powerpc.c 49.9 KB
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/*
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License, version 2, as
 * published by the Free Software Foundation.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
 *
 * 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/tlbflush.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 "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_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;
	int r;

	vcpu->stat.st++;

	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;
	int rc;

	vcpu->stat.ld++;

	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;
}

void kvm_arch_check_processor_compat(void *rtn)
{
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	*(int *)rtn = 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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bool kvm_arch_has_vcpu_debugfs(void)
{
	return false;
}

int kvm_arch_create_vcpu_debugfs(struct kvm_vcpu *vcpu)
{
	return 0;
}

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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)
		kvm_arch_vcpu_free(vcpu);

	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_ENABLE_CAP_VM:
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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;
	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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		/* fallthrough */
	case KVM_CAP_SPAPR_TCE_VFIO:
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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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	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));
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		break;
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#endif
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	case KVM_CAP_SYNC_MMU:
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#ifdef CONFIG_KVM_BOOK3S_HV_POSSIBLE
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		r = hv_enabled;
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#elif defined(KVM_ARCH_WANT_MMU_NOTIFIER)
		r = 1;
#else
		r = 0;
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#endif
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		break;
#ifdef CONFIG_KVM_BOOK3S_HV_POSSIBLE
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	case KVM_CAP_PPC_HTAB_FD:
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		r = hv_enabled;
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		break;
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#endif
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	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.
		 */
622
		if (hv_enabled)
623 624 625
			r = num_present_cpus();
		else
			r = num_online_cpus();
626
		break;
627 628 629
	case KVM_CAP_NR_MEMSLOTS:
		r = KVM_USER_MEM_SLOTS;
		break;
630 631 632
	case KVM_CAP_MAX_VCPUS:
		r = KVM_MAX_VCPUS;
		break;
633 634 635 636
#ifdef CONFIG_PPC_BOOK3S_64
	case KVM_CAP_PPC_GET_SMMU_INFO:
		r = 1;
		break;
637 638 639
	case KVM_CAP_SPAPR_MULTITCE:
		r = 1;
		break;
640
	case KVM_CAP_SPAPR_RESIZE_HPT:
641
		r = !!hv_enabled;
642
		break;
643 644 645 646 647
#endif
#ifdef CONFIG_KVM_BOOK3S_HV_POSSIBLE
	case KVM_CAP_PPC_FWNMI:
		r = hv_enabled;
		break;
648
#endif
649
#ifdef CONFIG_PPC_TRANSACTIONAL_MEM
650
	case KVM_CAP_PPC_HTM:
651
		r = hv_enabled &&
652 653
		    (!!(cur_cpu_spec->cpu_user_features2 & PPC_FEATURE2_HTM) ||
		     cpu_has_feature(CPU_FTR_P9_TM_HV_ASSIST));
654
		break;
655
#endif
656 657 658 659 660 661 662 663 664 665 666 667 668 669
	default:
		r = 0;
		break;
	}
	return r;

}

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

670
void kvm_arch_free_memslot(struct kvm *kvm, struct kvm_memory_slot *free,
671 672
			   struct kvm_memory_slot *dont)
{
673
	kvmppc_core_free_memslot(kvm, free, dont);
674 675
}

676 677
int kvm_arch_create_memslot(struct kvm *kvm, struct kvm_memory_slot *slot,
			    unsigned long npages)
678
{
679
	return kvmppc_core_create_memslot(kvm, slot, npages);
680 681
}

682
int kvm_arch_prepare_memory_region(struct kvm *kvm,
683
				   struct kvm_memory_slot *memslot,
684
				   const struct kvm_userspace_memory_region *mem,
685
				   enum kvm_mr_change change)
686
{
687
	return kvmppc_core_prepare_memory_region(kvm, memslot, mem);
688 689
}

690
void kvm_arch_commit_memory_region(struct kvm *kvm,
691
				   const struct kvm_userspace_memory_region *mem,
692
				   const struct kvm_memory_slot *old,
693
				   const struct kvm_memory_slot *new,
694
				   enum kvm_mr_change change)
695
{
696
	kvmppc_core_commit_memory_region(kvm, mem, old, new);
697 698
}

699 700
void kvm_arch_flush_shadow_memslot(struct kvm *kvm,
				   struct kvm_memory_slot *slot)
701
{
702
	kvmppc_core_flush_memslot(kvm, slot);
703 704
}

705 706
struct kvm_vcpu *kvm_arch_vcpu_create(struct kvm *kvm, unsigned int id)
{
707 708
	struct kvm_vcpu *vcpu;
	vcpu = kvmppc_core_vcpu_create(kvm, id);
709 710
	if (!IS_ERR(vcpu)) {
		vcpu->arch.wqp = &vcpu->wq;
711
		kvmppc_create_vcpu_debugfs(vcpu, id);
712
	}
713
	return vcpu;
714 715
}

716
void kvm_arch_vcpu_postcreate(struct kvm_vcpu *vcpu)
717 718 719
{
}

720 721
void kvm_arch_vcpu_free(struct kvm_vcpu *vcpu)
{
722 723 724
	/* Make sure we're not using the vcpu anymore */
	hrtimer_cancel(&vcpu->arch.dec_timer);

725
	kvmppc_remove_vcpu_debugfs(vcpu);
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	switch (vcpu->arch.irq_type) {
	case KVMPPC_IRQ_MPIC:
		kvmppc_mpic_disconnect_vcpu(vcpu->arch.mpic, vcpu);
		break;
731
	case KVMPPC_IRQ_XICS:
732 733 734 735
		if (xive_enabled())
			kvmppc_xive_cleanup_vcpu(vcpu);
		else
			kvmppc_xics_free_icp(vcpu);
736
		break;
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737 738
	}

739
	kvmppc_core_vcpu_free(vcpu);
740 741 742 743 744 745 746 747 748
}

void kvm_arch_vcpu_destroy(struct kvm_vcpu *vcpu)
{
	kvm_arch_vcpu_free(vcpu);
}

int kvm_cpu_has_pending_timer(struct kvm_vcpu *vcpu)
{
749
	return kvmppc_core_pending_dec(vcpu);
750 751
}

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752
static enum hrtimer_restart kvmppc_decrementer_wakeup(struct hrtimer *timer)
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{
	struct kvm_vcpu *vcpu;

	vcpu = container_of(timer, struct kvm_vcpu, arch.dec_timer);
757
	kvmppc_decrementer_func(vcpu);
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	return HRTIMER_NORESTART;
}

762 763
int kvm_arch_vcpu_init(struct kvm_vcpu *vcpu)
{
764 765
	int ret;

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	hrtimer_init(&vcpu->arch.dec_timer, CLOCK_REALTIME, HRTIMER_MODE_ABS);
	vcpu->arch.dec_timer.function = kvmppc_decrementer_wakeup;
768
	vcpu->arch.dec_expires = get_tb();
769

770 771 772
#ifdef CONFIG_KVM_EXIT_TIMING
	mutex_init(&vcpu->arch.exit_timing_lock);
#endif
773 774
	ret = kvmppc_subarch_vcpu_init(vcpu);
	return ret;
775 776 777 778
}

void kvm_arch_vcpu_uninit(struct kvm_vcpu *vcpu)
{
779
	kvmppc_mmu_destroy(vcpu);
780
	kvmppc_subarch_vcpu_uninit(vcpu);
781 782 783 784
}

void kvm_arch_vcpu_load(struct kvm_vcpu *vcpu, int cpu)
{
785 786 787 788 789 790 791 792 793 794
#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
795
	kvmppc_core_vcpu_load(vcpu, cpu);
796 797 798 799
}

void kvm_arch_vcpu_put(struct kvm_vcpu *vcpu)
{
800
	kvmppc_core_vcpu_put(vcpu);
801 802 803
#ifdef CONFIG_BOOKE
	vcpu->arch.vrsave = mfspr(SPRN_VRSAVE);
#endif
804 805
}

806 807 808 809 810 811 812 813 814 815 816 817 818 819 820 821 822 823 824 825 826 827 828 829 830 831 832 833 834 835 836 837 838 839 840 841
/*
 * 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);
}

842 843 844 845 846 847 848 849 850 851 852 853 854 855 856 857 858 859 860 861 862 863 864 865 866 867 868 869 870 871 872 873 874 875 876 877 878 879 880 881 882 883 884 885 886 887 888 889 890 891 892 893 894 895 896 897 898 899 900 901 902 903 904 905 906 907 908 909 910 911 912 913 914 915 916 917 918 919 920 921 922 923 924 925 926 927 928 929 930 931 932 933 934
#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;

	if (vcpu->arch.mmio_vsx_tx_sx_enabled) {
		val.vval = VCPU_VSX_VR(vcpu, index);
		val.vsxval[offset] = gpr;
		VCPU_VSX_VR(vcpu, index) = val.vval;
	} 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;

	if (vcpu->arch.mmio_vsx_tx_sx_enabled) {
		val.vval = VCPU_VSX_VR(vcpu, index);
		val.vsxval[0] = gpr;
		val.vsxval[1] = gpr;
		VCPU_VSX_VR(vcpu, index) = val.vval;
	} else {
		VCPU_VSX_FPR(vcpu, index, 0) = gpr;
		VCPU_VSX_FPR(vcpu, index, 1) = gpr;
	}
}

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;

	if (vcpu->arch.mmio_vsx_tx_sx_enabled) {
		val.vval = VCPU_VSX_VR(vcpu, index);
		val.vsx32val[offset] = gpr32;
		VCPU_VSX_VR(vcpu, index) = val.vval;
	} 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 */

935 936 937 938 939 940 941 942 943 944 945 946 947 948 949 950 951 952 953 954 955 956 957 958 959 960 961 962
#ifdef CONFIG_ALTIVEC
static inline void kvmppc_set_vmx_dword(struct kvm_vcpu *vcpu,
		u64 gpr)
{
	int index = vcpu->arch.io_gpr & KVM_MMIO_REG_MASK;
	u32 hi, lo;
	u32 di;

#ifdef __BIG_ENDIAN
	hi = gpr >> 32;
	lo = gpr & 0xffffffff;
#else
	lo = gpr >> 32;
	hi = gpr & 0xffffffff;
#endif

	di = 2 - vcpu->arch.mmio_vmx_copy_nums;		/* doubleword index */
	if (di > 1)
		return;

	if (vcpu->arch.mmio_host_swabbed)
		di = 1 - di;

	VCPU_VSX_VR(vcpu, index).u[di * 2] = hi;
	VCPU_VSX_VR(vcpu, index).u[di * 2 + 1] = lo;
}
#endif /* CONFIG_ALTIVEC */

963 964 965 966 967 968 969 970 971 972 973 974 975 976 977 978 979 980 981 982 983 984 985 986 987 988 989 990 991 992
#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 */

993 994 995
static void kvmppc_complete_mmio_load(struct kvm_vcpu *vcpu,
                                      struct kvm_run *run)
{
996
	u64 uninitialized_var(gpr);
997

998
	if (run->mmio.len > sizeof(gpr)) {
999 1000 1001 1002
		printk(KERN_ERR "bad MMIO length: %d\n", run->mmio.len);
		return;
	}

1003
	if (!vcpu->arch.mmio_host_swabbed) {
1004
		switch (run->mmio.len) {
1005
		case 8: gpr = *(u64 *)run->mmio.data; break;
1006 1007 1008
		case 4: gpr = *(u32 *)run->mmio.data; break;
		case 2: gpr = *(u16 *)run->mmio.data; break;
		case 1: gpr = *(u8 *)run->mmio.data; break;
1009 1010 1011
		}
	} else {
		switch (run->mmio.len) {
1012 1013 1014
		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;
1015
		case 1: gpr = *(u8 *)run->mmio.data; break;
1016 1017
		}
	}
1018

1019 1020 1021 1022
	/* conversion between single and double precision */
	if ((vcpu->arch.mmio_sp64_extend) && (run->mmio.len == 4))
		gpr = sp_to_dp(gpr);

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Alexander Graf 已提交
1023 1024 1025 1026 1027 1028 1029 1030 1031 1032 1033 1034 1035 1036 1037 1038
	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;
		}
	}

1039 1040
	switch (vcpu->arch.io_gpr & KVM_MMIO_REG_EXT_MASK) {
	case KVM_MMIO_REG_GPR:
1041 1042
		kvmppc_set_gpr(vcpu, vcpu->arch.io_gpr, gpr);
		break;
1043
	case KVM_MMIO_REG_FPR:
1044
		VCPU_FPR(vcpu, vcpu->arch.io_gpr & KVM_MMIO_REG_MASK) = gpr;
1045
		break;
1046
#ifdef CONFIG_PPC_BOOK3S
1047 1048
	case KVM_MMIO_REG_QPR:
		vcpu->arch.qpr[vcpu->arch.io_gpr & KVM_MMIO_REG_MASK] = gpr;
1049
		break;
1050
	case KVM_MMIO_REG_FQPR:
1051
		VCPU_FPR(vcpu, vcpu->arch.io_gpr & KVM_MMIO_REG_MASK) = gpr;
1052
		vcpu->arch.qpr[vcpu->arch.io_gpr & KVM_MMIO_REG_MASK] = gpr;
1053
		break;
1054 1055 1056 1057 1058 1059 1060 1061 1062 1063 1064
#endif
#ifdef CONFIG_VSX
	case KVM_MMIO_REG_VSX:
		if (vcpu->arch.mmio_vsx_copy_type == KVMPPC_VSX_COPY_DWORD)
			kvmppc_set_vsr_dword(vcpu, gpr);
		else if (vcpu->arch.mmio_vsx_copy_type == KVMPPC_VSX_COPY_WORD)
			kvmppc_set_vsr_word(vcpu, gpr);
		else if (vcpu->arch.mmio_vsx_copy_type ==
				KVMPPC_VSX_COPY_DWORD_LOAD_DUMP)
			kvmppc_set_vsr_dword_dump(vcpu, gpr);
		break;
1065 1066 1067 1068 1069
#endif
#ifdef CONFIG_ALTIVEC
	case KVM_MMIO_REG_VMX:
		kvmppc_set_vmx_dword(vcpu, gpr);
		break;
1070
#endif
1071 1072 1073
	default:
		BUG();
	}
1074 1075
}

1076 1077 1078
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)
1079
{
1080
	int idx, ret;
1081
	bool host_swabbed;
1082

1083
	/* Pity C doesn't have a logical XOR operator */
1084
	if (kvmppc_need_byteswap(vcpu)) {
1085
		host_swabbed = is_default_endian;
1086
	} else {
1087
		host_swabbed = !is_default_endian;
1088
	}
1089

1090 1091 1092 1093 1094 1095 1096 1097 1098 1099
	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;
1100
	vcpu->arch.mmio_host_swabbed = host_swabbed;
1101 1102
	vcpu->mmio_needed = 1;
	vcpu->mmio_is_write = 0;
1103
	vcpu->arch.mmio_sign_extend = sign_extend;
1104

1105 1106
	idx = srcu_read_lock(&vcpu->kvm->srcu);

1107
	ret = kvm_io_bus_read(vcpu, KVM_MMIO_BUS, run->mmio.phys_addr,
1108 1109 1110 1111 1112
			      bytes, &run->mmio.data);

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

	if (!ret) {
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1113 1114 1115 1116 1117
		kvmppc_complete_mmio_load(vcpu, run);
		vcpu->mmio_needed = 0;
		return EMULATE_DONE;
	}

1118 1119
	return EMULATE_DO_MMIO;
}
1120 1121 1122 1123 1124 1125 1126

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);
}
1127
EXPORT_SYMBOL_GPL(kvmppc_handle_load);
1128

A
Alexander Graf 已提交
1129 1130
/* Same as above, but sign extends */
int kvmppc_handle_loads(struct kvm_run *run, struct kvm_vcpu *vcpu,
1131 1132
			unsigned int rt, unsigned int bytes,
			int is_default_endian)
A
Alexander Graf 已提交
1133
{
1134
	return __kvmppc_handle_load(run, vcpu, rt, bytes, is_default_endian, 1);
A
Alexander Graf 已提交
1135 1136
}

1137 1138 1139 1140 1141 1142 1143
#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;

1144 1145
	/* Currently, mmio_vsx_copy_nums only allowed to be 4 or less */
	if (vcpu->arch.mmio_vsx_copy_nums > 4)
1146 1147 1148 1149 1150 1151 1152 1153 1154 1155 1156 1157 1158 1159 1160 1161 1162 1163
		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 */

1164
int kvmppc_handle_store(struct kvm_run *run, struct kvm_vcpu *vcpu,
1165
			u64 val, unsigned int bytes, int is_default_endian)
1166 1167
{
	void *data = run->mmio.data;
1168
	int idx, ret;
1169
	bool host_swabbed;
1170

1171
	/* Pity C doesn't have a logical XOR operator */
1172
	if (kvmppc_need_byteswap(vcpu)) {
1173
		host_swabbed = is_default_endian;
1174
	} else {
1175
		host_swabbed = !is_default_endian;
1176
	}
1177 1178 1179 1180 1181 1182 1183 1184 1185 1186 1187 1188

	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;

1189 1190 1191
	if ((vcpu->arch.mmio_sp64_extend) && (bytes == 4))
		val = dp_to_sp(val);

1192
	/* Store the value at the lowest bytes in 'data'. */
1193
	if (!host_swabbed) {
1194
		switch (bytes) {
1195
		case 8: *(u64 *)data = val; break;
1196 1197 1198 1199 1200 1201
		case 4: *(u32 *)data = val; break;
		case 2: *(u16 *)data = val; break;
		case 1: *(u8  *)data = val; break;
		}
	} else {
		switch (bytes) {
1202 1203 1204 1205
		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;
1206 1207 1208
		}
	}

1209 1210
	idx = srcu_read_lock(&vcpu->kvm->srcu);

1211
	ret = kvm_io_bus_write(vcpu, KVM_MMIO_BUS, run->mmio.phys_addr,
1212 1213 1214 1215 1216
			       bytes, &run->mmio.data);

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

	if (!ret) {
A
Alexander Graf 已提交
1217 1218 1219 1220
		vcpu->mmio_needed = 0;
		return EMULATE_DONE;
	}

1221 1222
	return EMULATE_DO_MMIO;
}
1223
EXPORT_SYMBOL_GPL(kvmppc_handle_store);
1224

1225 1226 1227 1228 1229 1230 1231 1232 1233 1234 1235 1236 1237 1238 1239 1240 1241 1242 1243 1244 1245 1246 1247 1248 1249 1250 1251 1252 1253 1254 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
#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;
	int copy_type = vcpu->arch.mmio_vsx_copy_type;
	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;
		}

		if (!vcpu->arch.mmio_vsx_tx_sx_enabled) {
			*val = VCPU_VSX_FPR(vcpu, rs, vsx_offset);
		} else {
			reg.vval = VCPU_VSX_VR(vcpu, rs);
			*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;
		}

		if (!vcpu->arch.mmio_vsx_tx_sx_enabled) {
			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 {
			reg.vval = VCPU_VSX_VR(vcpu, rs);
			*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;

1288 1289
	/* Currently, mmio_vsx_copy_nums only allowed to be 4 or less */
	if (vcpu->arch.mmio_vsx_copy_nums > 4)
1290 1291 1292 1293 1294 1295 1296 1297 1298 1299 1300 1301 1302 1303 1304 1305 1306 1307 1308 1309 1310 1311 1312 1313 1314 1315 1316 1317 1318 1319 1320 1321 1322 1323 1324 1325 1326 1327 1328 1329 1330 1331 1332 1333 1334 1335 1336 1337 1338 1339 1340 1341 1342 1343 1344 1345
		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 */

1346 1347 1348 1349 1350
#ifdef CONFIG_ALTIVEC
/* handle quadword load access in two halves */
int kvmppc_handle_load128_by2x64(struct kvm_run *run, struct kvm_vcpu *vcpu,
		unsigned int rt, int is_default_endian)
{
1351
	enum emulation_result emulated = EMULATE_DONE;
1352 1353 1354 1355 1356 1357 1358 1359 1360 1361 1362 1363 1364 1365 1366 1367 1368 1369 1370 1371 1372 1373 1374 1375 1376

	while (vcpu->arch.mmio_vmx_copy_nums) {
		emulated = __kvmppc_handle_load(run, vcpu, rt, 8,
				is_default_endian, 0);

		if (emulated != EMULATE_DONE)
			break;

