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| author | Jim Mattson <jmattson@google.com> | 2018-10-16 14:29:22 -0700 |
|---|---|---|
| committer | Paolo Bonzini <pbonzini@redhat.com> | 2018-10-17 19:07:43 +0200 |
| commit | da998b46d244767505e41d050dcac5e4d03ba96f (patch) | |
| tree | 8e719071b6732577b306b04dfb6fe886a244e51f /arch/x86/kvm/x86.h | |
| parent | 91e86d225ef3da80d33a8fd7695316c31c0810c9 (diff) | |
| download | linux-stable-da998b46d244767505e41d050dcac5e4d03ba96f.tar.gz linux-stable-da998b46d244767505e41d050dcac5e4d03ba96f.tar.bz2 linux-stable-da998b46d244767505e41d050dcac5e4d03ba96f.zip | |
kvm: x86: Defer setting of CR2 until #PF delivery
When exception payloads are enabled by userspace (which is not yet
possible) and a #PF is raised in L2, defer the setting of CR2 until
the #PF is delivered. This allows the L1 hypervisor to intercept the
fault before CR2 is modified.
For backwards compatibility, when exception payloads are not enabled
by userspace, kvm_multiple_exception modifies CR2 when the #PF
exception is raised.
Reported-by: Jim Mattson <jmattson@google.com>
Suggested-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Jim Mattson <jmattson@google.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Diffstat (limited to 'arch/x86/kvm/x86.h')
| -rw-r--r-- | arch/x86/kvm/x86.h | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/arch/x86/kvm/x86.h b/arch/x86/kvm/x86.h index 67b9568613f3..224cd0a47568 100644 --- a/arch/x86/kvm/x86.h +++ b/arch/x86/kvm/x86.h @@ -266,6 +266,8 @@ int kvm_write_guest_virt_system(struct kvm_vcpu *vcpu, int handle_ud(struct kvm_vcpu *vcpu); +void kvm_deliver_exception_payload(struct kvm_vcpu *vcpu); + void kvm_vcpu_mtrr_init(struct kvm_vcpu *vcpu); u8 kvm_mtrr_get_guest_memory_type(struct kvm_vcpu *vcpu, gfn_t gfn); bool kvm_mtrr_valid(struct kvm_vcpu *vcpu, u32 msr, u64 data); |