powerpc.c 56.5 KB
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// SPDX-License-Identifier: GPL-2.0-only
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/*
 *
 * Copyright IBM Corp. 2007
 *
 * Authors: Hollis Blanchard <hollisb@us.ibm.com>
 *          Christian Ehrhardt <ehrhardt@linux.vnet.ibm.com>
 */

#include <linux/errno.h>
#include <linux/err.h>
#include <linux/kvm_host.h>
#include <linux/vmalloc.h>
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#include <linux/hrtimer.h>
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#include <linux/sched/signal.h>
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#include <linux/fs.h>
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#include <linux/slab.h>
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#include <linux/file.h>
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#include <linux/module.h>
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#include <linux/irqbypass.h>
#include <linux/kvm_irqfd.h>
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#include <asm/cputable.h>
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#include <linux/uaccess.h>
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#include <asm/kvm_ppc.h>
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#include <asm/cputhreads.h>
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#include <asm/irqflags.h>
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#include <asm/iommu.h>
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#include <asm/switch_to.h>
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#include <asm/xive.h>
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#ifdef CONFIG_PPC_PSERIES
#include <asm/hvcall.h>
#include <asm/plpar_wrappers.h>
#endif
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#include <asm/ultravisor.h>
#include <asm/kvm_host.h>
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#include "timing.h"
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#include "irq.h"
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#include "../mm/mmu_decl.h"
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#define CREATE_TRACE_POINTS
#include "trace.h"

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struct kvmppc_ops *kvmppc_hv_ops;
EXPORT_SYMBOL_GPL(kvmppc_hv_ops);
struct kvmppc_ops *kvmppc_pr_ops;
EXPORT_SYMBOL_GPL(kvmppc_pr_ops);

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int kvm_arch_vcpu_runnable(struct kvm_vcpu *v)
{
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	return !!(v->arch.pending_exceptions) || kvm_request_pending(v);
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}

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bool kvm_arch_dy_runnable(struct kvm_vcpu *vcpu)
{
	return kvm_arch_vcpu_runnable(vcpu);
}

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bool kvm_arch_vcpu_in_kernel(struct kvm_vcpu *vcpu)
{
	return false;
}

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int kvm_arch_vcpu_should_kick(struct kvm_vcpu *vcpu)
{
	return 1;
}

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/*
 * Common checks before entering the guest world.  Call with interrupts
 * disabled.
 *
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 * returns:
 *
 * == 1 if we're ready to go into guest state
 * <= 0 if we need to go back to the host with return value
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 */
int kvmppc_prepare_to_enter(struct kvm_vcpu *vcpu)
{
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	int r;

	WARN_ON(irqs_disabled());
	hard_irq_disable();
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	while (true) {
		if (need_resched()) {
			local_irq_enable();
			cond_resched();
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			hard_irq_disable();
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			continue;
		}

		if (signal_pending(current)) {
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			kvmppc_account_exit(vcpu, SIGNAL_EXITS);
			vcpu->run->exit_reason = KVM_EXIT_INTR;
			r = -EINTR;
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			break;
		}

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		vcpu->mode = IN_GUEST_MODE;

		/*
		 * Reading vcpu->requests must happen after setting vcpu->mode,
		 * so we don't miss a request because the requester sees
		 * OUTSIDE_GUEST_MODE and assumes we'll be checking requests
		 * before next entering the guest (and thus doesn't IPI).
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		 * This also orders the write to mode from any reads
		 * to the page tables done while the VCPU is running.
		 * Please see the comment in kvm_flush_remote_tlbs.
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		 */
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		smp_mb();
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		if (kvm_request_pending(vcpu)) {
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			/* Make sure we process requests preemptable */
			local_irq_enable();
			trace_kvm_check_requests(vcpu);
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			r = kvmppc_core_check_requests(vcpu);
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			hard_irq_disable();
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			if (r > 0)
				continue;
			break;
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		}

		if (kvmppc_core_prepare_to_enter(vcpu)) {
			/* interrupts got enabled in between, so we
			   are back at square 1 */
			continue;
		}

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		guest_enter_irqoff();
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		return 1;
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	}

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	/* return to host */
	local_irq_enable();
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	return r;
}
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EXPORT_SYMBOL_GPL(kvmppc_prepare_to_enter);
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#if defined(CONFIG_PPC_BOOK3S_64) && defined(CONFIG_KVM_BOOK3S_PR_POSSIBLE)
static void kvmppc_swab_shared(struct kvm_vcpu *vcpu)
{
	struct kvm_vcpu_arch_shared *shared = vcpu->arch.shared;
	int i;

	shared->sprg0 = swab64(shared->sprg0);
	shared->sprg1 = swab64(shared->sprg1);
	shared->sprg2 = swab64(shared->sprg2);
	shared->sprg3 = swab64(shared->sprg3);
	shared->srr0 = swab64(shared->srr0);
	shared->srr1 = swab64(shared->srr1);
	shared->dar = swab64(shared->dar);
	shared->msr = swab64(shared->msr);
	shared->dsisr = swab32(shared->dsisr);
	shared->int_pending = swab32(shared->int_pending);
	for (i = 0; i < ARRAY_SIZE(shared->sr); i++)
		shared->sr[i] = swab32(shared->sr[i]);
}
#endif

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int kvmppc_kvm_pv(struct kvm_vcpu *vcpu)
{
	int nr = kvmppc_get_gpr(vcpu, 11);
	int r;
	unsigned long __maybe_unused param1 = kvmppc_get_gpr(vcpu, 3);
	unsigned long __maybe_unused param2 = kvmppc_get_gpr(vcpu, 4);
	unsigned long __maybe_unused param3 = kvmppc_get_gpr(vcpu, 5);
	unsigned long __maybe_unused param4 = kvmppc_get_gpr(vcpu, 6);
	unsigned long r2 = 0;

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	if (!(kvmppc_get_msr(vcpu) & MSR_SF)) {
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		/* 32 bit mode */
		param1 &= 0xffffffff;
		param2 &= 0xffffffff;
		param3 &= 0xffffffff;
		param4 &= 0xffffffff;
	}

	switch (nr) {
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	case KVM_HCALL_TOKEN(KVM_HC_PPC_MAP_MAGIC_PAGE):
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	{
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#if defined(CONFIG_PPC_BOOK3S_64) && defined(CONFIG_KVM_BOOK3S_PR_POSSIBLE)
		/* Book3S can be little endian, find it out here */
		int shared_big_endian = true;
		if (vcpu->arch.intr_msr & MSR_LE)
			shared_big_endian = false;
		if (shared_big_endian != vcpu->arch.shared_big_endian)
			kvmppc_swab_shared(vcpu);
		vcpu->arch.shared_big_endian = shared_big_endian;
#endif

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		if (!(param2 & MAGIC_PAGE_FLAG_NOT_MAPPED_NX)) {
			/*
			 * Older versions of the Linux magic page code had
			 * a bug where they would map their trampoline code
			 * NX. If that's the case, remove !PR NX capability.
			 */
			vcpu->arch.disable_kernel_nx = true;
			kvm_make_request(KVM_REQ_TLB_FLUSH, vcpu);
		}

		vcpu->arch.magic_page_pa = param1 & ~0xfffULL;
		vcpu->arch.magic_page_ea = param2 & ~0xfffULL;
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#ifdef CONFIG_PPC_64K_PAGES
		/*
		 * Make sure our 4k magic page is in the same window of a 64k
		 * page within the guest and within the host's page.
		 */
		if ((vcpu->arch.magic_page_pa & 0xf000) !=
		    ((ulong)vcpu->arch.shared & 0xf000)) {
			void *old_shared = vcpu->arch.shared;
			ulong shared = (ulong)vcpu->arch.shared;
			void *new_shared;

			shared &= PAGE_MASK;
			shared |= vcpu->arch.magic_page_pa & 0xf000;
			new_shared = (void*)shared;
			memcpy(new_shared, old_shared, 0x1000);
			vcpu->arch.shared = new_shared;
		}
#endif

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		r2 = KVM_MAGIC_FEAT_SR | KVM_MAGIC_FEAT_MAS0_TO_SPRG7;
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		r = EV_SUCCESS;
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		break;
	}
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	case KVM_HCALL_TOKEN(KVM_HC_FEATURES):
		r = EV_SUCCESS;
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#if defined(CONFIG_PPC_BOOK3S) || defined(CONFIG_KVM_E500V2)
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		r2 |= (1 << KVM_FEATURE_MAGIC_PAGE);
#endif
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		/* Second return value is in r4 */
		break;
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	case EV_HCALL_TOKEN(EV_IDLE):
		r = EV_SUCCESS;
		kvm_vcpu_block(vcpu);
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		kvm_clear_request(KVM_REQ_UNHALT, vcpu);
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		break;
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	default:
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		r = EV_UNIMPLEMENTED;
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		break;
	}

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	kvmppc_set_gpr(vcpu, 4, r2);

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	return r;
}
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EXPORT_SYMBOL_GPL(kvmppc_kvm_pv);
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int kvmppc_sanity_check(struct kvm_vcpu *vcpu)
{
	int r = false;

	/* We have to know what CPU to virtualize */
	if (!vcpu->arch.pvr)
		goto out;

	/* PAPR only works with book3s_64 */
	if ((vcpu->arch.cpu_type != KVM_CPU_3S_64) && vcpu->arch.papr_enabled)
		goto out;

	/* HV KVM can only do PAPR mode for now */
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	if (!vcpu->arch.papr_enabled && is_kvmppc_hv_enabled(vcpu->kvm))
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		goto out;

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#ifdef CONFIG_KVM_BOOKE_HV
	if (!cpu_has_feature(CPU_FTR_EMB_HV))
		goto out;
#endif

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	r = true;

out:
	vcpu->arch.sane = r;
	return r ? 0 : -EINVAL;
}
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EXPORT_SYMBOL_GPL(kvmppc_sanity_check);
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int kvmppc_emulate_mmio(struct kvm_run *run, struct kvm_vcpu *vcpu)
{
	enum emulation_result er;
	int r;

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	er = kvmppc_emulate_loadstore(vcpu);
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	switch (er) {
	case EMULATE_DONE:
		/* Future optimization: only reload non-volatiles if they were
		 * actually modified. */
		r = RESUME_GUEST_NV;
		break;
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	case EMULATE_AGAIN:
		r = RESUME_GUEST;
		break;
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	case EMULATE_DO_MMIO:
		run->exit_reason = KVM_EXIT_MMIO;
		/* We must reload nonvolatiles because "update" load/store
		 * instructions modify register state. */
		/* Future optimization: only reload non-volatiles if they were
		 * actually modified. */
		r = RESUME_HOST_NV;
		break;
	case EMULATE_FAIL:
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	{
		u32 last_inst;

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		kvmppc_get_last_inst(vcpu, INST_GENERIC, &last_inst);
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		/* XXX Deliver Program interrupt to guest. */
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		pr_emerg("%s: emulation failed (%08x)\n", __func__, last_inst);
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		r = RESUME_HOST;
		break;
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	}
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	default:
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		WARN_ON(1);
		r = RESUME_GUEST;
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	}

	return r;
}
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EXPORT_SYMBOL_GPL(kvmppc_emulate_mmio);
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int kvmppc_st(struct kvm_vcpu *vcpu, ulong *eaddr, int size, void *ptr,
	      bool data)
{
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	ulong mp_pa = vcpu->arch.magic_page_pa & KVM_PAM & PAGE_MASK;
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	struct kvmppc_pte pte;
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	int r = -EINVAL;
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	vcpu->stat.st++;

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	if (vcpu->kvm->arch.kvm_ops && vcpu->kvm->arch.kvm_ops->store_to_eaddr)
		r = vcpu->kvm->arch.kvm_ops->store_to_eaddr(vcpu, eaddr, ptr,
							    size);

	if ((!r) || (r == -EAGAIN))
		return r;

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	r = kvmppc_xlate(vcpu, *eaddr, data ? XLATE_DATA : XLATE_INST,
			 XLATE_WRITE, &pte);
	if (r < 0)
		return r;

	*eaddr = pte.raddr;

	if (!pte.may_write)
		return -EPERM;

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	/* Magic page override */
	if (kvmppc_supports_magic_page(vcpu) && mp_pa &&
	    ((pte.raddr & KVM_PAM & PAGE_MASK) == mp_pa) &&
	    !(kvmppc_get_msr(vcpu) & MSR_PR)) {
		void *magic = vcpu->arch.shared;
		magic += pte.eaddr & 0xfff;
		memcpy(magic, ptr, size);
		return EMULATE_DONE;
	}

