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KVM: PPC: Don't flush PTEs on NX/RO hit
When hitting a no-execute or read-only data/inst storage interrupt we were flushing the respective PTE so we're sure it gets properly overwritten next. According to the spec, this is unnecessary though. The guest issues a tlbie anyways, so we're safe to just keep the PTE around and have it manually removed from the guest, saving us a flush. Signed-off-by: Alexander Graf <agraf@suse.de>
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1 changed files with 0 additions and 2 deletions
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@ -887,7 +887,6 @@ int kvmppc_handle_exit(struct kvm_run *run, struct kvm_vcpu *vcpu,
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vcpu->arch.shared->msr |=
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to_svcpu(vcpu)->shadow_srr1 & 0x58000000;
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kvmppc_book3s_queue_irqprio(vcpu, exit_nr);
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kvmppc_mmu_pte_flush(vcpu, kvmppc_get_pc(vcpu), ~0xFFFUL);
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r = RESUME_GUEST;
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}
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break;
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@ -913,7 +912,6 @@ int kvmppc_handle_exit(struct kvm_run *run, struct kvm_vcpu *vcpu,
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vcpu->arch.shared->dar = dar;
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vcpu->arch.shared->dsisr = to_svcpu(vcpu)->fault_dsisr;
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kvmppc_book3s_queue_irqprio(vcpu, exit_nr);
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kvmppc_mmu_pte_flush(vcpu, dar, ~0xFFFUL);
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r = RESUME_GUEST;
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}
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break;
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