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authorMarcelo Tosatti <mtosatti@redhat.com>2008-02-20 14:47:24 -0500
committerAvi Kivity <avi@qumranet.com>2008-04-27 11:53:25 +0300
commit2e53d63acba75795aa226febd140f67c58c6a353 (patch)
treebe4ad4e5b28c737053af78a950d270a657e9f628 /include
parent847f0ad8cbfa70c1af6948025836dfbd9ed6da1e (diff)
KVM: MMU: ignore zapped root pagetables
Mark zapped root pagetables as invalid and ignore such pages during lookup. This is a problem with the cr3-target feature, where a zapped root table fools the faulting code into creating a read-only mapping. The result is a lockup if the instruction can't be emulated. Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com> Cc: Anthony Liguori <aliguori@us.ibm.com> Signed-off-by: Avi Kivity <avi@qumranet.com>
Diffstat (limited to 'include')
-rw-r--r--include/asm-x86/kvm_host.h1
-rw-r--r--include/linux/kvm_host.h2
2 files changed, 3 insertions, 0 deletions
diff --git a/include/asm-x86/kvm_host.h b/include/asm-x86/kvm_host.h
index 935ffa4db9f..8c3f74b7352 100644
--- a/include/asm-x86/kvm_host.h
+++ b/include/asm-x86/kvm_host.h
@@ -141,6 +141,7 @@ union kvm_mmu_page_role {
unsigned pad_for_nice_hex_output:6;
unsigned metaphysical:1;
unsigned access:3;
+ unsigned invalid:1;
};
};
diff --git a/include/linux/kvm_host.h b/include/linux/kvm_host.h
index eb88d32dd5c..994278fb588 100644
--- a/include/linux/kvm_host.h
+++ b/include/linux/kvm_host.h
@@ -37,6 +37,7 @@
#define KVM_REQ_TLB_FLUSH 0
#define KVM_REQ_MIGRATE_TIMER 1
#define KVM_REQ_REPORT_TPR_ACCESS 2
+#define KVM_REQ_MMU_RELOAD 3
struct kvm_vcpu;
extern struct kmem_cache *kvm_vcpu_cache;
@@ -190,6 +191,7 @@ void kvm_resched(struct kvm_vcpu *vcpu);
void kvm_load_guest_fpu(struct kvm_vcpu *vcpu);
void kvm_put_guest_fpu(struct kvm_vcpu *vcpu);
void kvm_flush_remote_tlbs(struct kvm *kvm);
+void kvm_reload_remote_mmus(struct kvm *kvm);
long kvm_arch_dev_ioctl(struct file *filp,
unsigned int ioctl, unsigned long arg);