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KVM: Add mmu cache clear function
Functions that play around with the physical memory map need a way to clear mappings to possibly nonexistent or invalid memory. Both the mmu cache and the processor tlb are cleared. Signed-off-by: Dor Laor <dor.laor@qumranet.com> Signed-off-by: Avi Kivity <avi@qumranet.com>
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2 changed files with 18 additions and 0 deletions
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@ -430,6 +430,7 @@ int kvm_mmu_setup(struct kvm_vcpu *vcpu);
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int kvm_mmu_reset_context(struct kvm_vcpu *vcpu);
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void kvm_mmu_slot_remove_write_access(struct kvm_vcpu *vcpu, int slot);
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void kvm_mmu_zap_all(struct kvm_vcpu *vcpu);
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hpa_t gpa_to_hpa(struct kvm_vcpu *vcpu, gpa_t gpa);
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#define HPA_MSB ((sizeof(hpa_t) * 8) - 1)
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@ -1314,6 +1314,23 @@ void kvm_mmu_slot_remove_write_access(struct kvm_vcpu *vcpu, int slot)
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}
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}
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void kvm_mmu_zap_all(struct kvm_vcpu *vcpu)
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{
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destroy_kvm_mmu(vcpu);
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while (!list_empty(&vcpu->kvm->active_mmu_pages)) {
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struct kvm_mmu_page *page;
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page = container_of(vcpu->kvm->active_mmu_pages.next,
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struct kvm_mmu_page, link);
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kvm_mmu_zap_page(vcpu, page);
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}
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mmu_free_memory_caches(vcpu);
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kvm_arch_ops->tlb_flush(vcpu);
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init_kvm_mmu(vcpu);
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}
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#ifdef AUDIT
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static const char *audit_msg;
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