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UefiCpuPkg/MpInitLib: Add support for multiple HOBs to SwitchApContext() 

Rename the MpHandOff parameter to FirstMpHandOff.  Add loops so the
function inspects all HOBs present in the system.

Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
Reviewed-by: Ray Ni <ray.ni@intel.com>
Reviewed-by: Laszlo Ersek <lersek@redhat.com>
Message-Id: <20240222160106.686484-4-kraxel@redhat.com>
This commit is contained in:
Gerd Hoffmann 2024-02-22 17:01:03 +01:00 committed by mergify[bot]
parent b485230462
commit e2c9d8eba4
2 changed files with 24 additions and 13 deletions
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35
UefiCpuPkg/Library/MpInitLib/MpLib.c
View File

@ -1938,31 +1938,42 @@ GetBspNumber (
This procedure allows the AP to switch to another section of
memory and continue its loop there.
@param[in] MpHandOff Pointer to MP hand-off data structure.
@param[in] FirstMpHandOff Pointer to first MP hand-off HOB body.
**/
VOID
SwitchApContext (
IN MP_HAND_OFF *MpHandOff
IN CONST MP_HAND_OFF *FirstMpHandOff
)
{
UINTN Index;
UINT32 BspNumber;
UINTN Index;
UINT32 BspNumber;
CONST MP_HAND_OFF *MpHandOff;
BspNumber = GetBspNumber (MpHandOff);
BspNumber = GetBspNumber (FirstMpHandOff);
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 = FirstMpHandOff;
MpHandOff != NULL;
MpHandOff = GetNextMpHandOffHob (MpHandOff))
{
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 = FirstMpHandOff;
MpHandOff != NULL;
MpHandOff = GetNextMpHandOffHob (MpHandOff))
{
for (Index = 0; Index < MpHandOff->CpuCount; Index++) {
if (MpHandOff->ProcessorIndex + Index != BspNumber) {
WaitApWakeup ((UINT32 *)(UINTN)(MpHandOff->Info[Index].StartupSignalAddress));
}
}
}
}

2
UefiCpuPkg/Library/MpInitLib/MpLib.h
View File

@ -482,7 +482,7 @@ GetWakeupBuffer (
**/
VOID
SwitchApContext (
IN MP_HAND_OFF *MpHandOff
IN CONST MP_HAND_OFF *FirstMpHandOff
);
/**