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KVM: PPC: BOOK3S: PR: Emulate instruction counter 

Writing to IC is not allowed in the privileged mode.

Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
Signed-off-by: Alexander Graf <agraf@suse.de>
This commit is contained in:
Aneesh Kumar K.V 2014-06-05 17:38:05 +05:30 committed by Alexander Graf
parent 8f42ab2749
commit 06da28e76b
5 changed files with 14 additions and 6 deletions
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1
arch/powerpc/include/asm/kvm_host.h
View File

@ -506,6 +506,7 @@ struct kvm_vcpu_arch {
/* Time base value when we entered the guest */
u64 entry_tb;
u64 entry_vtb;
u64 entry_ic;
u32 tcr;
ulong tsr; /* we need to perform set/clr_bits() which requires ulong */
u32 ivor[64];

6
arch/powerpc/kvm/book3s.c
View File

@ -649,6 +649,9 @@ int kvm_vcpu_ioctl_get_one_reg(struct kvm_vcpu *vcpu, struct kvm_one_reg *reg)
case KVM_REG_PPC_VTB:
val = get_reg_val(reg->id, vcpu->arch.vtb);
break;
case KVM_REG_PPC_IC:
val = get_reg_val(reg->id, vcpu->arch.ic);
break;
default:
r = -EINVAL;
break;
@ -756,6 +759,9 @@ int kvm_vcpu_ioctl_set_one_reg(struct kvm_vcpu *vcpu, struct kvm_one_reg *reg)
case KVM_REG_PPC_VTB:
vcpu->arch.vtb = set_reg_val(reg->id, val);
break;
case KVM_REG_PPC_IC:
vcpu->arch.ic = set_reg_val(reg->id, val);
break;
default:
r = -EINVAL;
break;

3
arch/powerpc/kvm/book3s_emulate.c
View File

@ -580,6 +580,9 @@ int kvmppc_core_emulate_mfspr_pr(struct kvm_vcpu *vcpu, int sprn, ulong *spr_val
case SPRN_VTB:
*spr_val = vcpu->arch.vtb;
break;
case SPRN_IC:
*spr_val = vcpu->arch.ic;
break;
case SPRN_GQR0:
case SPRN_GQR1:
case SPRN_GQR2:

6
arch/powerpc/kvm/book3s_hv.c
View File

@ -894,9 +894,6 @@ static int kvmppc_get_one_reg_hv(struct kvm_vcpu *vcpu, u64 id,
case KVM_REG_PPC_CIABR:
*val = get_reg_val(id, vcpu->arch.ciabr);
break;
case KVM_REG_PPC_IC:
*val = get_reg_val(id, vcpu->arch.ic);
break;
case KVM_REG_PPC_CSIGR:
*val = get_reg_val(id, vcpu->arch.csigr);
break;
@ -1091,9 +1088,6 @@ static int kvmppc_set_one_reg_hv(struct kvm_vcpu *vcpu, u64 id,
if ((vcpu->arch.ciabr & CIABR_PRIV) == CIABR_PRIV_HYPER)
vcpu->arch.ciabr &= ~CIABR_PRIV; /* disable */
break;
case KVM_REG_PPC_IC:
vcpu->arch.ic = set_reg_val(id, *val);
break;
case KVM_REG_PPC_CSIGR:
vcpu->arch.csigr = set_reg_val(id, *val);
break;

4
arch/powerpc/kvm/book3s_pr.c
View File

@ -126,6 +126,8 @@ void kvmppc_copy_to_svcpu(struct kvmppc_book3s_shadow_vcpu *svcpu,
*/
vcpu->arch.entry_tb = get_tb();
vcpu->arch.entry_vtb = get_vtb();
if (cpu_has_feature(CPU_FTR_ARCH_207S))
vcpu->arch.entry_ic = mfspr(SPRN_IC);
svcpu->in_use = true;
}
@ -178,6 +180,8 @@ void kvmppc_copy_from_svcpu(struct kvm_vcpu *vcpu,
vcpu->arch.purr += get_tb() - vcpu->arch.entry_tb;
vcpu->arch.spurr += get_tb() - vcpu->arch.entry_tb;
vcpu->arch.vtb += get_vtb() - vcpu->arch.entry_vtb;
if (cpu_has_feature(CPU_FTR_ARCH_207S))
vcpu->arch.ic += mfspr(SPRN_IC) - vcpu->arch.entry_ic;
svcpu->in_use = false;
out: