powerpc.c 56.4 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/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;
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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;
}

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_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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		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:
		/*
		 * Return false until all the XIVE infrastructure is
		 * in place including support for migration.
		 */
		r = 0;
		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:
619
		r = !!(hv_enabled && radix_enabled());
620 621
		break;
	case KVM_CAP_PPC_MMU_HASH_V3:
622 623
		r = !!(hv_enabled && cpu_has_feature(CPU_FTR_ARCH_300) &&
		       cpu_has_feature(CPU_FTR_HVMODE));
624
		break;
625 626 627 628
	case KVM_CAP_PPC_NESTED_HV:
		r = !!(hv_enabled && kvmppc_hv_ops->enable_nested &&
		       !kvmppc_hv_ops->enable_nested(NULL));
		break;
629
#endif
630
	case KVM_CAP_SYNC_MMU:
631
#ifdef CONFIG_KVM_BOOK3S_HV_POSSIBLE
632
		r = hv_enabled;
633 634 635 636
#elif defined(KVM_ARCH_WANT_MMU_NOTIFIER)
		r = 1;
#else
		r = 0;
637
#endif
638 639
		break;
#ifdef CONFIG_KVM_BOOK3S_HV_POSSIBLE
640
	case KVM_CAP_PPC_HTAB_FD:
641
		r = hv_enabled;
642
		break;
643
#endif
644 645 646 647 648 649 650
	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.
		 */
651
		if (hv_enabled)
652 653 654
			r = num_present_cpus();
		else
			r = num_online_cpus();
655
		break;
656 657 658
	case KVM_CAP_NR_MEMSLOTS:
		r = KVM_USER_MEM_SLOTS;
		break;
659 660 661
	case KVM_CAP_MAX_VCPUS:
		r = KVM_MAX_VCPUS;
		break;
662 663 664 665
#ifdef CONFIG_PPC_BOOK3S_64
	case KVM_CAP_PPC_GET_SMMU_INFO:
		r = 1;
		break;
666 667 668
	case KVM_CAP_SPAPR_MULTITCE:
		r = 1;
		break;
669
	case KVM_CAP_SPAPR_RESIZE_HPT:
670
		r = !!hv_enabled;
671
		break;
672 673 674 675 676
#endif
#ifdef CONFIG_KVM_BOOK3S_HV_POSSIBLE
	case KVM_CAP_PPC_FWNMI:
		r = hv_enabled;
		break;
677
#endif
678
#ifdef CONFIG_PPC_TRANSACTIONAL_MEM
679
	case KVM_CAP_PPC_HTM:
680 681
		r = !!(cur_cpu_spec->cpu_user_features2 & PPC_FEATURE2_HTM) ||
		     (hv_enabled && cpu_has_feature(CPU_FTR_P9_TM_HV_ASSIST));
682
		break;
683
#endif
684 685 686 687 688 689 690 691 692 693 694 695 696 697
	default:
		r = 0;
		break;
	}
	return r;

}

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

698
void kvm_arch_free_memslot(struct kvm *kvm, struct kvm_memory_slot *free,
699 700
			   struct kvm_memory_slot *dont)
{
701
	kvmppc_core_free_memslot(kvm, free, dont);
702 703
}

704 705
int kvm_arch_create_memslot(struct kvm *kvm, struct kvm_memory_slot *slot,
			    unsigned long npages)
706
{
707
	return kvmppc_core_create_memslot(kvm, slot, npages);
708 709
}

710
int kvm_arch_prepare_memory_region(struct kvm *kvm,
711
				   struct kvm_memory_slot *memslot,
712
				   const struct kvm_userspace_memory_region *mem,
713
				   enum kvm_mr_change change)
714
{
715
	return kvmppc_core_prepare_memory_region(kvm, memslot, mem);
716 717
}

718
void kvm_arch_commit_memory_region(struct kvm *kvm,
719
				   const struct kvm_userspace_memory_region *mem,
720
				   const struct kvm_memory_slot *old,
721
				   const struct kvm_memory_slot *new,
722
				   enum kvm_mr_change change)
723
{
724
	kvmppc_core_commit_memory_region(kvm, mem, old, new, change);
725 726
}

727 728
void kvm_arch_flush_shadow_memslot(struct kvm *kvm,
				   struct kvm_memory_slot *slot)
729
{
730
	kvmppc_core_flush_memslot(kvm, slot);
731 732
}

733 734
struct kvm_vcpu *kvm_arch_vcpu_create(struct kvm *kvm, unsigned int id)
{
735 736
	struct kvm_vcpu *vcpu;
	vcpu = kvmppc_core_vcpu_create(kvm, id);
737 738
	if (!IS_ERR(vcpu)) {
		vcpu->arch.wqp = &vcpu->wq;
739
		kvmppc_create_vcpu_debugfs(vcpu, id);
740
	}
741
	return vcpu;
742 743
}

744
void kvm_arch_vcpu_postcreate(struct kvm_vcpu *vcpu)
745 746 747
{
}

748 749
void kvm_arch_vcpu_free(struct kvm_vcpu *vcpu)
{
750 751 752
	/* Make sure we're not using the vcpu anymore */
	hrtimer_cancel(&vcpu->arch.dec_timer);

753
	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;
759
	case KVMPPC_IRQ_XICS:
760
		if (xics_on_xive())
761 762 763
			kvmppc_xive_cleanup_vcpu(vcpu);
		else
			kvmppc_xics_free_icp(vcpu);
764
		break;
765 766 767
	case KVMPPC_IRQ_XIVE:
		kvmppc_xive_native_cleanup_vcpu(vcpu);
		break;
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768 769
	}

770
	kvmppc_core_vcpu_free(vcpu);
771 772 773 774 775 776 777 778 779
}

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

int kvm_cpu_has_pending_timer(struct kvm_vcpu *vcpu)
{
780
	return kvmppc_core_pending_dec(vcpu);
781 782
}

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783
static enum hrtimer_restart kvmppc_decrementer_wakeup(struct hrtimer *timer)
A
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784 785 786 787
{
	struct kvm_vcpu *vcpu;

	vcpu = container_of(timer, struct kvm_vcpu, arch.dec_timer);
788
	kvmppc_decrementer_func(vcpu);
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	return HRTIMER_NORESTART;
}

793 794
int kvm_arch_vcpu_init(struct kvm_vcpu *vcpu)
{
795 796
	int ret;

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797 798
	hrtimer_init(&vcpu->arch.dec_timer, CLOCK_REALTIME, HRTIMER_MODE_ABS);
	vcpu->arch.dec_timer.function = kvmppc_decrementer_wakeup;
799
	vcpu->arch.dec_expires = get_tb();
800

801 802 803
#ifdef CONFIG_KVM_EXIT_TIMING
	mutex_init(&vcpu->arch.exit_timing_lock);
#endif
804 805
	ret = kvmppc_subarch_vcpu_init(vcpu);
	return ret;
806 807 808 809
}

void kvm_arch_vcpu_uninit(struct kvm_vcpu *vcpu)
{
810
	kvmppc_mmu_destroy(vcpu);
811
	kvmppc_subarch_vcpu_uninit(vcpu);
812 813 814 815
}

void kvm_arch_vcpu_load(struct kvm_vcpu *vcpu, int cpu)
{
816 817 818 819 820 821 822 823 824 825
#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
826
	kvmppc_core_vcpu_load(vcpu, cpu);
827 828 829 830
}

void kvm_arch_vcpu_put(struct kvm_vcpu *vcpu)
{
831
	kvmppc_core_vcpu_put(vcpu);
832 833 834
#ifdef CONFIG_BOOKE
	vcpu->arch.vrsave = mfspr(SPRN_VRSAVE);
#endif
835 836
}

837 838 839 840 841 842 843 844 845 846 847 848 849 850 851 852 853 854 855 856 857 858 859 860 861 862 863 864 865 866 867 868 869 870 871 872
/*
 * 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);
}

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
#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;

915 916
	if (index >= 32) {
		val.vval = VCPU_VSX_VR(vcpu, index - 32);
917
		val.vsxval[offset] = gpr;
918
		VCPU_VSX_VR(vcpu, index - 32) = val.vval;
919 920 921 922 923 924 925 926 927 928 929
	} 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;

930 931
	if (index >= 32) {
		val.vval = VCPU_VSX_VR(vcpu, index - 32);
932 933
		val.vsxval[0] = gpr;
		val.vsxval[1] = gpr;
934
		VCPU_VSX_VR(vcpu, index - 32) = val.vval;
935 936 937 938 939 940
	} else {
		VCPU_VSX_FPR(vcpu, index, 0) = gpr;
		VCPU_VSX_FPR(vcpu, index, 1) = gpr;
	}
}

941 942 943 944 945 946
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;

947
	if (index >= 32) {
948 949 950 951
		val.vsx32val[0] = gpr;
		val.vsx32val[1] = gpr;
		val.vsx32val[2] = gpr;
		val.vsx32val[3] = gpr;
952
		VCPU_VSX_VR(vcpu, index - 32) = val.vval;
953 954 955 956 957 958 959 960
	} 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];
	}
}

961 962 963 964 965 966 967 968 969 970 971
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;

972 973
	if (index >= 32) {
		val.vval = VCPU_VSX_VR(vcpu, index - 32);
974
		val.vsx32val[offset] = gpr32;
975
		VCPU_VSX_VR(vcpu, index - 32) = val.vval;
976 977 978 979 980 981 982 983 984 985
	} 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 */

986
#ifdef CONFIG_ALTIVEC
987 988 989 990 991 992 993 994 995 996 997 998 999 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
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);
}


1029
static inline void kvmppc_set_vmx_dword(struct kvm_vcpu *vcpu,
1030
	u64 gpr)
1031
{
1032 1033 1034
	union kvmppc_one_reg val;
	int offset = kvmppc_get_vmx_dword_offset(vcpu,
			vcpu->arch.mmio_vmx_offset);
1035 1036
	int index = vcpu->arch.io_gpr & KVM_MMIO_REG_MASK;

1037 1038 1039 1040 1041 1042 1043 1044 1045 1046 1047 1048 1049 1050 1051
	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;
1052

1053
	if (offset == -1)
1054 1055
		return;

1056 1057 1058 1059
	val.vval = VCPU_VSX_VR(vcpu, index);
	val.vsx32val[offset] = gpr32;
	VCPU_VSX_VR(vcpu, index) = val.vval;
}
1060

1061 1062 1063 1064 1065 1066 1067 1068 1069
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)
1070 1071
		return;

1072 1073 1074 1075 1076 1077 1078 1079 1080 1081 1082 1083
	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;
1084

1085 1086
	if (offset == -1)
		return;
1087

1088 1089 1090
	val.vval = VCPU_VSX_VR(vcpu, index);
	val.vsx8val[offset] = gpr8;
	VCPU_VSX_VR(vcpu, index) = val.vval;
1091 1092 1093
}
#endif /* CONFIG_ALTIVEC */

