From e0fa826f969c262c23908953bf85add487cc2e6c Mon Sep 17 00:00:00 2001 From: Dor Laor Date: Fri, 30 Mar 2007 13:06:33 +0300 Subject: [PATCH] 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 Signed-off-by: Avi Kivity --- drivers/kvm/kvm.h | 1 + drivers/kvm/mmu.c | 17 +++++++++++++++++ 2 files changed, 18 insertions(+) diff --git a/drivers/kvm/kvm.h b/drivers/kvm/kvm.h index 6d0bd7aab9..59357bea5b 100644 --- a/drivers/kvm/kvm.h +++ b/drivers/kvm/kvm.h @@ -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) diff --git a/drivers/kvm/mmu.c b/drivers/kvm/mmu.c index d81b9cd346..376800a339 100644 --- a/drivers/kvm/mmu.c +++ b/drivers/kvm/mmu.c @@ -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; -- 2.20.1