diff options
| -rw-r--r-- | arch/x86/include/uapi/asm/vmx.h | 1 | ||||
| -rw-r--r-- | arch/x86/kvm/vmx/tdx.c | 21 |
2 files changed, 22 insertions, 0 deletions
diff --git a/arch/x86/include/uapi/asm/vmx.h b/arch/x86/include/uapi/asm/vmx.h index 6a9f268a2d2c..f0f4a4cf84a7 100644 --- a/arch/x86/include/uapi/asm/vmx.h +++ b/arch/x86/include/uapi/asm/vmx.h @@ -34,6 +34,7 @@ #define EXIT_REASON_TRIPLE_FAULT 2 #define EXIT_REASON_INIT_SIGNAL 3 #define EXIT_REASON_SIPI_SIGNAL 4 +#define EXIT_REASON_OTHER_SMI 6 #define EXIT_REASON_INTERRUPT_WINDOW 7 #define EXIT_REASON_NMI_WINDOW 8 diff --git a/arch/x86/kvm/vmx/tdx.c b/arch/x86/kvm/vmx/tdx.c index 11f8f1077e15..8b00639680dc 100644 --- a/arch/x86/kvm/vmx/tdx.c +++ b/arch/x86/kvm/vmx/tdx.c @@ -1758,6 +1758,27 @@ int tdx_handle_exit(struct kvm_vcpu *vcpu, fastpath_t fastpath) return tdx_emulate_io(vcpu); case EXIT_REASON_EPT_MISCONFIG: return tdx_emulate_mmio(vcpu); + case EXIT_REASON_OTHER_SMI: + /* + * Unlike VMX, SMI in SEAM non-root mode (i.e. when + * TD guest vCPU is running) will cause VM exit to TDX module, + * then SEAMRET to KVM. Once it exits to KVM, SMI is delivered + * and handled by kernel handler right away. + * + * The Other SMI exit can also be caused by the SEAM non-root + * machine check delivered via Machine Check System Management + * Interrupt (MSMI), but it has already been handled by the + * kernel machine check handler, i.e., the memory page has been + * marked as poisoned and it won't be freed to the free list + * when the TDX guest is terminated (the TDX module marks the + * guest as dead and prevent it from further running when + * machine check happens in SEAM non-root). + * + * - A MSMI will not reach here, it's handled as non_recoverable + * case above. + * - If it's not an MSMI, no need to do anything here. + */ + return 1; default: break; } |