arch/powerpc/kvm/44x_emulate.c - linux/kernel/git/davem/net-next - Git at Google

 /*
  * 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. 2008
  *
  * Authors: Hollis Blanchard <hollisb@us.ibm.com>
  */

 #include <asm/kvm_ppc.h>
 #include <asm/dcr.h>
 #include <asm/dcr-regs.h>
 #include <asm/disassemble.h>
 #include <asm/kvm_44x.h>
 #include "timing.h"

 #include "booke.h"
 #include "44x_tlb.h"

 #define OP_RFI      19

 #define XOP_RFI     50
 #define XOP_MFMSR   83
 #define XOP_WRTEE   131
 #define XOP_MTMSR   146
 #define XOP_WRTEEI  163
 #define XOP_MFDCR   323
 #define XOP_MTDCR   451
 #define XOP_TLBSX   914
 #define XOP_ICCCI   966
 #define XOP_TLBWE   978

 static void kvmppc_emul_rfi(struct kvm_vcpu *vcpu)
 {
 	vcpu->arch.pc = vcpu->arch.srr0;
 	kvmppc_set_msr(vcpu, vcpu->arch.srr1);
 }

 int kvmppc_core_emulate_op(struct kvm_run *run, struct kvm_vcpu *vcpu,
                            unsigned int inst, int *advance)
 {
 	int emulated = EMULATE_DONE;
 	int dcrn;
 	int ra;
 	int rb;
 	int rc;
 	int rs;
 	int rt;
 	int ws;

 	switch (get_op(inst)) {
 	case OP_RFI:
 		switch (get_xop(inst)) {
 		case XOP_RFI:
 			kvmppc_emul_rfi(vcpu);
 			kvmppc_set_exit_type(vcpu, EMULATED_RFI_EXITS);
 			*advance = 0;
 			break;

 		default:
 			emulated = EMULATE_FAIL;
 			break;
 		}
 		break;

 	case 31:
 		switch (get_xop(inst)) {

 		case XOP_MFMSR:
 			rt = get_rt(inst);
 			vcpu->arch.gpr[rt] = vcpu->arch.msr;
 			kvmppc_set_exit_type(vcpu, EMULATED_MFMSR_EXITS);
 			break;

 		case XOP_MTMSR:
 			rs = get_rs(inst);
 			kvmppc_set_exit_type(vcpu, EMULATED_MTMSR_EXITS);
 			kvmppc_set_msr(vcpu, vcpu->arch.gpr[rs]);
 			break;

 		case XOP_WRTEE:
 			rs = get_rs(inst);
 			vcpu->arch.msr = (vcpu->arch.msr & ~MSR_EE)
 							 | (vcpu->arch.gpr[rs] & MSR_EE);
 			kvmppc_set_exit_type(vcpu, EMULATED_WRTEE_EXITS);
 			break;

 		case XOP_WRTEEI:
 			vcpu->arch.msr = (vcpu->arch.msr & ~MSR_EE)
 							 | (inst & MSR_EE);
 			kvmppc_set_exit_type(vcpu, EMULATED_WRTEE_EXITS);
 			break;

 		case XOP_MFDCR:
 			dcrn = get_dcrn(inst);
 			rt = get_rt(inst);

 			/* The guest may access CPR0 registers to determine the timebase
 			 * frequency, and it must know the real host frequency because it
 			 * can directly access the timebase registers.
 			 *
 			 * It would be possible to emulate those accesses in userspace,
 			 * but userspace can really only figure out the end frequency.
 			 * We could decompose that into the factors that compute it, but
 			 * that's tricky math, and it's easier to just report the real
 			 * CPR0 values.
 			 */
 			switch (dcrn) {
 			case DCRN_CPR0_CONFIG_ADDR:
 				vcpu->arch.gpr[rt] = vcpu->arch.cpr0_cfgaddr;
 				break;
 			case DCRN_CPR0_CONFIG_DATA:
 				local_irq_disable();
 				mtdcr(DCRN_CPR0_CONFIG_ADDR,
 					  vcpu->arch.cpr0_cfgaddr);
 				vcpu->arch.gpr[rt] = mfdcr(DCRN_CPR0_CONFIG_DATA);
 				local_irq_enable();
 				break;
 			default:
 				run->dcr.dcrn = dcrn;
 				run->dcr.data =  0;
 				run->dcr.is_write = 0;
 				vcpu->arch.io_gpr = rt;
 				vcpu->arch.dcr_needed = 1;
 				kvmppc_account_exit(vcpu, DCR_EXITS);
 				emulated = EMULATE_DO_DCR;
 			}

 			break;

 		case XOP_MTDCR:
 			dcrn = get_dcrn(inst);
 			rs = get_rs(inst);

 			/* emulate some access in kernel */
 			switch (dcrn) {
 			case DCRN_CPR0_CONFIG_ADDR:
 				vcpu->arch.cpr0_cfgaddr = vcpu->arch.gpr[rs];
 				break;
 			default:
 				run->dcr.dcrn = dcrn;
 				run->dcr.data = vcpu->arch.gpr[rs];
 				run->dcr.is_write = 1;
 				vcpu->arch.dcr_needed = 1;
 				kvmppc_account_exit(vcpu, DCR_EXITS);
 				emulated = EMULATE_DO_DCR;
 			}

 			break;

 		case XOP_TLBWE:
 			ra = get_ra(inst);
 			rs = get_rs(inst);
 			ws = get_ws(inst);
 			emulated = kvmppc_44x_emul_tlbwe(vcpu, ra, rs, ws);
 			break;

 		case XOP_TLBSX:
 			rt = get_rt(inst);
 			ra = get_ra(inst);
 			rb = get_rb(inst);
 			rc = get_rc(inst);
 			emulated = kvmppc_44x_emul_tlbsx(vcpu, rt, ra, rb, rc);
 			break;

 		case XOP_ICCCI:
 			break;

 		default:
 			emulated = EMULATE_FAIL;
 		}

 		break;

 	default:
 		emulated = EMULATE_FAIL;
 	}

 	return emulated;
 }

 int kvmppc_core_emulate_mtspr(struct kvm_vcpu *vcpu, int sprn, int rs)
 {
 	switch (sprn) {
 	case SPRN_MMUCR:
 		vcpu->arch.mmucr = vcpu->arch.gpr[rs]; break;
 	case SPRN_PID:
 		kvmppc_set_pid(vcpu, vcpu->arch.gpr[rs]); break;
 	case SPRN_CCR0:
 		vcpu->arch.ccr0 = vcpu->arch.gpr[rs]; break;
 	case SPRN_CCR1:
 		vcpu->arch.ccr1 = vcpu->arch.gpr[rs]; break;
 	case SPRN_DEAR:
 		vcpu->arch.dear = vcpu->arch.gpr[rs]; break;
 	case SPRN_ESR:
 		vcpu->arch.esr = vcpu->arch.gpr[rs]; break;
 	case SPRN_DBCR0:
 		vcpu->arch.dbcr0 = vcpu->arch.gpr[rs]; break;
 	case SPRN_DBCR1:
 		vcpu->arch.dbcr1 = vcpu->arch.gpr[rs]; break;
 	case SPRN_TSR:
 		vcpu->arch.tsr &= ~vcpu->arch.gpr[rs]; break;
 	case SPRN_TCR:
 		vcpu->arch.tcr = vcpu->arch.gpr[rs];
 		kvmppc_emulate_dec(vcpu);
 		break;

 	/* Note: SPRG4-7 are user-readable. These values are
 	 * loaded into the real SPRGs when resuming the
 	 * guest. */
 	case SPRN_SPRG4:
 		vcpu->arch.sprg4 = vcpu->arch.gpr[rs]; break;
 	case SPRN_SPRG5:
 		vcpu->arch.sprg5 = vcpu->arch.gpr[rs]; break;
 	case SPRN_SPRG6:
 		vcpu->arch.sprg6 = vcpu->arch.gpr[rs]; break;
 	case SPRN_SPRG7:
 		vcpu->arch.sprg7 = vcpu->arch.gpr[rs]; break;

 	case SPRN_IVPR:
 		vcpu->arch.ivpr = vcpu->arch.gpr[rs];
 		break;
 	case SPRN_IVOR0:
 		vcpu->arch.ivor[BOOKE_IRQPRIO_CRITICAL] = vcpu->arch.gpr[rs];
 		break;
 	case SPRN_IVOR1:
 		vcpu->arch.ivor[BOOKE_IRQPRIO_MACHINE_CHECK] = vcpu->arch.gpr[rs];
 		break;
 	case SPRN_IVOR2:
 		vcpu->arch.ivor[BOOKE_IRQPRIO_DATA_STORAGE] = vcpu->arch.gpr[rs];
 		break;
 	case SPRN_IVOR3:
 		vcpu->arch.ivor[BOOKE_IRQPRIO_INST_STORAGE] = vcpu->arch.gpr[rs];
 		break;
 	case SPRN_IVOR4:
 		vcpu->arch.ivor[BOOKE_IRQPRIO_EXTERNAL] = vcpu->arch.gpr[rs];
 		break;
 	case SPRN_IVOR5:
 		vcpu->arch.ivor[BOOKE_IRQPRIO_ALIGNMENT] = vcpu->arch.gpr[rs];
 		break;
 	case SPRN_IVOR6:
 		vcpu->arch.ivor[BOOKE_IRQPRIO_PROGRAM] = vcpu->arch.gpr[rs];
 		break;
 	case SPRN_IVOR7:
 		vcpu->arch.ivor[BOOKE_IRQPRIO_FP_UNAVAIL] = vcpu->arch.gpr[rs];
 		break;
 	case SPRN_IVOR8:
 		vcpu->arch.ivor[BOOKE_IRQPRIO_SYSCALL] = vcpu->arch.gpr[rs];
 		break;
 	case SPRN_IVOR9:
 		vcpu->arch.ivor[BOOKE_IRQPRIO_AP_UNAVAIL] = vcpu->arch.gpr[rs];
 		break;
 	case SPRN_IVOR10:
 		vcpu->arch.ivor[BOOKE_IRQPRIO_DECREMENTER] = vcpu->arch.gpr[rs];
 		break;
 	case SPRN_IVOR11:
 		vcpu->arch.ivor[BOOKE_IRQPRIO_FIT] = vcpu->arch.gpr[rs];
 		break;
 	case SPRN_IVOR12:
 		vcpu->arch.ivor[BOOKE_IRQPRIO_WATCHDOG] = vcpu->arch.gpr[rs];
 		break;
 	case SPRN_IVOR13:
 		vcpu->arch.ivor[BOOKE_IRQPRIO_DTLB_MISS] = vcpu->arch.gpr[rs];
 		break;
 	case SPRN_IVOR14:
 		vcpu->arch.ivor[BOOKE_IRQPRIO_ITLB_MISS] = vcpu->arch.gpr[rs];
 		break;
 	case SPRN_IVOR15:
 		vcpu->arch.ivor[BOOKE_IRQPRIO_DEBUG] = vcpu->arch.gpr[rs];
 		break;

 	default:
 		return EMULATE_FAIL;
 	}

 	kvmppc_set_exit_type(vcpu, EMULATED_MTSPR_EXITS);
 	return EMULATE_DONE;
 }

 int kvmppc_core_emulate_mfspr(struct kvm_vcpu *vcpu, int sprn, int rt)
 {
 	switch (sprn) {
 	/* 440 */
 	case SPRN_MMUCR:
 		vcpu->arch.gpr[rt] = vcpu->arch.mmucr; break;
 	case SPRN_CCR0:
 		vcpu->arch.gpr[rt] = vcpu->arch.ccr0; break;
 	case SPRN_CCR1:
 		vcpu->arch.gpr[rt] = vcpu->arch.ccr1; break;

 	/* Book E */
 	case SPRN_PID:
 		vcpu->arch.gpr[rt] = vcpu->arch.pid; break;
 	case SPRN_IVPR:
 		vcpu->arch.gpr[rt] = vcpu->arch.ivpr; break;
 	case SPRN_DEAR:
 		vcpu->arch.gpr[rt] = vcpu->arch.dear; break;
 	case SPRN_ESR:
 		vcpu->arch.gpr[rt] = vcpu->arch.esr; break;
 	case SPRN_DBCR0:
 		vcpu->arch.gpr[rt] = vcpu->arch.dbcr0; break;
 	case SPRN_DBCR1:
 		vcpu->arch.gpr[rt] = vcpu->arch.dbcr1; break;

