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UefiCpuPkg: ApWakeupFunction directly use CpuMpData.

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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
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3
UefiCpuPkg/Library/MpInitLib/X64/MpFuncs.nasm
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@@ -259,8 +259,7 @@ CProcedureInvoke:
add rsp, 20h
mov edx, ebx ; edx is ApIndex
mov ecx, esi
add ecx, MP_CPU_EXCHANGE_INFO_OFFSET ; rcx is address of exchange info data buffer
mov rcx, qword [esi + MP_CPU_EXCHANGE_INFO_FIELD (CpuMpData)]
mov edi, esi
add edi, MP_CPU_EXCHANGE_INFO_FIELD (CFunction)