vmcb;

	/* These are the merged vectors */
	u32 *msrpm;

	/* gpa pointers to the real vectors */
	u64 vmcb_msrpm;
169
	u64 vmcb_iopm;
J
Joerg Roedel 已提交
170

171 172 173
	/* A VMEXIT is required but not yet emulated */
	bool exit_required;

J
Joerg Roedel 已提交
174
	/* cache for intercepts of the guest */
175
	u32 intercept_cr;
176
	u32 intercept_dr;
J
Joerg Roedel 已提交
177 178 179
	u32 intercept_exceptions;
	u64 intercept;

180 181
	/* Nested Paging related state */
	u64 nested_cr3;
182 183
};

184 185 186
#define MSRPM_OFFSETS	16
static u32 msrpm_offsets[MSRPM_OFFSETS] __read_mostly;

187 188 189 190 191 192
/*
 * Set osvw_len to higher value when updated Revision Guides
 * are published and we know what the new status bits are
 */
static uint64_t osvw_len = 4, osvw_status;

A
Avi Kivity 已提交
193 194 195 196 197 198 199 200
struct vcpu_svm {
	struct kvm_vcpu vcpu;
	struct vmcb *vmcb;
	unsigned long vmcb_pa;
	struct svm_cpu_data *svm_data;
	uint64_t asid_generation;
	uint64_t sysenter_esp;
	uint64_t sysenter_eip;
P
Paolo Bonzini 已提交
201
	uint64_t tsc_aux;
A
Avi Kivity 已提交
202

203 204
	u64 msr_decfg;

A
Avi Kivity 已提交
205 206 207
	u64 next_rip;

	u64 host_user_msrs[NR_HOST_SAVE_USER_MSRS];
208
	struct {
209 210 211
		u16 fs;
		u16 gs;
		u16 ldt;
212 213
		u64 gs_base;
	} host;
A
Avi Kivity 已提交
214

215
	u64 spec_ctrl;
216 217 218 219 220 221
	/*
	 * Contains guest-controlled bits of VIRT_SPEC_CTRL, which will be
	 * translated into the appropriate L2_CFG bits on the host to
	 * perform speculative control.
	 */
	u64 virt_spec_ctrl;
222

A
Avi Kivity 已提交
223 224
	u32 *msrpm;

225 226
	ulong nmi_iret_rip;

227
	struct nested_state nested;
J
Jan Kiszka 已提交
228 229

	bool nmi_singlestep;
230
	u64 nmi_singlestep_guest_rflags;
231 232 233

	unsigned int3_injected;
	unsigned long int3_rip;
234

235 236
	/* cached guest cpuid flags for faster access */
	bool nrips_enabled	: 1;
237

238
	u32 ldr_reg;
239 240
	struct page *avic_backing_page;
	u64 *avic_physical_id_cache;
241
	bool avic_is_running;
242 243 244 245 246 247 248 249 250

	/*
	 * Per-vcpu list of struct amd_svm_iommu_ir:
	 * This is used mainly to store interrupt remapping information used
	 * when update the vcpu affinity. This avoids the need to scan for
	 * IRTE and try to match ga_tag in the IOMMU driver.
	 */
	struct list_head ir_list;
	spinlock_t ir_list_lock;
251 252 253

	/* which host CPU was used for running this vcpu */
	unsigned int last_cpu;
254 255 256 257 258 259 260 261
};

/*
 * This is a wrapper of struct amd_iommu_ir_data.
 */
struct amd_svm_iommu_ir {
	struct list_head node;	/* Used by SVM for per-vcpu ir_list */
	void *data;		/* Storing pointer to struct amd_ir_data */
A
Avi Kivity 已提交
262 263
};

264 265 266 267 268 269 270 271
#define AVIC_LOGICAL_ID_ENTRY_GUEST_PHYSICAL_ID_MASK	(0xFF)
#define AVIC_LOGICAL_ID_ENTRY_VALID_MASK		(1 << 31)

#define AVIC_PHYSICAL_ID_ENTRY_HOST_PHYSICAL_ID_MASK	(0xFFULL)
#define AVIC_PHYSICAL_ID_ENTRY_BACKING_PAGE_MASK	(0xFFFFFFFFFFULL << 12)
#define AVIC_PHYSICAL_ID_ENTRY_IS_RUNNING_MASK		(1ULL << 62)
#define AVIC_PHYSICAL_ID_ENTRY_VALID_MASK		(1ULL << 63)

272 273 274
static DEFINE_PER_CPU(u64, current_tsc_ratio);
#define TSC_RATIO_DEFAULT	0x0100000000ULL

275 276
#define MSR_INVALID			0xffffffffU

277
static const struct svm_direct_access_msrs {
278 279 280
	u32 index;   /* Index of the MSR */
	bool always; /* True if intercept is always on */
} direct_access_msrs[] = {
B
Brian Gerst 已提交
281
	{ .index = MSR_STAR,				.always = true  },
282 283 284 285 286 287 288 289 290
	{ .index = MSR_IA32_SYSENTER_CS,		.always = true  },
#ifdef CONFIG_X86_64
	{ .index = MSR_GS_BASE,				.always = true  },
	{ .index = MSR_FS_BASE,				.always = true  },
	{ .index = MSR_KERNEL_GS_BASE,			.always = true  },
	{ .index = MSR_LSTAR,				.always = true  },
	{ .index = MSR_CSTAR,				.always = true  },
	{ .index = MSR_SYSCALL_MASK,			.always = true  },
#endif
291
	{ .index = MSR_IA32_SPEC_CTRL,			.always = false },
A
Ashok Raj 已提交
292
	{ .index = MSR_IA32_PRED_CMD,			.always = false },
293 294 295 296 297
	{ .index = MSR_IA32_LASTBRANCHFROMIP,		.always = false },
	{ .index = MSR_IA32_LASTBRANCHTOIP,		.always = false },
	{ .index = MSR_IA32_LASTINTFROMIP,		.always = false },
	{ .index = MSR_IA32_LASTINTTOIP,		.always = false },
	{ .index = MSR_INVALID,				.always = false },
A
Avi Kivity 已提交
298 299
};

300 301 302 303
/* enable NPT for AMD64 and X86 with PAE */
#if defined(CONFIG_X86_64) || defined(CONFIG_X86_PAE)
static bool npt_enabled = true;
#else
J
Joerg Roedel 已提交
304
static bool npt_enabled;
305
#endif
306

307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354
/*
 * These 2 parameters are used to config the controls for Pause-Loop Exiting:
 * pause_filter_count: On processors that support Pause filtering(indicated
 *	by CPUID Fn8000_000A_EDX), the VMCB provides a 16 bit pause filter
 *	count value. On VMRUN this value is loaded into an internal counter.
 *	Each time a pause instruction is executed, this counter is decremented
 *	until it reaches zero at which time a #VMEXIT is generated if pause
 *	intercept is enabled. Refer to  AMD APM Vol 2 Section 15.14.4 Pause
 *	Intercept Filtering for more details.
 *	This also indicate if ple logic enabled.
 *
 * pause_filter_thresh: In addition, some processor families support advanced
 *	pause filtering (indicated by CPUID Fn8000_000A_EDX) upper bound on
 *	the amount of time a guest is allowed to execute in a pause loop.
 *	In this mode, a 16-bit pause filter threshold field is added in the
 *	VMCB. The threshold value is a cycle count that is used to reset the
 *	pause counter. As with simple pause filtering, VMRUN loads the pause
 *	count value from VMCB into an internal counter. Then, on each pause
 *	instruction the hardware checks the elapsed number of cycles since
 *	the most recent pause instruction against the pause filter threshold.
 *	If the elapsed cycle count is greater than the pause filter threshold,
 *	then the internal pause count is reloaded from the VMCB and execution
 *	continues. If the elapsed cycle count is less than the pause filter
 *	threshold, then the internal pause count is decremented. If the count
 *	value is less than zero and PAUSE intercept is enabled, a #VMEXIT is
 *	triggered. If advanced pause filtering is supported and pause filter
 *	threshold field is set to zero, the filter will operate in the simpler,
 *	count only mode.
 */

static unsigned short pause_filter_thresh = KVM_DEFAULT_PLE_GAP;
module_param(pause_filter_thresh, ushort, 0444);

static unsigned short pause_filter_count = KVM_SVM_DEFAULT_PLE_WINDOW;
module_param(pause_filter_count, ushort, 0444);

/* Default doubles per-vcpu window every exit. */
static unsigned short pause_filter_count_grow = KVM_DEFAULT_PLE_WINDOW_GROW;
module_param(pause_filter_count_grow, ushort, 0444);

/* Default resets per-vcpu window every exit to pause_filter_count. */
static unsigned short pause_filter_count_shrink = KVM_DEFAULT_PLE_WINDOW_SHRINK;
module_param(pause_filter_count_shrink, ushort, 0444);

/* Default is to compute the maximum so we can never overflow. */
static unsigned short pause_filter_count_max = KVM_SVM_DEFAULT_PLE_WINDOW_MAX;
module_param(pause_filter_count_max, ushort, 0444);

355 356
/* allow nested paging (virtualized MMU) for all guests */
static int npt = true;
357
module_param(npt, int, S_IRUGO);
358

359 360
/* allow nested virtualization in KVM/SVM */
static int nested = true;
361 362
module_param(nested, int, S_IRUGO);

363 364
/* enable / disable AVIC */
static int avic;
365
#ifdef CONFIG_X86_LOCAL_APIC
366
module_param(avic, int, S_IRUGO);
367
#endif
368

369 370 371 372
/* enable/disable Virtual VMLOAD VMSAVE */
static int vls = true;
module_param(vls, int, 0444);

373 374 375
/* enable/disable Virtual GIF */
static int vgif = true;
module_param(vgif, int, 0444);
376

B
Brijesh Singh 已提交
377 378 379 380
/* enable/disable SEV support */
static int sev = IS_ENABLED(CONFIG_AMD_MEM_ENCRYPT_ACTIVE_BY_DEFAULT);
module_param(sev, int, 0444);

B
Brijesh Singh 已提交
381 382
static u8 rsm_ins_bytes[] = "\x0f\xaa";

383
static void svm_set_cr0(struct kvm_vcpu *vcpu, unsigned long cr0);
384
static void svm_flush_tlb(struct kvm_vcpu *vcpu, bool invalidate_gpa);
385
static void svm_complete_interrupts(struct vcpu_svm *svm);
386

387
static int nested_svm_exit_handled(struct vcpu_svm *svm);
388
static int nested_svm_intercept(struct vcpu_svm *svm);
389 390 391 392
static int nested_svm_vmexit(struct vcpu_svm *svm);
static int nested_svm_check_exception(struct vcpu_svm *svm, unsigned nr,
				      bool has_error_code, u32 error_code);

393
enum {
394 395
	VMCB_INTERCEPTS, /* Intercept vectors, TSC offset,
			    pause filter count */
396
	VMCB_PERM_MAP,   /* IOPM Base and MSRPM Base */
397
	VMCB_ASID,	 /* ASID */
398
	VMCB_INTR,	 /* int_ctl, int_vector */
399
	VMCB_NPT,        /* npt_en, nCR3, gPAT */
400
	VMCB_CR,	 /* CR0, CR3, CR4, EFER */
401
	VMCB_DR,         /* DR6, DR7 */
402
	VMCB_DT,         /* GDT, IDT */
403
	VMCB_SEG,        /* CS, DS, SS, ES, CPL */
404
	VMCB_CR2,        /* CR2 only */
405
	VMCB_LBR,        /* DBGCTL, BR_FROM, BR_TO, LAST_EX_FROM, LAST_EX_TO */
406 407 408 409
	VMCB_AVIC,       /* AVIC APIC_BAR, AVIC APIC_BACKING_PAGE,
			  * AVIC PHYSICAL_TABLE pointer,
			  * AVIC LOGICAL_TABLE pointer
			  */
410 411 412
	VMCB_DIRTY_MAX,
};

413 414
/* TPR and CR2 are always written before VMRUN */
#define VMCB_ALWAYS_DIRTY_MASK	((1U << VMCB_INTR) | (1U << VMCB_CR2))
415

416 417
#define VMCB_AVIC_APIC_BAR_MASK		0xFFFFFFFFFF000ULL

418
static unsigned int max_sev_asid;
B
Brijesh Singh 已提交
419 420
static unsigned int min_sev_asid;
static unsigned long *sev_asid_bitmap;
421
#define __sme_page_pa(x) __sme_set(page_to_pfn(x) << PAGE_SHIFT)
B
Brijesh Singh 已提交
422

423 424 425 426 427 428 429 430
struct enc_region {
	struct list_head list;
	unsigned long npages;
	struct page **pages;
	unsigned long uaddr;
	unsigned long size;
};

431 432 433 434 435 436

static inline struct kvm_svm *to_kvm_svm(struct kvm *kvm)
{
	return container_of(kvm, struct kvm_svm, kvm);
}

B
Brijesh Singh 已提交
437 438 439 440 441 442 443
static inline bool svm_sev_enabled(void)
{
	return max_sev_asid;
}

static inline bool sev_guest(struct kvm *kvm)
{
444
	struct kvm_sev_info *sev = &to_kvm_svm(kvm)->sev_info;
B
Brijesh Singh 已提交
445 446 447

	return sev->active;
}
448

449 450
static inline int sev_get_asid(struct kvm *kvm)
{
451
	struct kvm_sev_info *sev = &to_kvm_svm(kvm)->sev_info;
452 453 454 455

	return sev->asid;
}

456 457 458 459 460 461 462 463 464 465 466 467 468 469 470 471
static inline void mark_all_dirty(struct vmcb *vmcb)
{
	vmcb->control.clean = 0;
}

static inline void mark_all_clean(struct vmcb *vmcb)
{
	vmcb->control.clean = ((1 << VMCB_DIRTY_MAX) - 1)
			       & ~VMCB_ALWAYS_DIRTY_MASK;
}

static inline void mark_dirty(struct vmcb *vmcb, int bit)
{
	vmcb->control.clean &= ~(1 << bit);
}

472 473
static inline struct vcpu_svm *to_svm(struct kvm_vcpu *vcpu)
{
R
Rusty Russell 已提交
474
	return container_of(vcpu, struct vcpu_svm, vcpu);
475 476
}

477 478 479 480 481 482
static inline void avic_update_vapic_bar(struct vcpu_svm *svm, u64 data)
{
	svm->vmcb->control.avic_vapic_bar = data & VMCB_AVIC_APIC_BAR_MASK;
	mark_dirty(svm->vmcb, VMCB_AVIC);
}

483 484 485 486 487 488 489 490 491 492 493
static inline bool avic_vcpu_is_running(struct kvm_vcpu *vcpu)
{
	struct vcpu_svm *svm = to_svm(vcpu);
	u64 *entry = svm->avic_physical_id_cache;

	if (!entry)
		return false;

	return (READ_ONCE(*entry) & AVIC_PHYSICAL_ID_ENTRY_IS_RUNNING_MASK);
}

494 495 496 497 498
static void recalc_intercepts(struct vcpu_svm *svm)
{
	struct vmcb_control_area *c, *h;
	struct nested_state *g;

499 500
	mark_dirty(svm->vmcb, VMCB_INTERCEPTS);

501 502 503 504 505 506 507
	if (!is_guest_mode(&svm->vcpu))
		return;

	c = &svm->vmcb->control;
	h = &svm->nested.hsave->control;
	g = &svm->nested;

508
	c->intercept_cr = h->intercept_cr | g->intercept_cr;
509
	c->intercept_dr = h->intercept_dr | g->intercept_dr;
510
	c->intercept_exceptions = h->intercept_exceptions | g->intercept_exceptions;
511 512 513
	c->intercept = h->intercept | g->intercept;
}

514 515 516 517 518 519 520 521 522 523 524 525 526 527 528 529 530 531 532 533 534 535 536 537 538 539 540 541 542 543 544 545 546
static inline struct vmcb *get_host_vmcb(struct vcpu_svm *svm)
{
	if (is_guest_mode(&svm->vcpu))
		return svm->nested.hsave;
	else
		return svm->vmcb;
}

static inline void set_cr_intercept(struct vcpu_svm *svm, int bit)
{
	struct vmcb *vmcb = get_host_vmcb(svm);

	vmcb->control.intercept_cr |= (1U << bit);

	recalc_intercepts(svm);
}

static inline void clr_cr_intercept(struct vcpu_svm *svm, int bit)
{
	struct vmcb *vmcb = get_host_vmcb(svm);

	vmcb->control.intercept_cr &= ~(1U << bit);

	recalc_intercepts(svm);
}

static inline bool is_cr_intercept(struct vcpu_svm *svm, int bit)
{
	struct vmcb *vmcb = get_host_vmcb(svm);

	return vmcb->control.intercept_cr & (1U << bit);
}

547
static inline void set_dr_intercepts(struct vcpu_svm *svm)
548 549 550
{
	struct vmcb *vmcb = get_host_vmcb(svm);

551 552 553 554 555 556 557 558 559 560 561 562 563 564 565 566
	vmcb->control.intercept_dr = (1 << INTERCEPT_DR0_READ)
		| (1 << INTERCEPT_DR1_READ)
		| (1 << INTERCEPT_DR2_READ)
		| (1 << INTERCEPT_DR3_READ)
		| (1 << INTERCEPT_DR4_READ)
		| (1 << INTERCEPT_DR5_READ)
		| (1 << INTERCEPT_DR6_READ)
		| (1 << INTERCEPT_DR7_READ)
		| (1 << INTERCEPT_DR0_WRITE)
		| (1 << INTERCEPT_DR1_WRITE)
		| (1 << INTERCEPT_DR2_WRITE)
		| (1 << INTERCEPT_DR3_WRITE)
		| (1 << INTERCEPT_DR4_WRITE)
		| (1 << INTERCEPT_DR5_WRITE)
		| (1 << INTERCEPT_DR6_WRITE)
		| (1 << INTERCEPT_DR7_WRITE);
567 568 569 570

	recalc_intercepts(svm);
}

571
static inline void clr_dr_intercepts(struct vcpu_svm *svm)
572 573 574
{
	struct vmcb *vmcb = get_host_vmcb(svm);

575
	vmcb->control.intercept_dr = 0;
576 577 578 579

	recalc_intercepts(svm);
}

580 581 582 583 584 585 586 587 588 589 590 591 592 593 594 595 596 597
static inline void set_exception_intercept(struct vcpu_svm *svm, int bit)
{
	struct vmcb *vmcb = get_host_vmcb(svm);

	vmcb->control.intercept_exceptions |= (1U << bit);

	recalc_intercepts(svm);
}

static inline void clr_exception_intercept(struct vcpu_svm *svm, int bit)
{
	struct vmcb *vmcb = get_host_vmcb(svm);

	vmcb->control.intercept_exceptions &= ~(1U << bit);

	recalc_intercepts(svm);
}

598 599 600 601 602 603 604 605 606 607 608 609 610 611 612 613 614 615
static inline void set_intercept(struct vcpu_svm *svm, int bit)
{
	struct vmcb *vmcb = get_host_vmcb(svm);

	vmcb->control.intercept |= (1ULL << bit);

	recalc_intercepts(svm);
}

static inline void clr_intercept(struct vcpu_svm *svm, int bit)
{
	struct vmcb *vmcb = get_host_vmcb(svm);

	vmcb->control.intercept &= ~(1ULL << bit);

	recalc_intercepts(svm);
}

616 617 618 619 620
static inline bool vgif_enabled(struct vcpu_svm *svm)
{
	return !!(svm->vmcb->control.int_ctl & V_GIF_ENABLE_MASK);
}

621 622
static inline void enable_gif(struct vcpu_svm *svm)
{
623 624 625 626
	if (vgif_enabled(svm))
		svm->vmcb->control.int_ctl |= V_GIF_MASK;
	else
		svm->vcpu.arch.hflags |= HF_GIF_MASK;
627 628 629 630
}

static inline void disable_gif(struct vcpu_svm *svm)
{
631 632 633 634
	if (vgif_enabled(svm))
		svm->vmcb->control.int_ctl &= ~V_GIF_MASK;
	else
		svm->vcpu.arch.hflags &= ~HF_GIF_MASK;
635 636 637 638
}

static inline bool gif_set(struct vcpu_svm *svm)
{
639 640 641 642
	if (vgif_enabled(svm))
		return !!(svm->vmcb->control.int_ctl & V_GIF_MASK);
	else
		return !!(svm->vcpu.arch.hflags & HF_GIF_MASK);
643 644
}

645
static unsigned long iopm_base;
A
Avi Kivity 已提交
646 647 648 649

struct kvm_ldttss_desc {
	u16 limit0;
	u16 base0;
J
Joerg Roedel 已提交
650 651
	unsigned base1:8, type:5, dpl:2, p:1;
	unsigned limit1:4, zero0:3, g:1, base2:8;
A
Avi Kivity 已提交
652 653 654 655 656 657 658
	u32 base3;
	u32 zero1;
} __attribute__((packed));

struct svm_cpu_data {
	int cpu;

A
Avi Kivity 已提交
659 660 661
	u64 asid_generation;
	u32 max_asid;
	u32 next_asid;
662
	u32 min_asid;
A
Avi Kivity 已提交
663 664 665
	struct kvm_ldttss_desc *tss_desc;

	struct page *save_area;
A
Ashok Raj 已提交
666
	struct vmcb *current_vmcb;
667 668 669

	/* index = sev_asid, value = vmcb pointer */
	struct vmcb **sev_vmcbs;
A
Avi Kivity 已提交
670 671 672 673 674 675 676 677 678
};

static DEFINE_PER_CPU(struct svm_cpu_data *, svm_data);

struct svm_init_data {
	int cpu;
	int r;
};

679
static const u32 msrpm_ranges[] = {0, 0xc0000000, 0xc0010000};
A
Avi Kivity 已提交
680

681
#define NUM_MSR_MAPS ARRAY_SIZE(msrpm_ranges)
A
Avi Kivity 已提交
682 683 684
#define MSRS_RANGE_SIZE 2048
#define MSRS_IN_RANGE (MSRS_RANGE_SIZE * 8 / 2)

685 686 687 688 689 690 691 692 693 694 695 696 697 698 699 700 701 702 703 704 705
static u32 svm_msrpm_offset(u32 msr)
{
	u32 offset;
	int i;

	for (i = 0; i < NUM_MSR_MAPS; i++) {
		if (msr < msrpm_ranges[i] ||
		    msr >= msrpm_ranges[i] + MSRS_IN_RANGE)
			continue;

		offset  = (msr - msrpm_ranges[i]) / 4; /* 4 msrs per u8 */
		offset += (i * MSRS_RANGE_SIZE);       /* add range offset */

		/* Now we have the u8 offset - but need the u32 offset */
		return offset / 4;
	}

	/* MSR not in any range */
	return MSR_INVALID;
}

A
Avi Kivity 已提交
706 707 708 709
#define MAX_INST_SIZE 15

static inline void clgi(void)
{
710
	asm volatile (__ex(SVM_CLGI));
A
Avi Kivity 已提交
711 712 713 714
}

static inline void stgi(void)
{
715
	asm volatile (__ex(SVM_STGI));
A
Avi Kivity 已提交
716 717 718 719
}

static inline void invlpga(unsigned long addr, u32 asid)
{
J
Joerg Roedel 已提交
720
	asm volatile (__ex(SVM_INVLPGA) : : "a"(addr), "c"(asid));
A
Avi Kivity 已提交
721 722
}

723
static int get_npt_level(struct kvm_vcpu *vcpu)
724 725
{
#ifdef CONFIG_X86_64
726
	return PT64_ROOT_4LEVEL;
727 728 729 730 731
#else
	return PT32E_ROOT_LEVEL;
#endif
}

A
Avi Kivity 已提交
732 733
static void svm_set_efer(struct kvm_vcpu *vcpu, u64 efer)
{
734
	vcpu->arch.efer = efer;
735
	if (!npt_enabled && !(efer & EFER_LMA))
736
		efer &= ~EFER_LME;
A
Avi Kivity 已提交
737

738
	to_svm(vcpu)->vmcb->save.efer = efer | EFER_SVME;
739
	mark_dirty(to_svm(vcpu)->vmcb, VMCB_CR);
A
Avi Kivity 已提交
740 741 742 743 744 745 746 747
}

static int is_external_interrupt(u32 info)
{
	info &= SVM_EVTINJ_TYPE_MASK | SVM_EVTINJ_VALID;
	return info == (SVM_EVTINJ_VALID | SVM_EVTINJ_TYPE_INTR);
}

748
static u32 svm_get_interrupt_shadow(struct kvm_vcpu *vcpu)
749 750 751 752 753
{
	struct vcpu_svm *svm = to_svm(vcpu);
	u32 ret = 0;

	if (svm->vmcb->control.int_state & SVM_INTERRUPT_SHADOW_MASK)
754 755
		ret = KVM_X86_SHADOW_INT_STI | KVM_X86_SHADOW_INT_MOV_SS;
	return ret;
756 757 758 759 760 761 762 763 764 765 766 767 768
}

static void svm_set_interrupt_shadow(struct kvm_vcpu *vcpu, int mask)
{
	struct vcpu_svm *svm = to_svm(vcpu);

	if (mask == 0)
		svm->vmcb->control.int_state &= ~SVM_INTERRUPT_SHADOW_MASK;
	else
		svm->vmcb->control.int_state |= SVM_INTERRUPT_SHADOW_MASK;

}

A
Avi Kivity 已提交
769 770
static void skip_emulated_instruction(struct kvm_vcpu *vcpu)
{
771 772
	struct vcpu_svm *svm = to_svm(vcpu);

773
	if (svm->vmcb->control.next_rip != 0) {
774
		WARN_ON_ONCE(!static_cpu_has(X86_FEATURE_NRIPS));
775
		svm->next_rip = svm->vmcb->control.next_rip;
776
	}
777

778
	if (!svm->next_rip) {
779
		if (kvm_emulate_instruction(vcpu, EMULTYPE_SKIP) !=
780 781
				EMULATE_DONE)
			printk(KERN_DEBUG "%s: NOP\n", __func__);
A
Avi Kivity 已提交
782 783
		return;
	}
784 785 786
	if (svm->next_rip - kvm_rip_read(vcpu) > MAX_INST_SIZE)
		printk(KERN_ERR "%s: ip 0x%lx next 0x%llx\n",
		       __func__, kvm_rip_read(vcpu), svm->next_rip);
A
Avi Kivity 已提交
787

788
	kvm_rip_write(vcpu, svm->next_rip);
789
	svm_set_interrupt_shadow(vcpu, 0);
A
Avi Kivity 已提交
790 791
}

792
static void svm_queue_exception(struct kvm_vcpu *vcpu)
J
Jan Kiszka 已提交
793 794
{
	struct vcpu_svm *svm = to_svm(vcpu);
795 796
	unsigned nr = vcpu->arch.exception.nr;
	bool has_error_code = vcpu->arch.exception.has_error_code;
797
	bool reinject = vcpu->arch.exception.injected;
798
	u32 error_code = vcpu->arch.exception.error_code;
J
Jan Kiszka 已提交
799

J
Joerg Roedel 已提交
800 801 802 803
	/*
	 * If we are within a nested VM we'd better #VMEXIT and let the guest
	 * handle the exception
	 */
804 805
	if (!reinject &&
	    nested_svm_check_exception(svm, nr, has_error_code, error_code))
J
Jan Kiszka 已提交
806 807
		return;

808
	if (nr == BP_VECTOR && !static_cpu_has(X86_FEATURE_NRIPS)) {
809 810 811 812 813 814 815 816 817 818 819 820 821 822 823
		unsigned long rip, old_rip = kvm_rip_read(&svm->vcpu);

		/*
		 * For guest debugging where we have to reinject #BP if some
		 * INT3 is guest-owned:
		 * Emulate nRIP by moving RIP forward. Will fail if injection
		 * raises a fault that is not intercepted. Still better than
		 * failing in all cases.
		 */
		skip_emulated_instruction(&svm->vcpu);
		rip = kvm_rip_read(&svm->vcpu);
		svm->int3_rip = rip + svm->vmcb->save.cs.base;
		svm->int3_injected = rip - old_rip;
	}

J
Jan Kiszka 已提交
824 825 826 827 828 829 830
	svm->vmcb->control.event_inj = nr
		| SVM_EVTINJ_VALID
		| (has_error_code ? SVM_EVTINJ_VALID_ERR : 0)
		| SVM_EVTINJ_TYPE_EXEPT;
	svm->vmcb->control.event_inj_err = error_code;
}

831 832 833 834 835 836
static void svm_init_erratum_383(void)
{
	u32 low, high;
	int err;
	u64 val;

837
	if (!static_cpu_has_bug(X86_BUG_AMD_TLB_MMATCH))
838 839 840 841 842 843 844 845 846 847 848 849 850 851 852 853 854
		return;

	/* Use _safe variants to not break nested virtualization */
	val = native_read_msr_safe(MSR_AMD64_DC_CFG, &err);
	if (err)
		return;

	val |= (1ULL << 47);

	low  = lower_32_bits(val);
	high = upper_32_bits(val);

	native_write_msr_safe(MSR_AMD64_DC_CFG, low, high);

	erratum_383_found = true;
}

855 856 857 858 859 860 861 862 863 864 865 866 867 868 869 870 871 872 873 874 875
static void svm_init_osvw(struct kvm_vcpu *vcpu)
{
	/*
	 * Guests should see errata 400 and 415 as fixed (assuming that
	 * HLT and IO instructions are intercepted).
	 */
	vcpu->arch.osvw.length = (osvw_len >= 3) ? (osvw_len) : 3;
	vcpu->arch.osvw.status = osvw_status & ~(6ULL);

	/*
	 * By increasing VCPU's osvw.length to 3 we are telling the guest that
	 * all osvw.status bits inside that length, including bit 0 (which is
	 * reserved for erratum 298), are valid. However, if host processor's
	 * osvw_len is 0 then osvw_status[0] carries no information. We need to
	 * be conservative here and therefore we tell the guest that erratum 298
	 * is present (because we really don't know).
	 */
	if (osvw_len == 0 && boot_cpu_data.x86 == 0x10)
		vcpu->arch.osvw.status |= 1;
}

A
Avi Kivity 已提交
876 877
static int has_svm(void)
{
878
	const char *msg;
A
Avi Kivity 已提交
879

880
	if (!cpu_has_svm(&msg)) {
J
Joe Perches 已提交
881
		printk(KERN_INFO "has_svm: %s\n", msg);
A
Avi Kivity 已提交
882 883 884 885 886 887
		return 0;
	}

	return 1;
}

888
static void svm_hardware_disable(void)
A
Avi Kivity 已提交
889
{
890 891 892 893
	/* Make sure we clean up behind us */
	if (static_cpu_has(X86_FEATURE_TSCRATEMSR))
		wrmsrl(MSR_AMD64_TSC_RATIO, TSC_RATIO_DEFAULT);

894
	cpu_svm_disable();
895 896

	amd_pmu_disable_virt();
A
Avi Kivity 已提交
897 898
}

899
static int svm_hardware_enable(void)
A
Avi Kivity 已提交
900 901
{

902
	struct svm_cpu_data *sd;
A
Avi Kivity 已提交
903 904 905 906
	uint64_t efer;
	struct desc_struct *gdt;
	int me = raw_smp_processor_id();

907 908 909 910
	rdmsrl(MSR_EFER, efer);
	if (efer & EFER_SVME)
		return -EBUSY;

A
Avi Kivity 已提交
911
	if (!has_svm()) {
912
		pr_err("%s: err EOPNOTSUPP on %d\n", __func__, me);
913
		return -EINVAL;
A
Avi Kivity 已提交
914
	}
915 916
	sd = per_cpu(svm_data, me);
	if (!sd) {
917
		pr_err("%s: svm_data is NULL on %d\n", __func__, me);
918
		return -EINVAL;
A
Avi Kivity 已提交
919 920
	}

921 922 923
	sd->asid_generation = 1;
	sd->max_asid = cpuid_ebx(SVM_CPUID_FUNC) - 1;
	sd->next_asid = sd->max_asid + 1;
924
	sd->min_asid = max_sev_asid + 1;
A
Avi Kivity 已提交
925

926
	gdt = get_current_gdt_rw();
927
	sd->tss_desc = (struct kvm_ldttss_desc *)(gdt + GDT_ENTRY_TSS);
A
Avi Kivity 已提交
928

929
	wrmsrl(MSR_EFER, efer | EFER_SVME);
A
Avi Kivity 已提交
930

931
	wrmsrl(MSR_VM_HSAVE_PA, page_to_pfn(sd->save_area) << PAGE_SHIFT);
932

933 934
	if (static_cpu_has(X86_FEATURE_TSCRATEMSR)) {
		wrmsrl(MSR_AMD64_TSC_RATIO, TSC_RATIO_DEFAULT);
935
		__this_cpu_write(current_tsc_ratio, TSC_RATIO_DEFAULT);
936 937
	}

938 939 940 941 942 943 944 945 946 947 948 949 950 951 952 953 954 955 956 957 958 959 960 961 962 963 964 965 966 967

	/*
	 * Get OSVW bits.
	 *
	 * Note that it is possible to have a system with mixed processor
	 * revisions and therefore different OSVW bits. If bits are not the same
	 * on different processors then choose the worst case (i.e. if erratum
	 * is present on one processor and not on another then assume that the
	 * erratum is present everywhere).
	 */
	if (cpu_has(&boot_cpu_data, X86_FEATURE_OSVW)) {
		uint64_t len, status = 0;
		int err;

		len = native_read_msr_safe(MSR_AMD64_OSVW_ID_LENGTH, &err);
		if (!err)
			status = native_read_msr_safe(MSR_AMD64_OSVW_STATUS,
						      &err);

		if (err)
			osvw_status = osvw_len = 0;
		else {
			if (len < osvw_len)
				osvw_len = len;
			osvw_status |= status;
			osvw_status &= (1ULL << osvw_len) - 1;
		}
	} else
		osvw_status = osvw_len = 0;

968 969
	svm_init_erratum_383();

970 971
	amd_pmu_enable_virt();

972
	return 0;
A
Avi Kivity 已提交
973 974
}

975 976
static void svm_cpu_uninit(int cpu)
{
977
	struct svm_cpu_data *sd = per_cpu(svm_data, raw_smp_processor_id());
978

979
	if (!sd)
980 981 982
		return;

	per_cpu(svm_data, raw_smp_processor_id()) = NULL;
983
	kfree(sd->sev_vmcbs);
984 985
	__free_page(sd->save_area);
	kfree(sd);
986 987
}

A
Avi Kivity 已提交
988 989
static int svm_cpu_init(int cpu)
{
990
	struct svm_cpu_data *sd;
A
Avi Kivity 已提交
991 992
	int r;

993 994
	sd = kzalloc(sizeof(struct svm_cpu_data), GFP_KERNEL);
	if (!sd)
A
Avi Kivity 已提交
995
		return -ENOMEM;
996
	sd->cpu = cpu;
A
Avi Kivity 已提交
997
	r = -ENOMEM;
998
	sd->save_area = alloc_page(GFP_KERNEL);
999
	if (!sd->save_area)
A
Avi Kivity 已提交
1000 1001
		goto err_1;

1002 1003
	if (svm_sev_enabled()) {
		r = -ENOMEM;
1004 1005 1006
		sd->sev_vmcbs = kmalloc_array(max_sev_asid + 1,
					      sizeof(void *),
					      GFP_KERNEL);
1007 1008 1009 1010
		if (!sd->sev_vmcbs)
			goto err_1;
	}

1011
	per_cpu(svm_data, cpu) = sd;
A
Avi Kivity 已提交
1012 1013 1014 1015

	return 0;

err_1:
1016
	kfree(sd);
A
Avi Kivity 已提交
1017 1018 1019 1020
	return r;

}

1021 1022 1023 1024 1025 1026 1027 1028 1029 1030 1031
static bool valid_msr_intercept(u32 index)
{
	int i;

	for (i = 0; direct_access_msrs[i].index != MSR_INVALID; i++)
		if (direct_access_msrs[i].index == index)
			return true;

	return false;
}

1032 1033 1034 1035 1036 1037 1038 1039 1040 1041 1042 1043 1044 1045 1046 1047 1048 1049 1050
static bool msr_write_intercepted(struct kvm_vcpu *vcpu, unsigned msr)
{
	u8 bit_write;
	unsigned long tmp;
	u32 offset;
	u32 *msrpm;

	msrpm = is_guest_mode(vcpu) ? to_svm(vcpu)->nested.msrpm:
				      to_svm(vcpu)->msrpm;

	offset    = svm_msrpm_offset(msr);
	bit_write = 2 * (msr & 0x0f) + 1;
	tmp       = msrpm[offset];

	BUG_ON(offset == MSR_INVALID);

	return !!test_bit(bit_write,  &tmp);
}

1051 1052
static void set_msr_interception(u32 *msrpm, unsigned msr,
				 int read, int write)
A
Avi Kivity 已提交
1053
{
1054 1055 1056
	u8 bit_read, bit_write;
	unsigned long tmp;
	u32 offset;
A
Avi Kivity 已提交
1057

1058 1059 1060 1061 1062 1063
	/*
	 * If this warning triggers extend the direct_access_msrs list at the
	 * beginning of the file
	 */
	WARN_ON(!valid_msr_intercept(msr));

1064 1065 1066 1067 1068 1069 1070 1071 1072 1073 1074
	offset    = svm_msrpm_offset(msr);
	bit_read  = 2 * (msr & 0x0f);
	bit_write = 2 * (msr & 0x0f) + 1;
	tmp       = msrpm[offset];

	BUG_ON(offset == MSR_INVALID);

	read  ? clear_bit(bit_read,  &tmp) : set_bit(bit_read,  &tmp);
	write ? clear_bit(bit_write, &tmp) : set_bit(bit_write, &tmp);

	msrpm[offset] = tmp;
A
Avi Kivity 已提交
1075 1076
}

1077
static void svm_vcpu_init_msrpm(u32 *msrpm)
A
Avi Kivity 已提交
1078 1079 1080
{
	int i;

1081 1082
	memset(msrpm, 0xff, PAGE_SIZE * (1 << MSRPM_ALLOC_ORDER));

1083 1084 1085 1086 1087 1088
	for (i = 0; direct_access_msrs[i].index != MSR_INVALID; i++) {
		if (!direct_access_msrs[i].always)
			continue;

		set_msr_interception(msrpm, direct_access_msrs[i].index, 1, 1);
	}
1089 1090
}

1091 1092 1093 1094 1095 1096 1097 1098
static void add_msr_offset(u32 offset)
{
	int i;

	for (i = 0; i < MSRPM_OFFSETS; ++i) {

		/* Offset already in list? */
		if (msrpm_offsets[i] == offset)
1099
			return;
1100 1101 1102 1103 1104 1105 1106 1107 1108

		/* Slot used by another offset? */
		if (msrpm_offsets[i] != MSR_INVALID)
			continue;

		/* Add offset to list */
		msrpm_offsets[i] = offset;

		return;
A
Avi Kivity 已提交
1109
	}
1110 1111 1112 1113 1114

	/*
	 * If this BUG triggers the msrpm_offsets table has an overflow. Just
	 * increase MSRPM_OFFSETS in this case.
	 */
1115
	BUG();
A
Avi Kivity 已提交
1116 1117
}

1118
static void init_msrpm_offsets(void)
1119
{
1120
	int i;
1121

1122 1123 1124 1125 1126 1127 1128 1129 1130 1131
	memset(msrpm_offsets, 0xff, sizeof(msrpm_offsets));

	for (i = 0; direct_access_msrs[i].index != MSR_INVALID; i++) {
		u32 offset;

		offset = svm_msrpm_offset(direct_access_msrs[i].index);
		BUG_ON(offset == MSR_INVALID);

		add_msr_offset(offset);
	}
1132 1133
}

1134 1135 1136 1137
static void svm_enable_lbrv(struct vcpu_svm *svm)
{
	u32 *msrpm = svm->msrpm;

1138
	svm->vmcb->control.virt_ext |= LBR_CTL_ENABLE_MASK;
1139 1140 1141 1142 1143 1144 1145 1146 1147 1148
	set_msr_interception(msrpm, MSR_IA32_LASTBRANCHFROMIP, 1, 1);
	set_msr_interception(msrpm, MSR_IA32_LASTBRANCHTOIP, 1, 1);
	set_msr_interception(msrpm, MSR_IA32_LASTINTFROMIP, 1, 1);
	set_msr_interception(msrpm, MSR_IA32_LASTINTTOIP, 1, 1);
}

static void svm_disable_lbrv(struct vcpu_svm *svm)
{
	u32 *msrpm = svm->msrpm;

1149
	svm->vmcb->control.virt_ext &= ~LBR_CTL_ENABLE_MASK;
1150 1151 1152 1153 1154 1155
	set_msr_interception(msrpm, MSR_IA32_LASTBRANCHFROMIP, 0, 0);
	set_msr_interception(msrpm, MSR_IA32_LASTBRANCHTOIP, 0, 0);
	set_msr_interception(msrpm, MSR_IA32_LASTINTFROMIP, 0, 0);
	set_msr_interception(msrpm, MSR_IA32_LASTINTTOIP, 0, 0);
}

1156 1157 1158
static void disable_nmi_singlestep(struct vcpu_svm *svm)
{
	svm->nmi_singlestep = false;
1159

1160 1161 1162 1163 1164 1165 1166
	if (!(svm->vcpu.guest_debug & KVM_GUESTDBG_SINGLESTEP)) {
		/* Clear our flags if they were not set by the guest */
		if (!(svm->nmi_singlestep_guest_rflags & X86_EFLAGS_TF))
			svm->vmcb->save.rflags &= ~X86_EFLAGS_TF;
		if (!(svm->nmi_singlestep_guest_rflags & X86_EFLAGS_RF))
			svm->vmcb->save.rflags &= ~X86_EFLAGS_RF;
	}
1167 1168
}

1169
/* Note:
1170
 * This hash table is used to map VM_ID to a struct kvm_svm,
1171 1172 1173 1174
 * when handling AMD IOMMU GALOG notification to schedule in
 * a particular vCPU.
 */
#define SVM_VM_DATA_HASH_BITS	8
1175
static DEFINE_HASHTABLE(svm_vm_data_hash, SVM_VM_DATA_HASH_BITS);
1176 1177
static u32 next_vm_id = 0;
static bool next_vm_id_wrapped = 0;
1178
static DEFINE_SPINLOCK(svm_vm_data_hash_lock);
1179 1180 1181 1182 1183 1184 1185 1186

/* Note:
 * This function is called from IOMMU driver to notify
 * SVM to schedule in a particular vCPU of a particular VM.
 */
static int avic_ga_log_notifier(u32 ga_tag)
{
	unsigned long flags;
1187
	struct kvm_svm *kvm_svm;
1188 1189 1190 1191 1192 1193 1194
	struct kvm_vcpu *vcpu = NULL;
	u32 vm_id = AVIC_GATAG_TO_VMID(ga_tag);
	u32 vcpu_id = AVIC_GATAG_TO_VCPUID(ga_tag);

	pr_debug("SVM: %s: vm_id=%#x, vcpu_id=%#x\n", __func__, vm_id, vcpu_id);

	spin_lock_irqsave(&svm_vm_data_hash_lock, flags);
1195 1196
	hash_for_each_possible(svm_vm_data_hash, kvm_svm, hnode, vm_id) {
		if (kvm_svm->avic_vm_id != vm_id)
1197
			continue;
1198
		vcpu = kvm_get_vcpu_by_id(&kvm_svm->kvm, vcpu_id);
1199 1200 1201 1202 1203 1204 1205 1206 1207
		break;
	}
	spin_unlock_irqrestore(&svm_vm_data_hash_lock, flags);

	/* Note:
	 * At this point, the IOMMU should have already set the pending
	 * bit in the vAPIC backing page. So, we just need to schedule
	 * in the vcpu.
	 */
1208
	if (vcpu)
1209 1210 1211 1212 1213
		kvm_vcpu_wake_up(vcpu);

	return 0;
}

B
Brijesh Singh 已提交
1214 1215 1216 1217 1218 1219 1220 1221 1222 1223 1224
static __init int sev_hardware_setup(void)
{
	struct sev_user_data_status *status;
	int rc;

	/* Maximum number of encrypted guests supported simultaneously */
	max_sev_asid = cpuid_ecx(0x8000001F);

	if (!max_sev_asid)
		return 1;

B
Brijesh Singh 已提交
1225 1226 1227 1228
	/* Minimum ASID value that should be used for SEV guest */
	min_sev_asid = cpuid_edx(0x8000001F);

	/* Initialize SEV ASID bitmap */
1229
	sev_asid_bitmap = bitmap_zalloc(max_sev_asid, GFP_KERNEL);
B
Brijesh Singh 已提交
1230 1231 1232
	if (!sev_asid_bitmap)
		return 1;

B
Brijesh Singh 已提交
1233 1234 1235 1236 1237 1238 1239 1240 1241 1242 1243 1244 1245 1246 1247 1248 1249 1250 1251 1252 1253 1254
	status = kmalloc(sizeof(*status), GFP_KERNEL);
	if (!status)
		return 1;

	/*
	 * Check SEV platform status.
	 *
	 * PLATFORM_STATUS can be called in any state, if we failed to query
	 * the PLATFORM status then either PSP firmware does not support SEV
	 * feature or SEV firmware is dead.
	 */
	rc = sev_platform_status(status, NULL);
	if (rc)
		goto err;

	pr_info("SEV supported\n");

err:
	kfree(status);
	return rc;
}

1255 1256 1257 1258 1259 1260 1261 1262 1263 1264 1265 1266 1267 1268 1269 1270 1271 1272 1273 1274 1275 1276 1277 1278 1279 1280 1281 1282 1283 1284 1285 1286 1287 1288 1289 1290
static void grow_ple_window(struct kvm_vcpu *vcpu)
{
	struct vcpu_svm *svm = to_svm(vcpu);
	struct vmcb_control_area *control = &svm->vmcb->control;
	int old = control->pause_filter_count;

	control->pause_filter_count = __grow_ple_window(old,
							pause_filter_count,
							pause_filter_count_grow,
							pause_filter_count_max);

	if (control->pause_filter_count != old)
		mark_dirty(svm->vmcb, VMCB_INTERCEPTS);

	trace_kvm_ple_window_grow(vcpu->vcpu_id,
				  control->pause_filter_count, old);
}

static void shrink_ple_window(struct kvm_vcpu *vcpu)
{
	struct vcpu_svm *svm = to_svm(vcpu);
	struct vmcb_control_area *control = &svm->vmcb->control;
	int old = control->pause_filter_count;

	control->pause_filter_count =
				__shrink_ple_window(old,
						    pause_filter_count,
						    pause_filter_count_shrink,
						    pause_filter_count);
	if (control->pause_filter_count != old)
		mark_dirty(svm->vmcb, VMCB_INTERCEPTS);

	trace_kvm_ple_window_shrink(vcpu->vcpu_id,
				    control->pause_filter_count, old);
}

A
Avi Kivity 已提交
1291 1292 1293 1294
static __init int svm_hardware_setup(void)
{
	int cpu;
	struct page *iopm_pages;
1295
	void *iopm_va;
A
Avi Kivity 已提交
1296 1297 1298 1299 1300 1301
	int r;

	iopm_pages = alloc_pages(GFP_KERNEL, IOPM_ALLOC_ORDER);

	if (!iopm_pages)
		return -ENOMEM;
1302 1303 1304

	iopm_va = page_address(iopm_pages);
	memset(iopm_va, 0xff, PAGE_SIZE * (1 << IOPM_ALLOC_ORDER));
A
Avi Kivity 已提交
1305 1306
	iopm_base = page_to_pfn(iopm_pages) << PAGE_SHIFT;

1307 1308
	init_msrpm_offsets();

1309 1310 1311
	if (boot_cpu_has(X86_FEATURE_NX))
		kvm_enable_efer_bits(EFER_NX);

A
Alexander Graf 已提交
1312 1313 1314
	if (boot_cpu_has(X86_FEATURE_FXSR_OPT))
		kvm_enable_efer_bits(EFER_FFXSR);

1315 1316
	if (boot_cpu_has(X86_FEATURE_TSCRATEMSR)) {
		kvm_has_tsc_control = true;
1317 1318
		kvm_max_tsc_scaling_ratio = TSC_RATIO_MAX;
		kvm_tsc_scaling_ratio_frac_bits = 32;
1319 1320
	}

1321 1322 1323 1324 1325 1326 1327 1328
	/* Check for pause filtering support */
	if (!boot_cpu_has(X86_FEATURE_PAUSEFILTER)) {
		pause_filter_count = 0;
		pause_filter_thresh = 0;
	} else if (!boot_cpu_has(X86_FEATURE_PFTHRESHOLD)) {
		pause_filter_thresh = 0;
	}

1329 1330
	if (nested) {
		printk(KERN_INFO "kvm: Nested Virtualization enabled\n");
1331
		kvm_enable_efer_bits(EFER_SVME | EFER_LMSLE);
1332 1333
	}

B
Brijesh Singh 已提交
1334 1335 1336 1337 1338 1339 1340 1341 1342 1343 1344
	if (sev) {
		if (boot_cpu_has(X86_FEATURE_SEV) &&
		    IS_ENABLED(CONFIG_KVM_AMD_SEV)) {
			r = sev_hardware_setup();
			if (r)
				sev = false;
		} else {
			sev = false;
		}
	}

Z
Zachary Amsden 已提交
1345
	for_each_possible_cpu(cpu) {
A
Avi Kivity 已提交
1346 1347
		r = svm_cpu_init(cpu);
		if (r)
1348
			goto err;
A
Avi Kivity 已提交
1349
	}
1350

1351
	if (!boot_cpu_has(X86_FEATURE_NPT))
1352 1353
		npt_enabled = false;

1354 1355 1356 1357 1358
	if (npt_enabled && !npt) {
		printk(KERN_INFO "kvm: Nested Paging disabled\n");
		npt_enabled = false;
	}

1359
	if (npt_enabled) {
1360
		printk(KERN_INFO "kvm: Nested Paging enabled\n");
1361
		kvm_enable_tdp();
1362 1363
	} else
		kvm_disable_tdp();
1364

1365 1366 1367
	if (avic) {
		if (!npt_enabled ||
		    !boot_cpu_has(X86_FEATURE_AVIC) ||
1368
		    !IS_ENABLED(CONFIG_X86_LOCAL_APIC)) {
1369
			avic = false;
1370
		} else {
1371
			pr_info("AVIC enabled\n");
1372 1373 1374

			amd_iommu_register_ga_log_notifier(&avic_ga_log_notifier);
		}
1375
	}
1376

1377 1378
	if (vls) {
		if (!npt_enabled ||
1379
		    !boot_cpu_has(X86_FEATURE_V_VMSAVE_VMLOAD) ||
1380 1381 1382 1383 1384 1385 1386
		    !IS_ENABLED(CONFIG_X86_64)) {
			vls = false;
		} else {
			pr_info("Virtual VMLOAD VMSAVE supported\n");
		}
	}

1387 1388 1389 1390 1391 1392 1393
	if (vgif) {
		if (!boot_cpu_has(X86_FEATURE_VGIF))
			vgif = false;
		else
			pr_info("Virtual GIF supported\n");
	}

A
Avi Kivity 已提交
1394 1395
	return 0;

1396
err:
A
Avi Kivity 已提交
1397 1398 1399 1400 1401 1402 1403
	__free_pages(iopm_pages, IOPM_ALLOC_ORDER);
	iopm_base = 0;
	return r;
}

static __exit void svm_hardware_unsetup(void)
{
1404 1405
	int cpu;

B
Brijesh Singh 已提交
1406
	if (svm_sev_enabled())
1407
		bitmap_free(sev_asid_bitmap);
B
Brijesh Singh 已提交
1408

Z
Zachary Amsden 已提交
1409
	for_each_possible_cpu(cpu)
1410 1411
		svm_cpu_uninit(cpu);

A
Avi Kivity 已提交
1412
	__free_pages(pfn_to_page(iopm_base >> PAGE_SHIFT), IOPM_ALLOC_ORDER);
1413
	iopm_base = 0;
A
Avi Kivity 已提交
1414 1415 1416 1417 1418 1419
}

static void init_seg(struct vmcb_seg *seg)
{
	seg->selector = 0;
	seg->attrib = SVM_SELECTOR_P_MASK | SVM_SELECTOR_S_MASK |
J
Joerg Roedel 已提交
1420
		      SVM_SELECTOR_WRITE_MASK; /* Read/Write Data Segment */
A
Avi Kivity 已提交
1421 1422 1423 1424 1425 1426 1427 1428 1429 1430 1431 1432
	seg->limit = 0xffff;
	seg->base = 0;
}

static void init_sys_seg(struct vmcb_seg *seg, uint32_t type)
{
	seg->selector = 0;
	seg->attrib = SVM_SELECTOR_P_MASK | type;
	seg->limit = 0xffff;
	seg->base = 0;
}

1433 1434 1435 1436 1437 1438 1439 1440 1441 1442
static u64 svm_read_l1_tsc_offset(struct kvm_vcpu *vcpu)
{
	struct vcpu_svm *svm = to_svm(vcpu);

	if (is_guest_mode(vcpu))
		return svm->nested.hsave->control.tsc_offset;

	return vcpu->arch.tsc_offset;
}

1443 1444 1445 1446 1447
static void svm_write_tsc_offset(struct kvm_vcpu *vcpu, u64 offset)
{
	struct vcpu_svm *svm = to_svm(vcpu);
	u64 g_tsc_offset = 0;

1448
	if (is_guest_mode(vcpu)) {
1449
		/* Write L1's TSC offset.  */
1450 1451 1452
		g_tsc_offset = svm->vmcb->control.tsc_offset -
			       svm->nested.hsave->control.tsc_offset;
		svm->nested.hsave->control.tsc_offset = offset;
1453 1454 1455 1456
	} else
		trace_kvm_write_tsc_offset(vcpu->vcpu_id,
					   svm->vmcb->control.tsc_offset,
					   offset);
1457 1458

	svm->vmcb->control.tsc_offset = offset + g_tsc_offset;
1459 1460

	mark_dirty(svm->vmcb, VMCB_INTERCEPTS);
1461 1462
}

1463 1464 1465
static void avic_init_vmcb(struct vcpu_svm *svm)
{
	struct vmcb *vmcb = svm->vmcb;
1466
	struct kvm_svm *kvm_svm = to_kvm_svm(svm->vcpu.kvm);
1467
	phys_addr_t bpa = __sme_set(page_to_phys(svm->avic_backing_page));
1468 1469
	phys_addr_t lpa = __sme_set(page_to_phys(kvm_svm->avic_logical_id_table_page));
	phys_addr_t ppa = __sme_set(page_to_phys(kvm_svm->avic_physical_id_table_page));
1470 1471 1472 1473 1474 1475 1476 1477

	vmcb->control.avic_backing_page = bpa & AVIC_HPA_MASK;
	vmcb->control.avic_logical_id = lpa & AVIC_HPA_MASK;
	vmcb->control.avic_physical_id = ppa & AVIC_HPA_MASK;
	vmcb->control.avic_physical_id |= AVIC_MAX_PHYSICAL_ID_COUNT;
	vmcb->control.int_ctl |= AVIC_ENABLE_MASK;
}

P
Paolo Bonzini 已提交
1478
static void init_vmcb(struct vcpu_svm *svm)
A
Avi Kivity 已提交
1479
{
1480 1481
	struct vmcb_control_area *control = &svm->vmcb->control;
	struct vmcb_save_area *save = &svm->vmcb->save;
A
Avi Kivity 已提交
1482

1483
	svm->vcpu.arch.hflags = 0;
1484

1485 1486 1487 1488 1489 1490
	set_cr_intercept(svm, INTERCEPT_CR0_READ);
	set_cr_intercept(svm, INTERCEPT_CR3_READ);
	set_cr_intercept(svm, INTERCEPT_CR4_READ);
	set_cr_intercept(svm, INTERCEPT_CR0_WRITE);
	set_cr_intercept(svm, INTERCEPT_CR3_WRITE);
	set_cr_intercept(svm, INTERCEPT_CR4_WRITE);
1491 1492
	if (!kvm_vcpu_apicv_active(&svm->vcpu))
		set_cr_intercept(svm, INTERCEPT_CR8_WRITE);
A
Avi Kivity 已提交
1493

1494
	set_dr_intercepts(svm);
A
Avi Kivity 已提交
1495

1496 1497 1498
	set_exception_intercept(svm, PF_VECTOR);
	set_exception_intercept(svm, UD_VECTOR);
	set_exception_intercept(svm, MC_VECTOR);
1499
	set_exception_intercept(svm, AC_VECTOR);
1500
	set_exception_intercept(svm, DB_VECTOR);
1501 1502 1503 1504 1505 1506 1507 1508
	/*
	 * Guest access to VMware backdoor ports could legitimately
	 * trigger #GP because of TSS I/O permission bitmap.
	 * We intercept those #GP and allow access to them anyway
	 * as VMware does.
	 */
	if (enable_vmware_backdoor)
		set_exception_intercept(svm, GP_VECTOR);
A
Avi Kivity 已提交
1509

1510 1511 1512 1513
	set_intercept(svm, INTERCEPT_INTR);
	set_intercept(svm, INTERCEPT_NMI);
	set_intercept(svm, INTERCEPT_SMI);
	set_intercept(svm, INTERCEPT_SELECTIVE_CR0);
A
Avi Kivity 已提交
1514
	set_intercept(svm, INTERCEPT_RDPMC);
1515 1516 1517 1518 1519 1520 1521 1522 1523 1524 1525 1526 1527 1528 1529 1530
	set_intercept(svm, INTERCEPT_CPUID);
	set_intercept(svm, INTERCEPT_INVD);
	set_intercept(svm, INTERCEPT_INVLPG);
	set_intercept(svm, INTERCEPT_INVLPGA);
	set_intercept(svm, INTERCEPT_IOIO_PROT);
	set_intercept(svm, INTERCEPT_MSR_PROT);
	set_intercept(svm, INTERCEPT_TASK_SWITCH);
	set_intercept(svm, INTERCEPT_SHUTDOWN);
	set_intercept(svm, INTERCEPT_VMRUN);
	set_intercept(svm, INTERCEPT_VMMCALL);
	set_intercept(svm, INTERCEPT_VMLOAD);
	set_intercept(svm, INTERCEPT_VMSAVE);
	set_intercept(svm, INTERCEPT_STGI);
	set_intercept(svm, INTERCEPT_CLGI);
	set_intercept(svm, INTERCEPT_SKINIT);
	set_intercept(svm, INTERCEPT_WBINVD);
J
Joerg Roedel 已提交
1531
	set_intercept(svm, INTERCEPT_XSETBV);
B
Brijesh Singh 已提交
1532
	set_intercept(svm, INTERCEPT_RSM);
A
Avi Kivity 已提交
1533

1534
	if (!kvm_mwait_in_guest(svm->vcpu.kvm)) {
1535 1536 1537 1538
		set_intercept(svm, INTERCEPT_MONITOR);
		set_intercept(svm, INTERCEPT_MWAIT);
	}

1539 1540 1541
	if (!kvm_hlt_in_guest(svm->vcpu.kvm))
		set_intercept(svm, INTERCEPT_HLT);

1542 1543
	control->iopm_base_pa = __sme_set(iopm_base);
	control->msrpm_base_pa = __sme_set(__pa(svm->msrpm));
A
Avi Kivity 已提交
1544 1545 1546 1547 1548 1549 1550 1551 1552
	control->int_ctl = V_INTR_MASKING_MASK;

	init_seg(&save->es);
	init_seg(&save->ss);
	init_seg(&save->ds);
	init_seg(&save->fs);
	init_seg(&save->gs);

	save->cs.selector = 0xf000;
1553
	save->cs.base = 0xffff0000;
A
Avi Kivity 已提交
1554 1555 1556 1557 1558 1559 1560 1561 1562 1563 1564
	/* Executable/Readable Code Segment */
	save->cs.attrib = SVM_SELECTOR_READ_MASK | SVM_SELECTOR_P_MASK |
		SVM_SELECTOR_S_MASK | SVM_SELECTOR_CODE_MASK;
	save->cs.limit = 0xffff;

	save->gdtr.limit = 0xffff;
	save->idtr.limit = 0xffff;

	init_sys_seg(&save->ldtr, SEG_TYPE_LDT);
	init_sys_seg(&save->tr, SEG_TYPE_BUSY_TSS16);

P
Paolo Bonzini 已提交
1565
	svm_set_efer(&svm->vcpu, 0);
M
Mike Day 已提交
1566
	save->dr6 = 0xffff0ff0;
1567
	kvm_set_rflags(&svm->vcpu, 2);
A
Avi Kivity 已提交
1568
	save->rip = 0x0000fff0;
1569
	svm->vcpu.arch.regs[VCPU_REGS_RIP] = save->rip;
A
Avi Kivity 已提交
1570

J
Joerg Roedel 已提交
1571
	/*
1572
	 * svm_set_cr0() sets PG and WP and clears NW and CD on save->cr0.
1573
	 * It also updates the guest-visible cr0 value.
A
Avi Kivity 已提交
1574
	 */
1575
	svm_set_cr0(&svm->vcpu, X86_CR0_NW | X86_CR0_CD | X86_CR0_ET);
1576
	kvm_mmu_reset_context(&svm->vcpu);
1577

1578
	save->cr4 = X86_CR4_PAE;
A
Avi Kivity 已提交
1579
	/* rdx = ?? */
1580 1581 1582

	if (npt_enabled) {
		/* Setup VMCB for Nested Paging */
1583
		control->nested_ctl |= SVM_NESTED_CTL_NP_ENABLE;
1584
		clr_intercept(svm, INTERCEPT_INVLPG);
1585
		clr_exception_intercept(svm, PF_VECTOR);
1586 1587
		clr_cr_intercept(svm, INTERCEPT_CR3_READ);
		clr_cr_intercept(svm, INTERCEPT_CR3_WRITE);
1588
		save->g_pat = svm->vcpu.arch.pat;
1589 1590 1591
		save->cr3 = 0;
		save->cr4 = 0;
	}
1592
	svm->asid_generation = 0;
1593

1594
	svm->nested.vmcb = 0;
1595 1596
	svm->vcpu.arch.hflags = 0;

1597 1598 1599 1600
	if (pause_filter_count) {
		control->pause_filter_count = pause_filter_count;
		if (pause_filter_thresh)
			control->pause_filter_thresh = pause_filter_thresh;
1601
		set_intercept(svm, INTERCEPT_PAUSE);
1602 1603
	} else {
		clr_intercept(svm, INTERCEPT_PAUSE);
1604 1605
	}

1606
	if (kvm_vcpu_apicv_active(&svm->vcpu))
1607 1608
		avic_init_vmcb(svm);

1609 1610 1611 1612 1613 1614 1615 1616 1617 1618
	/*
	 * If hardware supports Virtual VMLOAD VMSAVE then enable it
	 * in VMCB and clear intercepts to avoid #VMEXIT.
	 */
	if (vls) {
		clr_intercept(svm, INTERCEPT_VMLOAD);
		clr_intercept(svm, INTERCEPT_VMSAVE);
		svm->vmcb->control.virt_ext |= VIRTUAL_VMLOAD_VMSAVE_ENABLE_MASK;
	}

1619 1620 1621 1622 1623 1624
	if (vgif) {
		clr_intercept(svm, INTERCEPT_STGI);
		clr_intercept(svm, INTERCEPT_CLGI);
		svm->vmcb->control.int_ctl |= V_GIF_ENABLE_MASK;
	}

1625
	if (sev_guest(svm->vcpu.kvm)) {
B
Brijesh Singh 已提交
1626
		svm->vmcb->control.nested_ctl |= SVM_NESTED_CTL_SEV_ENABLE;
1627 1628
		clr_exception_intercept(svm, UD_VECTOR);
	}
B
Brijesh Singh 已提交
1629

1630 1631
	mark_all_dirty(svm->vmcb);

1632
	enable_gif(svm);
1633 1634 1635

}

1636 1637
static u64 *avic_get_physical_id_entry(struct kvm_vcpu *vcpu,
				       unsigned int index)
1638 1639
{
	u64 *avic_physical_id_table;
1640
	struct kvm_svm *kvm_svm = to_kvm_svm(vcpu->kvm);
1641 1642 1643 1644

	if (index >= AVIC_MAX_PHYSICAL_ID_COUNT)
		return NULL;

1645
	avic_physical_id_table = page_address(kvm_svm->avic_physical_id_table_page);
1646 1647 1648 1649 1650 1651 1652 1653 1654 1655 1656 1657 1658 1659 1660 1661 1662 1663 1664 1665 1666 1667 1668 1669 1670 1671 1672 1673 1674 1675 1676 1677 1678 1679 1680 1681 1682 1683 1684 1685 1686 1687 1688 1689 1690 1691 1692 1693 1694 1695 1696 1697 1698 1699 1700 1701

	return &avic_physical_id_table[index];
}

/**
 * Note:
 * AVIC hardware walks the nested page table to check permissions,
 * but does not use the SPA address specified in the leaf page
 * table entry since it uses  address in the AVIC_BACKING_PAGE pointer
 * field of the VMCB. Therefore, we set up the
 * APIC_ACCESS_PAGE_PRIVATE_MEMSLOT (4KB) here.
 */
static int avic_init_access_page(struct kvm_vcpu *vcpu)
{
	struct kvm *kvm = vcpu->kvm;
	int ret;

	if (kvm->arch.apic_access_page_done)
		return 0;

	ret = x86_set_memory_region(kvm,
				    APIC_ACCESS_PAGE_PRIVATE_MEMSLOT,
				    APIC_DEFAULT_PHYS_BASE,
				    PAGE_SIZE);
	if (ret)
		return ret;

	kvm->arch.apic_access_page_done = true;
	return 0;
}

static int avic_init_backing_page(struct kvm_vcpu *vcpu)
{
	int ret;
	u64 *entry, new_entry;
	int id = vcpu->vcpu_id;
	struct vcpu_svm *svm = to_svm(vcpu);

	ret = avic_init_access_page(vcpu);
	if (ret)
		return ret;

	if (id >= AVIC_MAX_PHYSICAL_ID_COUNT)
		return -EINVAL;

	if (!svm->vcpu.arch.apic->regs)
		return -EINVAL;

	svm->avic_backing_page = virt_to_page(svm->vcpu.arch.apic->regs);

	/* Setting AVIC backing page address in the phy APIC ID table */
	entry = avic_get_physical_id_entry(vcpu, id);
	if (!entry)
		return -EINVAL;

	new_entry = READ_ONCE(*entry);
1702 1703 1704
	new_entry = __sme_set((page_to_phys(svm->avic_backing_page) &
			      AVIC_PHYSICAL_ID_ENTRY_BACKING_PAGE_MASK) |
			      AVIC_PHYSICAL_ID_ENTRY_VALID_MASK);
1705 1706 1707 1708 1709 1710 1711
	WRITE_ONCE(*entry, new_entry);

	svm->avic_physical_id_cache = entry;

	return 0;
}

B
Brijesh Singh 已提交
1712 1713
static void __sev_asid_free(int asid)
{
1714 1715
	struct svm_cpu_data *sd;
	int cpu, pos;
B
Brijesh Singh 已提交
1716 1717 1718

	pos = asid - 1;
	clear_bit(pos, sev_asid_bitmap);
1719 1720 1721 1722 1723

	for_each_possible_cpu(cpu) {
		sd = per_cpu(svm_data, cpu);
		sd->sev_vmcbs[pos] = NULL;
	}
B
Brijesh Singh 已提交
1724 1725 1726 1727
}

static void sev_asid_free(struct kvm *kvm)
{
1728
	struct kvm_sev_info *sev = &to_kvm_svm(kvm)->sev_info;
B
Brijesh Singh 已提交
1729 1730 1731 1732

	__sev_asid_free(sev->asid);
}

1733 1734 1735 1736 1737 1738 1739 1740 1741 1742 1743 1744 1745 1746 1747 1748 1749 1750 1751 1752 1753 1754 1755 1756 1757 1758 1759 1760 1761 1762 1763
static void sev_unbind_asid(struct kvm *kvm, unsigned int handle)
{
	struct sev_data_decommission *decommission;
	struct sev_data_deactivate *data;

	if (!handle)
		return;

	data = kzalloc(sizeof(*data), GFP_KERNEL);
	if (!data)
		return;

	/* deactivate handle */
	data->handle = handle;
	sev_guest_deactivate(data, NULL);

	wbinvd_on_all_cpus();
	sev_guest_df_flush(NULL);
	kfree(data);

	decommission = kzalloc(sizeof(*decommission), GFP_KERNEL);
	if (!decommission)
		return;

	/* decommission handle */
	decommission->handle = handle;
	sev_guest_decommission(decommission, NULL);

	kfree(decommission);
}

1764 1765 1766 1767
static struct page **sev_pin_memory(struct kvm *kvm, unsigned long uaddr,
				    unsigned long ulen, unsigned long *n,
				    int write)
{
1768
	struct kvm_sev_info *sev = &to_kvm_svm(kvm)->sev_info;
1769 1770 1771
	unsigned long npages, npinned, size;
	unsigned long locked, lock_limit;
	struct page **pages;
1772 1773 1774 1775
	unsigned long first, last;

	if (ulen == 0 || uaddr + ulen < uaddr)
		return NULL;
1776 1777 1778 1779 1780 1781 1782 1783 1784 1785 1786 1787 1788 1789 1790 1791 1792 1793 1794 1795 1796 1797 1798 1799 1800 1801 1802 1803 1804 1805 1806 1807 1808 1809 1810 1811 1812 1813 1814 1815 1816 1817 1818 1819 1820 1821

	/* Calculate number of pages. */
	first = (uaddr & PAGE_MASK) >> PAGE_SHIFT;
	last = ((uaddr + ulen - 1) & PAGE_MASK) >> PAGE_SHIFT;
	npages = (last - first + 1);

	locked = sev->pages_locked + npages;
	lock_limit = rlimit(RLIMIT_MEMLOCK) >> PAGE_SHIFT;
	if (locked > lock_limit && !capable(CAP_IPC_LOCK)) {
		pr_err("SEV: %lu locked pages exceed the lock limit of %lu.\n", locked, lock_limit);
		return NULL;
	}

	/* Avoid using vmalloc for smaller buffers. */
	size = npages * sizeof(struct page *);
	if (size > PAGE_SIZE)
		pages = vmalloc(size);
	else
		pages = kmalloc(size, GFP_KERNEL);

	if (!pages)
		return NULL;

	/* Pin the user virtual address. */
	npinned = get_user_pages_fast(uaddr, npages, write ? FOLL_WRITE : 0, pages);
	if (npinned != npages) {
		pr_err("SEV: Failure locking %lu pages.\n", npages);
		goto err;
	}

	*n = npages;
	sev->pages_locked = locked;

	return pages;

err:
	if (npinned > 0)
		release_pages(pages, npinned);

	kvfree(pages);
	return NULL;
}

static void sev_unpin_memory(struct kvm *kvm, struct page **pages,
			     unsigned long npages)
{
1822
	struct kvm_sev_info *sev = &to_kvm_svm(kvm)->sev_info;
1823 1824 1825 1826 1827 1828 1829 1830 1831 1832 1833 1834 1835 1836 1837 1838 1839 1840 1841 1842 1843

	release_pages(pages, npages);
	kvfree(pages);
	sev->pages_locked -= npages;
}

static void sev_clflush_pages(struct page *pages[], unsigned long npages)
{
	uint8_t *page_virtual;
	unsigned long i;

	if (npages == 0 || pages == NULL)
		return;

	for (i = 0; i < npages; i++) {
		page_virtual = kmap_atomic(pages[i]);
		clflush_cache_range(page_virtual, PAGE_SIZE);
		kunmap_atomic(page_virtual);
	}
}

1844 1845 1846 1847 1848 1849 1850 1851 1852 1853 1854 1855 1856 1857 1858 1859
static void __unregister_enc_region_locked(struct kvm *kvm,
					   struct enc_region *region)
{
	/*
	 * The guest may change the memory encryption attribute from C=0 -> C=1
	 * or vice versa for this memory range. Lets make sure caches are
	 * flushed to ensure that guest data gets written into memory with
	 * correct C-bit.
	 */
	sev_clflush_pages(region->pages, region->npages);

	sev_unpin_memory(kvm, region->pages, region->npages);
	list_del(&region->list);
	kfree(region);
}

1860 1861
static struct kvm *svm_vm_alloc(void)
{
1862
	struct kvm_svm *kvm_svm = vzalloc(sizeof(struct kvm_svm));
1863
	return &kvm_svm->kvm;
1864 1865 1866 1867
}

static void svm_vm_free(struct kvm *kvm)
{
1868
	vfree(to_kvm_svm(kvm));
1869 1870
}

B
Brijesh Singh 已提交
1871 1872
static void sev_vm_destroy(struct kvm *kvm)
{
1873
	struct kvm_sev_info *sev = &to_kvm_svm(kvm)->sev_info;
1874 1875
	struct list_head *head = &sev->regions_list;
	struct list_head *pos, *q;
1876

B
Brijesh Singh 已提交
1877 1878 1879
	if (!sev_guest(kvm))
		return;

1880 1881 1882 1883 1884 1885 1886 1887 1888 1889 1890 1891 1892 1893 1894
	mutex_lock(&kvm->lock);

	/*
	 * if userspace was terminated before unregistering the memory regions
	 * then lets unpin all the registered memory.
	 */
	if (!list_empty(head)) {
		list_for_each_safe(pos, q, head) {
			__unregister_enc_region_locked(kvm,
				list_entry(pos, struct enc_region, list));
		}
	}

	mutex_unlock(&kvm->lock);

1895
	sev_unbind_asid(kvm, sev->handle);
B
Brijesh Singh 已提交
1896 1897 1898
	sev_asid_free(kvm);
}

1899 1900
static void avic_vm_destroy(struct kvm *kvm)
{
1901
	unsigned long flags;
1902
	struct kvm_svm *kvm_svm = to_kvm_svm(kvm);
1903

1904 1905 1906
	if (!avic)
		return;

1907 1908 1909 1910
	if (kvm_svm->avic_logical_id_table_page)
		__free_page(kvm_svm->avic_logical_id_table_page);
	if (kvm_svm->avic_physical_id_table_page)
		__free_page(kvm_svm->avic_physical_id_table_page);
1911 1912

	spin_lock_irqsave(&svm_vm_data_hash_lock, flags);
1913
	hash_del(&kvm_svm->hnode);
1914
	spin_unlock_irqrestore(&svm_vm_data_hash_lock, flags);
1915 1916
}

B
Brijesh Singh 已提交
1917 1918 1919 1920 1921 1922
static void svm_vm_destroy(struct kvm *kvm)
{
	avic_vm_destroy(kvm);
	sev_vm_destroy(kvm);
}

1923 1924
static int avic_vm_init(struct kvm *kvm)
{
1925
	unsigned long flags;
1926
	int err = -ENOMEM;
1927 1928
	struct kvm_svm *kvm_svm = to_kvm_svm(kvm);
	struct kvm_svm *k2;
1929 1930
	struct page *p_page;
	struct page *l_page;
1931
	u32 vm_id;
1932 1933 1934 1935 1936 1937 1938 1939 1940

	if (!avic)
		return 0;

	/* Allocating physical APIC ID table (4KB) */
	p_page = alloc_page(GFP_KERNEL);
	if (!p_page)
		goto free_avic;

1941
	kvm_svm->avic_physical_id_table_page = p_page;
1942 1943 1944 1945 1946 1947 1948
	clear_page(page_address(p_page));

	/* Allocating logical APIC ID table (4KB) */
	l_page = alloc_page(GFP_KERNEL);
	if (!l_page)
		goto free_avic;

1949
	kvm_svm->avic_logical_id_table_page = l_page;
1950 1951
	clear_page(page_address(l_page));

1952
	spin_lock_irqsave(&svm_vm_data_hash_lock, flags);
1953 1954 1955 1956 1957 1958 1959 1960
 again:
	vm_id = next_vm_id = (next_vm_id + 1) & AVIC_VM_ID_MASK;
	if (vm_id == 0) { /* id is 1-based, zero is not okay */
		next_vm_id_wrapped = 1;
		goto again;
	}
	/* Is it still in use? Only possible if wrapped at least once */
	if (next_vm_id_wrapped) {
1961 1962
		hash_for_each_possible(svm_vm_data_hash, k2, hnode, vm_id) {
			if (k2->avic_vm_id == vm_id)
1963 1964 1965
				goto again;
		}
	}
1966 1967
	kvm_svm->avic_vm_id = vm_id;
	hash_add(svm_vm_data_hash, &kvm_svm->hnode, kvm_svm->avic_vm_id);
1968 1969
	spin_unlock_irqrestore(&svm_vm_data_hash_lock, flags);

1970 1971 1972 1973 1974
	return 0;

free_avic:
	avic_vm_destroy(kvm);
	return err;
A
Avi Kivity 已提交
1975 1976
}

1977 1978
static inline int
avic_update_iommu_vcpu_affinity(struct kvm_vcpu *vcpu, int cpu, bool r)
1979
{
1980 1981 1982
	int ret = 0;
	unsigned long flags;
	struct amd_svm_iommu_ir *ir;
1983 1984
	struct vcpu_svm *svm = to_svm(vcpu);

1985 1986
	if (!kvm_arch_has_assigned_device(vcpu->kvm))
		return 0;
1987

1988 1989 1990 1991 1992
	/*
	 * Here, we go through the per-vcpu ir_list to update all existing
	 * interrupt remapping table entry targeting this vcpu.
	 */
	spin_lock_irqsave(&svm->ir_list_lock, flags);
1993

1994 1995
	if (list_empty(&svm->ir_list))
		goto out;
1996

1997 1998 1999 2000 2001 2002 2003 2004
	list_for_each_entry(ir, &svm->ir_list, node) {
		ret = amd_iommu_update_ga(cpu, r, ir->data);
		if (ret)
			break;
	}
out:
	spin_unlock_irqrestore(&svm->ir_list_lock, flags);
	return ret;
2005 2006 2007 2008 2009 2010
}

static void avic_vcpu_load(struct kvm_vcpu *vcpu, int cpu)
{
	u64 entry;
	/* ID = 0xff (broadcast), ID > 0xff (reserved) */
2011
	int h_physical_id = kvm_cpu_get_apicid(cpu);
2012 2013 2014 2015 2016 2017 2018 2019 2020 2021 2022 2023 2024 2025 2026 2027 2028 2029 2030
	struct vcpu_svm *svm = to_svm(vcpu);

	if (!kvm_vcpu_apicv_active(vcpu))
		return;

	if (WARN_ON(h_physical_id >= AVIC_MAX_PHYSICAL_ID_COUNT))
		return;

	entry = READ_ONCE(*(svm->avic_physical_id_cache));
	WARN_ON(entry & AVIC_PHYSICAL_ID_ENTRY_IS_RUNNING_MASK);

	entry &= ~AVIC_PHYSICAL_ID_ENTRY_HOST_PHYSICAL_ID_MASK;
	entry |= (h_physical_id & AVIC_PHYSICAL_ID_ENTRY_HOST_PHYSICAL_ID_MASK);

	entry &= ~AVIC_PHYSICAL_ID_ENTRY_IS_RUNNING_MASK;
	if (svm->avic_is_running)
		entry |= AVIC_PHYSICAL_ID_ENTRY_IS_RUNNING_MASK;

	WRITE_ONCE(*(svm->avic_physical_id_cache), entry);
2031 2032
	avic_update_iommu_vcpu_affinity(vcpu, h_physical_id,
					svm->avic_is_running);
2033 2034 2035 2036 2037 2038 2039 2040 2041 2042 2043
}

static void avic_vcpu_put(struct kvm_vcpu *vcpu)
{
	u64 entry;
	struct vcpu_svm *svm = to_svm(vcpu);

	if (!kvm_vcpu_apicv_active(vcpu))
		return;

	entry = READ_ONCE(*(svm->avic_physical_id_cache));
2044 2045 2046
	if (entry & AVIC_PHYSICAL_ID_ENTRY_IS_RUNNING_MASK)
		avic_update_iommu_vcpu_affinity(vcpu, -1, 0);

2047 2048
	entry &= ~AVIC_PHYSICAL_ID_ENTRY_IS_RUNNING_MASK;
	WRITE_ONCE(*(svm->avic_physical_id_cache), entry);
A
Avi Kivity 已提交
2049 2050
}

2051 2052 2053 2054 2055 2056 2057 2058 2059 2060 2061 2062 2063 2064
/**
 * This function is called during VCPU halt/unhalt.
 */
static void avic_set_running(struct kvm_vcpu *vcpu, bool is_run)
{
	struct vcpu_svm *svm = to_svm(vcpu);

	svm->avic_is_running = is_run;
	if (is_run)
		avic_vcpu_load(vcpu, vcpu->cpu);
	else
		avic_vcpu_put(vcpu);
}

2065
static void svm_vcpu_reset(struct kvm_vcpu *vcpu, bool init_event)
2066 2067
{
	struct vcpu_svm *svm = to_svm(vcpu);
2068 2069
	u32 dummy;
	u32 eax = 1;
2070

2071
	vcpu->arch.microcode_version = 0x01000065;
2072
	svm->spec_ctrl = 0;
2073
	svm->virt_spec_ctrl = 0;
2074

2075 2076 2077 2078 2079 2080
	if (!init_event) {
		svm->vcpu.arch.apic_base = APIC_DEFAULT_PHYS_BASE |
					   MSR_IA32_APICBASE_ENABLE;
		if (kvm_vcpu_is_reset_bsp(&svm->vcpu))
			svm->vcpu.arch.apic_base |= MSR_IA32_APICBASE_BSP;
	}
P
Paolo Bonzini 已提交
2081
	init_vmcb(svm);
A
Avi Kivity 已提交
2082

2083
	kvm_cpuid(vcpu, &eax, &dummy, &dummy, &dummy, true);
2084
	kvm_register_write(vcpu, VCPU_REGS_RDX, eax);
2085 2086 2087

	if (kvm_vcpu_apicv_active(vcpu) && !init_event)
		avic_update_vapic_bar(svm, APIC_DEFAULT_PHYS_BASE);
2088 2089
}

2090 2091 2092 2093
static int avic_init_vcpu(struct vcpu_svm *svm)
{
	int ret;

2094
	if (!kvm_vcpu_apicv_active(&svm->vcpu))
2095 2096 2097 2098 2099 2100 2101 2102 2103 2104 2105 2106
		return 0;

	ret = avic_init_backing_page(&svm->vcpu);
	if (ret)
		return ret;

	INIT_LIST_HEAD(&svm->ir_list);
	spin_lock_init(&svm->ir_list_lock);

	return ret;
}

R
Rusty Russell 已提交
2107
static struct kvm_vcpu *svm_create_vcpu(struct kvm *kvm, unsigned int id)
A
Avi Kivity 已提交
2108
{
2109
	struct vcpu_svm *svm;
A
Avi Kivity 已提交
2110
	struct page *page;
2111
	struct page *msrpm_pages;
A
Alexander Graf 已提交
2112
	struct page *hsave_page;
A
Alexander Graf 已提交
2113
	struct page *nested_msrpm_pages;
R
Rusty Russell 已提交
2114
	int err;
A
Avi Kivity 已提交
2115

2116
	svm = kmem_cache_zalloc(kvm_vcpu_cache, GFP_KERNEL);
R
Rusty Russell 已提交
2117 2118 2119 2120 2121 2122 2123 2124 2125
	if (!svm) {
		err = -ENOMEM;
		goto out;
	}

	err = kvm_vcpu_init(&svm->vcpu, kvm, id);
	if (err)
		goto free_svm;

2126
	err = -ENOMEM;
A
Avi Kivity 已提交
2127
	page = alloc_page(GFP_KERNEL);
2128
	if (!page)
R
Rusty Russell 已提交
2129
		goto uninit;
A
Avi Kivity 已提交
2130

2131 2132
	msrpm_pages = alloc_pages(GFP_KERNEL, MSRPM_ALLOC_ORDER);
	if (!msrpm_pages)
2133
		goto free_page1;
A
Alexander Graf 已提交
2134 2135 2136

	nested_msrpm_pages = alloc_pages(GFP_KERNEL, MSRPM_ALLOC_ORDER);
	if (!nested_msrpm_pages)
2137
		goto free_page2;
2138

A
Alexander Graf 已提交
2139 2140
	hsave_page = alloc_page(GFP_KERNEL);
	if (!hsave_page)
2141 2142
		goto free_page3;

2143 2144 2145
	err = avic_init_vcpu(svm);
	if (err)
		goto free_page4;
2146

2147 2148 2149 2150 2151
	/* We initialize this flag to true to make sure that the is_running
	 * bit would be set the first time the vcpu is loaded.
	 */
	svm->avic_is_running = true;

2152
	svm->nested.hsave = page_address(hsave_page);
A
Alexander Graf 已提交
2153

2154 2155 2156
	svm->msrpm = page_address(msrpm_pages);
	svm_vcpu_init_msrpm(svm->msrpm);

2157
	svm->nested.msrpm = page_address(nested_msrpm_pages);
2158
	svm_vcpu_init_msrpm(svm->nested.msrpm);
A
Alexander Graf 已提交
2159

2160 2161
	svm->vmcb = page_address(page);
	clear_page(svm->vmcb);
2162
	svm->vmcb_pa = __sme_set(page_to_pfn(page) << PAGE_SHIFT);
2163
	svm->asid_generation = 0;
P
Paolo Bonzini 已提交
2164
	init_vmcb(svm);
A
Avi Kivity 已提交
2165

2166 2167
	svm_init_osvw(&svm->vcpu);

R
Rusty Russell 已提交
2168
	return &svm->vcpu;
2169

2170 2171
free_page4:
	__free_page(hsave_page);
2172 2173 2174 2175 2176 2177
free_page3:
	__free_pages(nested_msrpm_pages, MSRPM_ALLOC_ORDER);
free_page2:
	__free_pages(msrpm_pages, MSRPM_ALLOC_ORDER);
free_page1:
	__free_page(page);
R
Rusty Russell 已提交
2178 2179 2180
uninit:
	kvm_vcpu_uninit(&svm->vcpu);
free_svm:
2181
	kmem_cache_free(kvm_vcpu_cache, svm);
R
Rusty Russell 已提交
2182 2183
out:
	return ERR_PTR(err);
A
Avi Kivity 已提交
2184 2185 2186 2187
}

static void svm_free_vcpu(struct kvm_vcpu *vcpu)
{
2188 2189
	struct vcpu_svm *svm = to_svm(vcpu);

2190
	__free_page(pfn_to_page(__sme_clr(svm->vmcb_pa) >> PAGE_SHIFT));
2191
	__free_pages(virt_to_page(svm->msrpm), MSRPM_ALLOC_ORDER);
2192 2193
	__free_page(virt_to_page(svm->nested.hsave));
	__free_pages(virt_to_page(svm->nested.msrpm), MSRPM_ALLOC_ORDER);
R
Rusty Russell 已提交
2194
	kvm_vcpu_uninit(vcpu);
2195
	kmem_cache_free(kvm_vcpu_cache, svm);
A
Ashok Raj 已提交
2196 2197 2198 2199 2200
	/*
	 * The vmcb page can be recycled, causing a false negative in
	 * svm_vcpu_load(). So do a full IBPB now.
	 */
	indirect_branch_prediction_barrier();
A
Avi Kivity 已提交
2201 2202
}

2203
static void svm_vcpu_load(struct kvm_vcpu *vcpu, int cpu)
A
Avi Kivity 已提交
2204
{
2205
	struct vcpu_svm *svm = to_svm(vcpu);
A
Ashok Raj 已提交
2206
	struct svm_cpu_data *sd = per_cpu(svm_data, cpu);
2207
	int i;
2208 2209

	if (unlikely(cpu != vcpu->cpu)) {
2210
		svm->asid_generation = 0;
2211
		mark_all_dirty(svm->vmcb);
2212
	}
2213

2214 2215 2216
#ifdef CONFIG_X86_64
	rdmsrl(MSR_GS_BASE, to_svm(vcpu)->host.gs_base);
#endif
2217 2218 2219 2220
	savesegment(fs, svm->host.fs);
	savesegment(gs, svm->host.gs);
	svm->host.ldt = kvm_read_ldt();

2221
	for (i = 0; i < NR_HOST_SAVE_USER_MSRS; i++)
2222
		rdmsrl(host_save_user_msrs[i], svm->host_user_msrs[i]);
2223

2224 2225 2226 2227 2228 2229
	if (static_cpu_has(X86_FEATURE_TSCRATEMSR)) {
		u64 tsc_ratio = vcpu->arch.tsc_scaling_ratio;
		if (tsc_ratio != __this_cpu_read(current_tsc_ratio)) {
			__this_cpu_write(current_tsc_ratio, tsc_ratio);
			wrmsrl(MSR_AMD64_TSC_RATIO, tsc_ratio);
		}
2230
	}
P
Paolo Bonzini 已提交
2231 2232 2233
	/* This assumes that the kernel never uses MSR_TSC_AUX */
	if (static_cpu_has(X86_FEATURE_RDTSCP))
		wrmsrl(MSR_TSC_AUX, svm->tsc_aux);
2234

A
Ashok Raj 已提交
2235 2236 2237 2238
	if (sd->current_vmcb != svm->vmcb) {
		sd->current_vmcb = svm->vmcb;
		indirect_branch_prediction_barrier();
	}
2239
	avic_vcpu_load(vcpu, cpu);
A
Avi Kivity 已提交
2240 2241 2242 2243
}

static void svm_vcpu_put(struct kvm_vcpu *vcpu)
{
2244
	struct vcpu_svm *svm = to_svm(vcpu);
2245 2246
	int i;

2247 2248
	avic_vcpu_put(vcpu);

2249
	++vcpu->stat.host_state_reload;
2250 2251 2252
	kvm_load_ldt(svm->host.ldt);
#ifdef CONFIG_X86_64
	loadsegment(fs, svm->host.fs);
2253
	wrmsrl(MSR_KERNEL_GS_BASE, current->thread.gsbase);
2254
	load_gs_index(svm->host.gs);
2255
#else
2256
#ifdef CONFIG_X86_32_LAZY_GS
2257
	loadsegment(gs, svm->host.gs);
2258
#endif
2259
#endif
2260
	for (i = 0; i < NR_HOST_SAVE_USER_MSRS; i++)
2261
		wrmsrl(host_save_user_msrs[i], svm->host_user_msrs[i]);
A
Avi Kivity 已提交
2262 2263
}

2264 2265 2266 2267 2268 2269 2270 2271 2272 2273
static void svm_vcpu_blocking(struct kvm_vcpu *vcpu)
{
	avic_set_running(vcpu, false);
}

static void svm_vcpu_unblocking(struct kvm_vcpu *vcpu)
{
	avic_set_running(vcpu, true);
}

A
Avi Kivity 已提交
2274 2275
static unsigned long svm_get_rflags(struct kvm_vcpu *vcpu)
{
2276 2277 2278 2279 2280 2281 2282 2283 2284 2285 2286
	struct vcpu_svm *svm = to_svm(vcpu);
	unsigned long rflags = svm->vmcb->save.rflags;

	if (svm->nmi_singlestep) {
		/* Hide our flags if they were not set by the guest */
		if (!(svm->nmi_singlestep_guest_rflags & X86_EFLAGS_TF))
			rflags &= ~X86_EFLAGS_TF;
		if (!(svm->nmi_singlestep_guest_rflags & X86_EFLAGS_RF))
			rflags &= ~X86_EFLAGS_RF;
	}
	return rflags;
A
Avi Kivity 已提交
2287 2288 2289 2290
}

static void svm_set_rflags(struct kvm_vcpu *vcpu, unsigned long rflags)
{
2291 2292 2293
	if (to_svm(vcpu)->nmi_singlestep)
		rflags |= (X86_EFLAGS_TF | X86_EFLAGS_RF);

P
Paolo Bonzini 已提交
2294
       /*
A
Andrea Gelmini 已提交
2295
        * Any change of EFLAGS.VM is accompanied by a reload of SS
P
Paolo Bonzini 已提交
2296 2297 2298
        * (caused by either a task switch or an inter-privilege IRET),
        * so we do not need to update the CPL here.
        */
2299
	to_svm(vcpu)->vmcb->save.rflags = rflags;
A
Avi Kivity 已提交
2300 2301
}

A
Avi Kivity 已提交
2302 2303 2304 2305 2306
static void svm_cache_reg(struct kvm_vcpu *vcpu, enum kvm_reg reg)
{
	switch (reg) {
	case VCPU_EXREG_PDPTR:
		BUG_ON(!npt_enabled);
2307
		load_pdptrs(vcpu, vcpu->arch.walk_mmu, kvm_read_cr3(vcpu));
A
Avi Kivity 已提交
2308 2309 2310 2311 2312 2313
		break;
	default:
		BUG();
	}
}

2314 2315
static void svm_set_vintr(struct vcpu_svm *svm)
{
2316
	set_intercept(svm, INTERCEPT_VINTR);
2317 2318 2319 2320
}

static void svm_clear_vintr(struct vcpu_svm *svm)
{
2321
	clr_intercept(svm, INTERCEPT_VINTR);
2322 2323
}

A
Avi Kivity 已提交
2324 2325
static struct vmcb_seg *svm_seg(struct kvm_vcpu *vcpu, int seg)
{
2326
	struct vmcb_save_area *save = &to_svm(vcpu)->vmcb->save;
A
Avi Kivity 已提交
2327 2328 2329 2330 2331 2332 2333 2334 2335 2336 2337 2338

	switch (seg) {
	case VCPU_SREG_CS: return &save->cs;
	case VCPU_SREG_DS: return &save->ds;
	case VCPU_SREG_ES: return &save->es;
	case VCPU_SREG_FS: return &save->fs;
	case VCPU_SREG_GS: return &save->gs;
	case VCPU_SREG_SS: return &save->ss;
	case VCPU_SREG_TR: return &save->tr;
	case VCPU_SREG_LDTR: return &save->ldtr;
	}
	BUG();
A
Al Viro 已提交
2339
	return NULL;
A
Avi Kivity 已提交
2340 2341 2342 2343 2344 2345 2346 2347 2348 2349 2350 2351 2352 2353 2354 2355 2356 2357 2358 2359 2360 2361 2362 2363
}

static u64 svm_get_segment_base(struct kvm_vcpu *vcpu, int seg)
{
	struct vmcb_seg *s = svm_seg(vcpu, seg);

	return s->base;
}

static void svm_get_segment(struct kvm_vcpu *vcpu,
			    struct kvm_segment *var, int seg)
{
	struct vmcb_seg *s = svm_seg(vcpu, seg);

	var->base = s->base;
	var->limit = s->limit;
	var->selector = s->selector;
	var->type = s->attrib & SVM_SELECTOR_TYPE_MASK;
	var->s = (s->attrib >> SVM_SELECTOR_S_SHIFT) & 1;
	var->dpl = (s->attrib >> SVM_SELECTOR_DPL_SHIFT) & 3;
	var->present = (s->attrib >> SVM_SELECTOR_P_SHIFT) & 1;
	var->avl = (s->attrib >> SVM_SELECTOR_AVL_SHIFT) & 1;
	var->l = (s->attrib >> SVM_SELECTOR_L_SHIFT) & 1;
	var->db = (s->attrib >> SVM_SELECTOR_DB_SHIFT) & 1;
2364 2365 2366 2367 2368 2369 2370 2371 2372 2373

	/*
	 * AMD CPUs circa 2014 track the G bit for all segments except CS.
	 * However, the SVM spec states that the G bit is not observed by the
	 * CPU, and some VMware virtual CPUs drop the G bit for all segments.
	 * So let's synthesize a legal G bit for all segments, this helps
	 * running KVM nested. It also helps cross-vendor migration, because
	 * Intel's vmentry has a check on the 'G' bit.
	 */
	var->g = s->limit > 0xfffff;
2374

J
Joerg Roedel 已提交
2375 2376
	/*
	 * AMD's VMCB does not have an explicit unusable field, so emulate it
2377 2378
	 * for cross vendor migration purposes by "not present"
	 */
2379
	var->unusable = !var->present;
2380

2381 2382 2383 2384 2385 2386
	switch (seg) {
	case VCPU_SREG_TR:
		/*
		 * Work around a bug where the busy flag in the tr selector
		 * isn't exposed
		 */
2387
		var->type |= 0x2;
2388 2389 2390 2391 2392 2393 2394 2395 2396 2397 2398 2399 2400 2401 2402
		break;
	case VCPU_SREG_DS:
	case VCPU_SREG_ES:
	case VCPU_SREG_FS:
	case VCPU_SREG_GS:
		/*
		 * The accessed bit must always be set in the segment
		 * descriptor cache, although it can be cleared in the
		 * descriptor, the cached bit always remains at 1. Since
		 * Intel has a check on this, set it here to support
		 * cross-vendor migration.
		 */
		if (!var->unusable)
			var->type |= 0x1;
		break;
2403
	case VCPU_SREG_SS:
J
Joerg Roedel 已提交
2404 2405
		/*
		 * On AMD CPUs sometimes the DB bit in the segment
2406 2407 2408 2409 2410 2411
		 * descriptor is left as 1, although the whole segment has
		 * been made unusable. Clear it here to pass an Intel VMX
		 * entry check when cross vendor migrating.
		 */
		if (var->unusable)
			var->db = 0;
2412
		/* This is symmetric with svm_set_segment() */
J
Jan Kiszka 已提交
2413
		var->dpl = to_svm(vcpu)->vmcb->save.cpl;
2414
		break;
2415
	}
A
Avi Kivity 已提交
2416 2417
}

2418 2419 2420 2421 2422 2423 2424
static int svm_get_cpl(struct kvm_vcpu *vcpu)
{
	struct vmcb_save_area *save = &to_svm(vcpu)->vmcb->save;

	return save->cpl;
}

2425
static void svm_get_idt(struct kvm_vcpu *vcpu, struct desc_ptr *dt)
A
Avi Kivity 已提交
2426
{
2427 2428
	struct vcpu_svm *svm = to_svm(vcpu);

2429 2430
	dt->size = svm->vmcb->save.idtr.limit;
	dt->address = svm->vmcb->save.idtr.base;
A
Avi Kivity 已提交
2431 2432
}

2433
static void svm_set_idt(struct kvm_vcpu *vcpu, struct desc_ptr *dt)
A
Avi Kivity 已提交
2434
{
2435 2436
	struct vcpu_svm *svm = to_svm(vcpu);

2437 2438
	svm->vmcb->save.idtr.limit = dt->size;
	svm->vmcb->save.idtr.base = dt->address ;
2439
	mark_dirty(svm->vmcb, VMCB_DT);
A
Avi Kivity 已提交
2440 2441
}

2442
static void svm_get_gdt(struct kvm_vcpu *vcpu, struct desc_ptr *dt)
A
Avi Kivity 已提交
2443
{
2444 2445
	struct vcpu_svm *svm = to_svm(vcpu);

2446 2447
	dt->size = svm->vmcb->save.gdtr.limit;
	dt->address = svm->vmcb->save.gdtr.base;
A
Avi Kivity 已提交
2448 2449
}

2450
static void svm_set_gdt(struct kvm_vcpu *vcpu, struct desc_ptr *dt)
A
Avi Kivity 已提交
2451
{
2452 2453
	struct vcpu_svm *svm = to_svm(vcpu);

2454 2455
	svm->vmcb->save.gdtr.limit = dt->size;
	svm->vmcb->save.gdtr.base = dt->address ;
2456
	mark_dirty(svm->vmcb, VMCB_DT);
A
Avi Kivity 已提交
2457 2458
}

2459 2460 2461 2462
static void svm_decache_cr0_guest_bits(struct kvm_vcpu *vcpu)
{
}

2463 2464 2465 2466
static void svm_decache_cr3(struct kvm_vcpu *vcpu)
{
}

2467
static void svm_decache_cr4_guest_bits(struct kvm_vcpu *vcpu)
2468 2469 2470
{
}

A
Avi Kivity 已提交
2471 2472 2473 2474 2475
static void update_cr0_intercept(struct vcpu_svm *svm)
{
	ulong gcr0 = svm->vcpu.arch.cr0;
	u64 *hcr0 = &svm->vmcb->save.cr0;

2476 2477
	*hcr0 = (*hcr0 & ~SVM_CR0_SELECTIVE_MASK)
		| (gcr0 & SVM_CR0_SELECTIVE_MASK);
A
Avi Kivity 已提交
2478

2479
	mark_dirty(svm->vmcb, VMCB_CR);
A
Avi Kivity 已提交
2480

2481
	if (gcr0 == *hcr0) {
2482 2483
		clr_cr_intercept(svm, INTERCEPT_CR0_READ);
		clr_cr_intercept(svm, INTERCEPT_CR0_WRITE);
A
Avi Kivity 已提交
2484
	} else {
2485 2486
		set_cr_intercept(svm, INTERCEPT_CR0_READ);
		set_cr_intercept(svm, INTERCEPT_CR0_WRITE);
A
Avi Kivity 已提交
2487 2488 2489
	}
}

A
Avi Kivity 已提交
2490 2491
static void svm_set_cr0(struct kvm_vcpu *vcpu, unsigned long cr0)
{
2492 2493
	struct vcpu_svm *svm = to_svm(vcpu);

2494
#ifdef CONFIG_X86_64
2495
	if (vcpu->arch.efer & EFER_LME) {
2496
		if (!is_paging(vcpu) && (cr0 & X86_CR0_PG)) {
2497
			vcpu->arch.efer |= EFER_LMA;
2498
			svm->vmcb->save.efer |= EFER_LMA | EFER_LME;
A
Avi Kivity 已提交
2499 2500
		}

M
Mike Day 已提交
2501
		if (is_paging(vcpu) && !(cr0 & X86_CR0_PG)) {
2502
			vcpu->arch.efer &= ~EFER_LMA;
2503
			svm->vmcb->save.efer &= ~(EFER_LMA | EFER_LME);
A
Avi Kivity 已提交
2504 2505 2506
		}
	}
#endif
2507
	vcpu->arch.cr0 = cr0;
2508 2509 2510

	if (!npt_enabled)
		cr0 |= X86_CR0_PG | X86_CR0_WP;
2511

2512 2513 2514 2515 2516 2517 2518
	/*
	 * re-enable caching here because the QEMU bios
	 * does not do it - this results in some delay at
	 * reboot
	 */
	if (kvm_check_has_quirk(vcpu->kvm, KVM_X86_QUIRK_CD_NW_CLEARED))
		cr0 &= ~(X86_CR0_CD | X86_CR0_NW);
2519
	svm->vmcb->save.cr0 = cr0;
2520
	mark_dirty(svm->vmcb, VMCB_CR);
A
Avi Kivity 已提交
2521
	update_cr0_intercept(svm);
A
Avi Kivity 已提交
2522 2523
}

2524
static int svm_set_cr4(struct kvm_vcpu *vcpu, unsigned long cr4)
A
Avi Kivity 已提交
2525
{
2526
	unsigned long host_cr4_mce = cr4_read_shadow() & X86_CR4_MCE;
2527 2528
	unsigned long old_cr4 = to_svm(vcpu)->vmcb->save.cr4;

2529 2530 2531
	if (cr4 & X86_CR4_VMXE)
		return 1;

2532
	if (npt_enabled && ((old_cr4 ^ cr4) & X86_CR4_PGE))
2533
		svm_flush_tlb(vcpu, true);
2534

2535 2536 2537
	vcpu->arch.cr4 = cr4;
	if (!npt_enabled)
		cr4 |= X86_CR4_PAE;
2538
	cr4 |= host_cr4_mce;
2539
	to_svm(vcpu)->vmcb->save.cr4 = cr4;
2540
	mark_dirty(to_svm(vcpu)->vmcb, VMCB_CR);
2541
	return 0;
A
Avi Kivity 已提交
2542 2543 2544 2545 2546
}

static void svm_set_segment(struct kvm_vcpu *vcpu,
			    struct kvm_segment *var, int seg)
{
2547
	struct vcpu_svm *svm = to_svm(vcpu);
A
Avi Kivity 已提交
2548 2549 2550 2551 2552
	struct vmcb_seg *s = svm_seg(vcpu, seg);

	s->base = var->base;
	s->limit = var->limit;
	s->selector = var->selector;
2553 2554 2555 2556 2557 2558 2559 2560
	s->attrib = (var->type & SVM_SELECTOR_TYPE_MASK);
	s->attrib |= (var->s & 1) << SVM_SELECTOR_S_SHIFT;
	s->attrib |= (var->dpl & 3) << SVM_SELECTOR_DPL_SHIFT;
	s->attrib |= ((var->present & 1) && !var->unusable) << SVM_SELECTOR_P_SHIFT;
	s->attrib |= (var->avl & 1) << SVM_SELECTOR_AVL_SHIFT;
	s->attrib |= (var->l & 1) << SVM_SELECTOR_L_SHIFT;
	s->attrib |= (var->db & 1) << SVM_SELECTOR_DB_SHIFT;
	s->attrib |= (var->g & 1) << SVM_SELECTOR_G_SHIFT;
P
Paolo Bonzini 已提交
2561 2562 2563 2564 2565 2566 2567 2568

	/*
	 * This is always accurate, except if SYSRET returned to a segment
	 * with SS.DPL != 3.  Intel does not have this quirk, and always
	 * forces SS.DPL to 3 on sysret, so we ignore that case; fixing it
	 * would entail passing the CPL to userspace and back.
	 */
	if (seg == VCPU_SREG_SS)
2569 2570
		/* This is symmetric with svm_get_segment() */
		svm->vmcb->save.cpl = (var->dpl & 3);
A
Avi Kivity 已提交
2571

2572
	mark_dirty(svm->vmcb, VMCB_SEG);
A
Avi Kivity 已提交
2573 2574
}

2575
static void update_bp_intercept(struct kvm_vcpu *vcpu)
A
Avi Kivity 已提交
2576
{
J
Jan Kiszka 已提交
2577 2578
	struct vcpu_svm *svm = to_svm(vcpu);

2579
	clr_exception_intercept(svm, BP_VECTOR);
2580

J
Jan Kiszka 已提交
2581 2582
	if (vcpu->guest_debug & KVM_GUESTDBG_ENABLE) {
		if (vcpu->guest_debug & KVM_GUESTDBG_USE_SW_BP)
2583
			set_exception_intercept(svm, BP_VECTOR);
J
Jan Kiszka 已提交
2584 2585
	} else
		vcpu->guest_debug = 0;
2586 2587
}

2588
static void new_asid(struct vcpu_svm *svm, struct svm_cpu_data *sd)
A
Avi Kivity 已提交
2589
{
2590 2591
	if (sd->next_asid > sd->max_asid) {
		++sd->asid_generation;
2592
		sd->next_asid = sd->min_asid;
2593
		svm->vmcb->control.tlb_ctl = TLB_CONTROL_FLUSH_ALL_ASID;
A
Avi Kivity 已提交
2594 2595
	}

2596 2597
	svm->asid_generation = sd->asid_generation;
	svm->vmcb->control.asid = sd->next_asid++;
2598 2599

	mark_dirty(svm->vmcb, VMCB_ASID);
A
Avi Kivity 已提交
2600 2601
}

J
Jan Kiszka 已提交
2602 2603 2604 2605 2606 2607 2608 2609 2610 2611 2612 2613 2614
static u64 svm_get_dr6(struct kvm_vcpu *vcpu)
{
	return to_svm(vcpu)->vmcb->save.dr6;
}

static void svm_set_dr6(struct kvm_vcpu *vcpu, unsigned long value)
{
	struct vcpu_svm *svm = to_svm(vcpu);

	svm->vmcb->save.dr6 = value;
	mark_dirty(svm->vmcb, VMCB_DR);
}

2615 2616 2617 2618 2619 2620 2621 2622 2623 2624 2625 2626 2627 2628 2629
static void svm_sync_dirty_debug_regs(struct kvm_vcpu *vcpu)
{
	struct vcpu_svm *svm = to_svm(vcpu);

	get_debugreg(vcpu->arch.db[0], 0);
	get_debugreg(vcpu->arch.db[1], 1);
	get_debugreg(vcpu->arch.db[2], 2);
	get_debugreg(vcpu->arch.db[3], 3);
	vcpu->arch.dr6 = svm_get_dr6(vcpu);
	vcpu->arch.dr7 = svm->vmcb->save.dr7;

	vcpu->arch.switch_db_regs &= ~KVM_DEBUGREG_WONT_EXIT;
	set_dr_intercepts(svm);
}

2630
static void svm_set_dr7(struct kvm_vcpu *vcpu, unsigned long value)
A
Avi Kivity 已提交
2631
{
2632 2633
	struct vcpu_svm *svm = to_svm(vcpu);

2634
	svm->vmcb->save.dr7 = value;
2635
	mark_dirty(svm->vmcb, VMCB_DR);
A
Avi Kivity 已提交
2636 2637
}

A
Avi Kivity 已提交
2638
static int pf_interception(struct vcpu_svm *svm)
A
Avi Kivity 已提交
2639
{
2640
	u64 fault_address = __sme_clr(svm->vmcb->control.exit_info_2);
2641
	u64 error_code = svm->vmcb->control.exit_info_1;
A
Avi Kivity 已提交
2642

2643
	return kvm_handle_page_fault(&svm->vcpu, error_code, fault_address,
2644 2645
			static_cpu_has(X86_FEATURE_DECODEASSISTS) ?
			svm->vmcb->control.insn_bytes : NULL,
2646 2647 2648 2649 2650
			svm->vmcb->control.insn_len);
}

static int npf_interception(struct vcpu_svm *svm)
{
2651
	u64 fault_address = __sme_clr(svm->vmcb->control.exit_info_2);
2652 2653 2654 2655
	u64 error_code = svm->vmcb->control.exit_info_1;

	trace_kvm_page_fault(fault_address, error_code);
	return kvm_mmu_page_fault(&svm->vcpu, fault_address, error_code,
2656 2657
			static_cpu_has(X86_FEATURE_DECODEASSISTS) ?
			svm->vmcb->control.insn_bytes : NULL,
2658
			svm->vmcb->control.insn_len);
A
Avi Kivity 已提交
2659 2660
}

A
Avi Kivity 已提交
2661
static int db_interception(struct vcpu_svm *svm)
J
Jan Kiszka 已提交
2662
{
A
Avi Kivity 已提交
2663 2664
	struct kvm_run *kvm_run = svm->vcpu.run;

J
Jan Kiszka 已提交
2665
	if (!(svm->vcpu.guest_debug &
2666
	      (KVM_GUESTDBG_SINGLESTEP | KVM_GUESTDBG_USE_HW_BP)) &&
J
Jan Kiszka 已提交
2667
		!svm->nmi_singlestep) {
J
Jan Kiszka 已提交
2668 2669 2670
		kvm_queue_exception(&svm->vcpu, DB_VECTOR);
		return 1;
	}
2671

J
Jan Kiszka 已提交
2672
	if (svm->nmi_singlestep) {
2673
		disable_nmi_singlestep(svm);
2674 2675 2676
	}

	if (svm->vcpu.guest_debug &
J
Joerg Roedel 已提交
2677
	    (KVM_GUESTDBG_SINGLESTEP | KVM_GUESTDBG_USE_HW_BP)) {
2678 2679 2680 2681 2682 2683 2684 2685
		kvm_run->exit_reason = KVM_EXIT_DEBUG;
		kvm_run->debug.arch.pc =
			svm->vmcb->save.cs.base + svm->vmcb->save.rip;
		kvm_run->debug.arch.exception = DB_VECTOR;
		return 0;
	}

	return 1;
J
Jan Kiszka 已提交
2686 2687
}

A
Avi Kivity 已提交
2688
static int bp_interception(struct vcpu_svm *svm)
J
Jan Kiszka 已提交
2689
{
A
Avi Kivity 已提交
2690 2691
	struct kvm_run *kvm_run = svm->vcpu.run;

J
Jan Kiszka 已提交
2692 2693 2694 2695 2696 2697
	kvm_run->exit_reason = KVM_EXIT_DEBUG;
	kvm_run->debug.arch.pc = svm->vmcb->save.cs.base + svm->vmcb->save.rip;
	kvm_run->debug.arch.exception = BP_VECTOR;
	return 0;
}

A
Avi Kivity 已提交
2698
static int ud_interception(struct vcpu_svm *svm)
2699
{
W
Wanpeng Li 已提交
2700
	return handle_ud(&svm->vcpu);
2701 2702
}

2703 2704 2705 2706 2707 2708
static int ac_interception(struct vcpu_svm *svm)
{
	kvm_queue_exception_e(&svm->vcpu, AC_VECTOR, 0);
	return 1;
}

2709 2710 2711 2712 2713 2714 2715 2716
static int gp_interception(struct vcpu_svm *svm)
{
	struct kvm_vcpu *vcpu = &svm->vcpu;
	u32 error_code = svm->vmcb->control.exit_info_1;
	int er;

	WARN_ON_ONCE(!enable_vmware_backdoor);

2717
	er = kvm_emulate_instruction(vcpu,
2718 2719 2720 2721 2722 2723 2724 2725
		EMULTYPE_VMWARE | EMULTYPE_NO_UD_ON_FAIL);
	if (er == EMULATE_USER_EXIT)
		return 0;
	else if (er != EMULATE_DONE)
		kvm_queue_exception_e(vcpu, GP_VECTOR, error_code);
	return 1;
}

2726 2727 2728 2729 2730 2731 2732 2733 2734 2735 2736 2737 2738 2739 2740 2741 2742 2743 2744 2745 2746 2747 2748 2749 2750 2751 2752 2753 2754 2755 2756 2757 2758 2759 2760 2761 2762 2763 2764
static bool is_erratum_383(void)
{
	int err, i;
	u64 value;

	if (!erratum_383_found)
		return false;

	value = native_read_msr_safe(MSR_IA32_MC0_STATUS, &err);
	if (err)
		return false;

	/* Bit 62 may or may not be set for this mce */
	value &= ~(1ULL << 62);

	if (value != 0xb600000000010015ULL)
		return false;

	/* Clear MCi_STATUS registers */
	for (i = 0; i < 6; ++i)
		native_write_msr_safe(MSR_IA32_MCx_STATUS(i), 0, 0);

	value = native_read_msr_safe(MSR_IA32_MCG_STATUS, &err);
	if (!err) {
		u32 low, high;

		value &= ~(1ULL << 2);
		low    = lower_32_bits(value);
		high   = upper_32_bits(value);

		native_write_msr_safe(MSR_IA32_MCG_STATUS, low, high);
	}

	/* Flush tlb to evict multi-match entries */
	__flush_tlb_all();

	return true;
}

2765
static void svm_handle_mce(struct vcpu_svm *svm)
2766
{
2767 2768 2769 2770 2771 2772 2773
	if (is_erratum_383()) {
		/*
		 * Erratum 383 triggered. Guest state is corrupt so kill the
		 * guest.
		 */
		pr_err("KVM: Guest triggered AMD Erratum 383\n");

2774
		kvm_make_request(KVM_REQ_TRIPLE_FAULT, &svm->vcpu);
2775 2776 2777 2778

		return;
	}

2779 2780 2781 2782 2783 2784 2785 2786
	/*
	 * On an #MC intercept the MCE handler is not called automatically in
	 * the host. So do it by hand here.
	 */
	asm volatile (
		"int $0x12\n");
	/* not sure if we ever come back to this point */

2787 2788 2789 2790 2791
	return;
}

static int mc_interception(struct vcpu_svm *svm)
{
2792 2793 2794
	return 1;
}

A
Avi Kivity 已提交
2795
static int shutdown_interception(struct vcpu_svm *svm)
2796
{
A
Avi Kivity 已提交
2797 2798
	struct kvm_run *kvm_run = svm->vcpu.run;

2799 2800 2801 2802
	/*
	 * VMCB is undefined after a SHUTDOWN intercept
	 * so reinitialize it.
	 */
2803
	clear_page(svm->vmcb);
P
Paolo Bonzini 已提交
2804
	init_vmcb(svm);
2805 2806 2807 2808 2809

	kvm_run->exit_reason = KVM_EXIT_SHUTDOWN;
	return 0;
}

A
Avi Kivity 已提交
2810
static int io_interception(struct vcpu_svm *svm)
A
Avi Kivity 已提交
2811
{
2812
	struct kvm_vcpu *vcpu = &svm->vcpu;
M
Mike Day 已提交
2813
	u32 io_info = svm->vmcb->control.exit_info_1; /* address size bug? */
2814
	int size, in, string;
2815
	unsigned port;
A
Avi Kivity 已提交
2816

R
Rusty Russell 已提交
2817
	++svm->vcpu.stat.io_exits;
2818
	string = (io_info & SVM_IOIO_STR_MASK) != 0;
2819
	in = (io_info & SVM_IOIO_TYPE_MASK) != 0;
2820
	if (string)
2821
		return kvm_emulate_instruction(vcpu, 0) == EMULATE_DONE;
2822

2823 2824
	port = io_info >> 16;
	size = (io_info & SVM_IOIO_SIZE_MASK) >> SVM_IOIO_SIZE_SHIFT;
2825 2826
	svm->next_rip = svm->vmcb->control.exit_info_2;

2827
	return kvm_fast_pio(&svm->vcpu, size, port, in);
A
Avi Kivity 已提交
2828 2829
}

A
Avi Kivity 已提交
2830
static int nmi_interception(struct vcpu_svm *svm)
2831 2832 2833 2834
{
	return 1;
}

A
Avi Kivity 已提交
2835
static int intr_interception(struct vcpu_svm *svm)
2836 2837 2838 2839 2840
{
	++svm->vcpu.stat.irq_exits;
	return 1;
}

A
Avi Kivity 已提交
2841
static int nop_on_interception(struct vcpu_svm *svm)
A
Avi Kivity 已提交
2842 2843 2844 2845
{
	return 1;
}

A
Avi Kivity 已提交
2846
static int halt_interception(struct vcpu_svm *svm)
A
Avi Kivity 已提交
2847
{
2848
	svm->next_rip = kvm_rip_read(&svm->vcpu) + 1;
R
Rusty Russell 已提交
2849
	return kvm_emulate_halt(&svm->vcpu);
A
Avi Kivity 已提交
2850 2851
}

A
Avi Kivity 已提交
2852
static int vmmcall_interception(struct vcpu_svm *svm)
2853
{
2854
	svm->next_rip = kvm_rip_read(&svm->vcpu) + 3;
2855
	return kvm_emulate_hypercall(&svm->vcpu);
2856 2857
}

2858 2859 2860 2861 2862 2863 2864
static unsigned long nested_svm_get_tdp_cr3(struct kvm_vcpu *vcpu)
{
	struct vcpu_svm *svm = to_svm(vcpu);

	return svm->nested.nested_cr3;
}

2865 2866 2867 2868 2869 2870 2871
static u64 nested_svm_get_tdp_pdptr(struct kvm_vcpu *vcpu, int index)
{
	struct vcpu_svm *svm = to_svm(vcpu);
	u64 cr3 = svm->nested.nested_cr3;
	u64 pdpte;
	int ret;

2872
	ret = kvm_vcpu_read_guest_page(vcpu, gpa_to_gfn(__sme_clr(cr3)), &pdpte,
2873
				       offset_in_page(cr3) + index * 8, 8);
2874 2875 2876 2877 2878
	if (ret)
		return 0;
	return pdpte;
}

