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| author | Nadav Har'El <nyh@il.ibm.com> | 2011-05-26 00:13:36 +0400 |
|---|---|---|
| committer | Avi Kivity <avi@redhat.com> | 2011-07-12 12:45:17 +0400 |
| commit | 0b6ac343fc8e120b7d32fd2d51a8f81354086fa0 (patch) | |
| tree | 7f5605a9a68c32458e6e744847813277e62fb9c5 /arch/x86/kvm/vmx.c | |
| parent | b6f1250edb4462e38d72c7f6cce35911df21d31b (diff) | |
| download | linux-0b6ac343fc8e120b7d32fd2d51a8f81354086fa0.tar.xz | |
KVM: nVMX: Correct handling of exception injection
Similar to the previous patch, but concerning injection of exceptions rather
than external interrupts.
Signed-off-by: Nadav Har'El <nyh@il.ibm.com>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
Diffstat (limited to 'arch/x86/kvm/vmx.c')
| -rw-r--r-- | arch/x86/kvm/vmx.c | 26 |
1 files changed, 26 insertions, 0 deletions
diff --git a/arch/x86/kvm/vmx.c b/arch/x86/kvm/vmx.c index ab218da8b956..9604af7675e8 100644 --- a/arch/x86/kvm/vmx.c +++ b/arch/x86/kvm/vmx.c @@ -1585,6 +1585,25 @@ static void vmx_clear_hlt(struct kvm_vcpu *vcpu) vmcs_write32(GUEST_ACTIVITY_STATE, GUEST_ACTIVITY_ACTIVE); } +/* + * KVM wants to inject page-faults which it got to the guest. This function + * checks whether in a nested guest, we need to inject them to L1 or L2. + * This function assumes it is called with the exit reason in vmcs02 being + * a #PF exception (this is the only case in which KVM injects a #PF when L2 + * is running). + */ +static int nested_pf_handled(struct kvm_vcpu *vcpu) +{ + struct vmcs12 *vmcs12 = get_vmcs12(vcpu); + + /* TODO: also check PFEC_MATCH/MASK, not just EB.PF. */ + if (!(vmcs12->exception_bitmap & PF_VECTOR)) + return 0; + + nested_vmx_vmexit(vcpu); + return 1; +} + static void vmx_queue_exception(struct kvm_vcpu *vcpu, unsigned nr, bool has_error_code, u32 error_code, bool reinject) @@ -1592,6 +1611,10 @@ static void vmx_queue_exception(struct kvm_vcpu *vcpu, unsigned nr, struct vcpu_vmx *vmx = to_vmx(vcpu); u32 intr_info = nr | INTR_INFO_VALID_MASK; + if (nr == PF_VECTOR && is_guest_mode(vcpu) && + nested_pf_handled(vcpu)) + return; + if (has_error_code) { vmcs_write32(VM_ENTRY_EXCEPTION_ERROR_CODE, error_code); intr_info |= INTR_INFO_DELIVER_CODE_MASK; @@ -3820,6 +3843,9 @@ static void vmx_inject_nmi(struct kvm_vcpu *vcpu) { struct vcpu_vmx *vmx = to_vmx(vcpu); + if (is_guest_mode(vcpu)) + return; + if (!cpu_has_virtual_nmis()) { /* * Tracking the NMI-blocked state in software is built upon |