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linux/arch/powerpc/kvm/booke_emulate.c
Alexander Graf 8e5b26b55a KVM: PPC: Use accessor functions for GPR access 
All code in PPC KVM currently accesses gprs in the vcpu struct directly.

While there's nothing wrong with that wrt the current way gprs are stored
and loaded, it doesn't suffice for the PACA acceleration that will follow
in this patchset.

So let's just create little wrapper inline functions that we call whenever
a GPR needs to be read from or written to. The compiled code shouldn't really
change at all for now.

Signed-off-by: Alexander Graf <agraf@suse.de>
Signed-off-by: Avi Kivity <avi@redhat.com>
2010-03-01 12:35:47 -03:00

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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
*
* 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_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.srr0;
kvmppc_set_msr(vcpu, vcpu->arch.srr1);
}
int kvmppc_booke_emulate_op(struct kvm_run *run, struct kvm_vcpu *vcpu,
unsigned int inst, int *advance)
{
int emulated = EMULATE_DONE;
int rs;
int rt;
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;
default:
emulated = EMULATE_FAIL;
break;
}
break;
case 31:
switch (get_xop(inst)) {
case OP_31_XOP_MFMSR:
rt = get_rt(inst);
kvmppc_set_gpr(vcpu, rt, vcpu->arch.msr);
kvmppc_set_exit_type(vcpu, EMULATED_MFMSR_EXITS);
break;
case OP_31_XOP_MTMSR:
rs = get_rs(inst);
kvmppc_set_exit_type(vcpu, EMULATED_MTMSR_EXITS);
kvmppc_set_msr(vcpu, kvmppc_get_gpr(vcpu, rs));
break;
case OP_31_XOP_WRTEE:
rs = get_rs(inst);
vcpu->arch.msr = (vcpu->arch.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.msr = (vcpu->arch.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;
}
int kvmppc_booke_emulate_mtspr(struct kvm_vcpu *vcpu, int sprn, int rs)
{
int emulated = EMULATE_DONE;
ulong spr_val = kvmppc_get_gpr(vcpu, rs);
switch (sprn) {
case SPRN_DEAR:
vcpu->arch.dear = spr_val; break;
case SPRN_ESR:
vcpu->arch.esr = spr_val; break;
case SPRN_DBCR0:
vcpu->arch.dbcr0 = spr_val; break;
case SPRN_DBCR1:
vcpu->arch.dbcr1 = spr_val; break;
case SPRN_DBSR:
vcpu->arch.dbsr &= ~spr_val; break;
case SPRN_TSR:
vcpu->arch.tsr &= ~spr_val; break;
case SPRN_TCR:
vcpu->arch.tcr = spr_val;
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 = spr_val; break;
case SPRN_SPRG5:
vcpu->arch.sprg5 = spr_val; break;
case SPRN_SPRG6:
vcpu->arch.sprg6 = spr_val; break;
case SPRN_SPRG7:
vcpu->arch.sprg7 = spr_val; break;
case SPRN_IVPR:
vcpu->arch.ivpr = spr_val;
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;
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;
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;
default:
emulated = EMULATE_FAIL;
}
return emulated;
}
int kvmppc_booke_emulate_mfspr(struct kvm_vcpu *vcpu, int sprn, int rt)
{
int emulated = EMULATE_DONE;
switch (sprn) {
case SPRN_IVPR:
kvmppc_set_gpr(vcpu, rt, vcpu->arch.ivpr); break;
case SPRN_DEAR:
kvmppc_set_gpr(vcpu, rt, vcpu->arch.dear); break;
case SPRN_ESR:
kvmppc_set_gpr(vcpu, rt, vcpu->arch.esr); break;
case SPRN_DBCR0:
kvmppc_set_gpr(vcpu, rt, vcpu->arch.dbcr0); break;
case SPRN_DBCR1:
kvmppc_set_gpr(vcpu, rt, vcpu->arch.dbcr1); break;
case SPRN_DBSR:
kvmppc_set_gpr(vcpu, rt, vcpu->arch.dbsr); break;
case SPRN_IVOR0:
kvmppc_set_gpr(vcpu, rt, vcpu->arch.ivor[BOOKE_IRQPRIO_CRITICAL]);
break;
case SPRN_IVOR1:
kvmppc_set_gpr(vcpu, rt, vcpu->arch.ivor[BOOKE_IRQPRIO_MACHINE_CHECK]);
break;
case SPRN_IVOR2:
kvmppc_set_gpr(vcpu, rt, vcpu->arch.ivor[BOOKE_IRQPRIO_DATA_STORAGE]);
break;
case SPRN_IVOR3:
kvmppc_set_gpr(vcpu, rt, vcpu->arch.ivor[BOOKE_IRQPRIO_INST_STORAGE]);
break;
case SPRN_IVOR4:
kvmppc_set_gpr(vcpu, rt, vcpu->arch.ivor[BOOKE_IRQPRIO_EXTERNAL]);
break;
case SPRN_IVOR5:
kvmppc_set_gpr(vcpu, rt, vcpu->arch.ivor[BOOKE_IRQPRIO_ALIGNMENT]);
break;
case SPRN_IVOR6:
kvmppc_set_gpr(vcpu, rt, vcpu->arch.ivor[BOOKE_IRQPRIO_PROGRAM]);
break;
case SPRN_IVOR7:
kvmppc_set_gpr(vcpu, rt, vcpu->arch.ivor[BOOKE_IRQPRIO_FP_UNAVAIL]);
break;
case SPRN_IVOR8:
kvmppc_set_gpr(vcpu, rt, vcpu->arch.ivor[BOOKE_IRQPRIO_SYSCALL]);
break;
case SPRN_IVOR9:
kvmppc_set_gpr(vcpu, rt, vcpu->arch.ivor[BOOKE_IRQPRIO_AP_UNAVAIL]);
break;
case SPRN_IVOR10:
kvmppc_set_gpr(vcpu, rt, vcpu->arch.ivor[BOOKE_IRQPRIO_DECREMENTER]);
break;
case SPRN_IVOR11:
kvmppc_set_gpr(vcpu, rt, vcpu->arch.ivor[BOOKE_IRQPRIO_FIT]);
break;
case SPRN_IVOR12:
kvmppc_set_gpr(vcpu, rt, vcpu->arch.ivor[BOOKE_IRQPRIO_WATCHDOG]);
break;
case SPRN_IVOR13:
kvmppc_set_gpr(vcpu, rt, vcpu->arch.ivor[BOOKE_IRQPRIO_DTLB_MISS]);
break;
case SPRN_IVOR14:
kvmppc_set_gpr(vcpu, rt, vcpu->arch.ivor[BOOKE_IRQPRIO_ITLB_MISS]);
break;
case SPRN_IVOR15:
kvmppc_set_gpr(vcpu, rt, vcpu->arch.ivor[BOOKE_IRQPRIO_DEBUG]);
break;
default:
emulated = EMULATE_FAIL;
}
return emulated;
}
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