2879 2880 2881 2882 2883
static void nested_svm_set_tdp_cr3(struct kvm_vcpu *vcpu,
				   unsigned long root)
{
	struct vcpu_svm *svm = to_svm(vcpu);

2884
	svm->vmcb->control.nested_cr3 = __sme_set(root);
2885
	mark_dirty(svm->vmcb, VMCB_NPT);
2886 2887
}

2888 2889
static void nested_svm_inject_npf_exit(struct kvm_vcpu *vcpu,
				       struct x86_exception *fault)
2890 2891 2892
{
	struct vcpu_svm *svm = to_svm(vcpu);

2893 2894 2895 2896 2897 2898 2899 2900 2901 2902 2903 2904 2905 2906 2907 2908 2909 2910 2911 2912
	if (svm->vmcb->control.exit_code != SVM_EXIT_NPF) {
		/*
		 * TODO: track the cause of the nested page fault, and
		 * correctly fill in the high bits of exit_info_1.
		 */
		svm->vmcb->control.exit_code = SVM_EXIT_NPF;
		svm->vmcb->control.exit_code_hi = 0;
		svm->vmcb->control.exit_info_1 = (1ULL << 32);
		svm->vmcb->control.exit_info_2 = fault->address;
	}

	svm->vmcb->control.exit_info_1 &= ~0xffffffffULL;
	svm->vmcb->control.exit_info_1 |= fault->error_code;

	/*
	 * The present bit is always zero for page structure faults on real
	 * hardware.
	 */
	if (svm->vmcb->control.exit_info_1 & (2ULL << 32))
		svm->vmcb->control.exit_info_1 &= ~1;
2913 2914 2915 2916

	nested_svm_vmexit(svm);
}

2917
static void nested_svm_init_mmu_context(struct kvm_vcpu *vcpu)
2918
{
2919 2920
	WARN_ON(mmu_is_nested(vcpu));
	kvm_init_shadow_mmu(vcpu);
2921 2922
	vcpu->arch.mmu.set_cr3           = nested_svm_set_tdp_cr3;
	vcpu->arch.mmu.get_cr3           = nested_svm_get_tdp_cr3;
2923
	vcpu->arch.mmu.get_pdptr         = nested_svm_get_tdp_pdptr;
2924
	vcpu->arch.mmu.inject_page_fault = nested_svm_inject_npf_exit;
2925
	vcpu->arch.mmu.shadow_root_level = get_npt_level(vcpu);
2926
	reset_shadow_zero_bits_mask(vcpu, &vcpu->arch.mmu);
2927 2928 2929 2930 2931 2932 2933 2934
	vcpu->arch.walk_mmu              = &vcpu->arch.nested_mmu;
}

static void nested_svm_uninit_mmu_context(struct kvm_vcpu *vcpu)
{
	vcpu->arch.walk_mmu = &vcpu->arch.mmu;
}

2935 2936
static int nested_svm_check_permissions(struct vcpu_svm *svm)
{
2937 2938
	if (!(svm->vcpu.arch.efer & EFER_SVME) ||
	    !is_paging(&svm->vcpu)) {
2939 2940 2941 2942 2943 2944 2945 2946 2947
		kvm_queue_exception(&svm->vcpu, UD_VECTOR);
		return 1;
	}

	if (svm->vmcb->save.cpl) {
		kvm_inject_gp(&svm->vcpu, 0);
		return 1;
	}

2948
	return 0;
2949 2950
}

2951 2952 2953
static int nested_svm_check_exception(struct vcpu_svm *svm, unsigned nr,
				      bool has_error_code, u32 error_code)
{
2954 2955
	int vmexit;

2956
	if (!is_guest_mode(&svm->vcpu))
2957
		return 0;
2958

2959 2960 2961 2962
	vmexit = nested_svm_intercept(svm);
	if (vmexit != NESTED_EXIT_DONE)
		return 0;

2963 2964 2965
	svm->vmcb->control.exit_code = SVM_EXIT_EXCP_BASE + nr;
	svm->vmcb->control.exit_code_hi = 0;
	svm->vmcb->control.exit_info_1 = error_code;
2966 2967 2968 2969 2970 2971 2972 2973 2974 2975

	/*
	 * FIXME: we should not write CR2 when L1 intercepts an L2 #PF exception.
	 * The fix is to add the ancillary datum (CR2 or DR6) to structs
	 * kvm_queued_exception and kvm_vcpu_events, so that CR2 and DR6 can be
	 * written only when inject_pending_event runs (DR6 would written here
	 * too).  This should be conditional on a new capability---if the
	 * capability is disabled, kvm_multiple_exception would write the
	 * ancillary information to CR2 or DR6, for backwards ABI-compatibility.
	 */
2976 2977 2978 2979
	if (svm->vcpu.arch.exception.nested_apf)
		svm->vmcb->control.exit_info_2 = svm->vcpu.arch.apf.nested_apf_token;
	else
		svm->vmcb->control.exit_info_2 = svm->vcpu.arch.cr2;
2980

2981
	svm->nested.exit_required = true;
2982
	return vmexit;
2983 2984
}

2985 2986
/* This function returns true if it is save to enable the irq window */
static inline bool nested_svm_intr(struct vcpu_svm *svm)
2987
{
2988
	if (!is_guest_mode(&svm->vcpu))
2989
		return true;
2990

2991
	if (!(svm->vcpu.arch.hflags & HF_VINTR_MASK))
2992
		return true;
2993

2994
	if (!(svm->vcpu.arch.hflags & HF_HIF_MASK))
2995
		return false;
2996

2997 2998 2999 3000 3001 3002 3003 3004
	/*
	 * if vmexit was already requested (by intercepted exception
	 * for instance) do not overwrite it with "external interrupt"
	 * vmexit.
	 */
	if (svm->nested.exit_required)
		return false;

3005 3006 3007
	svm->vmcb->control.exit_code   = SVM_EXIT_INTR;
	svm->vmcb->control.exit_info_1 = 0;
	svm->vmcb->control.exit_info_2 = 0;
3008

3009 3010 3011
	if (svm->nested.intercept & 1ULL) {
		/*
		 * The #vmexit can't be emulated here directly because this
G
Guo Chao 已提交
3012
		 * code path runs with irqs and preemption disabled. A
3013 3014 3015 3016
		 * #vmexit emulation might sleep. Only signal request for
		 * the #vmexit here.
		 */
		svm->nested.exit_required = true;
3017
		trace_kvm_nested_intr_vmexit(svm->vmcb->save.rip);
3018
		return false;
3019 3020
	}

3021
	return true;
3022 3023
}

3024 3025 3026
/* This function returns true if it is save to enable the nmi window */
static inline bool nested_svm_nmi(struct vcpu_svm *svm)
{
3027
	if (!is_guest_mode(&svm->vcpu))
3028 3029 3030 3031 3032 3033 3034 3035 3036
		return true;

	if (!(svm->nested.intercept & (1ULL << INTERCEPT_NMI)))
		return true;

	svm->vmcb->control.exit_code = SVM_EXIT_NMI;
	svm->nested.exit_required = true;

	return false;
3037 3038
}

3039
static void *nested_svm_map(struct vcpu_svm *svm, u64 gpa, struct page **_page)
3040 3041 3042
{
	struct page *page;

3043 3044
	might_sleep();

3045
	page = kvm_vcpu_gfn_to_page(&svm->vcpu, gpa >> PAGE_SHIFT);
3046 3047 3048
	if (is_error_page(page))
		goto error;

3049 3050 3051
	*_page = page;

	return kmap(page);
3052 3053 3054 3055 3056 3057 3058

error:
	kvm_inject_gp(&svm->vcpu, 0);

	return NULL;
}

3059
static void nested_svm_unmap(struct page *page)
3060
{
3061
	kunmap(page);
3062 3063 3064
	kvm_release_page_dirty(page);
}

3065 3066
static int nested_svm_intercept_ioio(struct vcpu_svm *svm)
{
3067 3068 3069
	unsigned port, size, iopm_len;
	u16 val, mask;
	u8 start_bit;
3070
	u64 gpa;
3071

3072 3073
	if (!(svm->nested.intercept & (1ULL << INTERCEPT_IOIO_PROT)))
		return NESTED_EXIT_HOST;
3074

3075
	port = svm->vmcb->control.exit_info_1 >> 16;
3076 3077
	size = (svm->vmcb->control.exit_info_1 & SVM_IOIO_SIZE_MASK) >>
		SVM_IOIO_SIZE_SHIFT;
3078
	gpa  = svm->nested.vmcb_iopm + (port / 8);
3079 3080 3081 3082
	start_bit = port % 8;
	iopm_len = (start_bit + size > 8) ? 2 : 1;
	mask = (0xf >> (4 - size)) << start_bit;
	val = 0;
3083

3084
	if (kvm_vcpu_read_guest(&svm->vcpu, gpa, &val, iopm_len))
3085
		return NESTED_EXIT_DONE;
3086

3087
	return (val & mask) ? NESTED_EXIT_DONE : NESTED_EXIT_HOST;
3088 3089
}

3090
static int nested_svm_exit_handled_msr(struct vcpu_svm *svm)
3091
{
3092 3093
	u32 offset, msr, value;
	int write, mask;
3094

3095
	if (!(svm->nested.intercept & (1ULL << INTERCEPT_MSR_PROT)))
3096
		return NESTED_EXIT_HOST;
3097

3098 3099 3100 3101
	msr    = svm->vcpu.arch.regs[VCPU_REGS_RCX];
	offset = svm_msrpm_offset(msr);
	write  = svm->vmcb->control.exit_info_1 & 1;
	mask   = 1 << ((2 * (msr & 0xf)) + write);
3102

3103 3104
	if (offset == MSR_INVALID)
		return NESTED_EXIT_DONE;
3105

3106 3107
	/* Offset is in 32 bit units but need in 8 bit units */
	offset *= 4;
3108

3109
	if (kvm_vcpu_read_guest(&svm->vcpu, svm->nested.vmcb_msrpm + offset, &value, 4))
3110
		return NESTED_EXIT_DONE;
3111

3112
	return (value & mask) ? NESTED_EXIT_DONE : NESTED_EXIT_HOST;
3113 3114
}

3115 3116 3117 3118 3119 3120 3121 3122 3123 3124 3125 3126 3127 3128 3129 3130 3131 3132 3133 3134 3135 3136 3137 3138 3139
/* DB exceptions for our internal use must not cause vmexit */
static int nested_svm_intercept_db(struct vcpu_svm *svm)
{
	unsigned long dr6;

	/* if we're not singlestepping, it's not ours */
	if (!svm->nmi_singlestep)
		return NESTED_EXIT_DONE;

	/* if it's not a singlestep exception, it's not ours */
	if (kvm_get_dr(&svm->vcpu, 6, &dr6))
		return NESTED_EXIT_DONE;
	if (!(dr6 & DR6_BS))
		return NESTED_EXIT_DONE;

	/* if the guest is singlestepping, it should get the vmexit */
	if (svm->nmi_singlestep_guest_rflags & X86_EFLAGS_TF) {
		disable_nmi_singlestep(svm);
		return NESTED_EXIT_DONE;
	}

	/* it's ours, the nested hypervisor must not see this one */
	return NESTED_EXIT_HOST;
}

3140
static int nested_svm_exit_special(struct vcpu_svm *svm)
3141 3142
{
	u32 exit_code = svm->vmcb->control.exit_code;
3143

3144 3145 3146
	switch (exit_code) {
	case SVM_EXIT_INTR:
	case SVM_EXIT_NMI:
3147
	case SVM_EXIT_EXCP_BASE + MC_VECTOR:
3148 3149
		return NESTED_EXIT_HOST;
	case SVM_EXIT_NPF:
J
Joerg Roedel 已提交
3150
		/* For now we are always handling NPFs when using them */
3151 3152 3153 3154
		if (npt_enabled)
			return NESTED_EXIT_HOST;
		break;
	case SVM_EXIT_EXCP_BASE + PF_VECTOR:
G
Gleb Natapov 已提交
3155
		/* When we're shadowing, trap PFs, but not async PF */
3156
		if (!npt_enabled && svm->vcpu.arch.apf.host_apf_reason == 0)
3157 3158 3159 3160
			return NESTED_EXIT_HOST;
		break;
	default:
		break;
3161 3162
	}

3163 3164 3165 3166 3167 3168
	return NESTED_EXIT_CONTINUE;
}

/*
 * If this function returns true, this #vmexit was already handled
 */
3169
static int nested_svm_intercept(struct vcpu_svm *svm)
3170 3171 3172 3173
{
	u32 exit_code = svm->vmcb->control.exit_code;
	int vmexit = NESTED_EXIT_HOST;

3174
	switch (exit_code) {
3175
	case SVM_EXIT_MSR:
3176
		vmexit = nested_svm_exit_handled_msr(svm);
3177
		break;
3178 3179 3180
	case SVM_EXIT_IOIO:
		vmexit = nested_svm_intercept_ioio(svm);
		break;
3181 3182 3183
	case SVM_EXIT_READ_CR0 ... SVM_EXIT_WRITE_CR8: {
		u32 bit = 1U << (exit_code - SVM_EXIT_READ_CR0);
		if (svm->nested.intercept_cr & bit)
3184
			vmexit = NESTED_EXIT_DONE;
3185 3186
		break;
	}
3187 3188 3189
	case SVM_EXIT_READ_DR0 ... SVM_EXIT_WRITE_DR7: {
		u32 bit = 1U << (exit_code - SVM_EXIT_READ_DR0);
		if (svm->nested.intercept_dr & bit)
3190
			vmexit = NESTED_EXIT_DONE;
3191 3192 3193 3194
		break;
	}
	case SVM_EXIT_EXCP_BASE ... SVM_EXIT_EXCP_BASE + 0x1f: {
		u32 excp_bits = 1 << (exit_code - SVM_EXIT_EXCP_BASE);
3195 3196 3197 3198 3199 3200
		if (svm->nested.intercept_exceptions & excp_bits) {
			if (exit_code == SVM_EXIT_EXCP_BASE + DB_VECTOR)
				vmexit = nested_svm_intercept_db(svm);
			else
				vmexit = NESTED_EXIT_DONE;
		}
G
Gleb Natapov 已提交
3201 3202
		/* async page fault always cause vmexit */
		else if ((exit_code == SVM_EXIT_EXCP_BASE + PF_VECTOR) &&
3203
			 svm->vcpu.arch.exception.nested_apf != 0)
G
Gleb Natapov 已提交
3204
			vmexit = NESTED_EXIT_DONE;
3205 3206
		break;
	}
3207 3208 3209 3210
	case SVM_EXIT_ERR: {
		vmexit = NESTED_EXIT_DONE;
		break;
	}
3211 3212
	default: {
		u64 exit_bits = 1ULL << (exit_code - SVM_EXIT_INTR);
J
Joerg Roedel 已提交
3213
		if (svm->nested.intercept & exit_bits)
3214
			vmexit = NESTED_EXIT_DONE;
3215 3216 3217
	}
	}

3218 3219 3220 3221 3222 3223 3224 3225 3226 3227
	return vmexit;
}

static int nested_svm_exit_handled(struct vcpu_svm *svm)
{
	int vmexit;

	vmexit = nested_svm_intercept(svm);

	if (vmexit == NESTED_EXIT_DONE)
3228 3229 3230
		nested_svm_vmexit(svm);

	return vmexit;
3231 3232
}

3233 3234 3235 3236 3237
static inline void copy_vmcb_control_area(struct vmcb *dst_vmcb, struct vmcb *from_vmcb)
{
	struct vmcb_control_area *dst  = &dst_vmcb->control;
	struct vmcb_control_area *from = &from_vmcb->control;

3238
	dst->intercept_cr         = from->intercept_cr;
3239
	dst->intercept_dr         = from->intercept_dr;
3240 3241 3242 3243 3244 3245 3246 3247 3248 3249 3250 3251 3252 3253 3254 3255 3256 3257 3258 3259
	dst->intercept_exceptions = from->intercept_exceptions;
	dst->intercept            = from->intercept;
	dst->iopm_base_pa         = from->iopm_base_pa;
	dst->msrpm_base_pa        = from->msrpm_base_pa;
	dst->tsc_offset           = from->tsc_offset;
	dst->asid                 = from->asid;
	dst->tlb_ctl              = from->tlb_ctl;
	dst->int_ctl              = from->int_ctl;
	dst->int_vector           = from->int_vector;
	dst->int_state            = from->int_state;
	dst->exit_code            = from->exit_code;
	dst->exit_code_hi         = from->exit_code_hi;
	dst->exit_info_1          = from->exit_info_1;
	dst->exit_info_2          = from->exit_info_2;
	dst->exit_int_info        = from->exit_int_info;
	dst->exit_int_info_err    = from->exit_int_info_err;
	dst->nested_ctl           = from->nested_ctl;
	dst->event_inj            = from->event_inj;
	dst->event_inj_err        = from->event_inj_err;
	dst->nested_cr3           = from->nested_cr3;
3260
	dst->virt_ext              = from->virt_ext;
3261 3262
}

3263
static int nested_svm_vmexit(struct vcpu_svm *svm)
3264
{
3265
	struct vmcb *nested_vmcb;
3266
	struct vmcb *hsave = svm->nested.hsave;
J
Joerg Roedel 已提交
3267
	struct vmcb *vmcb = svm->vmcb;
3268
	struct page *page;
3269

3270 3271 3272 3273
	trace_kvm_nested_vmexit_inject(vmcb->control.exit_code,
				       vmcb->control.exit_info_1,
				       vmcb->control.exit_info_2,
				       vmcb->control.exit_int_info,
3274 3275
				       vmcb->control.exit_int_info_err,
				       KVM_ISA_SVM);
3276

3277
	nested_vmcb = nested_svm_map(svm, svm->nested.vmcb, &page);
3278 3279 3280
	if (!nested_vmcb)
		return 1;

3281 3282
	/* Exit Guest-Mode */
	leave_guest_mode(&svm->vcpu);
3283 3284
	svm->nested.vmcb = 0;

3285
	/* Give the current vmcb to the guest */
J
Joerg Roedel 已提交
3286 3287 3288 3289 3290 3291 3292 3293
	disable_gif(svm);

	nested_vmcb->save.es     = vmcb->save.es;
	nested_vmcb->save.cs     = vmcb->save.cs;
	nested_vmcb->save.ss     = vmcb->save.ss;
	nested_vmcb->save.ds     = vmcb->save.ds;
	nested_vmcb->save.gdtr   = vmcb->save.gdtr;
	nested_vmcb->save.idtr   = vmcb->save.idtr;
3294
	nested_vmcb->save.efer   = svm->vcpu.arch.efer;
3295
	nested_vmcb->save.cr0    = kvm_read_cr0(&svm->vcpu);
3296
	nested_vmcb->save.cr3    = kvm_read_cr3(&svm->vcpu);
J
Joerg Roedel 已提交
3297
	nested_vmcb->save.cr2    = vmcb->save.cr2;
3298
	nested_vmcb->save.cr4    = svm->vcpu.arch.cr4;
3299
	nested_vmcb->save.rflags = kvm_get_rflags(&svm->vcpu);
J
Joerg Roedel 已提交
3300 3301 3302 3303 3304 3305 3306 3307 3308 3309 3310 3311 3312 3313 3314 3315
	nested_vmcb->save.rip    = vmcb->save.rip;
	nested_vmcb->save.rsp    = vmcb->save.rsp;
	nested_vmcb->save.rax    = vmcb->save.rax;
	nested_vmcb->save.dr7    = vmcb->save.dr7;
	nested_vmcb->save.dr6    = vmcb->save.dr6;
	nested_vmcb->save.cpl    = vmcb->save.cpl;

	nested_vmcb->control.int_ctl           = vmcb->control.int_ctl;
	nested_vmcb->control.int_vector        = vmcb->control.int_vector;
	nested_vmcb->control.int_state         = vmcb->control.int_state;
	nested_vmcb->control.exit_code         = vmcb->control.exit_code;
	nested_vmcb->control.exit_code_hi      = vmcb->control.exit_code_hi;
	nested_vmcb->control.exit_info_1       = vmcb->control.exit_info_1;
	nested_vmcb->control.exit_info_2       = vmcb->control.exit_info_2;
	nested_vmcb->control.exit_int_info     = vmcb->control.exit_int_info;
	nested_vmcb->control.exit_int_info_err = vmcb->control.exit_int_info_err;
3316 3317 3318

	if (svm->nrips_enabled)
		nested_vmcb->control.next_rip  = vmcb->control.next_rip;
3319 3320 3321 3322 3323 3324 3325 3326 3327 3328 3329 3330 3331 3332 3333 3334

	/*
	 * If we emulate a VMRUN/#VMEXIT in the same host #vmexit cycle we have
	 * to make sure that we do not lose injected events. So check event_inj
	 * here and copy it to exit_int_info if it is valid.
	 * Exit_int_info and event_inj can't be both valid because the case
	 * below only happens on a VMRUN instruction intercept which has
	 * no valid exit_int_info set.
	 */
	if (vmcb->control.event_inj & SVM_EVTINJ_VALID) {
		struct vmcb_control_area *nc = &nested_vmcb->control;

		nc->exit_int_info     = vmcb->control.event_inj;
		nc->exit_int_info_err = vmcb->control.event_inj_err;
	}

J
Joerg Roedel 已提交
3335 3336 3337
	nested_vmcb->control.tlb_ctl           = 0;
	nested_vmcb->control.event_inj         = 0;
	nested_vmcb->control.event_inj_err     = 0;
3338 3339 3340 3341 3342 3343

	/* We always set V_INTR_MASKING and remember the old value in hflags */
	if (!(svm->vcpu.arch.hflags & HF_VINTR_MASK))
		nested_vmcb->control.int_ctl &= ~V_INTR_MASKING_MASK;

	/* Restore the original control entries */
3344
	copy_vmcb_control_area(vmcb, hsave);
3345

3346
	svm->vcpu.arch.tsc_offset = svm->vmcb->control.tsc_offset;
3347 3348
	kvm_clear_exception_queue(&svm->vcpu);
	kvm_clear_interrupt_queue(&svm->vcpu);
3349

3350 3351
	svm->nested.nested_cr3 = 0;

3352 3353 3354 3355 3356 3357 3358
	/* Restore selected save entries */
	svm->vmcb->save.es = hsave->save.es;
	svm->vmcb->save.cs = hsave->save.cs;
	svm->vmcb->save.ss = hsave->save.ss;
	svm->vmcb->save.ds = hsave->save.ds;
	svm->vmcb->save.gdtr = hsave->save.gdtr;
	svm->vmcb->save.idtr = hsave->save.idtr;
3359
	kvm_set_rflags(&svm->vcpu, hsave->save.rflags);
3360 3361 3362 3363 3364 3365 3366
	svm_set_efer(&svm->vcpu, hsave->save.efer);
	svm_set_cr0(&svm->vcpu, hsave->save.cr0 | X86_CR0_PE);
	svm_set_cr4(&svm->vcpu, hsave->save.cr4);
	if (npt_enabled) {
		svm->vmcb->save.cr3 = hsave->save.cr3;
		svm->vcpu.arch.cr3 = hsave->save.cr3;
	} else {
3367
		(void)kvm_set_cr3(&svm->vcpu, hsave->save.cr3);
3368 3369 3370 3371 3372 3373 3374 3375
	}
	kvm_register_write(&svm->vcpu, VCPU_REGS_RAX, hsave->save.rax);
	kvm_register_write(&svm->vcpu, VCPU_REGS_RSP, hsave->save.rsp);
	kvm_register_write(&svm->vcpu, VCPU_REGS_RIP, hsave->save.rip);
	svm->vmcb->save.dr7 = 0;
	svm->vmcb->save.cpl = 0;
	svm->vmcb->control.exit_int_info = 0;

3376 3377
	mark_all_dirty(svm->vmcb);

3378
	nested_svm_unmap(page);
3379

3380
	nested_svm_uninit_mmu_context(&svm->vcpu);
3381 3382 3383 3384 3385
	kvm_mmu_reset_context(&svm->vcpu);
	kvm_mmu_load(&svm->vcpu);

	return 0;
}
A
Alexander Graf 已提交
3386

3387
static bool nested_svm_vmrun_msrpm(struct vcpu_svm *svm)
A
Alexander Graf 已提交
3388
{
3389 3390
	/*
	 * This function merges the msr permission bitmaps of kvm and the
G
Guo Chao 已提交
3391
	 * nested vmcb. It is optimized in that it only merges the parts where
3392 3393
	 * the kvm msr permission bitmap may contain zero bits
	 */
A
Alexander Graf 已提交
3394
	int i;
3395

3396 3397
	if (!(svm->nested.intercept & (1ULL << INTERCEPT_MSR_PROT)))
		return true;
3398

3399 3400 3401
	for (i = 0; i < MSRPM_OFFSETS; i++) {
		u32 value, p;
		u64 offset;
3402

3403 3404
		if (msrpm_offsets[i] == 0xffffffff)
			break;
A
Alexander Graf 已提交
3405

3406 3407
		p      = msrpm_offsets[i];
		offset = svm->nested.vmcb_msrpm + (p * 4);
3408

3409
		if (kvm_vcpu_read_guest(&svm->vcpu, offset, &value, 4))
3410 3411 3412 3413
			return false;

		svm->nested.msrpm[p] = svm->msrpm[p] | value;
	}
A
Alexander Graf 已提交
3414

3415
	svm->vmcb->control.msrpm_base_pa = __sme_set(__pa(svm->nested.msrpm));
3416 3417

	return true;
A
Alexander Graf 已提交
3418 3419
}

3420 3421 3422 3423 3424
static bool nested_vmcb_checks(struct vmcb *vmcb)
{
	if ((vmcb->control.intercept & (1ULL << INTERCEPT_VMRUN)) == 0)
		return false;

3425 3426 3427
	if (vmcb->control.asid == 0)
		return false;

3428 3429
	if ((vmcb->control.nested_ctl & SVM_NESTED_CTL_NP_ENABLE) &&
	    !npt_enabled)
3430 3431
		return false;

3432 3433 3434
	return true;
}

L
Ladi Prosek 已提交
3435 3436
static void enter_svm_guest_mode(struct vcpu_svm *svm, u64 vmcb_gpa,
				 struct vmcb *nested_vmcb, struct page *page)
A
Alexander Graf 已提交
3437
{
3438
	if (kvm_get_rflags(&svm->vcpu) & X86_EFLAGS_IF)
A
Alexander Graf 已提交
3439 3440 3441 3442
		svm->vcpu.arch.hflags |= HF_HIF_MASK;
	else
		svm->vcpu.arch.hflags &= ~HF_HIF_MASK;

3443
	if (nested_vmcb->control.nested_ctl & SVM_NESTED_CTL_NP_ENABLE) {
3444 3445 3446 3447 3448
		kvm_mmu_unload(&svm->vcpu);
		svm->nested.nested_cr3 = nested_vmcb->control.nested_cr3;
		nested_svm_init_mmu_context(&svm->vcpu);
	}

A
Alexander Graf 已提交
3449 3450 3451 3452 3453 3454 3455
	/* Load the nested guest state */
	svm->vmcb->save.es = nested_vmcb->save.es;
	svm->vmcb->save.cs = nested_vmcb->save.cs;
	svm->vmcb->save.ss = nested_vmcb->save.ss;
	svm->vmcb->save.ds = nested_vmcb->save.ds;
	svm->vmcb->save.gdtr = nested_vmcb->save.gdtr;
	svm->vmcb->save.idtr = nested_vmcb->save.idtr;
3456
	kvm_set_rflags(&svm->vcpu, nested_vmcb->save.rflags);
A
Alexander Graf 已提交
3457 3458 3459 3460 3461 3462
	svm_set_efer(&svm->vcpu, nested_vmcb->save.efer);
	svm_set_cr0(&svm->vcpu, nested_vmcb->save.cr0);
	svm_set_cr4(&svm->vcpu, nested_vmcb->save.cr4);
	if (npt_enabled) {
		svm->vmcb->save.cr3 = nested_vmcb->save.cr3;
		svm->vcpu.arch.cr3 = nested_vmcb->save.cr3;
3463
	} else
3464
		(void)kvm_set_cr3(&svm->vcpu, nested_vmcb->save.cr3);
3465 3466 3467 3468

	/* Guest paging mode is active - reset mmu */
	kvm_mmu_reset_context(&svm->vcpu);

J
Joerg Roedel 已提交
3469
	svm->vmcb->save.cr2 = svm->vcpu.arch.cr2 = nested_vmcb->save.cr2;
A
Alexander Graf 已提交
3470 3471 3472
	kvm_register_write(&svm->vcpu, VCPU_REGS_RAX, nested_vmcb->save.rax);
	kvm_register_write(&svm->vcpu, VCPU_REGS_RSP, nested_vmcb->save.rsp);
	kvm_register_write(&svm->vcpu, VCPU_REGS_RIP, nested_vmcb->save.rip);
J
Joerg Roedel 已提交
3473

A
Alexander Graf 已提交
3474 3475 3476 3477 3478 3479 3480 3481
	/* In case we don't even reach vcpu_run, the fields are not updated */
	svm->vmcb->save.rax = nested_vmcb->save.rax;
	svm->vmcb->save.rsp = nested_vmcb->save.rsp;
	svm->vmcb->save.rip = nested_vmcb->save.rip;
	svm->vmcb->save.dr7 = nested_vmcb->save.dr7;
	svm->vmcb->save.dr6 = nested_vmcb->save.dr6;
	svm->vmcb->save.cpl = nested_vmcb->save.cpl;

3482
	svm->nested.vmcb_msrpm = nested_vmcb->control.msrpm_base_pa & ~0x0fffULL;
3483
	svm->nested.vmcb_iopm  = nested_vmcb->control.iopm_base_pa  & ~0x0fffULL;
A
Alexander Graf 已提交
3484

J
Joerg Roedel 已提交
3485
	/* cache intercepts */
3486
	svm->nested.intercept_cr         = nested_vmcb->control.intercept_cr;
3487
	svm->nested.intercept_dr         = nested_vmcb->control.intercept_dr;
J
Joerg Roedel 已提交
3488 3489 3490
	svm->nested.intercept_exceptions = nested_vmcb->control.intercept_exceptions;
	svm->nested.intercept            = nested_vmcb->control.intercept;

3491
	svm_flush_tlb(&svm->vcpu, true);
A
Alexander Graf 已提交
3492 3493 3494 3495 3496 3497
	svm->vmcb->control.int_ctl = nested_vmcb->control.int_ctl | V_INTR_MASKING_MASK;
	if (nested_vmcb->control.int_ctl & V_INTR_MASKING_MASK)
		svm->vcpu.arch.hflags |= HF_VINTR_MASK;
	else
		svm->vcpu.arch.hflags &= ~HF_VINTR_MASK;

3498 3499
	if (svm->vcpu.arch.hflags & HF_VINTR_MASK) {
		/* We only want the cr8 intercept bits of the guest */
3500 3501
		clr_cr_intercept(svm, INTERCEPT_CR8_READ);
		clr_cr_intercept(svm, INTERCEPT_CR8_WRITE);
3502 3503
	}

3504
	/* We don't want to see VMMCALLs from a nested guest */
3505
	clr_intercept(svm, INTERCEPT_VMMCALL);
3506

3507 3508 3509
	svm->vcpu.arch.tsc_offset += nested_vmcb->control.tsc_offset;
	svm->vmcb->control.tsc_offset = svm->vcpu.arch.tsc_offset;

3510
	svm->vmcb->control.virt_ext = nested_vmcb->control.virt_ext;
A
Alexander Graf 已提交
3511 3512 3513 3514 3515
	svm->vmcb->control.int_vector = nested_vmcb->control.int_vector;
	svm->vmcb->control.int_state = nested_vmcb->control.int_state;
	svm->vmcb->control.event_inj = nested_vmcb->control.event_inj;
	svm->vmcb->control.event_inj_err = nested_vmcb->control.event_inj_err;

3516
	nested_svm_unmap(page);
3517

3518 3519 3520
	/* Enter Guest-Mode */
	enter_guest_mode(&svm->vcpu);

3521 3522 3523 3524 3525 3526
	/*
	 * Merge guest and host intercepts - must be called  with vcpu in
	 * guest-mode to take affect here
	 */
	recalc_intercepts(svm);

3527
	svm->nested.vmcb = vmcb_gpa;
3528

3529
	enable_gif(svm);
A
Alexander Graf 已提交
3530

3531
	mark_all_dirty(svm->vmcb);
L
Ladi Prosek 已提交
3532 3533 3534 3535 3536 3537 3538 3539 3540 3541 3542 3543 3544 3545 3546 3547 3548 3549 3550 3551 3552 3553 3554 3555 3556 3557 3558 3559 3560 3561 3562 3563 3564 3565 3566 3567 3568 3569 3570 3571 3572 3573 3574 3575 3576 3577 3578 3579 3580 3581 3582 3583 3584 3585 3586 3587 3588 3589 3590 3591 3592 3593 3594 3595 3596 3597 3598
}

static bool nested_svm_vmrun(struct vcpu_svm *svm)
{
	struct vmcb *nested_vmcb;
	struct vmcb *hsave = svm->nested.hsave;
	struct vmcb *vmcb = svm->vmcb;
	struct page *page;
	u64 vmcb_gpa;

	vmcb_gpa = svm->vmcb->save.rax;

	nested_vmcb = nested_svm_map(svm, svm->vmcb->save.rax, &page);
	if (!nested_vmcb)
		return false;

	if (!nested_vmcb_checks(nested_vmcb)) {
		nested_vmcb->control.exit_code    = SVM_EXIT_ERR;
		nested_vmcb->control.exit_code_hi = 0;
		nested_vmcb->control.exit_info_1  = 0;
		nested_vmcb->control.exit_info_2  = 0;

		nested_svm_unmap(page);

		return false;
	}

	trace_kvm_nested_vmrun(svm->vmcb->save.rip, vmcb_gpa,
			       nested_vmcb->save.rip,
			       nested_vmcb->control.int_ctl,
			       nested_vmcb->control.event_inj,
			       nested_vmcb->control.nested_ctl);

	trace_kvm_nested_intercepts(nested_vmcb->control.intercept_cr & 0xffff,
				    nested_vmcb->control.intercept_cr >> 16,
				    nested_vmcb->control.intercept_exceptions,
				    nested_vmcb->control.intercept);

	/* Clear internal status */
	kvm_clear_exception_queue(&svm->vcpu);
	kvm_clear_interrupt_queue(&svm->vcpu);

	/*
	 * Save the old vmcb, so we don't need to pick what we save, but can
	 * restore everything when a VMEXIT occurs
	 */
	hsave->save.es     = vmcb->save.es;
	hsave->save.cs     = vmcb->save.cs;
	hsave->save.ss     = vmcb->save.ss;
	hsave->save.ds     = vmcb->save.ds;
	hsave->save.gdtr   = vmcb->save.gdtr;
	hsave->save.idtr   = vmcb->save.idtr;
	hsave->save.efer   = svm->vcpu.arch.efer;
	hsave->save.cr0    = kvm_read_cr0(&svm->vcpu);
	hsave->save.cr4    = svm->vcpu.arch.cr4;
	hsave->save.rflags = kvm_get_rflags(&svm->vcpu);
	hsave->save.rip    = kvm_rip_read(&svm->vcpu);
	hsave->save.rsp    = vmcb->save.rsp;
	hsave->save.rax    = vmcb->save.rax;
	if (npt_enabled)
		hsave->save.cr3    = vmcb->save.cr3;
	else
		hsave->save.cr3    = kvm_read_cr3(&svm->vcpu);

	copy_vmcb_control_area(hsave, vmcb);

	enter_svm_guest_mode(svm, vmcb_gpa, nested_vmcb, page);
3599

3600
	return true;
A
Alexander Graf 已提交
3601 3602
}

3603
static void nested_svm_vmloadsave(struct vmcb *from_vmcb, struct vmcb *to_vmcb)
3604 3605 3606 3607 3608 3609 3610 3611 3612 3613 3614 3615 3616 3617 3618
{
	to_vmcb->save.fs = from_vmcb->save.fs;
	to_vmcb->save.gs = from_vmcb->save.gs;
	to_vmcb->save.tr = from_vmcb->save.tr;
	to_vmcb->save.ldtr = from_vmcb->save.ldtr;
	to_vmcb->save.kernel_gs_base = from_vmcb->save.kernel_gs_base;
	to_vmcb->save.star = from_vmcb->save.star;
	to_vmcb->save.lstar = from_vmcb->save.lstar;
	to_vmcb->save.cstar = from_vmcb->save.cstar;
	to_vmcb->save.sfmask = from_vmcb->save.sfmask;
	to_vmcb->save.sysenter_cs = from_vmcb->save.sysenter_cs;
	to_vmcb->save.sysenter_esp = from_vmcb->save.sysenter_esp;
	to_vmcb->save.sysenter_eip = from_vmcb->save.sysenter_eip;
}

A
Avi Kivity 已提交
3619
static int vmload_interception(struct vcpu_svm *svm)
3620
{
3621
	struct vmcb *nested_vmcb;
3622
	struct page *page;
3623
	int ret;
3624

3625 3626 3627
	if (nested_svm_check_permissions(svm))
		return 1;

3628
	nested_vmcb = nested_svm_map(svm, svm->vmcb->save.rax, &page);
3629 3630 3631
	if (!nested_vmcb)
		return 1;

3632
	svm->next_rip = kvm_rip_read(&svm->vcpu) + 3;
3633
	ret = kvm_skip_emulated_instruction(&svm->vcpu);
3634

3635
	nested_svm_vmloadsave(nested_vmcb, svm->vmcb);
3636
	nested_svm_unmap(page);
3637

3638
	return ret;
3639 3640
}

A
Avi Kivity 已提交
3641
static int vmsave_interception(struct vcpu_svm *svm)
3642
{
3643
	struct vmcb *nested_vmcb;
3644
	struct page *page;
3645
	int ret;
3646

3647 3648 3649
	if (nested_svm_check_permissions(svm))
		return 1;

3650
	nested_vmcb = nested_svm_map(svm, svm->vmcb->save.rax, &page);
3651 3652 3653
	if (!nested_vmcb)
		return 1;

3654
	svm->next_rip = kvm_rip_read(&svm->vcpu) + 3;
3655
	ret = kvm_skip_emulated_instruction(&svm->vcpu);
3656

3657
	nested_svm_vmloadsave(svm->vmcb, nested_vmcb);
3658
	nested_svm_unmap(page);
3659

3660
	return ret;
3661 3662
}

A
Avi Kivity 已提交
3663
static int vmrun_interception(struct vcpu_svm *svm)
A
Alexander Graf 已提交
3664 3665 3666 3667
{
	if (nested_svm_check_permissions(svm))
		return 1;

3668 3669
	/* Save rip after vmrun instruction */
	kvm_rip_write(&svm->vcpu, kvm_rip_read(&svm->vcpu) + 3);
A
Alexander Graf 已提交
3670

3671
	if (!nested_svm_vmrun(svm))
A
Alexander Graf 已提交
3672 3673
		return 1;

3674
	if (!nested_svm_vmrun_msrpm(svm))
3675 3676 3677 3678 3679 3680 3681 3682 3683 3684 3685 3686
		goto failed;

	return 1;

failed:

	svm->vmcb->control.exit_code    = SVM_EXIT_ERR;
	svm->vmcb->control.exit_code_hi = 0;
	svm->vmcb->control.exit_info_1  = 0;
	svm->vmcb->control.exit_info_2  = 0;

	nested_svm_vmexit(svm);
A
Alexander Graf 已提交
3687 3688 3689 3690

	return 1;
}

A
Avi Kivity 已提交
3691
static int stgi_interception(struct vcpu_svm *svm)
3692
{
3693 3694
	int ret;

3695 3696 3697
	if (nested_svm_check_permissions(svm))
		return 1;

