This patch use the Context to indicate SMM Debug Agent support or
not if InitFlag is DEBUG_AGENT_INIT_SMM. Context must be the pointer
to the BOOLEAN value if it's not NULL.

Cc: Ray Ni <ray.ni@intel.com>
Cc: Liming Gao <gaoliming@byosoft.com.cn>
Signed-off-by: Jiaxin Wu <jiaxin.wu@intel.com>
---
 MdeModulePkg/Library/DebugAgentLibNull/DebugAgentLibNull.c | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/MdeModulePkg/Library/DebugAgentLibNull/DebugAgentLibNull.c b/MdeModulePkg/Library/DebugAgentLibNull/DebugAgentLibNull.c
index 8e70705eb6..a7f4945c03 100644
--- a/MdeModulePkg/Library/DebugAgentLibNull/DebugAgentLibNull.c
+++ b/MdeModulePkg/Library/DebugAgentLibNull/DebugAgentLibNull.c
@@ -22,10 +22,13 @@
   passing in the Context to be its parameter.
 
   If Function() is NULL, Debug Agent Library instance will return after setup debug
   environment.
 
+  If InitFlag is DEBUG_AGENT_INIT_SMM, Context must be the pointer to the BOOLEAN
+  value if it's not NULL, which indicates SMM Debug Agent supported or not.
+
   @param[in] InitFlag     Init flag is used to decide the initialize process.
   @param[in] Context      Context needed according to InitFlag; it was optional.
   @param[in] Function     Continue function called by debug agent library; it was
                           optional.
 
@@ -36,10 +39,16 @@ InitializeDebugAgent (
   IN UINT32                InitFlag,
   IN VOID                  *Context  OPTIONAL,
   IN DEBUG_AGENT_CONTINUE  Function  OPTIONAL
   )
 {
+  switch (InitFlag) {
+    case DEBUG_AGENT_INIT_SMM:
+      *(BOOLEAN *)Context = FALSE;
+      return;
+  }
+
   if (Function != NULL) {
     Function (Context);
   }
 }
 
-- 
2.16.2.windows.1



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