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| author | Alexander Graf <agraf@suse.de> | 2010-08-02 20:11:39 +0200 |
|---|---|---|
| committer | Avi Kivity <avi@redhat.com> | 2010-10-24 10:52:06 +0200 |
| commit | 2e602847d9c2d6b487bda62bbbe550db40ca912f (patch) | |
| tree | e93c763d86987b7aa10f87f6582eacbdee9fa792 /arch/powerpc/kvm | |
| parent | 4cb6b7ea0cd085e6613153ad69608cad6421abcc (diff) | |
| download | kernel_samsung_smdk4412-2e602847d9c2d6b487bda62bbbe550db40ca912f.zip kernel_samsung_smdk4412-2e602847d9c2d6b487bda62bbbe550db40ca912f.tar.gz kernel_samsung_smdk4412-2e602847d9c2d6b487bda62bbbe550db40ca912f.tar.bz2 | |
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>
Diffstat (limited to 'arch/powerpc/kvm')
| -rw-r--r-- | arch/powerpc/kvm/book3s.c | 2 |
1 files changed, 0 insertions, 2 deletions
diff --git a/arch/powerpc/kvm/book3s.c b/arch/powerpc/kvm/book3s.c index 54ca578..2fb528f 100644 --- a/arch/powerpc/kvm/book3s.c +++ b/arch/powerpc/kvm/book3s.c @@ -887,7 +887,6 @@ int kvmppc_handle_exit(struct kvm_run *run, struct kvm_vcpu *vcpu, vcpu->arch.shared->msr |= to_svcpu(vcpu)->shadow_srr1 & 0x58000000; kvmppc_book3s_queue_irqprio(vcpu, exit_nr); - kvmppc_mmu_pte_flush(vcpu, kvmppc_get_pc(vcpu), ~0xFFFUL); r = RESUME_GUEST; } break; @@ -913,7 +912,6 @@ int kvmppc_handle_exit(struct kvm_run *run, struct kvm_vcpu *vcpu, vcpu->arch.shared->dar = dar; vcpu->arch.shared->dsisr = to_svcpu(vcpu)->fault_dsisr; kvmppc_book3s_queue_irqprio(vcpu, exit_nr); - kvmppc_mmu_pte_flush(vcpu, dar, ~0xFFFUL); r = RESUME_GUEST; } break; |