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linux-sg2042/arch/powerpc/kvm/booke_emulate.c

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/*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License, version 2, as
* published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*
* Copyright IBM Corp. 2008
* Copyright 2011 Freescale Semiconductor, Inc.
*
* Authors: Hollis Blanchard <hollisb@us.ibm.com>
*/
#include <linux/kvm_host.h>
#include <asm/disassemble.h>
#include "booke.h"
#define OP_19_XOP_RFI 50
#define OP_19_XOP_RFCI 51
#define OP_31_XOP_MFMSR 83
#define OP_31_XOP_WRTEE 131
#define OP_31_XOP_MTMSR 146
#define OP_31_XOP_WRTEEI 163
static void kvmppc_emul_rfi(struct kvm_vcpu *vcpu)
{
vcpu->arch.pc = vcpu->arch.shared->srr0;
kvmppc_set_msr(vcpu, vcpu->arch.shared->srr1);
}
static void kvmppc_emul_rfci(struct kvm_vcpu *vcpu)
{
vcpu->arch.pc = vcpu->arch.csrr0;
kvmppc_set_msr(vcpu, vcpu->arch.csrr1);
}
int kvmppc_booke_emulate_op(struct kvm_run *run, struct kvm_vcpu *vcpu,
unsigned int inst, int *advance)
{
int emulated = EMULATE_DONE;
int rs = get_rs(inst);
int rt = get_rt(inst);
switch (get_op(inst)) {
case 19:
switch (get_xop(inst)) {
case OP_19_XOP_RFI:
kvmppc_emul_rfi(vcpu);
kvmppc_set_exit_type(vcpu, EMULATED_RFI_EXITS);
*advance = 0;
break;
case OP_19_XOP_RFCI:
kvmppc_emul_rfci(vcpu);
kvmppc_set_exit_type(vcpu, EMULATED_RFCI_EXITS);
*advance = 0;
break;
default:
emulated = EMULATE_FAIL;
break;
}
break;
case 31:
switch (get_xop(inst)) {
case OP_31_XOP_MFMSR:
kvmppc_set_gpr(vcpu, rt, vcpu->arch.shared->msr);
kvmppc_set_exit_type(vcpu, EMULATED_MFMSR_EXITS);
break;
case OP_31_XOP_MTMSR:
kvmppc_set_exit_type(vcpu, EMULATED_MTMSR_EXITS);
kvmppc_set_msr(vcpu, kvmppc_get_gpr(vcpu, rs));
break;
case OP_31_XOP_WRTEE:
vcpu->arch.shared->msr = (vcpu->arch.shared->msr & ~MSR_EE)
| (kvmppc_get_gpr(vcpu, rs) & MSR_EE);
kvmppc_set_exit_type(vcpu, EMULATED_WRTEE_EXITS);
break;
case OP_31_XOP_WRTEEI:
vcpu->arch.shared->msr = (vcpu->arch.shared->msr & ~MSR_EE)
| (inst & MSR_EE);
kvmppc_set_exit_type(vcpu, EMULATED_WRTEE_EXITS);
break;
default:
emulated = EMULATE_FAIL;
}
break;
default:
emulated = EMULATE_FAIL;
}
return emulated;
}
/*
* NOTE: some of these registers are not emulated on BOOKE_HV (GS-mode).
* Their backing store is in real registers, and these functions
* will return the wrong result if called for them in another context
* (such as debugging).
*/
int kvmppc_booke_emulate_mtspr(struct kvm_vcpu *vcpu, int sprn, ulong spr_val)
{
int emulated = EMULATE_DONE;
switch (sprn) {
case SPRN_DEAR:
vcpu->arch.shared->dar = spr_val;
break;
case SPRN_ESR:
vcpu->arch.shared->esr = spr_val;
break;
case SPRN_CSRR0:
vcpu->arch.csrr0 = spr_val;
break;
case SPRN_CSRR1:
vcpu->arch.csrr1 = spr_val;
break;
case SPRN_DBCR0:
vcpu->arch.dbg_reg.dbcr0 = spr_val;
break;
case SPRN_DBCR1:
vcpu->arch.dbg_reg.dbcr1 = spr_val;
break;
case SPRN_DBSR:
vcpu->arch.dbsr &= ~spr_val;
break;
case SPRN_TSR:
kvmppc_clr_tsr_bits(vcpu, spr_val);
break;
case SPRN_TCR:
/*
* WRC is a 2-bit field that is supposed to preserve its
* value once written to non-zero.