3698 3699
	/*
	 * If VGIF is enabled, the STGI intercept is only added to
3700
	 * detect the opening of the SMI/NMI window; remove it now.
3701 3702 3703 3704
	 */
	if (vgif_enabled(svm))
		clr_intercept(svm, INTERCEPT_STGI);

3705
	svm->next_rip = kvm_rip_read(&svm->vcpu) + 3;
3706
	ret = kvm_skip_emulated_instruction(&svm->vcpu);
3707
	kvm_make_request(KVM_REQ_EVENT, &svm->vcpu);
3708

3709
	enable_gif(svm);
3710

3711
	return ret;
3712 3713
}

A
Avi Kivity 已提交
3714
static int clgi_interception(struct vcpu_svm *svm)
3715
{
3716 3717
	int ret;

3718 3719 3720 3721
	if (nested_svm_check_permissions(svm))
		return 1;

	svm->next_rip = kvm_rip_read(&svm->vcpu) + 3;
3722
	ret = kvm_skip_emulated_instruction(&svm->vcpu);
3723

3724
	disable_gif(svm);
3725 3726

	/* After a CLGI no interrupts should come */
3727 3728 3729 3730 3731
	if (!kvm_vcpu_apicv_active(&svm->vcpu)) {
		svm_clear_vintr(svm);
		svm->vmcb->control.int_ctl &= ~V_IRQ_MASK;
		mark_dirty(svm->vmcb, VMCB_INTR);
	}
3732

3733
	return ret;
3734 3735
}

A
Avi Kivity 已提交
3736
static int invlpga_interception(struct vcpu_svm *svm)
A
Alexander Graf 已提交
3737 3738 3739
{
	struct kvm_vcpu *vcpu = &svm->vcpu;

3740 3741
	trace_kvm_invlpga(svm->vmcb->save.rip, kvm_register_read(&svm->vcpu, VCPU_REGS_RCX),
			  kvm_register_read(&svm->vcpu, VCPU_REGS_RAX));
3742

A
Alexander Graf 已提交
3743
	/* Let's treat INVLPGA the same as INVLPG (can be optimized!) */
3744
	kvm_mmu_invlpg(vcpu, kvm_register_read(&svm->vcpu, VCPU_REGS_RAX));
A
Alexander Graf 已提交
3745 3746

	svm->next_rip = kvm_rip_read(&svm->vcpu) + 3;
3747
	return kvm_skip_emulated_instruction(&svm->vcpu);
A
Alexander Graf 已提交
3748 3749
}

3750 3751
static int skinit_interception(struct vcpu_svm *svm)
{
3752
	trace_kvm_skinit(svm->vmcb->save.rip, kvm_register_read(&svm->vcpu, VCPU_REGS_RAX));
3753 3754 3755 3756 3757

	kvm_queue_exception(&svm->vcpu, UD_VECTOR);
	return 1;
}

D
David Kaplan 已提交
3758 3759
static int wbinvd_interception(struct vcpu_svm *svm)
{
3760
	return kvm_emulate_wbinvd(&svm->vcpu);
D
David Kaplan 已提交
3761 3762
}

J
Joerg Roedel 已提交
3763 3764 3765 3766 3767 3768 3769
static int xsetbv_interception(struct vcpu_svm *svm)
{
	u64 new_bv = kvm_read_edx_eax(&svm->vcpu);
	u32 index = kvm_register_read(&svm->vcpu, VCPU_REGS_RCX);

	if (kvm_set_xcr(&svm->vcpu, index, new_bv) == 0) {
		svm->next_rip = kvm_rip_read(&svm->vcpu) + 3;
3770
		return kvm_skip_emulated_instruction(&svm->vcpu);
J
Joerg Roedel 已提交
3771 3772 3773 3774 3775
	}

	return 1;
}

A
Avi Kivity 已提交
3776
static int task_switch_interception(struct vcpu_svm *svm)
A
Avi Kivity 已提交
3777
{
3778
	u16 tss_selector;
3779 3780 3781
	int reason;
	int int_type = svm->vmcb->control.exit_int_info &
		SVM_EXITINTINFO_TYPE_MASK;
3782
	int int_vec = svm->vmcb->control.exit_int_info & SVM_EVTINJ_VEC_MASK;
3783 3784 3785 3786
	uint32_t type =
		svm->vmcb->control.exit_int_info & SVM_EXITINTINFO_TYPE_MASK;
	uint32_t idt_v =
		svm->vmcb->control.exit_int_info & SVM_EXITINTINFO_VALID;
3787 3788
	bool has_error_code = false;
	u32 error_code = 0;
3789 3790

	tss_selector = (u16)svm->vmcb->control.exit_info_1;
3791

3792 3793
	if (svm->vmcb->control.exit_info_2 &
	    (1ULL << SVM_EXITINFOSHIFT_TS_REASON_IRET))
3794 3795 3796 3797
		reason = TASK_SWITCH_IRET;
	else if (svm->vmcb->control.exit_info_2 &
		 (1ULL << SVM_EXITINFOSHIFT_TS_REASON_JMP))
		reason = TASK_SWITCH_JMP;
3798
	else if (idt_v)
3799 3800 3801 3802
		reason = TASK_SWITCH_GATE;
	else
		reason = TASK_SWITCH_CALL;

3803 3804 3805 3806 3807 3808
	if (reason == TASK_SWITCH_GATE) {
		switch (type) {
		case SVM_EXITINTINFO_TYPE_NMI:
			svm->vcpu.arch.nmi_injected = false;
			break;
		case SVM_EXITINTINFO_TYPE_EXEPT:
3809 3810 3811 3812 3813 3814
			if (svm->vmcb->control.exit_info_2 &
			    (1ULL << SVM_EXITINFOSHIFT_TS_HAS_ERROR_CODE)) {
				has_error_code = true;
				error_code =
					(u32)svm->vmcb->control.exit_info_2;
			}
3815 3816 3817 3818 3819 3820 3821 3822 3823
			kvm_clear_exception_queue(&svm->vcpu);
			break;
		case SVM_EXITINTINFO_TYPE_INTR:
			kvm_clear_interrupt_queue(&svm->vcpu);
			break;
		default:
			break;
		}
	}
3824

3825 3826 3827
	if (reason != TASK_SWITCH_GATE ||
	    int_type == SVM_EXITINTINFO_TYPE_SOFT ||
	    (int_type == SVM_EXITINTINFO_TYPE_EXEPT &&
3828 3829
	     (int_vec == OF_VECTOR || int_vec == BP_VECTOR)))
		skip_emulated_instruction(&svm->vcpu);
3830

3831 3832 3833 3834
	if (int_type != SVM_EXITINTINFO_TYPE_SOFT)
		int_vec = -1;

	if (kvm_task_switch(&svm->vcpu, tss_selector, int_vec, reason,
3835 3836 3837 3838 3839 3840 3841
				has_error_code, error_code) == EMULATE_FAIL) {
		svm->vcpu.run->exit_reason = KVM_EXIT_INTERNAL_ERROR;
		svm->vcpu.run->internal.suberror = KVM_INTERNAL_ERROR_EMULATION;
		svm->vcpu.run->internal.ndata = 0;
		return 0;
	}
	return 1;
A
Avi Kivity 已提交
3842 3843
}

A
Avi Kivity 已提交
3844
static int cpuid_interception(struct vcpu_svm *svm)
A
Avi Kivity 已提交
3845
{
3846
	svm->next_rip = kvm_rip_read(&svm->vcpu) + 2;
3847
	return kvm_emulate_cpuid(&svm->vcpu);
A
Avi Kivity 已提交
3848 3849
}

A
Avi Kivity 已提交
3850
static int iret_interception(struct vcpu_svm *svm)
3851 3852
{
	++svm->vcpu.stat.nmi_window_exits;
3853
	clr_intercept(svm, INTERCEPT_IRET);
3854
	svm->vcpu.arch.hflags |= HF_IRET_MASK;
3855
	svm->nmi_iret_rip = kvm_rip_read(&svm->vcpu);
3856
	kvm_make_request(KVM_REQ_EVENT, &svm->vcpu);
3857 3858 3859
	return 1;
}

A
Avi Kivity 已提交
3860
static int invlpg_interception(struct vcpu_svm *svm)
M
Marcelo Tosatti 已提交
3861
{
3862
	if (!static_cpu_has(X86_FEATURE_DECODEASSISTS))
3863
		return kvm_emulate_instruction(&svm->vcpu, 0) == EMULATE_DONE;
3864 3865

	kvm_mmu_invlpg(&svm->vcpu, svm->vmcb->control.exit_info_1);
3866
	return kvm_skip_emulated_instruction(&svm->vcpu);
M
Marcelo Tosatti 已提交
3867 3868
}

A
Avi Kivity 已提交
3869
static int emulate_on_interception(struct vcpu_svm *svm)
A
Avi Kivity 已提交
3870
{
3871
	return kvm_emulate_instruction(&svm->vcpu, 0) == EMULATE_DONE;
A
Avi Kivity 已提交
3872 3873
}

B
Brijesh Singh 已提交
3874 3875
static int rsm_interception(struct vcpu_svm *svm)
{
3876 3877
	return kvm_emulate_instruction_from_buffer(&svm->vcpu,
					rsm_ins_bytes, 2) == EMULATE_DONE;
B
Brijesh Singh 已提交
3878 3879
}

A
Avi Kivity 已提交
3880 3881 3882 3883 3884 3885 3886 3887
static int rdpmc_interception(struct vcpu_svm *svm)
{
	int err;

	if (!static_cpu_has(X86_FEATURE_NRIPS))
		return emulate_on_interception(svm);

	err = kvm_rdpmc(&svm->vcpu);
3888
	return kvm_complete_insn_gp(&svm->vcpu, err);
A
Avi Kivity 已提交
3889 3890
}

3891 3892
static bool check_selective_cr0_intercepted(struct vcpu_svm *svm,
					    unsigned long val)
3893 3894 3895 3896 3897 3898 3899 3900 3901 3902 3903 3904 3905 3906 3907 3908 3909 3910 3911 3912 3913 3914
{
	unsigned long cr0 = svm->vcpu.arch.cr0;
	bool ret = false;
	u64 intercept;

	intercept = svm->nested.intercept;

	if (!is_guest_mode(&svm->vcpu) ||
	    (!(intercept & (1ULL << INTERCEPT_SELECTIVE_CR0))))
		return false;

	cr0 &= ~SVM_CR0_SELECTIVE_MASK;
	val &= ~SVM_CR0_SELECTIVE_MASK;

	if (cr0 ^ val) {
		svm->vmcb->control.exit_code = SVM_EXIT_CR0_SEL_WRITE;
		ret = (nested_svm_exit_handled(svm) == NESTED_EXIT_DONE);
	}

	return ret;
}

3915 3916 3917 3918 3919 3920 3921 3922 3923 3924 3925 3926 3927 3928 3929
#define CR_VALID (1ULL << 63)

static int cr_interception(struct vcpu_svm *svm)
{
	int reg, cr;
	unsigned long val;
	int err;

	if (!static_cpu_has(X86_FEATURE_DECODEASSISTS))
		return emulate_on_interception(svm);

	if (unlikely((svm->vmcb->control.exit_info_1 & CR_VALID) == 0))
		return emulate_on_interception(svm);

	reg = svm->vmcb->control.exit_info_1 & SVM_EXITINFO_REG_MASK;
3930 3931 3932 3933
	if (svm->vmcb->control.exit_code == SVM_EXIT_CR0_SEL_WRITE)
		cr = SVM_EXIT_WRITE_CR0 - SVM_EXIT_READ_CR0;
	else
		cr = svm->vmcb->control.exit_code - SVM_EXIT_READ_CR0;
3934 3935 3936 3937 3938 3939 3940

	err = 0;
	if (cr >= 16) { /* mov to cr */
		cr -= 16;
		val = kvm_register_read(&svm->vcpu, reg);
		switch (cr) {
		case 0:
3941 3942
			if (!check_selective_cr0_intercepted(svm, val))
				err = kvm_set_cr0(&svm->vcpu, val);
3943 3944 3945
			else
				return 1;

3946 3947 3948 3949 3950 3951 3952 3953 3954 3955 3956 3957 3958 3959 3960 3961 3962 3963 3964 3965 3966 3967 3968 3969
			break;
		case 3:
			err = kvm_set_cr3(&svm->vcpu, val);
			break;
		case 4:
			err = kvm_set_cr4(&svm->vcpu, val);
			break;
		case 8:
			err = kvm_set_cr8(&svm->vcpu, val);
			break;
		default:
			WARN(1, "unhandled write to CR%d", cr);
			kvm_queue_exception(&svm->vcpu, UD_VECTOR);
			return 1;
		}
	} else { /* mov from cr */
		switch (cr) {
		case 0:
			val = kvm_read_cr0(&svm->vcpu);
			break;
		case 2:
			val = svm->vcpu.arch.cr2;
			break;
		case 3:
3970
			val = kvm_read_cr3(&svm->vcpu);
3971 3972 3973 3974 3975 3976 3977 3978 3979 3980 3981 3982 3983 3984
			break;
		case 4:
			val = kvm_read_cr4(&svm->vcpu);
			break;
		case 8:
			val = kvm_get_cr8(&svm->vcpu);
			break;
		default:
			WARN(1, "unhandled read from CR%d", cr);
			kvm_queue_exception(&svm->vcpu, UD_VECTOR);
			return 1;
		}
		kvm_register_write(&svm->vcpu, reg, val);
	}
3985
	return kvm_complete_insn_gp(&svm->vcpu, err);
3986 3987
}

3988 3989 3990 3991 3992
static int dr_interception(struct vcpu_svm *svm)
{
	int reg, dr;
	unsigned long val;

3993 3994 3995 3996 3997 3998 3999 4000 4001 4002 4003
	if (svm->vcpu.guest_debug == 0) {
		/*
		 * No more DR vmexits; force a reload of the debug registers
		 * and reenter on this instruction.  The next vmexit will
		 * retrieve the full state of the debug registers.
		 */
		clr_dr_intercepts(svm);
		svm->vcpu.arch.switch_db_regs |= KVM_DEBUGREG_WONT_EXIT;
		return 1;
	}

4004 4005 4006 4007 4008 4009 4010
	if (!boot_cpu_has(X86_FEATURE_DECODEASSISTS))
		return emulate_on_interception(svm);

	reg = svm->vmcb->control.exit_info_1 & SVM_EXITINFO_REG_MASK;
	dr = svm->vmcb->control.exit_code - SVM_EXIT_READ_DR0;

	if (dr >= 16) { /* mov to DRn */
4011 4012
		if (!kvm_require_dr(&svm->vcpu, dr - 16))
			return 1;
4013 4014 4015
		val = kvm_register_read(&svm->vcpu, reg);
		kvm_set_dr(&svm->vcpu, dr - 16, val);
	} else {
4016 4017 4018 4019
		if (!kvm_require_dr(&svm->vcpu, dr))
			return 1;
		kvm_get_dr(&svm->vcpu, dr, &val);
		kvm_register_write(&svm->vcpu, reg, val);
4020 4021
	}

4022
	return kvm_skip_emulated_instruction(&svm->vcpu);
4023 4024
}

A
Avi Kivity 已提交
4025
static int cr8_write_interception(struct vcpu_svm *svm)
4026
{
A
Avi Kivity 已提交
4027
	struct kvm_run *kvm_run = svm->vcpu.run;
A
Andre Przywara 已提交
4028
	int r;
A
Avi Kivity 已提交
4029

4030 4031
	u8 cr8_prev = kvm_get_cr8(&svm->vcpu);
	/* instruction emulation calls kvm_set_cr8() */
4032
	r = cr_interception(svm);
4033
	if (lapic_in_kernel(&svm->vcpu))
4034
		return r;
4035
	if (cr8_prev <= kvm_get_cr8(&svm->vcpu))
4036
		return r;
4037 4038 4039 4040
	kvm_run->exit_reason = KVM_EXIT_SET_TPR;
	return 0;
}

4041 4042
static int svm_get_msr_feature(struct kvm_msr_entry *msr)
{
4043 4044 4045 4046 4047 4048 4049 4050 4051 4052 4053 4054
	msr->data = 0;

	switch (msr->index) {
	case MSR_F10H_DECFG:
		if (boot_cpu_has(X86_FEATURE_LFENCE_RDTSC))
			msr->data |= MSR_F10H_DECFG_LFENCE_SERIALIZE;
		break;
	default:
		return 1;
	}

	return 0;
4055 4056
}

4057
static int svm_get_msr(struct kvm_vcpu *vcpu, struct msr_data *msr_info)
A
Avi Kivity 已提交
4058
{
4059 4060
	struct vcpu_svm *svm = to_svm(vcpu);

4061
	switch (msr_info->index) {
B
Brian Gerst 已提交
4062
	case MSR_STAR:
4063
		msr_info->data = svm->vmcb->save.star;
A
Avi Kivity 已提交
4064
		break;
4065
#ifdef CONFIG_X86_64
A
Avi Kivity 已提交
4066
	case MSR_LSTAR:
4067
		msr_info->data = svm->vmcb->save.lstar;
A
Avi Kivity 已提交
4068 4069
		break;
	case MSR_CSTAR:
4070
		msr_info->data = svm->vmcb->save.cstar;
A
Avi Kivity 已提交
4071 4072
		break;
	case MSR_KERNEL_GS_BASE:
4073
		msr_info->data = svm->vmcb->save.kernel_gs_base;
A
Avi Kivity 已提交
4074 4075
		break;
	case MSR_SYSCALL_MASK:
4076
		msr_info->data = svm->vmcb->save.sfmask;
A
Avi Kivity 已提交
4077 4078 4079
		break;
#endif
	case MSR_IA32_SYSENTER_CS:
4080
		msr_info->data = svm->vmcb->save.sysenter_cs;
A
Avi Kivity 已提交
4081 4082
		break;
	case MSR_IA32_SYSENTER_EIP:
4083
		msr_info->data = svm->sysenter_eip;
A
Avi Kivity 已提交
4084 4085
		break;
	case MSR_IA32_SYSENTER_ESP:
4086
		msr_info->data = svm->sysenter_esp;
A
Avi Kivity 已提交
4087
		break;
P
Paolo Bonzini 已提交
4088 4089 4090 4091 4092
	case MSR_TSC_AUX:
		if (!boot_cpu_has(X86_FEATURE_RDTSCP))
			return 1;
		msr_info->data = svm->tsc_aux;
		break;
J
Joerg Roedel 已提交
4093 4094 4095 4096 4097
	/*
	 * Nobody will change the following 5 values in the VMCB so we can
	 * safely return them on rdmsr. They will always be 0 until LBRV is
	 * implemented.
	 */
4098
	case MSR_IA32_DEBUGCTLMSR:
4099
		msr_info->data = svm->vmcb->save.dbgctl;
4100 4101
		break;
	case MSR_IA32_LASTBRANCHFROMIP:
4102
		msr_info->data = svm->vmcb->save.br_from;
4103 4104
		break;
	case MSR_IA32_LASTBRANCHTOIP:
4105
		msr_info->data = svm->vmcb->save.br_to;
4106 4107
		break;
	case MSR_IA32_LASTINTFROMIP:
4108
		msr_info->data = svm->vmcb->save.last_excp_from;
4109 4110
		break;
	case MSR_IA32_LASTINTTOIP:
4111
		msr_info->data = svm->vmcb->save.last_excp_to;
4112
		break;
A
Alexander Graf 已提交
4113
	case MSR_VM_HSAVE_PA:
4114
		msr_info->data = svm->nested.hsave_msr;
A
Alexander Graf 已提交
4115
		break;
4116
	case MSR_VM_CR:
4117
		msr_info->data = svm->nested.vm_cr_msr;
4118
		break;
4119 4120
	case MSR_IA32_SPEC_CTRL:
		if (!msr_info->host_initiated &&
4121 4122
		    !guest_cpuid_has(vcpu, X86_FEATURE_AMD_IBRS) &&
		    !guest_cpuid_has(vcpu, X86_FEATURE_AMD_SSBD))
4123 4124 4125 4126
			return 1;

		msr_info->data = svm->spec_ctrl;
		break;
4127 4128 4129 4130 4131 4132 4133
	case MSR_AMD64_VIRT_SPEC_CTRL:
		if (!msr_info->host_initiated &&
		    !guest_cpuid_has(vcpu, X86_FEATURE_VIRT_SSBD))
			return 1;

		msr_info->data = svm->virt_spec_ctrl;
		break;
4134 4135 4136 4137 4138 4139 4140 4141 4142 4143 4144 4145 4146 4147 4148 4149 4150
	case MSR_F15H_IC_CFG: {

		int family, model;

		family = guest_cpuid_family(vcpu);
		model  = guest_cpuid_model(vcpu);

		if (family < 0 || model < 0)
			return kvm_get_msr_common(vcpu, msr_info);

		msr_info->data = 0;

		if (family == 0x15 &&
		    (model >= 0x2 && model < 0x20))
			msr_info->data = 0x1E;
		}
		break;
4151 4152 4153
	case MSR_F10H_DECFG:
		msr_info->data = svm->msr_decfg;
		break;
A
Avi Kivity 已提交
4154
	default:
4155
		return kvm_get_msr_common(vcpu, msr_info);
A
Avi Kivity 已提交
4156 4157 4158 4159
	}
	return 0;
}

A
Avi Kivity 已提交
4160
static int rdmsr_interception(struct vcpu_svm *svm)
A
Avi Kivity 已提交
4161
{
4162
	u32 ecx = kvm_register_read(&svm->vcpu, VCPU_REGS_RCX);
4163
	struct msr_data msr_info;
A
Avi Kivity 已提交
4164

4165 4166 4167
	msr_info.index = ecx;
	msr_info.host_initiated = false;
	if (svm_get_msr(&svm->vcpu, &msr_info)) {
4168
		trace_kvm_msr_read_ex(ecx);
4169
		kvm_inject_gp(&svm->vcpu, 0);
4170
		return 1;
4171
	} else {
4172
		trace_kvm_msr_read(ecx, msr_info.data);
4173

4174 4175 4176 4177
		kvm_register_write(&svm->vcpu, VCPU_REGS_RAX,
				   msr_info.data & 0xffffffff);
		kvm_register_write(&svm->vcpu, VCPU_REGS_RDX,
				   msr_info.data >> 32);
4178
		svm->next_rip = kvm_rip_read(&svm->vcpu) + 2;
4179
		return kvm_skip_emulated_instruction(&svm->vcpu);
A
Avi Kivity 已提交
4180 4181 4182
	}
}

4183 4184 4185 4186 4187 4188 4189 4190 4191 4192 4193 4194 4195 4196 4197 4198 4199 4200 4201 4202 4203 4204 4205 4206 4207
static int svm_set_vm_cr(struct kvm_vcpu *vcpu, u64 data)
{
	struct vcpu_svm *svm = to_svm(vcpu);
	int svm_dis, chg_mask;

	if (data & ~SVM_VM_CR_VALID_MASK)
		return 1;

	chg_mask = SVM_VM_CR_VALID_MASK;

	if (svm->nested.vm_cr_msr & SVM_VM_CR_SVM_DIS_MASK)
		chg_mask &= ~(SVM_VM_CR_SVM_LOCK_MASK | SVM_VM_CR_SVM_DIS_MASK);

	svm->nested.vm_cr_msr &= ~chg_mask;
	svm->nested.vm_cr_msr |= (data & chg_mask);

	svm_dis = svm->nested.vm_cr_msr & SVM_VM_CR_SVM_DIS_MASK;

	/* check for svm_disable while efer.svme is set */
	if (svm_dis && (vcpu->arch.efer & EFER_SVME))
		return 1;

	return 0;
}

4208
static int svm_set_msr(struct kvm_vcpu *vcpu, struct msr_data *msr)
A
Avi Kivity 已提交
4209
{
4210 4211
	struct vcpu_svm *svm = to_svm(vcpu);

4212 4213
	u32 ecx = msr->index;
	u64 data = msr->data;
A
Avi Kivity 已提交
4214
	switch (ecx) {
P
Paolo Bonzini 已提交
4215 4216 4217 4218 4219 4220 4221
	case MSR_IA32_CR_PAT:
		if (!kvm_mtrr_valid(vcpu, MSR_IA32_CR_PAT, data))
			return 1;
		vcpu->arch.pat = data;
		svm->vmcb->save.g_pat = data;
		mark_dirty(svm->vmcb, VMCB_NPT);
		break;
4222 4223
	case MSR_IA32_SPEC_CTRL:
		if (!msr->host_initiated &&
4224 4225
		    !guest_cpuid_has(vcpu, X86_FEATURE_AMD_IBRS) &&
		    !guest_cpuid_has(vcpu, X86_FEATURE_AMD_SSBD))
4226 4227 4228
			return 1;

		/* The STIBP bit doesn't fault even if it's not advertised */
4229
		if (data & ~(SPEC_CTRL_IBRS | SPEC_CTRL_STIBP | SPEC_CTRL_SSBD))
4230 4231 4232 4233 4234 4235 4236 4237 4238 4239 4240 4241 4242 4243 4244 4245 4246 4247 4248 4249
			return 1;

		svm->spec_ctrl = data;

		if (!data)
			break;

		/*
		 * For non-nested:
		 * When it's written (to non-zero) for the first time, pass
		 * it through.
		 *
		 * For nested:
		 * The handling of the MSR bitmap for L2 guests is done in
		 * nested_svm_vmrun_msrpm.
		 * We update the L1 MSR bit as well since it will end up
		 * touching the MSR anyway now.
		 */
		set_msr_interception(svm->msrpm, MSR_IA32_SPEC_CTRL, 1, 1);
		break;
A
Ashok Raj 已提交
4250 4251
	case MSR_IA32_PRED_CMD:
		if (!msr->host_initiated &&
4252
		    !guest_cpuid_has(vcpu, X86_FEATURE_AMD_IBPB))
A
Ashok Raj 已提交
4253 4254 4255 4256 4257 4258 4259 4260 4261 4262 4263 4264 4265
			return 1;

		if (data & ~PRED_CMD_IBPB)
			return 1;

		if (!data)
			break;

		wrmsrl(MSR_IA32_PRED_CMD, PRED_CMD_IBPB);
		if (is_guest_mode(vcpu))
			break;
		set_msr_interception(svm->msrpm, MSR_IA32_PRED_CMD, 0, 1);
		break;
4266 4267 4268 4269 4270 4271 4272 4273 4274 4275
	case MSR_AMD64_VIRT_SPEC_CTRL:
		if (!msr->host_initiated &&
		    !guest_cpuid_has(vcpu, X86_FEATURE_VIRT_SSBD))
			return 1;

		if (data & ~SPEC_CTRL_SSBD)
			return 1;

		svm->virt_spec_ctrl = data;
		break;
B
Brian Gerst 已提交
4276
	case MSR_STAR:
4277
		svm->vmcb->save.star = data;
A
Avi Kivity 已提交
4278
		break;
4279
#ifdef CONFIG_X86_64
A
Avi Kivity 已提交
4280
	case MSR_LSTAR:
4281
		svm->vmcb->save.lstar = data;
A
Avi Kivity 已提交
4282 4283
		break;
	case MSR_CSTAR:
4284
		svm->vmcb->save.cstar = data;
A
Avi Kivity 已提交
4285 4286
		break;
	case MSR_KERNEL_GS_BASE:
4287
		svm->vmcb->save.kernel_gs_base = data;
A
Avi Kivity 已提交
4288 4289
		break;
	case MSR_SYSCALL_MASK:
4290
		svm->vmcb->save.sfmask = data;
A
Avi Kivity 已提交
4291 4292 4293
		break;
#endif
	case MSR_IA32_SYSENTER_CS:
4294
		svm->vmcb->save.sysenter_cs = data;
A
Avi Kivity 已提交
4295 4296
		break;
	case MSR_IA32_SYSENTER_EIP:
4297
		svm->sysenter_eip = data;
4298
		svm->vmcb->save.sysenter_eip = data;
A
Avi Kivity 已提交
4299 4300
		break;
	case MSR_IA32_SYSENTER_ESP:
4301
		svm->sysenter_esp = data;
4302
		svm->vmcb->save.sysenter_esp = data;
A
Avi Kivity 已提交
4303
		break;
P
Paolo Bonzini 已提交
4304 4305 4306 4307 4308 4309 4310 4311 4312 4313 4314 4315
	case MSR_TSC_AUX:
		if (!boot_cpu_has(X86_FEATURE_RDTSCP))
			return 1;

		/*
		 * This is rare, so we update the MSR here instead of using
		 * direct_access_msrs.  Doing that would require a rdmsr in
		 * svm_vcpu_put.
		 */
		svm->tsc_aux = data;
		wrmsrl(MSR_TSC_AUX, svm->tsc_aux);
		break;
4316
	case MSR_IA32_DEBUGCTLMSR:
4317
		if (!boot_cpu_has(X86_FEATURE_LBRV)) {
4318 4319
			vcpu_unimpl(vcpu, "%s: MSR_IA32_DEBUGCTL 0x%llx, nop\n",
				    __func__, data);
4320 4321 4322 4323 4324 4325
			break;
		}
		if (data & DEBUGCTL_RESERVED_BITS)
			return 1;

		svm->vmcb->save.dbgctl = data;
4326
		mark_dirty(svm->vmcb, VMCB_LBR);
4327 4328 4329 4330
		if (data & (1ULL<<0))
			svm_enable_lbrv(svm);
		else
			svm_disable_lbrv(svm);
4331
		break;
A
Alexander Graf 已提交
4332
	case MSR_VM_HSAVE_PA:
4333
		svm->nested.hsave_msr = data;
4334
		break;
4335
	case MSR_VM_CR:
4336
		return svm_set_vm_cr(vcpu, data);
4337
	case MSR_VM_IGNNE:
4338
		vcpu_unimpl(vcpu, "unimplemented wrmsr: 0x%x data 0x%llx\n", ecx, data);
4339
		break;
4340 4341 4342 4343 4344 4345 4346 4347 4348 4349 4350 4351 4352 4353 4354 4355 4356 4357
	case MSR_F10H_DECFG: {
		struct kvm_msr_entry msr_entry;

		msr_entry.index = msr->index;
		if (svm_get_msr_feature(&msr_entry))
			return 1;

		/* Check the supported bits */
		if (data & ~msr_entry.data)
			return 1;

		/* Don't allow the guest to change a bit, #GP */
		if (!msr->host_initiated && (data ^ msr_entry.data))
			return 1;

		svm->msr_decfg = data;
		break;
	}
4358 4359 4360 4361
	case MSR_IA32_APICBASE:
		if (kvm_vcpu_apicv_active(vcpu))
			avic_update_vapic_bar(to_svm(vcpu), data);
		/* Follow through */
A
Avi Kivity 已提交
4362
	default:
4363
		return kvm_set_msr_common(vcpu, msr);
A
Avi Kivity 已提交
4364 4365 4366 4367
	}
	return 0;
}

A
Avi Kivity 已提交
4368
static int wrmsr_interception(struct vcpu_svm *svm)
A
Avi Kivity 已提交
4369
{
4370
	struct msr_data msr;
4371 4372
	u32 ecx = kvm_register_read(&svm->vcpu, VCPU_REGS_RCX);
	u64 data = kvm_read_edx_eax(&svm->vcpu);
4373

4374 4375 4376
	msr.data = data;
	msr.index = ecx;
	msr.host_initiated = false;
4377

4378
	svm->next_rip = kvm_rip_read(&svm->vcpu) + 2;
4379
	if (kvm_set_msr(&svm->vcpu, &msr)) {
4380
		trace_kvm_msr_write_ex(ecx, data);
4381
		kvm_inject_gp(&svm->vcpu, 0);
4382
		return 1;
4383 4384
	} else {
		trace_kvm_msr_write(ecx, data);
4385
		return kvm_skip_emulated_instruction(&svm->vcpu);
4386
	}
A
Avi Kivity 已提交
4387 4388
}

A
Avi Kivity 已提交
4389
static int msr_interception(struct vcpu_svm *svm)
A
Avi Kivity 已提交
4390
{
R
Rusty Russell 已提交
4391
	if (svm->vmcb->control.exit_info_1)
A
Avi Kivity 已提交
4392
		return wrmsr_interception(svm);
A
Avi Kivity 已提交
4393
	else
A
Avi Kivity 已提交
4394
		return rdmsr_interception(svm);
A
Avi Kivity 已提交
4395 4396
}

A
Avi Kivity 已提交
4397
static int interrupt_window_interception(struct vcpu_svm *svm)
4398
{
4399
	kvm_make_request(KVM_REQ_EVENT, &svm->vcpu);
4400
	svm_clear_vintr(svm);
4401
	svm->vmcb->control.int_ctl &= ~V_IRQ_MASK;
4402
	mark_dirty(svm->vmcb, VMCB_INTR);
4403
	++svm->vcpu.stat.irq_window_exits;
4404 4405 4406
	return 1;
}

4407 4408
static int pause_interception(struct vcpu_svm *svm)
{
4409 4410 4411
	struct kvm_vcpu *vcpu = &svm->vcpu;
	bool in_kernel = (svm_get_cpl(vcpu) == 0);

4412 4413 4414
	if (pause_filter_thresh)
		grow_ple_window(vcpu);

4415
	kvm_vcpu_on_spin(vcpu, in_kernel);
4416 4417 4418
	return 1;
}

4419 4420
static int nop_interception(struct vcpu_svm *svm)
{
4421
	return kvm_skip_emulated_instruction(&(svm->vcpu));
4422 4423 4424 4425 4426 4427 4428 4429 4430 4431 4432 4433 4434 4435
}

static int monitor_interception(struct vcpu_svm *svm)
{
	printk_once(KERN_WARNING "kvm: MONITOR instruction emulated as NOP!\n");
	return nop_interception(svm);
}

static int mwait_interception(struct vcpu_svm *svm)
{
	printk_once(KERN_WARNING "kvm: MWAIT instruction emulated as NOP!\n");
	return nop_interception(svm);
}

4436 4437 4438 4439 4440 4441 4442 4443 4444 4445 4446 4447
enum avic_ipi_failure_cause {
	AVIC_IPI_FAILURE_INVALID_INT_TYPE,
	AVIC_IPI_FAILURE_TARGET_NOT_RUNNING,
	AVIC_IPI_FAILURE_INVALID_TARGET,
	AVIC_IPI_FAILURE_INVALID_BACKING_PAGE,
};

static int avic_incomplete_ipi_interception(struct vcpu_svm *svm)
{
	u32 icrh = svm->vmcb->control.exit_info_1 >> 32;
	u32 icrl = svm->vmcb->control.exit_info_1;
	u32 id = svm->vmcb->control.exit_info_2 >> 32;
D
Dan Carpenter 已提交
4448
	u32 index = svm->vmcb->control.exit_info_2 & 0xFF;
4449 4450 4451 4452 4453 4454 4455 4456 4457 4458 4459 4460 4461 4462 4463 4464 4465 4466 4467 4468 4469 4470 4471 4472 4473 4474 4475 4476 4477 4478 4479 4480 4481 4482 4483 4484 4485 4486 4487 4488 4489 4490 4491 4492 4493 4494 4495 4496 4497 4498 4499 4500 4501 4502 4503 4504
	struct kvm_lapic *apic = svm->vcpu.arch.apic;

	trace_kvm_avic_incomplete_ipi(svm->vcpu.vcpu_id, icrh, icrl, id, index);

	switch (id) {
	case AVIC_IPI_FAILURE_INVALID_INT_TYPE:
		/*
		 * AVIC hardware handles the generation of
		 * IPIs when the specified Message Type is Fixed
		 * (also known as fixed delivery mode) and
		 * the Trigger Mode is edge-triggered. The hardware
		 * also supports self and broadcast delivery modes
		 * specified via the Destination Shorthand(DSH)
		 * field of the ICRL. Logical and physical APIC ID
		 * formats are supported. All other IPI types cause
		 * a #VMEXIT, which needs to emulated.
		 */
		kvm_lapic_reg_write(apic, APIC_ICR2, icrh);
		kvm_lapic_reg_write(apic, APIC_ICR, icrl);
		break;
	case AVIC_IPI_FAILURE_TARGET_NOT_RUNNING: {
		int i;
		struct kvm_vcpu *vcpu;
		struct kvm *kvm = svm->vcpu.kvm;
		struct kvm_lapic *apic = svm->vcpu.arch.apic;

		/*
		 * At this point, we expect that the AVIC HW has already
		 * set the appropriate IRR bits on the valid target
		 * vcpus. So, we just need to kick the appropriate vcpu.
		 */
		kvm_for_each_vcpu(i, vcpu, kvm) {
			bool m = kvm_apic_match_dest(vcpu, apic,
						     icrl & KVM_APIC_SHORT_MASK,
						     GET_APIC_DEST_FIELD(icrh),
						     icrl & KVM_APIC_DEST_MASK);

			if (m && !avic_vcpu_is_running(vcpu))
				kvm_vcpu_wake_up(vcpu);
		}
		break;
	}
	case AVIC_IPI_FAILURE_INVALID_TARGET:
		break;
	case AVIC_IPI_FAILURE_INVALID_BACKING_PAGE:
		WARN_ONCE(1, "Invalid backing page\n");
		break;
	default:
		pr_err("Unknown IPI interception\n");
	}

	return 1;
}

static u32 *avic_get_logical_id_entry(struct kvm_vcpu *vcpu, u32 ldr, bool flat)
{
4505
	struct kvm_svm *kvm_svm = to_kvm_svm(vcpu->kvm);
4506 4507 4508 4509 4510 4511 4512 4513 4514 4515 4516 4517 4518 4519 4520 4521 4522 4523 4524 4525 4526
	int index;
	u32 *logical_apic_id_table;
	int dlid = GET_APIC_LOGICAL_ID(ldr);

	if (!dlid)
		return NULL;

	if (flat) { /* flat */
		index = ffs(dlid) - 1;
		if (index > 7)
			return NULL;
	} else { /* cluster */
		int cluster = (dlid & 0xf0) >> 4;
		int apic = ffs(dlid & 0x0f) - 1;

		if ((apic < 0) || (apic > 7) ||
		    (cluster >= 0xf))
			return NULL;
		index = (cluster << 2) + apic;
	}

4527
	logical_apic_id_table = (u32 *) page_address(kvm_svm->avic_logical_id_table_page);
4528 4529 4530 4531 4532 4533 4534 4535 4536 4537 4538 4539 4540 4541 4542 4543 4544 4545 4546 4547 4548 4549 4550 4551 4552 4553 4554 4555 4556 4557 4558 4559 4560 4561 4562 4563 4564 4565 4566 4567 4568 4569 4570 4571 4572 4573 4574 4575 4576 4577 4578 4579 4580 4581 4582 4583 4584 4585 4586 4587 4588 4589 4590 4591 4592 4593 4594 4595 4596 4597 4598 4599 4600 4601 4602 4603 4604 4605 4606

	return &logical_apic_id_table[index];
}

static int avic_ldr_write(struct kvm_vcpu *vcpu, u8 g_physical_id, u32 ldr,
			  bool valid)
{
	bool flat;
	u32 *entry, new_entry;

	flat = kvm_lapic_get_reg(vcpu->arch.apic, APIC_DFR) == APIC_DFR_FLAT;
	entry = avic_get_logical_id_entry(vcpu, ldr, flat);
	if (!entry)
		return -EINVAL;

	new_entry = READ_ONCE(*entry);
	new_entry &= ~AVIC_LOGICAL_ID_ENTRY_GUEST_PHYSICAL_ID_MASK;
	new_entry |= (g_physical_id & AVIC_LOGICAL_ID_ENTRY_GUEST_PHYSICAL_ID_MASK);
	if (valid)
		new_entry |= AVIC_LOGICAL_ID_ENTRY_VALID_MASK;
	else
		new_entry &= ~AVIC_LOGICAL_ID_ENTRY_VALID_MASK;
	WRITE_ONCE(*entry, new_entry);

	return 0;
}

static int avic_handle_ldr_update(struct kvm_vcpu *vcpu)
{
	int ret;
	struct vcpu_svm *svm = to_svm(vcpu);
	u32 ldr = kvm_lapic_get_reg(vcpu->arch.apic, APIC_LDR);

	if (!ldr)
		return 1;

	ret = avic_ldr_write(vcpu, vcpu->vcpu_id, ldr, true);
	if (ret && svm->ldr_reg) {
		avic_ldr_write(vcpu, 0, svm->ldr_reg, false);
		svm->ldr_reg = 0;
	} else {
		svm->ldr_reg = ldr;
	}
	return ret;
}

static int avic_handle_apic_id_update(struct kvm_vcpu *vcpu)
{
	u64 *old, *new;
	struct vcpu_svm *svm = to_svm(vcpu);
	u32 apic_id_reg = kvm_lapic_get_reg(vcpu->arch.apic, APIC_ID);
	u32 id = (apic_id_reg >> 24) & 0xff;

	if (vcpu->vcpu_id == id)
		return 0;

	old = avic_get_physical_id_entry(vcpu, vcpu->vcpu_id);
	new = avic_get_physical_id_entry(vcpu, id);
	if (!new || !old)
		return 1;

	/* We need to move physical_id_entry to new offset */
	*new = *old;
	*old = 0ULL;
	to_svm(vcpu)->avic_physical_id_cache = new;

	/*
	 * Also update the guest physical APIC ID in the logical
	 * APIC ID table entry if already setup the LDR.
	 */
	if (svm->ldr_reg)
		avic_handle_ldr_update(vcpu);

	return 0;
}

static int avic_handle_dfr_update(struct kvm_vcpu *vcpu)
{
	struct vcpu_svm *svm = to_svm(vcpu);
4607
	struct kvm_svm *kvm_svm = to_kvm_svm(vcpu->kvm);
4608 4609 4610 4611 4612 4613 4614 4615
	u32 dfr = kvm_lapic_get_reg(vcpu->arch.apic, APIC_DFR);
	u32 mod = (dfr >> 28) & 0xf;

	/*
	 * We assume that all local APICs are using the same type.
	 * If this changes, we need to flush the AVIC logical
	 * APID id table.
	 */
4616
	if (kvm_svm->ldr_mode == mod)
4617 4618
		return 0;

4619 4620
	clear_page(page_address(kvm_svm->avic_logical_id_table_page));
	kvm_svm->ldr_mode = mod;
4621 4622 4623 4624 4625 4626 4627 4628 4629 4630 4631 4632 4633 4634 4635 4636 4637 4638 4639 4640 4641 4642 4643 4644 4645 4646 4647 4648 4649 4650 4651 4652 4653 4654 4655 4656 4657 4658 4659 4660 4661 4662 4663 4664 4665 4666 4667 4668 4669 4670 4671 4672 4673 4674 4675 4676 4677 4678 4679 4680 4681 4682 4683 4684 4685 4686 4687 4688 4689 4690 4691 4692 4693 4694 4695 4696 4697 4698 4699 4700 4701

	if (svm->ldr_reg)
		avic_handle_ldr_update(vcpu);
	return 0;
}

static int avic_unaccel_trap_write(struct vcpu_svm *svm)
{
	struct kvm_lapic *apic = svm->vcpu.arch.apic;
	u32 offset = svm->vmcb->control.exit_info_1 &
				AVIC_UNACCEL_ACCESS_OFFSET_MASK;

	switch (offset) {
	case APIC_ID:
		if (avic_handle_apic_id_update(&svm->vcpu))
			return 0;
		break;
	case APIC_LDR:
		if (avic_handle_ldr_update(&svm->vcpu))
			return 0;
		break;
	case APIC_DFR:
		avic_handle_dfr_update(&svm->vcpu);
		break;
	default:
		break;
	}

	kvm_lapic_reg_write(apic, offset, kvm_lapic_get_reg(apic, offset));

	return 1;
}

static bool is_avic_unaccelerated_access_trap(u32 offset)
{
	bool ret = false;

	switch (offset) {
	case APIC_ID:
	case APIC_EOI:
	case APIC_RRR:
	case APIC_LDR:
	case APIC_DFR:
	case APIC_SPIV:
	case APIC_ESR:
	case APIC_ICR:
	case APIC_LVTT:
	case APIC_LVTTHMR:
	case APIC_LVTPC:
	case APIC_LVT0:
	case APIC_LVT1:
	case APIC_LVTERR:
	case APIC_TMICT:
	case APIC_TDCR:
		ret = true;
		break;
	default:
		break;
	}
	return ret;
}

static int avic_unaccelerated_access_interception(struct vcpu_svm *svm)
{
	int ret = 0;
	u32 offset = svm->vmcb->control.exit_info_1 &
		     AVIC_UNACCEL_ACCESS_OFFSET_MASK;
	u32 vector = svm->vmcb->control.exit_info_2 &
		     AVIC_UNACCEL_ACCESS_VECTOR_MASK;
	bool write = (svm->vmcb->control.exit_info_1 >> 32) &
		     AVIC_UNACCEL_ACCESS_WRITE_MASK;
	bool trap = is_avic_unaccelerated_access_trap(offset);

	trace_kvm_avic_unaccelerated_access(svm->vcpu.vcpu_id, offset,
					    trap, write, vector);
	if (trap) {
		/* Handling Trap */
		WARN_ONCE(!write, "svm: Handling trap read.\n");
		ret = avic_unaccel_trap_write(svm);
	} else {
		/* Handling Fault */
4702
		ret = (kvm_emulate_instruction(&svm->vcpu, 0) == EMULATE_DONE);
4703 4704 4705 4706 4707
	}

	return ret;
}

4708
static int (*const svm_exit_handlers[])(struct vcpu_svm *svm) = {
4709 4710 4711 4712
	[SVM_EXIT_READ_CR0]			= cr_interception,
	[SVM_EXIT_READ_CR3]			= cr_interception,
	[SVM_EXIT_READ_CR4]			= cr_interception,
	[SVM_EXIT_READ_CR8]			= cr_interception,
4713
	[SVM_EXIT_CR0_SEL_WRITE]		= cr_interception,
4714
	[SVM_EXIT_WRITE_CR0]			= cr_interception,
4715 4716
	[SVM_EXIT_WRITE_CR3]			= cr_interception,
	[SVM_EXIT_WRITE_CR4]			= cr_interception,
J
Joerg Roedel 已提交
4717
	[SVM_EXIT_WRITE_CR8]			= cr8_write_interception,
4718 4719 4720 4721 4722 4723 4724 4725 4726 4727 4728 4729 4730 4731 4732 4733
	[SVM_EXIT_READ_DR0]			= dr_interception,
	[SVM_EXIT_READ_DR1]			= dr_interception,
	[SVM_EXIT_READ_DR2]			= dr_interception,
	[SVM_EXIT_READ_DR3]			= dr_interception,
	[SVM_EXIT_READ_DR4]			= dr_interception,
	[SVM_EXIT_READ_DR5]			= dr_interception,
	[SVM_EXIT_READ_DR6]			= dr_interception,
	[SVM_EXIT_READ_DR7]			= dr_interception,
	[SVM_EXIT_WRITE_DR0]			= dr_interception,
	[SVM_EXIT_WRITE_DR1]			= dr_interception,
	[SVM_EXIT_WRITE_DR2]			= dr_interception,
	[SVM_EXIT_WRITE_DR3]			= dr_interception,
	[SVM_EXIT_WRITE_DR4]			= dr_interception,
	[SVM_EXIT_WRITE_DR5]			= dr_interception,
	[SVM_EXIT_WRITE_DR6]			= dr_interception,
	[SVM_EXIT_WRITE_DR7]			= dr_interception,
J
Jan Kiszka 已提交
4734 4735
	[SVM_EXIT_EXCP_BASE + DB_VECTOR]	= db_interception,
	[SVM_EXIT_EXCP_BASE + BP_VECTOR]	= bp_interception,
4736
	[SVM_EXIT_EXCP_BASE + UD_VECTOR]	= ud_interception,
J
Joerg Roedel 已提交
4737 4738
	[SVM_EXIT_EXCP_BASE + PF_VECTOR]	= pf_interception,
	[SVM_EXIT_EXCP_BASE + MC_VECTOR]	= mc_interception,
4739
	[SVM_EXIT_EXCP_BASE + AC_VECTOR]	= ac_interception,
4740
	[SVM_EXIT_EXCP_BASE + GP_VECTOR]	= gp_interception,
J
Joerg Roedel 已提交
4741
	[SVM_EXIT_INTR]				= intr_interception,
4742
	[SVM_EXIT_NMI]				= nmi_interception,
A
Avi Kivity 已提交
4743 4744
	[SVM_EXIT_SMI]				= nop_on_interception,
	[SVM_EXIT_INIT]				= nop_on_interception,
4745
	[SVM_EXIT_VINTR]			= interrupt_window_interception,
A
Avi Kivity 已提交
4746
	[SVM_EXIT_RDPMC]			= rdpmc_interception,
A
Avi Kivity 已提交
4747
	[SVM_EXIT_CPUID]			= cpuid_interception,
4748
	[SVM_EXIT_IRET]                         = iret_interception,
4749
	[SVM_EXIT_INVD]                         = emulate_on_interception,
4750
	[SVM_EXIT_PAUSE]			= pause_interception,
A
Avi Kivity 已提交
4751
	[SVM_EXIT_HLT]				= halt_interception,
M
Marcelo Tosatti 已提交
4752
	[SVM_EXIT_INVLPG]			= invlpg_interception,
A
Alexander Graf 已提交
4753
	[SVM_EXIT_INVLPGA]			= invlpga_interception,
J
Joerg Roedel 已提交
4754
	[SVM_EXIT_IOIO]				= io_interception,
A
Avi Kivity 已提交
4755 4756
	[SVM_EXIT_MSR]				= msr_interception,
	[SVM_EXIT_TASK_SWITCH]			= task_switch_interception,
4757
	[SVM_EXIT_SHUTDOWN]			= shutdown_interception,
A
Alexander Graf 已提交
4758
	[SVM_EXIT_VMRUN]			= vmrun_interception,
4759
	[SVM_EXIT_VMMCALL]			= vmmcall_interception,
4760 4761
	[SVM_EXIT_VMLOAD]			= vmload_interception,
	[SVM_EXIT_VMSAVE]			= vmsave_interception,
4762 4763
	[SVM_EXIT_STGI]				= stgi_interception,
	[SVM_EXIT_CLGI]				= clgi_interception,
4764
	[SVM_EXIT_SKINIT]			= skinit_interception,
D
David Kaplan 已提交
4765
	[SVM_EXIT_WBINVD]                       = wbinvd_interception,
4766 4767
	[SVM_EXIT_MONITOR]			= monitor_interception,
	[SVM_EXIT_MWAIT]			= mwait_interception,
J
Joerg Roedel 已提交
4768
	[SVM_EXIT_XSETBV]			= xsetbv_interception,
4769
	[SVM_EXIT_NPF]				= npf_interception,
B
Brijesh Singh 已提交
4770
	[SVM_EXIT_RSM]                          = rsm_interception,
4771 4772
	[SVM_EXIT_AVIC_INCOMPLETE_IPI]		= avic_incomplete_ipi_interception,
	[SVM_EXIT_AVIC_UNACCELERATED_ACCESS]	= avic_unaccelerated_access_interception,
A
Avi Kivity 已提交
4773 4774
};

4775
static void dump_vmcb(struct kvm_vcpu *vcpu)
4776 4777 4778 4779 4780 4781
{
	struct vcpu_svm *svm = to_svm(vcpu);
	struct vmcb_control_area *control = &svm->vmcb->control;
	struct vmcb_save_area *save = &svm->vmcb->save;

	pr_err("VMCB Control Area:\n");
4782 4783 4784 4785 4786 4787 4788
	pr_err("%-20s%04x\n", "cr_read:", control->intercept_cr & 0xffff);
	pr_err("%-20s%04x\n", "cr_write:", control->intercept_cr >> 16);
	pr_err("%-20s%04x\n", "dr_read:", control->intercept_dr & 0xffff);
	pr_err("%-20s%04x\n", "dr_write:", control->intercept_dr >> 16);
	pr_err("%-20s%08x\n", "exceptions:", control->intercept_exceptions);
	pr_err("%-20s%016llx\n", "intercepts:", control->intercept);
	pr_err("%-20s%d\n", "pause filter count:", control->pause_filter_count);
4789 4790
	pr_err("%-20s%d\n", "pause filter threshold:",
	       control->pause_filter_thresh);
4791 4792 4793 4794 4795 4796 4797 4798 4799 4800 4801 4802 4803 4804 4805
	pr_err("%-20s%016llx\n", "iopm_base_pa:", control->iopm_base_pa);
	pr_err("%-20s%016llx\n", "msrpm_base_pa:", control->msrpm_base_pa);
	pr_err("%-20s%016llx\n", "tsc_offset:", control->tsc_offset);
	pr_err("%-20s%d\n", "asid:", control->asid);
	pr_err("%-20s%d\n", "tlb_ctl:", control->tlb_ctl);
	pr_err("%-20s%08x\n", "int_ctl:", control->int_ctl);
	pr_err("%-20s%08x\n", "int_vector:", control->int_vector);
	pr_err("%-20s%08x\n", "int_state:", control->int_state);
	pr_err("%-20s%08x\n", "exit_code:", control->exit_code);
	pr_err("%-20s%016llx\n", "exit_info1:", control->exit_info_1);
	pr_err("%-20s%016llx\n", "exit_info2:", control->exit_info_2);
	pr_err("%-20s%08x\n", "exit_int_info:", control->exit_int_info);
	pr_err("%-20s%08x\n", "exit_int_info_err:", control->exit_int_info_err);
	pr_err("%-20s%lld\n", "nested_ctl:", control->nested_ctl);
	pr_err("%-20s%016llx\n", "nested_cr3:", control->nested_cr3);
4806
	pr_err("%-20s%016llx\n", "avic_vapic_bar:", control->avic_vapic_bar);
4807 4808
	pr_err("%-20s%08x\n", "event_inj:", control->event_inj);
	pr_err("%-20s%08x\n", "event_inj_err:", control->event_inj_err);
4809
	pr_err("%-20s%lld\n", "virt_ext:", control->virt_ext);
4810
	pr_err("%-20s%016llx\n", "next_rip:", control->next_rip);
4811 4812 4813
	pr_err("%-20s%016llx\n", "avic_backing_page:", control->avic_backing_page);
	pr_err("%-20s%016llx\n", "avic_logical_id:", control->avic_logical_id);
	pr_err("%-20s%016llx\n", "avic_physical_id:", control->avic_physical_id);
4814
	pr_err("VMCB State Save Area:\n");
4815 4816 4817 4818 4819 4820 4821 4822 4823 4824 4825 4826 4827 4828 4829 4830 4831 4832 4833 4834 4835 4836 4837 4838 4839 4840 4841 4842 4843 4844 4845 4846 4847 4848 4849 4850 4851 4852 4853 4854
	pr_err("%-5s s: %04x a: %04x l: %08x b: %016llx\n",
	       "es:",
	       save->es.selector, save->es.attrib,
	       save->es.limit, save->es.base);
	pr_err("%-5s s: %04x a: %04x l: %08x b: %016llx\n",
	       "cs:",
	       save->cs.selector, save->cs.attrib,
	       save->cs.limit, save->cs.base);
	pr_err("%-5s s: %04x a: %04x l: %08x b: %016llx\n",
	       "ss:",
	       save->ss.selector, save->ss.attrib,
	       save->ss.limit, save->ss.base);
	pr_err("%-5s s: %04x a: %04x l: %08x b: %016llx\n",
	       "ds:",
	       save->ds.selector, save->ds.attrib,
	       save->ds.limit, save->ds.base);
	pr_err("%-5s s: %04x a: %04x l: %08x b: %016llx\n",
	       "fs:",
	       save->fs.selector, save->fs.attrib,
	       save->fs.limit, save->fs.base);
	pr_err("%-5s s: %04x a: %04x l: %08x b: %016llx\n",
	       "gs:",
	       save->gs.selector, save->gs.attrib,
	       save->gs.limit, save->gs.base);
	pr_err("%-5s s: %04x a: %04x l: %08x b: %016llx\n",
	       "gdtr:",
	       save->gdtr.selector, save->gdtr.attrib,
	       save->gdtr.limit, save->gdtr.base);
	pr_err("%-5s s: %04x a: %04x l: %08x b: %016llx\n",
	       "ldtr:",
	       save->ldtr.selector, save->ldtr.attrib,
	       save->ldtr.limit, save->ldtr.base);
	pr_err("%-5s s: %04x a: %04x l: %08x b: %016llx\n",
	       "idtr:",
	       save->idtr.selector, save->idtr.attrib,
	       save->idtr.limit, save->idtr.base);
	pr_err("%-5s s: %04x a: %04x l: %08x b: %016llx\n",
	       "tr:",
	       save->tr.selector, save->tr.attrib,
	       save->tr.limit, save->tr.base);
4855 4856
	pr_err("cpl:            %d                efer:         %016llx\n",
		save->cpl, save->efer);
4857 4858 4859 4860 4861 4862 4863 4864 4865 4866 4867 4868 4869 4870 4871 4872 4873 4874 4875 4876 4877 4878 4879 4880 4881 4882 4883
	pr_err("%-15s %016llx %-13s %016llx\n",
	       "cr0:", save->cr0, "cr2:", save->cr2);
	pr_err("%-15s %016llx %-13s %016llx\n",
	       "cr3:", save->cr3, "cr4:", save->cr4);
	pr_err("%-15s %016llx %-13s %016llx\n",
	       "dr6:", save->dr6, "dr7:", save->dr7);
	pr_err("%-15s %016llx %-13s %016llx\n",
	       "rip:", save->rip, "rflags:", save->rflags);
	pr_err("%-15s %016llx %-13s %016llx\n",
	       "rsp:", save->rsp, "rax:", save->rax);
	pr_err("%-15s %016llx %-13s %016llx\n",
	       "star:", save->star, "lstar:", save->lstar);
	pr_err("%-15s %016llx %-13s %016llx\n",
	       "cstar:", save->cstar, "sfmask:", save->sfmask);
	pr_err("%-15s %016llx %-13s %016llx\n",
	       "kernel_gs_base:", save->kernel_gs_base,
	       "sysenter_cs:", save->sysenter_cs);
	pr_err("%-15s %016llx %-13s %016llx\n",
	       "sysenter_esp:", save->sysenter_esp,
	       "sysenter_eip:", save->sysenter_eip);
	pr_err("%-15s %016llx %-13s %016llx\n",
	       "gpat:", save->g_pat, "dbgctl:", save->dbgctl);
	pr_err("%-15s %016llx %-13s %016llx\n",
	       "br_from:", save->br_from, "br_to:", save->br_to);
	pr_err("%-15s %016llx %-13s %016llx\n",
	       "excp_from:", save->last_excp_from,
	       "excp_to:", save->last_excp_to);
4884 4885
}

4886 4887 4888 4889 4890 4891 4892 4893
static void svm_get_exit_info(struct kvm_vcpu *vcpu, u64 *info1, u64 *info2)
{
	struct vmcb_control_area *control = &to_svm(vcpu)->vmcb->control;

	*info1 = control->exit_info_1;
	*info2 = control->exit_info_2;
}

A
Avi Kivity 已提交
4894
static int handle_exit(struct kvm_vcpu *vcpu)
A
Avi Kivity 已提交
4895
{
4896
	struct vcpu_svm *svm = to_svm(vcpu);
A
Avi Kivity 已提交
4897
	struct kvm_run *kvm_run = vcpu->run;
4898
	u32 exit_code = svm->vmcb->control.exit_code;
A
Avi Kivity 已提交
4899

4900 4901
	trace_kvm_exit(exit_code, vcpu, KVM_ISA_SVM);

4902
	if (!is_cr_intercept(svm, INTERCEPT_CR0_WRITE))
4903 4904 4905
		vcpu->arch.cr0 = svm->vmcb->save.cr0;
	if (npt_enabled)
		vcpu->arch.cr3 = svm->vmcb->save.cr3;
4906

4907 4908 4909 4910 4911 4912 4913
	if (unlikely(svm->nested.exit_required)) {
		nested_svm_vmexit(svm);
		svm->nested.exit_required = false;

		return 1;
	}

4914
	if (is_guest_mode(vcpu)) {
4915 4916
		int vmexit;

4917 4918 4919 4920
		trace_kvm_nested_vmexit(svm->vmcb->save.rip, exit_code,
					svm->vmcb->control.exit_info_1,
					svm->vmcb->control.exit_info_2,
					svm->vmcb->control.exit_int_info,
4921 4922
					svm->vmcb->control.exit_int_info_err,
					KVM_ISA_SVM);
4923

4924 4925 4926 4927 4928 4929
		vmexit = nested_svm_exit_special(svm);

		if (vmexit == NESTED_EXIT_CONTINUE)
			vmexit = nested_svm_exit_handled(svm);

		if (vmexit == NESTED_EXIT_DONE)
4930 4931 4932
			return 1;
	}

4933 4934
	svm_complete_interrupts(svm);

4935 4936 4937 4938
	if (svm->vmcb->control.exit_code == SVM_EXIT_ERR) {
		kvm_run->exit_reason = KVM_EXIT_FAIL_ENTRY;
		kvm_run->fail_entry.hardware_entry_failure_reason
			= svm->vmcb->control.exit_code;
4939 4940
		pr_err("KVM: FAILED VMRUN WITH VMCB:\n");
		dump_vmcb(vcpu);
4941 4942 4943
		return 0;
	}

4944
	if (is_external_interrupt(svm->vmcb->control.exit_int_info) &&
4945
	    exit_code != SVM_EXIT_EXCP_BASE + PF_VECTOR &&
4946 4947
	    exit_code != SVM_EXIT_NPF && exit_code != SVM_EXIT_TASK_SWITCH &&
	    exit_code != SVM_EXIT_INTR && exit_code != SVM_EXIT_NMI)
4948
		printk(KERN_ERR "%s: unexpected exit_int_info 0x%x "
A
Avi Kivity 已提交
4949
		       "exit_code 0x%x\n",
4950
		       __func__, svm->vmcb->control.exit_int_info,
A
Avi Kivity 已提交
4951 4952
		       exit_code);

4953
	if (exit_code >= ARRAY_SIZE(svm_exit_handlers)
J
Joe Perches 已提交
4954
	    || !svm_exit_handlers[exit_code]) {
4955
		WARN_ONCE(1, "svm: unexpected exit reason 0x%x\n", exit_code);
4956 4957
		kvm_queue_exception(vcpu, UD_VECTOR);
		return 1;
A
Avi Kivity 已提交
4958 4959
	}

A
Avi Kivity 已提交
4960
	return svm_exit_handlers[exit_code](svm);
A
Avi Kivity 已提交
4961 4962 4963 4964 4965 4966
}

static void reload_tss(struct kvm_vcpu *vcpu)
{
	int cpu = raw_smp_processor_id();

4967 4968
	struct svm_cpu_data *sd = per_cpu(svm_data, cpu);
	sd->tss_desc->type = 9; /* available 32/64-bit TSS */
A
Avi Kivity 已提交
4969 4970 4971
	load_TR_desc();
}

4972 4973 4974 4975 4976 4977 4978 4979 4980 4981 4982 4983 4984 4985 4986 4987 4988 4989 4990 4991 4992 4993 4994 4995
static void pre_sev_run(struct vcpu_svm *svm, int cpu)
{
	struct svm_cpu_data *sd = per_cpu(svm_data, cpu);
	int asid = sev_get_asid(svm->vcpu.kvm);

	/* Assign the asid allocated with this SEV guest */
	svm->vmcb->control.asid = asid;

	/*
	 * Flush guest TLB:
	 *
	 * 1) when different VMCB for the same ASID is to be run on the same host CPU.
	 * 2) or this VMCB was executed on different host CPU in previous VMRUNs.
	 */
	if (sd->sev_vmcbs[asid] == svm->vmcb &&
	    svm->last_cpu == cpu)
		return;

	svm->last_cpu = cpu;
	sd->sev_vmcbs[asid] = svm->vmcb;
	svm->vmcb->control.tlb_ctl = TLB_CONTROL_FLUSH_ASID;
	mark_dirty(svm->vmcb, VMCB_ASID);
}

R
Rusty Russell 已提交
4996
static void pre_svm_run(struct vcpu_svm *svm)
A
Avi Kivity 已提交
4997 4998 4999
{
	int cpu = raw_smp_processor_id();

5000
	struct svm_cpu_data *sd = per_cpu(svm_data, cpu);
A
Avi Kivity 已提交
5001

5002 5003 5004
	if (sev_guest(svm->vcpu.kvm))
		return pre_sev_run(svm, cpu);

5005
	/* FIXME: handle wraparound of asid_generation */
5006 5007
	if (svm->asid_generation != sd->asid_generation)
		new_asid(svm, sd);
A
Avi Kivity 已提交
5008 5009
}

5010 5011 5012 5013 5014 5015
static void svm_inject_nmi(struct kvm_vcpu *vcpu)
{
	struct vcpu_svm *svm = to_svm(vcpu);

	svm->vmcb->control.event_inj = SVM_EVTINJ_VALID | SVM_EVTINJ_TYPE_NMI;
	vcpu->arch.hflags |= HF_NMI_MASK;
5016
	set_intercept(svm, INTERCEPT_IRET);
5017 5018
	++vcpu->stat.nmi_injections;
}
A
Avi Kivity 已提交
5019

5020
static inline void svm_inject_irq(struct vcpu_svm *svm, int irq)
A
Avi Kivity 已提交
5021 5022 5023
{
	struct vmcb_control_area *control;

5024
	/* The following fields are ignored when AVIC is enabled */
R
Rusty Russell 已提交
5025
	control = &svm->vmcb->control;
5026
	control->int_vector = irq;
A
Avi Kivity 已提交
5027 5028 5029
	control->int_ctl &= ~V_INTR_PRIO_MASK;
	control->int_ctl |= V_IRQ_MASK |
		((/*control->int_vector >> 4*/ 0xf) << V_INTR_PRIO_SHIFT);
5030
	mark_dirty(svm->vmcb, VMCB_INTR);
A
Avi Kivity 已提交
5031 5032
}

5033
static void svm_set_irq(struct kvm_vcpu *vcpu)
E
Eddie Dong 已提交
5034 5035 5036
{
	struct vcpu_svm *svm = to_svm(vcpu);

5037
	BUG_ON(!(gif_set(svm)));
5038

5039 5040 5041
	trace_kvm_inj_virq(vcpu->arch.interrupt.nr);
	++vcpu->stat.irq_injections;

5042 5043
	svm->vmcb->control.event_inj = vcpu->arch.interrupt.nr |
		SVM_EVTINJ_VALID | SVM_EVTINJ_TYPE_INTR;
E
Eddie Dong 已提交
5044 5045
}

5046 5047 5048 5049 5050
static inline bool svm_nested_virtualize_tpr(struct kvm_vcpu *vcpu)
{
	return is_guest_mode(vcpu) && (vcpu->arch.hflags & HF_VINTR_MASK);
}

5051
static void update_cr8_intercept(struct kvm_vcpu *vcpu, int tpr, int irr)
5052 5053 5054
{
	struct vcpu_svm *svm = to_svm(vcpu);

5055 5056
	if (svm_nested_virtualize_tpr(vcpu) ||
	    kvm_vcpu_apicv_active(vcpu))
5057 5058
		return;

5059 5060
	clr_cr_intercept(svm, INTERCEPT_CR8_WRITE);

5061
	if (irr == -1)
5062 5063
		return;

5064
	if (tpr >= irr)
5065
		set_cr_intercept(svm, INTERCEPT_CR8_WRITE);
5066
}
5067

5068
static void svm_set_virtual_apic_mode(struct kvm_vcpu *vcpu)
5069 5070 5071 5072
{
	return;
}

5073
static bool svm_get_enable_apicv(struct kvm_vcpu *vcpu)
5074
{
5075
	return avic && irqchip_split(vcpu->kvm);
5076 5077 5078 5079
}

static void svm_hwapic_irr_update(struct kvm_vcpu *vcpu, int max_irr)
{
5080 5081
}

5082
static void svm_hwapic_isr_update(struct kvm_vcpu *vcpu, int max_isr)
5083
{
5084 5085
}

5086
/* Note: Currently only used by Hyper-V. */
5087
static void svm_refresh_apicv_exec_ctrl(struct kvm_vcpu *vcpu)
5088
{
5089 5090 5091
	struct vcpu_svm *svm = to_svm(vcpu);
	struct vmcb *vmcb = svm->vmcb;

5092
	if (!kvm_vcpu_apicv_active(&svm->vcpu))
5093 5094 5095 5096
		return;

	vmcb->control.int_ctl &= ~AVIC_ENABLE_MASK;
	mark_dirty(vmcb, VMCB_INTR);
5097 5098
}

5099
static void svm_load_eoi_exitmap(struct kvm_vcpu *vcpu, u64 *eoi_exit_bitmap)
5100 5101 5102 5103
{
	return;
}

5104 5105 5106 5107 5108 5109 5110
static void svm_deliver_avic_intr(struct kvm_vcpu *vcpu, int vec)
{
	kvm_lapic_set_irr(vec, vcpu->arch.apic);
	smp_mb__after_atomic();

	if (avic_vcpu_is_running(vcpu))
		wrmsrl(SVM_AVIC_DOORBELL,
5111
		       kvm_cpu_get_apicid(vcpu->cpu));
5112 5113 5114 5115
	else
		kvm_vcpu_wake_up(vcpu);
}

5116 5117 5118 5119 5120 5121 5122 5123 5124 5125 5126 5127 5128 5129 5130 5131 5132 5133 5134 5135 5136 5137 5138 5139 5140 5141 5142 5143 5144 5145 5146 5147 5148 5149 5150 5151 5152 5153 5154 5155 5156 5157 5158 5159 5160 5161 5162 5163 5164 5165 5166 5167 5168 5169 5170 5171 5172 5173 5174 5175 5176 5177 5178 5179 5180 5181 5182 5183 5184 5185 5186 5187 5188 5189 5190 5191 5192 5193 5194 5195 5196 5197 5198 5199 5200 5201 5202 5203 5204
static void svm_ir_list_del(struct vcpu_svm *svm, struct amd_iommu_pi_data *pi)
{
	unsigned long flags;
	struct amd_svm_iommu_ir *cur;

	spin_lock_irqsave(&svm->ir_list_lock, flags);
	list_for_each_entry(cur, &svm->ir_list, node) {
		if (cur->data != pi->ir_data)
			continue;
		list_del(&cur->node);
		kfree(cur);
		break;
	}
	spin_unlock_irqrestore(&svm->ir_list_lock, flags);
}

static int svm_ir_list_add(struct vcpu_svm *svm, struct amd_iommu_pi_data *pi)
{
	int ret = 0;
	unsigned long flags;
	struct amd_svm_iommu_ir *ir;

	/**
	 * In some cases, the existing irte is updaed and re-set,
	 * so we need to check here if it's already been * added
	 * to the ir_list.
	 */
	if (pi->ir_data && (pi->prev_ga_tag != 0)) {
		struct kvm *kvm = svm->vcpu.kvm;
		u32 vcpu_id = AVIC_GATAG_TO_VCPUID(pi->prev_ga_tag);
		struct kvm_vcpu *prev_vcpu = kvm_get_vcpu_by_id(kvm, vcpu_id);
		struct vcpu_svm *prev_svm;

		if (!prev_vcpu) {
			ret = -EINVAL;
			goto out;
		}

		prev_svm = to_svm(prev_vcpu);
		svm_ir_list_del(prev_svm, pi);
	}

	/**
	 * Allocating new amd_iommu_pi_data, which will get
	 * add to the per-vcpu ir_list.
	 */
	ir = kzalloc(sizeof(struct amd_svm_iommu_ir), GFP_KERNEL);
	if (!ir) {
		ret = -ENOMEM;
		goto out;
	}
	ir->data = pi->ir_data;

	spin_lock_irqsave(&svm->ir_list_lock, flags);
	list_add(&ir->node, &svm->ir_list);
	spin_unlock_irqrestore(&svm->ir_list_lock, flags);
out:
	return ret;
}

/**
 * Note:
 * The HW cannot support posting multicast/broadcast
 * interrupts to a vCPU. So, we still use legacy interrupt
 * remapping for these kind of interrupts.
 *
 * For lowest-priority interrupts, we only support
 * those with single CPU as the destination, e.g. user
 * configures the interrupts via /proc/irq or uses
 * irqbalance to make the interrupts single-CPU.
 */
static int
get_pi_vcpu_info(struct kvm *kvm, struct kvm_kernel_irq_routing_entry *e,
		 struct vcpu_data *vcpu_info, struct vcpu_svm **svm)
{
	struct kvm_lapic_irq irq;
	struct kvm_vcpu *vcpu = NULL;

	kvm_set_msi_irq(kvm, e, &irq);

	if (!kvm_intr_is_single_vcpu(kvm, &irq, &vcpu)) {
		pr_debug("SVM: %s: use legacy intr remap mode for irq %u\n",
			 __func__, irq.vector);
		return -1;
	}

	pr_debug("SVM: %s: use GA mode for irq %u\n", __func__,
		 irq.vector);
	*svm = to_svm(vcpu);
5205
	vcpu_info->pi_desc_addr = __sme_set(page_to_phys((*svm)->avic_backing_page));
5206 5207 5208 5209 5210 5211 5212 5213 5214 5215 5216 5217 5218 5219 5220 5221 5222 5223 5224 5225 5226 5227 5228 5229 5230 5231 5232 5233 5234 5235 5236 5237 5238 5239 5240 5241 5242 5243 5244 5245 5246 5247 5248 5249 5250 5251 5252 5253 5254 5255
	vcpu_info->vector = irq.vector;

	return 0;
}

/*
 * svm_update_pi_irte - set IRTE for Posted-Interrupts
 *
 * @kvm: kvm
 * @host_irq: host irq of the interrupt
 * @guest_irq: gsi of the interrupt
 * @set: set or unset PI
 * returns 0 on success, < 0 on failure
 */
static int svm_update_pi_irte(struct kvm *kvm, unsigned int host_irq,
			      uint32_t guest_irq, bool set)
{
	struct kvm_kernel_irq_routing_entry *e;
	struct kvm_irq_routing_table *irq_rt;
	int idx, ret = -EINVAL;

	if (!kvm_arch_has_assigned_device(kvm) ||
	    !irq_remapping_cap(IRQ_POSTING_CAP))
		return 0;

	pr_debug("SVM: %s: host_irq=%#x, guest_irq=%#x, set=%#x\n",
		 __func__, host_irq, guest_irq, set);

	idx = srcu_read_lock(&kvm->irq_srcu);
	irq_rt = srcu_dereference(kvm->irq_routing, &kvm->irq_srcu);
	WARN_ON(guest_irq >= irq_rt->nr_rt_entries);

	hlist_for_each_entry(e, &irq_rt->map[guest_irq], link) {
		struct vcpu_data vcpu_info;
		struct vcpu_svm *svm = NULL;

		if (e->type != KVM_IRQ_ROUTING_MSI)
			continue;

		/**
		 * Here, we setup with legacy mode in the following cases:
		 * 1. When cannot target interrupt to a specific vcpu.
		 * 2. Unsetting posted interrupt.
		 * 3. APIC virtialization is disabled for the vcpu.
		 */
		if (!get_pi_vcpu_info(kvm, e, &vcpu_info, &svm) && set &&
		    kvm_vcpu_apicv_active(&svm->vcpu)) {
			struct amd_iommu_pi_data pi;

			/* Try to enable guest_mode in IRTE */
5256 5257
			pi.base = __sme_set(page_to_phys(svm->avic_backing_page) &
					    AVIC_HPA_MASK);
5258
			pi.ga_tag = AVIC_GATAG(to_kvm_svm(kvm)->avic_vm_id,
5259 5260 5261 5262 5263 5264 5265 5266 5267 5268 5269 5270 5271 5272 5273 5274 5275 5276 5277 5278 5279 5280 5281 5282 5283 5284 5285 5286 5287 5288 5289 5290 5291 5292 5293 5294 5295 5296 5297 5298 5299 5300 5301
						     svm->vcpu.vcpu_id);
			pi.is_guest_mode = true;
			pi.vcpu_data = &vcpu_info;
			ret = irq_set_vcpu_affinity(host_irq, &pi);

			/**
			 * Here, we successfully setting up vcpu affinity in
			 * IOMMU guest mode. Now, we need to store the posted
			 * interrupt information in a per-vcpu ir_list so that
			 * we can reference to them directly when we update vcpu
			 * scheduling information in IOMMU irte.
			 */
			if (!ret && pi.is_guest_mode)
				svm_ir_list_add(svm, &pi);
		} else {
			/* Use legacy mode in IRTE */
			struct amd_iommu_pi_data pi;

			/**
			 * Here, pi is used to:
			 * - Tell IOMMU to use legacy mode for this interrupt.
			 * - Retrieve ga_tag of prior interrupt remapping data.
			 */
			pi.is_guest_mode = false;
			ret = irq_set_vcpu_affinity(host_irq, &pi);

			/**
			 * Check if the posted interrupt was previously
			 * setup with the guest_mode by checking if the ga_tag
			 * was cached. If so, we need to clean up the per-vcpu
			 * ir_list.
			 */
			if (!ret && pi.prev_ga_tag) {
				int id = AVIC_GATAG_TO_VCPUID(pi.prev_ga_tag);
				struct kvm_vcpu *vcpu;

				vcpu = kvm_get_vcpu_by_id(kvm, id);
				if (vcpu)
					svm_ir_list_del(to_svm(vcpu), &pi);
			}
		}

		if (!ret && svm) {
5302 5303
			trace_kvm_pi_irte_update(host_irq, svm->vcpu.vcpu_id,
						 e->gsi, vcpu_info.vector,
5304 5305 5306 5307 5308 5309 5310 5311 5312 5313 5314 5315 5316 5317 5318
						 vcpu_info.pi_desc_addr, set);
		}

		if (ret < 0) {
			pr_err("%s: failed to update PI IRTE\n", __func__);
			goto out;
		}
	}

	ret = 0;
out:
	srcu_read_unlock(&kvm->irq_srcu, idx);
	return ret;
}

5319 5320 5321 5322
static int svm_nmi_allowed(struct kvm_vcpu *vcpu)
{
	struct vcpu_svm *svm = to_svm(vcpu);
	struct vmcb *vmcb = svm->vmcb;
J
Joerg Roedel 已提交
5323 5324 5325 5326 5327 5328
	int ret;
	ret = !(vmcb->control.int_state & SVM_INTERRUPT_SHADOW_MASK) &&
	      !(svm->vcpu.arch.hflags & HF_NMI_MASK);
	ret = ret && gif_set(svm) && nested_svm_nmi(svm);

	return ret;
5329 5330
}

J
Jan Kiszka 已提交
5331 5332 5333 5334 5335 5336 5337 5338 5339 5340 5341 5342 5343
static bool svm_get_nmi_mask(struct kvm_vcpu *vcpu)
{
	struct vcpu_svm *svm = to_svm(vcpu);

	return !!(svm->vcpu.arch.hflags & HF_NMI_MASK);
}

static void svm_set_nmi_mask(struct kvm_vcpu *vcpu, bool masked)
{
	struct vcpu_svm *svm = to_svm(vcpu);

	if (masked) {
		svm->vcpu.arch.hflags |= HF_NMI_MASK;
5344
		set_intercept(svm, INTERCEPT_IRET);
J
Jan Kiszka 已提交
5345 5346
	} else {
		svm->vcpu.arch.hflags &= ~HF_NMI_MASK;
5347
		clr_intercept(svm, INTERCEPT_IRET);
J
Jan Kiszka 已提交
5348 5349 5350
	}
}

5351 5352 5353 5354
static int svm_interrupt_allowed(struct kvm_vcpu *vcpu)
{
	struct vcpu_svm *svm = to_svm(vcpu);
	struct vmcb *vmcb = svm->vmcb;
5355 5356 5357 5358 5359 5360
	int ret;

	if (!gif_set(svm) ||
	     (vmcb->control.int_state & SVM_INTERRUPT_SHADOW_MASK))
		return 0;

5361
	ret = !!(kvm_get_rflags(vcpu) & X86_EFLAGS_IF);
5362

5363
	if (is_guest_mode(vcpu))
5364 5365 5366
		return ret && !(svm->vcpu.arch.hflags & HF_VINTR_MASK);

	return ret;
5367 5368
}

5369
static void enable_irq_window(struct kvm_vcpu *vcpu)
A
Avi Kivity 已提交
5370
{
5371 5372
	struct vcpu_svm *svm = to_svm(vcpu);

5373 5374 5375
	if (kvm_vcpu_apicv_active(vcpu))
		return;

J
Joerg Roedel 已提交
5376 5377 5378 5379
	/*
	 * In case GIF=0 we can't rely on the CPU to tell us when GIF becomes
	 * 1, because that's a separate STGI/VMRUN intercept.  The next time we
	 * get that intercept, this function will be called again though and
5380 5381 5382
	 * we'll get the vintr intercept. However, if the vGIF feature is
	 * enabled, the STGI interception will not occur. Enable the irq
	 * window under the assumption that the hardware will set the GIF.
J
Joerg Roedel 已提交
5383
	 */
5384
	if ((vgif_enabled(svm) || gif_set(svm)) && nested_svm_intr(svm)) {
5385 5386 5387
		svm_set_vintr(svm);
		svm_inject_irq(svm, 0x0);
	}
5388 5389
}

5390
static void enable_nmi_window(struct kvm_vcpu *vcpu)
5391
{
5392
	struct vcpu_svm *svm = to_svm(vcpu);
5393

5394 5395
	if ((svm->vcpu.arch.hflags & (HF_NMI_MASK | HF_IRET_MASK))
	    == HF_NMI_MASK)
5396
		return; /* IRET will cause a vm exit */
5397

5398 5399 5400
	if (!gif_set(svm)) {
		if (vgif_enabled(svm))
			set_intercept(svm, INTERCEPT_STGI);
5401
		return; /* STGI will cause a vm exit */
5402
	}
5403 5404 5405 5406

	if (svm->nested.exit_required)
		return; /* we're not going to run the guest yet */

J
Joerg Roedel 已提交
5407 5408 5409 5410
	/*
	 * Something prevents NMI from been injected. Single step over possible
	 * problem (IRET or exception injection or interrupt shadow)
	 */
5411
	svm->nmi_singlestep_guest_rflags = svm_get_rflags(vcpu);
J
Jan Kiszka 已提交
5412
	svm->nmi_singlestep = true;
5413
	svm->vmcb->save.rflags |= (X86_EFLAGS_TF | X86_EFLAGS_RF);
5414 5415
}

5416 5417 5418 5419 5420
static int svm_set_tss_addr(struct kvm *kvm, unsigned int addr)
{
	return 0;
}

5421 5422 5423 5424 5425
static int svm_set_identity_map_addr(struct kvm *kvm, u64 ident_addr)
{
	return 0;
}

5426
static void svm_flush_tlb(struct kvm_vcpu *vcpu, bool invalidate_gpa)
5427
{
5428 5429 5430 5431 5432 5433
	struct vcpu_svm *svm = to_svm(vcpu);

	if (static_cpu_has(X86_FEATURE_FLUSHBYASID))
		svm->vmcb->control.tlb_ctl = TLB_CONTROL_FLUSH_ASID;
	else
		svm->asid_generation--;
5434 5435
}

5436 5437 5438 5439 5440 5441 5442
static void svm_flush_tlb_gva(struct kvm_vcpu *vcpu, gva_t gva)
{
	struct vcpu_svm *svm = to_svm(vcpu);

	invlpga(gva, svm->vmcb->control.asid);
}

5443 5444 5445 5446
static void svm_prepare_guest_switch(struct kvm_vcpu *vcpu)
{
}

5447 5448 5449 5450
static inline void sync_cr8_to_lapic(struct kvm_vcpu *vcpu)
{
	struct vcpu_svm *svm = to_svm(vcpu);

5451
	if (svm_nested_virtualize_tpr(vcpu))
5452 5453
		return;

5454
	if (!is_cr_intercept(svm, INTERCEPT_CR8_WRITE)) {
5455
		int cr8 = svm->vmcb->control.int_ctl & V_TPR_MASK;
5456
		kvm_set_cr8(vcpu, cr8);
5457 5458 5459
	}
}

5460 5461 5462 5463 5464
static inline void sync_lapic_to_cr8(struct kvm_vcpu *vcpu)
{
	struct vcpu_svm *svm = to_svm(vcpu);
	u64 cr8;

5465 5466
	if (svm_nested_virtualize_tpr(vcpu) ||
	    kvm_vcpu_apicv_active(vcpu))
5467 5468
		return;

5469 5470 5471 5472 5473
	cr8 = kvm_get_cr8(vcpu);
	svm->vmcb->control.int_ctl &= ~V_TPR_MASK;
	svm->vmcb->control.int_ctl |= cr8 & V_TPR_MASK;
}

5474 5475 5476 5477 5478
static void svm_complete_interrupts(struct vcpu_svm *svm)
{
	u8 vector;
	int type;
	u32 exitintinfo = svm->vmcb->control.exit_int_info;
5479 5480 5481
	unsigned int3_injected = svm->int3_injected;

	svm->int3_injected = 0;
5482

5483 5484 5485 5486 5487 5488
	/*
	 * If we've made progress since setting HF_IRET_MASK, we've
	 * executed an IRET and can allow NMI injection.
	 */
	if ((svm->vcpu.arch.hflags & HF_IRET_MASK)
	    && kvm_rip_read(&svm->vcpu) != svm->nmi_iret_rip) {
5489
		svm->vcpu.arch.hflags &= ~(HF_NMI_MASK | HF_IRET_MASK);
5490 5491
		kvm_make_request(KVM_REQ_EVENT, &svm->vcpu);
	}
5492

5493 5494 5495 5496 5497 5498 5499
	svm->vcpu.arch.nmi_injected = false;
	kvm_clear_exception_queue(&svm->vcpu);
	kvm_clear_interrupt_queue(&svm->vcpu);

	if (!(exitintinfo & SVM_EXITINTINFO_VALID))
		return;

5500 5501
	kvm_make_request(KVM_REQ_EVENT, &svm->vcpu);

5502 5503 5504 5505 5506 5507 5508 5509
	vector = exitintinfo & SVM_EXITINTINFO_VEC_MASK;
	type = exitintinfo & SVM_EXITINTINFO_TYPE_MASK;

	switch (type) {
	case SVM_EXITINTINFO_TYPE_NMI:
		svm->vcpu.arch.nmi_injected = true;
		break;
	case SVM_EXITINTINFO_TYPE_EXEPT:
5510 5511 5512 5513 5514 5515 5516 5517 5518 5519 5520
		/*
		 * In case of software exceptions, do not reinject the vector,
		 * but re-execute the instruction instead. Rewind RIP first
		 * if we emulated INT3 before.
		 */
		if (kvm_exception_is_soft(vector)) {
			if (vector == BP_VECTOR && int3_injected &&
			    kvm_is_linear_rip(&svm->vcpu, svm->int3_rip))
				kvm_rip_write(&svm->vcpu,
					      kvm_rip_read(&svm->vcpu) -
					      int3_injected);
5521
			break;
5522
		}
5523 5524
		if (exitintinfo & SVM_EXITINTINFO_VALID_ERR) {
			u32 err = svm->vmcb->control.exit_int_info_err;
5525
			kvm_requeue_exception_e(&svm->vcpu, vector, err);
5526 5527

		} else
5528
			kvm_requeue_exception(&svm->vcpu, vector);
5529 5530
		break;
	case SVM_EXITINTINFO_TYPE_INTR:
5531
		kvm_queue_interrupt(&svm->vcpu, vector, false);
5532 5533 5534 5535 5536 5537
		break;
	default:
		break;
	}
}

A
Avi Kivity 已提交
5538 5539 5540 5541 5542 5543 5544 5545 5546 5547 5548
static void svm_cancel_injection(struct kvm_vcpu *vcpu)
{
	struct vcpu_svm *svm = to_svm(vcpu);
	struct vmcb_control_area *control = &svm->vmcb->control;

	control->exit_int_info = control->event_inj;
	control->exit_int_info_err = control->event_inj_err;
	control->event_inj = 0;
	svm_complete_interrupts(svm);
}

A
Avi Kivity 已提交
5549
static void svm_vcpu_run(struct kvm_vcpu *vcpu)
A
Avi Kivity 已提交
5550
{
5551
	struct vcpu_svm *svm = to_svm(vcpu);
5552

5553 5554 5555 5556
	svm->vmcb->save.rax = vcpu->arch.regs[VCPU_REGS_RAX];
	svm->vmcb->save.rsp = vcpu->arch.regs[VCPU_REGS_RSP];
	svm->vmcb->save.rip = vcpu->arch.regs[VCPU_REGS_RIP];

5557 5558 5559 5560 5561 5562 5563
	/*
	 * A vmexit emulation is required before the vcpu can be executed
	 * again.
	 */
	if (unlikely(svm->nested.exit_required))
		return;

5564 5565 5566 5567 5568 5569 5570 5571 5572 5573 5574 5575 5576 5577 5578 5579
	/*
	 * Disable singlestep if we're injecting an interrupt/exception.
	 * We don't want our modified rflags to be pushed on the stack where
	 * we might not be able to easily reset them if we disabled NMI
	 * singlestep later.
	 */
	if (svm->nmi_singlestep && svm->vmcb->control.event_inj) {
		/*
		 * Event injection happens before external interrupts cause a
		 * vmexit and interrupts are disabled here, so smp_send_reschedule
		 * is enough to force an immediate vmexit.
		 */
		disable_nmi_singlestep(svm);
		smp_send_reschedule(vcpu->cpu);
	}

R
Rusty Russell 已提交
5580
	pre_svm_run(svm);
A
Avi Kivity 已提交
5581

5582 5583
	sync_lapic_to_cr8(vcpu);

5584
	svm->vmcb->save.cr2 = vcpu->arch.cr2;
A
Avi Kivity 已提交
5585

5586 5587
	clgi();

5588 5589 5590 5591 5592 5593
	/*
	 * If this vCPU has touched SPEC_CTRL, restore the guest's value if
	 * it's non-zero. Since vmentry is serialising on affected CPUs, there
	 * is no need to worry about the conditional branch over the wrmsr
	 * being speculatively taken.
	 */
5594
	x86_spec_ctrl_set_guest(svm->spec_ctrl, svm->virt_spec_ctrl);
5595

5596 5597
	local_irq_enable();

A
Avi Kivity 已提交
5598
	asm volatile (
A
Avi Kivity 已提交
5599 5600 5601 5602 5603 5604 5605
		"push %%" _ASM_BP "; \n\t"
		"mov %c[rbx](%[svm]), %%" _ASM_BX " \n\t"
		"mov %c[rcx](%[svm]), %%" _ASM_CX " \n\t"
		"mov %c[rdx](%[svm]), %%" _ASM_DX " \n\t"
		"mov %c[rsi](%[svm]), %%" _ASM_SI " \n\t"
		"mov %c[rdi](%[svm]), %%" _ASM_DI " \n\t"
		"mov %c[rbp](%[svm]), %%" _ASM_BP " \n\t"
5606
#ifdef CONFIG_X86_64
R
Rusty Russell 已提交
5607 5608 5609 5610 5611 5612 5613 5614
		"mov %c[r8](%[svm]),  %%r8  \n\t"
		"mov %c[r9](%[svm]),  %%r9  \n\t"
		"mov %c[r10](%[svm]), %%r10 \n\t"
		"mov %c[r11](%[svm]), %%r11 \n\t"
		"mov %c[r12](%[svm]), %%r12 \n\t"
		"mov %c[r13](%[svm]), %%r13 \n\t"
		"mov %c[r14](%[svm]), %%r14 \n\t"
		"mov %c[r15](%[svm]), %%r15 \n\t"
A
Avi Kivity 已提交
5615 5616 5617
#endif

		/* Enter guest mode */
A
Avi Kivity 已提交
5618 5619
		"push %%" _ASM_AX " \n\t"
		"mov %c[vmcb](%[svm]), %%" _ASM_AX " \n\t"
5620 5621 5622
		__ex(SVM_VMLOAD) "\n\t"
		__ex(SVM_VMRUN) "\n\t"
		__ex(SVM_VMSAVE) "\n\t"
A
Avi Kivity 已提交
5623
		"pop %%" _ASM_AX " \n\t"
A
Avi Kivity 已提交
5624 5625

		/* Save guest registers, load host registers */
A
Avi Kivity 已提交
5626 5627 5628 5629 5630 5631
		"mov %%" _ASM_BX ", %c[rbx](%[svm]) \n\t"
		"mov %%" _ASM_CX ", %c[rcx](%[svm]) \n\t"
		"mov %%" _ASM_DX ", %c[rdx](%[svm]) \n\t"
		"mov %%" _ASM_SI ", %c[rsi](%[svm]) \n\t"
		"mov %%" _ASM_DI ", %c[rdi](%[svm]) \n\t"
		"mov %%" _ASM_BP ", %c[rbp](%[svm]) \n\t"
5632
#ifdef CONFIG_X86_64
R
Rusty Russell 已提交
5633 5634 5635 5636 5637 5638 5639 5640
		"mov %%r8,  %c[r8](%[svm]) \n\t"
		"mov %%r9,  %c[r9](%[svm]) \n\t"
		"mov %%r10, %c[r10](%[svm]) \n\t"
		"mov %%r11, %c[r11](%[svm]) \n\t"
		"mov %%r12, %c[r12](%[svm]) \n\t"
		"mov %%r13, %c[r13](%[svm]) \n\t"
		"mov %%r14, %c[r14](%[svm]) \n\t"
		"mov %%r15, %c[r15](%[svm]) \n\t"
5641 5642 5643 5644 5645 5646 5647 5648 5649 5650 5651 5652 5653 5654 5655 5656 5657 5658 5659
#endif
		/*
		* Clear host registers marked as clobbered to prevent
		* speculative use.
		*/
		"xor %%" _ASM_BX ", %%" _ASM_BX " \n\t"
		"xor %%" _ASM_CX ", %%" _ASM_CX " \n\t"
		"xor %%" _ASM_DX ", %%" _ASM_DX " \n\t"
		"xor %%" _ASM_SI ", %%" _ASM_SI " \n\t"
		"xor %%" _ASM_DI ", %%" _ASM_DI " \n\t"
#ifdef CONFIG_X86_64
		"xor %%r8, %%r8 \n\t"
		"xor %%r9, %%r9 \n\t"
		"xor %%r10, %%r10 \n\t"
		"xor %%r11, %%r11 \n\t"
		"xor %%r12, %%r12 \n\t"
		"xor %%r13, %%r13 \n\t"
		"xor %%r14, %%r14 \n\t"
		"xor %%r15, %%r15 \n\t"
A
Avi Kivity 已提交
5660
#endif
A
Avi Kivity 已提交
5661
		"pop %%" _ASM_BP
A
Avi Kivity 已提交
5662
		:
R
Rusty Russell 已提交
5663
		: [svm]"a"(svm),
A
Avi Kivity 已提交
5664
		  [vmcb]"i"(offsetof(struct vcpu_svm, vmcb_pa)),
5665 5666 5667 5668 5669 5670
		  [rbx]"i"(offsetof(struct vcpu_svm, vcpu.arch.regs[VCPU_REGS_RBX])),
		  [rcx]"i"(offsetof(struct vcpu_svm, vcpu.arch.regs[VCPU_REGS_RCX])),
		  [rdx]"i"(offsetof(struct vcpu_svm, vcpu.arch.regs[VCPU_REGS_RDX])),
		  [rsi]"i"(offsetof(struct vcpu_svm, vcpu.arch.regs[VCPU_REGS_RSI])),
		  [rdi]"i"(offsetof(struct vcpu_svm, vcpu.arch.regs[VCPU_REGS_RDI])),
		  [rbp]"i"(offsetof(struct vcpu_svm, vcpu.arch.regs[VCPU_REGS_RBP]))
5671
#ifdef CONFIG_X86_64
5672 5673 5674 5675 5676 5677 5678 5679
		  , [r8]"i"(offsetof(struct vcpu_svm, vcpu.arch.regs[VCPU_REGS_R8])),
		  [r9]"i"(offsetof(struct vcpu_svm, vcpu.arch.regs[VCPU_REGS_R9])),
		  [r10]"i"(offsetof(struct vcpu_svm, vcpu.arch.regs[VCPU_REGS_R10])),
		  [r11]"i"(offsetof(struct vcpu_svm, vcpu.arch.regs[VCPU_REGS_R11])),
		  [r12]"i"(offsetof(struct vcpu_svm, vcpu.arch.regs[VCPU_REGS_R12])),
		  [r13]"i"(offsetof(struct vcpu_svm, vcpu.arch.regs[VCPU_REGS_R13])),
		  [r14]"i"(offsetof(struct vcpu_svm, vcpu.arch.regs[VCPU_REGS_R14])),
		  [r15]"i"(offsetof(struct vcpu_svm, vcpu.arch.regs[VCPU_REGS_R15]))
A
Avi Kivity 已提交
5680
#endif
5681 5682
		: "cc", "memory"
#ifdef CONFIG_X86_64
A
Avi Kivity 已提交
5683
		, "rbx", "rcx", "rdx", "rsi", "rdi"
5684
		, "r8", "r9", "r10", "r11" , "r12", "r13", "r14", "r15"
A
Avi Kivity 已提交
5685 5686
#else
		, "ebx", "ecx", "edx", "esi", "edi"
5687 5688
#endif
		);
A
Avi Kivity 已提交
5689

5690 5691 5692 5693 5694 5695 5696 5697 5698 5699 5700 5701
	/* Eliminate branch target predictions from guest mode */
	vmexit_fill_RSB();

#ifdef CONFIG_X86_64
	wrmsrl(MSR_GS_BASE, svm->host.gs_base);
#else
	loadsegment(fs, svm->host.fs);
#ifndef CONFIG_X86_32_LAZY_GS
	loadsegment(gs, svm->host.gs);
#endif
#endif

5702 5703 5704 5705 5706 5707 5708 5709 5710 5711 5712 5713 5714 5715 5716
	/*
	 * We do not use IBRS in the kernel. If this vCPU has used the
	 * SPEC_CTRL MSR it may have left it on; save the value and
	 * turn it off. This is much more efficient than blindly adding
	 * it to the atomic save/restore list. Especially as the former
	 * (Saving guest MSRs on vmexit) doesn't even exist in KVM.
	 *
	 * For non-nested case:
	 * If the L01 MSR bitmap does not intercept the MSR, then we need to
	 * save it.
	 *
	 * For nested case:
	 * If the L02 MSR bitmap does not intercept the MSR, then we need to
	 * save it.
	 */
5717
	if (unlikely(!msr_write_intercepted(vcpu, MSR_IA32_SPEC_CTRL)))
5718
		svm->spec_ctrl = native_read_msr(MSR_IA32_SPEC_CTRL);
5719

A
Avi Kivity 已提交
5720 5721
	reload_tss(vcpu);

5722 5723
	local_irq_disable();

5724 5725
	x86_spec_ctrl_restore_host(svm->spec_ctrl, svm->virt_spec_ctrl);

5726 5727 5728 5729 5730
	vcpu->arch.cr2 = svm->vmcb->save.cr2;
	vcpu->arch.regs[VCPU_REGS_RAX] = svm->vmcb->save.rax;
	vcpu->arch.regs[VCPU_REGS_RSP] = svm->vmcb->save.rsp;
	vcpu->arch.regs[VCPU_REGS_RIP] = svm->vmcb->save.rip;

5731
	if (unlikely(svm->vmcb->control.exit_code == SVM_EXIT_NMI))
5732
		kvm_before_interrupt(&svm->vcpu);
5733 5734 5735 5736 5737 5738

	stgi();

	/* Any pending NMI will happen here */

	if (unlikely(svm->vmcb->control.exit_code == SVM_EXIT_NMI))
5739
		kvm_after_interrupt(&svm->vcpu);
5740

5741 5742
	sync_cr8_to_lapic(vcpu);

5743
	svm->next_rip = 0;
5744

5745 5746
	svm->vmcb->control.tlb_ctl = TLB_CONTROL_DO_NOTHING;

G
Gleb Natapov 已提交
5747 5748
	/* if exit due to PF check for async PF */
	if (svm->vmcb->control.exit_code == SVM_EXIT_EXCP_BASE + PF_VECTOR)
5749
		svm->vcpu.arch.apf.host_apf_reason = kvm_read_and_reset_pf_reason();
G
Gleb Natapov 已提交
5750

A
Avi Kivity 已提交
5751 5752 5753 5754
	if (npt_enabled) {
		vcpu->arch.regs_avail &= ~(1 << VCPU_EXREG_PDPTR);
		vcpu->arch.regs_dirty &= ~(1 << VCPU_EXREG_PDPTR);
	}
5755 5756 5757 5758 5759 5760 5761 5762

	/*
	 * We need to handle MC intercepts here before the vcpu has a chance to
	 * change the physical cpu
	 */
	if (unlikely(svm->vmcb->control.exit_code ==
		     SVM_EXIT_EXCP_BASE + MC_VECTOR))
		svm_handle_mce(svm);
5763 5764

	mark_all_clean(svm->vmcb);
A
Avi Kivity 已提交
5765
}
5766
STACK_FRAME_NON_STANDARD(svm_vcpu_run);
A
Avi Kivity 已提交
5767 5768 5769

static void svm_set_cr3(struct kvm_vcpu *vcpu, unsigned long root)
{
5770 5771
	struct vcpu_svm *svm = to_svm(vcpu);

5772
	svm->vmcb->save.cr3 = __sme_set(root);
5773
	mark_dirty(svm->vmcb, VMCB_CR);
A
Avi Kivity 已提交
5774 5775
}

5776 5777 5778 5779
static void set_tdp_cr3(struct kvm_vcpu *vcpu, unsigned long root)
{
	struct vcpu_svm *svm = to_svm(vcpu);

5780
	svm->vmcb->control.nested_cr3 = __sme_set(root);
5781
	mark_dirty(svm->vmcb, VMCB_NPT);
5782 5783

	/* Also sync guest cr3 here in case we live migrate */
5784
	svm->vmcb->save.cr3 = kvm_read_cr3(vcpu);
5785
	mark_dirty(svm->vmcb, VMCB_CR);
5786 5787
}

A
Avi Kivity 已提交
5788 5789
static int is_disabled(void)
{
5790 5791 5792 5793 5794 5795
	u64 vm_cr;

	rdmsrl(MSR_VM_CR, vm_cr);
	if (vm_cr & (1 << SVM_VM_CR_SVM_DISABLE))
		return 1;

A
Avi Kivity 已提交
5796 5797 5798
	return 0;
}

I
Ingo Molnar 已提交
5799 5800 5801 5802 5803 5804 5805 5806 5807 5808 5809
static void
svm_patch_hypercall(struct kvm_vcpu *vcpu, unsigned char *hypercall)
{
	/*
	 * Patch in the VMMCALL instruction:
	 */
	hypercall[0] = 0x0f;
	hypercall[1] = 0x01;
	hypercall[2] = 0xd9;
}

Y
Yang, Sheng 已提交
5810 5811 5812 5813 5814
static void svm_check_processor_compat(void *rtn)
{
	*(int *)rtn = 0;
}

5815 5816 5817 5818 5819
static bool svm_cpu_has_accelerated_tpr(void)
{
	return false;
}

5820
static bool svm_has_emulated_msr(int index)
5821 5822 5823 5824
{
	return true;
}

5825 5826 5827 5828 5829
static u64 svm_get_mt_mask(struct kvm_vcpu *vcpu, gfn_t gfn, bool is_mmio)
{
	return 0;
}

5830 5831
static void svm_cpuid_update(struct kvm_vcpu *vcpu)
{
5832 5833 5834
	struct vcpu_svm *svm = to_svm(vcpu);

	/* Update nrips enabled cache */
5835
	svm->nrips_enabled = !!guest_cpuid_has(&svm->vcpu, X86_FEATURE_NRIPS);
5836 5837 5838 5839

	if (!kvm_vcpu_apicv_active(vcpu))
		return;

5840
	guest_cpuid_clear(vcpu, X86_FEATURE_X2APIC);
5841 5842
}

5843 5844
static void svm_set_supported_cpuid(u32 func, struct kvm_cpuid_entry2 *entry)
{
5845
	switch (func) {
5846 5847 5848 5849
	case 0x1:
		if (avic)
			entry->ecx &= ~bit(X86_FEATURE_X2APIC);
		break;
5850 5851 5852 5853
	case 0x80000001:
		if (nested)
			entry->ecx |= (1 << 2); /* Set SVM bit */
		break;
5854 5855 5856 5857 5858
	case 0x8000000A:
		entry->eax = 1; /* SVM revision 1 */
		entry->ebx = 8; /* Lets support 8 ASIDs in case we add proper
				   ASID emulation to nested SVM */
		entry->ecx = 0; /* Reserved */
5859 5860 5861 5862
		entry->edx = 0; /* Per default do not support any
				   additional features */

		/* Support next_rip if host supports it */
5863
		if (boot_cpu_has(X86_FEATURE_NRIPS))
5864
			entry->edx |= SVM_FEATURE_NRIP;
5865

5866 5867 5868 5869
		/* Support NPT for the guest if enabled */
		if (npt_enabled)
			entry->edx |= SVM_FEATURE_NPT;

5870
		break;
5871 5872 5873 5874 5875 5876
	case 0x8000001F:
		/* Support memory encryption cpuid if host supports it */
		if (boot_cpu_has(X86_FEATURE_SEV))
			cpuid(0x8000001f, &entry->eax, &entry->ebx,
				&entry->ecx, &entry->edx);

5877
	}
5878 5879
}

5880
static int svm_get_lpage_level(void)
5881
{
5882
	return PT_PDPE_LEVEL;
5883 5884
}

5885 5886
static bool svm_rdtscp_supported(void)
{
P
Paolo Bonzini 已提交
5887
	return boot_cpu_has(X86_FEATURE_RDTSCP);
5888 5889
}

5890 5891 5892 5893 5894
static bool svm_invpcid_supported(void)
{
	return false;
}

5895 5896 5897 5898 5899
static bool svm_mpx_supported(void)
{
	return false;
}

5900 5901 5902 5903 5904
static bool svm_xsaves_supported(void)
{
	return false;
}

5905 5906 5907 5908 5909
static bool svm_umip_emulated(void)
{
	return false;
}

5910 5911 5912 5913 5914
static bool svm_has_wbinvd_exit(void)
{
	return true;
}

5915
#define PRE_EX(exit)  { .exit_code = (exit), \
5916
			.stage = X86_ICPT_PRE_EXCEPT, }
5917
#define POST_EX(exit) { .exit_code = (exit), \
5918
			.stage = X86_ICPT_POST_EXCEPT, }
5919
#define POST_MEM(exit) { .exit_code = (exit), \
5920
			.stage = X86_ICPT_POST_MEMACCESS, }
5921

5922
static const struct __x86_intercept {
5923 5924 5925 5926 5927 5928 5929 5930
	u32 exit_code;
	enum x86_intercept_stage stage;
} x86_intercept_map[] = {
	[x86_intercept_cr_read]		= POST_EX(SVM_EXIT_READ_CR0),
	[x86_intercept_cr_write]	= POST_EX(SVM_EXIT_WRITE_CR0),
	[x86_intercept_clts]		= POST_EX(SVM_EXIT_WRITE_CR0),
	[x86_intercept_lmsw]		= POST_EX(SVM_EXIT_WRITE_CR0),
	[x86_intercept_smsw]		= POST_EX(SVM_EXIT_READ_CR0),
5931 5932
	[x86_intercept_dr_read]		= POST_EX(SVM_EXIT_READ_DR0),
	[x86_intercept_dr_write]	= POST_EX(SVM_EXIT_WRITE_DR0),
5933 5934 5935 5936 5937 5938 5939 5940
	[x86_intercept_sldt]		= POST_EX(SVM_EXIT_LDTR_READ),
	[x86_intercept_str]		= POST_EX(SVM_EXIT_TR_READ),
	[x86_intercept_lldt]		= POST_EX(SVM_EXIT_LDTR_WRITE),
	[x86_intercept_ltr]		= POST_EX(SVM_EXIT_TR_WRITE),
	[x86_intercept_sgdt]		= POST_EX(SVM_EXIT_GDTR_READ),
	[x86_intercept_sidt]		= POST_EX(SVM_EXIT_IDTR_READ),
	[x86_intercept_lgdt]		= POST_EX(SVM_EXIT_GDTR_WRITE),
	[x86_intercept_lidt]		= POST_EX(SVM_EXIT_IDTR_WRITE),
5941 5942 5943 5944 5945 5946 5947 5948
	[x86_intercept_vmrun]		= POST_EX(SVM_EXIT_VMRUN),
	[x86_intercept_vmmcall]		= POST_EX(SVM_EXIT_VMMCALL),
	[x86_intercept_vmload]		= POST_EX(SVM_EXIT_VMLOAD),
	[x86_intercept_vmsave]		= POST_EX(SVM_EXIT_VMSAVE),
	[x86_intercept_stgi]		= POST_EX(SVM_EXIT_STGI),
	[x86_intercept_clgi]		= POST_EX(SVM_EXIT_CLGI),
	[x86_intercept_skinit]		= POST_EX(SVM_EXIT_SKINIT),
	[x86_intercept_invlpga]		= POST_EX(SVM_EXIT_INVLPGA),
5949 5950 5951
	[x86_intercept_rdtscp]		= POST_EX(SVM_EXIT_RDTSCP),
	[x86_intercept_monitor]		= POST_MEM(SVM_EXIT_MONITOR),
	[x86_intercept_mwait]		= POST_EX(SVM_EXIT_MWAIT),
5952 5953 5954 5955 5956 5957 5958 5959 5960
	[x86_intercept_invlpg]		= POST_EX(SVM_EXIT_INVLPG),
	[x86_intercept_invd]		= POST_EX(SVM_EXIT_INVD),
	[x86_intercept_wbinvd]		= POST_EX(SVM_EXIT_WBINVD),
	[x86_intercept_wrmsr]		= POST_EX(SVM_EXIT_MSR),
	[x86_intercept_rdtsc]		= POST_EX(SVM_EXIT_RDTSC),
	[x86_intercept_rdmsr]		= POST_EX(SVM_EXIT_MSR),
	[x86_intercept_rdpmc]		= POST_EX(SVM_EXIT_RDPMC),
	[x86_intercept_cpuid]		= PRE_EX(SVM_EXIT_CPUID),
	[x86_intercept_rsm]		= PRE_EX(SVM_EXIT_RSM),
5961 5962 5963 5964 5965 5966 5967
	[x86_intercept_pause]		= PRE_EX(SVM_EXIT_PAUSE),
	[x86_intercept_pushf]		= PRE_EX(SVM_EXIT_PUSHF),
	[x86_intercept_popf]		= PRE_EX(SVM_EXIT_POPF),
	[x86_intercept_intn]		= PRE_EX(SVM_EXIT_SWINT),
	[x86_intercept_iret]		= PRE_EX(SVM_EXIT_IRET),
	[x86_intercept_icebp]		= PRE_EX(SVM_EXIT_ICEBP),
	[x86_intercept_hlt]		= POST_EX(SVM_EXIT_HLT),
5968 5969 5970 5971
	[x86_intercept_in]		= POST_EX(SVM_EXIT_IOIO),
	[x86_intercept_ins]		= POST_EX(SVM_EXIT_IOIO),
	[x86_intercept_out]		= POST_EX(SVM_EXIT_IOIO),
	[x86_intercept_outs]		= POST_EX(SVM_EXIT_IOIO),
5972 5973
};

5974
#undef PRE_EX
5975
#undef POST_EX
5976
#undef POST_MEM
5977

5978 5979 5980 5981
static int svm_check_intercept(struct kvm_vcpu *vcpu,
			       struct x86_instruction_info *info,
			       enum x86_intercept_stage stage)
{
5982 5983 5984 5985 5986 5987 5988 5989 5990 5991
	struct vcpu_svm *svm = to_svm(vcpu);
	int vmexit, ret = X86EMUL_CONTINUE;
	struct __x86_intercept icpt_info;
	struct vmcb *vmcb = svm->vmcb;

	if (info->intercept >= ARRAY_SIZE(x86_intercept_map))
		goto out;

	icpt_info = x86_intercept_map[info->intercept];

5992
	if (stage != icpt_info.stage)
5993 5994 5995 5996 5997 5998 5999 6000 6001 6002 6003 6004 6005 6006
		goto out;

	switch (icpt_info.exit_code) {
	case SVM_EXIT_READ_CR0:
		if (info->intercept == x86_intercept_cr_read)
			icpt_info.exit_code += info->modrm_reg;
		break;
	case SVM_EXIT_WRITE_CR0: {
		unsigned long cr0, val;
		u64 intercept;

		if (info->intercept == x86_intercept_cr_write)
			icpt_info.exit_code += info->modrm_reg;

6007 6008
		if (icpt_info.exit_code != SVM_EXIT_WRITE_CR0 ||
		    info->intercept == x86_intercept_clts)
6009 6010 6011 6012 6013 6014 6015 6016 6017 6018 6019 6020 6021 6022 6023 6024 6025 6026 6027 6028 6029 6030 6031
			break;

		intercept = svm->nested.intercept;

		if (!(intercept & (1ULL << INTERCEPT_SELECTIVE_CR0)))
			break;

		cr0 = vcpu->arch.cr0 & ~SVM_CR0_SELECTIVE_MASK;
		val = info->src_val  & ~SVM_CR0_SELECTIVE_MASK;

		if (info->intercept == x86_intercept_lmsw) {
			cr0 &= 0xfUL;
			val &= 0xfUL;
			/* lmsw can't clear PE - catch this here */
			if (cr0 & X86_CR0_PE)
				val |= X86_CR0_PE;
		}

		if (cr0 ^ val)
			icpt_info.exit_code = SVM_EXIT_CR0_SEL_WRITE;

		break;
	}
6032 6033 6034 6035
	case SVM_EXIT_READ_DR0:
	case SVM_EXIT_WRITE_DR0:
		icpt_info.exit_code += info->modrm_reg;
		break;
6036 6037 6038 6039 6040 6041
	case SVM_EXIT_MSR:
		if (info->intercept == x86_intercept_wrmsr)
			vmcb->control.exit_info_1 = 1;
		else
			vmcb->control.exit_info_1 = 0;
		break;
6042 6043 6044 6045 6046 6047 6048
	case SVM_EXIT_PAUSE:
		/*
		 * We get this for NOP only, but pause
		 * is rep not, check this here
		 */
		if (info->rep_prefix != REPE_PREFIX)
			goto out;
6049
		break;
6050 6051 6052 6053 6054 6055
	case SVM_EXIT_IOIO: {
		u64 exit_info;
		u32 bytes;

		if (info->intercept == x86_intercept_in ||
		    info->intercept == x86_intercept_ins) {
6056 6057
			exit_info = ((info->src_val & 0xffff) << 16) |
				SVM_IOIO_TYPE_MASK;
6058
			bytes = info->dst_bytes;
6059
		} else {
6060
			exit_info = (info->dst_val & 0xffff) << 16;
6061
			bytes = info->src_bytes;
6062 6063 6064 6065 6066 6067 6068 6069 6070 6071 6072 6073 6074 6075 6076 6077 6078 6079 6080 6081
		}

		if (info->intercept == x86_intercept_outs ||
		    info->intercept == x86_intercept_ins)
			exit_info |= SVM_IOIO_STR_MASK;

		if (info->rep_prefix)
			exit_info |= SVM_IOIO_REP_MASK;

		bytes = min(bytes, 4u);

		exit_info |= bytes << SVM_IOIO_SIZE_SHIFT;

		exit_info |= (u32)info->ad_bytes << (SVM_IOIO_ASIZE_SHIFT - 1);

		vmcb->control.exit_info_1 = exit_info;
		vmcb->control.exit_info_2 = info->next_rip;

		break;
	}
6082 6083 6084 6085
	default:
		break;
	}

6086 6087 6088
	/* TODO: Advertise NRIPS to guest hypervisor unconditionally */
	if (static_cpu_has(X86_FEATURE_NRIPS))
		vmcb->control.next_rip  = info->next_rip;
6089 6090 6091 6092 6093 6094 6095 6096
	vmcb->control.exit_code = icpt_info.exit_code;
	vmexit = nested_svm_exit_handled(svm);

	ret = (vmexit == NESTED_EXIT_DONE) ? X86EMUL_INTERCEPTED
					   : X86EMUL_CONTINUE;

out:
	return ret;
6097 6098
}

6099 6100 6101
static void svm_handle_external_intr(struct kvm_vcpu *vcpu)
{
	local_irq_enable();
P
Paolo Bonzini 已提交
6102 6103 6104 6105 6106 6107
	/*
	 * We must have an instruction with interrupts enabled, so
	 * the timer interrupt isn't delayed by the interrupt shadow.
	 */
	asm("nop");
	local_irq_disable();
6108 6109
}

6110 6111
static void svm_sched_in(struct kvm_vcpu *vcpu, int cpu)
{
6112 6113
	if (pause_filter_thresh)
		shrink_ple_window(vcpu);
6114 6115
}

6116 6117 6118 6119 6120 6121 6122 6123 6124
static inline void avic_post_state_restore(struct kvm_vcpu *vcpu)
{
	if (avic_handle_apic_id_update(vcpu) != 0)
		return;
	if (avic_handle_dfr_update(vcpu) != 0)
		return;
	avic_handle_ldr_update(vcpu);
}

6125 6126 6127 6128 6129 6130
static void svm_setup_mce(struct kvm_vcpu *vcpu)
{
	/* [63:9] are reserved. */
	vcpu->arch.mcg_cap &= 0x1ff;
}

6131 6132
static int svm_smi_allowed(struct kvm_vcpu *vcpu)
{
6133 6134 6135 6136 6137 6138 6139 6140 6141 6142 6143 6144 6145 6146
	struct vcpu_svm *svm = to_svm(vcpu);

	/* Per APM Vol.2 15.22.2 "Response to SMI" */
	if (!gif_set(svm))
		return 0;

	if (is_guest_mode(&svm->vcpu) &&
	    svm->nested.intercept & (1ULL << INTERCEPT_SMI)) {
		/* TODO: Might need to set exit_info_1 and exit_info_2 here */
		svm->vmcb->control.exit_code = SVM_EXIT_SMI;
		svm->nested.exit_required = true;
		return 0;
	}

