[net-next-2.6.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/gfp.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,
		       kvmppc_get_gpr(vcpu, i),
		       kvmppc_get_gpr(vcpu, i+1),
		       kvmppc_get_gpr(vcpu, i+2),
		       kvmppc_get_gpr(vcpu, i+3));
	}
}

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

static void kvmppc_core_queue_dtlb_miss(struct kvm_vcpu *vcpu,
                                        ulong dear_flags, ulong esr_flags)
{
	vcpu->arch.queued_dear = dear_flags;
	vcpu->arch.queued_esr = esr_flags;
	kvmppc_booke_queue_irqprio(vcpu, BOOKE_IRQPRIO_DTLB_MISS);
}

static void kvmppc_core_queue_data_storage(struct kvm_vcpu *vcpu,
                                           ulong dear_flags, ulong esr_flags)
{
	vcpu->arch.queued_dear = dear_flags;
	vcpu->arch.queued_esr = esr_flags;
	kvmppc_booke_queue_irqprio(vcpu, BOOKE_IRQPRIO_DATA_STORAGE);
}

static void kvmppc_core_queue_inst_storage(struct kvm_vcpu *vcpu,
                                           ulong esr_flags)
{
	vcpu->arch.queued_esr = esr_flags;
	kvmppc_booke_queue_irqprio(vcpu, BOOKE_IRQPRIO_INST_STORAGE);
}

void kvmppc_core_queue_program(struct kvm_vcpu *vcpu, ulong esr_flags)
{
	vcpu->arch.queued_esr = esr_flags;
	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;
	bool update_esr = false, update_dear = false;

	switch (priority) {
	case BOOKE_IRQPRIO_DTLB_MISS:
	case BOOKE_IRQPRIO_DATA_STORAGE:
		update_dear = true;
		/* fall through */
	case BOOKE_IRQPRIO_INST_STORAGE:
	case BOOKE_IRQPRIO_PROGRAM:
		update_esr = true;
		/* fall through */
	case BOOKE_IRQPRIO_ITLB_MISS:
	case BOOKE_IRQPRIO_SYSCALL:
	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];
		if (update_esr == true)
			vcpu->arch.esr = vcpu->arch.queued_esr;
		if (update_dear == true)
			vcpu->arch.dear = vcpu->arch.queued_dear;
		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. */
			kvmppc_core_queue_program(vcpu, vcpu->arch.fault_esr);
			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:
		kvmppc_core_queue_data_storage(vcpu, vcpu->arch.fault_dear,
		                               vcpu->arch.fault_esr);
		kvmppc_account_exit(vcpu, DSI_EXITS);
		r = RESUME_GUEST;
		break;

	case BOOKE_INTERRUPT_INST_STORAGE:
		kvmppc_core_queue_inst_storage(vcpu, vcpu->arch.fault_esr);
		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_core_queue_dtlb_miss(vcpu,
			                            vcpu->arch.fault_dear,
			                            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;
	kvmppc_set_gpr(vcpu, 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 = kvmppc_get_cr(vcpu);
	regs->ctr = vcpu->arch.ctr;
	regs->lr = vcpu->arch.lr;
	regs->xer = kvmppc_get_xer(vcpu);
	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] = kvmppc_get_gpr(vcpu, 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;
	kvmppc_set_cr(vcpu, regs->cr);
	vcpu->arch.ctr = regs->ctr;
	vcpu->arch.lr = regs->lr;
	kvmppc_set_xer(vcpu, 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(regs->gpr); i++)
		kvmppc_set_gpr(vcpu, 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>
5a0e3ad6	24	#include <linux/gfp.h>
bbf45ba5 HB	25	#include <linux/module.h>
	26	#include <linux/vmalloc.h>
	27	#include <linux/fs.h>
7924bd41	28
bbf45ba5 HB	29	#include <asm/cputable.h>
	30	#include <asm/uaccess.h>
	31	#include <asm/kvm_ppc.h>
73e75b41	32	#include "timing.h"
d9fbd03d	33	#include <asm/cacheflush.h>
bbf45ba5	34
75f74f0d	35	#include "booke.h"
bbf45ba5	36
d9fbd03d HB	37	unsigned long kvmppc_booke_handlers;
d9fbd03d HB	38
bbf45ba5 HB	39	#define VM_STAT(x) offsetof(struct kvm, stat.x), KVM_STAT_VM
	40	#define VCPU_STAT(x) offsetof(struct kvm_vcpu, stat.x), KVM_STAT_VCPU
	41
	42	struct kvm_stats_debugfs_item debugfs_entries[] = {
bbf45ba5 HB	43	{ "mmio", VCPU_STAT(mmio_exits) },
	44	{ "dcr", VCPU_STAT(dcr_exits) },
	45	{ "sig", VCPU_STAT(signal_exits) },
bbf45ba5 HB	46	{ "itlb_r", VCPU_STAT(itlb_real_miss_exits) },
	47	{ "itlb_v", VCPU_STAT(itlb_virt_miss_exits) },
	48	{ "dtlb_r", VCPU_STAT(dtlb_real_miss_exits) },
	49	{ "dtlb_v", VCPU_STAT(dtlb_virt_miss_exits) },
	50	{ "sysc", VCPU_STAT(syscall_exits) },
	51	{ "isi", VCPU_STAT(isi_exits) },
	52	{ "dsi", VCPU_STAT(dsi_exits) },
	53	{ "inst_emu", VCPU_STAT(emulated_inst_exits) },
	54	{ "dec", VCPU_STAT(dec_exits) },
	55	{ "ext_intr", VCPU_STAT(ext_intr_exits) },
45c5eb67	56	{ "halt_wakeup", VCPU_STAT(halt_wakeup) },
bbf45ba5 HB	57	{ NULL }
	58	};
	59
bbf45ba5 HB	60	/* TODO: use vcpu_printf() */
	61	void kvmppc_dump_vcpu(struct kvm_vcpu *vcpu)
	62	{
	63	int i;
	64
5cf8ca22 HB	65	printk("pc: %08lx msr: %08lx\n", vcpu->arch.pc, vcpu->arch.msr);
	66	printk("lr: %08lx ctr: %08lx\n", vcpu->arch.lr, vcpu->arch.ctr);
	67	printk("srr0: %08lx srr1: %08lx\n", vcpu->arch.srr0, vcpu->arch.srr1);
bbf45ba5 HB	68
	69	printk("exceptions: %08lx\n", vcpu->arch.pending_exceptions);
	70
	71	for (i = 0; i < 32; i += 4) {
5cf8ca22	72	printk("gpr%02d: %08lx %08lx %08lx %08lx\n", i,
8e5b26b5 AG	73	kvmppc_get_gpr(vcpu, i),
	74	kvmppc_get_gpr(vcpu, i+1),
	75	kvmppc_get_gpr(vcpu, i+2),
	76	kvmppc_get_gpr(vcpu, i+3));
bbf45ba5 HB	77	}
	78	}
	79
d4cf3892 HB	80	static void kvmppc_booke_queue_irqprio(struct kvm_vcpu *vcpu,
d4cf3892 HB	81	unsigned int priority)
9dd921cf	82	{
9dd921cf HB	83	set_bit(priority, &vcpu->arch.pending_exceptions);
	84	}
	85
daf5e271 LY	86	static void kvmppc_core_queue_dtlb_miss(struct kvm_vcpu *vcpu,
daf5e271 LY	87	ulong dear_flags, ulong esr_flags)
9dd921cf	88	{
daf5e271 LY	89	vcpu->arch.queued_dear = dear_flags;
	90	vcpu->arch.queued_esr = esr_flags;
	91	kvmppc_booke_queue_irqprio(vcpu, BOOKE_IRQPRIO_DTLB_MISS);
	92	}
	93
	94	static void kvmppc_core_queue_data_storage(struct kvm_vcpu *vcpu,
	95	ulong dear_flags, ulong esr_flags)
	96	{
	97	vcpu->arch.queued_dear = dear_flags;
	98	vcpu->arch.queued_esr = esr_flags;
	99	kvmppc_booke_queue_irqprio(vcpu, BOOKE_IRQPRIO_DATA_STORAGE);
	100	}
	101
	102	static void kvmppc_core_queue_inst_storage(struct kvm_vcpu *vcpu,
	103	ulong esr_flags)
	104	{
	105	vcpu->arch.queued_esr = esr_flags;
	106	kvmppc_booke_queue_irqprio(vcpu, BOOKE_IRQPRIO_INST_STORAGE);
	107	}
	108
	109	void kvmppc_core_queue_program(struct kvm_vcpu *vcpu, ulong esr_flags)
	110	{
	111	vcpu->arch.queued_esr = esr_flags;
d4cf3892	112	kvmppc_booke_queue_irqprio(vcpu, BOOKE_IRQPRIO_PROGRAM);
9dd921cf HB	113	}
	114
	115	void kvmppc_core_queue_dec(struct kvm_vcpu *vcpu)
	116	{
d4cf3892	117	kvmppc_booke_queue_irqprio(vcpu, BOOKE_IRQPRIO_DECREMENTER);
9dd921cf HB	118	}
	119
	120	int kvmppc_core_pending_dec(struct kvm_vcpu *vcpu)
	121	{
d4cf3892	122	return test_bit(BOOKE_IRQPRIO_DECREMENTER, &vcpu->arch.pending_exceptions);
9dd921cf HB	123	}
9dd921cf HB	124
7706664d AG	125	void kvmppc_core_dequeue_dec(struct kvm_vcpu *vcpu)
	126	{
	127	clear_bit(BOOKE_IRQPRIO_DECREMENTER, &vcpu->arch.pending_exceptions);
	128	}
	129
9dd921cf HB	130	void kvmppc_core_queue_external(struct kvm_vcpu *vcpu,
	131	struct kvm_interrupt *irq)
	132	{
d4cf3892	133	kvmppc_booke_queue_irqprio(vcpu, BOOKE_IRQPRIO_EXTERNAL);
9dd921cf HB	134	}
9dd921cf HB	135
d4cf3892 HB	136	/* Deliver the interrupt of the corresponding priority, if possible. */
	137	static int kvmppc_booke_irqprio_deliver(struct kvm_vcpu *vcpu,
	138	unsigned int priority)
bbf45ba5	139	{
d4cf3892 HB	140	int allowed = 0;
d4cf3892 HB	141	ulong msr_mask;
daf5e271	142	bool update_esr = false, update_dear = false;
d4cf3892 HB	143
d4cf3892 HB	144	switch (priority) {
d4cf3892	145	case BOOKE_IRQPRIO_DTLB_MISS:
d4cf3892	146	case BOOKE_IRQPRIO_DATA_STORAGE:
daf5e271 LY	147	update_dear = true;
daf5e271 LY	148	/* fall through */
d4cf3892	149	case BOOKE_IRQPRIO_INST_STORAGE:
daf5e271 LY	150	case BOOKE_IRQPRIO_PROGRAM:
	151	update_esr = true;
	152	/* fall through */
	153	case BOOKE_IRQPRIO_ITLB_MISS:
	154	case BOOKE_IRQPRIO_SYSCALL:
d4cf3892	155	case BOOKE_IRQPRIO_FP_UNAVAIL:
bb3a8a17 HB	156	case BOOKE_IRQPRIO_SPE_UNAVAIL:
	157	case BOOKE_IRQPRIO_SPE_FP_DATA:
	158	case BOOKE_IRQPRIO_SPE_FP_ROUND:
d4cf3892 HB	159	case BOOKE_IRQPRIO_AP_UNAVAIL:
	160	case BOOKE_IRQPRIO_ALIGNMENT:
	161	allowed = 1;
	162	msr_mask = MSR_CE\|MSR_ME\|MSR_DE;
bbf45ba5	163	break;
d4cf3892 HB	164	case BOOKE_IRQPRIO_CRITICAL:
	165	case BOOKE_IRQPRIO_WATCHDOG:
	166	allowed = vcpu->arch.msr & MSR_CE;
	167	msr_mask = MSR_ME;
bbf45ba5	168	break;
