diff options
| author | Jeff Fan <jeff.fan@intel.com> | 2016-07-21 00:29:49 +0800 |
|---|---|---|
| committer | Jeff Fan <jeff.fan@intel.com> | 2016-08-17 20:01:45 +0800 |
| commit | fe627769c949d368ac048053ec21596cb1c51390 (patch) | |
| tree | da8f60c4c8ed3274b4b34527f1e47272a3ffe774 /UefiCpuPkg | |
| parent | 03434dffb7050c168579de92991194cc2f2b0721 (diff) | |
UefiCpuPkg/MpInitLib: 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: Michael Kinney <michael.d.kinney@intel.com>
Cc: Feng Tian <feng.tian@intel.com>
Cc: Giri P Mudusuru <giri.p.mudusuru@intel.com>
Cc: Laszlo Ersek <lersek@redhat.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>
Tested-by: Laszlo Ersek <lersek@redhat.com>
Tested-by: Michael Kinney <michael.d.kinney@intel.com>
Diffstat (limited to 'UefiCpuPkg')
| -rw-r--r-- | UefiCpuPkg/Library/MpInitLib/MpLib.c | 32 |
1 files changed, 32 insertions, 0 deletions
diff --git a/UefiCpuPkg/Library/MpInitLib/MpLib.c b/UefiCpuPkg/Library/MpInitLib/MpLib.c index 8f7cf43a7c..d84dfec506 100644 --- a/UefiCpuPkg/Library/MpInitLib/MpLib.c +++ b/UefiCpuPkg/Library/MpInitLib/MpLib.c @@ -217,6 +217,20 @@ GetApLoopMode ( }
/**
+ Enable x2APIC mode on APs.
+
+ @param[in, out] Buffer Pointer to private data buffer.
+**/
+VOID
+EFIAPI
+ApFuncEnableX2Apic (
+ IN OUT VOID *Buffer
+ )
+{
+ SetApicMode (LOCAL_APIC_MODE_X2APIC);
+}
+
+/**
Do sync on APs.
@param[in, out] Buffer Pointer to private data buffer.
@@ -299,6 +313,24 @@ CollectProcessorCount ( CpuPause ();
}
+ if (CpuMpData->X2ApicEnable) {
+ DEBUG ((DEBUG_INFO, "Force x2APIC mode!\n"));
+ //
+ // Wakeup all APs to enable x2APIC mode
+ //
+ WakeUpAP (CpuMpData, TRUE, 0, ApFuncEnableX2Apic, NULL);
+ //
+ // Wait for all known APs finished
+ //
+ while (CpuMpData->FinishedCount < (CpuMpData->CpuCount - 1)) {
+ CpuPause ();
+ }
+ //
+ // Enable x2APIC on BSP
+ //
+ SetApicMode (LOCAL_APIC_MODE_X2APIC);
+ }
+ DEBUG ((DEBUG_INFO, "APIC MODE is %d\n", GetApicMode ()));
DEBUG ((DEBUG_INFO, "MpInitLib: Find %d processors in system.\n", CpuMpData->CpuCount));
return CpuMpData->CpuCount;
|