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UefiCpuPkg: Solve that stack top address is not mapped in pagetable

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For the case CPU logic index is 0, RSP points to the very top of all AP
stacks. That address is not mapped in page table.

Cc: Guo Dong <guo.dong@intel.com>
Cc: Ray Ni <ray.ni@intel.com>
Cc: Sean Rhodes <sean@starlabs.systems>
Cc: James Lu <james.lu@intel.com>
Cc: Gua Guo <gua.guo@intel.com>
Signed-off-by: Ted Kuo <ted.kuo@intel.com>
Reviewed-by: Ray Ni <ray.ni@intel.com>
This commit is contained in:
Xie, Yuanhao 2023-03-21 15:29:59 +08:00 committed by Mikhail Krichanov
parent e4769ceaee
commit d5d26218fb
1 changed files with 1 additions and 0 deletions
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UefiCpuPkg/Library/MpInitLib/X64/MpFuncs.nasm
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@ -315,6 +315,7 @@ MwaitCheckGeneric:
MwaitLoopGeneric:
cli
mov rax, rsp ; Set Monitor Address
sub eax, 8 ; To ensure the monitor address is in the page table
xor ecx, ecx ; ecx = 0
xor edx, edx ; edx = 0
monitor