d4cf3892 HB	169	case BOOKE_IRQPRIO_MACHINE_CHECK:
	170	allowed = vcpu->arch.msr & MSR_ME;
	171	msr_mask = 0;
bbf45ba5	172	break;
d4cf3892 HB	173	case BOOKE_IRQPRIO_EXTERNAL:
	174	case BOOKE_IRQPRIO_DECREMENTER:
	175	case BOOKE_IRQPRIO_FIT:
	176	allowed = vcpu->arch.msr & MSR_EE;
	177	msr_mask = MSR_CE\|MSR_ME\|MSR_DE;
bbf45ba5	178	break;
d4cf3892 HB	179	case BOOKE_IRQPRIO_DEBUG:
	180	allowed = vcpu->arch.msr & MSR_DE;
	181	msr_mask = MSR_ME;
bbf45ba5	182	break;
bbf45ba5 HB	183	}
bbf45ba5 HB	184
d4cf3892 HB	185	if (allowed) {
	186	vcpu->arch.srr0 = vcpu->arch.pc;
	187	vcpu->arch.srr1 = vcpu->arch.msr;
	188	vcpu->arch.pc = vcpu->arch.ivpr \| vcpu->arch.ivor[priority];
daf5e271 LY	189	if (update_esr == true)
	190	vcpu->arch.esr = vcpu->arch.queued_esr;
	191	if (update_dear == true)
	192	vcpu->arch.dear = vcpu->arch.queued_dear;
d4cf3892	193	kvmppc_set_msr(vcpu, vcpu->arch.msr & msr_mask);
bbf45ba5	194
d4cf3892	195	clear_bit(priority, &vcpu->arch.pending_exceptions);
bbf45ba5 HB	196	}
bbf45ba5 HB	197
d4cf3892	198	return allowed;
bbf45ba5 HB	199	}
	200
	201	/* Check pending exceptions and deliver one, if possible. */
9dd921cf	202	void kvmppc_core_deliver_interrupts(struct kvm_vcpu *vcpu)
bbf45ba5 HB	203	{
bbf45ba5 HB	204	unsigned long *pending = &vcpu->arch.pending_exceptions;
bbf45ba5 HB	205	unsigned int priority;
bbf45ba5 HB	206
9ab80843	207	priority = __ffs(*pending);
bdc89f13	208	while (priority <= BOOKE_IRQPRIO_MAX) {
d4cf3892	209	if (kvmppc_booke_irqprio_deliver(vcpu, priority))
bbf45ba5	210	break;
bbf45ba5 HB	211
	212	priority = find_next_bit(pending,
	213	BITS_PER_BYTE * sizeof(*pending),
	214	priority + 1);
	215	}
	216	}
	217
bbf45ba5 HB	218	/**
	219	* kvmppc_handle_exit
	220	*
	221	* Return value is in the form (errcode<<2 \| RESUME_FLAG_HOST \| RESUME_FLAG_NV)
	222	*/
	223	int kvmppc_handle_exit(struct kvm_run run, struct kvm_vcpu vcpu,
	224	unsigned int exit_nr)
	225	{
	226	enum emulation_result er;
	227	int r = RESUME_HOST;
	228
73e75b41 HB	229	/* update before a new last_exit_type is rewritten */
	230	kvmppc_update_timing_stats(vcpu);
	231
bbf45ba5 HB	232	local_irq_enable();
	233
	234	run->exit_reason = KVM_EXIT_UNKNOWN;
	235	run->ready_for_interrupt_injection = 1;
	236
	237	switch (exit_nr) {
	238	case BOOKE_INTERRUPT_MACHINE_CHECK:
	239	printk("MACHINE CHECK: %lx\n", mfspr(SPRN_MCSR));
	240	kvmppc_dump_vcpu(vcpu);
	241	r = RESUME_HOST;
	242	break;
	243
	244	case BOOKE_INTERRUPT_EXTERNAL:
7b701591	245	kvmppc_account_exit(vcpu, EXT_INTR_EXITS);
1b6766c7 HB	246	if (need_resched())
	247	cond_resched();
	248	r = RESUME_GUEST;
	249	break;
	250
bbf45ba5 HB	251	case BOOKE_INTERRUPT_DECREMENTER:
	252	/* Since we switched IVPR back to the host's value, the host
	253	* handled this interrupt the moment we enabled interrupts.