1094 1095 1096 1097 1098 1099 1100 1101 1102 1103 1104 1105 1106 1107 1108 1109 1110 1111 1112 1113 1114 1115 1116 1117 1118 1119 1120 1121 1122 1123
#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 */

1124 1125 1126
static void kvmppc_complete_mmio_load(struct kvm_vcpu *vcpu,
                                      struct kvm_run *run)
{
1127
	u64 uninitialized_var(gpr);
1128

1129
	if (run->mmio.len > sizeof(gpr)) {
1130 1131 1132 1133
		printk(KERN_ERR "bad MMIO length: %d\n", run->mmio.len);
		return;
	}

1134
	if (!vcpu->arch.mmio_host_swabbed) {
1135
		switch (run->mmio.len) {
1136
		case 8: gpr = *(u64 *)run->mmio.data; break;
1137 1138 1139
		case 4: gpr = *(u32 *)run->mmio.data; break;
		case 2: gpr = *(u16 *)run->mmio.data; break;
		case 1: gpr = *(u8 *)run->mmio.data; break;
1140 1141 1142
		}
	} else {
		switch (run->mmio.len) {
1143 1144 1145
		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;
1146
		case 1: gpr = *(u8 *)run->mmio.data; break;
1147 1148
		}
	}
1149

1150 1151 1152 1153
	/* 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
1154 1155 1156 1157 1158 1159 1160 1161 1162 1163 1164 1165 1166 1167 1168 1169
	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;
		}
	}

1170 1171
	switch (vcpu->arch.io_gpr & KVM_MMIO_REG_EXT_MASK) {
	case KVM_MMIO_REG_GPR:
1172 1173
		kvmppc_set_gpr(vcpu, vcpu->arch.io_gpr, gpr);
		break;
1174
	case KVM_MMIO_REG_FPR:
1175 1176 1177
		if (vcpu->kvm->arch.kvm_ops->giveup_ext)
			vcpu->kvm->arch.kvm_ops->giveup_ext(vcpu, MSR_FP);

1178
		VCPU_FPR(vcpu, vcpu->arch.io_gpr & KVM_MMIO_REG_MASK) = gpr;
1179
		break;
1180
#ifdef CONFIG_PPC_BOOK3S
1181 1182
	case KVM_MMIO_REG_QPR:
		vcpu->arch.qpr[vcpu->arch.io_gpr & KVM_MMIO_REG_MASK] = gpr;
1183
		break;
1184
	case KVM_MMIO_REG_FQPR:
1185
		VCPU_FPR(vcpu, vcpu->arch.io_gpr & KVM_MMIO_REG_MASK) = gpr;
1186
		vcpu->arch.qpr[vcpu->arch.io_gpr & KVM_MMIO_REG_MASK] = gpr;
1187
		break;
1188 1189 1190
#endif
#ifdef CONFIG_VSX
	case KVM_MMIO_REG_VSX:
1191 1192 1193
		if (vcpu->kvm->arch.kvm_ops->giveup_ext)
			vcpu->kvm->arch.kvm_ops->giveup_ext(vcpu, MSR_VSX);

1194
		if (vcpu->arch.mmio_copy_type == KVMPPC_VSX_COPY_DWORD)
1195
			kvmppc_set_vsr_dword(vcpu, gpr);
1196
		else if (vcpu->arch.mmio_copy_type == KVMPPC_VSX_COPY_WORD)
1197
			kvmppc_set_vsr_word(vcpu, gpr);
1198
		else if (vcpu->arch.mmio_copy_type ==
1199 1200
				KVMPPC_VSX_COPY_DWORD_LOAD_DUMP)
			kvmppc_set_vsr_dword_dump(vcpu, gpr);
1201
		else if (vcpu->arch.mmio_copy_type ==
1202 1203
				KVMPPC_VSX_COPY_WORD_LOAD_DUMP)
			kvmppc_set_vsr_word_dump(vcpu, gpr);
1204
		break;
1205 1206 1207
#endif
#ifdef CONFIG_ALTIVEC
	case KVM_MMIO_REG_VMX:
1208 1209 1210
		if (vcpu->kvm->arch.kvm_ops->giveup_ext)
			vcpu->kvm->arch.kvm_ops->giveup_ext(vcpu, MSR_VEC);

1211 1212 1213 1214 1215 1216 1217 1218 1219 1220
		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);
1221
		break;
1222 1223 1224 1225 1226 1227 1228 1229
#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;
1230
#endif
1231 1232 1233
	default:
		BUG();
	}
1234 1235
}

1236 1237 1238
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)
1239
{
1240
	int idx, ret;
1241
	bool host_swabbed;
1242

1243
	/* Pity C doesn't have a logical XOR operator */
1244
	if (kvmppc_need_byteswap(vcpu)) {
1245
		host_swabbed = is_default_endian;
1246
	} else {
1247
		host_swabbed = !is_default_endian;
1248
	}
1249

1250 1251 1252 1253 1254 1255 1256 1257 1258 1259
	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;
1260
	vcpu->arch.mmio_host_swabbed = host_swabbed;
1261 1262
	vcpu->mmio_needed = 1;
	vcpu->mmio_is_write = 0;
1263
	vcpu->arch.mmio_sign_extend = sign_extend;
1264

1265 1266
	idx = srcu_read_lock(&vcpu->kvm->srcu);

1267
	ret = kvm_io_bus_read(vcpu, KVM_MMIO_BUS, run->mmio.phys_addr,
1268 1269 1270 1271 1272
			      bytes, &run->mmio.data);

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

	if (!ret) {
A
Alexander Graf 已提交
1273 1274 1275 1276 1277
		kvmppc_complete_mmio_load(vcpu, run);
		vcpu->mmio_needed = 0;
		return EMULATE_DONE;
	}

1278 1279
	return EMULATE_DO_MMIO;
}
1280 1281 1282 1283 1284 1285 1286

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);
}
1287
EXPORT_SYMBOL_GPL(kvmppc_handle_load);
1288

A
Alexander Graf 已提交
1289 1290
/* Same as above, but sign extends */
int kvmppc_handle_loads(struct kvm_run *run, struct kvm_vcpu *vcpu,
1291 1292
			unsigned int rt, unsigned int bytes,
			int is_default_endian)
A
Alexander Graf 已提交
1293
{
1294
	return __kvmppc_handle_load(run, vcpu, rt, bytes, is_default_endian, 1);
A
Alexander Graf 已提交
1295 1296
}

1297 1298 1299 1300 1301 1302 1303
#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;

1304 1305
	/* Currently, mmio_vsx_copy_nums only allowed to be 4 or less */
	if (vcpu->arch.mmio_vsx_copy_nums > 4)
1306 1307 1308 1309 1310 1311 1312 1313 1314 1315 1316 1317 1318 1319 1320 1321 1322 1323
		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 */

1324
int kvmppc_handle_store(struct kvm_run *run, struct kvm_vcpu *vcpu,
1325
			u64 val, unsigned int bytes, int is_default_endian)
1326 1327
{
	void *data = run->mmio.data;
1328
	int idx, ret;
1329
	bool host_swabbed;
1330

1331
	/* Pity C doesn't have a logical XOR operator */
1332
	if (kvmppc_need_byteswap(vcpu)) {
1333
		host_swabbed = is_default_endian;
1334
	} else {
1335
		host_swabbed = !is_default_endian;
1336
	}
1337 1338 1339 1340 1341 1342 1343 1344 1345 1346 1347 1348

	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;

1349 1350 1351
	if ((vcpu->arch.mmio_sp64_extend) && (bytes == 4))
		val = dp_to_sp(val);

1352
	/* Store the value at the lowest bytes in 'data'. */
1353
	if (!host_swabbed) {
1354
		switch (bytes) {
1355
		case 8: *(u64 *)data = val; break;
1356 1357 1358 1359 1360 1361
		case 4: *(u32 *)data = val; break;
		case 2: *(u16 *)data = val; break;
		case 1: *(u8  *)data = val; break;
		}
	} else {
		switch (bytes) {
1362 1363 1364 1365
		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;
1366 1367 1368
		}
	}

1369 1370
	idx = srcu_read_lock(&vcpu->kvm->srcu);

1371
	ret = kvm_io_bus_write(vcpu, KVM_MMIO_BUS, run->mmio.phys_addr,
1372 1373 1374 1375 1376
			       bytes, &run->mmio.data);

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

	if (!ret) {
A
Alexander Graf 已提交
1377 1378 1379 1380
		vcpu->mmio_needed = 0;
		return EMULATE_DONE;
	}

1381 1382
	return EMULATE_DO_MMIO;
}
1383
EXPORT_SYMBOL_GPL(kvmppc_handle_store);
1384

1385 1386 1387 1388 1389 1390
#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;
1391
	int copy_type = vcpu->arch.mmio_copy_type;
1392 1393 1394 1395 1396 1397 1398 1399 1400 1401 1402 1403
	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;
		}

1404
		if (rs < 32) {
1405 1406
			*val = VCPU_VSX_FPR(vcpu, rs, vsx_offset);
		} else {
1407
			reg.vval = VCPU_VSX_VR(vcpu, rs - 32);
1408 1409 1410 1411 1412 1413 1414 1415 1416 1417 1418 1419 1420
			*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;
		}

1421
		if (rs < 32) {
1422 1423 1424 1425 1426
			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 {
1427
			reg.vval = VCPU_VSX_VR(vcpu, rs - 32);
1428 1429 1430 1431 1432 1433 1434 1435 1436 1437 1438 1439 1440 1441 1442 1443 1444 1445 1446 1447
			*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;

1448 1449
	/* Currently, mmio_vsx_copy_nums only allowed to be 4 or less */
	if (vcpu->arch.mmio_vsx_copy_nums > 4)
1450 1451 1452 1453 1454 1455 1456 1457 1458 1459 1460 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
		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 */

1506
#ifdef CONFIG_ALTIVEC
1507 1508
int kvmppc_handle_vmx_load(struct kvm_run *run, struct kvm_vcpu *vcpu,
		unsigned int rt, unsigned int bytes, int is_default_endian)
1509
{
1510
	enum emulation_result emulated = EMULATE_DONE;
1511

1512 1513 1514
	if (vcpu->arch.mmio_vsx_copy_nums > 2)
		return EMULATE_FAIL;

1515
	while (vcpu->arch.mmio_vmx_copy_nums) {
1516
		emulated = __kvmppc_handle_load(run, vcpu, rt, bytes,
1517 1518 1519 1520 1521 1522 1523
				is_default_endian, 0);

		if (emulated != EMULATE_DONE)
			break;

		vcpu->arch.paddr_accessed += run->mmio.len;
		vcpu->arch.mmio_vmx_copy_nums--;
1524
		vcpu->arch.mmio_vmx_offset++;
1525 1526 1527 1528 1529
	}

	return emulated;
}

1530
int kvmppc_get_vmx_dword(struct kvm_vcpu *vcpu, int index, u64 *val)
1531
{
1532 1533 1534
	union kvmppc_one_reg reg;
	int vmx_offset = 0;
	int result = 0;
1535

1536 1537
	vmx_offset =
		kvmppc_get_vmx_dword_offset(vcpu, vcpu->arch.mmio_vmx_offset);
1538

1539
	if (vmx_offset == -1)
1540 1541
		return -1;

1542 1543
	reg.vval = VCPU_VSX_VR(vcpu, index);
	*val = reg.vsxval[vmx_offset];
1544

1545 1546
	return result;
}
1547

1548 1549 1550 1551 1552 1553 1554 1555 1556 1557 1558 1559 1560 1561 1562 1563 1564 1565 1566 1567 1568 1569 1570 1571 1572 1573 1574 1575 1576 1577 1578 1579 1580 1581
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;
1582 1583
}

1584 1585 1586 1587 1588 1589 1590 1591 1592 1593 1594 1595 1596 1597 1598 1599
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;
1600 1601
}

1602 1603
int kvmppc_handle_vmx_store(struct kvm_run *run, struct kvm_vcpu *vcpu,
		unsigned int rs, unsigned int bytes, int is_default_endian)
1604 1605
{
	u64 val = 0;
1606
	unsigned int index = rs & KVM_MMIO_REG_MASK;
1607 1608
	enum emulation_result emulated = EMULATE_DONE;

1609 1610 1611
	if (vcpu->arch.mmio_vsx_copy_nums > 2)
		return EMULATE_FAIL;

1612 1613 1614
	vcpu->arch.io_gpr = rs;

	while (vcpu->arch.mmio_vmx_copy_nums) {
1615 1616 1617 1618 1619 1620 1621 1622 1623 1624 1625 1626 1627 1628 1629 1630 1631 1632 1633
		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:
1634
			return EMULATE_FAIL;
1635
		}
1636

1637
		emulated = kvmppc_handle_store(run, vcpu, val, bytes,
1638 1639 1640 1641 1642 1643
				is_default_endian);
		if (emulated != EMULATE_DONE)
			break;

		vcpu->arch.paddr_accessed += run->mmio.len;
		vcpu->arch.mmio_vmx_copy_nums--;
1644
		vcpu->arch.mmio_vmx_offset++;
1645 1646 1647 1648 1649 1650 1651 1652 1653 1654 1655 1656 1657 1658
	}

	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) {
1659 1660
		emulated = kvmppc_handle_vmx_load(run, vcpu,
				vcpu->arch.io_gpr, run->mmio.len, 1);
1661
	} else {
1662 1663
		emulated = kvmppc_handle_vmx_store(run, vcpu,
				vcpu->arch.io_gpr, run->mmio.len, 1);
1664 1665 1666 1667 1668 1669 1670 1671 1672 1673 1674 1675 1676 1677 1678 1679 1680 1681 1682 1683 1684
	}

	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 */

1685 1686 1687 1688 1689 1690 1691 1692 1693 1694 1695 1696 1697 1698
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) {
1699 1700 1701 1702 1703 1704
#ifdef CONFIG_ALTIVEC
		case KVM_REG_PPC_VR0 ... KVM_REG_PPC_VR31:
			if (!cpu_has_feature(CPU_FTR_ALTIVEC)) {
				r = -ENXIO;
				break;
			}
1705
			val.vval = vcpu->arch.vr.vr[reg->id - KVM_REG_PPC_VR0];
1706 1707 1708 1709 1710 1711
			break;
		case KVM_REG_PPC_VSCR:
			if (!cpu_has_feature(CPU_FTR_ALTIVEC)) {
				r = -ENXIO;
				break;
			}
1712
			val = get_reg_val(reg->id, vcpu->arch.vr.vscr.u[3]);
1713 1714
			break;
		case KVM_REG_PPC_VRSAVE:
1715
			val = get_reg_val(reg->id, vcpu->arch.vrsave);
1716 1717
			break;
#endif /* CONFIG_ALTIVEC */
1718 1719 1720 1721 1722 1723 1724 1725 1726 1727 1728 1729 1730 1731 1732 1733 1734 1735 1736 1737 1738 1739 1740 1741 1742 1743 1744 1745 1746 1747 1748 1749
		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) {
1750 1751 1752 1753 1754 1755
#ifdef CONFIG_ALTIVEC
		case KVM_REG_PPC_VR0 ... KVM_REG_PPC_VR31:
			if (!cpu_has_feature(CPU_FTR_ALTIVEC)) {
				r = -ENXIO;
				break;
			}
1756
			vcpu->arch.vr.vr[reg->id - KVM_REG_PPC_VR0] = val.vval;
1757 1758 1759 1760 1761 1762
			break;
		case KVM_REG_PPC_VSCR:
			if (!cpu_has_feature(CPU_FTR_ALTIVEC)) {
				r = -ENXIO;
				break;
			}
1763
			vcpu->arch.vr.vscr.u[3] = set_reg_val(reg->id, val);
1764 1765
			break;
		case KVM_REG_PPC_VRSAVE:
1766 1767 1768 1769 1770
			if (!cpu_has_feature(CPU_FTR_ALTIVEC)) {
				r = -ENXIO;
				break;
			}
			vcpu->arch.vrsave = set_reg_val(reg->id, val);
1771 1772
			break;
#endif /* CONFIG_ALTIVEC */
1773 1774 1775 1776 1777 1778 1779 1780 1781
		default:
			r = -EINVAL;
			break;
		}
	}

	return r;
}

1782 1783 1784 1785
int kvm_arch_vcpu_ioctl_run(struct kvm_vcpu *vcpu, struct kvm_run *run)
{
	int r;

1786 1787
	vcpu_load(vcpu);

