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>
diff --git a/drivers/kvm/mmu.c b/drivers/kvm/mmu.c
index d81b9cd..376800a 100644
--- a/drivers/kvm/mmu.c
+++ b/drivers/kvm/mmu.c
@@ -1314,6 +1314,23 @@
}
}
+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;