diff options
| author | Marcelo Tosatti <mtosatti@redhat.com> | 2008-02-20 14:47:24 -0500 |
|---|---|---|
| committer | Avi Kivity <avi@qumranet.com> | 2008-04-27 11:53:25 +0300 |
| commit | 2e53d63acba75795aa226febd140f67c58c6a353 (patch) | |
| tree | be4ad4e5b28c737053af78a950d270a657e9f628 /include | |
| parent | 847f0ad8cbfa70c1af6948025836dfbd9ed6da1e (diff) | |
| download | linux-2e53d63acba75795aa226febd140f67c58c6a353.tar.bz2 | |
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.h | 1 | ||||
| -rw-r--r-- | include/linux/kvm_host.h | 2 |
2 files changed, 3 insertions, 0 deletions
diff --git a/include/asm-x86/kvm_host.h b/include/asm-x86/kvm_host.h index 935ffa4db9f4..8c3f74b73524 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 eb88d32dd5c7..994278fb5883 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); |