 	case SPRN_IVOR0:
 		vcpu->arch.gpr[rt] = vcpu->arch.ivor[BOOKE_IRQPRIO_CRITICAL];
 		break;
 	case SPRN_IVOR1:
 		vcpu->arch.gpr[rt] = vcpu->arch.ivor[BOOKE_IRQPRIO_MACHINE_CHECK];
 		break;
 	case SPRN_IVOR2:
 		vcpu->arch.gpr[rt] = vcpu->arch.ivor[BOOKE_IRQPRIO_DATA_STORAGE];
 		break;
 	case SPRN_IVOR3:
 		vcpu->arch.gpr[rt] = vcpu->arch.ivor[BOOKE_IRQPRIO_INST_STORAGE];
 		break;
 	case SPRN_IVOR4:
 		vcpu->arch.gpr[rt] = vcpu->arch.ivor[BOOKE_IRQPRIO_EXTERNAL];
 		break;
 	case SPRN_IVOR5:
 		vcpu->arch.gpr[rt] = vcpu->arch.ivor[BOOKE_IRQPRIO_ALIGNMENT];
 		break;
 	case SPRN_IVOR6:
 		vcpu->arch.gpr[rt] = vcpu->arch.ivor[BOOKE_IRQPRIO_PROGRAM];
 		break;
 	case SPRN_IVOR7:
 		vcpu->arch.gpr[rt] = vcpu->arch.ivor[BOOKE_IRQPRIO_FP_UNAVAIL];
 		break;
 	case SPRN_IVOR8:
 		vcpu->arch.gpr[rt] = vcpu->arch.ivor[BOOKE_IRQPRIO_SYSCALL];
 		break;
 	case SPRN_IVOR9:
 		vcpu->arch.gpr[rt] = vcpu->arch.ivor[BOOKE_IRQPRIO_AP_UNAVAIL];
 		break;
 	case SPRN_IVOR10:
 		vcpu->arch.gpr[rt] = vcpu->arch.ivor[BOOKE_IRQPRIO_DECREMENTER];
 		break;
 	case SPRN_IVOR11:
 		vcpu->arch.gpr[rt] = vcpu->arch.ivor[BOOKE_IRQPRIO_FIT];
 		break;
 	case SPRN_IVOR12:
 		vcpu->arch.gpr[rt] = vcpu->arch.ivor[BOOKE_IRQPRIO_WATCHDOG];
 		break;
 	case SPRN_IVOR13:
 		vcpu->arch.gpr[rt] = vcpu->arch.ivor[BOOKE_IRQPRIO_DTLB_MISS];
 		break;
 	case SPRN_IVOR14:
 		vcpu->arch.gpr[rt] = vcpu->arch.ivor[BOOKE_IRQPRIO_ITLB_MISS];
 		break;
 	case SPRN_IVOR15:
 		vcpu->arch.gpr[rt] = vcpu->arch.ivor[BOOKE_IRQPRIO_DEBUG];
 		break;

 	default:
 		return EMULATE_FAIL;
 	}

 	kvmppc_set_exit_type(vcpu, EMULATED_MFSPR_EXITS);
 	return EMULATE_DONE;
 }
	/*
	* 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. 2008
	*
	* Authors: Hollis Blanchard <hollisb@us.ibm.com>
	*/

	#include <asm/kvm_ppc.h>
	#include <asm/dcr.h>
	#include <asm/dcr-regs.h>
	#include <asm/disassemble.h>
	#include <asm/kvm_44x.h>
	#include "timing.h"

	#include "booke.h"
	#include "44x_tlb.h"

	#define OP_RFI 19

	#define XOP_RFI 50
	#define XOP_MFMSR 83
	#define XOP_WRTEE 131
	#define XOP_MTMSR 146
	#define XOP_WRTEEI 163
	#define XOP_MFDCR 323
	#define XOP_MTDCR 451
	#define XOP_TLBSX 914
	#define XOP_ICCCI 966
	#define XOP_TLBWE 978

	static void kvmppc_emul_rfi(struct kvm_vcpu *vcpu)
	{
	vcpu->arch.pc = vcpu->arch.srr0;
	kvmppc_set_msr(vcpu, vcpu->arch.srr1);
	}

	int kvmppc_core_emulate_op(struct kvm_run run, struct kvm_vcpu vcpu,
	unsigned int inst, int *advance)
	{
	int emulated = EMULATE_DONE;
	int dcrn;
	int ra;
	int rb;
	int rc;
	int rs;
	int rt;
	int ws;

	switch (get_op(inst)) {
	case OP_RFI:
	switch (get_xop(inst)) {
	case XOP_RFI:
	kvmppc_emul_rfi(vcpu);
	kvmppc_set_exit_type(vcpu, EMULATED_RFI_EXITS);
	*advance = 0;
	break;

	default:
	emulated = EMULATE_FAIL;
	break;
	}
	break;

