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authorVitaly Kuznetsov <vkuznets@redhat.com>2020-07-08 16:00:23 +0200
committerPaolo Bonzini <pbonzini@redhat.com>2020-07-09 07:08:37 -0400
commit995decb6c43e1d6e9d6a7d590471f2eea74600f4 (patch)
treed4eae76f4d0582ab885c3d4c24685a0a59f60938 /virt
parent5668821aefcbd8511740301de8bc9153c103a43a (diff)
KVM: x86: take as_id into account when checking PGD
OVMF booted guest running on shadow pages crashes on TRIPLE FAULT after enabling paging from SMM. The crash is triggered from mmu_check_root() and is caused by kvm_is_visible_gfn() searching through memslots with as_id = 0 while vCPU may be in a different context (address space). Introduce kvm_vcpu_is_visible_gfn() and use it from mmu_check_root(). Signed-off-by: Vitaly Kuznetsov <vkuznets@redhat.com> Message-Id: <20200708140023.1476020-1-vkuznets@redhat.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Diffstat (limited to 'virt')
-rw-r--r--virt/kvm/kvm_main.c8
1 files changed, 8 insertions, 0 deletions
diff --git a/virt/kvm/kvm_main.c b/virt/kvm/kvm_main.c
index 0a68c9d3d3ab..b528a59b0a84 100644
--- a/virt/kvm/kvm_main.c
+++ b/virt/kvm/kvm_main.c
@@ -1626,6 +1626,14 @@ bool kvm_is_visible_gfn(struct kvm *kvm, gfn_t gfn)
}
EXPORT_SYMBOL_GPL(kvm_is_visible_gfn);
+bool kvm_vcpu_is_visible_gfn(struct kvm_vcpu *vcpu, gfn_t gfn)
+{
+ struct kvm_memory_slot *memslot = kvm_vcpu_gfn_to_memslot(vcpu, gfn);
+
+ return kvm_is_visible_memslot(memslot);
+}
+EXPORT_SYMBOL_GPL(kvm_vcpu_is_visible_gfn);
+
unsigned long kvm_host_page_size(struct kvm_vcpu *vcpu, gfn_t gfn)
{
struct vm_area_struct *vma;

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