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	if (kvm_write_guest(vcpu->kvm, pte.raddr, ptr, size))
		return EMULATE_DO_MMIO;

	return EMULATE_DONE;
}
EXPORT_SYMBOL_GPL(kvmppc_st);

int kvmppc_ld(struct kvm_vcpu *vcpu, ulong *eaddr, int size, void *ptr,
		      bool data)
{
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	ulong mp_pa = vcpu->arch.magic_page_pa & KVM_PAM & PAGE_MASK;
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	struct kvmppc_pte pte;
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	int rc = -EINVAL;
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	vcpu->stat.ld++;

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	if (vcpu->kvm->arch.kvm_ops && vcpu->kvm->arch.kvm_ops->load_from_eaddr)
		rc = vcpu->kvm->arch.kvm_ops->load_from_eaddr(vcpu, eaddr, ptr,
							      size);

	if ((!rc) || (rc == -EAGAIN))
		return rc;

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	rc = kvmppc_xlate(vcpu, *eaddr, data ? XLATE_DATA : XLATE_INST,
			  XLATE_READ, &pte);
	if (rc)
		return rc;

	*eaddr = pte.raddr;

	if (!pte.may_read)
		return -EPERM;

	if (!data && !pte.may_execute)
		return -ENOEXEC;

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	/* Magic page override */
	if (kvmppc_supports_magic_page(vcpu) && mp_pa &&
	    ((pte.raddr & KVM_PAM & PAGE_MASK) == mp_pa) &&
	    !(kvmppc_get_msr(vcpu) & MSR_PR)) {
		void *magic = vcpu->arch.shared;
		magic += pte.eaddr & 0xfff;
		memcpy(ptr, magic, size);
		return EMULATE_DONE;
	}

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	if (kvm_read_guest(vcpu->kvm, pte.raddr, ptr, size))
		return EMULATE_DO_MMIO;
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	return EMULATE_DONE;
}
EXPORT_SYMBOL_GPL(kvmppc_ld);

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int kvm_arch_hardware_enable(void)
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{
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	return 0;
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}

int kvm_arch_hardware_setup(void)
{
	return 0;
}

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int kvm_arch_check_processor_compat(void)
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{
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	return kvmppc_core_check_processor_compat();
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}

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int kvm_arch_init_vm(struct kvm *kvm, unsigned long type)
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{
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	struct kvmppc_ops *kvm_ops = NULL;
	/*
	 * if we have both HV and PR enabled, default is HV
	 */
	if (type == 0) {
		if (kvmppc_hv_ops)
			kvm_ops = kvmppc_hv_ops;
		else
			kvm_ops = kvmppc_pr_ops;
		if (!kvm_ops)
			goto err_out;
	} else	if (type == KVM_VM_PPC_HV) {
		if (!kvmppc_hv_ops)
			goto err_out;
		kvm_ops = kvmppc_hv_ops;
	} else if (type == KVM_VM_PPC_PR) {
		if (!kvmppc_pr_ops)
			goto err_out;
		kvm_ops = kvmppc_pr_ops;
	} else
		goto err_out;

	if (kvm_ops->owner && !try_module_get(kvm_ops->owner))
		return -ENOENT;

	kvm->arch.kvm_ops = kvm_ops;
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	return kvmppc_core_init_vm(kvm);
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err_out:
	return -EINVAL;
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}

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void kvm_arch_destroy_vm(struct kvm *kvm)
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{
	unsigned int i;
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	struct kvm_vcpu *vcpu;
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#ifdef CONFIG_KVM_XICS
	/*
	 * We call kick_all_cpus_sync() to ensure that all
	 * CPUs have executed any pending IPIs before we
	 * continue and free VCPUs structures below.
	 */
	if (is_kvmppc_hv_enabled(kvm))
		kick_all_cpus_sync();
#endif

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	kvm_for_each_vcpu(i, vcpu, kvm)
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		kvm_arch_vcpu_destroy(vcpu);
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	mutex_lock(&kvm->lock);
	for (i = 0; i < atomic_read(&kvm->online_vcpus); i++)
		kvm->vcpus[i] = NULL;

	atomic_set(&kvm->online_vcpus, 0);
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	kvmppc_core_destroy_vm(kvm);

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	mutex_unlock(&kvm->lock);
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	/* drop the module reference */
	module_put(kvm->arch.kvm_ops->owner);
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}

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int kvm_vm_ioctl_check_extension(struct kvm *kvm, long ext)
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{
	int r;
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	/* Assume we're using HV mode when the HV module is loaded */
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	int hv_enabled = kvmppc_hv_ops ? 1 : 0;
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	if (kvm) {
		/*
		 * Hooray - we know which VM type we're running on. Depend on
		 * that rather than the guess above.
		 */
		hv_enabled = is_kvmppc_hv_enabled(kvm);
	}

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	switch (ext) {
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#ifdef CONFIG_BOOKE
	case KVM_CAP_PPC_BOOKE_SREGS:
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	case KVM_CAP_PPC_BOOKE_WATCHDOG:
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	case KVM_CAP_PPC_EPR:
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#else
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	case KVM_CAP_PPC_SEGSTATE:
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	case KVM_CAP_PPC_HIOR:
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	case KVM_CAP_PPC_PAPR:
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#endif
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	case KVM_CAP_PPC_UNSET_IRQ:
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	case KVM_CAP_PPC_IRQ_LEVEL:
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	case KVM_CAP_ENABLE_CAP:
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	case KVM_CAP_ONE_REG:
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	case KVM_CAP_IOEVENTFD:
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	case KVM_CAP_DEVICE_CTRL:
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	case KVM_CAP_IMMEDIATE_EXIT:
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		r = 1;
		break;
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	case KVM_CAP_PPC_GUEST_DEBUG_SSTEP:
		/* fall through */
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	case KVM_CAP_PPC_PAIRED_SINGLES:
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	case KVM_CAP_PPC_OSI:
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	case KVM_CAP_PPC_GET_PVINFO:
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#if defined(CONFIG_KVM_E500V2) || defined(CONFIG_KVM_E500MC)
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	case KVM_CAP_SW_TLB:
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#endif
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		/* We support this only for PR */
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		r = !hv_enabled;
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		break;
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#ifdef CONFIG_KVM_MPIC
	case KVM_CAP_IRQ_MPIC:
		r = 1;
		break;
#endif

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#ifdef CONFIG_PPC_BOOK3S_64
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	case KVM_CAP_SPAPR_TCE:
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	case KVM_CAP_SPAPR_TCE_64:
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		r = 1;
		break;
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	case KVM_CAP_SPAPR_TCE_VFIO:
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		r = !!cpu_has_feature(CPU_FTR_HVMODE);
		break;
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	case KVM_CAP_PPC_RTAS:
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	case KVM_CAP_PPC_FIXUP_HCALL:
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	case KVM_CAP_PPC_ENABLE_HCALL:
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#ifdef CONFIG_KVM_XICS
	case KVM_CAP_IRQ_XICS:
#endif
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	case KVM_CAP_PPC_GET_CPU_CHAR:
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		r = 1;
		break;
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#ifdef CONFIG_KVM_XIVE
	case KVM_CAP_PPC_IRQ_XIVE:
		/*
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		 * We need XIVE to be enabled on the platform (implies
		 * a POWER9 processor) and the PowerNV platform, as
		 * nested is not yet supported.
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		 */
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		r = xive_enabled() && !!cpu_has_feature(CPU_FTR_HVMODE) &&
			kvmppc_xive_native_supported();
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		break;
#endif
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	case KVM_CAP_PPC_ALLOC_HTAB:
		r = hv_enabled;
		break;
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#endif /* CONFIG_PPC_BOOK3S_64 */
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#ifdef CONFIG_KVM_BOOK3S_HV_POSSIBLE
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	case KVM_CAP_PPC_SMT:
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		r = 0;
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		if (kvm) {
			if (kvm->arch.emul_smt_mode > 1)
				r = kvm->arch.emul_smt_mode;
			else
				r = kvm->arch.smt_mode;
		} else if (hv_enabled) {
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			if (cpu_has_feature(CPU_FTR_ARCH_300))
				r = 1;
			else
				r = threads_per_subcore;
		}
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		break;
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	case KVM_CAP_PPC_SMT_POSSIBLE:
		r = 1;
		if (hv_enabled) {
			if (!cpu_has_feature(CPU_FTR_ARCH_300))
				r = ((threads_per_subcore << 1) - 1);
			else
				/* P9 can emulate dbells, so allow any mode */
				r = 8 | 4 | 2 | 1;
		}
		break;
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	case KVM_CAP_PPC_RMA:
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		r = 0;
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		break;
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	case KVM_CAP_PPC_HWRNG:
		r = kvmppc_hwrng_present();
		break;
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	case KVM_CAP_PPC_MMU_RADIX:
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		r = !!(hv_enabled && radix_enabled());
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		break;
	case KVM_CAP_PPC_MMU_HASH_V3:
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		r = !!(hv_enabled && cpu_has_feature(CPU_FTR_ARCH_300) &&
		       cpu_has_feature(CPU_FTR_HVMODE));
614
		break;
615 616 617 618
	case KVM_CAP_PPC_NESTED_HV:
		r = !!(hv_enabled && kvmppc_hv_ops->enable_nested &&
		       !kvmppc_hv_ops->enable_nested(NULL));
		break;
619
#endif
620
	case KVM_CAP_SYNC_MMU:
621
#ifdef CONFIG_KVM_BOOK3S_HV_POSSIBLE
622
		r = hv_enabled;
623 624 625 626
#elif defined(KVM_ARCH_WANT_MMU_NOTIFIER)
		r = 1;
#else
		r = 0;
627
#endif
628 629
		break;
#ifdef CONFIG_KVM_BOOK3S_HV_POSSIBLE
630
	case KVM_CAP_PPC_HTAB_FD:
631
		r = hv_enabled;
632
		break;
633
#endif
634 635 636 637 638 639 640
	case KVM_CAP_NR_VCPUS:
		/*
		 * Recommending a number of CPUs is somewhat arbitrary; we
		 * return the number of present CPUs for -HV (since a host
		 * will have secondary threads "offline"), and for other KVM
		 * implementations just count online CPUs.
		 */
641
		if (hv_enabled)
642 643 644
			r = num_present_cpus();
		else
			r = num_online_cpus();
645 646 647 648
		break;
	case KVM_CAP_MAX_VCPUS:
		r = KVM_MAX_VCPUS;
		break;
649 650 651
	case KVM_CAP_MAX_VCPU_ID:
		r = KVM_MAX_VCPU_ID;
		break;
652 653 654 655
#ifdef CONFIG_PPC_BOOK3S_64
	case KVM_CAP_PPC_GET_SMMU_INFO:
		r = 1;
		break;
656 657 658
	case KVM_CAP_SPAPR_MULTITCE:
		r = 1;
		break;
659
	case KVM_CAP_SPAPR_RESIZE_HPT:
660
		r = !!hv_enabled;
661
		break;
662 663 664 665 666
#endif
#ifdef CONFIG_KVM_BOOK3S_HV_POSSIBLE
	case KVM_CAP_PPC_FWNMI:
		r = hv_enabled;
		break;
667
#endif
668
#ifdef CONFIG_PPC_TRANSACTIONAL_MEM
669
	case KVM_CAP_PPC_HTM:
670 671
		r = !!(cur_cpu_spec->cpu_user_features2 & PPC_FEATURE2_HTM) ||
		     (hv_enabled && cpu_has_feature(CPU_FTR_P9_TM_HV_ASSIST));
672
		break;
673
#endif
674 675 676 677 678 679 680 681 682 683 684 685 686 687
	default:
		r = 0;
		break;
	}
	return r;

}

long kvm_arch_dev_ioctl(struct file *filp,
                        unsigned int ioctl, unsigned long arg)
{
	return -EINVAL;
}

688
void kvm_arch_free_memslot(struct kvm *kvm, struct kvm_memory_slot *free,
689 690
			   struct kvm_memory_slot *dont)
{
691
	kvmppc_core_free_memslot(kvm, free, dont);
692 693
}

694 695
int kvm_arch_create_memslot(struct kvm *kvm, struct kvm_memory_slot *slot,
			    unsigned long npages)
696
{
697
	return kvmppc_core_create_memslot(kvm, slot, npages);
698 699
}

700
int kvm_arch_prepare_memory_region(struct kvm *kvm,
701
				   struct kvm_memory_slot *memslot,
702
				   const struct kvm_userspace_memory_region *mem,
703
				   enum kvm_mr_change change)
704
{
705
	return kvmppc_core_prepare_memory_region(kvm, memslot, mem);
706 707
}

708
void kvm_arch_commit_memory_region(struct kvm *kvm,
709
				   const struct kvm_userspace_memory_region *mem,
710
				   const struct kvm_memory_slot *old,
711
				   const struct kvm_memory_slot *new,
712
				   enum kvm_mr_change change)
713
{
714
	kvmppc_core_commit_memory_region(kvm, mem, old, new, change);
715 716
}

717 718
void kvm_arch_flush_shadow_memslot(struct kvm *kvm,
				   struct kvm_memory_slot *slot)
719
{
720
	kvmppc_core_flush_memslot(kvm, slot);
721 722
}

723 724 725 726 727
int kvm_arch_vcpu_precreate(struct kvm *kvm, unsigned int id)
{
	return 0;
}

728 729
struct kvm_vcpu *kvm_arch_vcpu_create(struct kvm *kvm, unsigned int id)
{
730
	struct kvm_vcpu *vcpu;
731 732 733 734 735 736
	int err;

	vcpu = kmem_cache_zalloc(kvm_vcpu_cache, GFP_KERNEL);
	if (!vcpu)
		return ERR_PTR(-ENOMEM);

737
	err = kvm_vcpu_init(vcpu, kvm, id);
738 739 740
	if (err)
		goto free_vcpu;

741 742 743 744
	err = kvmppc_core_vcpu_create(vcpu);
	if (err)
		goto uninit_vcpu;

745 746
	vcpu->arch.wqp = &vcpu->wq;
	kvmppc_create_vcpu_debugfs(vcpu, id);
747
	return vcpu;
748

749 750
uninit_vcpu:
	kvm_vcpu_uninit(vcpu);
751 752 753
free_vcpu:
	kmem_cache_free(kvm_vcpu_cache, vcpu);
	return ERR_PTR(err);
754 755
}

756
void kvm_arch_vcpu_postcreate(struct kvm_vcpu *vcpu)
757 758 759
{
}

760
void kvm_arch_vcpu_destroy(struct kvm_vcpu *vcpu)
761
{
762 763 764
	/* Make sure we're not using the vcpu anymore */
	hrtimer_cancel(&vcpu->arch.dec_timer);

765
	kvmppc_remove_vcpu_debugfs(vcpu);
S
Scott Wood 已提交
766 767 768 769 770

	switch (vcpu->arch.irq_type) {
	case KVMPPC_IRQ_MPIC:
		kvmppc_mpic_disconnect_vcpu(vcpu->arch.mpic, vcpu);
		break;
771
	case KVMPPC_IRQ_XICS:
772
		if (xics_on_xive())
773 774 775
			kvmppc_xive_cleanup_vcpu(vcpu);
		else
			kvmppc_xics_free_icp(vcpu);
776
		break;
777 778 779
	case KVMPPC_IRQ_XIVE:
		kvmppc_xive_native_cleanup_vcpu(vcpu);
		break;
S
Scott Wood 已提交
780 781
	}

782
	kvmppc_core_vcpu_free(vcpu);
783

784 785
	kvm_vcpu_uninit(vcpu);

786
	kmem_cache_free(kvm_vcpu_cache, vcpu);
787 788 789 790
}

int kvm_cpu_has_pending_timer(struct kvm_vcpu *vcpu)
{
791
	return kvmppc_core_pending_dec(vcpu);
792 793
}

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Thomas Huth 已提交
794
static enum hrtimer_restart kvmppc_decrementer_wakeup(struct hrtimer *timer)
A
Alexander Graf 已提交
795 796 797 798
{
	struct kvm_vcpu *vcpu;

	vcpu = container_of(timer, struct kvm_vcpu, arch.dec_timer);
799
	kvmppc_decrementer_func(vcpu);
A
Alexander Graf 已提交
800 801 802 803

	return HRTIMER_NORESTART;
}

804 805
int kvm_arch_vcpu_init(struct kvm_vcpu *vcpu)
{
806 807
	int ret;

A
Alexander Graf 已提交
808 809
	hrtimer_init(&vcpu->arch.dec_timer, CLOCK_REALTIME, HRTIMER_MODE_ABS);
	vcpu->arch.dec_timer.function = kvmppc_decrementer_wakeup;
810
	vcpu->arch.dec_expires = get_tb();
811

812 813 814
#ifdef CONFIG_KVM_EXIT_TIMING
	mutex_init(&vcpu->arch.exit_timing_lock);
#endif
815 816
	ret = kvmppc_subarch_vcpu_init(vcpu);
	return ret;
817 818 819 820
}

void kvm_arch_vcpu_uninit(struct kvm_vcpu *vcpu)
{
821
	kvmppc_mmu_destroy(vcpu);
822
	kvmppc_subarch_vcpu_uninit(vcpu);
823 824 825 826
}

void kvm_arch_vcpu_load(struct kvm_vcpu *vcpu, int cpu)
{
827 828 829 830 831 832 833 834 835 836
#ifdef CONFIG_BOOKE
	/*
	 * vrsave (formerly usprg0) isn't used by Linux, but may
	 * be used by the guest.
	 *
	 * On non-booke this is associated with Altivec and
	 * is handled by code in book3s.c.
	 */
	mtspr(SPRN_VRSAVE, vcpu->arch.vrsave);
#endif
837
	kvmppc_core_vcpu_load(vcpu, cpu);
838 839 840 841
}

void kvm_arch_vcpu_put(struct kvm_vcpu *vcpu)
{
842
	kvmppc_core_vcpu_put(vcpu);
843 844 845
#ifdef CONFIG_BOOKE
	vcpu->arch.vrsave = mfspr(SPRN_VRSAVE);
#endif
846 847
}

848 849 850 851 852 853 854 855 856 857 858 859 860 861 862 863 864 865 866 867 868 869 870 871 872 873 874 875 876 877 878 879 880 881 882 883
/*
 * irq_bypass_add_producer and irq_bypass_del_producer are only
 * useful if the architecture supports PCI passthrough.
 * irq_bypass_stop and irq_bypass_start are not needed and so
 * kvm_ops are not defined for them.
 */
bool kvm_arch_has_irq_bypass(void)
{
	return ((kvmppc_hv_ops && kvmppc_hv_ops->irq_bypass_add_producer) ||
		(kvmppc_pr_ops && kvmppc_pr_ops->irq_bypass_add_producer));
}

int kvm_arch_irq_bypass_add_producer(struct irq_bypass_consumer *cons,
				     struct irq_bypass_producer *prod)
{
	struct kvm_kernel_irqfd *irqfd =
		container_of(cons, struct kvm_kernel_irqfd, consumer);
	struct kvm *kvm = irqfd->kvm;

	if (kvm->arch.kvm_ops->irq_bypass_add_producer)
		return kvm->arch.kvm_ops->irq_bypass_add_producer(cons, prod);

	return 0;
}

void kvm_arch_irq_bypass_del_producer(struct irq_bypass_consumer *cons,
				      struct irq_bypass_producer *prod)
{
	struct kvm_kernel_irqfd *irqfd =
		container_of(cons, struct kvm_kernel_irqfd, consumer);
	struct kvm *kvm = irqfd->kvm;

	if (kvm->arch.kvm_ops->irq_bypass_del_producer)
		kvm->arch.kvm_ops->irq_bypass_del_producer(cons, prod);
}

884 885 886 887 888 889 890 891 892 893 894 895 896 897 898 899 900 901 902 903 904 905 906 907 908 909 910 911 912 913 914 915 916 917 918 919 920 921 922 923 924 925
#ifdef CONFIG_VSX
static inline int kvmppc_get_vsr_dword_offset(int index)
{
	int offset;

	if ((index != 0) && (index != 1))
		return -1;

#ifdef __BIG_ENDIAN
	offset =  index;
#else
	offset = 1 - index;
#endif

	return offset;
}

static inline int kvmppc_get_vsr_word_offset(int index)
{
	int offset;

	if ((index > 3) || (index < 0))
		return -1;

#ifdef __BIG_ENDIAN
	offset = index;
#else
	offset = 3 - index;
#endif
	return offset;
}

static inline void kvmppc_set_vsr_dword(struct kvm_vcpu *vcpu,
	u64 gpr)
{
	union kvmppc_one_reg val;
	int offset = kvmppc_get_vsr_dword_offset(vcpu->arch.mmio_vsx_offset);
	int index = vcpu->arch.io_gpr & KVM_MMIO_REG_MASK;

	if (offset == -1)
		return;

926 927
	if (index >= 32) {
		val.vval = VCPU_VSX_VR(vcpu, index - 32);
928
		val.vsxval[offset] = gpr;
929
		VCPU_VSX_VR(vcpu, index - 32) = val.vval;
930 931 932 933 934 935 936 937 938 939 940
	} else {
		VCPU_VSX_FPR(vcpu, index, offset) = gpr;
	}
}

static inline void kvmppc_set_vsr_dword_dump(struct kvm_vcpu *vcpu,
	u64 gpr)
{
	union kvmppc_one_reg val;
	int index = vcpu->arch.io_gpr & KVM_MMIO_REG_MASK;

941 942
	if (index >= 32) {
		val.vval = VCPU_VSX_VR(vcpu, index - 32);
943 944
		val.vsxval[0] = gpr;
		val.vsxval[1] = gpr;
945
		VCPU_VSX_VR(vcpu, index - 32) = val.vval;
946 947 948 949 950 951
	} else {
		VCPU_VSX_FPR(vcpu, index, 0) = gpr;
		VCPU_VSX_FPR(vcpu, index, 1) = gpr;
	}
}

952 953 954 955 956 957
static inline void kvmppc_set_vsr_word_dump(struct kvm_vcpu *vcpu,
	u32 gpr)
{
	union kvmppc_one_reg val;
	int index = vcpu->arch.io_gpr & KVM_MMIO_REG_MASK;

958
	if (index >= 32) {
959 960 961 962
		val.vsx32val[0] = gpr;
		val.vsx32val[1] = gpr;
		val.vsx32val[2] = gpr;
		val.vsx32val[3] = gpr;
963
		VCPU_VSX_VR(vcpu, index - 32) = val.vval;
964 965 966 967 968 969 970 971
	} else {
		val.vsx32val[0] = gpr;
		val.vsx32val[1] = gpr;
		VCPU_VSX_FPR(vcpu, index, 0) = val.vsxval[0];
		VCPU_VSX_FPR(vcpu, index, 1) = val.vsxval[0];
	}
}

972 973 974 975 976 977 978 979 980 981 982
static inline void kvmppc_set_vsr_word(struct kvm_vcpu *vcpu,
	u32 gpr32)
{
	union kvmppc_one_reg val;
	int offset = kvmppc_get_vsr_word_offset(vcpu->arch.mmio_vsx_offset);
	int index = vcpu->arch.io_gpr & KVM_MMIO_REG_MASK;
	int dword_offset, word_offset;

	if (offset == -1)
		return;

983 984
	if (index >= 32) {
		val.vval = VCPU_VSX_VR(vcpu, index - 32);
985
		val.vsx32val[offset] = gpr32;
986
		VCPU_VSX_VR(vcpu, index - 32) = val.vval;
987 988 989 990 991 992 993 994 995 996
	} else {
		dword_offset = offset / 2;
		word_offset = offset % 2;
		val.vsxval[0] = VCPU_VSX_FPR(vcpu, index, dword_offset);
		val.vsx32val[word_offset] = gpr32;
		VCPU_VSX_FPR(vcpu, index, dword_offset) = val.vsxval[0];
	}
}
#endif /* CONFIG_VSX */

997
#ifdef CONFIG_ALTIVEC
998 999 1000 1001 1002 1003 1004 1005 1006 1007 1008 1009 1010 1011 1012 1013 1014 1015 1016 1017 1018 1019 1020 1021 1022 1023 1024 1025 1026 1027 1028 1029 1030 1031 1032 1033 1034 1035 1036 1037 1038 1039
static inline int kvmppc_get_vmx_offset_generic(struct kvm_vcpu *vcpu,
		int index, int element_size)
{
	int offset;
	int elts = sizeof(vector128)/element_size;

	if ((index < 0) || (index >= elts))
		return -1;

	if (kvmppc_need_byteswap(vcpu))
		offset = elts - index - 1;
	else
		offset = index;

	return offset;
}

static inline int kvmppc_get_vmx_dword_offset(struct kvm_vcpu *vcpu,
		int index)
{
	return kvmppc_get_vmx_offset_generic(vcpu, index, 8);
}

static inline int kvmppc_get_vmx_word_offset(struct kvm_vcpu *vcpu,
		int index)
{
	return kvmppc_get_vmx_offset_generic(vcpu, index, 4);
}

static inline int kvmppc_get_vmx_hword_offset(struct kvm_vcpu *vcpu,
		int index)
{
	return kvmppc_get_vmx_offset_generic(vcpu, index, 2);
}

static inline int kvmppc_get_vmx_byte_offset(struct kvm_vcpu *vcpu,
		int index)
{
	return kvmppc_get_vmx_offset_generic(vcpu, index, 1);
}


