diff options
| author | Joerg Roedel <joerg.roedel@amd.com> | 2008-04-09 14:15:30 +0200 |
|---|---|---|
| committer | Avi Kivity <avi@qumranet.com> | 2008-04-27 12:01:18 +0300 |
| commit | 53371b5098543ab09dcb0c7ce31da887dbe58c62 (patch) | |
| tree | 5453a27cb8909c3604f81d4cc8811542b3f48d10 | |
| parent | 6394b6494c0a352a2db3ea3e891ba7aeea7c1441 (diff) | |
KVM: SVM: add intercept for machine check exception
To properly forward a MCE occured while the guest is running to the host, we
have to intercept this exception and call the host handler by hand. This is
implemented by this patch.
Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
Signed-off-by: Avi Kivity <avi@qumranet.com>
| -rw-r--r-- | arch/x86/kvm/svm.c | 17 | ||||
| -rw-r--r-- | include/asm-x86/kvm_host.h | 1 |
2 files changed, 17 insertions, 1 deletions
diff --git a/arch/x86/kvm/svm.c b/arch/x86/kvm/svm.c index 8af463b9152..da3ddef4760 100644 --- a/arch/x86/kvm/svm.c +++ b/arch/x86/kvm/svm.c @@ -507,7 +507,8 @@ static void init_vmcb(struct vcpu_svm *svm) INTERCEPT_DR7_MASK; control->intercept_exceptions = (1 << PF_VECTOR) | - (1 << UD_VECTOR); + (1 << UD_VECTOR) | + (1 << MC_VECTOR); control->intercept = (1ULL << INTERCEPT_INTR) | @@ -1044,6 +1045,19 @@ static int nm_interception(struct vcpu_svm *svm, struct kvm_run *kvm_run) return 1; } +static int mc_interception(struct vcpu_svm *svm, struct kvm_run *kvm_run) +{ + /* + * On an #MC intercept the MCE handler is not called automatically in + * the host. So do it by hand here. + */ + asm volatile ( + "int $0x12\n"); + /* not sure if we ever come back to this point */ + + return 1; +} + static int shutdown_interception(struct vcpu_svm *svm, struct kvm_run *kvm_run) { /* @@ -1367,6 +1381,7 @@ static int (*svm_exit_handlers[])(struct vcpu_svm *svm, [SVM_EXIT_EXCP_BASE + UD_VECTOR] = ud_interception, [SVM_EXIT_EXCP_BASE + PF_VECTOR] = pf_interception, [SVM_EXIT_EXCP_BASE + NM_VECTOR] = nm_interception, + [SVM_EXIT_EXCP_BASE + MC_VECTOR] = mc_interception, [SVM_EXIT_INTR] = nop_on_interception, [SVM_EXIT_NMI] = nop_on_interception, [SVM_EXIT_SMI] = nop_on_interception, diff --git a/include/asm-x86/kvm_host.h b/include/asm-x86/kvm_host.h index de3eccfb767..286117878ce 100644 --- a/include/asm-x86/kvm_host.h +++ b/include/asm-x86/kvm_host.h @@ -62,6 +62,7 @@ #define SS_VECTOR 12 #define GP_VECTOR 13 #define PF_VECTOR 14 +#define MC_VECTOR 18 #define SELECTOR_TI_MASK (1 << 2) #define SELECTOR_RPL_MASK 0x03 |