[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/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);
}

void kvmppc_core_dequeue_external(struct kvm_vcpu *vcpu,
                                  struct kvm_interrupt *irq)
{
	clear_bit(BOOKE_IRQPRIO_EXTERNAL, &vcpu->arch.pending_exceptions);
}

/* 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 uninitialized_var(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)
{
	int r;

	r = kvmppc_core_vcpu_translate(vcpu, tr);
	return r;
}

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
4496f974 AG	136	void kvmppc_core_dequeue_external(struct kvm_vcpu *vcpu,
	137	struct kvm_interrupt *irq)
	138	{
	139	clear_bit(BOOKE_IRQPRIO_EXTERNAL, &vcpu->arch.pending_exceptions);
	140	}
	141
d4cf3892 HB	142	/* Deliver the interrupt of the corresponding priority, if possible. */
	143	static int kvmppc_booke_irqprio_deliver(struct kvm_vcpu *vcpu,
	144	unsigned int priority)
bbf45ba5	145	{
d4cf3892	146	int allowed = 0;
6045be5d	147	ulong uninitialized_var(msr_mask);
daf5e271	148	bool update_esr = false, update_dear = false;
d4cf3892 HB	149
d4cf3892 HB	150	switch (priority) {
d4cf3892	151	case BOOKE_IRQPRIO_DTLB_MISS:
d4cf3892	152	case BOOKE_IRQPRIO_DATA_STORAGE:
daf5e271 LY	153	update_dear = true;
daf5e271 LY	154	/* fall through */
d4cf3892	155	case BOOKE_IRQPRIO_INST_STORAGE:
daf5e271 LY	156	case BOOKE_IRQPRIO_PROGRAM:
	157	update_esr = true;
	158	/* fall through */
	159	case BOOKE_IRQPRIO_ITLB_MISS:
	160	case BOOKE_IRQPRIO_SYSCALL:
d4cf3892	161	case BOOKE_IRQPRIO_FP_UNAVAIL:
bb3a8a17 HB	162	case BOOKE_IRQPRIO_SPE_UNAVAIL:
	163	case BOOKE_IRQPRIO_SPE_FP_DATA:
	164	case BOOKE_IRQPRIO_SPE_FP_ROUND:
d4cf3892 HB	165	case BOOKE_IRQPRIO_AP_UNAVAIL:
	166	case BOOKE_IRQPRIO_ALIGNMENT:
	167	allowed = 1;
	168	msr_mask = MSR_CE\|MSR_ME\|MSR_DE;
bbf45ba5	169	break;
d4cf3892 HB	170	case BOOKE_IRQPRIO_CRITICAL:
	171	case BOOKE_IRQPRIO_WATCHDOG:
	172	allowed = vcpu->arch.msr & MSR_CE;
	173	msr_mask = MSR_ME;
bbf45ba5	174	break;
d4cf3892 HB	175	case BOOKE_IRQPRIO_MACHINE_CHECK:
	176	allowed = vcpu->arch.msr & MSR_ME;
	177	msr_mask = 0;
bbf45ba5	178	break;
d4cf3892 HB	179	case BOOKE_IRQPRIO_EXTERNAL:
	180	case BOOKE_IRQPRIO_DECREMENTER:
	181	case BOOKE_IRQPRIO_FIT:
	182	allowed = vcpu->arch.msr & MSR_EE;
	183	msr_mask = MSR_CE\|MSR_ME\|MSR_DE;
bbf45ba5	184	break;
d4cf3892 HB	185	case BOOKE_IRQPRIO_DEBUG:
	186	allowed = vcpu->arch.msr & MSR_DE;
	187	msr_mask = MSR_ME;
bbf45ba5	188	break;
bbf45ba5 HB	189	}
bbf45ba5 HB	190
d4cf3892 HB	191	if (allowed) {
	192	vcpu->arch.srr0 = vcpu->arch.pc;
	193	vcpu->arch.srr1 = vcpu->arch.msr;
	194	vcpu->arch.pc = vcpu->arch.ivpr \| vcpu->arch.ivor[priority];
daf5e271 LY	195	if (update_esr == true)
	196	vcpu->arch.esr = vcpu->arch.queued_esr;
	197	if (update_dear == true)
	198	vcpu->arch.dear = vcpu->arch.queued_dear;
d4cf3892	199	kvmppc_set_msr(vcpu, vcpu->arch.msr & msr_mask);
bbf45ba5	200
d4cf3892	201	clear_bit(priority, &vcpu->arch.pending_exceptions);
bbf45ba5 HB	202	}
bbf45ba5 HB	203
d4cf3892	204	return allowed;
bbf45ba5 HB	205	}
	206
	207	/* Check pending exceptions and deliver one, if possible. */
9dd921cf	208	void kvmppc_core_deliver_interrupts(struct kvm_vcpu *vcpu)
bbf45ba5 HB	209	{
bbf45ba5 HB	210	unsigned long *pending = &vcpu->arch.pending_exceptions;
bbf45ba5 HB	211	unsigned int priority;
bbf45ba5 HB	212
9ab80843	213	priority = __ffs(*pending);
bdc89f13	214	while (priority <= BOOKE_IRQPRIO_MAX) {
d4cf3892	215	if (kvmppc_booke_irqprio_deliver(vcpu, priority))
bbf45ba5	216	break;
bbf45ba5 HB	217
	218	priority = find_next_bit(pending,
	219	BITS_PER_BYTE * sizeof(*pending),
	220	priority + 1);
	221	}
	222	}
	223
bbf45ba5 HB	224	/**
	225	* kvmppc_handle_exit
	226	*
	227	* Return value is in the form (errcode<<2 \| RESUME_FLAG_HOST \| RESUME_FLAG_NV)
	228	*/
	229	int kvmppc_handle_exit(struct kvm_run run, struct kvm_vcpu vcpu,
	230	unsigned int exit_nr)
	231	{
	232	enum emulation_result er;
	233	int r = RESUME_HOST;
	234
73e75b41 HB	235	/* update before a new last_exit_type is rewritten */
	236	kvmppc_update_timing_stats(vcpu);
	237
bbf45ba5 HB	238	local_irq_enable();
	239
	240	run->exit_reason = KVM_EXIT_UNKNOWN;
	241	run->ready_for_interrupt_injection = 1;
	242
	243	switch (exit_nr) {
	244	case BOOKE_INTERRUPT_MACHINE_CHECK:
	245	printk("MACHINE CHECK: %lx\n", mfspr(SPRN_MCSR));
	246	kvmppc_dump_vcpu(vcpu);
	247	r = RESUME_HOST;
	248	break;
	249
	250	case BOOKE_INTERRUPT_EXTERNAL:
7b701591	251	kvmppc_account_exit(vcpu, EXT_INTR_EXITS);
1b6766c7 HB	252	if (need_resched())
	253	cond_resched();
	254	r = RESUME_GUEST;
	255	break;
	256
bbf45ba5 HB	257	case BOOKE_INTERRUPT_DECREMENTER:
	258	/* Since we switched IVPR back to the host's value, the host
	259	* handled this interrupt the moment we enabled interrupts.
	260	* Now we just offer it a chance to reschedule the guest. */
7b701591	261	kvmppc_account_exit(vcpu, DEC_EXITS);
bbf45ba5 HB	262	if (need_resched())
bbf45ba5 HB	263	cond_resched();
bbf45ba5 HB	264	r = RESUME_GUEST;
	265	break;
	266
	267	case BOOKE_INTERRUPT_PROGRAM:
	268	if (vcpu->arch.msr & MSR_PR) {
	269	/* Program traps generated by user-level software must be handled
	270	* by the guest kernel. */
daf5e271	271	kvmppc_core_queue_program(vcpu, vcpu->arch.fault_esr);
bbf45ba5	272	r = RESUME_GUEST;
7b701591	273	kvmppc_account_exit(vcpu, USR_PR_INST);
bbf45ba5 HB	274	break;
	275	}
	276
	277	er = kvmppc_emulate_instruction(run, vcpu);
	278	switch (er) {
	279	case EMULATE_DONE:
73e75b41	280	/* don't overwrite subtypes, just account kvm_stats */
7b701591	281	kvmppc_account_exit_stat(vcpu, EMULATED_INST_EXITS);
bbf45ba5 HB	282	/* Future optimization: only reload non-volatiles if
bbf45ba5 HB	283	* they were actually modified by emulation. */
bbf45ba5 HB	284	r = RESUME_GUEST_NV;
	285	break;
	286	case EMULATE_DO_DCR:
	287	run->exit_reason = KVM_EXIT_DCR;
	288	r = RESUME_HOST;
	289	break;
	290	case EMULATE_FAIL:
	291	/* XXX Deliver Program interrupt to guest. */
5cf8ca22	292	printk(KERN_CRIT "%s: emulation at %lx failed (%08x)\n",
bbf45ba5 HB	293	__func__, vcpu->arch.pc, vcpu->arch.last_inst);
	294	/* For debugging, encode the failing instruction and
	295	* report it to userspace. */
	296	run->hw.hardware_exit_reason = ~0ULL << 32;
	297	run->hw.hardware_exit_reason \|= vcpu->arch.last_inst;
	298	r = RESUME_HOST;
	299	break;
	300	default:
	301	BUG();
	302	}
	303	break;
	304
de368dce	305	case BOOKE_INTERRUPT_FP_UNAVAIL:
d4cf3892	306	kvmppc_booke_queue_irqprio(vcpu, BOOKE_IRQPRIO_FP_UNAVAIL);
7b701591	307	kvmppc_account_exit(vcpu, FP_UNAVAIL);
de368dce CE	308	r = RESUME_GUEST;
	309	break;
	310
bb3a8a17 HB	311	case BOOKE_INTERRUPT_SPE_UNAVAIL:
	312	kvmppc_booke_queue_irqprio(vcpu, BOOKE_IRQPRIO_SPE_UNAVAIL);
	313	r = RESUME_GUEST;
	314	break;
	315
	316	case BOOKE_INTERRUPT_SPE_FP_DATA:
	317	kvmppc_booke_queue_irqprio(vcpu, BOOKE_IRQPRIO_SPE_FP_DATA);
	318	r = RESUME_GUEST;
	319	break;
	320
	321	case BOOKE_INTERRUPT_SPE_FP_ROUND:
	322	kvmppc_booke_queue_irqprio(vcpu, BOOKE_IRQPRIO_SPE_FP_ROUND);
	323	r = RESUME_GUEST;
	324	break;
	325
bbf45ba5	326	case BOOKE_INTERRUPT_DATA_STORAGE:
daf5e271 LY	327	kvmppc_core_queue_data_storage(vcpu, vcpu->arch.fault_dear,
daf5e271 LY	328	vcpu->arch.fault_esr);
7b701591	329	kvmppc_account_exit(vcpu, DSI_EXITS);
bbf45ba5 HB	330	r = RESUME_GUEST;
	331	break;
	332
	333	case BOOKE_INTERRUPT_INST_STORAGE:
daf5e271	334	kvmppc_core_queue_inst_storage(vcpu, vcpu->arch.fault_esr);
7b701591	335	kvmppc_account_exit(vcpu, ISI_EXITS);
bbf45ba5 HB	336	r = RESUME_GUEST;
	337	break;
	338
	339	case BOOKE_INTERRUPT_SYSCALL:
d4cf3892	340	kvmppc_booke_queue_irqprio(vcpu, BOOKE_IRQPRIO_SYSCALL);
7b701591	341	kvmppc_account_exit(vcpu, SYSCALL_EXITS);
bbf45ba5 HB	342	r = RESUME_GUEST;
	343	break;
	344
	345	case BOOKE_INTERRUPT_DTLB_MISS: {
bbf45ba5	346	unsigned long eaddr = vcpu->arch.fault_dear;
7924bd41	347	int gtlb_index;
475e7cdd	348	gpa_t gpaddr;
bbf45ba5 HB	349	gfn_t gfn;
	350
	351	/* Check the guest TLB. */
fa86b8dd	352	gtlb_index = kvmppc_mmu_dtlb_index(vcpu, eaddr);
7924bd41	353	if (gtlb_index < 0) {
bbf45ba5	354	/* The guest didn't have a mapping for it. */
daf5e271 LY	355	kvmppc_core_queue_dtlb_miss(vcpu,
	356	vcpu->arch.fault_dear,
	357	vcpu->arch.fault_esr);
b52a638c	358	kvmppc_mmu_dtlb_miss(vcpu);
7b701591	359	kvmppc_account_exit(vcpu, DTLB_REAL_MISS_EXITS);
bbf45ba5 HB	360	r = RESUME_GUEST;
	361	break;
	362	}
	363
be8d1cae	364	gpaddr = kvmppc_mmu_xlate(vcpu, gtlb_index, eaddr);
475e7cdd	365	gfn = gpaddr >> PAGE_SHIFT;
bbf45ba5 HB	366
	367	if (kvm_is_visible_gfn(vcpu->kvm, gfn)) {
	368	/* The guest TLB had a mapping, but the shadow TLB
	369	* didn't, and it is RAM. This could be because:
	370	* a) the entry is mapping the host kernel, or
	371	* b) the guest used a large mapping which we're faking
	372	* Either way, we need to satisfy the fault without
	373	* invoking the guest. */
58a96214	374	kvmppc_mmu_map(vcpu, eaddr, gpaddr, gtlb_index);
7b701591	375	kvmppc_account_exit(vcpu, DTLB_VIRT_MISS_EXITS);
bbf45ba5 HB	376	r = RESUME_GUEST;
	377	} else {
	378	/* Guest has mapped and accessed a page which is not
	379	* actually RAM. */
475e7cdd	380	vcpu->arch.paddr_accessed = gpaddr;
bbf45ba5	381	r = kvmppc_emulate_mmio(run, vcpu);
7b701591	382	kvmppc_account_exit(vcpu, MMIO_EXITS);
bbf45ba5 HB	383	}
	384
	385	break;
	386	}
	387
	388	case BOOKE_INTERRUPT_ITLB_MISS: {
bbf45ba5	389	unsigned long eaddr = vcpu->arch.pc;
89168618	390	gpa_t gpaddr;
bbf45ba5	391	gfn_t gfn;
7924bd41	392	int gtlb_index;
bbf45ba5 HB	393
	394	r = RESUME_GUEST;
	395
	396	/* Check the guest TLB. */
fa86b8dd	397	gtlb_index = kvmppc_mmu_itlb_index(vcpu, eaddr);
7924bd41	398	if (gtlb_index < 0) {
bbf45ba5	399	/* The guest didn't have a mapping for it. */
d4cf3892	400	kvmppc_booke_queue_irqprio(vcpu, BOOKE_IRQPRIO_ITLB_MISS);
b52a638c	401	kvmppc_mmu_itlb_miss(vcpu);
7b701591	402	kvmppc_account_exit(vcpu, ITLB_REAL_MISS_EXITS);
bbf45ba5 HB	403	break;
	404	}
	405
7b701591	406	kvmppc_account_exit(vcpu, ITLB_VIRT_MISS_EXITS);
bbf45ba5	407
be8d1cae	408	gpaddr = kvmppc_mmu_xlate(vcpu, gtlb_index, eaddr);
89168618	409	gfn = gpaddr >> PAGE_SHIFT;
bbf45ba5 HB	410
	411	if (kvm_is_visible_gfn(vcpu->kvm, gfn)) {
	412	/* The guest TLB had a mapping, but the shadow TLB
	413	* didn't. This could be because:
	414	* a) the entry is mapping the host kernel, or
	415	* b) the guest used a large mapping which we're faking
	416	* Either way, we need to satisfy the fault without
	417	* invoking the guest. */
58a96214	418	kvmppc_mmu_map(vcpu, eaddr, gpaddr, gtlb_index);
bbf45ba5 HB	419	} else {
bbf45ba5 HB	420	/* Guest mapped and leaped at non-RAM! */
d4cf3892	421	kvmppc_booke_queue_irqprio(vcpu, BOOKE_IRQPRIO_MACHINE_CHECK);
bbf45ba5 HB	422	}
	423
	424	break;
	425	}
	426
6a0ab738 HB	427	case BOOKE_INTERRUPT_DEBUG: {
	428	u32 dbsr;
	429
	430	vcpu->arch.pc = mfspr(SPRN_CSRR0);
	431
	432	/* clear IAC events in DBSR register */
	433	dbsr = mfspr(SPRN_DBSR);
	434	dbsr &= DBSR_IAC1 \| DBSR_IAC2 \| DBSR_IAC3 \| DBSR_IAC4;
	435	mtspr(SPRN_DBSR, dbsr);
	436
	437	run->exit_reason = KVM_EXIT_DEBUG;
7b701591	438	kvmppc_account_exit(vcpu, DEBUG_EXITS);
6a0ab738 HB	439	r = RESUME_HOST;
	440	break;
	441	}
	442
bbf45ba5 HB	443	default:
	444	printk(KERN_EMERG "exit_nr %d\n", exit_nr);
	445	BUG();
	446	}
	447
	448	local_irq_disable();
	449
9dd921cf	450	kvmppc_core_deliver_interrupts(vcpu);
bbf45ba5	451
bbf45ba5 HB	452	if (!(r & RESUME_HOST)) {
	453	/* To avoid clobbering exit_reason, only check for signals if
	454	* we aren't already exiting to userspace for some other
	455	* reason. */
	456	if (signal_pending(current)) {
	457	run->exit_reason = KVM_EXIT_INTR;
	458	r = (-EINTR << 2) \| RESUME_HOST \| (r & RESUME_FLAG_NV);
7b701591	459	kvmppc_account_exit(vcpu, SIGNAL_EXITS);
bbf45ba5 HB	460	}
	461	}
	462
	463	return r;
	464	}
	465
	466	/* Initial guest state: 16MB mapping 0 -> 0, PC = 0, MSR = 0, R1 = 16MB */
	467	int kvm_arch_vcpu_setup(struct kvm_vcpu *vcpu)
	468	{
bbf45ba5 HB	469	vcpu->arch.pc = 0;
bbf45ba5 HB	470	vcpu->arch.msr = 0;
8e5b26b5	471	kvmppc_set_gpr(vcpu, 1, (16<<20) - 8); /* -8 for the callee-save LR slot */
bbf45ba5	472
49dd2c49 HB	473	vcpu->arch.shadow_pid = 1;
49dd2c49 HB	474
bbf45ba5 HB	475	/* Eye-catching number so we know if the guest takes an interrupt
	476	* before it's programmed its own IVPR. */
	477	vcpu->arch.ivpr = 0x55550000;
	478
73e75b41 HB	479	kvmppc_init_timing_stats(vcpu);
73e75b41 HB	480
5cbb5106	481	return kvmppc_core_vcpu_setup(vcpu);
bbf45ba5 HB	482	}
	483
	484	int kvm_arch_vcpu_ioctl_get_regs(struct kvm_vcpu vcpu, struct kvm_regs regs)
	485	{
	486	int i;
	487
	488	regs->pc = vcpu->arch.pc;
992b5b29	489	regs->cr = kvmppc_get_cr(vcpu);
bbf45ba5 HB	490	regs->ctr = vcpu->arch.ctr;
bbf45ba5 HB	491	regs->lr = vcpu->arch.lr;
992b5b29	492	regs->xer = kvmppc_get_xer(vcpu);
bbf45ba5 HB	493	regs->msr = vcpu->arch.msr;
	494	regs->srr0 = vcpu->arch.srr0;
	495	regs->srr1 = vcpu->arch.srr1;
	496	regs->pid = vcpu->arch.pid;
	497	regs->sprg0 = vcpu->arch.sprg0;
	498	regs->sprg1 = vcpu->arch.sprg1;
	499	regs->sprg2 = vcpu->arch.sprg2;
	500	regs->sprg3 = vcpu->arch.sprg3;
	501	regs->sprg5 = vcpu->arch.sprg4;
	502	regs->sprg6 = vcpu->arch.sprg5;
	503	regs->sprg7 = vcpu->arch.sprg6;
	504
	505	for (i = 0; i < ARRAY_SIZE(regs->gpr); i++)
8e5b26b5	506	regs->gpr[i] = kvmppc_get_gpr(vcpu, i);
bbf45ba5 HB	507
	508	return 0;
	509	}
	510
	511	int kvm_arch_vcpu_ioctl_set_regs(struct kvm_vcpu vcpu, struct kvm_regs regs)
	512	{
	513	int i;
	514
	515	vcpu->arch.pc = regs->pc;
992b5b29	516	kvmppc_set_cr(vcpu, regs->cr);
bbf45ba5 HB	517	vcpu->arch.ctr = regs->ctr;
bbf45ba5 HB	518	vcpu->arch.lr = regs->lr;
992b5b29	519	kvmppc_set_xer(vcpu, regs->xer);
b8fd68ac	520	kvmppc_set_msr(vcpu, regs->msr);
bbf45ba5 HB	521	vcpu->arch.srr0 = regs->srr0;
	522	vcpu->arch.srr1 = regs->srr1;
	523	vcpu->arch.sprg0 = regs->sprg0;
	524	vcpu->arch.sprg1 = regs->sprg1;
	525	vcpu->arch.sprg2 = regs->sprg2;
	526	vcpu->arch.sprg3 = regs->sprg3;
	527	vcpu->arch.sprg5 = regs->sprg4;
	528	vcpu->arch.sprg6 = regs->sprg5;
	529	vcpu->arch.sprg7 = regs->sprg6;
	530
8e5b26b5 AG	531	for (i = 0; i < ARRAY_SIZE(regs->gpr); i++)
8e5b26b5 AG	532	kvmppc_set_gpr(vcpu, i, regs->gpr[i]);
bbf45ba5 HB	533
	534	return 0;
	535	}
	536
	537	int kvm_arch_vcpu_ioctl_get_sregs(struct kvm_vcpu *vcpu,
	538	struct kvm_sregs *sregs)
	539	{
	540	return -ENOTSUPP;
	541	}
	542
	543	int kvm_arch_vcpu_ioctl_set_sregs(struct kvm_vcpu *vcpu,
	544	struct kvm_sregs *sregs)
	545	{
	546	return -ENOTSUPP;
	547	}
	548
	549	int kvm_arch_vcpu_ioctl_get_fpu(struct kvm_vcpu vcpu, struct kvm_fpu fpu)
	550	{
	551	return -ENOTSUPP;
	552	}
	553
	554	int kvm_arch_vcpu_ioctl_set_fpu(struct kvm_vcpu vcpu, struct kvm_fpu fpu)
	555	{
	556	return -ENOTSUPP;
	557	}
	558
bbf45ba5 HB	559	int kvm_arch_vcpu_ioctl_translate(struct kvm_vcpu *vcpu,
	560	struct kvm_translation *tr)
	561	{
98001d8d AK	562	int r;
98001d8d AK	563
98001d8d	564	r = kvmppc_core_vcpu_translate(vcpu, tr);
98001d8d	565	return r;
bbf45ba5	566	}
d9fbd03d	567
4e755758 AG	568	int kvm_vm_ioctl_get_dirty_log(struct kvm kvm, struct kvm_dirty_log log)
	569	{
	570	return -ENOTSUPP;
	571	}
	572
2986b8c7	573	int __init kvmppc_booke_init(void)
d9fbd03d HB	574	{
	575	unsigned long ivor[16];
	576	unsigned long max_ivor = 0;
	577	int i;
	578
	579	/* We install our own exception handlers by hijacking IVPR. IVPR must
	580	* be 16-bit aligned, so we need a 64KB allocation. */
	581	kvmppc_booke_handlers = __get_free_pages(GFP_KERNEL \| __GFP_ZERO,
	582	VCPU_SIZE_ORDER);
	583	if (!kvmppc_booke_handlers)
	584	return -ENOMEM;
	585
	586	/* XXX make sure our handlers are smaller than Linux's */
	587
	588	/* Copy our interrupt handlers to match host IVORs. That way we don't
	589	* have to swap the IVORs on every guest/host transition. */
	590	ivor[0] = mfspr(SPRN_IVOR0);
	591	ivor[1] = mfspr(SPRN_IVOR1);
	592	ivor[2] = mfspr(SPRN_IVOR2);
	593	ivor[3] = mfspr(SPRN_IVOR3);
	594	ivor[4] = mfspr(SPRN_IVOR4);
	595	ivor[5] = mfspr(SPRN_IVOR5);
	596	ivor[6] = mfspr(SPRN_IVOR6);
	597	ivor[7] = mfspr(SPRN_IVOR7);
	598	ivor[8] = mfspr(SPRN_IVOR8);
	599	ivor[9] = mfspr(SPRN_IVOR9);
	600	ivor[10] = mfspr(SPRN_IVOR10);
	601	ivor[11] = mfspr(SPRN_IVOR11);
	602	ivor[12] = mfspr(SPRN_IVOR12);
	603	ivor[13] = mfspr(SPRN_IVOR13);
	604	ivor[14] = mfspr(SPRN_IVOR14);
	605	ivor[15] = mfspr(SPRN_IVOR15);
	606
	607	for (i = 0; i < 16; i++) {
	608	if (ivor[i] > max_ivor)
	609	max_ivor = ivor[i];
	610
	611	memcpy((void *)kvmppc_booke_handlers + ivor[i],
	612	kvmppc_handlers_start + i * kvmppc_handler_len,
	613	kvmppc_handler_len);
	614	}
	615	flush_icache_range(kvmppc_booke_handlers,
	616	kvmppc_booke_handlers + max_ivor + kvmppc_handler_len);
	617
db93f574	618	return 0;
d9fbd03d HB	619	}
d9fbd03d HB	620
db93f574	621	void __exit kvmppc_booke_exit(void)
d9fbd03d HB	622	{
	623	free_pages(kvmppc_booke_handlers, VCPU_SIZE_ORDER);
	624	kvm_exit();
	625	}