OvmfPkg: Add the Test command in TDX MailBox

Refer to the latest changed in ACPI 6.6, add the command.

Signed-off-by: Ceping Sun <[email protected]>
reviewed-by: Min Xu <[email protected]>
tested-by: Kirill A. Shutemov <[email protected]>

Author: sunceping

OvmfPkg/Include/IndustryStandard/IntelTdx.h

@@ -20,8 +20,9 @@
 typedef enum {
   MpProtectedModeWakeupCommandNoop        = 0,
   MpProtectedModeWakeupCommandWakeup      = 1,
-  MpProtectedModeWakeupCommandSleep       = 2,
-  MpProtectedModeWakeupCommandAcceptPages = 3,
+  MpProtectedModeWakeupCommandTest        = 2,
+  MpProtectedModeWakeupCommandSleep       = 3,
+  MpProtectedModeWakeupCommandAcceptPages = 4,
 } MP_CPU_PROTECTED_MODE_WAKEUP_CMD;
 
 #pragma pack(1)

OvmfPkg/Include/TdxCommondefs.inc

@@ -41,8 +41,9 @@ ERROR_INVALID_FALLBACK_PAGE_LEVEL         equ       3
 
 MpProtectedModeWakeupCommandNoop          equ       0
 MpProtectedModeWakeupCommandWakeup        equ       1
-MpProtectedModeWakeupCommandSleep         equ       2
-MpProtectedModeWakeupCommandAcceptPages   equ       3
+MpProtectedModeWakeupCommandTest          equ       2
+MpProtectedModeWakeupCommandSleep         equ       3
+MpProtectedModeWakeupCommandAcceptPages   equ       4
 
 MailboxApicIdInvalid                      equ       0xffffffff
 MailboxApicidBroadcast                    equ       0xfffffffe

OvmfPkg/TdxDxe/X64/ApRunLoop.nasm

@@ -62,6 +62,8 @@ MailBoxLoop:
 MailBoxProcessCommand:
     cmp        dword [rbx + CommandOffset], MpProtectedModeWakeupCommandWakeup
     je         MailBoxWakeUp
+    cmp        dword [rbx + CommandOffset], MpProtectedModeWakeupCommandTest
+    je         MailBoxTest
     cmp        dword [rbx + CommandOffset], MpProtectedModeWakeupCommandSleep
     je         MailBoxSleep
     ; Don't support this command, so ignore
@@ -72,6 +74,9 @@ MailBoxWakeUp:
     ; the command field back to zero as acknowledgement.
     mov        qword [rbx + CommandOffset], 0
     jmp        rax
+MailBoxTest:
+    mov        qword [rbx + CommandOffset], 0
+    jmp        MailBoxLoop
 MailBoxSleep:
     jmp       $
 Panic: