[PATCH] UefiPayloadPkg: Not use BaseCpuTimerLib by default.


Zhiguang Liu
 

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/UefiPayload=
Pkg.dsc
index 3d08edfe31..65c1bd610e 100644
--- a/UefiPayloadPkg/UefiPayloadPkg.dsc
+++ b/UefiPayloadPkg/UefiPayloadPkg.dsc
@@ -111,6 +111,11 @@
DEFINE SERIAL_DRIVER_ENABLE =3D TRUE=0D
DEFINE PERFORMANCE_MEASUREMENT_ENABLE =3D FALSE=0D
=0D
+ # For recent X86 CPU, 0x15 CPUID instruction will return Time Stamp Coun=
ter.=0D
+ # This is recommended way to get the time, and also how BaseCpuTimerLib =
works.=0D
+ # However, some CPU doesn't support this feature, so disable it by defau=
lt.=0D
+ DEFINE CPU_TIMER_LIB_ENABLE =3D FALSE=0D
+=0D
[BuildOptions]=0D
*_*_*_CC_FLAGS =3D -D DISABLE_NEW_DEPRECATED_INTERFACES=
=0D
GCC:*_UNIXGCC_*_CC_FLAGS =3D -DMDEPKG_NDEBUG=0D
@@ -217,7 +222,7 @@
#=0D
# Platform=0D
#=0D
-!if $(UNIVERSAL_PAYLOAD) =3D=3D TRUE=0D
+!if $(CPU_TIMER_LIB_ENABLE) =3D=3D TRUE=0D
TimerLib|UefiCpuPkg/Library/CpuTimerLib/BaseCpuTimerLib.inf=0D
!else=0D
TimerLib|UefiPayloadPkg/Library/AcpiTimerLib/AcpiTimerLib.inf=0D
--=20
2.32.0.windows.2

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