1040
static inline void kvmppc_set_vmx_dword(struct kvm_vcpu *vcpu,
1041
	u64 gpr)
1042
{
1043 1044 1045
	union kvmppc_one_reg val;
	int offset = kvmppc_get_vmx_dword_offset(vcpu,
			vcpu->arch.mmio_vmx_offset);
1046 1047
	int index = vcpu->arch.io_gpr & KVM_MMIO_REG_MASK;

1048 1049 1050 1051 1052 1053 1054 1055 1056 1057 1058 1059 1060 1061 1062
	if (offset == -1)
		return;

	val.vval = VCPU_VSX_VR(vcpu, index);
	val.vsxval[offset] = gpr;
	VCPU_VSX_VR(vcpu, index) = val.vval;
}

static inline void kvmppc_set_vmx_word(struct kvm_vcpu *vcpu,
	u32 gpr32)
{
	union kvmppc_one_reg val;
	int offset = kvmppc_get_vmx_word_offset(vcpu,
			vcpu->arch.mmio_vmx_offset);
	int index = vcpu->arch.io_gpr & KVM_MMIO_REG_MASK;
1063

1064
	if (offset == -1)
1065 1066
		return;

1067 1068 1069 1070
	val.vval = VCPU_VSX_VR(vcpu, index);
	val.vsx32val[offset] = gpr32;
	VCPU_VSX_VR(vcpu, index) = val.vval;
}
1071

1072 1073 1074 1075 1076 1077 1078 1079 1080
static inline void kvmppc_set_vmx_hword(struct kvm_vcpu *vcpu,
	u16 gpr16)
{
	union kvmppc_one_reg val;
	int offset = kvmppc_get_vmx_hword_offset(vcpu,
			vcpu->arch.mmio_vmx_offset);
	int index = vcpu->arch.io_gpr & KVM_MMIO_REG_MASK;

	if (offset == -1)
1081 1082
		return;

1083 1084 1085 1086 1087 1088 1089 1090 1091 1092 1093 1094
	val.vval = VCPU_VSX_VR(vcpu, index);
	val.vsx16val[offset] = gpr16;
	VCPU_VSX_VR(vcpu, index) = val.vval;
}

static inline void kvmppc_set_vmx_byte(struct kvm_vcpu *vcpu,
	u8 gpr8)
{
	union kvmppc_one_reg val;
	int offset = kvmppc_get_vmx_byte_offset(vcpu,
			vcpu->arch.mmio_vmx_offset);
	int index = vcpu->arch.io_gpr & KVM_MMIO_REG_MASK;
1095

1096 1097
	if (offset == -1)
		return;
1098

1099 1100 1101
	val.vval = VCPU_VSX_VR(vcpu, index);
	val.vsx8val[offset] = gpr8;
	VCPU_VSX_VR(vcpu, index) = val.vval;
1102 1103 1104
}
#endif /* CONFIG_ALTIVEC */

1105 1106 1107 1108 1109 1110 1111 1112 1113 1114 1115 1116 1117 1118 1119 1120 1121 1122 1123 1124 1125 1126 1127 1128 1129 1130 1131 1132 1133 1134
#ifdef CONFIG_PPC_FPU
static inline u64 sp_to_dp(u32 fprs)
{
	u64 fprd;

	preempt_disable();
	enable_kernel_fp();
	asm ("lfs%U1%X1 0,%1; stfd%U0%X0 0,%0" : "=m" (fprd) : "m" (fprs)
	     : "fr0");
	preempt_enable();
	return fprd;
}

static inline u32 dp_to_sp(u64 fprd)
{
	u32 fprs;

	preempt_disable();
	enable_kernel_fp();
	asm ("lfd%U1%X1 0,%1; stfs%U0%X0 0,%0" : "=m" (fprs) : "m" (fprd)
	     : "fr0");
	preempt_enable();
	return fprs;
}

#else
#define sp_to_dp(x)	(x)
#define dp_to_sp(x)	(x)
#endif /* CONFIG_PPC_FPU */

1135 1136 1137
static void kvmppc_complete_mmio_load(struct kvm_vcpu *vcpu,
                                      struct kvm_run *run)
{
1138
	u64 uninitialized_var(gpr);
1139

1140
	if (run->mmio.len > sizeof(gpr)) {
1141 1142 1143 1144
		printk(KERN_ERR "bad MMIO length: %d\n", run->mmio.len);
		return;
	}

1145
	if (!vcpu->arch.mmio_host_swabbed) {
1146
		switch (run->mmio.len) {
1147
		case 8: gpr = *(u64 *)run->mmio.data; break;
1148 1149 1150
		case 4: gpr = *(u32 *)run->mmio.data; break;
		case 2: gpr = *(u16 *)run->mmio.data; break;
		case 1: gpr = *(u8 *)run->mmio.data; break;
1151 1152 1153
		}
	} else {
		switch (run->mmio.len) {
1154 1155 1156
		case 8: gpr = swab64(*(u64 *)run->mmio.data); break;
		case 4: gpr = swab32(*(u32 *)run->mmio.data); break;
		case 2: gpr = swab16(*(u16 *)run->mmio.data); break;
1157
		case 1: gpr = *(u8 *)run->mmio.data; break;
1158 1159
		}
	}
1160

1161 1162 1163 1164
	/* conversion between single and double precision */
	if ((vcpu->arch.mmio_sp64_extend) && (run->mmio.len == 4))
		gpr = sp_to_dp(gpr);

A
Alexander Graf 已提交
1165 1166 1167 1168 1169 1170 1171 1172 1173 1174 1175 1176 1177 1178 1179 1180
	if (vcpu->arch.mmio_sign_extend) {
		switch (run->mmio.len) {
#ifdef CONFIG_PPC64
		case 4:
			gpr = (s64)(s32)gpr;
			break;
#endif
		case 2:
			gpr = (s64)(s16)gpr;
			break;
		case 1:
			gpr = (s64)(s8)gpr;
			break;
		}
	}

1181 1182
	switch (vcpu->arch.io_gpr & KVM_MMIO_REG_EXT_MASK) {
	case KVM_MMIO_REG_GPR:
1183 1184
		kvmppc_set_gpr(vcpu, vcpu->arch.io_gpr, gpr);
		break;
1185
	case KVM_MMIO_REG_FPR:
1186 1187 1188
		if (vcpu->kvm->arch.kvm_ops->giveup_ext)
			vcpu->kvm->arch.kvm_ops->giveup_ext(vcpu, MSR_FP);

1189
		VCPU_FPR(vcpu, vcpu->arch.io_gpr & KVM_MMIO_REG_MASK) = gpr;
1190
		break;
1191
#ifdef CONFIG_PPC_BOOK3S
1192 1193
	case KVM_MMIO_REG_QPR:
		vcpu->arch.qpr[vcpu->arch.io_gpr & KVM_MMIO_REG_MASK] = gpr;
1194
		break;
1195
	case KVM_MMIO_REG_FQPR:
1196
		VCPU_FPR(vcpu, vcpu->arch.io_gpr & KVM_MMIO_REG_MASK) = gpr;
1197
		vcpu->arch.qpr[vcpu->arch.io_gpr & KVM_MMIO_REG_MASK] = gpr;
1198
		break;
1199 1200 1201
#endif
#ifdef CONFIG_VSX
	case KVM_MMIO_REG_VSX:
1202 1203 1204
		if (vcpu->kvm->arch.kvm_ops->giveup_ext)
			vcpu->kvm->arch.kvm_ops->giveup_ext(vcpu, MSR_VSX);

1205
		if (vcpu->arch.mmio_copy_type == KVMPPC_VSX_COPY_DWORD)
1206
			kvmppc_set_vsr_dword(vcpu, gpr);
1207
		else if (vcpu->arch.mmio_copy_type == KVMPPC_VSX_COPY_WORD)
1208
			kvmppc_set_vsr_word(vcpu, gpr);
1209
		else if (vcpu->arch.mmio_copy_type ==
1210 1211
				KVMPPC_VSX_COPY_DWORD_LOAD_DUMP)
			kvmppc_set_vsr_dword_dump(vcpu, gpr);
1212
		else if (vcpu->arch.mmio_copy_type ==
1213 1214
				KVMPPC_VSX_COPY_WORD_LOAD_DUMP)
			kvmppc_set_vsr_word_dump(vcpu, gpr);
1215
		break;
1216 1217 1218
#endif
#ifdef CONFIG_ALTIVEC
	case KVM_MMIO_REG_VMX:
1219 1220 1221
		if (vcpu->kvm->arch.kvm_ops->giveup_ext)
			vcpu->kvm->arch.kvm_ops->giveup_ext(vcpu, MSR_VEC);

1222 1223 1224 1225 1226 1227 1228 1229 1230 1231
		if (vcpu->arch.mmio_copy_type == KVMPPC_VMX_COPY_DWORD)
			kvmppc_set_vmx_dword(vcpu, gpr);
		else if (vcpu->arch.mmio_copy_type == KVMPPC_VMX_COPY_WORD)
			kvmppc_set_vmx_word(vcpu, gpr);
		else if (vcpu->arch.mmio_copy_type ==
				KVMPPC_VMX_COPY_HWORD)
			kvmppc_set_vmx_hword(vcpu, gpr);
		else if (vcpu->arch.mmio_copy_type ==
				KVMPPC_VMX_COPY_BYTE)
			kvmppc_set_vmx_byte(vcpu, gpr);
1232
		break;
1233 1234 1235 1236 1237 1238 1239 1240
#endif
#ifdef CONFIG_KVM_BOOK3S_HV_POSSIBLE
	case KVM_MMIO_REG_NESTED_GPR:
		if (kvmppc_need_byteswap(vcpu))
			gpr = swab64(gpr);
		kvm_vcpu_write_guest(vcpu, vcpu->arch.nested_io_gpr, &gpr,
				     sizeof(gpr));
		break;
1241
#endif
1242 1243 1244
	default:
		BUG();
	}
1245 1246
}

1247 1248 1249
static int __kvmppc_handle_load(struct kvm_run *run, struct kvm_vcpu *vcpu,
				unsigned int rt, unsigned int bytes,
				int is_default_endian, int sign_extend)
1250
{
1251
	int idx, ret;
1252
	bool host_swabbed;
1253

1254
	/* Pity C doesn't have a logical XOR operator */
1255
	if (kvmppc_need_byteswap(vcpu)) {
1256
		host_swabbed = is_default_endian;
1257
	} else {
1258
		host_swabbed = !is_default_endian;
1259
	}
1260

1261 1262 1263 1264 1265 1266 1267 1268 1269 1270
	if (bytes > sizeof(run->mmio.data)) {
		printk(KERN_ERR "%s: bad MMIO length: %d\n", __func__,
		       run->mmio.len);
	}

	run->mmio.phys_addr = vcpu->arch.paddr_accessed;
	run->mmio.len = bytes;
	run->mmio.is_write = 0;

	vcpu->arch.io_gpr = rt;
1271
	vcpu->arch.mmio_host_swabbed = host_swabbed;
1272 1273
	vcpu->mmio_needed = 1;
	vcpu->mmio_is_write = 0;
1274
	vcpu->arch.mmio_sign_extend = sign_extend;
1275

1276 1277
	idx = srcu_read_lock(&vcpu->kvm->srcu);

1278
	ret = kvm_io_bus_read(vcpu, KVM_MMIO_BUS, run->mmio.phys_addr,
1279 1280 1281 1282 1283
			      bytes, &run->mmio.data);

	srcu_read_unlock(&vcpu->kvm->srcu, idx);

	if (!ret) {
A
Alexander Graf 已提交
1284 1285 1286 1287 1288
		kvmppc_complete_mmio_load(vcpu, run);
		vcpu->mmio_needed = 0;
		return EMULATE_DONE;
	}

1289 1290
	return EMULATE_DO_MMIO;
}
1291 1292 1293 1294 1295 1296 1297

int kvmppc_handle_load(struct kvm_run *run, struct kvm_vcpu *vcpu,
		       unsigned int rt, unsigned int bytes,
		       int is_default_endian)
{
	return __kvmppc_handle_load(run, vcpu, rt, bytes, is_default_endian, 0);
}
1298
EXPORT_SYMBOL_GPL(kvmppc_handle_load);
1299

A
Alexander Graf 已提交
1300 1301
/* Same as above, but sign extends */
int kvmppc_handle_loads(struct kvm_run *run, struct kvm_vcpu *vcpu,
1302 1303
			unsigned int rt, unsigned int bytes,
			int is_default_endian)
A
Alexander Graf 已提交
1304
{
1305
	return __kvmppc_handle_load(run, vcpu, rt, bytes, is_default_endian, 1);
A
Alexander Graf 已提交
1306 1307
}

