sravan/system76-edk2
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

UefiCpuPkg: ApWakeupFunction directly use CpuMpData.

Browse Source 
In the original design, once the APs finished executing their assembly
code and switched to executing C code, they would enter a continuous
loop within a function. In this function, they would collect CpuMpData
using the MP_CPU_EXCHANGE_INFO mechanism. However, in the updated
approach, CpuMpData can now be passed directly to the ApWakeUpFunction,
bypassing the need for MP_CPU_EXCHANGE_INFO. This modification is made
in preparation for eliminating the requirement of a second
INIT-SIPI-SIPI sequence in the DXE phase.

Tested-by: Gerd Hoffmann <kraxel@redhat.com>
Acked-by: Gerd Hoffmann <kraxel@redhat.com>
Reviewed-by: Ray Ni <ray.ni@intel.com>
Cc: Eric Dong <eric.dong@intel.com>
Cc: Rahul Kumar <rahul1.kumar@intel.com>
Cc: Tom Lendacky <thomas.lendacky@amd.com>
Signed-off-by: Yuanhao Xie <yuanhao.xie@intel.com>
This commit is contained in:
Xie, Yuanhao
2023-06-28 16:47:23 +08:00
committed by mergify[bot]
parent 8bb018afaf
commit 629c1dacc9
3 changed files with 6 additions and 13 deletions
Download Patch File Download Diff File Expand all files Collapse all files

4
UefiCpuPkg/Library/MpInitLib/Ia32/MpFuncs.nasm
View File

@@ -197,8 +197,8 @@ CProcedureInvoke:
push ebx ; Push ApIndex
mov eax, esi
add eax, MP_CPU_EXCHANGE_INFO_OFFSET
push eax ; push address of exchange info data buffer
add eax, MP_CPU_EXCHANGE_INFO_FIELD (CpuMpData)
push dword [eax] ; push address of CpuMpData
mov edi, esi
add edi, MP_CPU_EXCHANGE_INFO_FIELD (CFunction)