	case 31:
	switch (get_xop(inst)) {

	case XOP_MFMSR:
	rt = get_rt(inst);
	vcpu->arch.gpr[rt] = vcpu->arch.msr;
	kvmppc_set_exit_type(vcpu, EMULATED_MFMSR_EXITS);
	break;

	case XOP_MTMSR:
	rs = get_rs(inst);
	kvmppc_set_exit_type(vcpu, EMULATED_MTMSR_EXITS);
	kvmppc_set_msr(vcpu, vcpu->arch.gpr[rs]);
	break;

	case XOP_WRTEE:
	rs = get_rs(inst);
	vcpu->arch.msr = (vcpu->arch.msr & ~MSR_EE)
	\| (vcpu->arch.gpr[rs] & MSR_EE);
	kvmppc_set_exit_type(vcpu, EMULATED_WRTEE_EXITS);
	break;

	case XOP_WRTEEI:
	vcpu->arch.msr = (vcpu->arch.msr & ~MSR_EE)
	\| (inst & MSR_EE);
	kvmppc_set_exit_type(vcpu, EMULATED_WRTEE_EXITS);
	break;

	case XOP_MFDCR:
	dcrn = get_dcrn(inst);
	rt = get_rt(inst);

	/* The guest may access CPR0 registers to determine the timebase
	* frequency, and it must know the real host frequency because it
	* can directly access the timebase registers.
	*
	* It would be possible to emulate those accesses in userspace,
	* but userspace can really only figure out the end frequency.
	* We could decompose that into the factors that compute it, but
	* that's tricky math, and it's easier to just report the real
	* CPR0 values.
	*/
	switch (dcrn) {
	case DCRN_CPR0_CONFIG_ADDR:
	vcpu->arch.gpr[rt] = vcpu->arch.cpr0_cfgaddr;
	break;
	case DCRN_CPR0_CONFIG_DATA:
	local_irq_disable();
	mtdcr(DCRN_CPR0_CONFIG_ADDR,
	vcpu->arch.cpr0_cfgaddr);
	vcpu->arch.gpr[rt] = mfdcr(DCRN_CPR0_CONFIG_DATA);
	local_irq_enable();
	break;
	default:
	run->dcr.dcrn = dcrn;
	run->dcr.data = 0;
	run->dcr.is_write = 0;
	vcpu->arch.io_gpr = rt;
	vcpu->arch.dcr_needed = 1;
	kvmppc_account_exit(vcpu, DCR_EXITS);
	emulated = EMULATE_DO_DCR;
	}

	break;

	case XOP_MTDCR:
	dcrn = get_dcrn(inst);
	rs = get_rs(inst);

	/* emulate some access in kernel */
	switch (dcrn) {
	case DCRN_CPR0_CONFIG_ADDR:
	vcpu->arch.cpr0_cfgaddr = vcpu->arch.gpr[rs];
	break;
	default:
	run->dcr.dcrn = dcrn;
	run->dcr.data = vcpu->arch.gpr[rs];
	run->dcr.is_write = 1;
	vcpu->arch.dcr_needed = 1;
	kvmppc_account_exit(vcpu, DCR_EXITS);
	emulated = EMULATE_DO_DCR;
	}

	break;

	case XOP_TLBWE:
	ra = get_ra(inst);
	rs = get_rs(inst);
	ws = get_ws(inst);
	emulated = kvmppc_44x_emul_tlbwe(vcpu, ra, rs, ws);
	break;

	case XOP_TLBSX:
	rt = get_rt(inst);
	ra = get_ra(inst);
	rb = get_rb(inst);
	rc = get_rc(inst);
	emulated = kvmppc_44x_emul_tlbsx(vcpu, rt, ra, rb, rc);
	break;

	case XOP_ICCCI:
	break;

	default:
	emulated = EMULATE_FAIL;
	}

	break;

