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-rw-r--r--SourceLevelDebugPkg/Library/DebugAgent/SmmDebugAgent/SmmDebugAgentLib.c10
1 files changed, 9 insertions, 1 deletions
diff --git a/SourceLevelDebugPkg/Library/DebugAgent/SmmDebugAgent/SmmDebugAgentLib.c b/SourceLevelDebugPkg/Library/DebugAgent/SmmDebugAgent/SmmDebugAgentLib.c
index 701c4be0d0..6216142dba 100644
--- a/SourceLevelDebugPkg/Library/DebugAgent/SmmDebugAgent/SmmDebugAgentLib.c
+++ b/SourceLevelDebugPkg/Library/DebugAgent/SmmDebugAgent/SmmDebugAgentLib.c
@@ -19,6 +19,7 @@ DEBUG_AGENT_MAILBOX mLocalMailbox;
UINTN mSavedDebugRegisters[6];
IA32_IDT_GATE_DESCRIPTOR mIdtEntryTable[33];
BOOLEAN mSkipBreakpoint = FALSE;
+BOOLEAN mSmmDebugIdtInitFlag = FALSE;
CHAR8 mWarningMsgIgnoreSmmEntryBreak[] = "Ignore smmentrybreak setting for SMI issued during DXE debugging!\r\n";
@@ -276,7 +277,14 @@ InitializeDebugAgent (
case DEBUG_AGENT_INIT_ENTER_SMI:
SaveDebugRegister ();
- InitializeDebugIdt ();
+ if (!mSmmDebugIdtInitFlag) {
+ //
+ // We only need to initialize Debug IDT table at first SMI entry
+ // after SMM relocation.
+ //
+ InitializeDebugIdt ();
+ mSmmDebugIdtInitFlag = TRUE;
+ }
//
// Check if CPU APIC Timer is working, otherwise initialize it.
//