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authorAlexander Graf <agraf@suse.de>2010-08-02 16:08:22 +0200
committerAvi Kivity <avi@redhat.com>2010-10-24 10:52:05 +0200
commit4cb6b7ea0cd085e6613153ad69608cad6421abcc (patch)
tree79c5eae68895c2ac75e09846f44782dd347a0cdd /arch/powerpc
parentc60b4cf70127941e2f944a7971a7f6b3ecb367ac (diff)
KVM: PPC: Preload magic page when in kernel mode
When the guest jumps into kernel mode and has the magic page mapped, theres a very high chance that it will also use it. So let's detect that scenario and map the segment accordingly. Signed-off-by: Alexander Graf <agraf@suse.de>
Diffstat (limited to 'arch/powerpc')
-rw-r--r--arch/powerpc/kvm/book3s.c10
1 files changed, 10 insertions, 0 deletions
diff --git a/arch/powerpc/kvm/book3s.c b/arch/powerpc/kvm/book3s.c
index 37db61d37041..54ca578239db 100644
--- a/arch/powerpc/kvm/book3s.c
+++ b/arch/powerpc/kvm/book3s.c
@@ -145,6 +145,16 @@ void kvmppc_set_msr(struct kvm_vcpu *vcpu, u64 msr)
(old_msr & (MSR_PR|MSR_IR|MSR_DR))) {
kvmppc_mmu_flush_segments(vcpu);
kvmppc_mmu_map_segment(vcpu, kvmppc_get_pc(vcpu));
+
+ /* Preload magic page segment when in kernel mode */
+ if (!(msr & MSR_PR) && vcpu->arch.magic_page_pa) {
+ struct kvm_vcpu_arch *a = &vcpu->arch;
+
+ if (msr & MSR_DR)
+ kvmppc_mmu_map_segment(vcpu, a->magic_page_ea);
+ else
+ kvmppc_mmu_map_segment(vcpu, a->magic_page_pa);
+ }
}
/* Preload FPU if it's enabled */