powerpc.c 31.0 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 <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 "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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		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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		kvm_guest_enter();
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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;

		kvmppc_get_last_inst(vcpu, false, &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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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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	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_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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		if (hv_enabled)
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			r = threads_per_subcore;
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		else
			r = 0;
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		break;
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	case KVM_CAP_PPC_RMA:
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		r = hv_enabled;
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		/* PPC970 requires an RMA */
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		if (r && cpu_has_feature(CPU_FTR_ARCH_201))
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			r = 2;
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		break;
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#endif
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	case KVM_CAP_SYNC_MMU:
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#ifdef CONFIG_KVM_BOOK3S_HV_POSSIBLE
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		if (hv_enabled)
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			r = cpu_has_feature(CPU_FTR_ARCH_206) ? 1 : 0;
		else
			r = 0;
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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;
	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;
#endif
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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)
595
{
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	return kvmppc_core_create_memslot(kvm, slot, npages);
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}

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int kvm_arch_prepare_memory_region(struct kvm *kvm,
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				   struct kvm_memory_slot *memslot,
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				   struct kvm_userspace_memory_region *mem,
				   enum kvm_mr_change change)
603
{
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	return kvmppc_core_prepare_memory_region(kvm, memslot, mem);
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}

607
void kvm_arch_commit_memory_region(struct kvm *kvm,
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				   struct kvm_userspace_memory_region *mem,
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				   const struct kvm_memory_slot *old,
				   enum kvm_mr_change change)
611
{
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	kvmppc_core_commit_memory_region(kvm, mem, old);
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}

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void kvm_arch_flush_shadow_memslot(struct kvm *kvm,
				   struct kvm_memory_slot *slot)
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{
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	kvmppc_core_flush_memslot(kvm, slot);
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}

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struct kvm_vcpu *kvm_arch_vcpu_create(struct kvm *kvm, unsigned int id)
{
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	struct kvm_vcpu *vcpu;
	vcpu = kvmppc_core_vcpu_create(kvm, id);
625 626
	if (!IS_ERR(vcpu)) {
		vcpu->arch.wqp = &vcpu->wq;
627
		kvmppc_create_vcpu_debugfs(vcpu, id);
628
	}
629
	return vcpu;
630 631
}

632 633 634 635 636
int kvm_arch_vcpu_postcreate(struct kvm_vcpu *vcpu)
{
	return 0;
}

637 638
void kvm_arch_vcpu_free(struct kvm_vcpu *vcpu)
{
639 640 641
	/* Make sure we're not using the vcpu anymore */
	hrtimer_cancel(&vcpu->arch.dec_timer);

642
	kvmppc_remove_vcpu_debugfs(vcpu);
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	switch (vcpu->arch.irq_type) {
	case KVMPPC_IRQ_MPIC:
		kvmppc_mpic_disconnect_vcpu(vcpu->arch.mpic, vcpu);
		break;
648 649 650
	case KVMPPC_IRQ_XICS:
		kvmppc_xics_free_icp(vcpu);
		break;
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	}

653
	kvmppc_core_vcpu_free(vcpu);
654 655 656 657 658 659 660 661 662
}

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

int kvm_cpu_has_pending_timer(struct kvm_vcpu *vcpu)
{
663
	return kvmppc_core_pending_dec(vcpu);
664 665
}

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

	vcpu = container_of(timer, struct kvm_vcpu, arch.dec_timer);
671
	kvmppc_decrementer_func(vcpu);
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	return HRTIMER_NORESTART;
}

676 677
int kvm_arch_vcpu_init(struct kvm_vcpu *vcpu)
{
678 679
	int ret;

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	hrtimer_init(&vcpu->arch.dec_timer, CLOCK_REALTIME, HRTIMER_MODE_ABS);
	vcpu->arch.dec_timer.function = kvmppc_decrementer_wakeup;
682
	vcpu->arch.dec_expires = ~(u64)0;
683

