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-rw-r--r--arch/powerpc/kvm/emulate.c146
1 files changed, 48 insertions, 98 deletions
diff --git a/arch/powerpc/kvm/emulate.c b/arch/powerpc/kvm/emulate.c
index afc9154f1aef..f90e86dea7a2 100644
--- a/arch/powerpc/kvm/emulate.c
+++ b/arch/powerpc/kvm/emulate.c
@@ -23,6 +23,7 @@
#include <linux/types.h>
#include <linux/string.h>
#include <linux/kvm_host.h>
+#include <linux/clockchips.h>
#include <asm/reg.h>
#include <asm/time.h>
@@ -104,8 +105,12 @@ void kvmppc_emulate_dec(struct kvm_vcpu *vcpu)
*/
dec_time = vcpu->arch.dec;
- dec_time *= 1000;
- do_div(dec_time, tb_ticks_per_usec);
+ /*
+ * Guest timebase ticks at the same frequency as host decrementer.
+ * So use the host decrementer calculations for decrementer emulation.
+ */
+ dec_time = dec_time << decrementer_clockevent.shift;
+ do_div(dec_time, decrementer_clockevent.mult);
dec_nsec = do_div(dec_time, NSEC_PER_SEC);
hrtimer_start(&vcpu->arch.dec_timer,
ktime_set(dec_time, dec_nsec), HRTIMER_MODE_REL);
@@ -143,13 +148,13 @@ u32 kvmppc_get_dec(struct kvm_vcpu *vcpu, u64 tb)
int kvmppc_emulate_instruction(struct kvm_run *run, struct kvm_vcpu *vcpu)
{
u32 inst = kvmppc_get_last_inst(vcpu);
- int ra;
- int rb;
- int rs;
- int rt;
- int sprn;
+ int ra = get_ra(inst);
+ int rs = get_rs(inst);
+ int rt = get_rt(inst);
+ int sprn = get_sprn(inst);
enum emulation_result emulated = EMULATE_DONE;
int advance = 1;
+ ulong spr_val = 0;
/* this default type might be overwritten by subcategories */
kvmppc_set_exit_type(vcpu, EMULATED_INST_EXITS);
@@ -184,141 +189,116 @@ int kvmppc_emulate_instruction(struct kvm_run *run, struct kvm_vcpu *vcpu)
advance = 0;
break;
case OP_31_XOP_LWZX:
- rt = get_rt(inst);
emulated = kvmppc_handle_load(run, vcpu, rt, 4, 1);
break;
case OP_31_XOP_LBZX:
- rt = get_rt(inst);
emulated = kvmppc_handle_load(run, vcpu, rt, 1, 1);
break;
case OP_31_XOP_LBZUX:
- rt = get_rt(inst);
- ra = get_ra(inst);
- rb = get_rb(inst);
-
emulated = kvmppc_handle_load(run, vcpu, rt, 1, 1);
kvmppc_set_gpr(vcpu, ra, vcpu->arch.vaddr_accessed);
break;
case OP_31_XOP_STWX:
- rs = get_rs(inst);
emulated = kvmppc_handle_store(run, vcpu,
kvmppc_get_gpr(vcpu, rs),
4, 1);
break;
case OP_31_XOP_STBX:
- rs = get_rs(inst);
emulated = kvmppc_handle_store(run, vcpu,
kvmppc_get_gpr(vcpu, rs),
1, 1);
break;
case OP_31_XOP_STBUX:
- rs = get_rs(inst);
- ra = get_ra(inst);
- rb = get_rb(inst);
-
emulated = kvmppc_handle_store(run, vcpu,
kvmppc_get_gpr(vcpu, rs),
1, 1);
- kvmppc_set_gpr(vcpu, rs, vcpu->arch.vaddr_accessed);
+ kvmppc_set_gpr(vcpu, ra, vcpu->arch.vaddr_accessed);
break;
case OP_31_XOP_LHAX:
- rt = get_rt(inst);
emulated = kvmppc_handle_loads(run, vcpu, rt, 2, 1);
break;
case OP_31_XOP_LHZX:
- rt = get_rt(inst);
emulated = kvmppc_handle_load(run, vcpu, rt, 2, 1);
break;
case OP_31_XOP_LHZUX:
- rt = get_rt(inst);
- ra = get_ra(inst);
- rb = get_rb(inst);
-
emulated = kvmppc_handle_load(run, vcpu, rt, 2, 1);
kvmppc_set_gpr(vcpu, ra, vcpu->arch.vaddr_accessed);
break;
case OP_31_XOP_MFSPR:
- sprn = get_sprn(inst);
- rt = get_rt(inst);
-
switch (sprn) {
case SPRN_SRR0:
- kvmppc_set_gpr(vcpu, rt, vcpu->arch.shared->srr0);
+ spr_val = vcpu->arch.shared->srr0;
break;
case SPRN_SRR1:
- kvmppc_set_gpr(vcpu, rt, vcpu->arch.shared->srr1);
+ spr_val = vcpu->arch.shared->srr1;
break;
case SPRN_PVR:
- kvmppc_set_gpr(vcpu, rt, vcpu->arch.pvr); break;
+ spr_val = vcpu->arch.pvr;
+ break;
case SPRN_PIR:
- kvmppc_set_gpr(vcpu, rt, vcpu->vcpu_id); break;
+ spr_val = vcpu->vcpu_id;
+ break;
case SPRN_MSSSR0:
- kvmppc_set_gpr(vcpu, rt, 0); break;
+ spr_val = 0;
+ break;
/* Note: mftb and TBRL/TBWL are user-accessible, so
* the guest can always access the real TB anyways.
* In fact, we probably will never see these traps. */
case SPRN_TBWL:
- kvmppc_set_gpr(vcpu, rt, get_tb() >> 32); break;
+ spr_val = get_tb() >> 32;
+ break;
case SPRN_TBWU:
- kvmppc_set_gpr(vcpu, rt, get_tb()); break;
+ spr_val = get_tb();
+ break;
case SPRN_SPRG0:
- kvmppc_set_gpr(vcpu, rt, vcpu->arch.shared->sprg0);
+ spr_val = vcpu->arch.shared->sprg0;
break;
case SPRN_SPRG1:
- kvmppc_set_gpr(vcpu, rt, vcpu->arch.shared->sprg1);
+ spr_val = vcpu->arch.shared->sprg1;
break;
case SPRN_SPRG2:
- kvmppc_set_gpr(vcpu, rt, vcpu->arch.shared->sprg2);
+ spr_val = vcpu->arch.shared->sprg2;
break;
case SPRN_SPRG3:
- kvmppc_set_gpr(vcpu, rt, vcpu->arch.shared->sprg3);
+ spr_val = vcpu->arch.shared->sprg3;
break;
/* Note: SPRG4-7 are user-readable, so we don't get
* a trap. */
case SPRN_DEC:
- {
- kvmppc_set_gpr(vcpu, rt,
- kvmppc_get_dec(vcpu, get_tb()));
+ spr_val = kvmppc_get_dec(vcpu, get_tb());
break;
- }
default:
- emulated = kvmppc_core_emulate_mfspr(vcpu, sprn, rt);
- if (emulated == EMULATE_FAIL) {
- printk("mfspr: unknown spr %x\n", sprn);
- kvmppc_set_gpr(vcpu, rt, 0);
+ emulated = kvmppc_core_emulate_mfspr(vcpu, sprn,
+ &spr_val);
+ if (unlikely(emulated == EMULATE_FAIL)) {
+ printk(KERN_INFO "mfspr: unknown spr "
+ "0x%x\n", sprn);
}
break;
}
+ kvmppc_set_gpr(vcpu, rt, spr_val);
kvmppc_set_exit_type(vcpu, EMULATED_MFSPR_EXITS);
break;
case OP_31_XOP_STHX:
- rs = get_rs(inst);
- ra = get_ra(inst);
- rb = get_rb(inst);
-
emulated = kvmppc_handle_store(run, vcpu,
kvmppc_get_gpr(vcpu, rs),
2, 1);
break;
case OP_31_XOP_STHUX:
- rs = get_rs(inst);
- ra = get_ra(inst);
- rb = get_rb(inst);
-
emulated = kvmppc_handle_store(run, vcpu,
kvmppc_get_gpr(vcpu, rs),
2, 1);
@@ -326,14 +306,13 @@ int kvmppc_emulate_instruction(struct kvm_run *run, struct kvm_vcpu *vcpu)
break;
case OP_31_XOP_MTSPR:
- sprn = get_sprn(inst);
- rs = get_rs(inst);
+ spr_val = kvmppc_get_gpr(vcpu, rs);
switch (sprn) {
case SPRN_SRR0:
- vcpu->arch.shared->srr0 = kvmppc_get_gpr(vcpu, rs);
+ vcpu->arch.shared->srr0 = spr_val;
break;
case SPRN_SRR1:
- vcpu->arch.shared->srr1 = kvmppc_get_gpr(vcpu, rs);
+ vcpu->arch.shared->srr1 = spr_val;
break;
/* XXX We need to context-switch the timebase for
@@ -344,27 +323,29 @@ int kvmppc_emulate_instruction(struct kvm_run *run, struct kvm_vcpu *vcpu)
case SPRN_MSSSR0: break;
case SPRN_DEC:
- vcpu->arch.dec = kvmppc_get_gpr(vcpu, rs);
+ vcpu->arch.dec = spr_val;
kvmppc_emulate_dec(vcpu);
break;
case SPRN_SPRG0:
- vcpu->arch.shared->sprg0 = kvmppc_get_gpr(vcpu, rs);
+ vcpu->arch.shared->sprg0 = spr_val;
break;
case SPRN_SPRG1:
- vcpu->arch.shared->sprg1 = kvmppc_get_gpr(vcpu, rs);
+ vcpu->arch.shared->sprg1 = spr_val;
break;
case SPRN_SPRG2:
- vcpu->arch.shared->sprg2 = kvmppc_get_gpr(vcpu, rs);
+ vcpu->arch.shared->sprg2 = spr_val;
break;
case SPRN_SPRG3:
- vcpu->arch.shared->sprg3 = kvmppc_get_gpr(vcpu, rs);
+ vcpu->arch.shared->sprg3 = spr_val;
break;
default:
- emulated = kvmppc_core_emulate_mtspr(vcpu, sprn, rs);
+ emulated = kvmppc_core_emulate_mtspr(vcpu, sprn,
+ spr_val);
if (emulated == EMULATE_FAIL)
- printk("mtspr: unknown spr %x\n", sprn);
+ printk(KERN_INFO "mtspr: unknown spr "
+ "0x%x\n", sprn);
break;
}
kvmppc_set_exit_type(vcpu, EMULATED_MTSPR_EXITS);
@@ -379,7 +360,6 @@ int kvmppc_emulate_instruction(struct kvm_run *run, struct kvm_vcpu *vcpu)
break;
case OP_31_XOP_LWBRX:
- rt = get_rt(inst);
emulated = kvmppc_handle_load(run, vcpu, rt, 4, 0);
break;
@@ -387,25 +367,16 @@ int kvmppc_emulate_instruction(struct kvm_run *run, struct kvm_vcpu *vcpu)
break;
case OP_31_XOP_STWBRX:
- rs = get_rs(inst);
- ra = get_ra(inst);
- rb = get_rb(inst);
-
emulated = kvmppc_handle_store(run, vcpu,
kvmppc_get_gpr(vcpu, rs),
4, 0);
break;
case OP_31_XOP_LHBRX:
- rt = get_rt(inst);
emulated = kvmppc_handle_load(run, vcpu, rt, 2, 0);
break;
case OP_31_XOP_STHBRX:
- rs = get_rs(inst);
- ra = get_ra(inst);
- rb = get_rb(inst);
-
emulated = kvmppc_handle_store(run, vcpu,
kvmppc_get_gpr(vcpu, rs),
2, 0);
@@ -418,39 +389,30 @@ int kvmppc_emulate_instruction(struct kvm_run *run, struct kvm_vcpu *vcpu)
break;
case OP_LWZ:
- rt = get_rt(inst);
emulated = kvmppc_handle_load(run, vcpu, rt, 4, 1);
break;
case OP_LWZU:
- ra = get_ra(inst);
- rt = get_rt(inst);
emulated = kvmppc_handle_load(run, vcpu, rt, 4, 1);
kvmppc_set_gpr(vcpu, ra, vcpu->arch.vaddr_accessed);
break;
case OP_LBZ:
- rt = get_rt(inst);
emulated = kvmppc_handle_load(run, vcpu, rt, 1, 1);
break;
case OP_LBZU:
- ra = get_ra(inst);
- rt = get_rt(inst);
emulated = kvmppc_handle_load(run, vcpu, rt, 1, 1);
kvmppc_set_gpr(vcpu, ra, vcpu->arch.vaddr_accessed);
break;
case OP_STW:
- rs = get_rs(inst);
emulated = kvmppc_handle_store(run, vcpu,
kvmppc_get_gpr(vcpu, rs),
4, 1);
break;
case OP_STWU:
- ra = get_ra(inst);
- rs = get_rs(inst);
emulated = kvmppc_handle_store(run, vcpu,
kvmppc_get_gpr(vcpu, rs),
4, 1);
@@ -458,15 +420,12 @@ int kvmppc_emulate_instruction(struct kvm_run *run, struct kvm_vcpu *vcpu)
break;
case OP_STB:
- rs = get_rs(inst);
emulated = kvmppc_handle_store(run, vcpu,
kvmppc_get_gpr(vcpu, rs),
1, 1);
break;
case OP_STBU:
- ra = get_ra(inst);
- rs = get_rs(inst);
emulated = kvmppc_handle_store(run, vcpu,
kvmppc_get_gpr(vcpu, rs),
1, 1);
@@ -474,39 +433,30 @@ int kvmppc_emulate_instruction(struct kvm_run *run, struct kvm_vcpu *vcpu)
break;
case OP_LHZ:
- rt = get_rt(inst);
emulated = kvmppc_handle_load(run, vcpu, rt, 2, 1);
break;
case OP_LHZU:
- ra = get_ra(inst);
- rt = get_rt(inst);
emulated = kvmppc_handle_load(run, vcpu, rt, 2, 1);
kvmppc_set_gpr(vcpu, ra, vcpu->arch.vaddr_accessed);
break;
case OP_LHA:
- rt = get_rt(inst);
emulated = kvmppc_handle_loads(run, vcpu, rt, 2, 1);
break;
case OP_LHAU:
- ra = get_ra(inst);
- rt = get_rt(inst);
emulated = kvmppc_handle_loads(run, vcpu, rt, 2, 1);
kvmppc_set_gpr(vcpu, ra, vcpu->arch.vaddr_accessed);
break;
case OP_STH:
- rs = get_rs(inst);
emulated = kvmppc_handle_store(run, vcpu,
kvmppc_get_gpr(vcpu, rs),
2, 1);
break;
case OP_STHU:
- ra = get_ra(inst);
- rs = get_rs(inst);
emulated = kvmppc_handle_store(run, vcpu,
kvmppc_get_gpr(vcpu, rs),
2, 1);
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