1308 1309 1310 1311 1312 1313 1314
#ifdef CONFIG_VSX
int kvmppc_handle_vsx_load(struct kvm_run *run, struct kvm_vcpu *vcpu,
			unsigned int rt, unsigned int bytes,
			int is_default_endian, int mmio_sign_extend)
{
	enum emulation_result emulated = EMULATE_DONE;

1315 1316
	/* Currently, mmio_vsx_copy_nums only allowed to be 4 or less */
	if (vcpu->arch.mmio_vsx_copy_nums > 4)
1317 1318 1319 1320 1321 1322 1323 1324 1325 1326 1327 1328 1329 1330 1331 1332 1333 1334
		return EMULATE_FAIL;

	while (vcpu->arch.mmio_vsx_copy_nums) {
		emulated = __kvmppc_handle_load(run, vcpu, rt, bytes,
			is_default_endian, mmio_sign_extend);

		if (emulated != EMULATE_DONE)
			break;

		vcpu->arch.paddr_accessed += run->mmio.len;

		vcpu->arch.mmio_vsx_copy_nums--;
		vcpu->arch.mmio_vsx_offset++;
	}
	return emulated;
}
#endif /* CONFIG_VSX */

1335
int kvmppc_handle_store(struct kvm_run *run, struct kvm_vcpu *vcpu,
1336
			u64 val, unsigned int bytes, int is_default_endian)
1337 1338
{
	void *data = run->mmio.data;
1339
	int idx, ret;
1340
	bool host_swabbed;
1341

1342
	/* Pity C doesn't have a logical XOR operator */
1343
	if (kvmppc_need_byteswap(vcpu)) {
1344
		host_swabbed = is_default_endian;
1345
	} else {
1346
		host_swabbed = !is_default_endian;
1347
	}
1348 1349 1350 1351 1352 1353 1354 1355 1356 1357 1358 1359

	if (bytes > sizeof(run->mmio.data)) {
		printk(KERN_ERR "%s: bad MMIO length: %d\n", __func__,
		       run->mmio.len);
	}

	run->mmio.phys_addr = vcpu->arch.paddr_accessed;
	run->mmio.len = bytes;
	run->mmio.is_write = 1;
	vcpu->mmio_needed = 1;
	vcpu->mmio_is_write = 1;

1360 1361 1362
	if ((vcpu->arch.mmio_sp64_extend) && (bytes == 4))
		val = dp_to_sp(val);

1363
	/* Store the value at the lowest bytes in 'data'. */
1364
	if (!host_swabbed) {
1365
		switch (bytes) {
1366
		case 8: *(u64 *)data = val; break;
1367 1368 1369 1370 1371 1372
		case 4: *(u32 *)data = val; break;
		case 2: *(u16 *)data = val; break;
		case 1: *(u8  *)data = val; break;
		}
	} else {
		switch (bytes) {
1373 1374 1375 1376
		case 8: *(u64 *)data = swab64(val); break;
		case 4: *(u32 *)data = swab32(val); break;
		case 2: *(u16 *)data = swab16(val); break;
		case 1: *(u8  *)data = val; break;
1377 1378 1379
		}
	}

1380 1381
	idx = srcu_read_lock(&vcpu->kvm->srcu);

1382
	ret = kvm_io_bus_write(vcpu, KVM_MMIO_BUS, run->mmio.phys_addr,
1383 1384 1385 1386 1387
			       bytes, &run->mmio.data);

	srcu_read_unlock(&vcpu->kvm->srcu, idx);

	if (!ret) {
A
Alexander Graf 已提交
1388 1389 1390 1391
		vcpu->mmio_needed = 0;
		return EMULATE_DONE;
	}

1392 1393
	return EMULATE_DO_MMIO;
}
1394
EXPORT_SYMBOL_GPL(kvmppc_handle_store);
1395

1396 1397 1398 1399 1400 1401
#ifdef CONFIG_VSX
static inline int kvmppc_get_vsr_data(struct kvm_vcpu *vcpu, int rs, u64 *val)
{
	u32 dword_offset, word_offset;
	union kvmppc_one_reg reg;
	int vsx_offset = 0;
1402
	int copy_type = vcpu->arch.mmio_copy_type;
1403 1404 1405 1406 1407 1408 1409 1410 1411 1412 1413 1414
	int result = 0;

	switch (copy_type) {
	case KVMPPC_VSX_COPY_DWORD:
		vsx_offset =
			kvmppc_get_vsr_dword_offset(vcpu->arch.mmio_vsx_offset);

		if (vsx_offset == -1) {
			result = -1;
			break;
		}

1415
		if (rs < 32) {
1416 1417
			*val = VCPU_VSX_FPR(vcpu, rs, vsx_offset);
		} else {
1418
			reg.vval = VCPU_VSX_VR(vcpu, rs - 32);
1419 1420 1421 1422 1423 1424 1425 1426 1427 1428 1429 1430 1431
			*val = reg.vsxval[vsx_offset];
		}
		break;

	case KVMPPC_VSX_COPY_WORD:
		vsx_offset =
			kvmppc_get_vsr_word_offset(vcpu->arch.mmio_vsx_offset);

		if (vsx_offset == -1) {
			result = -1;
			break;
		}

1432
		if (rs < 32) {
1433 1434 1435 1436 1437
			dword_offset = vsx_offset / 2;
			word_offset = vsx_offset % 2;
			reg.vsxval[0] = VCPU_VSX_FPR(vcpu, rs, dword_offset);
			*val = reg.vsx32val[word_offset];
		} else {
1438
			reg.vval = VCPU_VSX_VR(vcpu, rs - 32);
1439 1440 1441 1442 1443 1444 1445 1446 1447 1448 1449 1450 1451 1452 1453 1454 1455 1456 1457 1458
			*val = reg.vsx32val[vsx_offset];
		}
		break;

	default:
		result = -1;
		break;
	}

	return result;
}

int kvmppc_handle_vsx_store(struct kvm_run *run, struct kvm_vcpu *vcpu,
			int rs, unsigned int bytes, int is_default_endian)
{
	u64 val;
	enum emulation_result emulated = EMULATE_DONE;

	vcpu->arch.io_gpr = rs;

1459 1460
	/* Currently, mmio_vsx_copy_nums only allowed to be 4 or less */
	if (vcpu->arch.mmio_vsx_copy_nums > 4)
1461 1462 1463 1464 1465 1466 1467 1468 1469 1470 1471 1472 1473 1474 1475 1476 1477 1478 1479 1480 1481 1482 1483 1484 1485 1486 1487 1488 1489 1490 1491 1492 1493 1494 1495 1496 1497 1498 1499 1500 1501 1502 1503 1504 1505 1506 1507 1508 1509 1510 1511 1512 1513 1514 1515 1516
		return EMULATE_FAIL;

	while (vcpu->arch.mmio_vsx_copy_nums) {
		if (kvmppc_get_vsr_data(vcpu, rs, &val) == -1)
			return EMULATE_FAIL;

		emulated = kvmppc_handle_store(run, vcpu,
			 val, bytes, is_default_endian);

		if (emulated != EMULATE_DONE)
			break;

		vcpu->arch.paddr_accessed += run->mmio.len;

		vcpu->arch.mmio_vsx_copy_nums--;
		vcpu->arch.mmio_vsx_offset++;
	}

	return emulated;
}

static int kvmppc_emulate_mmio_vsx_loadstore(struct kvm_vcpu *vcpu,
			struct kvm_run *run)
{
	enum emulation_result emulated = EMULATE_FAIL;
	int r;

	vcpu->arch.paddr_accessed += run->mmio.len;

	if (!vcpu->mmio_is_write) {
		emulated = kvmppc_handle_vsx_load(run, vcpu, vcpu->arch.io_gpr,
			 run->mmio.len, 1, vcpu->arch.mmio_sign_extend);
	} else {
		emulated = kvmppc_handle_vsx_store(run, vcpu,
			 vcpu->arch.io_gpr, run->mmio.len, 1);
	}

	switch (emulated) {
	case EMULATE_DO_MMIO:
		run->exit_reason = KVM_EXIT_MMIO;
		r = RESUME_HOST;
		break;
	case EMULATE_FAIL:
		pr_info("KVM: MMIO emulation failed (VSX repeat)\n");
		run->exit_reason = KVM_EXIT_INTERNAL_ERROR;
		run->internal.suberror = KVM_INTERNAL_ERROR_EMULATION;
		r = RESUME_HOST;
		break;
	default:
		r = RESUME_GUEST;
		break;
	}
	return r;
}
#endif /* CONFIG_VSX */

1517
#ifdef CONFIG_ALTIVEC
1518 1519
int kvmppc_handle_vmx_load(struct kvm_run *run, struct kvm_vcpu *vcpu,
		unsigned int rt, unsigned int bytes, int is_default_endian)
1520
{
1521
	enum emulation_result emulated = EMULATE_DONE;
1522

1523 1524 1525
	if (vcpu->arch.mmio_vsx_copy_nums > 2)
		return EMULATE_FAIL;

1526
	while (vcpu->arch.mmio_vmx_copy_nums) {
1527
		emulated = __kvmppc_handle_load(run, vcpu, rt, bytes,
1528 1529 1530 1531 1532 1533 1534
				is_default_endian, 0);

		if (emulated != EMULATE_DONE)
			break;

		vcpu->arch.paddr_accessed += run->mmio.len;
		vcpu->arch.mmio_vmx_copy_nums--;
1535
		vcpu->arch.mmio_vmx_offset++;
1536 1537 1538 1539 1540
	}

	return emulated;
}

1541
int kvmppc_get_vmx_dword(struct kvm_vcpu *vcpu, int index, u64 *val)
1542
{
1543 1544 1545
	union kvmppc_one_reg reg;
	int vmx_offset = 0;
	int result = 0;
1546

1547 1548
	vmx_offset =
		kvmppc_get_vmx_dword_offset(vcpu, vcpu->arch.mmio_vmx_offset);
1549

1550
	if (vmx_offset == -1)
1551 1552
		return -1;

1553 1554
	reg.vval = VCPU_VSX_VR(vcpu, index);
	*val = reg.vsxval[vmx_offset];
1555

1556 1557
	return result;
}
1558

1559 1560 1561 1562 1563 1564 1565 1566 1567 1568 1569 1570 1571 1572 1573 1574 1575 1576 1577 1578 1579 1580 1581 1582 1583 1584 1585 1586 1587 1588 1589 1590 1591 1592
int kvmppc_get_vmx_word(struct kvm_vcpu *vcpu, int index, u64 *val)
{
	union kvmppc_one_reg reg;
	int vmx_offset = 0;
	int result = 0;

	vmx_offset =
		kvmppc_get_vmx_word_offset(vcpu, vcpu->arch.mmio_vmx_offset);

	if (vmx_offset == -1)
		return -1;

	reg.vval = VCPU_VSX_VR(vcpu, index);
	*val = reg.vsx32val[vmx_offset];

	return result;
}

int kvmppc_get_vmx_hword(struct kvm_vcpu *vcpu, int index, u64 *val)
{
	union kvmppc_one_reg reg;
	int vmx_offset = 0;
	int result = 0;

	vmx_offset =
		kvmppc_get_vmx_hword_offset(vcpu, vcpu->arch.mmio_vmx_offset);

	if (vmx_offset == -1)
		return -1;

	reg.vval = VCPU_VSX_VR(vcpu, index);
	*val = reg.vsx16val[vmx_offset];

	return result;
1593 1594
}

1595 1596 1597 1598 1599 1600 1601 1602 1603 1604 1605 1606 1607 1608 1609 1610
int kvmppc_get_vmx_byte(struct kvm_vcpu *vcpu, int index, u64 *val)
{
	union kvmppc_one_reg reg;
	int vmx_offset = 0;
	int result = 0;

	vmx_offset =
		kvmppc_get_vmx_byte_offset(vcpu, vcpu->arch.mmio_vmx_offset);

	if (vmx_offset == -1)
		return -1;

	reg.vval = VCPU_VSX_VR(vcpu, index);
	*val = reg.vsx8val[vmx_offset];

	return result;
1611 1612
}

1613 1614
int kvmppc_handle_vmx_store(struct kvm_run *run, struct kvm_vcpu *vcpu,
		unsigned int rs, unsigned int bytes, int is_default_endian)
1615 1616
{
	u64 val = 0;
1617
	unsigned int index = rs & KVM_MMIO_REG_MASK;
1618 1619
	enum emulation_result emulated = EMULATE_DONE;