684 685 686
#ifdef CONFIG_KVM_EXIT_TIMING
	mutex_init(&vcpu->arch.exit_timing_lock);
#endif
687 688
	ret = kvmppc_subarch_vcpu_init(vcpu);
	return ret;
689 690 691 692
}

void kvm_arch_vcpu_uninit(struct kvm_vcpu *vcpu)
{
693
	kvmppc_mmu_destroy(vcpu);
694
	kvmppc_subarch_vcpu_uninit(vcpu);
695 696 697 698
}

void kvm_arch_vcpu_load(struct kvm_vcpu *vcpu, int cpu)
{
699 700 701 702 703 704 705 706 707 708
#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
709
	kvmppc_core_vcpu_load(vcpu, cpu);
710 711 712 713
}

void kvm_arch_vcpu_put(struct kvm_vcpu *vcpu)
{
714
	kvmppc_core_vcpu_put(vcpu);
715 716 717
#ifdef CONFIG_BOOKE
	vcpu->arch.vrsave = mfspr(SPRN_VRSAVE);
#endif
718 719 720 721 722
}

static void kvmppc_complete_mmio_load(struct kvm_vcpu *vcpu,
                                      struct kvm_run *run)
{
723
	u64 uninitialized_var(gpr);
724

725
	if (run->mmio.len > sizeof(gpr)) {
726 727 728 729 730 731
		printk(KERN_ERR "bad MMIO length: %d\n", run->mmio.len);
		return;
	}

	if (vcpu->arch.mmio_is_bigendian) {
		switch (run->mmio.len) {
732
		case 8: gpr = *(u64 *)run->mmio.data; break;
733 734 735
		case 4: gpr = *(u32 *)run->mmio.data; break;
		case 2: gpr = *(u16 *)run->mmio.data; break;
		case 1: gpr = *(u8 *)run->mmio.data; break;
736 737 738 739
		}
	} else {
		/* Convert BE data from userland back to LE. */
		switch (run->mmio.len) {
740 741 742
		case 4: gpr = ld_le32((u32 *)run->mmio.data); break;
		case 2: gpr = ld_le16((u16 *)run->mmio.data); break;
		case 1: gpr = *(u8 *)run->mmio.data; break;
743 744
		}
	}
745

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	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;
		}
	}

762
	kvmppc_set_gpr(vcpu, vcpu->arch.io_gpr, gpr);
763

764 765
	switch (vcpu->arch.io_gpr & KVM_MMIO_REG_EXT_MASK) {
	case KVM_MMIO_REG_GPR:
766 767
		kvmppc_set_gpr(vcpu, vcpu->arch.io_gpr, gpr);
		break;
768
	case KVM_MMIO_REG_FPR:
769
		VCPU_FPR(vcpu, vcpu->arch.io_gpr & KVM_MMIO_REG_MASK) = gpr;
770
		break;
771
#ifdef CONFIG_PPC_BOOK3S
772 773
	case KVM_MMIO_REG_QPR:
		vcpu->arch.qpr[vcpu->arch.io_gpr & KVM_MMIO_REG_MASK] = gpr;
774
		break;
775
	case KVM_MMIO_REG_FQPR:
776
		VCPU_FPR(vcpu, vcpu->arch.io_gpr & KVM_MMIO_REG_MASK) = gpr;
777
		vcpu->arch.qpr[vcpu->arch.io_gpr & KVM_MMIO_REG_MASK] = gpr;
778
		break;
779
#endif
780 781 782
	default:
		BUG();
	}
783 784 785
}

int kvmppc_handle_load(struct kvm_run *run, struct kvm_vcpu *vcpu,
786 787
		       unsigned int rt, unsigned int bytes,
		       int is_default_endian)
788
{
789
	int idx, ret;
790 791 792 793 794 795 796 797 798
	int is_bigendian;

	if (kvmppc_need_byteswap(vcpu)) {
		/* Default endianness is "little endian". */
		is_bigendian = !is_default_endian;
	} else {
		/* Default endianness is "big endian". */
		is_bigendian = is_default_endian;
	}
799

