On 3/4/22 20:49, isaku.yamahata@xxxxxxxxx wrote:
From: Isaku Yamahata <isaku.yamahata@xxxxxxxxx>
If the control reaches EXIT_REASON_OTHER_SMI, #SMI is delivered and
handled right after returning from the TDX module to KVM nothing needs to
be done in KVM. Continue TDX vcpu execution.
Signed-off-by: Isaku Yamahata <isaku.yamahata@xxxxxxxxx>
---
arch/x86/include/uapi/asm/vmx.h | 1 +
arch/x86/kvm/vmx/tdx.c | 7 +++++++
2 files changed, 8 insertions(+)
diff --git a/arch/x86/include/uapi/asm/vmx.h b/arch/x86/include/uapi/asm/vmx.h
index 946d761adbd3..3d9b4598e166 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 155208a8d768..6fbe89bcfe1e 100644
--- a/arch/x86/kvm/vmx/tdx.c
+++ b/arch/x86/kvm/vmx/tdx.c
@@ -1097,6 +1097,13 @@ int tdx_handle_exit(struct kvm_vcpu *vcpu, fastpath_t fastpath)
WARN_ON_ONCE(fastpath != EXIT_FASTPATH_NONE);
switch (exit_reason.basic) {
+ case EXIT_REASON_OTHER_SMI:
+ /*
+ * If reach here, it's not a MSMI.
Please expand MSMI. Otherwise,
Reviewed-by: Paolo Bonzini <pbonzini@xxxxxxxxxx>
Paolo
+ * #SMI is delivered and handled right after SEAMRET, nothing
+ * needs to be done in KVM.
+ */
+ return 1;
default:
break;
}