1620 1621 1622
	if (vcpu->arch.mmio_vsx_copy_nums > 2)
		return EMULATE_FAIL;

1623 1624 1625
	vcpu->arch.io_gpr = rs;

	while (vcpu->arch.mmio_vmx_copy_nums) {
1626 1627 1628 1629 1630 1631 1632 1633 1634 1635 1636 1637 1638 1639 1640 1641 1642 1643 1644
		switch (vcpu->arch.mmio_copy_type) {
		case KVMPPC_VMX_COPY_DWORD:
			if (kvmppc_get_vmx_dword(vcpu, index, &val) == -1)
				return EMULATE_FAIL;

			break;
		case KVMPPC_VMX_COPY_WORD:
			if (kvmppc_get_vmx_word(vcpu, index, &val) == -1)
				return EMULATE_FAIL;
			break;
		case KVMPPC_VMX_COPY_HWORD:
			if (kvmppc_get_vmx_hword(vcpu, index, &val) == -1)
				return EMULATE_FAIL;
			break;
		case KVMPPC_VMX_COPY_BYTE:
			if (kvmppc_get_vmx_byte(vcpu, index, &val) == -1)
				return EMULATE_FAIL;
			break;
		default:
1645
			return EMULATE_FAIL;
1646
		}
1647

1648
		emulated = kvmppc_handle_store(run, vcpu, val, bytes,
1649 1650 1651 1652 1653 1654
				is_default_endian);
		if (emulated != EMULATE_DONE)
			break;

		vcpu->arch.paddr_accessed += run->mmio.len;
		vcpu->arch.mmio_vmx_copy_nums--;
1655
		vcpu->arch.mmio_vmx_offset++;
1656 1657 1658 1659 1660 1661 1662 1663 1664 1665 1666 1667 1668 1669
	}

	return emulated;
}

static int kvmppc_emulate_mmio_vmx_loadstore(struct kvm_vcpu *vcpu,
		struct kvm_run *run)
{
	enum emulation_result emulated = EMULATE_FAIL;
	int r;

	vcpu->arch.paddr_accessed += run->mmio.len;

	if (!vcpu->mmio_is_write) {
1670 1671
		emulated = kvmppc_handle_vmx_load(run, vcpu,
				vcpu->arch.io_gpr, run->mmio.len, 1);
1672
	} else {
1673 1674
		emulated = kvmppc_handle_vmx_store(run, vcpu,
				vcpu->arch.io_gpr, run->mmio.len, 1);
1675 1676 1677 1678 1679 1680 1681 1682 1683 1684 1685 1686 1687 1688 1689 1690 1691 1692 1693 1694 1695
	}

	switch (emulated) {
	case EMULATE_DO_MMIO:
		run->exit_reason = KVM_EXIT_MMIO;
		r = RESUME_HOST;
		break;
	case EMULATE_FAIL:
		pr_info("KVM: MMIO emulation failed (VMX repeat)\n");
		run->exit_reason = KVM_EXIT_INTERNAL_ERROR;
		run->internal.suberror = KVM_INTERNAL_ERROR_EMULATION;
		r = RESUME_HOST;
		break;
	default:
		r = RESUME_GUEST;
		break;
	}
	return r;
}
#endif /* CONFIG_ALTIVEC */

1696 1697 1698 1699 1700 1701 1702 1703 1704 1705 1706 1707 1708 1709
int kvm_vcpu_ioctl_get_one_reg(struct kvm_vcpu *vcpu, struct kvm_one_reg *reg)
{
	int r = 0;
	union kvmppc_one_reg val;
	int size;

	size = one_reg_size(reg->id);
	if (size > sizeof(val))
		return -EINVAL;

	r = kvmppc_get_one_reg(vcpu, reg->id, &val);
	if (r == -EINVAL) {
		r = 0;
		switch (reg->id) {
1710 1711 1712 1713 1714 1715
#ifdef CONFIG_ALTIVEC
		case KVM_REG_PPC_VR0 ... KVM_REG_PPC_VR31:
			if (!cpu_has_feature(CPU_FTR_ALTIVEC)) {
				r = -ENXIO;
				break;
			}
1716
			val.vval = vcpu->arch.vr.vr[reg->id - KVM_REG_PPC_VR0];
1717 1718 1719 1720 1721 1722
			break;
		case KVM_REG_PPC_VSCR:
			if (!cpu_has_feature(CPU_FTR_ALTIVEC)) {
				r = -ENXIO;
				break;
			}
1723
			val = get_reg_val(reg->id, vcpu->arch.vr.vscr.u[3]);
1724 1725
			break;
		case KVM_REG_PPC_VRSAVE:
1726
			val = get_reg_val(reg->id, vcpu->arch.vrsave);
1727 1728
			break;
#endif /* CONFIG_ALTIVEC */
1729 1730 1731 1732 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
		default:
			r = -EINVAL;
			break;
		}
	}

	if (r)
		return r;

	if (copy_to_user((char __user *)(unsigned long)reg->addr, &val, size))
		r = -EFAULT;

	return r;
}

int kvm_vcpu_ioctl_set_one_reg(struct kvm_vcpu *vcpu, struct kvm_one_reg *reg)
{
	int r;
	union kvmppc_one_reg val;
	int size;

	size = one_reg_size(reg->id);
	if (size > sizeof(val))
		return -EINVAL;

	if (copy_from_user(&val, (char __user *)(unsigned long)reg->addr, size))
		return -EFAULT;

	r = kvmppc_set_one_reg(vcpu, reg->id, &val);
	if (r == -EINVAL) {
		r = 0;
		switch (reg->id) {
1761 1762 1763 1764 1765 1766
#ifdef CONFIG_ALTIVEC
		case KVM_REG_PPC_VR0 ... KVM_REG_PPC_VR31:
			if (!cpu_has_feature(CPU_FTR_ALTIVEC)) {
				r = -ENXIO;
				break;
			}
1767
			vcpu->arch.vr.vr[reg->id - KVM_REG_PPC_VR0] = val.vval;
1768 1769 1770 1771 1772 1773
			break;
		case KVM_REG_PPC_VSCR:
			if (!cpu_has_feature(CPU_FTR_ALTIVEC)) {
				r = -ENXIO;
				break;
			}
1774
			vcpu->arch.vr.vscr.u[3] = set_reg_val(reg->id, val);
1775 1776
			break;
		case KVM_REG_PPC_VRSAVE:
1777 1778 1779 1780 1781
			if (!cpu_has_feature(CPU_FTR_ALTIVEC)) {
				r = -ENXIO;
				break;
			}
			vcpu->arch.vrsave = set_reg_val(reg->id, val);
1782 1783
			break;
#endif /* CONFIG_ALTIVEC */
1784 1785 1786 1787 1788 1789 1790 1791 1792
		default:
			r = -EINVAL;
			break;
		}
	}

	return r;
}

1793 1794 1795 1796
int kvm_arch_vcpu_ioctl_run(struct kvm_vcpu *vcpu, struct kvm_run *run)
{
	int r;

1797 1798
	vcpu_load(vcpu);

1799
	if (vcpu->mmio_needed) {
1800
		vcpu->mmio_needed = 0;
1801 1802
		if (!vcpu->mmio_is_write)
			kvmppc_complete_mmio_load(vcpu, run);
1803 1804 1805 1806 1807 1808 1809 1810 1811 1812
#ifdef CONFIG_VSX
		if (vcpu->arch.mmio_vsx_copy_nums > 0) {
			vcpu->arch.mmio_vsx_copy_nums--;
			vcpu->arch.mmio_vsx_offset++;
		}

		if (vcpu->arch.mmio_vsx_copy_nums > 0) {
			r = kvmppc_emulate_mmio_vsx_loadstore(vcpu, run);
			if (r == RESUME_HOST) {
				vcpu->mmio_needed = 1;
1813
				goto out;
1814 1815
			}
		}
1816 1817
#endif
#ifdef CONFIG_ALTIVEC
1818
		if (vcpu->arch.mmio_vmx_copy_nums > 0) {
1819
			vcpu->arch.mmio_vmx_copy_nums--;
1820 1821
			vcpu->arch.mmio_vmx_offset++;
		}
1822 1823 1824 1825 1826

		if (vcpu->arch.mmio_vmx_copy_nums > 0) {
			r = kvmppc_emulate_mmio_vmx_loadstore(vcpu, run);
			if (r == RESUME_HOST) {
				vcpu->mmio_needed = 1;
1827
				goto out;
1828 1829
			}
		}
1830
#endif
1831 1832 1833 1834 1835 1836 1837
	} else if (vcpu->arch.osi_needed) {
		u64 *gprs = run->osi.gprs;
		int i;

		for (i = 0; i < 32; i++)
			kvmppc_set_gpr(vcpu, i, gprs[i]);
		vcpu->arch.osi_needed = 0;
1838 1839 1840 1841 1842 1843 1844
	} else if (vcpu->arch.hcall_needed) {
		int i;

		kvmppc_set_gpr(vcpu, 3, run->papr_hcall.ret);
		for (i = 0; i < 9; ++i)
			kvmppc_set_gpr(vcpu, 4 + i, run->papr_hcall.args[i]);
		vcpu->arch.hcall_needed = 0;
1845 1846 1847 1848 1849
#ifdef CONFIG_BOOKE
	} else if (vcpu->arch.epr_needed) {
		kvmppc_set_epr(vcpu, run->epr.epr);
		vcpu->arch.epr_needed = 0;
#endif
1850 1851
	}

1852
	kvm_sigset_activate(vcpu);
1853

1854 1855 1856 1857
	if (run->immediate_exit)
		r = -EINTR;
	else
		r = kvmppc_vcpu_run(run, vcpu);
1858

1859
	kvm_sigset_deactivate(vcpu);
1860

1861
#ifdef CONFIG_ALTIVEC
1862
out:
1863
#endif
1864
	vcpu_put(vcpu);
1865 1866 1867 1868 1869
	return r;
}

int kvm_vcpu_ioctl_interrupt(struct kvm_vcpu *vcpu, struct kvm_interrupt *irq)
{
1870
	if (irq->irq == KVM_INTERRUPT_UNSET) {
1871
		kvmppc_core_dequeue_external(vcpu);
1872 1873 1874 1875
		return 0;
	}

	kvmppc_core_queue_external(vcpu, irq);
1876

1877
	kvm_vcpu_kick(vcpu);
1878

1879 1880 1881
	return 0;
}

1882 1883 1884 1885 1886 1887 1888 1889 1890
static int kvm_vcpu_ioctl_enable_cap(struct kvm_vcpu *vcpu,
				     struct kvm_enable_cap *cap)
{
	int r;

	if (cap->flags)
		return -EINVAL;

	switch (cap->cap) {
1891 1892 1893 1894
	case KVM_CAP_PPC_OSI:
		r = 0;
		vcpu->arch.osi_enabled = true;
		break;
1895 1896 1897 1898
	case KVM_CAP_PPC_PAPR:
		r = 0;
		vcpu->arch.papr_enabled = true;
		break;
1899 1900
	case KVM_CAP_PPC_EPR:
		r = 0;
1901 1902 1903 1904
		if (cap->args[0])
			vcpu->arch.epr_flags |= KVMPPC_EPR_USER;
		else
			vcpu->arch.epr_flags &= ~KVMPPC_EPR_USER;
1905
		break;
1906 1907 1908 1909 1910 1911
#ifdef CONFIG_BOOKE
	case KVM_CAP_PPC_BOOKE_WATCHDOG:
		r = 0;
		vcpu->arch.watchdog_enabled = true;
		break;
#endif
1912
#if defined(CONFIG_KVM_E500V2) || defined(CONFIG_KVM_E500MC)
S
Scott Wood 已提交
1913 1914 1915 1916 1917 1918 1919 1920 1921 1922
	case KVM_CAP_SW_TLB: {
		struct kvm_config_tlb cfg;
		void __user *user_ptr = (void __user *)(uintptr_t)cap->args[0];

		r = -EFAULT;
		if (copy_from_user(&cfg, user_ptr, sizeof(cfg)))
			break;

		r = kvm_vcpu_ioctl_config_tlb(vcpu, &cfg);
		break;
S
Scott Wood 已提交
1923 1924 1925 1926
	}
#endif
#ifdef CONFIG_KVM_MPIC
	case KVM_CAP_IRQ_MPIC: {
A
Al Viro 已提交
1927
		struct fd f;
S
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1928 1929 1930
		struct kvm_device *dev;

		r = -EBADF;
A
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1931 1932
		f = fdget(cap->args[0]);
		if (!f.file)
S
Scott Wood 已提交
1933 1934 1935
			break;

		r = -EPERM;
A
Al Viro 已提交
1936
		dev = kvm_device_from_filp(f.file);
S
Scott Wood 已提交
1937 1938 1939
		if (dev)
			r = kvmppc_mpic_connect_vcpu(dev, vcpu, cap->args[1]);

