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authorXie, Yuanhao <yuanhao.xie@intel.com>2023-06-28 16:47:23 +0800
committermergify[bot] <37929162+mergify[bot]@users.noreply.github.com>2023-07-11 02:47:27 +0000
commit629c1dacc9bdbc4fa0f31516656334b364c6c926 (patch)
tree6fc6008d083395b3ba43bede391686501444c3eb /UefiCpuPkg/Library/MpInitLib/X64/MpFuncs.nasm
parent8bb018afaf2a4af16e410bba01b42d245250c82c (diff)
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UefiCpuPkg: ApWakeupFunction directly use CpuMpData.
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>
Diffstat (limited to 'UefiCpuPkg/Library/MpInitLib/X64/MpFuncs.nasm')
-rw-r--r--UefiCpuPkg/Library/MpInitLib/X64/MpFuncs.nasm3
1 files changed, 1 insertions, 2 deletions
diff --git a/UefiCpuPkg/Library/MpInitLib/X64/MpFuncs.nasm b/UefiCpuPkg/Library/MpInitLib/X64/MpFuncs.nasm
index 5bcdf7726b..40e80ffab4 100644
--- a/UefiCpuPkg/Library/MpInitLib/X64/MpFuncs.nasm
+++ b/UefiCpuPkg/Library/MpInitLib/X64/MpFuncs.nasm
@@ -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)