1788
	if (vcpu->mmio_needed) {
1789
		vcpu->mmio_needed = 0;
1790 1791
		if (!vcpu->mmio_is_write)
			kvmppc_complete_mmio_load(vcpu, run);
1792 1793 1794 1795 1796 1797 1798 1799 1800 1801
#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;
1802
				goto out;
1803 1804
			}
		}
1805 1806
#endif
#ifdef CONFIG_ALTIVEC
1807
		if (vcpu->arch.mmio_vmx_copy_nums > 0) {
1808
			vcpu->arch.mmio_vmx_copy_nums--;
1809 1810
			vcpu->arch.mmio_vmx_offset++;
		}
1811 1812 1813 1814 1815

		if (vcpu->arch.mmio_vmx_copy_nums > 0) {
			r = kvmppc_emulate_mmio_vmx_loadstore(vcpu, run);
			if (r == RESUME_HOST) {
				vcpu->mmio_needed = 1;
1816
				goto out;
1817 1818
			}
		}
1819
#endif
1820 1821 1822 1823 1824 1825 1826
	} 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;
1827 1828 1829 1830 1831 1832 1833
	} 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;
1834 1835 1836 1837 1838
#ifdef CONFIG_BOOKE
	} else if (vcpu->arch.epr_needed) {
		kvmppc_set_epr(vcpu, run->epr.epr);
		vcpu->arch.epr_needed = 0;
#endif
1839 1840
	}

1841
	kvm_sigset_activate(vcpu);
1842

1843 1844 1845 1846
	if (run->immediate_exit)
		r = -EINTR;
	else
		r = kvmppc_vcpu_run(run, vcpu);
1847

1848
	kvm_sigset_deactivate(vcpu);
1849

1850
#ifdef CONFIG_ALTIVEC
1851
out:
1852
#endif
1853
	vcpu_put(vcpu);
1854 1855 1856 1857 1858
	return r;
}

int kvm_vcpu_ioctl_interrupt(struct kvm_vcpu *vcpu, struct kvm_interrupt *irq)
{
1859
	if (irq->irq == KVM_INTERRUPT_UNSET) {
1860
		kvmppc_core_dequeue_external(vcpu);
1861 1862 1863 1864
		return 0;
	}

	kvmppc_core_queue_external(vcpu, irq);
1865

1866
	kvm_vcpu_kick(vcpu);
1867

1868 1869 1870
	return 0;
}

1871 1872 1873 1874 1875 1876 1877 1878 1879
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) {
1880 1881 1882 1883
	case KVM_CAP_PPC_OSI:
		r = 0;
		vcpu->arch.osi_enabled = true;
		break;
1884 1885 1886 1887
	case KVM_CAP_PPC_PAPR:
		r = 0;
		vcpu->arch.papr_enabled = true;
		break;
1888 1889
	case KVM_CAP_PPC_EPR:
		r = 0;
1890 1891 1892 1893
		if (cap->args[0])
			vcpu->arch.epr_flags |= KVMPPC_EPR_USER;
		else
			vcpu->arch.epr_flags &= ~KVMPPC_EPR_USER;
1894
		break;
1895 1896 1897 1898 1899 1900
#ifdef CONFIG_BOOKE
	case KVM_CAP_PPC_BOOKE_WATCHDOG:
		r = 0;
		vcpu->arch.watchdog_enabled = true;
		break;
#endif
1901
#if defined(CONFIG_KVM_E500V2) || defined(CONFIG_KVM_E500MC)
S
Scott Wood 已提交
1902 1903 1904 1905 1906 1907 1908 1909 1910 1911
	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
1912 1913 1914 1915
	}
#endif
#ifdef CONFIG_KVM_MPIC
	case KVM_CAP_IRQ_MPIC: {
A
Al Viro 已提交
1916
		struct fd f;
S
Scott Wood 已提交
1917 1918 1919
		struct kvm_device *dev;

		r = -EBADF;
A
Al Viro 已提交
1920 1921
		f = fdget(cap->args[0]);
		if (!f.file)
S
Scott Wood 已提交
1922 1923 1924
			break;

		r = -EPERM;
A
Al Viro 已提交
1925
		dev = kvm_device_from_filp(f.file);
S
Scott Wood 已提交
1926 1927 1928
		if (dev)
			r = kvmppc_mpic_connect_vcpu(dev, vcpu, cap->args[1]);

A
Al Viro 已提交
1929
		fdput(f);
S
Scott Wood 已提交
1930
		break;
S
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1931 1932
	}
#endif
1933 1934
#ifdef CONFIG_KVM_XICS
	case KVM_CAP_IRQ_XICS: {
A
Al Viro 已提交
1935
		struct fd f;
1936 1937 1938
		struct kvm_device *dev;

		r = -EBADF;
A
Al Viro 已提交
1939 1940
		f = fdget(cap->args[0]);
		if (!f.file)
1941 1942 1943
			break;

		r = -EPERM;
A
Al Viro 已提交
1944
		dev = kvm_device_from_filp(f.file);
1945
		if (dev) {
1946
			if (xics_on_xive())
1947 1948 1949 1950
				r = kvmppc_xive_connect_vcpu(dev, vcpu, cap->args[1]);
			else
				r = kvmppc_xics_connect_vcpu(dev, vcpu, cap->args[1]);
		}
1951

A
Al Viro 已提交
1952
		fdput(f);
1953 1954 1955
		break;
	}
#endif /* CONFIG_KVM_XICS */
1956 1957 1958 1959 1960 1961 1962 1963 1964 1965 1966 1967 1968 1969 1970 1971 1972 1973 1974 1975 1976 1977 1978 1979
#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 */
1980 1981 1982 1983 1984 1985 1986 1987 1988
#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 */
1989 1990 1991 1992 1993
	default:
		r = -EINVAL;
		break;
	}

