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KVM: PPC: BOOK3S: PR: Emulate instruction counter

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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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4
arch/powerpc/kvm/book3s_pr.c
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@@ -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: