powerpc.c 33.8 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/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>
#include <asm/uaccess.h>
#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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		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_ALLOC_HTAB:
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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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#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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#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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#endif
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	case KVM_CAP_PPC_HTM:
		r = cpu_has_feature(CPU_FTR_TM_COMP) &&
		    is_kvmppc_hv_enabled(kvm);
		break;
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	default:
		r = 0;
		break;
	}
	return r;

}

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

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void kvm_arch_free_memslot(struct kvm *kvm, struct kvm_memory_slot *free,
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			   struct kvm_memory_slot *dont)
{
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	kvmppc_core_free_memslot(kvm, free, dont);
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}

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int kvm_arch_create_memslot(struct kvm *kvm, struct kvm_memory_slot *slot,
			    unsigned long npages)
632
{
633
	return kvmppc_core_create_memslot(kvm, slot, npages);
634 635
}

636
int kvm_arch_prepare_memory_region(struct kvm *kvm,
637
				   struct kvm_memory_slot *memslot,
638
				   const struct kvm_userspace_memory_region *mem,
639
				   enum kvm_mr_change change)
640
{
641
	return kvmppc_core_prepare_memory_region(kvm, memslot, mem);
642 643
}

644
void kvm_arch_commit_memory_region(struct kvm *kvm,
645
				   const struct kvm_userspace_memory_region *mem,
646
				   const struct kvm_memory_slot *old,
647
				   const struct kvm_memory_slot *new,
648
				   enum kvm_mr_change change)
649
{
650
	kvmppc_core_commit_memory_region(kvm, mem, old, new);
651 652
}

653 654
void kvm_arch_flush_shadow_memslot(struct kvm *kvm,
				   struct kvm_memory_slot *slot)
655
{
656
	kvmppc_core_flush_memslot(kvm, slot);
657 658
}

659 660
struct kvm_vcpu *kvm_arch_vcpu_create(struct kvm *kvm, unsigned int id)
{
661 662
	struct kvm_vcpu *vcpu;
	vcpu = kvmppc_core_vcpu_create(kvm, id);
663 664
	if (!IS_ERR(vcpu)) {
		vcpu->arch.wqp = &vcpu->wq;
665
		kvmppc_create_vcpu_debugfs(vcpu, id);
666
	}
667
	return vcpu;
668 669
}

670
void kvm_arch_vcpu_postcreate(struct kvm_vcpu *vcpu)
671 672 673
{
}

674 675
void kvm_arch_vcpu_free(struct kvm_vcpu *vcpu)
{
676 677 678
	/* Make sure we're not using the vcpu anymore */
	hrtimer_cancel(&vcpu->arch.dec_timer);

679
	kvmppc_remove_vcpu_debugfs(vcpu);
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680 681 682 683 684

	switch (vcpu->arch.irq_type) {
	case KVMPPC_IRQ_MPIC:
		kvmppc_mpic_disconnect_vcpu(vcpu->arch.mpic, vcpu);
		break;
685 686 687
	case KVMPPC_IRQ_XICS:
		kvmppc_xics_free_icp(vcpu);
		break;
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688 689
	}

690
	kvmppc_core_vcpu_free(vcpu);
691 692 693 694 695 696 697 698 699
}

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

int kvm_cpu_has_pending_timer(struct kvm_vcpu *vcpu)
{
700
	return kvmppc_core_pending_dec(vcpu);
701 702
}

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703
static enum hrtimer_restart kvmppc_decrementer_wakeup(struct hrtimer *timer)
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704 705 706 707
{
	struct kvm_vcpu *vcpu;

	vcpu = container_of(timer, struct kvm_vcpu, arch.dec_timer);
708
	kvmppc_decrementer_func(vcpu);
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	return HRTIMER_NORESTART;
}

713 714
int kvm_arch_vcpu_init(struct kvm_vcpu *vcpu)
{
715 716
	int ret;

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Alexander Graf 已提交
717 718
	hrtimer_init(&vcpu->arch.dec_timer, CLOCK_REALTIME, HRTIMER_MODE_ABS);
	vcpu->arch.dec_timer.function = kvmppc_decrementer_wakeup;
719
	vcpu->arch.dec_expires = ~(u64)0;
720

721 722 723
#ifdef CONFIG_KVM_EXIT_TIMING
	mutex_init(&vcpu->arch.exit_timing_lock);
#endif
724 725
	ret = kvmppc_subarch_vcpu_init(vcpu);
	return ret;
726 727 728 729
}

void kvm_arch_vcpu_uninit(struct kvm_vcpu *vcpu)
{
730
	kvmppc_mmu_destroy(vcpu);
731
	kvmppc_subarch_vcpu_uninit(vcpu);
732 733 734 735
}

void kvm_arch_vcpu_load(struct kvm_vcpu *vcpu, int cpu)
{
736 737 738 739 740 741 742 743 744 745
#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
746
	kvmppc_core_vcpu_load(vcpu, cpu);
747 748 749 750
}

void kvm_arch_vcpu_put(struct kvm_vcpu *vcpu)
{
751
	kvmppc_core_vcpu_put(vcpu);
752 753 754
#ifdef CONFIG_BOOKE
	vcpu->arch.vrsave = mfspr(SPRN_VRSAVE);
#endif
755 756
}

757 758 759 760 761 762 763 764 765 766 767 768 769 770 771 772 773 774 775 776 777 778 779 780 781 782 783 784 785 786 787 788 789 790 791 792
/*
 * 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);
}

793 794 795
static void kvmppc_complete_mmio_load(struct kvm_vcpu *vcpu,
                                      struct kvm_run *run)
{
796
	u64 uninitialized_var(gpr);
797

798
	if (run->mmio.len > sizeof(gpr)) {
799 800 801 802
		printk(KERN_ERR "bad MMIO length: %d\n", run->mmio.len);
		return;
	}

803
	if (!vcpu->arch.mmio_host_swabbed) {
804
		switch (run->mmio.len) {
805
		case 8: gpr = *(u64 *)run->mmio.data; break;
806 807 808
		case 4: gpr = *(u32 *)run->mmio.data; break;
		case 2: gpr = *(u16 *)run->mmio.data; break;
		case 1: gpr = *(u8 *)run->mmio.data; break;
809 810 811
		}
	} else {
		switch (run->mmio.len) {
812 813 814
		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;
815
		case 1: gpr = *(u8 *)run->mmio.data; break;
816 817
		}
	}
818

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Alexander Graf 已提交
819 820 821 822 823 824 825 826 827 828 829 830 831 832 833 834
	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;
		}
	}

835
	kvmppc_set_gpr(vcpu, vcpu->arch.io_gpr, gpr);
836

837 838
	switch (vcpu->arch.io_gpr & KVM_MMIO_REG_EXT_MASK) {
	case KVM_MMIO_REG_GPR:
839 840
		kvmppc_set_gpr(vcpu, vcpu->arch.io_gpr, gpr);
		break;
841
	case KVM_MMIO_REG_FPR:
842
		VCPU_FPR(vcpu, vcpu->arch.io_gpr & KVM_MMIO_REG_MASK) = gpr;
843
		break;
844
#ifdef CONFIG_PPC_BOOK3S
845 846
	case KVM_MMIO_REG_QPR:
		vcpu->arch.qpr[vcpu->arch.io_gpr & KVM_MMIO_REG_MASK] = gpr;
847
		break;
848
	case KVM_MMIO_REG_FQPR:
849
		VCPU_FPR(vcpu, vcpu->arch.io_gpr & KVM_MMIO_REG_MASK) = gpr;
850
		vcpu->arch.qpr[vcpu->arch.io_gpr & KVM_MMIO_REG_MASK] = gpr;
851
		break;
852
#endif
853 854 855
	default:
		BUG();
	}
856 857
}

858 859 860
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)
861
{
862
	int idx, ret;
863
	bool host_swabbed;
864

865
	/* Pity C doesn't have a logical XOR operator */
866
	if (kvmppc_need_byteswap(vcpu)) {
867
		host_swabbed = is_default_endian;
868
	} else {
869
		host_swabbed = !is_default_endian;
870
	}
871

872 873 874 875 876 877 878 879 880 881
	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;
882
	vcpu->arch.mmio_host_swabbed = host_swabbed;
883 884
	vcpu->mmio_needed = 1;
	vcpu->mmio_is_write = 0;
885
	vcpu->arch.mmio_sign_extend = sign_extend;
886

887 888
	idx = srcu_read_lock(&vcpu->kvm->srcu);

889
	ret = kvm_io_bus_read(vcpu, KVM_MMIO_BUS, run->mmio.phys_addr,
890 891 892 893 894
			      bytes, &run->mmio.data);

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

	if (!ret) {
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895 896 897 898 899
		kvmppc_complete_mmio_load(vcpu, run);
		vcpu->mmio_needed = 0;
		return EMULATE_DONE;
	}

900 901
	return EMULATE_DO_MMIO;
}
902 903 904 905 906 907 908

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);
}
909
EXPORT_SYMBOL_GPL(kvmppc_handle_load);
910

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Alexander Graf 已提交
911 912
/* Same as above, but sign extends */
int kvmppc_handle_loads(struct kvm_run *run, struct kvm_vcpu *vcpu,
913 914
			unsigned int rt, unsigned int bytes,
			int is_default_endian)
A
Alexander Graf 已提交
915
{
916
	return __kvmppc_handle_load(run, vcpu, rt, bytes, is_default_endian, 1);
A
Alexander Graf 已提交
917 918
}

919
int kvmppc_handle_store(struct kvm_run *run, struct kvm_vcpu *vcpu,
920
			u64 val, unsigned int bytes, int is_default_endian)
921 922
{
	void *data = run->mmio.data;
923
	int idx, ret;
924
	bool host_swabbed;
925

926
	/* Pity C doesn't have a logical XOR operator */
927
	if (kvmppc_need_byteswap(vcpu)) {
928
		host_swabbed = is_default_endian;
929
	} else {
930
		host_swabbed = !is_default_endian;
931
	}
932 933 934 935 936 937 938 939 940 941 942 943 944

	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'. */
945
	if (!host_swabbed) {
946
		switch (bytes) {
947
		case 8: *(u64 *)data = val; break;
948 949 950 951 952 953
		case 4: *(u32 *)data = val; break;
		case 2: *(u16 *)data = val; break;
		case 1: *(u8  *)data = val; break;
		}
	} else {
		switch (bytes) {
954 955 956 957
		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;
958 959 960
		}
	}

961 962
	idx = srcu_read_lock(&vcpu->kvm->srcu);

963
	ret = kvm_io_bus_write(vcpu, KVM_MMIO_BUS, run->mmio.phys_addr,
964 965 966 967 968
			       bytes, &run->mmio.data);

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

	if (!ret) {
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Alexander Graf 已提交
969 970 971 972
		vcpu->mmio_needed = 0;
		return EMULATE_DONE;
	}

973 974
	return EMULATE_DO_MMIO;
}
975
EXPORT_SYMBOL_GPL(kvmppc_handle_store);
976

977 978 979 980 981 982 983 984 985 986 987 988 989 990
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) {
991 992 993 994 995 996
#ifdef CONFIG_ALTIVEC
		case KVM_REG_PPC_VR0 ... KVM_REG_PPC_VR31:
			if (!cpu_has_feature(CPU_FTR_ALTIVEC)) {
				r = -ENXIO;
				break;
			}
997
			val.vval = vcpu->arch.vr.vr[reg->id - KVM_REG_PPC_VR0];
998 999 1000 1001 1002 1003
			break;
		case KVM_REG_PPC_VSCR:
			if (!cpu_has_feature(CPU_FTR_ALTIVEC)) {
				r = -ENXIO;
				break;
			}
1004
			val = get_reg_val(reg->id, vcpu->arch.vr.vscr.u[3]);
1005 1006
			break;
		case KVM_REG_PPC_VRSAVE:
1007
			val = get_reg_val(reg->id, vcpu->arch.vrsave);
1008 1009
			break;
#endif /* CONFIG_ALTIVEC */
1010 1011 1012 1013 1014 1015 1016 1017 1018 1019 1020 1021 1022 1023 1024 1025 1026 1027 1028 1029 1030 1031 1032 1033 1034 1035 1036 1037 1038 1039 1040 1041
		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) {
1042 1043 1044 1045 1046 1047
#ifdef CONFIG_ALTIVEC
		case KVM_REG_PPC_VR0 ... KVM_REG_PPC_VR31:
			if (!cpu_has_feature(CPU_FTR_ALTIVEC)) {
				r = -ENXIO;
				break;
			}
1048
			vcpu->arch.vr.vr[reg->id - KVM_REG_PPC_VR0] = val.vval;
1049 1050 1051 1052 1053 1054
			break;
		case KVM_REG_PPC_VSCR:
			if (!cpu_has_feature(CPU_FTR_ALTIVEC)) {
				r = -ENXIO;
				break;
			}
1055
			vcpu->arch.vr.vscr.u[3] = set_reg_val(reg->id, val);
1056 1057
			break;
		case KVM_REG_PPC_VRSAVE:
1058 1059 1060 1061 1062
			if (!cpu_has_feature(CPU_FTR_ALTIVEC)) {
				r = -ENXIO;
				break;
			}
			vcpu->arch.vrsave = set_reg_val(reg->id, val);
1063 1064
			break;
#endif /* CONFIG_ALTIVEC */
1065 1066 1067 1068 1069 1070 1071 1072 1073
		default:
			r = -EINVAL;
			break;
		}
	}

	return r;
}

1074 1075 1076 1077 1078 1079 1080 1081 1082 1083 1084 1085
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;
1086 1087 1088 1089 1090 1091 1092
	} 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;
1093 1094 1095 1096 1097 1098 1099
	} 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;
1100 1101 1102 1103 1104
#ifdef CONFIG_BOOKE
	} else if (vcpu->arch.epr_needed) {
		kvmppc_set_epr(vcpu, run->epr.epr);
		vcpu->arch.epr_needed = 0;
#endif
1105 1106
	}