1994 1995 1996
	if (!r)
		r = kvmppc_sanity_check(vcpu);

1997 1998 1999
	return r;
}

2000 2001 2002 2003 2004 2005 2006
bool kvm_arch_intc_initialized(struct kvm *kvm)
{
#ifdef CONFIG_KVM_MPIC
	if (kvm->arch.mpic)
		return true;
#endif
#ifdef CONFIG_KVM_XICS
2007
	if (kvm->arch.xics || kvm->arch.xive)
2008 2009 2010 2011 2012
		return true;
#endif
	return false;
}

2013 2014 2015 2016 2017 2018 2019 2020 2021 2022 2023 2024
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;
}

2025 2026
long kvm_arch_vcpu_async_ioctl(struct file *filp,
			       unsigned int ioctl, unsigned long arg)
2027 2028 2029 2030
{
	struct kvm_vcpu *vcpu = filp->private_data;
	void __user *argp = (void __user *)arg;

2031
	if (ioctl == KVM_INTERRUPT) {
2032 2033
		struct kvm_interrupt irq;
		if (copy_from_user(&irq, argp, sizeof(irq)))
2034 2035
			return -EFAULT;
		return kvm_vcpu_ioctl_interrupt(vcpu, &irq);
2036
	}
2037 2038 2039 2040 2041 2042 2043 2044 2045
	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;
2046

2047
	switch (ioctl) {
2048 2049 2050 2051
	case KVM_ENABLE_CAP:
	{
		struct kvm_enable_cap cap;
		r = -EFAULT;
2052
		vcpu_load(vcpu);
2053 2054 2055
		if (copy_from_user(&cap, argp, sizeof(cap)))
			goto out;
		r = kvm_vcpu_ioctl_enable_cap(vcpu, &cap);
2056
		vcpu_put(vcpu);
2057 2058
		break;
	}
S
Scott Wood 已提交
2059

2060 2061 2062 2063 2064 2065 2066 2067 2068 2069 2070 2071 2072 2073
	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;
	}

2074
#if defined(CONFIG_KVM_E500V2) || defined(CONFIG_KVM_E500MC)
S
Scott Wood 已提交
2075 2076 2077
	case KVM_DIRTY_TLB: {
		struct kvm_dirty_tlb dirty;
		r = -EFAULT;
2078
		vcpu_load(vcpu);
S
Scott Wood 已提交
2079 2080 2081
		if (copy_from_user(&dirty, argp, sizeof(dirty)))
			goto out;
		r = kvm_vcpu_ioctl_dirty_tlb(vcpu, &dirty);
2082
		vcpu_put(vcpu);
S
Scott Wood 已提交
2083 2084 2085
		break;
	}
#endif
2086 2087 2088 2089 2090 2091 2092 2093
	default:
		r = -EINVAL;
	}

out:
	return r;
}

2094
vm_fault_t kvm_arch_vcpu_fault(struct kvm_vcpu *vcpu, struct vm_fault *vmf)
2095 2096 2097 2098
{
	return VM_FAULT_SIGBUS;
}

2099 2100
static int kvm_vm_ioctl_get_pvinfo(struct kvm_ppc_pvinfo *pvinfo)
{
2101 2102 2103
	u32 inst_nop = 0x60000000;
#ifdef CONFIG_KVM_BOOKE_HV
	u32 inst_sc1 = 0x44000022;
2104 2105 2106 2107
	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);
2108
#else
2109 2110 2111 2112 2113 2114 2115 2116 2117 2118 2119 2120 2121 2122
	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
	 */
2123 2124 2125 2126
	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);
2127
#endif
2128

2129 2130
	pvinfo->flags = KVM_PPC_PVINFO_FLAGS_EV_IDLE;

2131 2132 2133
	return 0;
}

2134 2135 2136 2137 2138 2139 2140 2141 2142 2143 2144 2145
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;
}

2146

2147 2148
int kvm_vm_ioctl_enable_cap(struct kvm *kvm,
			    struct kvm_enable_cap *cap)
2149 2150 2151 2152 2153 2154 2155 2156 2157 2158 2159 2160 2161 2162 2163
{
	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;
2164 2165
		if (!kvmppc_book3s_hcall_implemented(kvm, hcall))
			break;
2166 2167 2168 2169 2170 2171 2172
		if (cap->args[1])
			set_bit(hcall / 4, kvm->arch.enabled_hcalls);
		else
			clear_bit(hcall / 4, kvm->arch.enabled_hcalls);
		r = 0;
		break;
	}
2173 2174 2175 2176 2177 2178 2179 2180 2181
	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;
	}
2182 2183 2184 2185 2186 2187 2188 2189