	default:
	emulated = EMULATE_FAIL;
	}

	return emulated;
	}

	int kvmppc_core_emulate_mtspr(struct kvm_vcpu *vcpu, int sprn, int rs)
	{
	switch (sprn) {
	case SPRN_MMUCR:
	vcpu->arch.mmucr = vcpu->arch.gpr[rs]; break;
	case SPRN_PID:
	kvmppc_set_pid(vcpu, vcpu->arch.gpr[rs]); break;
	case SPRN_CCR0:
	vcpu->arch.ccr0 = vcpu->arch.gpr[rs]; break;
	case SPRN_CCR1:
	vcpu->arch.ccr1 = vcpu->arch.gpr[rs]; break;
	case SPRN_DEAR:
	vcpu->arch.dear = vcpu->arch.gpr[rs]; break;
	case SPRN_ESR:
	vcpu->arch.esr = vcpu->arch.gpr[rs]; break;
	case SPRN_DBCR0:
	vcpu->arch.dbcr0 = vcpu->arch.gpr[rs]; break;
	case SPRN_DBCR1:
	vcpu->arch.dbcr1 = vcpu->arch.gpr[rs]; break;
	case SPRN_TSR:
	vcpu->arch.tsr &= ~vcpu->arch.gpr[rs]; break;
	case SPRN_TCR:
	vcpu->arch.tcr = vcpu->arch.gpr[rs];
	kvmppc_emulate_dec(vcpu);
	break;

	/* Note: SPRG4-7 are user-readable. These values are
	* loaded into the real SPRGs when resuming the
	* guest. */
	case SPRN_SPRG4:
	vcpu->arch.sprg4 = vcpu->arch.gpr[rs]; break;
	case SPRN_SPRG5:
	vcpu->arch.sprg5 = vcpu->arch.gpr[rs]; break;
	case SPRN_SPRG6:
	vcpu->arch.sprg6 = vcpu->arch.gpr[rs]; break;
	case SPRN_SPRG7:
	vcpu->arch.sprg7 = vcpu->arch.gpr[rs]; break;

	case SPRN_IVPR:
	vcpu->arch.ivpr = vcpu->arch.gpr[rs];
	break;
	case SPRN_IVOR0:
	vcpu->arch.ivor[BOOKE_IRQPRIO_CRITICAL] = vcpu->arch.gpr[rs];
	break;
	case SPRN_IVOR1:
	vcpu->arch.ivor[BOOKE_IRQPRIO_MACHINE_CHECK] = vcpu->arch.gpr[rs];
	break;
	case SPRN_IVOR2:
	vcpu->arch.ivor[BOOKE_IRQPRIO_DATA_STORAGE] = vcpu->arch.gpr[rs];
	break;
	case SPRN_IVOR3:
	vcpu->arch.ivor[BOOKE_IRQPRIO_INST_STORAGE] = vcpu->arch.gpr[rs];
	break;
	case SPRN_IVOR4:
	vcpu->arch.ivor[BOOKE_IRQPRIO_EXTERNAL] = vcpu->arch.gpr[rs];
	break;
	case SPRN_IVOR5:
	vcpu->arch.ivor[BOOKE_IRQPRIO_ALIGNMENT] = vcpu->arch.gpr[rs];
	break;
	case SPRN_IVOR6:
	vcpu->arch.ivor[BOOKE_IRQPRIO_PROGRAM] = vcpu->arch.gpr[rs];
	break;
	case SPRN_IVOR7:
	vcpu->arch.ivor[BOOKE_IRQPRIO_FP_UNAVAIL] = vcpu->arch.gpr[rs];
	break;
	case SPRN_IVOR8:
	vcpu->arch.ivor[BOOKE_IRQPRIO_SYSCALL] = vcpu->arch.gpr[rs];
	break;
	case SPRN_IVOR9:
	vcpu->arch.ivor[BOOKE_IRQPRIO_AP_UNAVAIL] = vcpu->arch.gpr[rs];
	break;
	case SPRN_IVOR10:
	vcpu->arch.ivor[BOOKE_IRQPRIO_DECREMENTER] = vcpu->arch.gpr[rs];
	break;
	case SPRN_IVOR11:
	vcpu->arch.ivor[BOOKE_IRQPRIO_FIT] = vcpu->arch.gpr[rs];
	break;
	case SPRN_IVOR12:
	vcpu->arch.ivor[BOOKE_IRQPRIO_WATCHDOG] = vcpu->arch.gpr[rs];
	break;
	case SPRN_IVOR13:
	vcpu->arch.ivor[BOOKE_IRQPRIO_DTLB_MISS] = vcpu->arch.gpr[rs];
	break;
	case SPRN_IVOR14:
	vcpu->arch.ivor[BOOKE_IRQPRIO_ITLB_MISS] = vcpu->arch.gpr[rs];
	break;
	case SPRN_IVOR15:
	vcpu->arch.ivor[BOOKE_IRQPRIO_DEBUG] = vcpu->arch.gpr[rs];
	break;

	default:
	return EMULATE_FAIL;
	}

	kvmppc_set_exit_type(vcpu, EMULATED_MTSPR_EXITS);
	return EMULATE_DONE;
	}

	int kvmppc_core_emulate_mfspr(struct kvm_vcpu *vcpu, int sprn, int rt)
	{
	switch (sprn) {
	/* 440 */
	case SPRN_MMUCR:
	vcpu->arch.gpr[rt] = vcpu->arch.mmucr; break;
	case SPRN_CCR0:
	vcpu->arch.gpr[rt] = vcpu->arch.ccr0; break;
	case SPRN_CCR1:
	vcpu->arch.gpr[rt] = vcpu->arch.ccr1; break;

	/* Book E */
	case SPRN_PID:
	vcpu->arch.gpr[rt] = vcpu->arch.pid; break;
	case SPRN_IVPR:
	vcpu->arch.gpr[rt] = vcpu->arch.ivpr; break;
	case SPRN_DEAR:
	vcpu->arch.gpr[rt] = vcpu->arch.dear; break;
	case SPRN_ESR:
	vcpu->arch.gpr[rt] = vcpu->arch.esr; break;
	case SPRN_DBCR0:
	vcpu->arch.gpr[rt] = vcpu->arch.dbcr0; break;
	case SPRN_DBCR1:
	vcpu->arch.gpr[rt] = vcpu->arch.dbcr1; break;

	case SPRN_IVOR0:
	vcpu->arch.gpr[rt] = vcpu->arch.ivor[BOOKE_IRQPRIO_CRITICAL];
	break;
	case SPRN_IVOR1:
	vcpu->arch.gpr[rt] = vcpu->arch.ivor[BOOKE_IRQPRIO_MACHINE_CHECK];
	break;
	case SPRN_IVOR2:
	vcpu->arch.gpr[rt] = vcpu->arch.ivor[BOOKE_IRQPRIO_DATA_STORAGE];
	break;
	case SPRN_IVOR3:
	vcpu->arch.gpr[rt] = vcpu->arch.ivor[BOOKE_IRQPRIO_INST_STORAGE];
	break;
	case SPRN_IVOR4:
	vcpu->arch.gpr[rt] = vcpu->arch.ivor[BOOKE_IRQPRIO_EXTERNAL];
	break;
	case SPRN_IVOR5:
	vcpu->arch.gpr[rt] = vcpu->arch.ivor[BOOKE_IRQPRIO_ALIGNMENT];
	break;
	case SPRN_IVOR6:
	vcpu->arch.gpr[rt] = vcpu->arch.ivor[BOOKE_IRQPRIO_PROGRAM];
	break;
	case SPRN_IVOR7:
	vcpu->arch.gpr[rt] = vcpu->arch.ivor[BOOKE_IRQPRIO_FP_UNAVAIL];
	break;
	case SPRN_IVOR8:
	vcpu->arch.gpr[rt] = vcpu->arch.ivor[BOOKE_IRQPRIO_SYSCALL];
	break;
	case SPRN_IVOR9:
	vcpu->arch.gpr[rt] = vcpu->arch.ivor[BOOKE_IRQPRIO_AP_UNAVAIL];
	break;
	case SPRN_IVOR10:
	vcpu->arch.gpr[rt] = vcpu->arch.ivor[BOOKE_IRQPRIO_DECREMENTER];
	break;
	case SPRN_IVOR11:
	vcpu->arch.gpr[rt] = vcpu->arch.ivor[BOOKE_IRQPRIO_FIT];
	break;
	case SPRN_IVOR12:
	vcpu->arch.gpr[rt] = vcpu->arch.ivor[BOOKE_IRQPRIO_WATCHDOG];
	break;
	case SPRN_IVOR13:
	vcpu->arch.gpr[rt] = vcpu->arch.ivor[BOOKE_IRQPRIO_DTLB_MISS];
	break;
	case SPRN_IVOR14:
	vcpu->arch.gpr[rt] = vcpu->arch.ivor[BOOKE_IRQPRIO_ITLB_MISS];
	break;
	case SPRN_IVOR15:
	vcpu->arch.gpr[rt] = vcpu->arch.ivor[BOOKE_IRQPRIO_DEBUG];
	break;

	default:
	return EMULATE_FAIL;
	}

	kvmppc_set_exit_type(vcpu, EMULATED_MFSPR_EXITS);
	return EMULATE_DONE;
	}