diff options
| author | Eugene Korenevsky <ekorenevsky@gmail.com> | 2014-12-16 22:35:53 +0300 |
|---|---|---|
| committer | Paolo Bonzini <pbonzini@redhat.com> | 2015-01-08 22:45:16 +0100 |
| commit | 19d5f10b3ad08f596d2682404af9a3a9030aa684 (patch) | |
| tree | 0852fe1b555324a82c49ade591e137bd15f17fb8 /arch/x86/kvm/vmx.c | |
| parent | e9ac033e6b6970c7061725fc6824b3933eb5a0e7 (diff) | |
KVM: nVMX: consult PFEC_MASK and PFEC_MATCH when generating #PF VM-exit
When generating #PF VM-exit, check equality:
(PFEC & PFEC_MASK) == PFEC_MATCH
If there is equality, the 14 bit of exception bitmap is used to take decision
about generating #PF VM-exit. If there is inequality, inverted 14 bit is used.
Signed-off-by: Eugene Korenevsky <ekorenevsky@gmail.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Diffstat (limited to 'arch/x86/kvm/vmx.c')
| -rw-r--r-- | arch/x86/kvm/vmx.c | 15 |
1 files changed, 13 insertions, 2 deletions
diff --git a/arch/x86/kvm/vmx.c b/arch/x86/kvm/vmx.c index 70bdcf946f95..e14c96e574ff 100644 --- a/arch/x86/kvm/vmx.c +++ b/arch/x86/kvm/vmx.c @@ -8206,6 +8206,18 @@ static void nested_ept_uninit_mmu_context(struct kvm_vcpu *vcpu) vcpu->arch.walk_mmu = &vcpu->arch.mmu; } +static bool nested_vmx_is_page_fault_vmexit(struct vmcs12 *vmcs12, + u16 error_code) +{ + bool inequality, bit; + + bit = (vmcs12->exception_bitmap & (1u << PF_VECTOR)) != 0; + inequality = + (error_code & vmcs12->page_fault_error_code_mask) != + vmcs12->page_fault_error_code_match; + return inequality ^ bit; +} + static void vmx_inject_page_fault_nested(struct kvm_vcpu *vcpu, struct x86_exception *fault) { @@ -8213,8 +8225,7 @@ static void vmx_inject_page_fault_nested(struct kvm_vcpu *vcpu, WARN_ON(!is_guest_mode(vcpu)); - /* TODO: also check PFEC_MATCH/MASK, not just EB.PF. */ - if (vmcs12->exception_bitmap & (1u << PF_VECTOR)) + if (nested_vmx_is_page_fault_vmexit(vmcs12, fault->error_code)) nested_vmx_vmexit(vcpu, to_vmx(vcpu)->exit_reason, vmcs_read32(VM_EXIT_INTR_INFO), vmcs_readl(EXIT_QUALIFICATION)); |