UefiCpuPkg/PiSmmCpuDxeSmm: Check XD/BTS features in SMM relocation
CheckProcessorFeature() invokes MpService->StartupAllAps() to detect
XD/BTS features on normal boot path. It's not necessary and may cause
performance impact, because INIT-SIPI-SIPI must be sent to APs if APs
are in hlt-loop mode. XD/BTS feature detection is moved to
SmmInitHandler() in SMM relocation during normal boot path.
Cc: Michael Kinney <michael.d.kinney@intel.com>
Cc: Feng Tian <feng.tian@intel.com>
Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Jeff Fan <jeff.fan@intel.com>
Reviewed-by: Feng Tian <feng.tian@intel.com>
Reviewed-by: Michael Kinney <michael.d.kinney@intel.com>
Regression-tested-by: Laszlo Ersek <lersek@redhat.com>
diff --git a/UefiCpuPkg/PiSmmCpuDxeSmm/PiSmmCpuDxeSmm.c b/UefiCpuPkg/PiSmmCpuDxeSmm/PiSmmCpuDxeSmm.c
index db36a0a..50059e4 100644
--- a/UefiCpuPkg/PiSmmCpuDxeSmm/PiSmmCpuDxeSmm.c
+++ b/UefiCpuPkg/PiSmmCpuDxeSmm/PiSmmCpuDxeSmm.c
@@ -355,6 +355,13 @@
&mCpuHotPlugData
);
+ if (!mSmmS3Flag) {
+ //
+ // Check XD and BTS features on each processor on normal boot
+ //
+ CheckFeatureSupported (NULL);
+ }
+
if (mIsBsp) {
//
// BSP rebase is already done above.
@@ -1192,11 +1199,6 @@
}
//
- // Check XD and BTS features
- //
- CheckProcessorFeature ();
-
- //
// Initialize SMM Profile feature
//
InitSmmProfile (Cr3);
diff --git a/UefiCpuPkg/PiSmmCpuDxeSmm/SmmProfile.c b/UefiCpuPkg/PiSmmCpuDxeSmm/SmmProfile.c
index f9cea55..d315194 100644
--- a/UefiCpuPkg/PiSmmCpuDxeSmm/SmmProfile.c
+++ b/UefiCpuPkg/PiSmmCpuDxeSmm/SmmProfile.c
@@ -32,7 +32,7 @@
//
// The flag indicates if execute-disable is supported by processor.
//
-BOOLEAN mXdSupported = FALSE;
+BOOLEAN mXdSupported = TRUE;
//
// The flag indicates if execute-disable is enabled on processor.
@@ -42,7 +42,7 @@
//
// The flag indicates if BTS is supported by processor.
//
-BOOLEAN mBtsSupported = FALSE;
+BOOLEAN mBtsSupported = TRUE;
//
// The flag indicates if SMM profile starts to record data.