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

	return emulated;
}

static inline int kvmppc_get_vmx_data(struct kvm_vcpu *vcpu, int rs, u64 *val)
{
	vector128 vrs = VCPU_VSX_VR(vcpu, rs);
	u32 di;
	u64 w0, w1;

	di = 2 - vcpu->arch.mmio_vmx_copy_nums;		/* doubleword index */
	if (di > 1)
		return -1;

1377
	if (kvmppc_need_byteswap(vcpu))
1378 1379 1380 1381 1382 1383 1384 1385 1386 1387 1388 1389 1390 1391 1392 1393 1394 1395 1396 1397 1398 1399 1400 1401 1402 1403 1404 1405 1406 1407 1408 1409 1410 1411 1412 1413 1414 1415 1416 1417 1418 1419 1420 1421 1422 1423 1424 1425 1426 1427 1428 1429 1430 1431 1432 1433 1434 1435 1436 1437 1438 1439 1440 1441 1442 1443 1444 1445 1446 1447 1448 1449 1450
		di = 1 - di;

	w0 = vrs.u[di * 2];
	w1 = vrs.u[di * 2 + 1];

#ifdef __BIG_ENDIAN
	*val = (w0 << 32) | w1;
#else
	*val = (w1 << 32) | w0;
#endif
	return 0;
}

/* handle quadword store in two halves */
int kvmppc_handle_store128_by2x64(struct kvm_run *run, struct kvm_vcpu *vcpu,
		unsigned int rs, int is_default_endian)
{
	u64 val = 0;
	enum emulation_result emulated = EMULATE_DONE;

	vcpu->arch.io_gpr = rs;

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

		emulated = kvmppc_handle_store(run, vcpu, val, 8,
				is_default_endian);
		if (emulated != EMULATE_DONE)
			break;

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

	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) {
		emulated = kvmppc_handle_load128_by2x64(run, vcpu,
				vcpu->arch.io_gpr, 1);
	} else {
		emulated = kvmppc_handle_store128_by2x64(run, vcpu,
				vcpu->arch.io_gpr, 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 (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 */

1451 1452 1453 1454 1455 1456 1457 1458 1459 1460 1461 1462 1463 1464
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) {
1465 1466 1467 1468 1469 1470
#ifdef CONFIG_ALTIVEC
		case KVM_REG_PPC_VR0 ... KVM_REG_PPC_VR31:
			if (!cpu_has_feature(CPU_FTR_ALTIVEC)) {
				r = -ENXIO;
				break;
			}
1471
			val.vval = vcpu->arch.vr.vr[reg->id - KVM_REG_PPC_VR0];
1472 1473 1474 1475 1476 1477
			break;
		case KVM_REG_PPC_VSCR:
			if (!cpu_has_feature(CPU_FTR_ALTIVEC)) {
				r = -ENXIO;
				break;
			}
1478
			val = get_reg_val(reg->id, vcpu->arch.vr.vscr.u[3]);
1479 1480
			break;
		case KVM_REG_PPC_VRSAVE:
1481
			val = get_reg_val(reg->id, vcpu->arch.vrsave);
1482 1483
			break;
#endif /* CONFIG_ALTIVEC */
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
		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) {
1516 1517 1518 1519 1520 1521
#ifdef CONFIG_ALTIVEC
		case KVM_REG_PPC_VR0 ... KVM_REG_PPC_VR31:
			if (!cpu_has_feature(CPU_FTR_ALTIVEC)) {
				r = -ENXIO;
				break;
			}
1522
			vcpu->arch.vr.vr[reg->id - KVM_REG_PPC_VR0] = val.vval;
1523 1524 1525 1526 1527 1528
			break;
		case KVM_REG_PPC_VSCR:
			if (!cpu_has_feature(CPU_FTR_ALTIVEC)) {
				r = -ENXIO;
				break;
			}
1529
			vcpu->arch.vr.vscr.u[3] = set_reg_val(reg->id, val);
1530 1531
			break;
		case KVM_REG_PPC_VRSAVE:
1532 1533 1534 1535 1536
			if (!cpu_has_feature(CPU_FTR_ALTIVEC)) {
				r = -ENXIO;
				break;
			}
			vcpu->arch.vrsave = set_reg_val(reg->id, val);
1537 1538
			break;
#endif /* CONFIG_ALTIVEC */
1539 1540 1541 1542 1543 1544 1545 1546 1547
		default:
			r = -EINVAL;
			break;
		}
	}

	return r;
}

1548 1549 1550 1551
int kvm_arch_vcpu_ioctl_run(struct kvm_vcpu *vcpu, struct kvm_run *run)
{
	int r;

1552 1553
	vcpu_load(vcpu);

