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Commit e0fa826f authored by Dor Laor's avatar Dor Laor Committed by Avi Kivity
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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: default avatarDor Laor <dor.laor@qumranet.com>
Signed-off-by: default avatarAvi Kivity <avi@qumranet.com>
parent df513e2c

drivers/kvm/kvm.h

+1 −0
Original line number Diff line number Diff line
@@ -430,6 +430,7 @@ int kvm_mmu_setup(struct kvm_vcpu *vcpu); 


int kvm_mmu_reset_context(struct kvm_vcpu *vcpu);

void kvm_mmu_slot_remove_write_access(struct kvm_vcpu *vcpu, int slot);

void kvm_mmu_zap_all(struct kvm_vcpu *vcpu);



hpa_t gpa_to_hpa(struct kvm_vcpu *vcpu, gpa_t gpa);

#define HPA_MSB ((sizeof(hpa_t) * 8) - 1)

drivers/kvm/mmu.c

+17 −0
Original line number Diff line number Diff line
@@ -1314,6 +1314,23 @@ void kvm_mmu_slot_remove_write_access(struct kvm_vcpu *vcpu, int slot) 
	}

}



void kvm_mmu_zap_all(struct kvm_vcpu *vcpu)

{

	destroy_kvm_mmu(vcpu);



	while (!list_empty(&vcpu->kvm->active_mmu_pages)) {

		struct kvm_mmu_page *page;



		page = container_of(vcpu->kvm->active_mmu_pages.next,

				    struct kvm_mmu_page, link);

		kvm_mmu_zap_page(vcpu, page);

	}



	mmu_free_memory_caches(vcpu);

	kvm_arch_ops->tlb_flush(vcpu);

	init_kvm_mmu(vcpu);

}



#ifdef AUDIT



static const char *audit_msg;