A
Al Viro 已提交
1940
		fdput(f);
S
Scott Wood 已提交
1941
		break;
S
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1942 1943
	}
#endif
1944 1945
#ifdef CONFIG_KVM_XICS
	case KVM_CAP_IRQ_XICS: {
A
Al Viro 已提交
1946
		struct fd f;
1947 1948 1949
		struct kvm_device *dev;

		r = -EBADF;
A
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1950 1951
		f = fdget(cap->args[0]);
		if (!f.file)
1952 1953 1954
			break;

		r = -EPERM;
A
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1955
		dev = kvm_device_from_filp(f.file);
1956
		if (dev) {
1957
			if (xics_on_xive())
1958 1959 1960 1961
				r = kvmppc_xive_connect_vcpu(dev, vcpu, cap->args[1]);
			else
				r = kvmppc_xics_connect_vcpu(dev, vcpu, cap->args[1]);
		}
1962

A
Al Viro 已提交
1963
		fdput(f);
1964 1965 1966
		break;
	}
#endif /* CONFIG_KVM_XICS */
1967 1968 1969 1970 1971 1972 1973 1974 1975 1976 1977 1978 1979 1980 1981 1982 1983 1984 1985 1986 1987 1988 1989 1990
#ifdef CONFIG_KVM_XIVE
	case KVM_CAP_PPC_IRQ_XIVE: {
		struct fd f;
		struct kvm_device *dev;

		r = -EBADF;
		f = fdget(cap->args[0]);
		if (!f.file)
			break;

		r = -ENXIO;
		if (!xive_enabled())
			break;

		r = -EPERM;
		dev = kvm_device_from_filp(f.file);
		if (dev)
			r = kvmppc_xive_native_connect_vcpu(dev, vcpu,
							    cap->args[1]);

		fdput(f);
		break;
	}
#endif /* CONFIG_KVM_XIVE */
1991 1992 1993 1994 1995 1996 1997 1998 1999
#ifdef CONFIG_KVM_BOOK3S_HV_POSSIBLE
	case KVM_CAP_PPC_FWNMI:
		r = -EINVAL;
		if (!is_kvmppc_hv_enabled(vcpu->kvm))
			break;
		r = 0;
		vcpu->kvm->arch.fwnmi_enabled = true;
		break;
#endif /* CONFIG_KVM_BOOK3S_HV_POSSIBLE */
2000 2001 2002 2003 2004
	default:
		r = -EINVAL;
		break;
	}

2005 2006 2007
	if (!r)
		r = kvmppc_sanity_check(vcpu);

2008 2009 2010
	return r;
}

2011 2012 2013 2014 2015 2016 2017
bool kvm_arch_intc_initialized(struct kvm *kvm)
{
#ifdef CONFIG_KVM_MPIC
	if (kvm->arch.mpic)
		return true;
#endif
#ifdef CONFIG_KVM_XICS
2018
	if (kvm->arch.xics || kvm->arch.xive)
2019 2020 2021 2022 2023
		return true;
#endif
	return false;
}

2024 2025 2026 2027 2028 2029 2030 2031 2032 2033 2034 2035
int kvm_arch_vcpu_ioctl_get_mpstate(struct kvm_vcpu *vcpu,
                                    struct kvm_mp_state *mp_state)
{
	return -EINVAL;
}

int kvm_arch_vcpu_ioctl_set_mpstate(struct kvm_vcpu *vcpu,
                                    struct kvm_mp_state *mp_state)
{
	return -EINVAL;
}

2036 2037
long kvm_arch_vcpu_async_ioctl(struct file *filp,
			       unsigned int ioctl, unsigned long arg)
2038 2039 2040 2041
{
	struct kvm_vcpu *vcpu = filp->private_data;
	void __user *argp = (void __user *)arg;

2042
	if (ioctl == KVM_INTERRUPT) {
2043 2044
		struct kvm_interrupt irq;
		if (copy_from_user(&irq, argp, sizeof(irq)))
2045 2046
			return -EFAULT;
		return kvm_vcpu_ioctl_interrupt(vcpu, &irq);
2047
	}
2048 2049 2050 2051 2052 2053 2054 2055 2056
	return -ENOIOCTLCMD;
}

long kvm_arch_vcpu_ioctl(struct file *filp,
                         unsigned int ioctl, unsigned long arg)
{
	struct kvm_vcpu *vcpu = filp->private_data;
	void __user *argp = (void __user *)arg;
	long r;
2057

2058
	switch (ioctl) {
2059 2060 2061 2062
	case KVM_ENABLE_CAP:
	{
		struct kvm_enable_cap cap;
		r = -EFAULT;
2063
		vcpu_load(vcpu);
2064 2065 2066
		if (copy_from_user(&cap, argp, sizeof(cap)))
			goto out;
		r = kvm_vcpu_ioctl_enable_cap(vcpu, &cap);
2067
		vcpu_put(vcpu);
2068 2069
		break;
	}
S
Scott Wood 已提交
2070

2071 2072 2073 2074 2075 2076 2077 2078 2079 2080 2081 2082 2083 2084
	case KVM_SET_ONE_REG:
	case KVM_GET_ONE_REG:
	{
		struct kvm_one_reg reg;
		r = -EFAULT;
		if (copy_from_user(&reg, argp, sizeof(reg)))
			goto out;
		if (ioctl == KVM_SET_ONE_REG)
			r = kvm_vcpu_ioctl_set_one_reg(vcpu, &reg);
		else
			r = kvm_vcpu_ioctl_get_one_reg(vcpu, &reg);
		break;
	}

2085
#if defined(CONFIG_KVM_E500V2) || defined(CONFIG_KVM_E500MC)
S
Scott Wood 已提交
2086 2087 2088
	case KVM_DIRTY_TLB: {
		struct kvm_dirty_tlb dirty;
		r = -EFAULT;
2089
		vcpu_load(vcpu);
S
Scott Wood 已提交
2090 2091 2092
		if (copy_from_user(&dirty, argp, sizeof(dirty)))
			goto out;
		r = kvm_vcpu_ioctl_dirty_tlb(vcpu, &dirty);
2093
		vcpu_put(vcpu);
S
Scott Wood 已提交
2094 2095 2096
		break;
	}
#endif
2097 2098 2099 2100 2101 2102 2103 2104
	default:
		r = -EINVAL;
	}

out:
	return r;
}

2105
vm_fault_t kvm_arch_vcpu_fault(struct kvm_vcpu *vcpu, struct vm_fault *vmf)
2106 2107 2108 2109
{
	return VM_FAULT_SIGBUS;
}

2110 2111
static int kvm_vm_ioctl_get_pvinfo(struct kvm_ppc_pvinfo *pvinfo)
{
2112 2113 2114
	u32 inst_nop = 0x60000000;
#ifdef CONFIG_KVM_BOOKE_HV
	u32 inst_sc1 = 0x44000022;
2115 2116 2117 2118
	pvinfo->hcall[0] = cpu_to_be32(inst_sc1);
	pvinfo->hcall[1] = cpu_to_be32(inst_nop);
	pvinfo->hcall[2] = cpu_to_be32(inst_nop);
	pvinfo->hcall[3] = cpu_to_be32(inst_nop);
2119
#else
2120 2121 2122 2123 2124 2125 2126 2127 2128 2129 2130 2131 2132 2133
	u32 inst_lis = 0x3c000000;
	u32 inst_ori = 0x60000000;
	u32 inst_sc = 0x44000002;
	u32 inst_imm_mask = 0xffff;

	/*
	 * The hypercall to get into KVM from within guest context is as
	 * follows:
	 *
	 *    lis r0, r0, KVM_SC_MAGIC_R0@h
	 *    ori r0, KVM_SC_MAGIC_R0@l
	 *    sc
	 *    nop
	 */
2134 2135 2136 2137
	pvinfo->hcall[0] = cpu_to_be32(inst_lis | ((KVM_SC_MAGIC_R0 >> 16) & inst_imm_mask));
	pvinfo->hcall[1] = cpu_to_be32(inst_ori | (KVM_SC_MAGIC_R0 & inst_imm_mask));
	pvinfo->hcall[2] = cpu_to_be32(inst_sc);
	pvinfo->hcall[3] = cpu_to_be32(inst_nop);
2138
#endif
2139

2140 2141
	pvinfo->flags = KVM_PPC_PVINFO_FLAGS_EV_IDLE;

2142 2143 2144
	return 0;
}

2145 2146 2147 2148 2149 2150 2151 2152 2153 2154 2155 2156
int kvm_vm_ioctl_irq_line(struct kvm *kvm, struct kvm_irq_level *irq_event,
			  bool line_status)
{
	if (!irqchip_in_kernel(kvm))
		return -ENXIO;

	irq_event->status = kvm_set_irq(kvm, KVM_USERSPACE_IRQ_SOURCE_ID,
					irq_event->irq, irq_event->level,
					line_status);
	return 0;
}

2157

2158 2159
int kvm_vm_ioctl_enable_cap(struct kvm *kvm,
			    struct kvm_enable_cap *cap)
2160 2161 2162 2163 2164 2165 2166 2167 2168 2169 2170 2171 2172 2173 2174
{
	int r;

	if (cap->flags)
		return -EINVAL;

	switch (cap->cap) {
#ifdef CONFIG_KVM_BOOK3S_64_HANDLER
	case KVM_CAP_PPC_ENABLE_HCALL: {
		unsigned long hcall = cap->args[0];

		r = -EINVAL;
		if (hcall > MAX_HCALL_OPCODE || (hcall & 3) ||
		    cap->args[1] > 1)
			break;
2175 2176
		if (!kvmppc_book3s_hcall_implemented(kvm, hcall))
			break;
2177 2178 2179 2180 2181 2182 2183
		if (cap->args[1])
			set_bit(hcall / 4, kvm->arch.enabled_hcalls);
		else
			clear_bit(hcall / 4, kvm->arch.enabled_hcalls);
		r = 0;
		break;
	}
2184 2185 2186 2187 2188 2189 2190 2191 2192
	case KVM_CAP_PPC_SMT: {
		unsigned long mode = cap->args[0];
		unsigned long flags = cap->args[1];

		r = -EINVAL;
		if (kvm->arch.kvm_ops->set_smt_mode)
			r = kvm->arch.kvm_ops->set_smt_mode(kvm, mode, flags);
		break;
	}
2193 2194 2195 2196 2197 2198 2199 2200

	case KVM_CAP_PPC_NESTED_HV:
		r = -EINVAL;
		if (!is_kvmppc_hv_enabled(kvm) ||
		    !kvm->arch.kvm_ops->enable_nested)
			break;
		r = kvm->arch.kvm_ops->enable_nested(kvm);
		break;
2201 2202 2203 2204 2205 2206 2207 2208 2209
#endif
	default:
		r = -EINVAL;
		break;
	}

	return r;
}

2210 2211 2212 2213 2214 2215 2216 2217 2218 2219 2220 2221 2222 2223 2224 2225 2226 2227 2228 2229 2230 2231 2232 2233 2234 2235 2236 2237 2238
#ifdef CONFIG_PPC_BOOK3S_64
/*
 * These functions check whether the underlying hardware is safe
 * against attacks based on observing the effects of speculatively
 * executed instructions, and whether it supplies instructions for
 * use in workarounds.  The information comes from firmware, either
 * via the device tree on powernv platforms or from an hcall on
 * pseries platforms.
 */
#ifdef CONFIG_PPC_PSERIES
static int pseries_get_cpu_char(struct kvm_ppc_cpu_char *cp)
{
	struct h_cpu_char_result c;
	unsigned long rc;

	if (!machine_is(pseries))
		return -ENOTTY;