	254	* Now we just offer it a chance to reschedule the guest. */
7b701591	255	kvmppc_account_exit(vcpu, DEC_EXITS);
bbf45ba5 HB	256	if (need_resched())
bbf45ba5 HB	257	cond_resched();
bbf45ba5 HB	258	r = RESUME_GUEST;
	259	break;
	260
	261	case BOOKE_INTERRUPT_PROGRAM:
	262	if (vcpu->arch.msr & MSR_PR) {
	263	/* Program traps generated by user-level software must be handled
	264	* by the guest kernel. */
daf5e271	265	kvmppc_core_queue_program(vcpu, vcpu->arch.fault_esr);
bbf45ba5	266	r = RESUME_GUEST;
7b701591	267	kvmppc_account_exit(vcpu, USR_PR_INST);
bbf45ba5 HB	268	break;
	269	}
	270
	271	er = kvmppc_emulate_instruction(run, vcpu);
	272	switch (er) {
	273	case EMULATE_DONE:
73e75b41	274	/* don't overwrite subtypes, just account kvm_stats */
7b701591	275	kvmppc_account_exit_stat(vcpu, EMULATED_INST_EXITS);
bbf45ba5 HB	276	/* Future optimization: only reload non-volatiles if
bbf45ba5 HB	277	* they were actually modified by emulation. */
bbf45ba5 HB	278	r = RESUME_GUEST_NV;
	279	break;
	280	case EMULATE_DO_DCR:
	281	run->exit_reason = KVM_EXIT_DCR;
	282	r = RESUME_HOST;
	283	break;
	284	case EMULATE_FAIL:
	285	/* XXX Deliver Program interrupt to guest. */
5cf8ca22	286	printk(KERN_CRIT "%s: emulation at %lx failed (%08x)\n",
bbf45ba5 HB	287	__func__, vcpu->arch.pc, vcpu->arch.last_inst);
	288	/* For debugging, encode the failing instruction and
	289	* report it to userspace. */
	290	run->hw.hardware_exit_reason = ~0ULL << 32;
	291	run->hw.hardware_exit_reason \|= vcpu->arch.last_inst;
	292	r = RESUME_HOST;
	293	break;
	294	default:
	295	BUG();
	296	}
	297	break;
	298
de368dce	299	case BOOKE_INTERRUPT_FP_UNAVAIL:
d4cf3892	300	kvmppc_booke_queue_irqprio(vcpu, BOOKE_IRQPRIO_FP_UNAVAIL);
7b701591	301	kvmppc_account_exit(vcpu, FP_UNAVAIL);
de368dce CE	302	r = RESUME_GUEST;
	303	break;
	304
bb3a8a17 HB	305	case BOOKE_INTERRUPT_SPE_UNAVAIL:
	306	kvmppc_booke_queue_irqprio(vcpu, BOOKE_IRQPRIO_SPE_UNAVAIL);
	307	r = RESUME_GUEST;
	308	break;
	309
	310	case BOOKE_INTERRUPT_SPE_FP_DATA:
	311	kvmppc_booke_queue_irqprio(vcpu, BOOKE_IRQPRIO_SPE_FP_DATA);
	312	r = RESUME_GUEST;
	313	break;
	314
	315	case BOOKE_INTERRUPT_SPE_FP_ROUND:
	316	kvmppc_booke_queue_irqprio(vcpu, BOOKE_IRQPRIO_SPE_FP_ROUND);
	317	r = RESUME_GUEST;
	318	break;
	319
bbf45ba5	320	case BOOKE_INTERRUPT_DATA_STORAGE:
daf5e271 LY	321	kvmppc_core_queue_data_storage(vcpu, vcpu->arch.fault_dear,
daf5e271 LY	322	vcpu->arch.fault_esr);
7b701591	323	kvmppc_account_exit(vcpu, DSI_EXITS);
bbf45ba5 HB	324	r = RESUME_GUEST;
	325	break;
	326
	327	case BOOKE_INTERRUPT_INST_STORAGE:
daf5e271	328	kvmppc_core_queue_inst_storage(vcpu, vcpu->arch.fault_esr);
7b701591	329	kvmppc_account_exit(vcpu, ISI_EXITS);
bbf45ba5 HB	330	r = RESUME_GUEST;
	331	break;
	332
	333	case BOOKE_INTERRUPT_SYSCALL:
d4cf3892	334	kvmppc_booke_queue_irqprio(vcpu, BOOKE_IRQPRIO_SYSCALL);
7b701591	335	kvmppc_account_exit(vcpu, SYSCALL_EXITS);
bbf45ba5 HB	336	r = RESUME_GUEST;
	337	break;
	338
	339	case BOOKE_INTERRUPT_DTLB_MISS: {
bbf45ba5	340	unsigned long eaddr = vcpu->arch.fault_dear;
7924bd41	341	int gtlb_index;
475e7cdd	342	gpa_t gpaddr;
bbf45ba5 HB	343	gfn_t gfn;
	344
	345	/* Check the guest TLB. */
fa86b8dd	346	gtlb_index = kvmppc_mmu_dtlb_index(vcpu, eaddr);
7924bd41	347	if (gtlb_index < 0) {
bbf45ba5	348	/* The guest didn't have a mapping for it. */
daf5e271 LY	349	kvmppc_core_queue_dtlb_miss(vcpu,
	350	vcpu->arch.fault_dear,
	351	vcpu->arch.fault_esr);
b52a638c	352	kvmppc_mmu_dtlb_miss(vcpu);
7b701591	353	kvmppc_account_exit(vcpu, DTLB_REAL_MISS_EXITS);
bbf45ba5 HB	354	r = RESUME_GUEST;
	355	break;
	356	}
	357
be8d1cae	358	gpaddr = kvmppc_mmu_xlate(vcpu, gtlb_index, eaddr);
475e7cdd	359	gfn = gpaddr >> PAGE_SHIFT;
bbf45ba5 HB	360
	361	if (kvm_is_visible_gfn(vcpu->kvm, gfn)) {
	362	/* The guest TLB had a mapping, but the shadow TLB
	363	* didn't, and it is RAM. This could be because:
	364	* a) the entry is mapping the host kernel, or
	365	* b) the guest used a large mapping which we're faking
	366	* Either way, we need to satisfy the fault without
	367	* invoking the guest. */
58a96214	368	kvmppc_mmu_map(vcpu, eaddr, gpaddr, gtlb_index);
7b701591	369	kvmppc_account_exit(vcpu, DTLB_VIRT_MISS_EXITS);
bbf45ba5 HB	370	r = RESUME_GUEST;
	371	} else {
	372	/* Guest has mapped and accessed a page which is not
	373	* actually RAM. */
475e7cdd	374	vcpu->arch.paddr_accessed = gpaddr;
bbf45ba5	375	r = kvmppc_emulate_mmio(run, vcpu);
7b701591	376	kvmppc_account_exit(vcpu, MMIO_EXITS);
bbf45ba5 HB	377	}
	378
	379	break;
	380	}
	381
	382	case BOOKE_INTERRUPT_ITLB_MISS: {
bbf45ba5	383	unsigned long eaddr = vcpu->arch.pc;
89168618	384	gpa_t gpaddr;
bbf45ba5	385	gfn_t gfn;
7924bd41	386	int gtlb_index;
bbf45ba5 HB	387
	388	r = RESUME_GUEST;
	389
	390	/* Check the guest TLB. */
fa86b8dd	391	gtlb_index = kvmppc_mmu_itlb_index(vcpu, eaddr);
7924bd41	392	if (gtlb_index < 0) {
bbf45ba5	393	/* The guest didn't have a mapping for it. */
d4cf3892	394	kvmppc_booke_queue_irqprio(vcpu, BOOKE_IRQPRIO_ITLB_MISS);
b52a638c	395	kvmppc_mmu_itlb_miss(vcpu);
7b701591	396	kvmppc_account_exit(vcpu, ITLB_REAL_MISS_EXITS);
bbf45ba5 HB	397	break;
	398	}
	399
7b701591	400	kvmppc_account_exit(vcpu, ITLB_VIRT_MISS_EXITS);
bbf45ba5	401
be8d1cae	402	gpaddr = kvmppc_mmu_xlate(vcpu, gtlb_index, eaddr);
89168618	403	gfn = gpaddr >> PAGE_SHIFT;
bbf45ba5 HB	404
	405	if (kvm_is_visible_gfn(vcpu->kvm, gfn)) {
	406	/* The guest TLB had a mapping, but the shadow TLB
	407	* didn't. This could be because:
	408	* a) the entry is mapping the host kernel, or
	409	* b) the guest used a large mapping which we're faking
	410	* Either way, we need to satisfy the fault without
	411	* invoking the guest. */
58a96214	412	kvmppc_mmu_map(vcpu, eaddr, gpaddr, gtlb_index);
bbf45ba5 HB	413	} else {
bbf45ba5 HB	414	/* Guest mapped and leaped at non-RAM! */
d4cf3892	415	kvmppc_booke_queue_irqprio(vcpu, BOOKE_IRQPRIO_MACHINE_CHECK);
bbf45ba5 HB	416	}
	417
	418	break;
	419	}
	420
6a0ab738 HB	421	case BOOKE_INTERRUPT_DEBUG: {
	422	u32 dbsr;
	423
	424	vcpu->arch.pc = mfspr(SPRN_CSRR0);
	425
	426	/* clear IAC events in DBSR register */
	427	dbsr = mfspr(SPRN_DBSR);
	428	dbsr &= DBSR_IAC1 \| DBSR_IAC2 \| DBSR_IAC3 \| DBSR_IAC4;
	429	mtspr(SPRN_DBSR, dbsr);
	430
	431	run->exit_reason = KVM_EXIT_DEBUG;
7b701591	432	kvmppc_account_exit(vcpu, DEBUG_EXITS);
6a0ab738 HB	433	r = RESUME_HOST;
	434	break;
	435	}
	436
bbf45ba5 HB	437	default:
	438	printk(KERN_EMERG "exit_nr %d\n", exit_nr);
	439	BUG();
	440	}
	441
	442	local_irq_disable();
	443
9dd921cf	444	kvmppc_core_deliver_interrupts(vcpu);
bbf45ba5	445
bbf45ba5 HB	446	if (!(r & RESUME_HOST)) {
	447	/* To avoid clobbering exit_reason, only check for signals if
	448	* we aren't already exiting to userspace for some other
	449	* reason. */
	450	if (signal_pending(current)) {
	451	run->exit_reason = KVM_EXIT_INTR;
	452	r = (-EINTR << 2) \| RESUME_HOST \| (r & RESUME_FLAG_NV);
7b701591	453	kvmppc_account_exit(vcpu, SIGNAL_EXITS);
bbf45ba5 HB	454	}
	455	}
	456
	457	return r;
	458	}
	459
	460	/* Initial guest state: 16MB mapping 0 -> 0, PC = 0, MSR = 0, R1 = 16MB */
	461	int kvm_arch_vcpu_setup(struct kvm_vcpu *vcpu)
	462	{
bbf45ba5 HB	463	vcpu->arch.pc = 0;
bbf45ba5 HB	464	vcpu->arch.msr = 0;
8e5b26b5	465	kvmppc_set_gpr(vcpu, 1, (16<<20) - 8); /* -8 for the callee-save LR slot */
bbf45ba5	466
49dd2c49 HB	467	vcpu->arch.shadow_pid = 1;
49dd2c49 HB	468
bbf45ba5 HB	469	/* Eye-catching number so we know if the guest takes an interrupt
	470	* before it's programmed its own IVPR. */
	471	vcpu->arch.ivpr = 0x55550000;
	472
73e75b41 HB	473	kvmppc_init_timing_stats(vcpu);
73e75b41 HB	474
5cbb5106	475	return kvmppc_core_vcpu_setup(vcpu);
bbf45ba5 HB	476	}
	477
	478	int kvm_arch_vcpu_ioctl_get_regs(struct kvm_vcpu vcpu, struct kvm_regs regs)
	479	{
	480	int i;
	481
	482	regs->pc = vcpu->arch.pc;
992b5b29	483	regs->cr = kvmppc_get_cr(vcpu);
bbf45ba5 HB	484	regs->ctr = vcpu->arch.ctr;
bbf45ba5 HB	485	regs->lr = vcpu->arch.lr;
992b5b29	486	regs->xer = kvmppc_get_xer(vcpu);
bbf45ba5 HB	487	regs->msr = vcpu->arch.msr;
	488	regs->srr0 = vcpu->arch.srr0;
	489	regs->srr1 = vcpu->arch.srr1;
	490	regs->pid = vcpu->arch.pid;
	491	regs->sprg0 = vcpu->arch.sprg0;
	492	regs->sprg1 = vcpu->arch.sprg1;
	493	regs->sprg2 = vcpu->arch.sprg2;
	494	regs->sprg3 = vcpu->arch.sprg3;
	495	regs->sprg5 = vcpu->arch.sprg4;
	496	regs->sprg6 = vcpu->arch.sprg5;
	497	regs->sprg7 = vcpu->arch.sprg6;
	498
	499	for (i = 0; i < ARRAY_SIZE(regs->gpr); i++)
8e5b26b5	500	regs->gpr[i] = kvmppc_get_gpr(vcpu, i);
bbf45ba5 HB	501
	502	return 0;
	503	}
	504
	505	int kvm_arch_vcpu_ioctl_set_regs(struct kvm_vcpu vcpu, struct kvm_regs regs)
	506	{
	507	int i;
	508
	509	vcpu->arch.pc = regs->pc;
992b5b29	510	kvmppc_set_cr(vcpu, regs->cr);
bbf45ba5 HB	511	vcpu->arch.ctr = regs->ctr;
bbf45ba5 HB	512	vcpu->arch.lr = regs->lr;
992b5b29	513	kvmppc_set_xer(vcpu, regs->xer);
b8fd68ac	514	kvmppc_set_msr(vcpu, regs->msr);
bbf45ba5 HB	515	vcpu->arch.srr0 = regs->srr0;
	516	vcpu->arch.srr1 = regs->srr1;
	517	vcpu->arch.sprg0 = regs->sprg0;
	518	vcpu->arch.sprg1 = regs->sprg1;
	519	vcpu->arch.sprg2 = regs->sprg2;
	520	vcpu->arch.sprg3 = regs->sprg3;
	521	vcpu->arch.sprg5 = regs->sprg4;
	522	vcpu->arch.sprg6 = regs->sprg5;
	523	vcpu->arch.sprg7 = regs->sprg6;
	524
8e5b26b5 AG	525	for (i = 0; i < ARRAY_SIZE(regs->gpr); i++)
8e5b26b5 AG	526	kvmppc_set_gpr(vcpu, i, regs->gpr[i]);
bbf45ba5 HB	527
	528	return 0;
	529	}
	530
	531	int kvm_arch_vcpu_ioctl_get_sregs(struct kvm_vcpu *vcpu,
	532	struct kvm_sregs *sregs)
	533	{
	534	return -ENOTSUPP;
	535	}
	536
	537	int kvm_arch_vcpu_ioctl_set_sregs(struct kvm_vcpu *vcpu,
	538	struct kvm_sregs *sregs)
	539	{
	540	return -ENOTSUPP;
	541	}
	542
	543	int kvm_arch_vcpu_ioctl_get_fpu(struct kvm_vcpu vcpu, struct kvm_fpu fpu)
	544	{
	545	return -ENOTSUPP;
	546	}
	547
	548	int kvm_arch_vcpu_ioctl_set_fpu(struct kvm_vcpu vcpu, struct kvm_fpu fpu)
	549	{
	550	return -ENOTSUPP;
	551	}
	552
bbf45ba5 HB	553	int kvm_arch_vcpu_ioctl_translate(struct kvm_vcpu *vcpu,
	554	struct kvm_translation *tr)
	555	{
5cbb5106	556	return kvmppc_core_vcpu_translate(vcpu, tr);
bbf45ba5	557	}
d9fbd03d	558
4e755758 AG	559	int kvm_vm_ioctl_get_dirty_log(struct kvm kvm, struct kvm_dirty_log log)
	560	{
	561	return -ENOTSUPP;
	562	}
	563
2986b8c7	564	int __init kvmppc_booke_init(void)
d9fbd03d HB	565	{
	566	unsigned long ivor[16];
	567	unsigned long max_ivor = 0;
	568	int i;
	569
	570	/* We install our own exception handlers by hijacking IVPR. IVPR must
	571	* be 16-bit aligned, so we need a 64KB allocation. */
	572	kvmppc_booke_handlers = __get_free_pages(GFP_KERNEL \| __GFP_ZERO,
	573	VCPU_SIZE_ORDER);
	574	if (!kvmppc_booke_handlers)
	575	return -ENOMEM;
	576
	577	/* XXX make sure our handlers are smaller than Linux's */
	578
	579	/* Copy our interrupt handlers to match host IVORs. That way we don't
	580	* have to swap the IVORs on every guest/host transition. */
	581	ivor[0] = mfspr(SPRN_IVOR0);
	582	ivor[1] = mfspr(SPRN_IVOR1);
	583	ivor[2] = mfspr(SPRN_IVOR2);
	584	ivor[3] = mfspr(SPRN_IVOR3);
	585	ivor[4] = mfspr(SPRN_IVOR4);
	586	ivor[5] = mfspr(SPRN_IVOR5);
	587	ivor[6] = mfspr(SPRN_IVOR6);
	588	ivor[7] = mfspr(SPRN_IVOR7);
	589	ivor[8] = mfspr(SPRN_IVOR8);
	590	ivor[9] = mfspr(SPRN_IVOR9);
	591	ivor[10] = mfspr(SPRN_IVOR10);
	592	ivor[11] = mfspr(SPRN_IVOR11);
	593	ivor[12] = mfspr(SPRN_IVOR12);
	594	ivor[13] = mfspr(SPRN_IVOR13);
	595	ivor[14] = mfspr(SPRN_IVOR14);
	596	ivor[15] = mfspr(SPRN_IVOR15);
	597
	598	for (i = 0; i < 16; i++) {
	599	if (ivor[i] > max_ivor)
	600	max_ivor = ivor[i];
	601
	602	memcpy((void *)kvmppc_booke_handlers + ivor[i],
	603	kvmppc_handlers_start + i * kvmppc_handler_len,
	604	kvmppc_handler_len);
	605	}
	606	flush_icache_range(kvmppc_booke_handlers,
	607	kvmppc_booke_handlers + max_ivor + kvmppc_handler_len);
	608
db93f574	609	return 0;
d9fbd03d HB	610	}
d9fbd03d HB	611
db93f574	612	void __exit kvmppc_booke_exit(void)
d9fbd03d HB	613	{
	614	free_pages(kvmppc_booke_handlers, VCPU_SIZE_ORDER);
	615	kvm_exit();
	616	}