800 801 802 803 804 805 806 807 808 809 810 811 812
	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;
	vcpu->arch.mmio_is_bigendian = is_bigendian;
	vcpu->mmio_needed = 1;
	vcpu->mmio_is_write = 0;
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	vcpu->arch.mmio_sign_extend = 0;
814

815 816 817 818 819 820 821 822
	idx = srcu_read_lock(&vcpu->kvm->srcu);

	ret = kvm_io_bus_read(vcpu->kvm, KVM_MMIO_BUS, run->mmio.phys_addr,
			      bytes, &run->mmio.data);

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

	if (!ret) {
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		kvmppc_complete_mmio_load(vcpu, run);
		vcpu->mmio_needed = 0;
		return EMULATE_DONE;
	}

828 829
	return EMULATE_DO_MMIO;
}
830
EXPORT_SYMBOL_GPL(kvmppc_handle_load);
831

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832 833
/* Same as above, but sign extends */
int kvmppc_handle_loads(struct kvm_run *run, struct kvm_vcpu *vcpu,
834 835
			unsigned int rt, unsigned int bytes,
			int is_default_endian)
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{
	int r;

	vcpu->arch.mmio_sign_extend = 1;
840
	r = kvmppc_handle_load(run, vcpu, rt, bytes, is_default_endian);
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	return r;
}

845
int kvmppc_handle_store(struct kvm_run *run, struct kvm_vcpu *vcpu,
846
			u64 val, unsigned int bytes, int is_default_endian)
847 848
{
	void *data = run->mmio.data;
849
	int idx, ret;
850 851 852 853 854 855 856 857 858
	int is_bigendian;

	if (kvmppc_need_byteswap(vcpu)) {
		/* Default endianness is "little endian". */
		is_bigendian = !is_default_endian;
	} else {
		/* Default endianness is "big endian". */
		is_bigendian = is_default_endian;
	}
859 860 861 862 863 864 865 866 867 868 869 870 871 872 873

	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'. */
	if (is_bigendian) {
		switch (bytes) {
874
		case 8: *(u64 *)data = val; break;
875 876 877 878 879 880 881 882 883 884 885 886 887
		case 4: *(u32 *)data = val; break;
		case 2: *(u16 *)data = val; break;
		case 1: *(u8  *)data = val; break;
		}
	} else {
		/* Store LE value into 'data'. */
		switch (bytes) {
		case 4: st_le32(data, val); break;
		case 2: st_le16(data, val); break;
		case 1: *(u8 *)data = val; break;
		}
	}

888 889 890 891 892 893 894 895
	idx = srcu_read_lock(&vcpu->kvm->srcu);

	ret = kvm_io_bus_write(vcpu->kvm, KVM_MMIO_BUS, run->mmio.phys_addr,
			       bytes, &run->mmio.data);

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

	if (!ret) {
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		vcpu->mmio_needed = 0;
		return EMULATE_DONE;
	}

900 901
	return EMULATE_DO_MMIO;
}
902
EXPORT_SYMBOL_GPL(kvmppc_handle_store);
903

904 905 906 907 908 909 910 911 912 913 914 915 916 917
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) {
918 919 920 921 922 923 924 925 926 927 928 929 930 931 932 933 934 935 936 937 938 939 940
#ifdef CONFIG_ALTIVEC
		case KVM_REG_PPC_VR0 ... KVM_REG_PPC_VR31:
			if (!cpu_has_feature(CPU_FTR_ALTIVEC)) {
				r = -ENXIO;
				break;
			}
			vcpu->arch.vr.vr[reg->id - KVM_REG_PPC_VR0] = val.vval;
			break;
		case KVM_REG_PPC_VSCR:
			if (!cpu_has_feature(CPU_FTR_ALTIVEC)) {
				r = -ENXIO;
				break;
			}
			vcpu->arch.vr.vscr.u[3] = set_reg_val(reg->id, val);
			break;
		case KVM_REG_PPC_VRSAVE:
			if (!cpu_has_feature(CPU_FTR_ALTIVEC)) {
				r = -ENXIO;
				break;
			}
			vcpu->arch.vrsave = set_reg_val(reg->id, val);
			break;
#endif /* CONFIG_ALTIVEC */
941 942 943 944 945 946 947 948 949 950 951 952 953 954 955 956 957 958 959 960 961 962 963 964 965 966 967 968 969 970 971 972
		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) {
973 974 975 976 977 978 979 980 981 982 983 984 985 986 987 988 989 990 991
#ifdef CONFIG_ALTIVEC
		case KVM_REG_PPC_VR0 ... KVM_REG_PPC_VR31:
			if (!cpu_has_feature(CPU_FTR_ALTIVEC)) {
				r = -ENXIO;
				break;
			}
			val.vval = vcpu->arch.vr.vr[reg->id - KVM_REG_PPC_VR0];
			break;
		case KVM_REG_PPC_VSCR:
			if (!cpu_has_feature(CPU_FTR_ALTIVEC)) {
				r = -ENXIO;
				break;
			}
			val = get_reg_val(reg->id, vcpu->arch.vr.vscr.u[3]);
			break;
		case KVM_REG_PPC_VRSAVE:
			val = get_reg_val(reg->id, vcpu->arch.vrsave);
			break;
#endif /* CONFIG_ALTIVEC */
992 993 994 995 996 997 998 999 1000
		default:
			r = -EINVAL;
			break;
		}
	}

	return r;
}

1001 1002 1003 1004 1005 1006 1007 1008 1009 1010 1011 1012
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;
1013 1014 1015 1016 1017 1018 1019
	} 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;
1020 1021 1022 1023 1024 1025 1026
	} 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;
1027 1028 1029 1030 1031
#ifdef CONFIG_BOOKE
	} else if (vcpu->arch.epr_needed) {
		kvmppc_set_epr(vcpu, run->epr.epr);
		vcpu->arch.epr_needed = 0;
#endif
1032 1033
	}

1034
	r = kvmppc_vcpu_run(run, vcpu);
1035 1036 1037 1038 1039 1040 1041 1042 1043

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

	return r;
}

int kvm_vcpu_ioctl_interrupt(struct kvm_vcpu *vcpu, struct kvm_interrupt *irq)
{
1044
	if (irq->irq == KVM_INTERRUPT_UNSET) {
1045
		kvmppc_core_dequeue_external(vcpu);
1046 1047 1048 1049
		return 0;
	}

	kvmppc_core_queue_external(vcpu, irq);
1050

1051
	kvm_vcpu_kick(vcpu);
1052

1053 1054 1055
	return 0;
}

1056 1057 1058 1059 1060 1061 1062 1063 1064
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) {
1065 1066 1067 1068
	case KVM_CAP_PPC_OSI:
		r = 0;
		vcpu->arch.osi_enabled = true;
		break;
1069 1070 1071 1072
	case KVM_CAP_PPC_PAPR:
		r = 0;
		vcpu->arch.papr_enabled = true;
		break;
1073 1074
	case KVM_CAP_PPC_EPR:
		r = 0;
1075 1076 1077 1078
		if (cap->args[0])
			vcpu->arch.epr_flags |= KVMPPC_EPR_USER;
		else
			vcpu->arch.epr_flags &= ~KVMPPC_EPR_USER;
1079
		break;
1080 1081 1082 1083 1084 1085
#ifdef CONFIG_BOOKE
	case KVM_CAP_PPC_BOOKE_WATCHDOG:
		r = 0;
		vcpu->arch.watchdog_enabled = true;
		break;
#endif
1086
#if defined(CONFIG_KVM_E500V2) || defined(CONFIG_KVM_E500MC)
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1087 1088 1089 1090 1091 1092 1093 1094 1095 1096
	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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1097 1098 1099 1100
	}
#endif
#ifdef CONFIG_KVM_MPIC
	case KVM_CAP_IRQ_MPIC: {
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Al Viro 已提交
1101
		struct fd f;
S
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1102 1103 1104
		struct kvm_device *dev;

		r = -EBADF;
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Al Viro 已提交
1105 1106
		f = fdget(cap->args[0]);
		if (!f.file)
S
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1107 1108 1109
			break;

		r = -EPERM;
A
Al Viro 已提交
1110
		dev = kvm_device_from_filp(f.file);
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1111 1112 1113
		if (dev)
			r = kvmppc_mpic_connect_vcpu(dev, vcpu, cap->args[1]);

A
Al Viro 已提交
1114
		fdput(f);
S
Scott Wood 已提交
1115
		break;
S
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1116 1117
	}
#endif
1118 1119
#ifdef CONFIG_KVM_XICS
	case KVM_CAP_IRQ_XICS: {
A
Al Viro 已提交
1120
		struct fd f;
1121 1122 1123
		struct kvm_device *dev;

		r = -EBADF;
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Al Viro 已提交
1124 1125
		f = fdget(cap->args[0]);
		if (!f.file)
1126 1127 1128
			break;

		r = -EPERM;
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1129
		dev = kvm_device_from_filp(f.file);
1130 1131 1132
		if (dev)
			r = kvmppc_xics_connect_vcpu(dev, vcpu, cap->args[1]);

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Al Viro 已提交
1133
		fdput(f);
1134 1135 1136
		break;
	}
#endif /* CONFIG_KVM_XICS */
1137 1138 1139 1140 1141
	default:
		r = -EINVAL;
		break;
	}

1142 1143 1144
	if (!r)
		r = kvmppc_sanity_check(vcpu);

1145 1146 1147
	return r;
}

1148 1149 1150 1151 1152 1153 1154 1155 1156 1157 1158 1159 1160 1161 1162 1163 1164 1165 1166
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;

1167 1168
	switch (ioctl) {
	case KVM_INTERRUPT: {
1169 1170 1171
		struct kvm_interrupt irq;
		r = -EFAULT;
		if (copy_from_user(&irq, argp, sizeof(irq)))
1172
			goto out;
1173
		r = kvm_vcpu_ioctl_interrupt(vcpu, &irq);
1174
		goto out;
1175
	}
1176

1177 1178 1179 1180 1181 1182 1183 1184 1185
	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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1187 1188 1189 1190 1191 1192 1193 1194 1195 1196 1197 1198 1199 1200
	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;
	}

1201
#if defined(CONFIG_KVM_E500V2) || defined(CONFIG_KVM_E500MC)
S
Scott Wood 已提交
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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
1211 1212 1213 1214 1215 1216 1217 1218
	default:
		r = -EINVAL;
	}

out:
	return r;
}

1219 1220 1221 1222 1223
int kvm_arch_vcpu_fault(struct kvm_vcpu *vcpu, struct vm_fault *vmf)
{
	return VM_FAULT_SIGBUS;
}

1224 1225
static int kvm_vm_ioctl_get_pvinfo(struct kvm_ppc_pvinfo *pvinfo)
{
1226 1227 1228
	u32 inst_nop = 0x60000000;
#ifdef CONFIG_KVM_BOOKE_HV
	u32 inst_sc1 = 0x44000022;
1229 1230 1231 1232
	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);
1233
#else
1234 1235 1236 1237 1238 1239 1240 1241 1242 1243 1244 1245 1246 1247
	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
	 */
1248 1249 1250 1251
	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);
1252
#endif
1253

1254 1255
	pvinfo->flags = KVM_PPC_PVINFO_FLAGS_EV_IDLE;

1256 1257 1258
	return 0;
}

1259 1260 1261 1262 1263 1264 1265 1266 1267 1268 1269 1270
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;
}