*/
if (vcpu->arch.tcr & TCR_WRC_MASK) {
spr_val &= ~TCR_WRC_MASK;
spr_val |= vcpu->arch.tcr & TCR_WRC_MASK;
}
kvmppc_set_tcr(vcpu, spr_val);
break;
case SPRN_DECAR:
vcpu->arch.decar = spr_val;
break;
/*
* Note: SPRG4-7 are user-readable.
* These values are loaded into the real SPRGs when resuming the
* guest (PR-mode only).
*/
case SPRN_SPRG4:
vcpu->arch.shared->sprg4 = spr_val;
break;
case SPRN_SPRG5:
vcpu->arch.shared->sprg5 = spr_val;
break;
case SPRN_SPRG6:
vcpu->arch.shared->sprg6 = spr_val;
break;
case SPRN_SPRG7:
vcpu->arch.shared->sprg7 = spr_val;
break;
case SPRN_IVPR:
vcpu->arch.ivpr = spr_val;
#ifdef CONFIG_KVM_BOOKE_HV
mtspr(SPRN_GIVPR, spr_val);
#endif
break;
case SPRN_IVOR0:
vcpu->arch.ivor[BOOKE_IRQPRIO_CRITICAL] = spr_val;
break;
case SPRN_IVOR1:
vcpu->arch.ivor[BOOKE_IRQPRIO_MACHINE_CHECK] = spr_val;
break;
case SPRN_IVOR2:
vcpu->arch.ivor[BOOKE_IRQPRIO_DATA_STORAGE] = spr_val;
#ifdef CONFIG_KVM_BOOKE_HV
mtspr(SPRN_GIVOR2, spr_val);
#endif
break;
case SPRN_IVOR3:
vcpu->arch.ivor[BOOKE_IRQPRIO_INST_STORAGE] = spr_val;
break;
case SPRN_IVOR4:
vcpu->arch.ivor[BOOKE_IRQPRIO_EXTERNAL] = spr_val;
break;
case SPRN_IVOR5:
vcpu->arch.ivor[BOOKE_IRQPRIO_ALIGNMENT] = spr_val;
break;
case SPRN_IVOR6:
vcpu->arch.ivor[BOOKE_IRQPRIO_PROGRAM] = spr_val;
break;
case SPRN_IVOR7:
vcpu->arch.ivor[BOOKE_IRQPRIO_FP_UNAVAIL] = spr_val;
break;
case SPRN_IVOR8:
vcpu->arch.ivor[BOOKE_IRQPRIO_SYSCALL] = spr_val;
#ifdef CONFIG_KVM_BOOKE_HV
mtspr(SPRN_GIVOR8, spr_val);
#endif
break;
case SPRN_IVOR9:
vcpu->arch.ivor[BOOKE_IRQPRIO_AP_UNAVAIL] = spr_val;
break;
case SPRN_IVOR10:
vcpu->arch.ivor[BOOKE_IRQPRIO_DECREMENTER] = spr_val;
break;
case SPRN_IVOR11:
vcpu->arch.ivor[BOOKE_IRQPRIO_FIT] = spr_val;
break;
case SPRN_IVOR12:
vcpu->arch.ivor[BOOKE_IRQPRIO_WATCHDOG] = spr_val;
break;
case SPRN_IVOR13:
vcpu->arch.ivor[BOOKE_IRQPRIO_DTLB_MISS] = spr_val;
break;
case SPRN_IVOR14:
vcpu->arch.ivor[BOOKE_IRQPRIO_ITLB_MISS] = spr_val;
break;
case SPRN_IVOR15:
vcpu->arch.ivor[BOOKE_IRQPRIO_DEBUG] = spr_val;
break;
case SPRN_MCSR:
vcpu->arch.mcsr &= ~spr_val;
break;
#if defined(CONFIG_64BIT)
case SPRN_EPCR:
kvmppc_set_epcr(vcpu, spr_val);
#ifdef CONFIG_KVM_BOOKE_HV
mtspr(SPRN_EPCR, vcpu->arch.shadow_epcr);
#endif
break;
#endif
default:
