powerpc.c 34.9 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 "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) ||
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	       v->requests;
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}

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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 (vcpu->requests) {
			/* 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);
		clear_bit(KVM_REQ_UNHALT, &vcpu->requests);
		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_MMIO
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	case KVM_CAP_COALESCED_MMIO:
		r = KVM_COALESCED_MMIO_PAGE_OFFSET;
		break;
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#endif
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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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	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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		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;
		if (hv_enabled) {
			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_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 && !radix_enabled() &&
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		       cpu_has_feature(CPU_FTR_ARCH_300));
		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.
		 */
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		if (hv_enabled)
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			r = num_present_cpus();
		else
			r = num_online_cpus();
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		break;
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	case KVM_CAP_NR_MEMSLOTS:
		r = KVM_USER_MEM_SLOTS;
		break;
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	case KVM_CAP_MAX_VCPUS:
		r = KVM_MAX_VCPUS;
		break;
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#ifdef CONFIG_PPC_BOOK3S_64
	case KVM_CAP_PPC_GET_SMMU_INFO:
		r = 1;
		break;
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	case KVM_CAP_SPAPR_MULTITCE:
		r = 1;
		break;
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	case KVM_CAP_SPAPR_RESIZE_HPT:
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		/* Disable this on POWER9 until code handles new HPTE format */
		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_PPC_HTM:
		r = cpu_has_feature(CPU_FTR_TM_COMP) &&
		    is_kvmppc_hv_enabled(kvm);
		break;
626 627 628 629 630 631 632 633 634 635 636 637 638 639
	default:
		r = 0;
		break;
	}
	return r;

}

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

640
void kvm_arch_free_memslot(struct kvm *kvm, struct kvm_memory_slot *free,
641 642
			   struct kvm_memory_slot *dont)
{
643
	kvmppc_core_free_memslot(kvm, free, dont);
644 645
}

646 647
int kvm_arch_create_memslot(struct kvm *kvm, struct kvm_memory_slot *slot,
			    unsigned long npages)
648
{
649
	return kvmppc_core_create_memslot(kvm, slot, npages);
650 651
}

652
int kvm_arch_prepare_memory_region(struct kvm *kvm,
653
				   struct kvm_memory_slot *memslot,
654
				   const struct kvm_userspace_memory_region *mem,
655
				   enum kvm_mr_change change)
656
{
657
	return kvmppc_core_prepare_memory_region(kvm, memslot, mem);
658 659
}

660
void kvm_arch_commit_memory_region(struct kvm *kvm,
661
				   const struct kvm_userspace_memory_region *mem,
662
				   const struct kvm_memory_slot *old,
663
				   const struct kvm_memory_slot *new,
664
				   enum kvm_mr_change change)
665
{
666
	kvmppc_core_commit_memory_region(kvm, mem, old, new);
667 668
}

669 670
void kvm_arch_flush_shadow_memslot(struct kvm *kvm,
				   struct kvm_memory_slot *slot)
671
{
672
	kvmppc_core_flush_memslot(kvm, slot);
673 674
}

675 676
struct kvm_vcpu *kvm_arch_vcpu_create(struct kvm *kvm, unsigned int id)
{
677 678
	struct kvm_vcpu *vcpu;
	vcpu = kvmppc_core_vcpu_create(kvm, id);
679 680
	if (!IS_ERR(vcpu)) {
		vcpu->arch.wqp = &vcpu->wq;
681
		kvmppc_create_vcpu_debugfs(vcpu, id);
682
	}
683
	return vcpu;
684 685
}

686
void kvm_arch_vcpu_postcreate(struct kvm_vcpu *vcpu)
687 688 689
{
}

690 691
void kvm_arch_vcpu_free(struct kvm_vcpu *vcpu)
{
692 693 694
	/* Make sure we're not using the vcpu anymore */
	hrtimer_cancel(&vcpu->arch.dec_timer);

695
	kvmppc_remove_vcpu_debugfs(vcpu);
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696 697 698 699 700

	switch (vcpu->arch.irq_type) {
	case KVMPPC_IRQ_MPIC:
		kvmppc_mpic_disconnect_vcpu(vcpu->arch.mpic, vcpu);
		break;
701 702 703
	case KVMPPC_IRQ_XICS:
		kvmppc_xics_free_icp(vcpu);
		break;
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704 705
	}