1107
	r = kvmppc_vcpu_run(run, vcpu);
1108 1109 1110 1111 1112 1113 1114 1115 1116

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

	return r;
}

int kvm_vcpu_ioctl_interrupt(struct kvm_vcpu *vcpu, struct kvm_interrupt *irq)
{
1117
	if (irq->irq == KVM_INTERRUPT_UNSET) {
1118
		kvmppc_core_dequeue_external(vcpu);
1119 1120 1121 1122
		return 0;
	}

	kvmppc_core_queue_external(vcpu, irq);
1123

1124
	kvm_vcpu_kick(vcpu);
1125

1126 1127 1128
	return 0;
}

1129 1130 1131 1132 1133 1134 1135 1136 1137
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) {
1138 1139 1140 1141
	case KVM_CAP_PPC_OSI:
		r = 0;
		vcpu->arch.osi_enabled = true;
		break;
1142 1143 1144 1145
	case KVM_CAP_PPC_PAPR:
		r = 0;
		vcpu->arch.papr_enabled = true;
		break;
1146 1147
	case KVM_CAP_PPC_EPR:
		r = 0;
1148 1149 1150 1151
		if (cap->args[0])
			vcpu->arch.epr_flags |= KVMPPC_EPR_USER;
		else
			vcpu->arch.epr_flags &= ~KVMPPC_EPR_USER;
1152
		break;
1153 1154 1155 1156 1157 1158
#ifdef CONFIG_BOOKE
	case KVM_CAP_PPC_BOOKE_WATCHDOG:
		r = 0;
		vcpu->arch.watchdog_enabled = true;
		break;
#endif
1159
#if defined(CONFIG_KVM_E500V2) || defined(CONFIG_KVM_E500MC)
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1160 1161 1162 1163 1164 1165 1166 1167 1168 1169
	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
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1170 1171 1172 1173
	}
#endif
#ifdef CONFIG_KVM_MPIC
	case KVM_CAP_IRQ_MPIC: {
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Al Viro 已提交
1174
		struct fd f;
S
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1175 1176 1177
		struct kvm_device *dev;

		r = -EBADF;
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Al Viro 已提交
1178 1179
		f = fdget(cap->args[0]);
		if (!f.file)
S
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1180 1181 1182
			break;

		r = -EPERM;
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Al Viro 已提交
1183
		dev = kvm_device_from_filp(f.file);
S
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1184 1185 1186
		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
1191 1192
#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)
1199 1200 1201
			break;

		r = -EPERM;
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		dev = kvm_device_from_filp(f.file);
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		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;
	}

1215 1216 1217
	if (!r)
		r = kvmppc_sanity_check(vcpu);

1218 1219 1220
	return r;
}

1221 1222 1223 1224 1225 1226 1227 1228 1229 1230 1231 1232 1233
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;
}

1234 1235 1236 1237 1238 1239 1240 1241 1242 1243 1244 1245 1246 1247 1248 1249 1250 1251 1252
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;

1253 1254
	switch (ioctl) {
	case KVM_INTERRUPT: {
1255 1256 1257
		struct kvm_interrupt irq;
		r = -EFAULT;
		if (copy_from_user(&irq, argp, sizeof(irq)))
1258
			goto out;
1259
		r = kvm_vcpu_ioctl_interrupt(vcpu, &irq);
1260
		goto out;
1261
	}
1262

1263 1264 1265 1266 1267 1268 1269 1270 1271
	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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1273 1274 1275 1276 1277 1278 1279 1280 1281 1282 1283 1284 1285 1286
	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
1297 1298 1299 1300 1301 1302 1303 1304
	default:
		r = -EINVAL;
	}

out:
	return r;
}

1305 1306 1307 1308 1309
int kvm_arch_vcpu_fault(struct kvm_vcpu *vcpu, struct vm_fault *vmf)
{
	return VM_FAULT_SIGBUS;
}

1310 1311
static int kvm_vm_ioctl_get_pvinfo(struct kvm_ppc_pvinfo *pvinfo)
{
1312 1313 1314
	u32 inst_nop = 0x60000000;
#ifdef CONFIG_KVM_BOOKE_HV
	u32 inst_sc1 = 0x44000022;
1315 1316 1317 1318
	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);
1319
#else
1320 1321 1322 1323 1324 1325 1326 1327 1328 1329 1330 1331 1332 1333
	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
	 */
1334 1335 1336 1337
	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);
1338
#endif
1339

1340 1341
	pvinfo->flags = KVM_PPC_PVINFO_FLAGS_EV_IDLE;

1342 1343 1344
	return 0;
}

1345 1346 1347 1348 1349 1350 1351 1352 1353 1354 1355 1356
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;
}

1357 1358 1359 1360 1361 1362 1363 1364 1365 1366 1367 1368 1369 1370 1371 1372 1373 1374

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;
1375 1376
		if (!kvmppc_book3s_hcall_implemented(kvm, hcall))
			break;
1377 1378 1379 1380 1381 1382 1383 1384 1385 1386 1387 1388 1389 1390 1391 1392
		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;
}

1393 1394 1395
long kvm_arch_vm_ioctl(struct file *filp,
                       unsigned int ioctl, unsigned long arg)
{
1396
	struct kvm *kvm __maybe_unused = filp->private_data;
1397
	void __user *argp = (void __user *)arg;
1398 1399 1400
	long r;

	switch (ioctl) {
1401 1402
	case KVM_PPC_GET_PVINFO: {
		struct kvm_ppc_pvinfo pvinfo;
1403
		memset(&pvinfo, 0, sizeof(pvinfo));
1404 1405 1406 1407 1408 1409 1410 1411
		r = kvm_vm_ioctl_get_pvinfo(&pvinfo);
		if (copy_to_user(argp, &pvinfo, sizeof(pvinfo))) {
			r = -EFAULT;
			goto out;
		}

		break;
	}
1412 1413 1414 1415 1416 1417 1418 1419 1420
	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;
	}
1421
#ifdef CONFIG_PPC_BOOK3S_64
1422 1423 1424 1425 1426 1427 1428 1429 1430 1431 1432 1433 1434
	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;
	}
1435 1436
	case KVM_CREATE_SPAPR_TCE: {
		struct kvm_create_spapr_tce create_tce;
1437
		struct kvm_create_spapr_tce_64 create_tce_64;
1438 1439 1440 1441

		r = -EFAULT;
		if (copy_from_user(&create_tce, argp, sizeof(create_tce)))
			goto out;
1442 1443 1444 1445 1446 1447 1448 1449

		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);
1450 1451
		goto out;
	}
1452 1453
	case KVM_PPC_GET_SMMU_INFO: {
		struct kvm_ppc_smmu_info info;
1454
		struct kvm *kvm = filp->private_data;
1455 1456

		memset(&info, 0, sizeof(info));
1457
		r = kvm->arch.kvm_ops->get_smmu_info(kvm, &info);
1458 1459 1460 1461
		if (r >= 0 && copy_to_user(argp, &info, sizeof(info)))
			r = -EFAULT;
		break;
	}
1462 1463 1464 1465 1466 1467
	case KVM_PPC_RTAS_DEFINE_TOKEN: {
		struct kvm *kvm = filp->private_data;

		r = kvm_vm_ioctl_rtas_define_token(kvm, argp);
		break;
	}
1468 1469 1470 1471
	default: {
		struct kvm *kvm = filp->private_data;
		r = kvm->arch.kvm_ops->arch_vm_ioctl(filp, ioctl, arg);
	}
1472
#else /* CONFIG_PPC_BOOK3S_64 */
1473
	default:
1474
		r = -ENOTTY;
1475
#endif
1476
	}
1477
out:
1478 1479 1480
	return r;
}

1481 1482 1483 1484 1485 1486 1487 1488 1489 1490 1491 1492 1493 1494 1495 1496 1497
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;
}
1498
EXPORT_SYMBOL_GPL(kvmppc_alloc_lpid);
1499 1500 1501 1502 1503

void kvmppc_claim_lpid(long lpid)
{
	set_bit(lpid, lpid_inuse);
}
1504
EXPORT_SYMBOL_GPL(kvmppc_claim_lpid);
1505 1506 1507 1508 1509

void kvmppc_free_lpid(long lpid)
{
	clear_bit(lpid, lpid_inuse);
}
1510
EXPORT_SYMBOL_GPL(kvmppc_free_lpid);
1511 1512 1513 1514 1515 1516

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));
}
1517
EXPORT_SYMBOL_GPL(kvmppc_init_lpid);
1518

1519 1520 1521 1522 1523
int kvm_arch_init(void *opaque)
{
	return 0;
}

1524
EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_ppc_instr);