UefiCpuPkg/CpuCommonFeaturesLib: SMXE bit of CR4 should set

Add code to set SMXE in CR4 in the SmxInitialize flow when SMX is enabled.

Signed-off-by: Jason Voelz <jason.voelz@intel.com>
Cc: Ray Ni <ray.ni@intel.com>
Reviewed-by: Ray Ni <ray.ni@intel.com>

diff --git a/UefiCpuPkg/Library/CpuCommonFeaturesLib/FeatureControl.c b/UefiCpuPkg/Library/CpuCommonFeaturesLib/FeatureControl.c
index 38d3f53f5646f5f37555c806f0f03c80606d242e..b4474d2fab4dcb6115718564919719444542dd57 100644 (file)
--- a/UefiCpuPkg/Library/CpuCommonFeaturesLib/FeatureControl.c
+++ b/UefiCpuPkg/Library/CpuCommonFeaturesLib/FeatureControl.c
@@ -240,6 +240,15 @@ SmxInitialize (
     Status = RETURN_UNSUPPORTED;\r
   }\r
 \r
+  CPU_REGISTER_TABLE_WRITE_FIELD (\r
+    ProcessorNumber,\r
+    ControlRegister,\r
+    4,\r
+    IA32_CR4,\r
+    Bits.SMXE,\r
+    (State) ? 1 : 0\r
+  )\r
+\r
   CPU_REGISTER_TABLE_TEST_THEN_WRITE_FIELD (\r
     ProcessorNumber,\r
     Msr,\r