SwitchApContext() can cache the first instance of MpHandOffHob so that the
second enumeration can avoid searching
for the MpHandOffHob from the top of HOB list.
> VOID
> SwitchApContext (
> - IN MP_HAND_OFF *MpHandOff
> + VOID
> )
> {
> - UINTN Index;
> - UINT32 BspNumber;
> + UINTN Index;
> + UINT32 BspNumber;
> + MP_HAND_OFF *MpHandOff;
>
> BspNumber = GetBspNumber ();
>
> - for (Index = 0; Index < MpHandOff->CpuCount; Index++) {
> - if (Index != BspNumber) {
> - *(UINTN
> *)(UINTN)MpHandOff->Info[Index].StartupProcedureAddress =
> (UINTN)SwitchContextPerAp;
> - *(UINT32 *)(UINTN)MpHandOff->Info[Index].StartupSignalAddress
> = MpHandOff->StartupSignalValue;
> + for (MpHandOff = GetMpHandOffHob (0);
> + MpHandOff != NULL;
> + MpHandOff = GetMpHandOffHob (MpHandOff->ProcessorIndex +
> MpHandOff->CpuCount))
> + {
> + for (Index = 0; Index < MpHandOff->CpuCount; Index++) {
> + if (MpHandOff->ProcessorIndex + Index != BspNumber) {
> + *(UINTN
> *)(UINTN)MpHandOff->Info[Index].StartupProcedureAddress =
> (UINTN)SwitchContextPerAp;
> + *(UINT32
> *)(UINTN)MpHandOff->Info[Index].StartupSignalAddress =
> MpHandOff->StartupSignalValue;
> + }
> }
> }
>
> //
> // Wait all APs waken up if this is not the 1st broadcast of SIPI
> //
> - for (Index = 0; Index < MpHandOff->CpuCount; Index++) {
> - if (Index != BspNumber) {
> - WaitApWakeup ((UINT32
> *)(UINTN)(MpHandOff->Info[Index].StartupSignalAddress));
> + for (MpHandOff = GetMpHandOffHob (0);
> + MpHandOff != NULL;
> + MpHandOff = GetMpHandOffHob (MpHandOff->ProcessorIndex +
> MpHandOff->CpuCount))
> + {
> + for (Index = 0; Index < MpHandOff->CpuCount; Index++) {
> + if (MpHandOff->ProcessorIndex + Index != BspNumber) {
> + WaitApWakeup ((UINT32
> *)(UINTN)(MpHandOff->Info[Index].StartupSignalAddress));
> + }
> }
> }
> }
> @@ -2226,7 +2235,7 @@ MpInitLibInitialize (
> // enables the APs to switch to a different memory section and
> continue their
> // looping process there.
> //
> - SwitchApContext (MpHandOff);
> + SwitchApContext ();
> //
> // Wait for all APs finished initialization
> //
> --
> 2.43.1
-=-=-=-=-=-=-=-=-=-=-=-
Groups.io Links: You receive all messages sent to this group.
View/Reply Online (#115578): https://edk2.groups.io/g/devel/message/115578
Mute This Topic: https://groups.io/mt/104369847/21656
Group Owner: devel+ow...@edk2.groups.io
Unsubscribe: https://edk2.groups.io/g/devel/unsub [arch...@mail-archive.com]
-=-=-=-=-=-=-=-=-=-=-=-
