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| author | Eric Dong <eric.dong@intel.com> | 2017-10-19 10:40:16 +0800 |
|---|---|---|
| committer | Eric Dong <eric.dong@intel.com> | 2017-10-20 10:30:46 +0800 |
| commit | 1e3f7a3782f1928a19bba81d9d0dba28d15fdae5 (patch) | |
| tree | 198d0a555e0a1dab56f9e344f609d6c2dc2d0776 /ShellPkg/Library/UefiShellDebug1CommandsLib/UefiShellDebug1CommandsLib.c | |
| parent | 3539e850ebf7f208dd6132a576afc737fbe90d5a (diff) | |
| download | edk2-1e3f7a3782f1928a19bba81d9d0dba28d15fdae5.tar.gz edk2-1e3f7a3782f1928a19bba81d9d0dba28d15fdae5.tar.bz2 edk2-1e3f7a3782f1928a19bba81d9d0dba28d15fdae5.zip | |
UefiCpuPkg/MpInitLib: Avoid call PcdGet* in Ap & Bsp.
MicrocodeDetect function will run by every threads, and it will
use PcdGet to get PcdCpuMicrocodePatchAddress and
PcdCpuMicrocodePatchRegionSize, if change both PCD default to dynamic,
system will in non-deterministic behavior.
By design, UEFI/PI services are single threaded and not re-entrant
so Multi processor code should not use UEFI/PI services. Here, Pcd
protocol/PPI is used to access dynamic PCDs so it would result in
non-deterministic behavior.
This code get PCD value in BSP and save them in CPU_MP_DATA for Ap.
https://bugzilla.tianocore.org/show_bug.cgi?id=726
Cc: Crystal Lee <CrystalLee@ami.com.tw>
Cc: Ruiyu Ni <ruiyu.ni@intel.com>
Contributed-under: TianoCore Contribution Agreement 1.1
Signed-off-by: Eric Dong <eric.dong@intel.com>
Reviewed-by: Ruiyu Ni <ruiyu.ni@intel.com>
Diffstat (limited to 'ShellPkg/Library/UefiShellDebug1CommandsLib/UefiShellDebug1CommandsLib.c')
0 files changed, 0 insertions, 0 deletions