diff options
| -rw-r--r-- | UefiPayloadPkg/UefiPayloadPkg.dsc | 10 |
1 files changed, 5 insertions, 5 deletions
diff --git a/UefiPayloadPkg/UefiPayloadPkg.dsc b/UefiPayloadPkg/UefiPayloadPkg.dsc index 65c1bd610e..1ce96a51c1 100644 --- a/UefiPayloadPkg/UefiPayloadPkg.dsc +++ b/UefiPayloadPkg/UefiPayloadPkg.dsc @@ -111,10 +111,10 @@ 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
+ # For recent X86 CPU, 0x15 CPUID instruction will return Time Stamp Counter Frequence.
+ # This is how BaseCpuTimerLib works, and a recommended way to get Frequence, so set the default value as TRUE.
+ # Note: for emulation platform such as QEMU, this may not work and should set it as FALSE
+ DEFINE CPU_TIMER_LIB_ENABLE = TRUE
[BuildOptions]
*_*_*_CC_FLAGS = -D DISABLE_NEW_DEPRECATED_INTERFACES
@@ -222,7 +222,7 @@ #
# Platform
#
-!if $(CPU_TIMER_LIB_ENABLE) == TRUE
+!if $(CPU_TIMER_LIB_ENABLE) == TRUE && $(UNIVERSAL_PAYLOAD) == TRUE
TimerLib|UefiCpuPkg/Library/CpuTimerLib/BaseCpuTimerLib.inf
!else
TimerLib|UefiPayloadPkg/Library/AcpiTimerLib/AcpiTimerLib.inf
|