emulated = EMULATE_FAIL;
}
return emulated;
}
int kvmppc_booke_emulate_mfspr(struct kvm_vcpu *vcpu, int sprn, ulong *spr_val)
{
int emulated = EMULATE_DONE;
switch (sprn) {
case SPRN_IVPR:
*spr_val = vcpu->arch.ivpr;
break;
case SPRN_DEAR:
*spr_val = vcpu->arch.shared->dar;
break;
case SPRN_ESR:
*spr_val = vcpu->arch.shared->esr;
break;
case SPRN_EPR:
*spr_val = vcpu->arch.epr;
break;
case SPRN_CSRR0:
*spr_val = vcpu->arch.csrr0;
break;
case SPRN_CSRR1:
*spr_val = vcpu->arch.csrr1;
break;
case SPRN_DBCR0:
*spr_val = vcpu->arch.dbg_reg.dbcr0;
break;
case SPRN_DBCR1:
*spr_val = vcpu->arch.dbg_reg.dbcr1;
break;
case SPRN_DBSR:
*spr_val = vcpu->arch.dbsr;
break;
case SPRN_TSR:
*spr_val = vcpu->arch.tsr;
break;
case SPRN_TCR:
*spr_val = vcpu->arch.tcr;
break;
case SPRN_IVOR0:
*spr_val = vcpu->arch.ivor[BOOKE_IRQPRIO_CRITICAL];
break;
case SPRN_IVOR1:
*spr_val = vcpu->arch.ivor[BOOKE_IRQPRIO_MACHINE_CHECK];
break;
case SPRN_IVOR2:
*spr_val = vcpu->arch.ivor[BOOKE_IRQPRIO_DATA_STORAGE];
break;
case SPRN_IVOR3:
*spr_val = vcpu->arch.ivor[BOOKE_IRQPRIO_INST_STORAGE];
break;
case SPRN_IVOR4:
*spr_val = vcpu->arch.ivor[BOOKE_IRQPRIO_EXTERNAL];
break;
case SPRN_IVOR5:
*spr_val = vcpu->arch.ivor[BOOKE_IRQPRIO_ALIGNMENT];
break;
case SPRN_IVOR6:
*spr_val = vcpu->arch.ivor[BOOKE_IRQPRIO_PROGRAM];
break;
case SPRN_IVOR7:
*spr_val = vcpu->arch.ivor[BOOKE_IRQPRIO_FP_UNAVAIL];
break;
case SPRN_IVOR8:
*spr_val = vcpu->arch.ivor[BOOKE_IRQPRIO_SYSCALL];
break;
case SPRN_IVOR9:
*spr_val = vcpu->arch.ivor[BOOKE_IRQPRIO_AP_UNAVAIL];
break;
case SPRN_IVOR10:
*spr_val = vcpu->arch.ivor[BOOKE_IRQPRIO_DECREMENTER];
break;
case SPRN_IVOR11:
*spr_val = vcpu->arch.ivor[BOOKE_IRQPRIO_FIT];
break;
case SPRN_IVOR12:
*spr_val = vcpu->arch.ivor[BOOKE_IRQPRIO_WATCHDOG];
break;
case SPRN_IVOR13:
*spr_val = vcpu->arch.ivor[BOOKE_IRQPRIO_DTLB_MISS];
break;
case SPRN_IVOR14:
*spr_val = vcpu->arch.ivor[BOOKE_IRQPRIO_ITLB_MISS];
break;
case SPRN_IVOR15:
*spr_val = vcpu->arch.ivor[BOOKE_IRQPRIO_DEBUG];
break;
case SPRN_MCSR:
*spr_val = vcpu->arch.mcsr;
break;
#if defined(CONFIG_64BIT)
case SPRN_EPCR:
*spr_val = vcpu->arch.epcr;
break;
#endif
default:
emulated = EMULATE_FAIL;
}
return emulated;
}
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