UefiCpuPkg CpuCommonFeaturesLib: Enhance Ppin code

BZ: https://bugzilla.tianocore.org/show_bug.cgi?id=1961
Enhance Ppin code to enable and unlock for TRUE State,
and disable and lock for FALSE State.
Note: enable and lock could not be set both.
According to SDM, once Enable_PPIN is set, attempt to write
1 to LockOut will cause #GP, and writing 1 to LockOut is
permitted only if Enable_PPIN is clear.

Cc: Laszlo Ersek <lersek@redhat.com>
Cc: Eric Dong <eric.dong@intel.com>
Cc: Ray Ni <ray.ni@intel.com>
Cc: Chandana Kumar <chandana.c.kumar@intel.com>
Cc: Kevin Li <kevin.y.li@intel.com>
Signed-off-by: Star Zeng <star.zeng@intel.com>
Reviewed-by: Ray Ni <ray.ni@intel.com>
Reviewed-by: Eric Dong <eric.dong@intel.com>
This commit is contained in:
Star Zeng
2019-07-05 13:14:33 +08:00
committed by Eric Dong
parent 51dd408ae1
commit 84a4594720
3 changed files with 72 additions and 12 deletions

View File

@ -863,6 +863,21 @@ FeatureControlGetConfigData (
IN UINTN NumberOfProcessors
);
/**
Prepares for the data used by CPU feature detection and initialization.
@param[in] NumberOfProcessors The number of CPUs in the platform.
@return Pointer to a buffer of CPU related configuration data.
@note This service could be called by BSP only.
**/
VOID *
EFIAPI
PpinGetConfigData (
IN UINTN NumberOfProcessors
);
/**
Detects if Protected Processor Inventory Number feature supported on current
processor.