forked from Minki/linux
kvm: x86: Introduce KVM_REQ_LOAD_CR3
The KVM_REQ_LOAD_CR3 request loads the hardware CR3 using the current root_hpa. Signed-off-by: Junaid Shahid <junaids@google.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
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@ -54,6 +54,7 @@
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#define KVM_REQ_TRIPLE_FAULT KVM_ARCH_REQ(2)
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#define KVM_REQ_MMU_SYNC KVM_ARCH_REQ(3)
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#define KVM_REQ_CLOCK_UPDATE KVM_ARCH_REQ(4)
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#define KVM_REQ_LOAD_CR3 KVM_ARCH_REQ(5)
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#define KVM_REQ_EVENT KVM_ARCH_REQ(6)
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#define KVM_REQ_APF_HALT KVM_ARCH_REQ(7)
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#define KVM_REQ_STEAL_UPDATE KVM_ARCH_REQ(8)
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@ -4847,8 +4847,7 @@ int kvm_mmu_load(struct kvm_vcpu *vcpu)
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kvm_mmu_sync_roots(vcpu);
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if (r)
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goto out;
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/* set_cr3() should ensure TLB has been flushed */
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vcpu->arch.mmu.set_cr3(vcpu, vcpu->arch.mmu.root_hpa);
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kvm_mmu_load_cr3(vcpu);
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out:
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return r;
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}
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@ -85,6 +85,13 @@ static inline int kvm_mmu_reload(struct kvm_vcpu *vcpu)
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return kvm_mmu_load(vcpu);
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}
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static inline void kvm_mmu_load_cr3(struct kvm_vcpu *vcpu)
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{
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/* set_cr3() should ensure TLB has been flushed */
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if (VALID_PAGE(vcpu->arch.mmu.root_hpa))
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vcpu->arch.mmu.set_cr3(vcpu, vcpu->arch.mmu.root_hpa);
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}
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/*
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* Currently, we have two sorts of write-protection, a) the first one
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* write-protects guest page to sync the guest modification, b) another one is
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@ -7332,6 +7332,8 @@ static int vcpu_enter_guest(struct kvm_vcpu *vcpu)
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}
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if (kvm_check_request(KVM_REQ_MMU_SYNC, vcpu))
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kvm_mmu_sync_roots(vcpu);
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if (kvm_check_request(KVM_REQ_LOAD_CR3, vcpu))
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kvm_mmu_load_cr3(vcpu);
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if (kvm_check_request(KVM_REQ_TLB_FLUSH, vcpu))
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kvm_vcpu_flush_tlb(vcpu, true);
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if (kvm_check_request(KVM_REQ_REPORT_TPR_ACCESS, vcpu)) {
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