diff options
| author | Jim Mattson <jmattson@google.com> | 2016-12-12 11:01:37 -0800 |
|---|---|---|
| committer | Sasha Levin <alexander.levin@verizon.com> | 2017-01-12 20:56:58 -0500 |
| commit | dd5035276792edbd3dac21620d9b91d3a8e3785a (patch) | |
| tree | 8f33fbd3ca303b2c016c55ef4f97c1e273cd1a8b /arch/x86 | |
| parent | 6fdb4af13f9faf27b8ca3b25c1d3284f0be7b31b (diff) | |
kvm: nVMX: Allow L1 to intercept software exceptions (#BP and #OF)
[ Upstream commit ef85b67385436ddc1998f45f1d6a210f935b3388 ]
When L2 exits to L0 due to "exception or NMI", software exceptions
(#BP and #OF) for which L1 has requested an intercept should be
handled by L1 rather than L0. Previously, only hardware exceptions
were forwarded to L1.
Signed-off-by: Jim Mattson <jmattson@google.com>
Cc: stable@vger.kernel.org
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Sasha Levin <alexander.levin@verizon.com>
Diffstat (limited to 'arch/x86')
| -rw-r--r-- | arch/x86/kvm/vmx.c | 11 |
1 files changed, 5 insertions, 6 deletions
diff --git a/arch/x86/kvm/vmx.c b/arch/x86/kvm/vmx.c index 08f9d9230b94..341ea55d2e85 100644 --- a/arch/x86/kvm/vmx.c +++ b/arch/x86/kvm/vmx.c @@ -1172,10 +1172,10 @@ static inline bool nested_cpu_has_posted_intr(struct vmcs12 *vmcs12) return vmcs12->pin_based_vm_exec_control & PIN_BASED_POSTED_INTR; } -static inline bool is_exception(u32 intr_info) +static inline bool is_nmi(u32 intr_info) { return (intr_info & (INTR_INFO_INTR_TYPE_MASK | INTR_INFO_VALID_MASK)) - == (INTR_TYPE_HARD_EXCEPTION | INTR_INFO_VALID_MASK); + == (INTR_TYPE_NMI_INTR | INTR_INFO_VALID_MASK); } static void nested_vmx_vmexit(struct kvm_vcpu *vcpu, u32 exit_reason, @@ -5089,7 +5089,7 @@ static int handle_exception(struct kvm_vcpu *vcpu) if (is_machine_check(intr_info)) return handle_machine_check(vcpu); - if ((intr_info & INTR_INFO_INTR_TYPE_MASK) == INTR_TYPE_NMI_INTR) + if (is_nmi(intr_info)) return 1; /* already handled by vmx_vcpu_run() */ if (is_no_device(intr_info)) { @@ -7519,7 +7519,7 @@ static bool nested_vmx_exit_handled(struct kvm_vcpu *vcpu) switch (exit_reason) { case EXIT_REASON_EXCEPTION_NMI: - if (!is_exception(intr_info)) + if (is_nmi(intr_info)) return false; else if (is_page_fault(intr_info)) return enable_ept; @@ -7967,8 +7967,7 @@ static void vmx_complete_atomic_exit(struct vcpu_vmx *vmx) kvm_machine_check(); /* We need to handle NMIs before interrupts are enabled */ - if ((exit_intr_info & INTR_INFO_INTR_TYPE_MASK) == INTR_TYPE_NMI_INTR && - (exit_intr_info & INTR_INFO_VALID_MASK)) { + if (is_nmi(exit_intr_info)) { kvm_before_handle_nmi(&vmx->vcpu); asm("int $2"); kvm_after_handle_nmi(&vmx->vcpu); |