	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;
2190 2191 2192 2193 2194 2195 2196 2197 2198
#endif
	default:
		r = -EINVAL;
		break;
	}

	return r;
}

2199 2200 2201 2202 2203 2204 2205 2206 2207 2208 2209 2210 2211 2212 2213 2214 2215 2216 2217 2218 2219 2220 2221 2222 2223 2224 2225 2226 2227
#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 |
2228 2229
			KVM_PPC_CPU_CHAR_COUNT_CACHE_DIS |
			KVM_PPC_CPU_CHAR_BCCTR_FLUSH_ASSIST;
2230 2231
		cp->behaviour_mask = KVM_PPC_CPU_BEHAV_FAVOUR_SECURITY |
			KVM_PPC_CPU_BEHAV_L1D_FLUSH_PR |
2232 2233
			KVM_PPC_CPU_BEHAV_BNDS_CHK_SPEC_BAR |
			KVM_PPC_CPU_BEHAV_FLUSH_COUNT_CACHE;
2234 2235 2236 2237 2238 2239 2240 2241 2242 2243 2244 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
	}
	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;
2292 2293 2294
		if (have_fw_feat(fw_features, "enabled",
				 "fw-count-cache-flush-bcctr2,0,0"))
			cp->character |= KVM_PPC_CPU_CHAR_BCCTR_FLUSH_ASSIST;
2295 2296 2297 2298 2299
		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 |
2300 2301
			KVM_PPC_CPU_CHAR_COUNT_CACHE_DIS |
			KVM_PPC_CPU_CHAR_BCCTR_FLUSH_ASSIST;
2302 2303 2304 2305 2306 2307 2308 2309 2310 2311

		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;
2312 2313 2314
		if (have_fw_feat(fw_features, "enabled",
				 "needs-count-cache-flush-on-context-switch"))
			cp->behaviour |= KVM_PPC_CPU_BEHAV_FLUSH_COUNT_CACHE;
2315 2316
		cp->behaviour_mask = KVM_PPC_CPU_BEHAV_FAVOUR_SECURITY |
			KVM_PPC_CPU_BEHAV_L1D_FLUSH_PR |
2317 2318
			KVM_PPC_CPU_BEHAV_BNDS_CHK_SPEC_BAR |
			KVM_PPC_CPU_BEHAV_FLUSH_COUNT_CACHE;
2319 2320 2321 2322 2323 2324 2325 2326

		of_node_put(fw_features);
	}

	return 0;
}
#endif

2327 2328 2329
long kvm_arch_vm_ioctl(struct file *filp,
                       unsigned int ioctl, unsigned long arg)
{
2330
	struct kvm *kvm __maybe_unused = filp->private_data;
2331
	void __user *argp = (void __user *)arg;
2332 2333 2334
	long r;

	switch (ioctl) {
2335 2336
	case KVM_PPC_GET_PVINFO: {
		struct kvm_ppc_pvinfo pvinfo;
2337
		memset(&pvinfo, 0, sizeof(pvinfo));
2338 2339 2340 2341 2342 2343 2344 2345
		r = kvm_vm_ioctl_get_pvinfo(&pvinfo);
		if (copy_to_user(argp, &pvinfo, sizeof(pvinfo))) {
			r = -EFAULT;
			goto out;
		}

		break;
	}
2346
#ifdef CONFIG_SPAPR_TCE_IOMMU
2347 2348 2349 2350 2351 2352 2353 2354 2355 2356 2357 2358 2359
	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;
	}
2360 2361
	case KVM_CREATE_SPAPR_TCE: {
		struct kvm_create_spapr_tce create_tce;
2362
		struct kvm_create_spapr_tce_64 create_tce_64;
2363 2364 2365 2366

		r = -EFAULT;
		if (copy_from_user(&create_tce, argp, sizeof(create_tce)))
			goto out;
2367 2368 2369 2370 2371 2372 2373 2374

		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);
2375 2376
		goto out;
	}
2377 2378
#endif
#ifdef CONFIG_PPC_BOOK3S_64
2379 2380
	case KVM_PPC_GET_SMMU_INFO: {
		struct kvm_ppc_smmu_info info;
2381
		struct kvm *kvm = filp->private_data;
2382 2383

		memset(&info, 0, sizeof(info));
2384
		r = kvm->arch.kvm_ops->get_smmu_info(kvm, &info);
2385 2386 2387 2388
		if (r >= 0 && copy_to_user(argp, &info, sizeof(info)))
			r = -EFAULT;
		break;
	}
2389 2390 2391 2392 2393 2394
	case KVM_PPC_RTAS_DEFINE_TOKEN: {
		struct kvm *kvm = filp->private_data;

		r = kvm_vm_ioctl_rtas_define_token(kvm, argp);
		break;
	}
2395 2396 2397 2398 2399 2400 2401 2402 2403 2404 2405 2406 2407 2408 2409 2410 2411 2412 2413 2414 2415 2416 2417 2418 2419
	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;
	}
2420 2421 2422 2423 2424 2425 2426 2427
	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;
	}
2428 2429 2430 2431
	default: {
		struct kvm *kvm = filp->private_data;
		r = kvm->arch.kvm_ops->arch_vm_ioctl(filp, ioctl, arg);
	}
2432
#else /* CONFIG_PPC_BOOK3S_64 */
2433
	default:
2434
		r = -ENOTTY;
2435
#endif
2436
	}
2437
out:
2438 2439 2440
	return r;
}

2441 2442 2443 2444 2445 2446 2447 2448 2449 2450 2451 2452 2453 2454 2455 2456 2457
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;
}
2458
EXPORT_SYMBOL_GPL(kvmppc_alloc_lpid);
2459 2460 2461 2462 2463

void kvmppc_claim_lpid(long lpid)
{
	set_bit(lpid, lpid_inuse);
}
2464
EXPORT_SYMBOL_GPL(kvmppc_claim_lpid);
2465 2466 2467 2468 2469

void kvmppc_free_lpid(long lpid)
{
	clear_bit(lpid, lpid_inuse);
}
2470
EXPORT_SYMBOL_GPL(kvmppc_free_lpid);
2471 2472 2473 2474 2475 2476

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));
}
2477
EXPORT_SYMBOL_GPL(kvmppc_init_lpid);
2478

2479 2480 2481 2482 2483
int kvm_arch_init(void *opaque)
{
	return 0;
}

2484
EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_ppc_instr);