From: Jordan Justen <jordan.l.justen@intel.com>
Date: Thu, 13 Nov 2014 18:30:09 +0000 (+0000)
Subject: UefiCpuPkg/CpuDxe: Startup APs
X-Git-Tag: edk2-stable201903~10640
X-Git-Url: https://git.proxmox.com/?p=mirror_edk2.git;a=commitdiff_plain;h=dee9376ffc6e5522bb5e50512b521952a5421fa5

UefiCpuPkg/CpuDxe: Startup APs

This sequence should happen:
* CpuMp.c: Allocate a stack for the APs
* ApStartup.c: Send Start IPI to wake APs in 16-bit real mode
* MpAsm.S: AP enters CpuDxe driver code without stack
  - AP grabs a lock
  - AP sets up stack
  - AP calls CpuMp.c:ApEntryPointInC

Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Jordan Justen <jordan.l.justen@intel.com>
Signed-off-by: Chen Fan <chen.fan.fnst@cn.fujitsu.com>
Reviewed-by: Jeff Fan <jeff.fan@intel.com>

git-svn-id: https://svn.code.sf.net/p/edk2/code/trunk/edk2@16370 6f19259b-4bc3-4df7-8a09-765794883524
---

diff --git a/UefiCpuPkg/CpuDxe/CpuMp.c b/UefiCpuPkg/CpuDxe/CpuMp.c
index 5d5c7db765..2bc9f70bbb 100644
--- a/UefiCpuPkg/CpuDxe/CpuMp.c
+++ b/UefiCpuPkg/CpuDxe/CpuMp.c
@@ -1500,6 +1500,9 @@ InitializeMpSupport (
 
   PrepareAPStartupCode ();
 
+  StartApsStackless ();
+
+  DEBUG ((DEBUG_INFO, "Detect CPU count: %d\n", mMpSystemData.NumberOfProcessors));
   if (mMpSystemData.NumberOfProcessors == 1) {
     FreeApStartupCode ();
     FreePages (mCommonStack, EFI_SIZE_TO_PAGES (gMaxLogicalProcessorNumber * gApStackSize));