[linux-2.6-block.git] / arch / powerpc / kvm / booke.c

/*
 * 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/module.h>
#include <linux/vmalloc.h>
#include <linux/fs.h>

#include <asm/cputable.h>
#include <asm/uaccess.h>
#include <asm/kvm_ppc.h>
#include "timing.h"
#include <asm/cacheflush.h>

#include "booke.h"

unsigned long kvmppc_booke_handlers;

#define VM_STAT(x) offsetof(struct kvm, stat.x), KVM_STAT_VM
#define VCPU_STAT(x) offsetof(struct kvm_vcpu, stat.x), KVM_STAT_VCPU

struct kvm_stats_debugfs_item debugfs_entries[] = {
	{ "mmio",       VCPU_STAT(mmio_exits) },
	{ "dcr",        VCPU_STAT(dcr_exits) },
	{ "sig",        VCPU_STAT(signal_exits) },
	{ "itlb_r",     VCPU_STAT(itlb_real_miss_exits) },
	{ "itlb_v",     VCPU_STAT(itlb_virt_miss_exits) },
	{ "dtlb_r",     VCPU_STAT(dtlb_real_miss_exits) },
	{ "dtlb_v",     VCPU_STAT(dtlb_virt_miss_exits) },
	{ "sysc",       VCPU_STAT(syscall_exits) },
	{ "isi",        VCPU_STAT(isi_exits) },
	{ "dsi",        VCPU_STAT(dsi_exits) },
	{ "inst_emu",   VCPU_STAT(emulated_inst_exits) },
	{ "dec",        VCPU_STAT(dec_exits) },
	{ "ext_intr",   VCPU_STAT(ext_intr_exits) },
	{ "halt_wakeup", VCPU_STAT(halt_wakeup) },
	{ NULL }
};

/* TODO: use vcpu_printf() */
void kvmppc_dump_vcpu(struct kvm_vcpu *vcpu)
{
	int i;

	printk("pc:   %08lx msr:  %08lx\n", vcpu->arch.pc, vcpu->arch.msr);
	printk("lr:   %08lx ctr:  %08lx\n", vcpu->arch.lr, vcpu->arch.ctr);
	printk("srr0: %08lx srr1: %08lx\n", vcpu->arch.srr0, vcpu->arch.srr1);

	printk("exceptions: %08lx\n", vcpu->arch.pending_exceptions);

	for (i = 0; i < 32; i += 4) {
		printk("gpr%02d: %08lx %08lx %08lx %08lx\n", i,
		       vcpu->arch.gpr[i],
		       vcpu->arch.gpr[i+1],
		       vcpu->arch.gpr[i+2],
		       vcpu->arch.gpr[i+3]);
	}
}

static void kvmppc_booke_queue_irqprio(struct kvm_vcpu *vcpu,
                                       unsigned int priority)
{
	set_bit(priority, &vcpu->arch.pending_exceptions);
}

void kvmppc_core_queue_program(struct kvm_vcpu *vcpu)
{
	kvmppc_booke_queue_irqprio(vcpu, BOOKE_IRQPRIO_PROGRAM);
}

void kvmppc_core_queue_dec(struct kvm_vcpu *vcpu)
{
	kvmppc_booke_queue_irqprio(vcpu, BOOKE_IRQPRIO_DECREMENTER);
}

int kvmppc_core_pending_dec(struct kvm_vcpu *vcpu)
{
	return test_bit(BOOKE_IRQPRIO_DECREMENTER, &vcpu->arch.pending_exceptions);
}

void kvmppc_core_dequeue_dec(struct kvm_vcpu *vcpu)
{
	clear_bit(BOOKE_IRQPRIO_DECREMENTER, &vcpu->arch.pending_exceptions);
}

void kvmppc_core_queue_external(struct kvm_vcpu *vcpu,
                                struct kvm_interrupt *irq)
{
	kvmppc_booke_queue_irqprio(vcpu, BOOKE_IRQPRIO_EXTERNAL);
}

/* Deliver the interrupt of the corresponding priority, if possible. */
static int kvmppc_booke_irqprio_deliver(struct kvm_vcpu *vcpu,
                                        unsigned int priority)
{
	int allowed = 0;
	ulong msr_mask;

	switch (priority) {
	case BOOKE_IRQPRIO_PROGRAM:
	case BOOKE_IRQPRIO_DTLB_MISS:
	case BOOKE_IRQPRIO_ITLB_MISS:
	case BOOKE_IRQPRIO_SYSCALL:
	case BOOKE_IRQPRIO_DATA_STORAGE:
	case BOOKE_IRQPRIO_INST_STORAGE:
	case BOOKE_IRQPRIO_FP_UNAVAIL:
	case BOOKE_IRQPRIO_SPE_UNAVAIL:
	case BOOKE_IRQPRIO_SPE_FP_DATA:
	case BOOKE_IRQPRIO_SPE_FP_ROUND:
	case BOOKE_IRQPRIO_AP_UNAVAIL:
	case BOOKE_IRQPRIO_ALIGNMENT:
		allowed = 1;
		msr_mask = MSR_CE|MSR_ME|MSR_DE;
		break;
	case BOOKE_IRQPRIO_CRITICAL:
	case BOOKE_IRQPRIO_WATCHDOG:
		allowed = vcpu->arch.msr & MSR_CE;
		msr_mask = MSR_ME;
		break;
	case BOOKE_IRQPRIO_MACHINE_CHECK:
		allowed = vcpu->arch.msr & MSR_ME;
		msr_mask = 0;
		break;
	case BOOKE_IRQPRIO_EXTERNAL:
	case BOOKE_IRQPRIO_DECREMENTER:
	case BOOKE_IRQPRIO_FIT:
		allowed = vcpu->arch.msr & MSR_EE;
		msr_mask = MSR_CE|MSR_ME|MSR_DE;
		break;
	case BOOKE_IRQPRIO_DEBUG:
		allowed = vcpu->arch.msr & MSR_DE;
		msr_mask = MSR_ME;
		break;
	}

	if (allowed) {
		vcpu->arch.srr0 = vcpu->arch.pc;
		vcpu->arch.srr1 = vcpu->arch.msr;
		vcpu->arch.pc = vcpu->arch.ivpr | vcpu->arch.ivor[priority];
		kvmppc_set_msr(vcpu, vcpu->arch.msr & msr_mask);

		clear_bit(priority, &vcpu->arch.pending_exceptions);
	}

	return allowed;
}

/* Check pending exceptions and deliver one, if possible. */
void kvmppc_core_deliver_interrupts(struct kvm_vcpu *vcpu)
{
	unsigned long *pending = &vcpu->arch.pending_exceptions;
	unsigned int priority;

	priority = __ffs(*pending);
	while (priority <= BOOKE_IRQPRIO_MAX) {
		if (kvmppc_booke_irqprio_deliver(vcpu, priority))
			break;

		priority = find_next_bit(pending,
		                         BITS_PER_BYTE * sizeof(*pending),
		                         priority + 1);
	}
}

/**
 * kvmppc_handle_exit
 *
 * Return value is in the form (errcode<<2 | RESUME_FLAG_HOST | RESUME_FLAG_NV)
 */
int kvmppc_handle_exit(struct kvm_run *run, struct kvm_vcpu *vcpu,
                       unsigned int exit_nr)
{
	enum emulation_result er;
	int r = RESUME_HOST;

	/* update before a new last_exit_type is rewritten */
	kvmppc_update_timing_stats(vcpu);

	local_irq_enable();

	run->exit_reason = KVM_EXIT_UNKNOWN;
	run->ready_for_interrupt_injection = 1;

	switch (exit_nr) {
	case BOOKE_INTERRUPT_MACHINE_CHECK:
		printk("MACHINE CHECK: %lx\n", mfspr(SPRN_MCSR));
		kvmppc_dump_vcpu(vcpu);
		r = RESUME_HOST;
		break;

	case BOOKE_INTERRUPT_EXTERNAL:
		kvmppc_account_exit(vcpu, EXT_INTR_EXITS);
		if (need_resched())
			cond_resched();
		r = RESUME_GUEST;
		break;

	case BOOKE_INTERRUPT_DECREMENTER:
		/* Since we switched IVPR back to the host's value, the host
		 * handled this interrupt the moment we enabled interrupts.
		 * Now we just offer it a chance to reschedule the guest. */
		kvmppc_account_exit(vcpu, DEC_EXITS);
		if (need_resched())
			cond_resched();
		r = RESUME_GUEST;
		break;

	case BOOKE_INTERRUPT_PROGRAM:
		if (vcpu->arch.msr & MSR_PR) {
			/* Program traps generated by user-level software must be handled
			 * by the guest kernel. */
			vcpu->arch.esr = vcpu->arch.fault_esr;
			kvmppc_booke_queue_irqprio(vcpu, BOOKE_IRQPRIO_PROGRAM);
			r = RESUME_GUEST;
			kvmppc_account_exit(vcpu, USR_PR_INST);
			break;
		}

		er = kvmppc_emulate_instruction(run, vcpu);
		switch (er) {
		case EMULATE_DONE:
			/* don't overwrite subtypes, just account kvm_stats */
			kvmppc_account_exit_stat(vcpu, EMULATED_INST_EXITS);
			/* Future optimization: only reload non-volatiles if
			 * they were actually modified by emulation. */
			r = RESUME_GUEST_NV;
			break;
		case EMULATE_DO_DCR:
			run->exit_reason = KVM_EXIT_DCR;
			r = RESUME_HOST;
			break;
		case EMULATE_FAIL:
			/* XXX Deliver Program interrupt to guest. */
			printk(KERN_CRIT "%s: emulation at %lx failed (%08x)\n",
			       __func__, vcpu->arch.pc, vcpu->arch.last_inst);
			/* For debugging, encode the failing instruction and
			 * report it to userspace. */
			run->hw.hardware_exit_reason = ~0ULL << 32;
			run->hw.hardware_exit_reason |= vcpu->arch.last_inst;
			r = RESUME_HOST;
			break;
		default:
			BUG();
		}
		break;

	case BOOKE_INTERRUPT_FP_UNAVAIL:
		kvmppc_booke_queue_irqprio(vcpu, BOOKE_IRQPRIO_FP_UNAVAIL);
		kvmppc_account_exit(vcpu, FP_UNAVAIL);
		r = RESUME_GUEST;
		break;

	case BOOKE_INTERRUPT_SPE_UNAVAIL:
		kvmppc_booke_queue_irqprio(vcpu, BOOKE_IRQPRIO_SPE_UNAVAIL);
		r = RESUME_GUEST;
		break;

	case BOOKE_INTERRUPT_SPE_FP_DATA:
		kvmppc_booke_queue_irqprio(vcpu, BOOKE_IRQPRIO_SPE_FP_DATA);
		r = RESUME_GUEST;
		break;

	case BOOKE_INTERRUPT_SPE_FP_ROUND:
		kvmppc_booke_queue_irqprio(vcpu, BOOKE_IRQPRIO_SPE_FP_ROUND);
		r = RESUME_GUEST;
		break;

	case BOOKE_INTERRUPT_DATA_STORAGE:
		vcpu->arch.dear = vcpu->arch.fault_dear;
		vcpu->arch.esr = vcpu->arch.fault_esr;
		kvmppc_booke_queue_irqprio(vcpu, BOOKE_IRQPRIO_DATA_STORAGE);
		kvmppc_account_exit(vcpu, DSI_EXITS);
		r = RESUME_GUEST;
		break;

	case BOOKE_INTERRUPT_INST_STORAGE:
		vcpu->arch.esr = vcpu->arch.fault_esr;
		kvmppc_booke_queue_irqprio(vcpu, BOOKE_IRQPRIO_INST_STORAGE);
		kvmppc_account_exit(vcpu, ISI_EXITS);
		r = RESUME_GUEST;
		break;

	case BOOKE_INTERRUPT_SYSCALL:
		kvmppc_booke_queue_irqprio(vcpu, BOOKE_IRQPRIO_SYSCALL);
		kvmppc_account_exit(vcpu, SYSCALL_EXITS);
		r = RESUME_GUEST;
		break;

	case BOOKE_INTERRUPT_DTLB_MISS: {
		unsigned long eaddr = vcpu->arch.fault_dear;
		int gtlb_index;
		gpa_t gpaddr;
		gfn_t gfn;

		/* Check the guest TLB. */
		gtlb_index = kvmppc_mmu_dtlb_index(vcpu, eaddr);
		if (gtlb_index < 0) {
			/* The guest didn't have a mapping for it. */
			kvmppc_booke_queue_irqprio(vcpu, BOOKE_IRQPRIO_DTLB_MISS);
			vcpu->arch.dear = vcpu->arch.fault_dear;
			vcpu->arch.esr = vcpu->arch.fault_esr;
			kvmppc_mmu_dtlb_miss(vcpu);
			kvmppc_account_exit(vcpu, DTLB_REAL_MISS_EXITS);
			r = RESUME_GUEST;
			break;
		}

		gpaddr = kvmppc_mmu_xlate(vcpu, gtlb_index, eaddr);
		gfn = gpaddr >> PAGE_SHIFT;

		if (kvm_is_visible_gfn(vcpu->kvm, gfn)) {
			/* The guest TLB had a mapping, but the shadow TLB
			 * didn't, and it is RAM. This could be because:
			 * a) the entry is mapping the host kernel, or
			 * b) the guest used a large mapping which we're faking
			 * Either way, we need to satisfy the fault without
			 * invoking the guest. */
			kvmppc_mmu_map(vcpu, eaddr, gpaddr, gtlb_index);
			kvmppc_account_exit(vcpu, DTLB_VIRT_MISS_EXITS);
			r = RESUME_GUEST;
		} else {
			/* Guest has mapped and accessed a page which is not
			 * actually RAM. */
			vcpu->arch.paddr_accessed = gpaddr;
			r = kvmppc_emulate_mmio(run, vcpu);
			kvmppc_account_exit(vcpu, MMIO_EXITS);
		}

		break;
	}

	case BOOKE_INTERRUPT_ITLB_MISS: {
		unsigned long eaddr = vcpu->arch.pc;
		gpa_t gpaddr;
		gfn_t gfn;
		int gtlb_index;

		r = RESUME_GUEST;

		/* Check the guest TLB. */
		gtlb_index = kvmppc_mmu_itlb_index(vcpu, eaddr);
		if (gtlb_index < 0) {
			/* The guest didn't have a mapping for it. */
			kvmppc_booke_queue_irqprio(vcpu, BOOKE_IRQPRIO_ITLB_MISS);
			kvmppc_mmu_itlb_miss(vcpu);
			kvmppc_account_exit(vcpu, ITLB_REAL_MISS_EXITS);
			break;
		}

		kvmppc_account_exit(vcpu, ITLB_VIRT_MISS_EXITS);

		gpaddr = kvmppc_mmu_xlate(vcpu, gtlb_index, eaddr);
		gfn = gpaddr >> PAGE_SHIFT;

		if (kvm_is_visible_gfn(vcpu->kvm, gfn)) {
			/* The guest TLB had a mapping, but the shadow TLB
			 * didn't. This could be because:
			 * a) the entry is mapping the host kernel, or
			 * b) the guest used a large mapping which we're faking
			 * Either way, we need to satisfy the fault without
			 * invoking the guest. */
			kvmppc_mmu_map(vcpu, eaddr, gpaddr, gtlb_index);
		} else {
			/* Guest mapped and leaped at non-RAM! */
			kvmppc_booke_queue_irqprio(vcpu, BOOKE_IRQPRIO_MACHINE_CHECK);
		}

		break;
	}

	case BOOKE_INTERRUPT_DEBUG: {
		u32 dbsr;

		vcpu->arch.pc = mfspr(SPRN_CSRR0);

		/* clear IAC events in DBSR register */
		dbsr = mfspr(SPRN_DBSR);
		dbsr &= DBSR_IAC1 | DBSR_IAC2 | DBSR_IAC3 | DBSR_IAC4;
		mtspr(SPRN_DBSR, dbsr);

		run->exit_reason = KVM_EXIT_DEBUG;
		kvmppc_account_exit(vcpu, DEBUG_EXITS);
		r = RESUME_HOST;
		break;
	}

	default:
		printk(KERN_EMERG "exit_nr %d\n", exit_nr);
		BUG();
	}

	local_irq_disable();

	kvmppc_core_deliver_interrupts(vcpu);

	if (!(r & RESUME_HOST)) {
		/* To avoid clobbering exit_reason, only check for signals if
		 * we aren't already exiting to userspace for some other
		 * reason. */
		if (signal_pending(current)) {
			run->exit_reason = KVM_EXIT_INTR;
			r = (-EINTR << 2) | RESUME_HOST | (r & RESUME_FLAG_NV);
			kvmppc_account_exit(vcpu, SIGNAL_EXITS);
		}
	}

	return r;
}

/* Initial guest state: 16MB mapping 0 -> 0, PC = 0, MSR = 0, R1 = 16MB */
int kvm_arch_vcpu_setup(struct kvm_vcpu *vcpu)
{
	vcpu->arch.pc = 0;
	vcpu->arch.msr = 0;
	vcpu->arch.gpr[1] = (16<<20) - 8; /* -8 for the callee-save LR slot */

	vcpu->arch.shadow_pid = 1;

	/* Eye-catching number so we know if the guest takes an interrupt
	 * before it's programmed its own IVPR. */
	vcpu->arch.ivpr = 0x55550000;

	kvmppc_init_timing_stats(vcpu);

	return kvmppc_core_vcpu_setup(vcpu);
}

int kvm_arch_vcpu_ioctl_get_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs)
{
	int i;

	regs->pc = vcpu->arch.pc;
	regs->cr = vcpu->arch.cr;
	regs->ctr = vcpu->arch.ctr;
	regs->lr = vcpu->arch.lr;
	regs->xer = vcpu->arch.xer;
	regs->msr = vcpu->arch.msr;
	regs->srr0 = vcpu->arch.srr0;
	regs->srr1 = vcpu->arch.srr1;
	regs->pid = vcpu->arch.pid;
	regs->sprg0 = vcpu->arch.sprg0;
	regs->sprg1 = vcpu->arch.sprg1;
	regs->sprg2 = vcpu->arch.sprg2;
	regs->sprg3 = vcpu->arch.sprg3;
	regs->sprg5 = vcpu->arch.sprg4;
	regs->sprg6 = vcpu->arch.sprg5;
	regs->sprg7 = vcpu->arch.sprg6;

	for (i = 0; i < ARRAY_SIZE(regs->gpr); i++)
		regs->gpr[i] = vcpu->arch.gpr[i];

	return 0;
}

int kvm_arch_vcpu_ioctl_set_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs)
{
	int i;

	vcpu->arch.pc = regs->pc;
	vcpu->arch.cr = regs->cr;
	vcpu->arch.ctr = regs->ctr;
	vcpu->arch.lr = regs->lr;
	vcpu->arch.xer = regs->xer;
	kvmppc_set_msr(vcpu, regs->msr);
	vcpu->arch.srr0 = regs->srr0;
	vcpu->arch.srr1 = regs->srr1;
	vcpu->arch.sprg0 = regs->sprg0;
	vcpu->arch.sprg1 = regs->sprg1;
	vcpu->arch.sprg2 = regs->sprg2;
	vcpu->arch.sprg3 = regs->sprg3;
	vcpu->arch.sprg5 = regs->sprg4;
	vcpu->arch.sprg6 = regs->sprg5;
	vcpu->arch.sprg7 = regs->sprg6;

	for (i = 0; i < ARRAY_SIZE(vcpu->arch.gpr); i++)
		vcpu->arch.gpr[i] = regs->gpr[i];

	return 0;
}

int kvm_arch_vcpu_ioctl_get_sregs(struct kvm_vcpu *vcpu,
                                  struct kvm_sregs *sregs)
{
	return -ENOTSUPP;
}

int kvm_arch_vcpu_ioctl_set_sregs(struct kvm_vcpu *vcpu,
                                  struct kvm_sregs *sregs)
{
	return -ENOTSUPP;
}

int kvm_arch_vcpu_ioctl_get_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu)
{
	return -ENOTSUPP;
}

int kvm_arch_vcpu_ioctl_set_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu)
{
	return -ENOTSUPP;
}

int kvm_arch_vcpu_ioctl_translate(struct kvm_vcpu *vcpu,
                                  struct kvm_translation *tr)
{
	return kvmppc_core_vcpu_translate(vcpu, tr);
}

int kvm_vm_ioctl_get_dirty_log(struct kvm *kvm, struct kvm_dirty_log *log)
{
	return -ENOTSUPP;
}

int __init kvmppc_booke_init(void)
{
	unsigned long ivor[16];
	unsigned long max_ivor = 0;
	int i;

	/* We install our own exception handlers by hijacking IVPR. IVPR must
	 * be 16-bit aligned, so we need a 64KB allocation. */
	kvmppc_booke_handlers = __get_free_pages(GFP_KERNEL | __GFP_ZERO,
	                                         VCPU_SIZE_ORDER);
	if (!kvmppc_booke_handlers)
		return -ENOMEM;

	/* XXX make sure our handlers are smaller than Linux's */

	/* Copy our interrupt handlers to match host IVORs. That way we don't
	 * have to swap the IVORs on every guest/host transition. */
	ivor[0] = mfspr(SPRN_IVOR0);
	ivor[1] = mfspr(SPRN_IVOR1);
	ivor[2] = mfspr(SPRN_IVOR2);
	ivor[3] = mfspr(SPRN_IVOR3);
	ivor[4] = mfspr(SPRN_IVOR4);
	ivor[5] = mfspr(SPRN_IVOR5);
	ivor[6] = mfspr(SPRN_IVOR6);
	ivor[7] = mfspr(SPRN_IVOR7);
	ivor[8] = mfspr(SPRN_IVOR8);
	ivor[9] = mfspr(SPRN_IVOR9);
	ivor[10] = mfspr(SPRN_IVOR10);
	ivor[11] = mfspr(SPRN_IVOR11);
	ivor[12] = mfspr(SPRN_IVOR12);
	ivor[13] = mfspr(SPRN_IVOR13);
	ivor[14] = mfspr(SPRN_IVOR14);
	ivor[15] = mfspr(SPRN_IVOR15);

	for (i = 0; i < 16; i++) {
		if (ivor[i] > max_ivor)
			max_ivor = ivor[i];

		memcpy((void *)kvmppc_booke_handlers + ivor[i],
		       kvmppc_handlers_start + i * kvmppc_handler_len,
		       kvmppc_handler_len);
	}
	flush_icache_range(kvmppc_booke_handlers,
	                   kvmppc_booke_handlers + max_ivor + kvmppc_handler_len);

	return 0;
}

void __exit kvmppc_booke_exit(void)
{
	free_pages(kvmppc_booke_handlers, VCPU_SIZE_ORDER);
	kvm_exit();
}
Commit	Line	Data
bbf45ba5 HB	1	/*
	2	* This program is free software; you can redistribute it and/or modify
	3	* it under the terms of the GNU General Public License, version 2, as
	4	* published by the Free Software Foundation.
	5	*
	6	* This program is distributed in the hope that it will be useful,
	7	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	8	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	9	* GNU General Public License for more details.
	10	*
	11	* You should have received a copy of the GNU General Public License
	12	* along with this program; if not, write to the Free Software
	13	* Foundation, 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
	14	*
	15	* Copyright IBM Corp. 2007
	16	*
	17	* Authors: Hollis Blanchard <hollisb@us.ibm.com>
	18	* Christian Ehrhardt <ehrhardt@linux.vnet.ibm.com>
	19	*/
	20
	21	#include <linux/errno.h>
	22	#include <linux/err.h>
	23	#include <linux/kvm_host.h>
	24	#include <linux/module.h>
	25	#include <linux/vmalloc.h>
	26	#include <linux/fs.h>
7924bd41	27
bbf45ba5 HB	28	#include <asm/cputable.h>
	29	#include <asm/uaccess.h>
	30	#include <asm/kvm_ppc.h>
73e75b41	31	#include "timing.h"
d9fbd03d	32	#include <asm/cacheflush.h>
bbf45ba5	33
75f74f0d	34	#include "booke.h"
bbf45ba5	35
d9fbd03d HB	36	unsigned long kvmppc_booke_handlers;
d9fbd03d HB	37
bbf45ba5 HB	38	#define VM_STAT(x) offsetof(struct kvm, stat.x), KVM_STAT_VM
	39	#define VCPU_STAT(x) offsetof(struct kvm_vcpu, stat.x), KVM_STAT_VCPU
	40
	41	struct kvm_stats_debugfs_item debugfs_entries[] = {
bbf45ba5 HB	42	{ "mmio", VCPU_STAT(mmio_exits) },
	43	{ "dcr", VCPU_STAT(dcr_exits) },
	44	{ "sig", VCPU_STAT(signal_exits) },
bbf45ba5 HB	45	{ "itlb_r", VCPU_STAT(itlb_real_miss_exits) },
	46	{ "itlb_v", VCPU_STAT(itlb_virt_miss_exits) },
	47	{ "dtlb_r", VCPU_STAT(dtlb_real_miss_exits) },
	48	{ "dtlb_v", VCPU_STAT(dtlb_virt_miss_exits) },
	49	{ "sysc", VCPU_STAT(syscall_exits) },
	50	{ "isi", VCPU_STAT(isi_exits) },
	51	{ "dsi", VCPU_STAT(dsi_exits) },
	52	{ "inst_emu", VCPU_STAT(emulated_inst_exits) },
	53	{ "dec", VCPU_STAT(dec_exits) },
	54	{ "ext_intr", VCPU_STAT(ext_intr_exits) },
45c5eb67	55	{ "halt_wakeup", VCPU_STAT(halt_wakeup) },
bbf45ba5 HB	56	{ NULL }
	57	};
	58
bbf45ba5 HB	59	/* TODO: use vcpu_printf() */
	60	void kvmppc_dump_vcpu(struct kvm_vcpu *vcpu)
	61	{
	62	int i;
	63
5cf8ca22 HB	64	printk("pc: %08lx msr: %08lx\n", vcpu->arch.pc, vcpu->arch.msr);
	65	printk("lr: %08lx ctr: %08lx\n", vcpu->arch.lr, vcpu->arch.ctr);
	66	printk("srr0: %08lx srr1: %08lx\n", vcpu->arch.srr0, vcpu->arch.srr1);
bbf45ba5 HB	67
	68	printk("exceptions: %08lx\n", vcpu->arch.pending_exceptions);
	69
	70	for (i = 0; i < 32; i += 4) {
5cf8ca22	71	printk("gpr%02d: %08lx %08lx %08lx %08lx\n", i,
bbf45ba5 HB	72	vcpu->arch.gpr[i],
	73	vcpu->arch.gpr[i+1],
	74	vcpu->arch.gpr[i+2],
	75	vcpu->arch.gpr[i+3]);
	76	}
	77	}
	78
d4cf3892 HB	79	static void kvmppc_booke_queue_irqprio(struct kvm_vcpu *vcpu,
d4cf3892 HB	80	unsigned int priority)
9dd921cf	81	{
9dd921cf HB	82	set_bit(priority, &vcpu->arch.pending_exceptions);
	83	}
	84
9dd921cf HB	85	void kvmppc_core_queue_program(struct kvm_vcpu *vcpu)
9dd921cf HB	86	{
d4cf3892	87	kvmppc_booke_queue_irqprio(vcpu, BOOKE_IRQPRIO_PROGRAM);
9dd921cf HB	88	}
	89
	90	void kvmppc_core_queue_dec(struct kvm_vcpu *vcpu)
	91	{
d4cf3892	92	kvmppc_booke_queue_irqprio(vcpu, BOOKE_IRQPRIO_DECREMENTER);
9dd921cf HB	93	}
	94
	95	int kvmppc_core_pending_dec(struct kvm_vcpu *vcpu)
	96	{
d4cf3892	97	return test_bit(BOOKE_IRQPRIO_DECREMENTER, &vcpu->arch.pending_exceptions);
9dd921cf HB	98	}
9dd921cf HB	99
7706664d AG	100	void kvmppc_core_dequeue_dec(struct kvm_vcpu *vcpu)
	101	{
	102	clear_bit(BOOKE_IRQPRIO_DECREMENTER, &vcpu->arch.pending_exceptions);
	103	}
	104
9dd921cf HB	105	void kvmppc_core_queue_external(struct kvm_vcpu *vcpu,
	106	struct kvm_interrupt *irq)
	107	{
d4cf3892	108	kvmppc_booke_queue_irqprio(vcpu, BOOKE_IRQPRIO_EXTERNAL);
9dd921cf HB	109	}
9dd921cf HB	110
d4cf3892 HB	111	/* Deliver the interrupt of the corresponding priority, if possible. */
	112	static int kvmppc_booke_irqprio_deliver(struct kvm_vcpu *vcpu,
	113	unsigned int priority)
bbf45ba5	114	{
d4cf3892 HB	115	int allowed = 0;
	116	ulong msr_mask;
	117
	118	switch (priority) {
	119	case BOOKE_IRQPRIO_PROGRAM:
	120	case BOOKE_IRQPRIO_DTLB_MISS:
	121	case BOOKE_IRQPRIO_ITLB_MISS:
	122	case BOOKE_IRQPRIO_SYSCALL:
	123	case BOOKE_IRQPRIO_DATA_STORAGE:
	124	case BOOKE_IRQPRIO_INST_STORAGE:
	125	case BOOKE_IRQPRIO_FP_UNAVAIL:
bb3a8a17 HB	126	case BOOKE_IRQPRIO_SPE_UNAVAIL:
	127	case BOOKE_IRQPRIO_SPE_FP_DATA:
	128	case BOOKE_IRQPRIO_SPE_FP_ROUND:
d4cf3892 HB	129	case BOOKE_IRQPRIO_AP_UNAVAIL:
	130	case BOOKE_IRQPRIO_ALIGNMENT:
	131	allowed = 1;
	132	msr_mask = MSR_CE\|MSR_ME\|MSR_DE;
bbf45ba5	133	break;
d4cf3892 HB	134	case BOOKE_IRQPRIO_CRITICAL:
	135	case BOOKE_IRQPRIO_WATCHDOG:
	136	allowed = vcpu->arch.msr & MSR_CE;
	137	msr_mask = MSR_ME;
bbf45ba5	138	break;
d4cf3892 HB	139	case BOOKE_IRQPRIO_MACHINE_CHECK:
	140	allowed = vcpu->arch.msr & MSR_ME;
	141	msr_mask = 0;
bbf45ba5	142	break;
d4cf3892 HB	143	case BOOKE_IRQPRIO_EXTERNAL:
	144	case BOOKE_IRQPRIO_DECREMENTER:
	145	case BOOKE_IRQPRIO_FIT:
	146	allowed = vcpu->arch.msr & MSR_EE;
	147	msr_mask = MSR_CE\|MSR_ME\|MSR_DE;
bbf45ba5	148	break;
d4cf3892 HB	149	case BOOKE_IRQPRIO_DEBUG:
	150	allowed = vcpu->arch.msr & MSR_DE;
	151	msr_mask = MSR_ME;
bbf45ba5	152	break;
bbf45ba5 HB	153	}
bbf45ba5 HB	154
d4cf3892 HB	155	if (allowed) {
	156	vcpu->arch.srr0 = vcpu->arch.pc;
	157	vcpu->arch.srr1 = vcpu->arch.msr;
	158	vcpu->arch.pc = vcpu->arch.ivpr \| vcpu->arch.ivor[priority];
	159	kvmppc_set_msr(vcpu, vcpu->arch.msr & msr_mask);
bbf45ba5	160
d4cf3892	161	clear_bit(priority, &vcpu->arch.pending_exceptions);
bbf45ba5 HB	162	}
bbf45ba5 HB	163
d4cf3892	164	return allowed;
bbf45ba5 HB	165	}
	166
	167	/* Check pending exceptions and deliver one, if possible. */
9dd921cf	168	void kvmppc_core_deliver_interrupts(struct kvm_vcpu *vcpu)
bbf45ba5 HB	169	{
bbf45ba5 HB	170	unsigned long *pending = &vcpu->arch.pending_exceptions;
bbf45ba5 HB	171	unsigned int priority;
bbf45ba5 HB	172
9ab80843	173	priority = __ffs(*pending);
bdc89f13	174	while (priority <= BOOKE_IRQPRIO_MAX) {
d4cf3892	175	if (kvmppc_booke_irqprio_deliver(vcpu, priority))
bbf45ba5	176	break;
bbf45ba5 HB	177
	178	priority = find_next_bit(pending,
	179	BITS_PER_BYTE * sizeof(*pending),
	180	priority + 1);
	181	}
	182	}
	183
bbf45ba5 HB	184	/**
	185	* kvmppc_handle_exit
	186	*
	187	* Return value is in the form (errcode<<2 \| RESUME_FLAG_HOST \| RESUME_FLAG_NV)
	188	*/
	189	int kvmppc_handle_exit(struct kvm_run run, struct kvm_vcpu vcpu,
	190	unsigned int exit_nr)
	191	{
	192	enum emulation_result er;
	193	int r = RESUME_HOST;
	194
73e75b41 HB	195	/* update before a new last_exit_type is rewritten */
	196	kvmppc_update_timing_stats(vcpu);
	197
bbf45ba5 HB	198	local_irq_enable();
	199
	200	run->exit_reason = KVM_EXIT_UNKNOWN;
	201	run->ready_for_interrupt_injection = 1;
	202
	203	switch (exit_nr) {
	204	case BOOKE_INTERRUPT_MACHINE_CHECK:
	205	printk("MACHINE CHECK: %lx\n", mfspr(SPRN_MCSR));
	206	kvmppc_dump_vcpu(vcpu);
	207	r = RESUME_HOST;
	208	break;
	209
	210	case BOOKE_INTERRUPT_EXTERNAL:
7b701591	211	kvmppc_account_exit(vcpu, EXT_INTR_EXITS);
1b6766c7 HB	212	if (need_resched())
	213	cond_resched();
	214	r = RESUME_GUEST;
	215	break;
	216
bbf45ba5 HB	217	case BOOKE_INTERRUPT_DECREMENTER:
	218	/* Since we switched IVPR back to the host's value, the host
	219	* handled this interrupt the moment we enabled interrupts.
	220	* Now we just offer it a chance to reschedule the guest. */
7b701591	221	kvmppc_account_exit(vcpu, DEC_EXITS);
bbf45ba5 HB	222	if (need_resched())
bbf45ba5 HB	223	cond_resched();
bbf45ba5 HB	224	r = RESUME_GUEST;
	225	break;
	226
	227	case BOOKE_INTERRUPT_PROGRAM:
	228	if (vcpu->arch.msr & MSR_PR) {
	229	/* Program traps generated by user-level software must be handled
	230	* by the guest kernel. */
	231	vcpu->arch.esr = vcpu->arch.fault_esr;
d4cf3892	232	kvmppc_booke_queue_irqprio(vcpu, BOOKE_IRQPRIO_PROGRAM);
bbf45ba5	233	r = RESUME_GUEST;
7b701591	234	kvmppc_account_exit(vcpu, USR_PR_INST);
bbf45ba5 HB	235	break;
	236	}
	237
	238	er = kvmppc_emulate_instruction(run, vcpu);
	239	switch (er) {
	240	case EMULATE_DONE:
73e75b41	241	/* don't overwrite subtypes, just account kvm_stats */
7b701591	242	kvmppc_account_exit_stat(vcpu, EMULATED_INST_EXITS);
bbf45ba5 HB	243	/* Future optimization: only reload non-volatiles if
bbf45ba5 HB	244	* they were actually modified by emulation. */
bbf45ba5 HB	245	r = RESUME_GUEST_NV;
	246	break;
	247	case EMULATE_DO_DCR:
	248	run->exit_reason = KVM_EXIT_DCR;
	249	r = RESUME_HOST;
	250	break;
	251	case EMULATE_FAIL:
	252	/* XXX Deliver Program interrupt to guest. */
5cf8ca22	253	printk(KERN_CRIT "%s: emulation at %lx failed (%08x)\n",
bbf45ba5 HB	254	__func__, vcpu->arch.pc, vcpu->arch.last_inst);
	255	/* For debugging, encode the failing instruction and
	256	* report it to userspace. */
	257	run->hw.hardware_exit_reason = ~0ULL << 32;
	258	run->hw.hardware_exit_reason \|= vcpu->arch.last_inst;
	259	r = RESUME_HOST;
	260	break;
	261	default:
	262	BUG();
	263	}
	264	break;
	265
de368dce	266	case BOOKE_INTERRUPT_FP_UNAVAIL:
d4cf3892	267	kvmppc_booke_queue_irqprio(vcpu, BOOKE_IRQPRIO_FP_UNAVAIL);
7b701591	268	kvmppc_account_exit(vcpu, FP_UNAVAIL);
de368dce CE	269	r = RESUME_GUEST;
	270	break;
	271
bb3a8a17 HB	272	case BOOKE_INTERRUPT_SPE_UNAVAIL:
	273	kvmppc_booke_queue_irqprio(vcpu, BOOKE_IRQPRIO_SPE_UNAVAIL);
	274	r = RESUME_GUEST;
	275	break;
	276
	277	case BOOKE_INTERRUPT_SPE_FP_DATA:
	278	kvmppc_booke_queue_irqprio(vcpu, BOOKE_IRQPRIO_SPE_FP_DATA);
	279	r = RESUME_GUEST;
	280	break;
	281
	282	case BOOKE_INTERRUPT_SPE_FP_ROUND:
	283	kvmppc_booke_queue_irqprio(vcpu, BOOKE_IRQPRIO_SPE_FP_ROUND);
	284	r = RESUME_GUEST;
	285	break;
	286
bbf45ba5 HB	287	case BOOKE_INTERRUPT_DATA_STORAGE:
	288	vcpu->arch.dear = vcpu->arch.fault_dear;
	289	vcpu->arch.esr = vcpu->arch.fault_esr;
d4cf3892	290	kvmppc_booke_queue_irqprio(vcpu, BOOKE_IRQPRIO_DATA_STORAGE);
7b701591	291	kvmppc_account_exit(vcpu, DSI_EXITS);
bbf45ba5 HB	292	r = RESUME_GUEST;
	293	break;
	294
	295	case BOOKE_INTERRUPT_INST_STORAGE:
	296	vcpu->arch.esr = vcpu->arch.fault_esr;
d4cf3892	297	kvmppc_booke_queue_irqprio(vcpu, BOOKE_IRQPRIO_INST_STORAGE);
7b701591	298	kvmppc_account_exit(vcpu, ISI_EXITS);
bbf45ba5 HB	299	r = RESUME_GUEST;
	300	break;
	301
	302	case BOOKE_INTERRUPT_SYSCALL:
d4cf3892	303	kvmppc_booke_queue_irqprio(vcpu, BOOKE_IRQPRIO_SYSCALL);
7b701591	304	kvmppc_account_exit(vcpu, SYSCALL_EXITS);
bbf45ba5 HB	305	r = RESUME_GUEST;
	306	break;
	307
	308	case BOOKE_INTERRUPT_DTLB_MISS: {
bbf45ba5	309	unsigned long eaddr = vcpu->arch.fault_dear;
7924bd41	310	int gtlb_index;
475e7cdd	311	gpa_t gpaddr;
bbf45ba5 HB	312	gfn_t gfn;
	313
	314	/* Check the guest TLB. */
fa86b8dd	315	gtlb_index = kvmppc_mmu_dtlb_index(vcpu, eaddr);
7924bd41	316	if (gtlb_index < 0) {
bbf45ba5	317	/* The guest didn't have a mapping for it. */
d4cf3892	318	kvmppc_booke_queue_irqprio(vcpu, BOOKE_IRQPRIO_DTLB_MISS);
bbf45ba5 HB	319	vcpu->arch.dear = vcpu->arch.fault_dear;
bbf45ba5 HB	320	vcpu->arch.esr = vcpu->arch.fault_esr;
b52a638c	321	kvmppc_mmu_dtlb_miss(vcpu);
7b701591	322	kvmppc_account_exit(vcpu, DTLB_REAL_MISS_EXITS);
bbf45ba5 HB	323	r = RESUME_GUEST;
	324	break;
	325	}
	326
be8d1cae	327	gpaddr = kvmppc_mmu_xlate(vcpu, gtlb_index, eaddr);
475e7cdd	328	gfn = gpaddr >> PAGE_SHIFT;
bbf45ba5 HB	329
	330	if (kvm_is_visible_gfn(vcpu->kvm, gfn)) {
	331	/* The guest TLB had a mapping, but the shadow TLB
	332	* didn't, and it is RAM. This could be because:
	333	* a) the entry is mapping the host kernel, or
	334	* b) the guest used a large mapping which we're faking
	335	* Either way, we need to satisfy the fault without
	336	* invoking the guest. */
58a96214	337	kvmppc_mmu_map(vcpu, eaddr, gpaddr, gtlb_index);
7b701591	338	kvmppc_account_exit(vcpu, DTLB_VIRT_MISS_EXITS);
bbf45ba5 HB	339	r = RESUME_GUEST;
	340	} else {
	341	/* Guest has mapped and accessed a page which is not
	342	* actually RAM. */
475e7cdd	343	vcpu->arch.paddr_accessed = gpaddr;
bbf45ba5	344	r = kvmppc_emulate_mmio(run, vcpu);
7b701591	345	kvmppc_account_exit(vcpu, MMIO_EXITS);
bbf45ba5 HB	346	}
	347
	348	break;
	349	}
	350
	351	case BOOKE_INTERRUPT_ITLB_MISS: {
bbf45ba5	352	unsigned long eaddr = vcpu->arch.pc;
89168618	353	gpa_t gpaddr;
bbf45ba5	354	gfn_t gfn;
7924bd41	355	int gtlb_index;
bbf45ba5 HB	356
	357	r = RESUME_GUEST;
	358
	359	/* Check the guest TLB. */
fa86b8dd	360	gtlb_index = kvmppc_mmu_itlb_index(vcpu, eaddr);
7924bd41	361	if (gtlb_index < 0) {
bbf45ba5	362	/* The guest didn't have a mapping for it. */
d4cf3892	363	kvmppc_booke_queue_irqprio(vcpu, BOOKE_IRQPRIO_ITLB_MISS);
b52a638c	364	kvmppc_mmu_itlb_miss(vcpu);
7b701591	365	kvmppc_account_exit(vcpu, ITLB_REAL_MISS_EXITS);
bbf45ba5 HB	366	break;
	367	}
	368
7b701591	369	kvmppc_account_exit(vcpu, ITLB_VIRT_MISS_EXITS);
bbf45ba5	370
be8d1cae	371	gpaddr = kvmppc_mmu_xlate(vcpu, gtlb_index, eaddr);
89168618	372	gfn = gpaddr >> PAGE_SHIFT;
bbf45ba5 HB	373
	374	if (kvm_is_visible_gfn(vcpu->kvm, gfn)) {
	375	/* The guest TLB had a mapping, but the shadow TLB
	376	* didn't. This could be because:
	377	* a) the entry is mapping the host kernel, or
	378	* b) the guest used a large mapping which we're faking
	379	* Either way, we need to satisfy the fault without
	380	* invoking the guest. */
58a96214	381	kvmppc_mmu_map(vcpu, eaddr, gpaddr, gtlb_index);
bbf45ba5 HB	382	} else {
bbf45ba5 HB	383	/* Guest mapped and leaped at non-RAM! */
d4cf3892	384	kvmppc_booke_queue_irqprio(vcpu, BOOKE_IRQPRIO_MACHINE_CHECK);
bbf45ba5 HB	385	}
	386
	387	break;
	388	}
	389
6a0ab738 HB	390	case BOOKE_INTERRUPT_DEBUG: {
	391	u32 dbsr;
	392
	393	vcpu->arch.pc = mfspr(SPRN_CSRR0);
	394
	395	/* clear IAC events in DBSR register */
	396	dbsr = mfspr(SPRN_DBSR);
	397	dbsr &= DBSR_IAC1 \| DBSR_IAC2 \| DBSR_IAC3 \| DBSR_IAC4;
	398	mtspr(SPRN_DBSR, dbsr);
	399
	400	run->exit_reason = KVM_EXIT_DEBUG;
7b701591	401	kvmppc_account_exit(vcpu, DEBUG_EXITS);
6a0ab738 HB	402	r = RESUME_HOST;
	403	break;
	404	}
	405
bbf45ba5 HB	406	default:
	407	printk(KERN_EMERG "exit_nr %d\n", exit_nr);
	408	BUG();
	409	}
	410
	411	local_irq_disable();
	412
9dd921cf	413	kvmppc_core_deliver_interrupts(vcpu);
bbf45ba5	414
bbf45ba5 HB	415	if (!(r & RESUME_HOST)) {
	416	/* To avoid clobbering exit_reason, only check for signals if
	417	* we aren't already exiting to userspace for some other
	418	* reason. */
	419	if (signal_pending(current)) {
	420	run->exit_reason = KVM_EXIT_INTR;
	421	r = (-EINTR << 2) \| RESUME_HOST \| (r & RESUME_FLAG_NV);