1554
	if (vcpu->mmio_needed) {
1555
		vcpu->mmio_needed = 0;
1556 1557
		if (!vcpu->mmio_is_write)
			kvmppc_complete_mmio_load(vcpu, run);
1558 1559 1560 1561 1562 1563 1564 1565 1566 1567
#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;
1568
				goto out;
1569 1570
			}
		}
1571 1572 1573 1574 1575 1576 1577 1578 1579
#endif
#ifdef CONFIG_ALTIVEC
		if (vcpu->arch.mmio_vmx_copy_nums > 0)
			vcpu->arch.mmio_vmx_copy_nums--;

		if (vcpu->arch.mmio_vmx_copy_nums > 0) {
			r = kvmppc_emulate_mmio_vmx_loadstore(vcpu, run);
			if (r == RESUME_HOST) {
				vcpu->mmio_needed = 1;
1580
				goto out;
1581 1582
			}
		}
1583
#endif
1584 1585 1586 1587 1588 1589 1590
	} 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;
1591 1592 1593 1594 1595 1596 1597
	} 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;
1598 1599 1600 1601 1602
#ifdef CONFIG_BOOKE
	} else if (vcpu->arch.epr_needed) {
		kvmppc_set_epr(vcpu, run->epr.epr);
		vcpu->arch.epr_needed = 0;
#endif
1603 1604
	}

1605
	kvm_sigset_activate(vcpu);
1606

1607 1608 1609 1610
	if (run->immediate_exit)
		r = -EINTR;
	else
		r = kvmppc_vcpu_run(run, vcpu);
1611

1612
	kvm_sigset_deactivate(vcpu);
1613

1614
#ifdef CONFIG_ALTIVEC
1615
out:
1616
#endif
1617
	vcpu_put(vcpu);
1618 1619 1620 1621 1622
	return r;
}

int kvm_vcpu_ioctl_interrupt(struct kvm_vcpu *vcpu, struct kvm_interrupt *irq)
{
1623
	if (irq->irq == KVM_INTERRUPT_UNSET) {
1624
		kvmppc_core_dequeue_external(vcpu);
1625 1626 1627 1628
		return 0;
	}

	kvmppc_core_queue_external(vcpu, irq);
1629

1630
	kvm_vcpu_kick(vcpu);
1631

1632 1633 1634
	return 0;
}

1635 1636 1637 1638 1639 1640 1641 1642 1643
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) {
1644 1645 1646 1647
	case KVM_CAP_PPC_OSI:
		r = 0;
		vcpu->arch.osi_enabled = true;
		break;
1648 1649 1650 1651
	case KVM_CAP_PPC_PAPR:
		r = 0;
		vcpu->arch.papr_enabled = true;
		break;
1652 1653
	case KVM_CAP_PPC_EPR:
		r = 0;
1654 1655 1656 1657
		if (cap->args[0])
			vcpu->arch.epr_flags |= KVMPPC_EPR_USER;
		else
			vcpu->arch.epr_flags &= ~KVMPPC_EPR_USER;
1658
		break;
1659 1660 1661 1662 1663 1664
#ifdef CONFIG_BOOKE
	case KVM_CAP_PPC_BOOKE_WATCHDOG:
		r = 0;
		vcpu->arch.watchdog_enabled = true;
		break;
#endif
1665
#if defined(CONFIG_KVM_E500V2) || defined(CONFIG_KVM_E500MC)
S
Scott Wood 已提交
1666 1667 1668 1669 1670 1671 1672 1673 1674 1675
	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
1676 1677 1678 1679
	}
#endif
#ifdef CONFIG_KVM_MPIC
	case KVM_CAP_IRQ_MPIC: {
A
Al Viro 已提交
1680
		struct fd f;
S
Scott Wood 已提交
1681 1682 1683
		struct kvm_device *dev;

		r = -EBADF;
A
Al Viro 已提交
1684 1685
		f = fdget(cap->args[0]);
		if (!f.file)
S
Scott Wood 已提交
1686 1687 1688
			break;

		r = -EPERM;
A
Al Viro 已提交
1689
		dev = kvm_device_from_filp(f.file);
S
Scott Wood 已提交
1690 1691 1692
		if (dev)
			r = kvmppc_mpic_connect_vcpu(dev, vcpu, cap->args[1]);

A
Al Viro 已提交
1693
		fdput(f);
S
Scott Wood 已提交
1694
		break;
S
Scott Wood 已提交
1695 1696
	}
#endif
1697 1698
#ifdef CONFIG_KVM_XICS
	case KVM_CAP_IRQ_XICS: {
A
Al Viro 已提交
1699
		struct fd f;
1700 1701 1702
		struct kvm_device *dev;

		r = -EBADF;
A
Al Viro 已提交
1703 1704
		f = fdget(cap->args[0]);
		if (!f.file)
1705 1706 1707
			break;

		r = -EPERM;
A
Al Viro 已提交
1708
		dev = kvm_device_from_filp(f.file);
1709 1710 1711 1712 1713 1714
		if (dev) {
			if (xive_enabled())
				r = kvmppc_xive_connect_vcpu(dev, vcpu, cap->args[1]);
			else
				r = kvmppc_xics_connect_vcpu(dev, vcpu, cap->args[1]);
		}
1715

A
Al Viro 已提交
1716
		fdput(f);
1717 1718 1719
		break;
	}
#endif /* CONFIG_KVM_XICS */
1720 1721 1722 1723 1724 1725 1726 1727 1728
#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 */
1729 1730 1731 1732 1733
	default:
		r = -EINVAL;
		break;
	}

1734 1735 1736
	if (!r)
		r = kvmppc_sanity_check(vcpu);

1737 1738 1739
	return r;
}

1740 1741 1742 1743 1744 1745 1746
bool kvm_arch_intc_initialized(struct kvm *kvm)
{
#ifdef CONFIG_KVM_MPIC
	if (kvm->arch.mpic)
		return true;
#endif
#ifdef CONFIG_KVM_XICS
1747
	if (kvm->arch.xics || kvm->arch.xive)
1748 1749 1750 1751 1752
		return true;
#endif
	return false;
}

1753 1754 1755 1756 1757 1758 1759 1760 1761 1762 1763 1764
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;
}

1765 1766
long kvm_arch_vcpu_async_ioctl(struct file *filp,
			       unsigned int ioctl, unsigned long arg)
1767 1768 1769 1770
{
	struct kvm_vcpu *vcpu = filp->private_data;
	void __user *argp = (void __user *)arg;

1771
	if (ioctl == KVM_INTERRUPT) {
1772 1773
		struct kvm_interrupt irq;
		if (copy_from_user(&irq, argp, sizeof(irq)))
1774 1775
			return -EFAULT;
		return kvm_vcpu_ioctl_interrupt(vcpu, &irq);
1776
	}
1777 1778 1779 1780 1781 1782 1783 1784 1785
	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;
1786

1787 1788 1789
	vcpu_load(vcpu);

	switch (ioctl) {
1790 1791 1792 1793 1794 1795 1796 1797 1798
	case KVM_ENABLE_CAP:
	{
		struct kvm_enable_cap cap;
		r = -EFAULT;
		if (copy_from_user(&cap, argp, sizeof(cap)))
			goto out;
		r = kvm_vcpu_ioctl_enable_cap(vcpu, &cap);
		break;
	}
S
Scott Wood 已提交
1799

1800 1801 1802 1803 1804 1805 1806 1807 1808 1809 1810 1811 1812 1813
	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;
	}

1814
#if defined(CONFIG_KVM_E500V2) || defined(CONFIG_KVM_E500MC)
S
Scott Wood 已提交
1815 1816 1817 1818 1819 1820 1821 1822 1823
	case KVM_DIRTY_TLB: {
		struct kvm_dirty_tlb dirty;
		r = -EFAULT;
		if (copy_from_user(&dirty, argp, sizeof(dirty)))
			goto out;
		r = kvm_vcpu_ioctl_dirty_tlb(vcpu, &dirty);
		break;
	}
#endif
1824 1825 1826 1827 1828
	default:
		r = -EINVAL;
	}

out:
1829
	vcpu_put(vcpu);
1830 1831 1832
	return r;
}

1833 1834 1835 1836 1837
int kvm_arch_vcpu_fault(struct kvm_vcpu *vcpu, struct vm_fault *vmf)
{
	return VM_FAULT_SIGBUS;
}

1838 1839
static int kvm_vm_ioctl_get_pvinfo(struct kvm_ppc_pvinfo *pvinfo)
{
1840 1841 1842
	u32 inst_nop = 0x60000000;
#ifdef CONFIG_KVM_BOOKE_HV
	u32 inst_sc1 = 0x44000022;
1843 1844 1845 1846
	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);
1847
#else
1848 1849 1850 1851 1852 1853 1854 1855 1856 1857 1858 1859 1860 1861
	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
	 */
1862 1863 1864 1865
	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);
1866
#endif
1867

1868 1869
	pvinfo->flags = KVM_PPC_PVINFO_FLAGS_EV_IDLE;

1870 1871 1872
	return 0;
}

1873 1874 1875 1876 1877 1878 1879 1880 1881 1882 1883 1884
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;
}

1885 1886 1887 1888 1889 1890 1891 1892 1893 1894 1895 1896 1897 1898 1899 1900 1901 1902

static int kvm_vm_ioctl_enable_cap(struct kvm *kvm,
				   struct kvm_enable_cap *cap)
{
	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;
1903 1904
		if (!kvmppc_book3s_hcall_implemented(kvm, hcall))
			break;
1905 1906 1907 1908 1909 1910 1911
		if (cap->args[1])
			set_bit(hcall / 4, kvm->arch.enabled_hcalls);
		else
			clear_bit(hcall / 4, kvm->arch.enabled_hcalls);
		r = 0;
		break;
	}
1912 1913 1914 1915 1916 1917 1918 1919 1920
	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;
	}
1921 1922 1923 1924 1925 1926 1927 1928 1929
#endif
	default:
		r = -EINVAL;
		break;
	}

	return r;
}

1930 1931 1932 1933 1934 1935 1936 1937 1938 1939 1940 1941 1942 1943 1944 1945 1946 1947 1948 1949 1950 1951 1952 1953 1954 1955 1956 1957 1958 1959 1960 1961 1962 1963 1964 1965 1966 1967 1968 1969 1970 1971 1972 1973 1974 1975 1976 1977 1978 1979 1980 1981 1982 1983 1984 1985 1986 1987 1988 1989 1990 1991 1992 1993 1994 1995 1996 1997 1998 1999 2000 2001 2002 2003 2004 2005 2006 2007 2008 2009 2010 2011 2012 2013 2014 2015 2016 2017 2018 2019 2020 2021 2022 2023 2024 2025 2026 2027 2028 2029 2030 2031 2032 2033 2034 2035 2036 2037 2038 2039 2040 2041 2042 2043 2044 2045 2046 2047
#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 |
			KVM_PPC_CPU_CHAR_COUNT_CACHE_DIS;
		cp->behaviour_mask = KVM_PPC_CPU_BEHAV_FAVOUR_SECURITY |
			KVM_PPC_CPU_BEHAV_L1D_FLUSH_PR |
			KVM_PPC_CPU_BEHAV_BNDS_CHK_SPEC_BAR;
	}
	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;
		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_COUNT_CACHE_DIS;

		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;
		cp->behaviour_mask = KVM_PPC_CPU_BEHAV_FAVOUR_SECURITY |
			KVM_PPC_CPU_BEHAV_L1D_FLUSH_PR |
			KVM_PPC_CPU_BEHAV_BNDS_CHK_SPEC_BAR;

		of_node_put(fw_features);
	}

	return 0;
}
#endif

2048 2049 2050
long kvm_arch_vm_ioctl(struct file *filp,
                       unsigned int ioctl, unsigned long arg)
{
2051
	struct kvm *kvm __maybe_unused = filp->private_data;
2052
	void __user *argp = (void __user *)arg;
2053 2054 2055
	long r;

	switch (ioctl) {
2056 2057
	case KVM_PPC_GET_PVINFO: {
		struct kvm_ppc_pvinfo pvinfo;
2058
		memset(&pvinfo, 0, sizeof(pvinfo));
2059 2060 2061 2062 2063 2064 2065 2066
		r = kvm_vm_ioctl_get_pvinfo(&pvinfo);
		if (copy_to_user(argp, &pvinfo, sizeof(pvinfo))) {
			r = -EFAULT;
			goto out;
		}

		break;
	}
2067 2068 2069 2070 2071 2072 2073 2074 2075
	case KVM_ENABLE_CAP:
	{
		struct kvm_enable_cap cap;
		r = -EFAULT;
		if (copy_from_user(&cap, argp, sizeof(cap)))
			goto out;
		r = kvm_vm_ioctl_enable_cap(kvm, &cap);
		break;
	}
2076
#ifdef CONFIG_SPAPR_TCE_IOMMU
2077 2078 2079 2080 2081 2082 2083 2084 2085 2086 2087 2088 2089
	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;
	}
2090 2091
	case KVM_CREATE_SPAPR_TCE: {
		struct kvm_create_spapr_tce create_tce;
2092
		struct kvm_create_spapr_tce_64 create_tce_64;
2093 2094 2095 2096

		r = -EFAULT;
		if (copy_from_user(&create_tce, argp, sizeof(create_tce)))
			goto out;
2097 2098 2099 2100 2101 2102 2103 2104

		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);
2105 2106
		goto out;
	}
2107 2108
#endif
#ifdef CONFIG_PPC_BOOK3S_64
2109 2110
	case KVM_PPC_GET_SMMU_INFO: {
		struct kvm_ppc_smmu_info info;
2111
		struct kvm *kvm = filp->private_data;
2112 2113

		memset(&info, 0, sizeof(info));
2114
		r = kvm->arch.kvm_ops->get_smmu_info(kvm, &info);
2115 2116 2117 2118
		if (r >= 0 && copy_to_user(argp, &info, sizeof(info)))
			r = -EFAULT;
		break;
	}
2119 2120 2121 2122 2123 2124
	case KVM_PPC_RTAS_DEFINE_TOKEN: {
		struct kvm *kvm = filp->private_data;

		r = kvm_vm_ioctl_rtas_define_token(kvm, argp);
		break;
	}
2125 2126 2127 2128 2129 2130 2131 2132 2133 2134 2135 2136 2137 2138 2139 2140 2141 2142 2143 2144 2145 2146 2147 2148 2149
	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;
	}
2150 2151 2152 2153 2154 2155 2156 2157
	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;
	}
2158 2159 2160 2161
	default: {
		struct kvm *kvm = filp->private_data;
		r = kvm->arch.kvm_ops->arch_vm_ioctl(filp, ioctl, arg);
	}
2162
#else /* CONFIG_PPC_BOOK3S_64 */
2163
	default:
2164
		r = -ENOTTY;
2165
#endif
2166
	}
2167
out:
2168 2169 2170
	return r;
}

2171 2172 2173 2174 2175 2176 2177 2178 2179 2180 2181 2182 2183 2184 2185 2186 2187
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;
}
2188
EXPORT_SYMBOL_GPL(kvmppc_alloc_lpid);
2189 2190 2191 2192 2193

void kvmppc_claim_lpid(long lpid)
{
	set_bit(lpid, lpid_inuse);
}
2194
EXPORT_SYMBOL_GPL(kvmppc_claim_lpid);
2195 2196 2197 2198 2199

void kvmppc_free_lpid(long lpid)
{
	clear_bit(lpid, lpid_inuse);
}
2200
EXPORT_SYMBOL_GPL(kvmppc_free_lpid);
2201 2202 2203 2204 2205 2206

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));
}
2207
EXPORT_SYMBOL_GPL(kvmppc_init_lpid);
2208

2209 2210 2211 2212 2213
int kvm_arch_init(void *opaque)
{
	return 0;
}

2214
EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_ppc_instr);