	rc = plpar_get_cpu_characteristics(&c);
	if (rc == H_SUCCESS) {
		cp->character = c.character;
		cp->behaviour = c.behaviour;
		cp->character_mask = KVM_PPC_CPU_CHAR_SPEC_BAR_ORI31 |
			KVM_PPC_CPU_CHAR_BCCTRL_SERIALISED |
			KVM_PPC_CPU_CHAR_L1D_FLUSH_ORI30 |
			KVM_PPC_CPU_CHAR_L1D_FLUSH_TRIG2 |
			KVM_PPC_CPU_CHAR_L1D_THREAD_PRIV |
			KVM_PPC_CPU_CHAR_BR_HINT_HONOURED |
			KVM_PPC_CPU_CHAR_MTTRIG_THR_RECONF |
2239 2240
			KVM_PPC_CPU_CHAR_COUNT_CACHE_DIS |
			KVM_PPC_CPU_CHAR_BCCTR_FLUSH_ASSIST;
2241 2242
		cp->behaviour_mask = KVM_PPC_CPU_BEHAV_FAVOUR_SECURITY |
			KVM_PPC_CPU_BEHAV_L1D_FLUSH_PR |
2243 2244
			KVM_PPC_CPU_BEHAV_BNDS_CHK_SPEC_BAR |
			KVM_PPC_CPU_BEHAV_FLUSH_COUNT_CACHE;
2245 2246 2247 2248 2249 2250 2251 2252 2253 2254 2255 2256 2257 2258 2259 2260 2261 2262 2263 2264 2265 2266 2267 2268 2269 2270 2271 2272 2273 2274 2275 2276 2277 2278 2279 2280 2281 2282 2283 2284 2285 2286 2287 2288 2289 2290 2291 2292 2293 2294 2295 2296 2297 2298 2299 2300 2301 2302
	}
	return 0;
}
#else
static int pseries_get_cpu_char(struct kvm_ppc_cpu_char *cp)
{
	return -ENOTTY;
}
#endif

static inline bool have_fw_feat(struct device_node *fw_features,
				const char *state, const char *name)
{
	struct device_node *np;
	bool r = false;

	np = of_get_child_by_name(fw_features, name);
	if (np) {
		r = of_property_read_bool(np, state);
		of_node_put(np);
	}
	return r;
}

static int kvmppc_get_cpu_char(struct kvm_ppc_cpu_char *cp)
{
	struct device_node *np, *fw_features;
	int r;

	memset(cp, 0, sizeof(*cp));
	r = pseries_get_cpu_char(cp);
	if (r != -ENOTTY)
		return r;

	np = of_find_node_by_name(NULL, "ibm,opal");
	if (np) {
		fw_features = of_get_child_by_name(np, "fw-features");
		of_node_put(np);
		if (!fw_features)
			return 0;
		if (have_fw_feat(fw_features, "enabled",
				 "inst-spec-barrier-ori31,31,0"))
			cp->character |= KVM_PPC_CPU_CHAR_SPEC_BAR_ORI31;
		if (have_fw_feat(fw_features, "enabled",
				 "fw-bcctrl-serialized"))
			cp->character |= KVM_PPC_CPU_CHAR_BCCTRL_SERIALISED;
		if (have_fw_feat(fw_features, "enabled",
				 "inst-l1d-flush-ori30,30,0"))
			cp->character |= KVM_PPC_CPU_CHAR_L1D_FLUSH_ORI30;
		if (have_fw_feat(fw_features, "enabled",
				 "inst-l1d-flush-trig2"))
			cp->character |= KVM_PPC_CPU_CHAR_L1D_FLUSH_TRIG2;
		if (have_fw_feat(fw_features, "enabled",
				 "fw-l1d-thread-split"))
			cp->character |= KVM_PPC_CPU_CHAR_L1D_THREAD_PRIV;
		if (have_fw_feat(fw_features, "enabled",
				 "fw-count-cache-disabled"))
			cp->character |= KVM_PPC_CPU_CHAR_COUNT_CACHE_DIS;
2303 2304 2305
		if (have_fw_feat(fw_features, "enabled",
				 "fw-count-cache-flush-bcctr2,0,0"))
			cp->character |= KVM_PPC_CPU_CHAR_BCCTR_FLUSH_ASSIST;
2306 2307 2308 2309 2310
		cp->character_mask = KVM_PPC_CPU_CHAR_SPEC_BAR_ORI31 |
			KVM_PPC_CPU_CHAR_BCCTRL_SERIALISED |
			KVM_PPC_CPU_CHAR_L1D_FLUSH_ORI30 |
			KVM_PPC_CPU_CHAR_L1D_FLUSH_TRIG2 |
			KVM_PPC_CPU_CHAR_L1D_THREAD_PRIV |
2311 2312
			KVM_PPC_CPU_CHAR_COUNT_CACHE_DIS |
			KVM_PPC_CPU_CHAR_BCCTR_FLUSH_ASSIST;
2313 2314 2315 2316 2317 2318 2319 2320 2321 2322

		if (have_fw_feat(fw_features, "enabled",
				 "speculation-policy-favor-security"))
			cp->behaviour |= KVM_PPC_CPU_BEHAV_FAVOUR_SECURITY;
		if (!have_fw_feat(fw_features, "disabled",
				  "needs-l1d-flush-msr-pr-0-to-1"))
			cp->behaviour |= KVM_PPC_CPU_BEHAV_L1D_FLUSH_PR;
		if (!have_fw_feat(fw_features, "disabled",
				  "needs-spec-barrier-for-bound-checks"))
			cp->behaviour |= KVM_PPC_CPU_BEHAV_BNDS_CHK_SPEC_BAR;
2323 2324 2325
		if (have_fw_feat(fw_features, "enabled",
				 "needs-count-cache-flush-on-context-switch"))
			cp->behaviour |= KVM_PPC_CPU_BEHAV_FLUSH_COUNT_CACHE;
2326 2327
		cp->behaviour_mask = KVM_PPC_CPU_BEHAV_FAVOUR_SECURITY |
			KVM_PPC_CPU_BEHAV_L1D_FLUSH_PR |
2328 2329
			KVM_PPC_CPU_BEHAV_BNDS_CHK_SPEC_BAR |
			KVM_PPC_CPU_BEHAV_FLUSH_COUNT_CACHE;
2330 2331 2332 2333 2334 2335 2336 2337

		of_node_put(fw_features);
	}

	return 0;
}
#endif

2338 2339 2340
long kvm_arch_vm_ioctl(struct file *filp,
                       unsigned int ioctl, unsigned long arg)
{
2341
	struct kvm *kvm __maybe_unused = filp->private_data;
2342
	void __user *argp = (void __user *)arg;
2343 2344 2345
	long r;

	switch (ioctl) {
2346 2347
	case KVM_PPC_GET_PVINFO: {
		struct kvm_ppc_pvinfo pvinfo;
2348
		memset(&pvinfo, 0, sizeof(pvinfo));
2349 2350 2351 2352 2353 2354 2355 2356
		r = kvm_vm_ioctl_get_pvinfo(&pvinfo);
		if (copy_to_user(argp, &pvinfo, sizeof(pvinfo))) {
			r = -EFAULT;
			goto out;
		}

		break;
	}
2357
#ifdef CONFIG_SPAPR_TCE_IOMMU
2358 2359 2360 2361 2362 2363 2364 2365 2366 2367 2368 2369 2370
	case KVM_CREATE_SPAPR_TCE_64: {
		struct kvm_create_spapr_tce_64 create_tce_64;

		r = -EFAULT;
		if (copy_from_user(&create_tce_64, argp, sizeof(create_tce_64)))
			goto out;
		if (create_tce_64.flags) {
			r = -EINVAL;
			goto out;
		}
		r = kvm_vm_ioctl_create_spapr_tce(kvm, &create_tce_64);
		goto out;
	}
2371 2372
	case KVM_CREATE_SPAPR_TCE: {
		struct kvm_create_spapr_tce create_tce;
2373
		struct kvm_create_spapr_tce_64 create_tce_64;
2374 2375 2376 2377

		r = -EFAULT;
		if (copy_from_user(&create_tce, argp, sizeof(create_tce)))
			goto out;
2378 2379 2380 2381 2382 2383 2384 2385

		create_tce_64.liobn = create_tce.liobn;
		create_tce_64.page_shift = IOMMU_PAGE_SHIFT_4K;
		create_tce_64.offset = 0;
		create_tce_64.size = create_tce.window_size >>
				IOMMU_PAGE_SHIFT_4K;
		create_tce_64.flags = 0;
		r = kvm_vm_ioctl_create_spapr_tce(kvm, &create_tce_64);
2386 2387
		goto out;
	}
2388 2389
#endif
#ifdef CONFIG_PPC_BOOK3S_64
2390 2391
	case KVM_PPC_GET_SMMU_INFO: {
		struct kvm_ppc_smmu_info info;
2392
		struct kvm *kvm = filp->private_data;
2393 2394

		memset(&info, 0, sizeof(info));
2395
		r = kvm->arch.kvm_ops->get_smmu_info(kvm, &info);
2396 2397 2398 2399
		if (r >= 0 && copy_to_user(argp, &info, sizeof(info)))
			r = -EFAULT;
		break;
	}
2400 2401 2402 2403 2404 2405
	case KVM_PPC_RTAS_DEFINE_TOKEN: {
		struct kvm *kvm = filp->private_data;

		r = kvm_vm_ioctl_rtas_define_token(kvm, argp);
		break;
	}
2406 2407 2408 2409 2410 2411 2412 2413 2414 2415 2416 2417 2418 2419 2420 2421 2422 2423 2424 2425 2426 2427 2428 2429 2430
	case KVM_PPC_CONFIGURE_V3_MMU: {
		struct kvm *kvm = filp->private_data;
		struct kvm_ppc_mmuv3_cfg cfg;

		r = -EINVAL;
		if (!kvm->arch.kvm_ops->configure_mmu)
			goto out;
		r = -EFAULT;
		if (copy_from_user(&cfg, argp, sizeof(cfg)))
			goto out;
		r = kvm->arch.kvm_ops->configure_mmu(kvm, &cfg);
		break;
	}
	case KVM_PPC_GET_RMMU_INFO: {
		struct kvm *kvm = filp->private_data;
		struct kvm_ppc_rmmu_info info;

		r = -EINVAL;
		if (!kvm->arch.kvm_ops->get_rmmu_info)
			goto out;
		r = kvm->arch.kvm_ops->get_rmmu_info(kvm, &info);
		if (r >= 0 && copy_to_user(argp, &info, sizeof(info)))
			r = -EFAULT;
		break;
	}
2431 2432 2433 2434 2435 2436 2437 2438
	case KVM_PPC_GET_CPU_CHAR: {
		struct kvm_ppc_cpu_char cpuchar;

		r = kvmppc_get_cpu_char(&cpuchar);
		if (r >= 0 && copy_to_user(argp, &cpuchar, sizeof(cpuchar)))
			r = -EFAULT;
		break;
	}
2439 2440 2441 2442 2443 2444 2445 2446 2447 2448
	case KVM_PPC_SVM_OFF: {
		struct kvm *kvm = filp->private_data;

		r = 0;
		if (!kvm->arch.kvm_ops->svm_off)
			goto out;

		r = kvm->arch.kvm_ops->svm_off(kvm);
		break;
	}
2449 2450 2451 2452
	default: {
		struct kvm *kvm = filp->private_data;
		r = kvm->arch.kvm_ops->arch_vm_ioctl(filp, ioctl, arg);
	}
2453
#else /* CONFIG_PPC_BOOK3S_64 */
2454
	default:
2455
		r = -ENOTTY;
2456
#endif
2457
	}
2458
out:
2459 2460 2461
	return r;
}

2462 2463 2464 2465 2466 2467 2468 2469 2470 2471 2472 2473 2474 2475 2476 2477 2478
static unsigned long lpid_inuse[BITS_TO_LONGS(KVMPPC_NR_LPIDS)];
static unsigned long nr_lpids;

long kvmppc_alloc_lpid(void)
{
	long lpid;

	do {
		lpid = find_first_zero_bit(lpid_inuse, KVMPPC_NR_LPIDS);
		if (lpid >= nr_lpids) {
			pr_err("%s: No LPIDs free\n", __func__);
			return -ENOMEM;
		}
	} while (test_and_set_bit(lpid, lpid_inuse));

	return lpid;
}
2479
EXPORT_SYMBOL_GPL(kvmppc_alloc_lpid);
2480 2481 2482 2483 2484

void kvmppc_claim_lpid(long lpid)
{
	set_bit(lpid, lpid_inuse);
}
2485
EXPORT_SYMBOL_GPL(kvmppc_claim_lpid);
2486 2487 2488 2489 2490

void kvmppc_free_lpid(long lpid)
{
	clear_bit(lpid, lpid_inuse);
}
2491
EXPORT_SYMBOL_GPL(kvmppc_free_lpid);
2492 2493 2494 2495 2496 2497

void kvmppc_init_lpid(unsigned long nr_lpids_param)
{
	nr_lpids = min_t(unsigned long, KVMPPC_NR_LPIDS, nr_lpids_param);
	memset(lpid_inuse, 0, sizeof(lpid_inuse));
}
2498
EXPORT_SYMBOL_GPL(kvmppc_init_lpid);
2499

2500 2501 2502 2503 2504
int kvm_arch_init(void *opaque)
{
	return 0;
}

2505
EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_ppc_instr);