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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>
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@ -685,8 +685,14 @@ int kvmppc_handle_exit(struct kvm_run *run, struct kvm_vcpu *vcpu,
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case BOOKE_INTERRUPT_PROGRAM:
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if (vcpu->arch.shared->msr & (MSR_PR | MSR_GS)) {
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/* Program traps generated by user-level software must be handled
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* by the guest kernel. */
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/*
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* Program traps generated by user-level software must
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* be handled by the guest kernel.
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*
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* In GS mode, hypervisor privileged instructions trap
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* on BOOKE_INTERRUPT_HV_PRIV, not here, so these are
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* actual program interrupts, handled by the guest.
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*/
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kvmppc_core_queue_program(vcpu, vcpu->arch.fault_esr);
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r = RESUME_GUEST;
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kvmppc_account_exit(vcpu, USR_PR_INST);
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