706
	kvmppc_core_vcpu_free(vcpu);
707 708 709 710 711 712 713 714 715
}

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

int kvm_cpu_has_pending_timer(struct kvm_vcpu *vcpu)
{
716
	return kvmppc_core_pending_dec(vcpu);
717 718
}

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719
static enum hrtimer_restart kvmppc_decrementer_wakeup(struct hrtimer *timer)
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720 721 722 723
{
	struct kvm_vcpu *vcpu;

	vcpu = container_of(timer, struct kvm_vcpu, arch.dec_timer);
724
	kvmppc_decrementer_func(vcpu);
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725 726 727 728

	return HRTIMER_NORESTART;
}

729 730
int kvm_arch_vcpu_init(struct kvm_vcpu *vcpu)
{
731 732
	int ret;

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Alexander Graf 已提交
733 734
	hrtimer_init(&vcpu->arch.dec_timer, CLOCK_REALTIME, HRTIMER_MODE_ABS);
	vcpu->arch.dec_timer.function = kvmppc_decrementer_wakeup;
735
	vcpu->arch.dec_expires = ~(u64)0;
736

737 738 739
#ifdef CONFIG_KVM_EXIT_TIMING
	mutex_init(&vcpu->arch.exit_timing_lock);
#endif
740 741
	ret = kvmppc_subarch_vcpu_init(vcpu);
	return ret;
742 743 744 745
}

void kvm_arch_vcpu_uninit(struct kvm_vcpu *vcpu)
{
746
	kvmppc_mmu_destroy(vcpu);
747
	kvmppc_subarch_vcpu_uninit(vcpu);
748 749 750 751
}

void kvm_arch_vcpu_load(struct kvm_vcpu *vcpu, int cpu)
{
752 753 754 755 756 757 758 759 760 761
#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
762
	kvmppc_core_vcpu_load(vcpu, cpu);
763 764 765 766
}

void kvm_arch_vcpu_put(struct kvm_vcpu *vcpu)
{
767
	kvmppc_core_vcpu_put(vcpu);
768 769 770
#ifdef CONFIG_BOOKE
	vcpu->arch.vrsave = mfspr(SPRN_VRSAVE);
#endif
771 772
}

773 774 775 776 777 778 779 780 781 782 783 784 785 786 787 788 789 790 791 792 793 794 795 796 797 798 799 800 801 802 803 804 805 806 807 808
/*
 * 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);
}

809 810 811
static void kvmppc_complete_mmio_load(struct kvm_vcpu *vcpu,
                                      struct kvm_run *run)
{
812
	u64 uninitialized_var(gpr);
813

814
	if (run->mmio.len > sizeof(gpr)) {
815 816 817 818
		printk(KERN_ERR "bad MMIO length: %d\n", run->mmio.len);
		return;
	}

819
	if (!vcpu->arch.mmio_host_swabbed) {
820
		switch (run->mmio.len) {
821
		case 8: gpr = *(u64 *)run->mmio.data; break;
822 823 824
		case 4: gpr = *(u32 *)run->mmio.data; break;
		case 2: gpr = *(u16 *)run->mmio.data; break;
		case 1: gpr = *(u8 *)run->mmio.data; break;
825 826 827
		}
	} else {
		switch (run->mmio.len) {
828 829 830
		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;
831
		case 1: gpr = *(u8 *)run->mmio.data; break;
832 833
		}
	}
834

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Alexander Graf 已提交
835 836 837 838 839 840 841 842 843 844 845 846 847 848 849 850
	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;
		}
	}

851
	kvmppc_set_gpr(vcpu, vcpu->arch.io_gpr, gpr);
852

853 854
	switch (vcpu->arch.io_gpr & KVM_MMIO_REG_EXT_MASK) {
	case KVM_MMIO_REG_GPR:
855 856
		kvmppc_set_gpr(vcpu, vcpu->arch.io_gpr, gpr);
		break;
857
	case KVM_MMIO_REG_FPR:
858
		VCPU_FPR(vcpu, vcpu->arch.io_gpr & KVM_MMIO_REG_MASK) = gpr;
859
		break;
860
#ifdef CONFIG_PPC_BOOK3S
861 862
	case KVM_MMIO_REG_QPR:
		vcpu->arch.qpr[vcpu->arch.io_gpr & KVM_MMIO_REG_MASK] = gpr;
863
		break;
864
	case KVM_MMIO_REG_FQPR:
865
		VCPU_FPR(vcpu, vcpu->arch.io_gpr & KVM_MMIO_REG_MASK) = gpr;
866
		vcpu->arch.qpr[vcpu->arch.io_gpr & KVM_MMIO_REG_MASK] = gpr;
867
		break;
868
#endif
869 870 871
	default:
		BUG();
	}
872 873
}

874 875 876
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)
877
{
878
	int idx, ret;
879
	bool host_swabbed;
880

881
	/* Pity C doesn't have a logical XOR operator */
882
	if (kvmppc_need_byteswap(vcpu)) {
883
		host_swabbed = is_default_endian;
884
	} else {
885
		host_swabbed = !is_default_endian;
886
	}
887

888 889 890 891 892 893 894 895 896 897
	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;
898
	vcpu->arch.mmio_host_swabbed = host_swabbed;
899 900
	vcpu->mmio_needed = 1;
	vcpu->mmio_is_write = 0;
901
	vcpu->arch.mmio_sign_extend = sign_extend;
902

903 904
	idx = srcu_read_lock(&vcpu->kvm->srcu);

905
	ret = kvm_io_bus_read(vcpu, KVM_MMIO_BUS, run->mmio.phys_addr,
906 907 908 909 910
			      bytes, &run->mmio.data);

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

	if (!ret) {
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911 912 913 914 915
		kvmppc_complete_mmio_load(vcpu, run);
		vcpu->mmio_needed = 0;
		return EMULATE_DONE;
	}

916 917
	return EMULATE_DO_MMIO;
}
918 919 920 921 922 923 924

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);
}
925
EXPORT_SYMBOL_GPL(kvmppc_handle_load);
926

A
Alexander Graf 已提交
927 928
/* Same as above, but sign extends */
int kvmppc_handle_loads(struct kvm_run *run, struct kvm_vcpu *vcpu,
929 930
			unsigned int rt, unsigned int bytes,
			int is_default_endian)
A
Alexander Graf 已提交
931
{
932
	return __kvmppc_handle_load(run, vcpu, rt, bytes, is_default_endian, 1);
A
Alexander Graf 已提交
933 934
}

935
int kvmppc_handle_store(struct kvm_run *run, struct kvm_vcpu *vcpu,
936
			u64 val, unsigned int bytes, int is_default_endian)
937 938
{
	void *data = run->mmio.data;
939
	int idx, ret;
940
	bool host_swabbed;
941

942
	/* Pity C doesn't have a logical XOR operator */
943
	if (kvmppc_need_byteswap(vcpu)) {
944
		host_swabbed = is_default_endian;
945
	} else {
946
		host_swabbed = !is_default_endian;
947
	}
948 949 950 951 952 953 954 955 956 957 958 959 960

	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;

	/* Store the value at the lowest bytes in 'data'. */
961
	if (!host_swabbed) {
962
		switch (bytes) {
963
		case 8: *(u64 *)data = val; break;
964 965 966 967 968 969
		case 4: *(u32 *)data = val; break;
		case 2: *(u16 *)data = val; break;
		case 1: *(u8  *)data = val; break;
		}
	} else {
		switch (bytes) {
970 971 972 973
		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;
974 975 976
		}
	}

977 978
	idx = srcu_read_lock(&vcpu->kvm->srcu);

979
	ret = kvm_io_bus_write(vcpu, KVM_MMIO_BUS, run->mmio.phys_addr,
980 981 982 983 984
			       bytes, &run->mmio.data);

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

	if (!ret) {
A
Alexander Graf 已提交
985 986 987 988
		vcpu->mmio_needed = 0;
		return EMULATE_DONE;
	}

989 990
	return EMULATE_DO_MMIO;
}
991
EXPORT_SYMBOL_GPL(kvmppc_handle_store);
992

993 994 995 996 997 998 999 1000 1001 1002 1003 1004 1005 1006
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) {
1007 1008 1009 1010 1011 1012
#ifdef CONFIG_ALTIVEC
		case KVM_REG_PPC_VR0 ... KVM_REG_PPC_VR31:
			if (!cpu_has_feature(CPU_FTR_ALTIVEC)) {
				r = -ENXIO;
				break;
			}
1013
			val.vval = vcpu->arch.vr.vr[reg->id - KVM_REG_PPC_VR0];
1014 1015 1016 1017 1018 1019
			break;
		case KVM_REG_PPC_VSCR:
			if (!cpu_has_feature(CPU_FTR_ALTIVEC)) {
				r = -ENXIO;
				break;
			}
1020
			val = get_reg_val(reg->id, vcpu->arch.vr.vscr.u[3]);
1021 1022
			break;
		case KVM_REG_PPC_VRSAVE:
1023
			val = get_reg_val(reg->id, vcpu->arch.vrsave);
1024 1025
			break;
#endif /* CONFIG_ALTIVEC */
1026 1027 1028 1029 1030 1031 1032 1033 1034 1035 1036 1037 1038 1039 1040 1041 1042 1043 1044 1045 1046 1047 1048 1049 1050 1051 1052 1053 1054 1055 1056 1057
		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) {
1058 1059 1060 1061 1062 1063
#ifdef CONFIG_ALTIVEC
		case KVM_REG_PPC_VR0 ... KVM_REG_PPC_VR31:
			if (!cpu_has_feature(CPU_FTR_ALTIVEC)) {
				r = -ENXIO;
				break;
			}
1064
			vcpu->arch.vr.vr[reg->id - KVM_REG_PPC_VR0] = val.vval;
1065 1066 1067 1068 1069 1070
			break;
		case KVM_REG_PPC_VSCR:
			if (!cpu_has_feature(CPU_FTR_ALTIVEC)) {
				r = -ENXIO;
				break;
			}
1071
			vcpu->arch.vr.vscr.u[3] = set_reg_val(reg->id, val);
1072 1073
			break;
		case KVM_REG_PPC_VRSAVE:
1074 1075 1076 1077 1078
			if (!cpu_has_feature(CPU_FTR_ALTIVEC)) {
				r = -ENXIO;
				break;
			}
			vcpu->arch.vrsave = set_reg_val(reg->id, val);
1079 1080
			break;
#endif /* CONFIG_ALTIVEC */
1081 1082 1083 1084 1085 1086 1087 1088 1089
		default:
			r = -EINVAL;
			break;
		}
	}

	return r;
}

1090 1091 1092 1093 1094 1095 1096 1097 1098 1099 1100 1101
int kvm_arch_vcpu_ioctl_run(struct kvm_vcpu *vcpu, struct kvm_run *run)
{
	int r;
	sigset_t sigsaved;

	if (vcpu->sigset_active)
		sigprocmask(SIG_SETMASK, &vcpu->sigset, &sigsaved);

	if (vcpu->mmio_needed) {
		if (!vcpu->mmio_is_write)
			kvmppc_complete_mmio_load(vcpu, run);
		vcpu->mmio_needed = 0;
1102 1103 1104 1105 1106 1107 1108
	} 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;
1109 1110 1111 1112 1113 1114 1115
	} 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;
1116 1117 1118 1119 1120
#ifdef CONFIG_BOOKE
	} else if (vcpu->arch.epr_needed) {
		kvmppc_set_epr(vcpu, run->epr.epr);
		vcpu->arch.epr_needed = 0;
#endif
1121 1122
	}

1123 1124 1125 1126
	if (run->immediate_exit)
		r = -EINTR;
	else
		r = kvmppc_vcpu_run(run, vcpu);
1127 1128 1129 1130 1131 1132 1133 1134 1135

	if (vcpu->sigset_active)
		sigprocmask(SIG_SETMASK, &sigsaved, NULL);

	return r;
}

int kvm_vcpu_ioctl_interrupt(struct kvm_vcpu *vcpu, struct kvm_interrupt *irq)
{
1136
	if (irq->irq == KVM_INTERRUPT_UNSET) {
1137
		kvmppc_core_dequeue_external(vcpu);
1138 1139 1140 1141
		return 0;
	}

	kvmppc_core_queue_external(vcpu, irq);
1142

1143
	kvm_vcpu_kick(vcpu);
1144

1145 1146 1147
	return 0;
}

1148 1149 1150 1151 1152 1153 1154 1155 1156
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) {
1157 1158 1159 1160
	case KVM_CAP_PPC_OSI:
		r = 0;
		vcpu->arch.osi_enabled = true;
		break;
1161 1162 1163 1164
	case KVM_CAP_PPC_PAPR:
		r = 0;
		vcpu->arch.papr_enabled = true;
		break;
1165 1166
	case KVM_CAP_PPC_EPR:
		r = 0;
1167 1168 1169 1170
		if (cap->args[0])
			vcpu->arch.epr_flags |= KVMPPC_EPR_USER;
		else
			vcpu->arch.epr_flags &= ~KVMPPC_EPR_USER;
1171
		break;
1172 1173 1174 1175 1176 1177
#ifdef CONFIG_BOOKE
	case KVM_CAP_PPC_BOOKE_WATCHDOG:
		r = 0;
		vcpu->arch.watchdog_enabled = true;
		break;
#endif
1178
#if defined(CONFIG_KVM_E500V2) || defined(CONFIG_KVM_E500MC)
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Scott Wood 已提交
1179 1180 1181 1182 1183 1184 1185 1186 1187 1188
	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;
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	}
#endif
#ifdef CONFIG_KVM_MPIC
	case KVM_CAP_IRQ_MPIC: {
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		struct fd f;
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		struct kvm_device *dev;

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

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

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		fdput(f);
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		break;
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	}
#endif
1210 1211
#ifdef CONFIG_KVM_XICS
	case KVM_CAP_IRQ_XICS: {
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		struct fd f;
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		struct kvm_device *dev;

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

		r = -EPERM;
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		dev = kvm_device_from_filp(f.file);
1222 1223 1224
		if (dev)
			r = kvmppc_xics_connect_vcpu(dev, vcpu, cap->args[1]);

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		fdput(f);
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		break;
	}
#endif /* CONFIG_KVM_XICS */
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	default:
		r = -EINVAL;
		break;
	}

1234 1235 1236
	if (!r)
		r = kvmppc_sanity_check(vcpu);

1237 1238 1239
	return r;
}

1240 1241 1242 1243 1244 1245 1246 1247 1248 1249 1250 1251 1252
bool kvm_arch_intc_initialized(struct kvm *kvm)
{
#ifdef CONFIG_KVM_MPIC
	if (kvm->arch.mpic)
		return true;
#endif
#ifdef CONFIG_KVM_XICS
	if (kvm->arch.xics)
		return true;
#endif
	return false;
}

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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;
}

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;

1272 1273
	switch (ioctl) {
	case KVM_INTERRUPT: {
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		struct kvm_interrupt irq;
		r = -EFAULT;
		if (copy_from_user(&irq, argp, sizeof(irq)))
1277
			goto out;
1278
		r = kvm_vcpu_ioctl_interrupt(vcpu, &irq);
1279
		goto out;
1280
	}
1281

1282 1283 1284 1285 1286 1287 1288 1289 1290
	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;
	}
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	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;
	}

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#if defined(CONFIG_KVM_E500V2) || defined(CONFIG_KVM_E500MC)
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	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
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	default:
		r = -EINVAL;
	}

out:
	return r;
}

1324 1325 1326 1327 1328
int kvm_arch_vcpu_fault(struct kvm_vcpu *vcpu, struct vm_fault *vmf)
{
	return VM_FAULT_SIGBUS;
}

1329 1330
static int kvm_vm_ioctl_get_pvinfo(struct kvm_ppc_pvinfo *pvinfo)
{
1331 1332 1333
	u32 inst_nop = 0x60000000;
#ifdef CONFIG_KVM_BOOKE_HV
	u32 inst_sc1 = 0x44000022;
1334 1335 1336 1337
	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);
1338
#else
1339 1340 1341 1342 1343 1344 1345 1346 1347 1348 1349 1350 1351 1352
	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
	 */
1353 1354 1355 1356
	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);
1357
#endif
1358

1359 1360
	pvinfo->flags = KVM_PPC_PVINFO_FLAGS_EV_IDLE;

1361 1362 1363
	return 0;
}

1364 1365 1366 1367 1368 1369 1370 1371 1372 1373 1374 1375
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;
}

1376 1377 1378 1379 1380 1381 1382 1383 1384 1385 1386 1387 1388 1389 1390 1391 1392 1393

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;
1394 1395
		if (!kvmppc_book3s_hcall_implemented(kvm, hcall))
			break;
1396 1397 1398 1399 1400 1401 1402 1403 1404 1405 1406 1407 1408 1409 1410 1411
		if (cap->args[1])
			set_bit(hcall / 4, kvm->arch.enabled_hcalls);
		else
			clear_bit(hcall / 4, kvm->arch.enabled_hcalls);
		r = 0;
		break;
	}
#endif
	default:
		r = -EINVAL;
		break;
	}

	return r;
}

1412 1413 1414
long kvm_arch_vm_ioctl(struct file *filp,
                       unsigned int ioctl, unsigned long arg)
{
1415
	struct kvm *kvm __maybe_unused = filp->private_data;
1416
	void __user *argp = (void __user *)arg;
1417 1418 1419
	long r;

	switch (ioctl) {
1420 1421
	case KVM_PPC_GET_PVINFO: {
		struct kvm_ppc_pvinfo pvinfo;
1422
		memset(&pvinfo, 0, sizeof(pvinfo));
1423 1424 1425 1426 1427 1428 1429 1430
		r = kvm_vm_ioctl_get_pvinfo(&pvinfo);
		if (copy_to_user(argp, &pvinfo, sizeof(pvinfo))) {
			r = -EFAULT;
			goto out;
		}

		break;
	}
1431 1432 1433 1434 1435 1436 1437 1438 1439
	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;
	}
1440
#ifdef CONFIG_PPC_BOOK3S_64
1441 1442 1443 1444 1445 1446 1447 1448 1449 1450 1451 1452 1453
	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;
	}
1454 1455
	case KVM_CREATE_SPAPR_TCE: {
		struct kvm_create_spapr_tce create_tce;
1456
		struct kvm_create_spapr_tce_64 create_tce_64;
1457 1458 1459 1460

		r = -EFAULT;
		if (copy_from_user(&create_tce, argp, sizeof(create_tce)))
			goto out;
1461 1462 1463 1464 1465 1466 1467 1468

		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);
1469 1470
		goto out;
	}
1471 1472
	case KVM_PPC_GET_SMMU_INFO: {
		struct kvm_ppc_smmu_info info;
1473
		struct kvm *kvm = filp->private_data;
1474 1475

		memset(&info, 0, sizeof(info));
1476
		r = kvm->arch.kvm_ops->get_smmu_info(kvm, &info);
1477 1478 1479 1480
		if (r >= 0 && copy_to_user(argp, &info, sizeof(info)))
			r = -EFAULT;
		break;
	}
1481 1482 1483 1484 1485 1486
	case KVM_PPC_RTAS_DEFINE_TOKEN: {
		struct kvm *kvm = filp->private_data;

		r = kvm_vm_ioctl_rtas_define_token(kvm, argp);
		break;
	}
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
	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;
	}
1512 1513 1514 1515
	default: {
		struct kvm *kvm = filp->private_data;
		r = kvm->arch.kvm_ops->arch_vm_ioctl(filp, ioctl, arg);
	}
1516
#else /* CONFIG_PPC_BOOK3S_64 */
1517
	default:
1518
		r = -ENOTTY;
1519
#endif
1520
	}
1521
out:
1522 1523 1524
	return r;
}

1525 1526 1527 1528 1529 1530 1531 1532 1533 1534 1535 1536 1537 1538 1539 1540 1541
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;
}
1542
EXPORT_SYMBOL_GPL(kvmppc_alloc_lpid);
1543 1544 1545 1546 1547

void kvmppc_claim_lpid(long lpid)
{
	set_bit(lpid, lpid_inuse);
}
1548
EXPORT_SYMBOL_GPL(kvmppc_claim_lpid);
1549 1550 1551 1552 1553

void kvmppc_free_lpid(long lpid)
{
	clear_bit(lpid, lpid_inuse);
}
1554
EXPORT_SYMBOL_GPL(kvmppc_free_lpid);
1555 1556 1557 1558 1559 1560

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));
}
1561
EXPORT_SYMBOL_GPL(kvmppc_init_lpid);
1562

1563 1564 1565 1566 1567
int kvm_arch_init(void *opaque)
{
	return 0;
}

1568
EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_ppc_instr);