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 <[email protected]> Cc: Ray Ni <[email protected]> Cc: Sean Rhodes <[email protected]> Cc: James Lu <[email protected]> Cc: Gua Guo <[email protected]> Signed-off-by: Ted Kuo <[email protected]> --- UefiCpuPkg/Library/MpInitLib/X64/MpFuncs.nasm | 1 + 1 file changed, 1 insertion(+) diff --git a/UefiCpuPkg/Library/MpInitLib/X64/MpFuncs.nasm b/UefiCpuPkg/Library/MpInitLib/X64/MpFuncs.nasm index 9ebe31795b..5bcdf7726b 100644 --- a/UefiCpuPkg/Library/MpInitLib/X64/MpFuncs.nasm +++ b/UefiCpuPkg/Library/MpInitLib/X64/MpFuncs.nasm @@ -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 -- 2.39.1.windows.1 -=-=-=-=-=-=-=-=-=-=-=- Groups.io Links: You receive all messages sent to this group. View/Reply Online (#101480): https://edk2.groups.io/g/devel/message/101480 Mute This Topic: https://groups.io/mt/97750173/21656 Group Owner: [email protected] Unsubscribe: https://edk2.groups.io/g/devel/unsub [[email protected]] -=-=-=-=-=-=-=-=-=-=-=-