6147 6148 6149
	return 1;
}

6150 6151
static int svm_pre_enter_smm(struct kvm_vcpu *vcpu, char *smstate)
{
6152 6153 6154 6155 6156 6157 6158 6159 6160 6161 6162 6163 6164 6165 6166 6167 6168
	struct vcpu_svm *svm = to_svm(vcpu);
	int ret;

	if (is_guest_mode(vcpu)) {
		/* FED8h - SVM Guest */
		put_smstate(u64, smstate, 0x7ed8, 1);
		/* FEE0h - SVM Guest VMCB Physical Address */
		put_smstate(u64, smstate, 0x7ee0, svm->nested.vmcb);

		svm->vmcb->save.rax = vcpu->arch.regs[VCPU_REGS_RAX];
		svm->vmcb->save.rsp = vcpu->arch.regs[VCPU_REGS_RSP];
		svm->vmcb->save.rip = vcpu->arch.regs[VCPU_REGS_RIP];

		ret = nested_svm_vmexit(svm);
		if (ret)
			return ret;
	}
6169 6170 6171 6172 6173
	return 0;
}

static int svm_pre_leave_smm(struct kvm_vcpu *vcpu, u64 smbase)
{
6174 6175 6176 6177 6178 6179 6180 6181 6182 6183 6184 6185 6186 6187 6188 6189 6190 6191 6192 6193 6194 6195 6196 6197
	struct vcpu_svm *svm = to_svm(vcpu);
	struct vmcb *nested_vmcb;
	struct page *page;
	struct {
		u64 guest;
		u64 vmcb;
	} svm_state_save;
	int ret;

	ret = kvm_vcpu_read_guest(vcpu, smbase + 0xfed8, &svm_state_save,
				  sizeof(svm_state_save));
	if (ret)
		return ret;

	if (svm_state_save.guest) {
		vcpu->arch.hflags &= ~HF_SMM_MASK;
		nested_vmcb = nested_svm_map(svm, svm_state_save.vmcb, &page);
		if (nested_vmcb)
			enter_svm_guest_mode(svm, svm_state_save.vmcb, nested_vmcb, page);
		else
			ret = 1;
		vcpu->arch.hflags |= HF_SMM_MASK;
	}
	return ret;
6198 6199
}

6200 6201 6202 6203 6204 6205 6206 6207 6208 6209 6210 6211 6212
static int enable_smi_window(struct kvm_vcpu *vcpu)
{
	struct vcpu_svm *svm = to_svm(vcpu);

	if (!gif_set(svm)) {
		if (vgif_enabled(svm))
			set_intercept(svm, INTERCEPT_STGI);
		/* STGI will cause a vm exit */
		return 1;
	}
	return 0;
}

B
Brijesh Singh 已提交
6213 6214 6215 6216 6217 6218 6219 6220 6221 6222 6223 6224 6225 6226 6227 6228 6229
static int sev_asid_new(void)
{
	int pos;

	/*
	 * SEV-enabled guest must use asid from min_sev_asid to max_sev_asid.
	 */
	pos = find_next_zero_bit(sev_asid_bitmap, max_sev_asid, min_sev_asid - 1);
	if (pos >= max_sev_asid)
		return -EBUSY;

	set_bit(pos, sev_asid_bitmap);
	return pos + 1;
}

static int sev_guest_init(struct kvm *kvm, struct kvm_sev_cmd *argp)
{
6230
	struct kvm_sev_info *sev = &to_kvm_svm(kvm)->sev_info;
B
Brijesh Singh 已提交
6231 6232 6233 6234 6235 6236 6237 6238 6239 6240 6241 6242 6243
	int asid, ret;

	ret = -EBUSY;
	asid = sev_asid_new();
	if (asid < 0)
		return ret;

	ret = sev_platform_init(&argp->error);
	if (ret)
		goto e_free;

	sev->active = true;
	sev->asid = asid;
6244
	INIT_LIST_HEAD(&sev->regions_list);
B
Brijesh Singh 已提交
6245 6246 6247 6248 6249 6250 6251 6252

	return 0;

e_free:
	__sev_asid_free(asid);
	return ret;
}

6253 6254 6255 6256 6257 6258 6259 6260 6261 6262 6263 6264 6265 6266 6267 6268 6269 6270 6271 6272 6273 6274 6275 6276 6277
static int sev_bind_asid(struct kvm *kvm, unsigned int handle, int *error)
{
	struct sev_data_activate *data;
	int asid = sev_get_asid(kvm);
	int ret;

	wbinvd_on_all_cpus();

	ret = sev_guest_df_flush(error);
	if (ret)
		return ret;

	data = kzalloc(sizeof(*data), GFP_KERNEL);
	if (!data)
		return -ENOMEM;

	/* activate ASID on the given handle */
	data->handle = handle;
	data->asid   = asid;
	ret = sev_guest_activate(data, error);
	kfree(data);

	return ret;
}

6278
static int __sev_issue_cmd(int fd, int id, void *data, int *error)
6279 6280 6281 6282 6283 6284 6285 6286 6287 6288 6289 6290 6291 6292
{
	struct fd f;
	int ret;

	f = fdget(fd);
	if (!f.file)
		return -EBADF;

	ret = sev_issue_cmd_external_user(f.file, id, data, error);

	fdput(f);
	return ret;
}

6293 6294
static int sev_issue_cmd(struct kvm *kvm, int id, void *data, int *error)
{
6295
	struct kvm_sev_info *sev = &to_kvm_svm(kvm)->sev_info;
6296 6297 6298 6299

	return __sev_issue_cmd(sev->fd, id, data, error);
}

6300 6301
static int sev_launch_start(struct kvm *kvm, struct kvm_sev_cmd *argp)
{
6302
	struct kvm_sev_info *sev = &to_kvm_svm(kvm)->sev_info;
6303 6304 6305 6306 6307 6308 6309 6310 6311 6312 6313 6314 6315 6316 6317 6318 6319 6320 6321 6322 6323 6324 6325 6326 6327 6328 6329 6330 6331 6332 6333 6334 6335 6336 6337 6338 6339 6340 6341 6342 6343 6344 6345 6346
	struct sev_data_launch_start *start;
	struct kvm_sev_launch_start params;
	void *dh_blob, *session_blob;
	int *error = &argp->error;
	int ret;

	if (!sev_guest(kvm))
		return -ENOTTY;

	if (copy_from_user(&params, (void __user *)(uintptr_t)argp->data, sizeof(params)))
		return -EFAULT;

	start = kzalloc(sizeof(*start), GFP_KERNEL);
	if (!start)
		return -ENOMEM;

	dh_blob = NULL;
	if (params.dh_uaddr) {
		dh_blob = psp_copy_user_blob(params.dh_uaddr, params.dh_len);
		if (IS_ERR(dh_blob)) {
			ret = PTR_ERR(dh_blob);
			goto e_free;
		}

		start->dh_cert_address = __sme_set(__pa(dh_blob));
		start->dh_cert_len = params.dh_len;
	}

	session_blob = NULL;
	if (params.session_uaddr) {
		session_blob = psp_copy_user_blob(params.session_uaddr, params.session_len);
		if (IS_ERR(session_blob)) {
			ret = PTR_ERR(session_blob);
			goto e_free_dh;
		}

		start->session_address = __sme_set(__pa(session_blob));
		start->session_len = params.session_len;
	}

	start->handle = params.handle;
	start->policy = params.policy;

	/* create memory encryption context */
6347
	ret = __sev_issue_cmd(argp->sev_fd, SEV_CMD_LAUNCH_START, start, error);
6348 6349 6350 6351 6352 6353 6354 6355 6356 6357 6358 6359 6360 6361 6362 6363 6364 6365 6366 6367 6368 6369 6370 6371 6372 6373 6374 6375
	if (ret)
		goto e_free_session;

	/* Bind ASID to this guest */
	ret = sev_bind_asid(kvm, start->handle, error);
	if (ret)
		goto e_free_session;

	/* return handle to userspace */
	params.handle = start->handle;
	if (copy_to_user((void __user *)(uintptr_t)argp->data, &params, sizeof(params))) {
		sev_unbind_asid(kvm, start->handle);
		ret = -EFAULT;
		goto e_free_session;
	}

	sev->handle = start->handle;
	sev->fd = argp->sev_fd;

e_free_session:
	kfree(session_blob);
e_free_dh:
	kfree(dh_blob);
e_free:
	kfree(start);
	return ret;
}

6376 6377 6378 6379 6380 6381 6382 6383 6384 6385 6386 6387 6388 6389 6390 6391 6392 6393 6394 6395 6396 6397 6398 6399
static int get_num_contig_pages(int idx, struct page **inpages,
				unsigned long npages)
{
	unsigned long paddr, next_paddr;
	int i = idx + 1, pages = 1;

	/* find the number of contiguous pages starting from idx */
	paddr = __sme_page_pa(inpages[idx]);
	while (i < npages) {
		next_paddr = __sme_page_pa(inpages[i++]);
		if ((paddr + PAGE_SIZE) == next_paddr) {
			pages++;
			paddr = next_paddr;
			continue;
		}
		break;
	}

	return pages;
}

static int sev_launch_update_data(struct kvm *kvm, struct kvm_sev_cmd *argp)
{
	unsigned long vaddr, vaddr_end, next_vaddr, npages, size;
6400
	struct kvm_sev_info *sev = &to_kvm_svm(kvm)->sev_info;
6401 6402 6403 6404 6405 6406 6407 6408 6409 6410 6411 6412 6413 6414 6415 6416 6417 6418 6419 6420 6421 6422 6423 6424 6425 6426 6427 6428 6429 6430 6431 6432 6433 6434 6435 6436 6437 6438 6439 6440 6441 6442 6443 6444 6445 6446 6447 6448 6449 6450 6451 6452 6453 6454 6455 6456 6457 6458 6459 6460 6461 6462 6463 6464 6465 6466 6467 6468 6469 6470 6471 6472
	struct kvm_sev_launch_update_data params;
	struct sev_data_launch_update_data *data;
	struct page **inpages;
	int i, ret, pages;

	if (!sev_guest(kvm))
		return -ENOTTY;

	if (copy_from_user(&params, (void __user *)(uintptr_t)argp->data, sizeof(params)))
		return -EFAULT;

	data = kzalloc(sizeof(*data), GFP_KERNEL);
	if (!data)
		return -ENOMEM;

	vaddr = params.uaddr;
	size = params.len;
	vaddr_end = vaddr + size;

	/* Lock the user memory. */
	inpages = sev_pin_memory(kvm, vaddr, size, &npages, 1);
	if (!inpages) {
		ret = -ENOMEM;
		goto e_free;
	}

	/*
	 * The LAUNCH_UPDATE command will perform in-place encryption of the
	 * memory content (i.e it will write the same memory region with C=1).
	 * It's possible that the cache may contain the data with C=0, i.e.,
	 * unencrypted so invalidate it first.
	 */
	sev_clflush_pages(inpages, npages);

	for (i = 0; vaddr < vaddr_end; vaddr = next_vaddr, i += pages) {
		int offset, len;

		/*
		 * If the user buffer is not page-aligned, calculate the offset
		 * within the page.
		 */
		offset = vaddr & (PAGE_SIZE - 1);

		/* Calculate the number of pages that can be encrypted in one go. */
		pages = get_num_contig_pages(i, inpages, npages);

		len = min_t(size_t, ((pages * PAGE_SIZE) - offset), size);

		data->handle = sev->handle;
		data->len = len;
		data->address = __sme_page_pa(inpages[i]) + offset;
		ret = sev_issue_cmd(kvm, SEV_CMD_LAUNCH_UPDATE_DATA, data, &argp->error);
		if (ret)
			goto e_unpin;

		size -= len;
		next_vaddr = vaddr + len;
	}

e_unpin:
	/* content of memory is updated, mark pages dirty */
	for (i = 0; i < npages; i++) {
		set_page_dirty_lock(inpages[i]);
		mark_page_accessed(inpages[i]);
	}
	/* unlock the user pages */
	sev_unpin_memory(kvm, inpages, npages);
e_free:
	kfree(data);
	return ret;
}

6473 6474
static int sev_launch_measure(struct kvm *kvm, struct kvm_sev_cmd *argp)
{
6475
	void __user *measure = (void __user *)(uintptr_t)argp->data;
6476
	struct kvm_sev_info *sev = &to_kvm_svm(kvm)->sev_info;
6477 6478
	struct sev_data_launch_measure *data;
	struct kvm_sev_launch_measure params;
6479
	void __user *p = NULL;
6480 6481 6482 6483 6484 6485
	void *blob = NULL;
	int ret;

	if (!sev_guest(kvm))
		return -ENOTTY;

6486
	if (copy_from_user(&params, measure, sizeof(params)))
6487 6488 6489 6490 6491 6492 6493 6494 6495 6496
		return -EFAULT;

	data = kzalloc(sizeof(*data), GFP_KERNEL);
	if (!data)
		return -ENOMEM;

	/* User wants to query the blob length */
	if (!params.len)
		goto cmd;

6497 6498
	p = (void __user *)(uintptr_t)params.uaddr;
	if (p) {
6499 6500 6501 6502 6503 6504 6505 6506 6507 6508 6509 6510 6511 6512 6513 6514 6515 6516 6517 6518 6519 6520 6521 6522 6523 6524 6525 6526
		if (params.len > SEV_FW_BLOB_MAX_SIZE) {
			ret = -EINVAL;
			goto e_free;
		}

		ret = -ENOMEM;
		blob = kmalloc(params.len, GFP_KERNEL);
		if (!blob)
			goto e_free;

		data->address = __psp_pa(blob);
		data->len = params.len;
	}

cmd:
	data->handle = sev->handle;
	ret = sev_issue_cmd(kvm, SEV_CMD_LAUNCH_MEASURE, data, &argp->error);

	/*
	 * If we query the session length, FW responded with expected data.
	 */
	if (!params.len)
		goto done;

	if (ret)
		goto e_free_blob;

	if (blob) {
6527
		if (copy_to_user(p, blob, params.len))
6528 6529 6530 6531 6532
			ret = -EFAULT;
	}

done:
	params.len = data->len;
6533
	if (copy_to_user(measure, &params, sizeof(params)))
6534 6535 6536 6537 6538 6539 6540 6541
		ret = -EFAULT;
e_free_blob:
	kfree(blob);
e_free:
	kfree(data);
	return ret;
}

6542 6543
static int sev_launch_finish(struct kvm *kvm, struct kvm_sev_cmd *argp)
{
6544
	struct kvm_sev_info *sev = &to_kvm_svm(kvm)->sev_info;
6545 6546 6547 6548 6549 6550 6551 6552 6553 6554 6555 6556 6557 6558 6559 6560 6561
	struct sev_data_launch_finish *data;
	int ret;

	if (!sev_guest(kvm))
		return -ENOTTY;

	data = kzalloc(sizeof(*data), GFP_KERNEL);
	if (!data)
		return -ENOMEM;

	data->handle = sev->handle;
	ret = sev_issue_cmd(kvm, SEV_CMD_LAUNCH_FINISH, data, &argp->error);

	kfree(data);
	return ret;
}

6562 6563
static int sev_guest_status(struct kvm *kvm, struct kvm_sev_cmd *argp)
{
6564
	struct kvm_sev_info *sev = &to_kvm_svm(kvm)->sev_info;
6565 6566 6567 6568 6569 6570 6571 6572 6573 6574 6575 6576 6577 6578 6579 6580 6581 6582 6583 6584 6585 6586 6587 6588 6589 6590 6591
	struct kvm_sev_guest_status params;
	struct sev_data_guest_status *data;
	int ret;

	if (!sev_guest(kvm))
		return -ENOTTY;

	data = kzalloc(sizeof(*data), GFP_KERNEL);
	if (!data)
		return -ENOMEM;

	data->handle = sev->handle;
	ret = sev_issue_cmd(kvm, SEV_CMD_GUEST_STATUS, data, &argp->error);
	if (ret)
		goto e_free;

	params.policy = data->policy;
	params.state = data->state;
	params.handle = data->handle;

	if (copy_to_user((void __user *)(uintptr_t)argp->data, &params, sizeof(params)))
		ret = -EFAULT;
e_free:
	kfree(data);
	return ret;
}

6592 6593 6594 6595
static int __sev_issue_dbg_cmd(struct kvm *kvm, unsigned long src,
			       unsigned long dst, int size,
			       int *error, bool enc)
{
6596
	struct kvm_sev_info *sev = &to_kvm_svm(kvm)->sev_info;
6597 6598 6599 6600 6601 6602 6603 6604 6605 6606 6607 6608 6609 6610 6611 6612 6613 6614 6615 6616 6617 6618 6619 6620 6621 6622 6623 6624 6625 6626 6627 6628 6629 6630 6631 6632 6633 6634 6635 6636 6637 6638 6639 6640 6641 6642 6643 6644 6645 6646 6647 6648 6649 6650 6651 6652 6653 6654 6655 6656 6657 6658 6659 6660 6661 6662 6663 6664 6665 6666 6667 6668
	struct sev_data_dbg *data;
	int ret;

	data = kzalloc(sizeof(*data), GFP_KERNEL);
	if (!data)
		return -ENOMEM;

	data->handle = sev->handle;
	data->dst_addr = dst;
	data->src_addr = src;
	data->len = size;

	ret = sev_issue_cmd(kvm,
			    enc ? SEV_CMD_DBG_ENCRYPT : SEV_CMD_DBG_DECRYPT,
			    data, error);
	kfree(data);
	return ret;
}

static int __sev_dbg_decrypt(struct kvm *kvm, unsigned long src_paddr,
			     unsigned long dst_paddr, int sz, int *err)
{
	int offset;

	/*
	 * Its safe to read more than we are asked, caller should ensure that
	 * destination has enough space.
	 */
	src_paddr = round_down(src_paddr, 16);
	offset = src_paddr & 15;
	sz = round_up(sz + offset, 16);

	return __sev_issue_dbg_cmd(kvm, src_paddr, dst_paddr, sz, err, false);
}

static int __sev_dbg_decrypt_user(struct kvm *kvm, unsigned long paddr,
				  unsigned long __user dst_uaddr,
				  unsigned long dst_paddr,
				  int size, int *err)
{
	struct page *tpage = NULL;
	int ret, offset;

	/* if inputs are not 16-byte then use intermediate buffer */
	if (!IS_ALIGNED(dst_paddr, 16) ||
	    !IS_ALIGNED(paddr,     16) ||
	    !IS_ALIGNED(size,      16)) {
		tpage = (void *)alloc_page(GFP_KERNEL);
		if (!tpage)
			return -ENOMEM;

		dst_paddr = __sme_page_pa(tpage);
	}

	ret = __sev_dbg_decrypt(kvm, paddr, dst_paddr, size, err);
	if (ret)
		goto e_free;

	if (tpage) {
		offset = paddr & 15;
		if (copy_to_user((void __user *)(uintptr_t)dst_uaddr,
				 page_address(tpage) + offset, size))
			ret = -EFAULT;
	}

e_free:
	if (tpage)
		__free_page(tpage);

	return ret;
}

6669 6670 6671 6672 6673 6674 6675 6676 6677 6678 6679 6680 6681 6682 6683 6684 6685 6686 6687 6688 6689 6690 6691 6692 6693 6694 6695 6696 6697 6698 6699 6700 6701 6702 6703 6704 6705 6706 6707 6708 6709 6710 6711 6712 6713 6714 6715 6716 6717 6718 6719 6720 6721 6722 6723 6724 6725 6726 6727 6728 6729 6730 6731 6732 6733 6734 6735 6736 6737 6738 6739 6740 6741 6742 6743 6744 6745
static int __sev_dbg_encrypt_user(struct kvm *kvm, unsigned long paddr,
				  unsigned long __user vaddr,
				  unsigned long dst_paddr,
				  unsigned long __user dst_vaddr,
				  int size, int *error)
{
	struct page *src_tpage = NULL;
	struct page *dst_tpage = NULL;
	int ret, len = size;

	/* If source buffer is not aligned then use an intermediate buffer */
	if (!IS_ALIGNED(vaddr, 16)) {
		src_tpage = alloc_page(GFP_KERNEL);
		if (!src_tpage)
			return -ENOMEM;

		if (copy_from_user(page_address(src_tpage),
				(void __user *)(uintptr_t)vaddr, size)) {
			__free_page(src_tpage);
			return -EFAULT;
		}

		paddr = __sme_page_pa(src_tpage);
	}

	/*
	 *  If destination buffer or length is not aligned then do read-modify-write:
	 *   - decrypt destination in an intermediate buffer
	 *   - copy the source buffer in an intermediate buffer
	 *   - use the intermediate buffer as source buffer
	 */
	if (!IS_ALIGNED(dst_vaddr, 16) || !IS_ALIGNED(size, 16)) {
		int dst_offset;

		dst_tpage = alloc_page(GFP_KERNEL);
		if (!dst_tpage) {
			ret = -ENOMEM;
			goto e_free;
		}

		ret = __sev_dbg_decrypt(kvm, dst_paddr,
					__sme_page_pa(dst_tpage), size, error);
		if (ret)
			goto e_free;

		/*
		 *  If source is kernel buffer then use memcpy() otherwise
		 *  copy_from_user().
		 */
		dst_offset = dst_paddr & 15;

		if (src_tpage)
			memcpy(page_address(dst_tpage) + dst_offset,
			       page_address(src_tpage), size);
		else {
			if (copy_from_user(page_address(dst_tpage) + dst_offset,
					   (void __user *)(uintptr_t)vaddr, size)) {
				ret = -EFAULT;
				goto e_free;
			}
		}

		paddr = __sme_page_pa(dst_tpage);
		dst_paddr = round_down(dst_paddr, 16);
		len = round_up(size, 16);
	}

	ret = __sev_issue_dbg_cmd(kvm, paddr, dst_paddr, len, error, true);

e_free:
	if (src_tpage)
		__free_page(src_tpage);
	if (dst_tpage)
		__free_page(dst_tpage);
	return ret;
}

6746 6747 6748
static int sev_dbg_crypt(struct kvm *kvm, struct kvm_sev_cmd *argp, bool dec)
{
	unsigned long vaddr, vaddr_end, next_vaddr;
6749
	unsigned long dst_vaddr;
6750 6751 6752 6753 6754 6755 6756 6757 6758 6759 6760 6761 6762 6763 6764 6765 6766 6767 6768 6769 6770 6771 6772 6773 6774 6775 6776 6777 6778 6779 6780 6781 6782 6783 6784 6785 6786 6787 6788 6789 6790 6791 6792 6793 6794 6795 6796
	struct page **src_p, **dst_p;
	struct kvm_sev_dbg debug;
	unsigned long n;
	int ret, size;

	if (!sev_guest(kvm))
		return -ENOTTY;

	if (copy_from_user(&debug, (void __user *)(uintptr_t)argp->data, sizeof(debug)))
		return -EFAULT;

	vaddr = debug.src_uaddr;
	size = debug.len;
	vaddr_end = vaddr + size;
	dst_vaddr = debug.dst_uaddr;

	for (; vaddr < vaddr_end; vaddr = next_vaddr) {
		int len, s_off, d_off;

		/* lock userspace source and destination page */
		src_p = sev_pin_memory(kvm, vaddr & PAGE_MASK, PAGE_SIZE, &n, 0);
		if (!src_p)
			return -EFAULT;

		dst_p = sev_pin_memory(kvm, dst_vaddr & PAGE_MASK, PAGE_SIZE, &n, 1);
		if (!dst_p) {
			sev_unpin_memory(kvm, src_p, n);
			return -EFAULT;
		}

		/*
		 * The DBG_{DE,EN}CRYPT commands will perform {dec,en}cryption of the
		 * memory content (i.e it will write the same memory region with C=1).
		 * It's possible that the cache may contain the data with C=0, i.e.,
		 * unencrypted so invalidate it first.
		 */
		sev_clflush_pages(src_p, 1);
		sev_clflush_pages(dst_p, 1);

		/*
		 * Since user buffer may not be page aligned, calculate the
		 * offset within the page.
		 */
		s_off = vaddr & ~PAGE_MASK;
		d_off = dst_vaddr & ~PAGE_MASK;
		len = min_t(size_t, (PAGE_SIZE - s_off), size);

6797 6798 6799 6800 6801 6802 6803 6804 6805 6806 6807 6808 6809
		if (dec)
			ret = __sev_dbg_decrypt_user(kvm,
						     __sme_page_pa(src_p[0]) + s_off,
						     dst_vaddr,
						     __sme_page_pa(dst_p[0]) + d_off,
						     len, &argp->error);
		else
			ret = __sev_dbg_encrypt_user(kvm,
						     __sme_page_pa(src_p[0]) + s_off,
						     vaddr,
						     __sme_page_pa(dst_p[0]) + d_off,
						     dst_vaddr,
						     len, &argp->error);
6810 6811 6812 6813 6814 6815 6816 6817 6818 6819 6820 6821 6822 6823 6824

		sev_unpin_memory(kvm, src_p, 1);
		sev_unpin_memory(kvm, dst_p, 1);

		if (ret)
			goto err;

		next_vaddr = vaddr + len;
		dst_vaddr = dst_vaddr + len;
		size -= len;
	}
err:
	return ret;
}

6825 6826
static int sev_launch_secret(struct kvm *kvm, struct kvm_sev_cmd *argp)
{
6827
	struct kvm_sev_info *sev = &to_kvm_svm(kvm)->sev_info;
6828 6829 6830 6831 6832
	struct sev_data_launch_secret *data;
	struct kvm_sev_launch_secret params;
	struct page **pages;
	void *blob, *hdr;
	unsigned long n;
6833
	int ret, offset;
6834 6835 6836 6837 6838 6839 6840 6841 6842 6843 6844 6845 6846 6847 6848 6849 6850 6851 6852 6853 6854 6855 6856 6857 6858

	if (!sev_guest(kvm))
		return -ENOTTY;

	if (copy_from_user(&params, (void __user *)(uintptr_t)argp->data, sizeof(params)))
		return -EFAULT;

	pages = sev_pin_memory(kvm, params.guest_uaddr, params.guest_len, &n, 1);
	if (!pages)
		return -ENOMEM;

	/*
	 * The secret must be copied into contiguous memory region, lets verify
	 * that userspace memory pages are contiguous before we issue command.
	 */
	if (get_num_contig_pages(0, pages, n) != n) {
		ret = -EINVAL;
		goto e_unpin_memory;
	}

	ret = -ENOMEM;
	data = kzalloc(sizeof(*data), GFP_KERNEL);
	if (!data)
		goto e_unpin_memory;

6859 6860 6861 6862
	offset = params.guest_uaddr & (PAGE_SIZE - 1);
	data->guest_address = __sme_page_pa(pages[0]) + offset;
	data->guest_len = params.guest_len;

6863 6864 6865 6866 6867 6868 6869 6870 6871 6872 6873 6874 6875 6876
	blob = psp_copy_user_blob(params.trans_uaddr, params.trans_len);
	if (IS_ERR(blob)) {
		ret = PTR_ERR(blob);
		goto e_free;
	}

	data->trans_address = __psp_pa(blob);
	data->trans_len = params.trans_len;

	hdr = psp_copy_user_blob(params.hdr_uaddr, params.hdr_len);
	if (IS_ERR(hdr)) {
		ret = PTR_ERR(hdr);
		goto e_free_blob;
	}
6877 6878
	data->hdr_address = __psp_pa(hdr);
	data->hdr_len = params.hdr_len;
6879 6880 6881 6882 6883 6884 6885 6886 6887 6888 6889 6890 6891 6892 6893

	data->handle = sev->handle;
	ret = sev_issue_cmd(kvm, SEV_CMD_LAUNCH_UPDATE_SECRET, data, &argp->error);

	kfree(hdr);

e_free_blob:
	kfree(blob);
e_free:
	kfree(data);
e_unpin_memory:
	sev_unpin_memory(kvm, pages, n);
	return ret;
}

B
Brijesh Singh 已提交
6894 6895 6896 6897 6898 6899 6900 6901 6902 6903 6904 6905 6906 6907 6908 6909 6910
static int svm_mem_enc_op(struct kvm *kvm, void __user *argp)
{
	struct kvm_sev_cmd sev_cmd;
	int r;

	if (!svm_sev_enabled())
		return -ENOTTY;

	if (copy_from_user(&sev_cmd, argp, sizeof(struct kvm_sev_cmd)))
		return -EFAULT;

	mutex_lock(&kvm->lock);

	switch (sev_cmd.id) {
	case KVM_SEV_INIT:
		r = sev_guest_init(kvm, &sev_cmd);
		break;
6911 6912 6913
	case KVM_SEV_LAUNCH_START:
		r = sev_launch_start(kvm, &sev_cmd);
		break;
6914 6915 6916
	case KVM_SEV_LAUNCH_UPDATE_DATA:
		r = sev_launch_update_data(kvm, &sev_cmd);
		break;
6917 6918 6919
	case KVM_SEV_LAUNCH_MEASURE:
		r = sev_launch_measure(kvm, &sev_cmd);
		break;
6920 6921 6922
	case KVM_SEV_LAUNCH_FINISH:
		r = sev_launch_finish(kvm, &sev_cmd);
		break;
6923 6924 6925
	case KVM_SEV_GUEST_STATUS:
		r = sev_guest_status(kvm, &sev_cmd);
		break;
6926 6927 6928
	case KVM_SEV_DBG_DECRYPT:
		r = sev_dbg_crypt(kvm, &sev_cmd, true);
		break;
6929 6930 6931
	case KVM_SEV_DBG_ENCRYPT:
		r = sev_dbg_crypt(kvm, &sev_cmd, false);
		break;
6932 6933 6934
	case KVM_SEV_LAUNCH_SECRET:
		r = sev_launch_secret(kvm, &sev_cmd);
		break;
B
Brijesh Singh 已提交
6935 6936 6937 6938 6939 6940 6941 6942 6943 6944 6945 6946 6947
	default:
		r = -EINVAL;
		goto out;
	}

	if (copy_to_user(argp, &sev_cmd, sizeof(struct kvm_sev_cmd)))
		r = -EFAULT;

out:
	mutex_unlock(&kvm->lock);
	return r;
}

6948 6949 6950
static int svm_register_enc_region(struct kvm *kvm,
				   struct kvm_enc_region *range)
{
6951
	struct kvm_sev_info *sev = &to_kvm_svm(kvm)->sev_info;
6952 6953 6954 6955 6956 6957
	struct enc_region *region;
	int ret = 0;

	if (!sev_guest(kvm))
		return -ENOTTY;

6958 6959 6960
	if (range->addr > ULONG_MAX || range->size > ULONG_MAX)
		return -EINVAL;

6961 6962 6963 6964 6965 6966 6967 6968 6969 6970 6971 6972 6973 6974 6975 6976 6977 6978 6979 6980 6981 6982 6983 6984 6985 6986 6987 6988 6989 6990 6991 6992 6993 6994 6995
	region = kzalloc(sizeof(*region), GFP_KERNEL);
	if (!region)
		return -ENOMEM;

	region->pages = sev_pin_memory(kvm, range->addr, range->size, &region->npages, 1);
	if (!region->pages) {
		ret = -ENOMEM;
		goto e_free;
	}

	/*
	 * The guest may change the memory encryption attribute from C=0 -> C=1
	 * or vice versa for this memory range. Lets make sure caches are
	 * flushed to ensure that guest data gets written into memory with
	 * correct C-bit.
	 */
	sev_clflush_pages(region->pages, region->npages);

	region->uaddr = range->addr;
	region->size = range->size;

	mutex_lock(&kvm->lock);
	list_add_tail(&region->list, &sev->regions_list);
	mutex_unlock(&kvm->lock);

	return ret;

e_free:
	kfree(region);
	return ret;
}

static struct enc_region *
find_enc_region(struct kvm *kvm, struct kvm_enc_region *range)
{
6996
	struct kvm_sev_info *sev = &to_kvm_svm(kvm)->sev_info;
6997 6998 6999 7000 7001 7002 7003 7004 7005 7006 7007 7008 7009 7010 7011 7012 7013 7014 7015 7016 7017 7018 7019 7020 7021 7022 7023 7024 7025 7026 7027 7028 7029 7030 7031 7032 7033 7034 7035 7036 7037 7038
	struct list_head *head = &sev->regions_list;
	struct enc_region *i;

	list_for_each_entry(i, head, list) {
		if (i->uaddr == range->addr &&
		    i->size == range->size)
			return i;
	}

	return NULL;
}


static int svm_unregister_enc_region(struct kvm *kvm,
				     struct kvm_enc_region *range)
{
	struct enc_region *region;
	int ret;

	mutex_lock(&kvm->lock);

	if (!sev_guest(kvm)) {
		ret = -ENOTTY;
		goto failed;
	}

	region = find_enc_region(kvm, range);
	if (!region) {
		ret = -EINVAL;
		goto failed;
	}

	__unregister_enc_region_locked(kvm, region);

	mutex_unlock(&kvm->lock);
	return 0;

failed:
	mutex_unlock(&kvm->lock);
	return ret;
}

7039
static struct kvm_x86_ops svm_x86_ops __ro_after_init = {
A
Avi Kivity 已提交
7040 7041 7042 7043
	.cpu_has_kvm_support = has_svm,
	.disabled_by_bios = is_disabled,
	.hardware_setup = svm_hardware_setup,
	.hardware_unsetup = svm_hardware_unsetup,
Y
Yang, Sheng 已提交
7044
	.check_processor_compatibility = svm_check_processor_compat,
A
Avi Kivity 已提交
7045 7046
	.hardware_enable = svm_hardware_enable,
	.hardware_disable = svm_hardware_disable,
7047
	.cpu_has_accelerated_tpr = svm_cpu_has_accelerated_tpr,
7048
	.has_emulated_msr = svm_has_emulated_msr,
A
Avi Kivity 已提交
7049 7050 7051

	.vcpu_create = svm_create_vcpu,
	.vcpu_free = svm_free_vcpu,
7052
	.vcpu_reset = svm_vcpu_reset,
A
Avi Kivity 已提交
7053

7054 7055
	.vm_alloc = svm_vm_alloc,
	.vm_free = svm_vm_free,
7056
	.vm_init = avic_vm_init,
B
Brijesh Singh 已提交
7057
	.vm_destroy = svm_vm_destroy,
7058

7059
	.prepare_guest_switch = svm_prepare_guest_switch,
A
Avi Kivity 已提交
7060 7061
	.vcpu_load = svm_vcpu_load,
	.vcpu_put = svm_vcpu_put,
7062 7063
	.vcpu_blocking = svm_vcpu_blocking,
	.vcpu_unblocking = svm_vcpu_unblocking,
A
Avi Kivity 已提交
7064

7065
	.update_bp_intercept = update_bp_intercept,
7066
	.get_msr_feature = svm_get_msr_feature,
A
Avi Kivity 已提交
7067 7068 7069 7070 7071
	.get_msr = svm_get_msr,
	.set_msr = svm_set_msr,
	.get_segment_base = svm_get_segment_base,
	.get_segment = svm_get_segment,
	.set_segment = svm_set_segment,
7072
	.get_cpl = svm_get_cpl,
7073
	.get_cs_db_l_bits = kvm_get_cs_db_l_bits,
7074
	.decache_cr0_guest_bits = svm_decache_cr0_guest_bits,
7075
	.decache_cr3 = svm_decache_cr3,
7076
	.decache_cr4_guest_bits = svm_decache_cr4_guest_bits,
A
Avi Kivity 已提交
7077 7078 7079 7080 7081 7082 7083 7084
	.set_cr0 = svm_set_cr0,
	.set_cr3 = svm_set_cr3,
	.set_cr4 = svm_set_cr4,
	.set_efer = svm_set_efer,
	.get_idt = svm_get_idt,
	.set_idt = svm_set_idt,
	.get_gdt = svm_get_gdt,
	.set_gdt = svm_set_gdt,
J
Jan Kiszka 已提交
7085 7086
	.get_dr6 = svm_get_dr6,
	.set_dr6 = svm_set_dr6,
7087
	.set_dr7 = svm_set_dr7,
7088
	.sync_dirty_debug_regs = svm_sync_dirty_debug_regs,
A
Avi Kivity 已提交
7089
	.cache_reg = svm_cache_reg,
A
Avi Kivity 已提交
7090 7091
	.get_rflags = svm_get_rflags,
	.set_rflags = svm_set_rflags,
7092

A
Avi Kivity 已提交
7093
	.tlb_flush = svm_flush_tlb,
7094
	.tlb_flush_gva = svm_flush_tlb_gva,
A
Avi Kivity 已提交
7095 7096

	.run = svm_vcpu_run,
7097
	.handle_exit = handle_exit,
A
Avi Kivity 已提交
7098
	.skip_emulated_instruction = skip_emulated_instruction,
7099 7100
	.set_interrupt_shadow = svm_set_interrupt_shadow,
	.get_interrupt_shadow = svm_get_interrupt_shadow,
I
Ingo Molnar 已提交
7101
	.patch_hypercall = svm_patch_hypercall,
E
Eddie Dong 已提交
7102
	.set_irq = svm_set_irq,
7103
	.set_nmi = svm_inject_nmi,
7104
	.queue_exception = svm_queue_exception,
A
Avi Kivity 已提交
7105
	.cancel_injection = svm_cancel_injection,
7106
	.interrupt_allowed = svm_interrupt_allowed,
7107
	.nmi_allowed = svm_nmi_allowed,
J
Jan Kiszka 已提交
7108 7109
	.get_nmi_mask = svm_get_nmi_mask,
	.set_nmi_mask = svm_set_nmi_mask,
7110 7111 7112
	.enable_nmi_window = enable_nmi_window,
	.enable_irq_window = enable_irq_window,
	.update_cr8_intercept = update_cr8_intercept,
7113
	.set_virtual_apic_mode = svm_set_virtual_apic_mode,
7114 7115
	.get_enable_apicv = svm_get_enable_apicv,
	.refresh_apicv_exec_ctrl = svm_refresh_apicv_exec_ctrl,
7116
	.load_eoi_exitmap = svm_load_eoi_exitmap,
7117 7118
	.hwapic_irr_update = svm_hwapic_irr_update,
	.hwapic_isr_update = svm_hwapic_isr_update,
7119
	.sync_pir_to_irr = kvm_lapic_find_highest_irr,
7120
	.apicv_post_state_restore = avic_post_state_restore,
7121 7122

	.set_tss_addr = svm_set_tss_addr,
7123
	.set_identity_map_addr = svm_set_identity_map_addr,
7124
	.get_tdp_level = get_npt_level,
7125
	.get_mt_mask = svm_get_mt_mask,
7126

7127 7128
	.get_exit_info = svm_get_exit_info,

7129
	.get_lpage_level = svm_get_lpage_level,
7130 7131

	.cpuid_update = svm_cpuid_update,
7132 7133

	.rdtscp_supported = svm_rdtscp_supported,
7134
	.invpcid_supported = svm_invpcid_supported,
7135
	.mpx_supported = svm_mpx_supported,
7136
	.xsaves_supported = svm_xsaves_supported,
7137
	.umip_emulated = svm_umip_emulated,
7138 7139

	.set_supported_cpuid = svm_set_supported_cpuid,
7140 7141

	.has_wbinvd_exit = svm_has_wbinvd_exit,
7142

7143
	.read_l1_tsc_offset = svm_read_l1_tsc_offset,
7144
	.write_tsc_offset = svm_write_tsc_offset,
7145 7146

	.set_tdp_cr3 = set_tdp_cr3,
7147 7148

	.check_intercept = svm_check_intercept,
7149
	.handle_external_intr = svm_handle_external_intr,
7150 7151

	.sched_in = svm_sched_in,
7152 7153

	.pmu_ops = &amd_pmu_ops,
7154
	.deliver_posted_interrupt = svm_deliver_avic_intr,
7155
	.update_pi_irte = svm_update_pi_irte,
7156
	.setup_mce = svm_setup_mce,
7157

7158
	.smi_allowed = svm_smi_allowed,
7159 7160
	.pre_enter_smm = svm_pre_enter_smm,
	.pre_leave_smm = svm_pre_leave_smm,
7161
	.enable_smi_window = enable_smi_window,
B
Brijesh Singh 已提交
7162 7163

	.mem_enc_op = svm_mem_enc_op,
7164 7165
	.mem_enc_reg_region = svm_register_enc_region,
	.mem_enc_unreg_region = svm_unregister_enc_region,
A
Avi Kivity 已提交
7166 7167 7168 7169
};

static int __init svm_init(void)
{
7170
	return kvm_init(&svm_x86_ops, sizeof(struct vcpu_svm),
7171
			__alignof__(struct vcpu_svm), THIS_MODULE);
A
Avi Kivity 已提交
7172 7173 7174 7175
}

static void __exit svm_exit(void)
{
7176
	kvm_exit();
A
Avi Kivity 已提交
7177 7178 7179 7180
}

module_init(svm_init)
module_exit(svm_exit)