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| author | Jeff Fan <jeff.fan@intel.com> | 2015-12-18 05:48:45 +0000 |
|---|---|---|
| committer | vanjeff <vanjeff@Edk2> | 2015-12-18 05:48:45 +0000 |
| commit | 6be91122b1b3303f6c97a9545a300021acc3e9c1 (patch) | |
| tree | 5d5b39e54b2e90b4f16bc54297735a5b3592d275 /UefiCpuPkg/Include | |
| parent | d9786fd59f731cd621c16c38cfa82d40f955bbc6 (diff) | |
| download | edk2-platforms-6be91122b1b3303f6c97a9545a300021acc3e9c1.tar.xz | |
UefiCpuPkg/CpuMpPei: Add GetApLoopMode() to get AP loop mode
Add GetApLoopMode() that will get PCD PcdCpuApLoopMode firstly. If it is
ApInMwaitLoop, we will check if MONITOR/MWAIT feature supported by CPUID. If
MONITOR/MWAIT feature is not supported, force AP loop mode to ApInHltLoop.
GetApLoopMode() also return the largest line size required.
(Sync patch r19343 from main trunk.)
Contributed-under: TianoCore Contribution Agreement 1.0
Cc: Feng Tian <feng.tian@intel.com>
Cc: Michael Kinney <michael.d.kinney@intel.com>
Cc: Jordan Justen <jordan.l.justen@intel.com>
Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Jeff Fan <jeff.fan@intel.com>
Signed-off-by: Michael Kinney <michael.d.kinney@intel.com>
Tested-by: Michael Kinney <michael.d.kinney@intel.com>
Reviewed-by: Michael Kinney <michael.d.kinney@intel.com>
git-svn-id: https://svn.code.sf.net/p/edk2/code/branches/UDK2015@19360 6f19259b-4bc3-4df7-8a09-765794883524
Diffstat (limited to 'UefiCpuPkg/Include')
| -rw-r--r-- | UefiCpuPkg/Include/Register/Cpuid.h | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/UefiCpuPkg/Include/Register/Cpuid.h b/UefiCpuPkg/Include/Register/Cpuid.h index 6730551ff8..f8ff247d09 100644 --- a/UefiCpuPkg/Include/Register/Cpuid.h +++ b/UefiCpuPkg/Include/Register/Cpuid.h @@ -31,6 +31,8 @@ WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED. #define CPUID_CACHE_PARAMS 0x4
+#define CPUID_MONITOR_MWAIT 0x5
+
#define CPUID_EXTENDED_TOPOLOGY 0xB
#define CPUID_EXTENDED_TOPOLOGY_LEVEL_TYPE_INVALID 0x0
#define CPUID_EXTENDED_TOPOLOGY_LEVEL_TYPE_SMT 0x1
|