diff options
| author | Jeff Fan <jeff.fan@intel.com> | 2015-11-25 02:47:59 +0000 |
|---|---|---|
| committer | vanjeff <vanjeff@Edk2> | 2015-11-25 02:47:59 +0000 |
| commit | c7981a11840714975a7dc029366931ddec64b2a6 (patch) | |
| tree | 05bb5d84a46392d8183d1cc47bbac0453afcfd7c | |
| parent | 2f0261b7dcab49b1ee503a4b545238b59f58123d (diff) | |
| download | edk2-platforms-c7981a11840714975a7dc029366931ddec64b2a6.tar.xz | |
UefiCpuPkg/CpuMpPei: Enable x2APIC mode on BSP/APs
If x2APIC flag is set, enable x2APIC mode on all APs and BSP. Before we wakeup
APs to enable x2APIC mode, we should wait all APs have finished initialization.
Cc: Feng Tian <feng.tian@intel.com>
Cc: Michael Kinney <michael.d.kinney@intel.com>
Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Jeff Fan <jeff.fan@intel.com>
Reviewed-by: Michael Kinney <michael.d.kinney@intel.com>
git-svn-id: https://svn.code.sf.net/p/edk2/code/trunk/edk2@18934 6f19259b-4bc3-4df7-8a09-765794883524
| -rw-r--r-- | UefiCpuPkg/CpuMpPei/CpuMpPei.c | 39 |
1 files changed, 39 insertions, 0 deletions
diff --git a/UefiCpuPkg/CpuMpPei/CpuMpPei.c b/UefiCpuPkg/CpuMpPei/CpuMpPei.c index 8ed52436c9..c222522203 100644 --- a/UefiCpuPkg/CpuMpPei/CpuMpPei.c +++ b/UefiCpuPkg/CpuMpPei/CpuMpPei.c @@ -102,6 +102,20 @@ SortApicId ( }
/**
+ Enable x2APIC mode on APs.
+
+ @param Buffer Pointer to private data buffer.
+**/
+VOID
+EFIAPI
+ApFuncEnableX2Apic (
+ IN OUT VOID *Buffer
+ )
+{
+ SetApicMode (LOCAL_APIC_MODE_X2APIC);
+}
+
+/**
Get CPU MP Data pointer from the Guided HOB.
@return Pointer to Pointer to PEI CPU MP Data
@@ -385,6 +399,31 @@ CountProcessorNumber ( PeiCpuMpData->CpuCount += (UINT32)PeiCpuMpData->MpCpuExchangeInfo->NumApsExecuting;
ASSERT (PeiCpuMpData->CpuCount <= PcdGet32 (PcdCpuMaxLogicalProcessorNumber));
//
+ // Wait for all APs finished the initialization
+ //
+ while (PeiCpuMpData->FinishedCount < (PeiCpuMpData->CpuCount - 1)) {
+ CpuPause ();
+ }
+
+ if (PeiCpuMpData->X2ApicEnable) {
+ DEBUG ((EFI_D_INFO, "Force x2APIC mode!\n"));
+ //
+ // Send 2nd broadcast IPI to all APs to enable x2APIC mode
+ //
+ WakeUpAP (PeiCpuMpData, TRUE, 0, ApFuncEnableX2Apic, NULL);
+ //
+ // Wait for all known APs finished
+ //
+ while (PeiCpuMpData->FinishedCount < (PeiCpuMpData->CpuCount - 1)) {
+ CpuPause ();
+ }
+ //
+ // Enable x2APIC on BSP
+ //
+ SetApicMode (LOCAL_APIC_MODE_X2APIC);
+ }
+ DEBUG ((EFI_D_INFO, "APIC MODE is %d\n", GetApicMode ()));
+ //
// Sort BSP/Aps by CPU APIC ID in ascending order
//
SortApicId (PeiCpuMpData);
|