From 59a119f0fcaed5a7cab4829bb19dd7ffa94e16a0 Mon Sep 17 00:00:00 2001 From: Jeff Fan Date: Tue, 25 Apr 2017 11:22:00 +0800 Subject: [PATCH] UefiCpuPkg/MpLib.c: Set AP state after X2APIC mode enabled After X2APIC mode is enabled, APs need to be set tp IDLE state, otherwise APs cannot be waken up by MP PPI services. https://bugzilla.tianocore.org/show_bug.cgi?id=505 Cc: Feng Tian Cc: Michael Kinney Contributed-under: TianoCore Contribution Agreement 1.0 Signed-off-by: Jeff Fan Reviewed-by: Feng Tian --- UefiCpuPkg/Library/MpInitLib/MpLib.c | 8 ++++++++ 1 file changed, 8 insertions(+) diff --git a/UefiCpuPkg/Library/MpInitLib/MpLib.c b/UefiCpuPkg/Library/MpInitLib/MpLib.c index e5e211de8d..407c44c95e 100644 --- a/UefiCpuPkg/Library/MpInitLib/MpLib.c +++ b/UefiCpuPkg/Library/MpInitLib/MpLib.c @@ -434,6 +434,8 @@ CollectProcessorCount ( IN CPU_MP_DATA *CpuMpData ) { + UINTN Index; + // // Send 1st broadcast IPI to APs to wakeup APs // @@ -465,6 +467,12 @@ CollectProcessorCount ( // Enable x2APIC on BSP // SetApicMode (LOCAL_APIC_MODE_X2APIC); + // + // Set BSP/Aps state to IDLE + // + for (Index = 0; Index < CpuMpData->CpuCount; Index++) { + SetApState (&CpuMpData->CpuData[Index], CpuStateIdle); + } } DEBUG ((DEBUG_INFO, "APIC MODE is %d\n", GetApicMode ())); // -- 2.39.2