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| author | Alexander Graf <agraf@suse.de> | 2012-02-20 15:33:22 +0400 |
|---|---|---|
| committer | Avi Kivity <avi@redhat.com> | 2012-04-08 13:55:19 +0400 |
| commit | 0268597c811ccf55e0bda20907c1a9e6001365cf (patch) | |
| tree | ed38fdd7caba11212817214906f2c25f8fc80c1f | |
| parent | c35c9d84cf141ebf05e2e481c0faccedc4f8f7ff (diff) | |
| download | linux-0268597c811ccf55e0bda20907c1a9e6001365cf.tar.xz | |
KVM: PPC: booke: add GS documentation for program interrupt
The comment for program interrupts triggered when using bookehv was
misleading. Update it to mention why MSR_GS indicates that we have
to inject an interrupt into the guest again, not emulate it.
Signed-off-by: Alexander Graf <agraf@suse.de>
Signed-off-by: Avi Kivity <avi@redhat.com>
| -rw-r--r-- | arch/powerpc/kvm/booke.c | 10 |
1 files changed, 8 insertions, 2 deletions
diff --git a/arch/powerpc/kvm/booke.c b/arch/powerpc/kvm/booke.c index af02d9dbd951..7df3f3ae71d9 100644 --- a/arch/powerpc/kvm/booke.c +++ b/arch/powerpc/kvm/booke.c @@ -685,8 +685,14 @@ int kvmppc_handle_exit(struct kvm_run *run, struct kvm_vcpu *vcpu, case BOOKE_INTERRUPT_PROGRAM: if (vcpu->arch.shared->msr & (MSR_PR | MSR_GS)) { - /* Program traps generated by user-level software must be handled - * by the guest kernel. */ + /* + * Program traps generated by user-level software must + * be handled by the guest kernel. + * + * In GS mode, hypervisor privileged instructions trap + * on BOOKE_INTERRUPT_HV_PRIV, not here, so these are + * actual program interrupts, handled by the guest. + */ kvmppc_core_queue_program(vcpu, vcpu->arch.fault_esr); r = RESUME_GUEST; kvmppc_account_exit(vcpu, USR_PR_INST); |