7b701591	422	kvmppc_account_exit(vcpu, SIGNAL_EXITS);
bbf45ba5 HB	423	}
	424	}
	425
	426	return r;
	427	}
	428
	429	/* Initial guest state: 16MB mapping 0 -> 0, PC = 0, MSR = 0, R1 = 16MB */
	430	int kvm_arch_vcpu_setup(struct kvm_vcpu *vcpu)
	431	{
bbf45ba5 HB	432	vcpu->arch.pc = 0;
	433	vcpu->arch.msr = 0;
	434	vcpu->arch.gpr[1] = (16<<20) - 8; /* -8 for the callee-save LR slot */
	435
49dd2c49 HB	436	vcpu->arch.shadow_pid = 1;
49dd2c49 HB	437
bbf45ba5 HB	438	/* Eye-catching number so we know if the guest takes an interrupt
	439	* before it's programmed its own IVPR. */
	440	vcpu->arch.ivpr = 0x55550000;
	441
73e75b41 HB	442	kvmppc_init_timing_stats(vcpu);
73e75b41 HB	443
5cbb5106	444	return kvmppc_core_vcpu_setup(vcpu);
bbf45ba5 HB	445	}
	446
	447	int kvm_arch_vcpu_ioctl_get_regs(struct kvm_vcpu vcpu, struct kvm_regs regs)
	448	{
	449	int i;
	450
	451	regs->pc = vcpu->arch.pc;
	452	regs->cr = vcpu->arch.cr;
	453	regs->ctr = vcpu->arch.ctr;
	454	regs->lr = vcpu->arch.lr;
	455	regs->xer = vcpu->arch.xer;
	456	regs->msr = vcpu->arch.msr;
	457	regs->srr0 = vcpu->arch.srr0;
	458	regs->srr1 = vcpu->arch.srr1;
	459	regs->pid = vcpu->arch.pid;
	460	regs->sprg0 = vcpu->arch.sprg0;
	461	regs->sprg1 = vcpu->arch.sprg1;
	462	regs->sprg2 = vcpu->arch.sprg2;
	463	regs->sprg3 = vcpu->arch.sprg3;
	464	regs->sprg5 = vcpu->arch.sprg4;
	465	regs->sprg6 = vcpu->arch.sprg5;
	466	regs->sprg7 = vcpu->arch.sprg6;
	467
	468	for (i = 0; i < ARRAY_SIZE(regs->gpr); i++)
	469	regs->gpr[i] = vcpu->arch.gpr[i];
	470
	471	return 0;
	472	}
	473
	474	int kvm_arch_vcpu_ioctl_set_regs(struct kvm_vcpu vcpu, struct kvm_regs regs)
	475	{
	476	int i;
	477
	478	vcpu->arch.pc = regs->pc;
	479	vcpu->arch.cr = regs->cr;
	480	vcpu->arch.ctr = regs->ctr;
	481	vcpu->arch.lr = regs->lr;
	482	vcpu->arch.xer = regs->xer;
b8fd68ac	483	kvmppc_set_msr(vcpu, regs->msr);
bbf45ba5 HB	484	vcpu->arch.srr0 = regs->srr0;
	485	vcpu->arch.srr1 = regs->srr1;
	486	vcpu->arch.sprg0 = regs->sprg0;
	487	vcpu->arch.sprg1 = regs->sprg1;
	488	vcpu->arch.sprg2 = regs->sprg2;
	489	vcpu->arch.sprg3 = regs->sprg3;
	490	vcpu->arch.sprg5 = regs->sprg4;
	491	vcpu->arch.sprg6 = regs->sprg5;
	492	vcpu->arch.sprg7 = regs->sprg6;
	493
	494	for (i = 0; i < ARRAY_SIZE(vcpu->arch.gpr); i++)
	495	vcpu->arch.gpr[i] = regs->gpr[i];
	496
	497	return 0;
	498	}
	499
	500	int kvm_arch_vcpu_ioctl_get_sregs(struct kvm_vcpu *vcpu,
	501	struct kvm_sregs *sregs)
	502	{
	503	return -ENOTSUPP;
	504	}
	505
	506	int kvm_arch_vcpu_ioctl_set_sregs(struct kvm_vcpu *vcpu,
	507	struct kvm_sregs *sregs)
	508	{
	509	return -ENOTSUPP;
	510	}
	511
	512	int kvm_arch_vcpu_ioctl_get_fpu(struct kvm_vcpu vcpu, struct kvm_fpu fpu)
	513	{
	514	return -ENOTSUPP;
	515	}
	516
	517	int kvm_arch_vcpu_ioctl_set_fpu(struct kvm_vcpu vcpu, struct kvm_fpu fpu)
	518	{
	519	return -ENOTSUPP;
	520	}
	521
bbf45ba5 HB	522	int kvm_arch_vcpu_ioctl_translate(struct kvm_vcpu *vcpu,
	523	struct kvm_translation *tr)
	524	{
5cbb5106	525	return kvmppc_core_vcpu_translate(vcpu, tr);
bbf45ba5	526	}
d9fbd03d	527
4e755758 AG	528	int kvm_vm_ioctl_get_dirty_log(struct kvm kvm, struct kvm_dirty_log log)
	529	{
	530	return -ENOTSUPP;
	531	}
	532
2986b8c7	533	int __init kvmppc_booke_init(void)
d9fbd03d HB	534	{
	535	unsigned long ivor[16];
	536	unsigned long max_ivor = 0;
	537	int i;
	538
	539	/* We install our own exception handlers by hijacking IVPR. IVPR must
	540	* be 16-bit aligned, so we need a 64KB allocation. */
	541	kvmppc_booke_handlers = __get_free_pages(GFP_KERNEL \| __GFP_ZERO,
	542	VCPU_SIZE_ORDER);
	543	if (!kvmppc_booke_handlers)
	544	return -ENOMEM;
	545
	546	/* XXX make sure our handlers are smaller than Linux's */
	547
	548	/* Copy our interrupt handlers to match host IVORs. That way we don't
	549	* have to swap the IVORs on every guest/host transition. */
	550	ivor[0] = mfspr(SPRN_IVOR0);
	551	ivor[1] = mfspr(SPRN_IVOR1);
	552	ivor[2] = mfspr(SPRN_IVOR2);
	553	ivor[3] = mfspr(SPRN_IVOR3);
	554	ivor[4] = mfspr(SPRN_IVOR4);
	555	ivor[5] = mfspr(SPRN_IVOR5);
	556	ivor[6] = mfspr(SPRN_IVOR6);
	557	ivor[7] = mfspr(SPRN_IVOR7);
	558	ivor[8] = mfspr(SPRN_IVOR8);
	559	ivor[9] = mfspr(SPRN_IVOR9);
	560	ivor[10] = mfspr(SPRN_IVOR10);
	561	ivor[11] = mfspr(SPRN_IVOR11);
	562	ivor[12] = mfspr(SPRN_IVOR12);
	563	ivor[13] = mfspr(SPRN_IVOR13);
	564	ivor[14] = mfspr(SPRN_IVOR14);
	565	ivor[15] = mfspr(SPRN_IVOR15);
	566
	567	for (i = 0; i < 16; i++) {
	568	if (ivor[i] > max_ivor)
	569	max_ivor = ivor[i];
	570
	571	memcpy((void *)kvmppc_booke_handlers + ivor[i],
	572	kvmppc_handlers_start + i * kvmppc_handler_len,
	573	kvmppc_handler_len);
	574	}
	575	flush_icache_range(kvmppc_booke_handlers,
	576	kvmppc_booke_handlers + max_ivor + kvmppc_handler_len);
	577
db93f574	578	return 0;
d9fbd03d HB	579	}
d9fbd03d HB	580
db93f574	581	void __exit kvmppc_booke_exit(void)
d9fbd03d HB	582	{
	583	free_pages(kvmppc_booke_handlers, VCPU_SIZE_ORDER);
	584	kvm_exit();
	585	}