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UefiCpuPkg/MpInitLib: add struct MP_HAND_OFF_CONFIG

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Move the WaitLoopExecutionMode and StartupSignalValue fields to a
separate HOB with the new struct.

WaitLoopExecutionMode and StartupSignalValue are independent of
processor index ranges; they are global to MpInitLib (i.e., the entire
system). Therefore they shouldn't be repeated in every MpHandOff GUID
HOB.

Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
Message-Id: <20240228114855.1615788-1-kraxel@redhat.com>
Reviewed-by: Laszlo Ersek <lersek@redhat.com>
Cc: Rahul Kumar <rahul1.kumar@intel.com>
Cc: Ray Ni <ray.ni@intel.com>
Cc: Laszlo Ersek <lersek@redhat.com>
Cc: Oliver Steffen <osteffen@redhat.com>
Cc: Gerd Hoffmann <kraxel@redhat.com>
[lersek@redhat.com: turn the "Cc:" message headers from Gerd's on-list
 posting into "Cc:" tags in the commit message, in order to pacify
 "PatchCheck.py"]
This commit is contained in:
Gerd Hoffmann
2024-02-28 12:48:55 +01:00
committed by mergify[bot]
parent bac9c74080
commit dc7cfa9bab
4 changed files with 75 additions and 22 deletions
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47
UefiCpuPkg/Library/MpInitLib/MpLib.c
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@@ -15,6 +15,7 @@
EFI_GUID mCpuInitMpLibHobGuid = CPU_INIT_MP_LIB_HOB_GUID;
EFI_GUID mMpHandOffGuid = MP_HANDOFF_GUID;
EFI_GUID mMpHandOffConfigGuid = MP_HANDOFF_CONFIG_GUID;
/**
Save the volatile registers required to be restored following INIT IPI.
@@ -1935,11 +1936,13 @@ GetBspNumber (
This procedure allows the AP to switch to another section of
memory and continue its loop there.
@param[in] FirstMpHandOff Pointer to first MP hand-off HOB body.
@param[in] MpHandOffConfig Pointer to MP hand-off config HOB body.
@param[in] FirstMpHandOff Pointer to first MP hand-off HOB body.
**/
VOID
SwitchApContext (
IN CONST MP_HAND_OFF *FirstMpHandOff
IN CONST MP_HAND_OFF_CONFIG *MpHandOffConfig,
IN CONST MP_HAND_OFF *FirstMpHandOff
)
{
UINTN Index;
@@ -1955,7 +1958,7 @@ SwitchApContext (
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;
*(UINT32 *)(UINTN)MpHandOff->Info[Index].StartupSignalAddress = MpHandOffConfig->StartupSignalValue;
}
}
}
@@ -1975,6 +1978,26 @@ SwitchApContext (
}
}
/**
Get pointer to MP_HAND_OFF_CONFIG GUIDed HOB body.
@return The pointer to MP_HAND_OFF_CONFIG structure.
**/
MP_HAND_OFF_CONFIG *
GetMpHandOffConfigHob (
VOID
)
{
EFI_HOB_GUID_TYPE *GuidHob;
GuidHob = GetFirstGuidHob (&mMpHandOffConfigGuid);
if (GuidHob == NULL) {
return NULL;
}
return (MP_HAND_OFF_CONFIG *)GET_GUID_HOB_DATA (GuidHob);
}
/**
Get pointer to next MP_HAND_OFF GUIDed HOB body.
@@ -2022,6 +2045,7 @@ MpInitLibInitialize (
VOID
)
{
MP_HAND_OFF_CONFIG *MpHandOffConfig;
MP_HAND_OFF *FirstMpHandOff;
MP_HAND_OFF *MpHandOff;
CPU_INFO_IN_HOB *CpuInfoInHob;
@@ -2239,13 +2263,24 @@ MpInitLibInitialize (
}
}
MpHandOffConfig = GetMpHandOffConfigHob ();
if (MpHandOffConfig == NULL) {
DEBUG ((
DEBUG_ERROR,
"%a: at least one MpHandOff HOB, but no MpHandOffConfig HOB\n",
__func__
));
ASSERT (MpHandOffConfig != NULL);
CpuDeadLoop ();
}
DEBUG ((
DEBUG_INFO,
"FirstMpHandOff->WaitLoopExecutionMode: %04d, sizeof (VOID *): %04d\n",
FirstMpHandOff->WaitLoopExecutionMode,
MpHandOffConfig->WaitLoopExecutionMode,
sizeof (VOID *)
));
if (FirstMpHandOff->WaitLoopExecutionMode == sizeof (VOID *)) {
if (MpHandOffConfig->WaitLoopExecutionMode == sizeof (VOID *)) {
ASSERT (CpuMpData->ApLoopMode != ApInHltLoop);
CpuMpData->FinishedCount = 0;
@@ -2261,7 +2296,7 @@ MpInitLibInitialize (
// enables the APs to switch to a different memory section and continue their
// looping process there.
//
SwitchApContext (FirstMpHandOff);
SwitchApContext (MpHandOffConfig, FirstMpHandOff);
//
// Wait for all APs finished initialization
//