Re: [PATCH] UefiPayloadPkg: Not use BaseCpuTimerLib by default.

["Guo Dong" <guo.dong@intel.com>]

Reviewed-by: Guo Dong <guo.dong@intel.com>

-----Original Message-----
From: Liu, Zhiguang <zhiguang.liu@intel.com> 
Sent: Thursday, January 13, 2022 11:15 PM
To: devel@edk2.groups.io
Cc: Dong, Guo <guo.dong@intel.com>; Ni, Ray <ray.ni@intel.com>; Ma, Maurice <maurice.ma@intel.com>; You, Benjamin <benjamin.you@intel.com>
Subject: [PATCH] UefiPayloadPkg: Not use BaseCpuTimerLib by default.

For recent X86 CPU, 0x15 CPUID instruction will return Time Stamp Counter. This is recommended way to get the time, and also how BaseCpuTimerLib works However, some CPU doesn't support this feature, so disable it by default.

Cc: Guo Dong <guo.dong@intel.com>
Cc: Ray Ni <ray.ni@intel.com>
Cc: Maurice Ma <maurice.ma@intel.com>
Cc: Benjamin You <benjamin.you@intel.com>
Signed-off-by: Zhiguang Liu <zhiguang.liu@intel.com>
---
 UefiPayloadPkg/UefiPayloadPkg.dsc | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/UefiPayloadPkg/UefiPayloadPkg.dsc b/UefiPayloadPkg/UefiPayloadPkg.dsc
index 3d08edfe31..65c1bd610e 100644
--- a/UefiPayloadPkg/UefiPayloadPkg.dsc
+++ b/UefiPayloadPkg/UefiPayloadPkg.dsc
@@ -111,6 +111,11 @@
   DEFINE SERIAL_DRIVER_ENABLE = TRUE   DEFINE PERFORMANCE_MEASUREMENT_ENABLE  = FALSE +  # For recent X86 CPU, 0x15 CPUID instruction will return Time Stamp Counter.+  # This is recommended way to get the time, and also how BaseCpuTimerLib works.+  # However, some CPU doesn't support this feature, so disable it by default.+  DEFINE CPU_TIMER_LIB_ENABLE  = FALSE+ [BuildOptions]   *_*_*_CC_FLAGS                 = -D DISABLE_NEW_DEPRECATED_INTERFACES   GCC:*_UNIXGCC_*_CC_FLAGS       = -DMDEPKG_NDEBUG@@ -217,7 +222,7 @@
   #   # Platform   #-!if $(UNIVERSAL_PAYLOAD) == TRUE+!if $(CPU_TIMER_LIB_ENABLE) == TRUE   TimerLib|UefiCpuPkg/Library/CpuTimerLib/BaseCpuTimerLib.inf !else   TimerLib|UefiPayloadPkg/Library/AcpiTimerLib/AcpiTimerLib.inf-- 
2.32.0.windows.2