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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>
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@ -145,6 +145,16 @@ void kvmppc_set_msr(struct kvm_vcpu *vcpu, u64 msr)
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(old_msr & (MSR_PR|MSR_IR|MSR_DR))) {
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kvmppc_mmu_flush_segments(vcpu);
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kvmppc_mmu_map_segment(vcpu, kvmppc_get_pc(vcpu));
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/* Preload magic page segment when in kernel mode */
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if (!(msr & MSR_PR) && vcpu->arch.magic_page_pa) {
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struct kvm_vcpu_arch *a = &vcpu->arch;
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if (msr & MSR_DR)
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kvmppc_mmu_map_segment(vcpu, a->magic_page_ea);
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else
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kvmppc_mmu_map_segment(vcpu, a->magic_page_pa);
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}
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}
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/* Preload FPU if it's enabled */
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