1271 1272 1273 1274 1275 1276 1277 1278 1279 1280 1281 1282 1283 1284 1285 1286 1287 1288

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;
1289 1290
		if (!kvmppc_book3s_hcall_implemented(kvm, hcall))
			break;
1291 1292 1293 1294 1295 1296 1297 1298 1299 1300 1301 1302 1303 1304 1305 1306
		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;
}

1307 1308 1309
long kvm_arch_vm_ioctl(struct file *filp,
                       unsigned int ioctl, unsigned long arg)
{
1310
	struct kvm *kvm __maybe_unused = filp->private_data;
1311
	void __user *argp = (void __user *)arg;
1312 1313 1314
	long r;

	switch (ioctl) {
1315 1316
	case KVM_PPC_GET_PVINFO: {
		struct kvm_ppc_pvinfo pvinfo;
1317
		memset(&pvinfo, 0, sizeof(pvinfo));
1318 1319 1320 1321 1322 1323 1324 1325
		r = kvm_vm_ioctl_get_pvinfo(&pvinfo);
		if (copy_to_user(argp, &pvinfo, sizeof(pvinfo))) {
			r = -EFAULT;
			goto out;
		}

		break;
	}
1326 1327 1328 1329 1330 1331 1332 1333 1334
	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;
	}
1335
#ifdef CONFIG_PPC_BOOK3S_64
1336 1337 1338 1339 1340 1341 1342 1343 1344
	case KVM_CREATE_SPAPR_TCE: {
		struct kvm_create_spapr_tce create_tce;

		r = -EFAULT;
		if (copy_from_user(&create_tce, argp, sizeof(create_tce)))
			goto out;
		r = kvm_vm_ioctl_create_spapr_tce(kvm, &create_tce);
		goto out;
	}
1345 1346
	case KVM_PPC_GET_SMMU_INFO: {
		struct kvm_ppc_smmu_info info;
1347
		struct kvm *kvm = filp->private_data;
1348 1349

		memset(&info, 0, sizeof(info));
1350
		r = kvm->arch.kvm_ops->get_smmu_info(kvm, &info);
1351 1352 1353 1354
		if (r >= 0 && copy_to_user(argp, &info, sizeof(info)))
			r = -EFAULT;
		break;
	}
1355 1356 1357 1358 1359 1360
	case KVM_PPC_RTAS_DEFINE_TOKEN: {
		struct kvm *kvm = filp->private_data;

		r = kvm_vm_ioctl_rtas_define_token(kvm, argp);
		break;
	}
1361 1362 1363 1364
	default: {
		struct kvm *kvm = filp->private_data;
		r = kvm->arch.kvm_ops->arch_vm_ioctl(filp, ioctl, arg);
	}
1365
#else /* CONFIG_PPC_BOOK3S_64 */
1366
	default:
1367
		r = -ENOTTY;
1368
#endif
1369
	}
1370
out:
1371 1372 1373
	return r;
}

1374 1375 1376 1377 1378 1379 1380 1381 1382 1383 1384 1385 1386 1387 1388 1389 1390
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;
}
1391
EXPORT_SYMBOL_GPL(kvmppc_alloc_lpid);
1392 1393 1394 1395 1396

void kvmppc_claim_lpid(long lpid)
{
	set_bit(lpid, lpid_inuse);
}
1397
EXPORT_SYMBOL_GPL(kvmppc_claim_lpid);
1398 1399 1400 1401 1402

void kvmppc_free_lpid(long lpid)
{
	clear_bit(lpid, lpid_inuse);
}
1403
EXPORT_SYMBOL_GPL(kvmppc_free_lpid);
1404 1405 1406 1407 1408 1409

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));
}
1410
EXPORT_SYMBOL_GPL(kvmppc_init_lpid);
1411

1412 1413 1414 1415 1416
int kvm_arch_init(void *opaque)
{
	return 0;
}

1417
EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_ppc_instr);