Reviewed-by: Guo Dong <[email protected]> -----Original Message----- From: Liu, Zhiguang <[email protected]> Sent: Thursday, January 13, 2022 11:15 PM To: [email protected] Cc: Dong, Guo <[email protected]>; Ni, Ray <[email protected]>; Ma, Maurice <[email protected]>; You, Benjamin <[email protected]> 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 <[email protected]> Cc: Ray Ni <[email protected]> Cc: Maurice Ma <[email protected]> Cc: Benjamin You <[email protected]> Signed-off-by: Zhiguang Liu <[email protected]> --- 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 -=-=-=-=-=-=-=-=-=-=-=- Groups.io Links: You receive all messages sent to this group. View/Reply Online (#85761): https://edk2.groups.io/g/devel/message/85761 Mute This Topic: https://groups.io/mt/88415742/21656 Group Owner: [email protected] Unsubscribe: https://edk2.groups.io/g/devel/unsub [[email protected]] -=-=-=-=-=-=-=-=-=-=-=-
