The
Quark_EDKII_v1.1.0/IA32FamilyCpuBasePkg/CpuArchDxe
driver applies any MTRR changes to APs, if the EFI_MP_SERVICES_PROTOCOL is
available. We should do the same; port it to UefiCpuPkg.
The broadcast should occur even if PcdCpuSyncMtrrToAcpiNvs is set to
FALSE; in that case we just use a local MTRR_SETTINGS buffer, rather than
the firmware-wide "mMtrrTable" object.
Cc: Jeff Fan <jeff....@intel.com>
Cc: Chen Fan <chen.fan.f...@cn.fujitsu.com>
Cc: Jordan Justen <jordan.l.jus...@intel.com>
Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Laszlo Ersek <ler...@redhat.com>
---
UefiCpuPkg/CpuDxe/CpuDxe.c | 46 +++++++++++++++++---
1 file changed, 41 insertions(+), 5 deletions(-)
diff --git a/UefiCpuPkg/CpuDxe/CpuDxe.c b/UefiCpuPkg/CpuDxe/CpuDxe.c
index 3d11807..269f834 100644
--- a/UefiCpuPkg/CpuDxe/CpuDxe.c
+++ b/UefiCpuPkg/CpuDxe/CpuDxe.c
@@ -407,11 +407,47 @@ CpuSetMemoryAttributes (
);
if (!RETURN_ERROR (Status)) {
- if (FeaturePcdGet (PcdCpuSyncMtrrToAcpiNvs)) {
- //
- // Sync saved MTRR settings
- //
- MtrrGetAllMtrrs (mMtrrTable);
+ MTRR_SETTINGS *SyncToBuffer;
+ MTRR_SETTINGS LocalBuffer;
+ EFI_STATUS MpStatus;
+ EFI_MP_SERVICES_PROTOCOL *MpService;
+
+ SyncToBuffer =
+ FeaturePcdGet (PcdCpuSyncMtrrToAcpiNvs) ? mMtrrTable : &LocalBuffer;
+ MpStatus = gBS->LocateProtocol (
+ &gEfiMpServiceProtocolGuid,
+ NULL,
+ (VOID **) &MpService
+ );
+
+ //
+ // Sync saved MTRR settings if (a) we have to reflect them to AcpiNVS, or
+ // (b) broadcast them to APs, or (c) both.
+ //
+ if (FeaturePcdGet (PcdCpuSyncMtrrToAcpiNvs) || !EFI_ERROR (MpStatus)) {
+ MtrrGetAllMtrrs (SyncToBuffer);
+ }
+
+ //
+ // Synchronize the update with all APs
+ //
+ if (!EFI_ERROR (MpStatus)) {
+ MpStatus = MpService->StartupAllAPs (
+ MpService, // This
+ LoadMtrrData, // Procedure
+ TRUE, // SingleThread
+ NULL, // WaitEvent
+ 0, // TimeoutInMicrosecsond
+ SyncToBuffer, // ProcedureArgument
+ NULL // FailedCpuList
+ );
+ if (MpStatus == EFI_NOT_STARTED) {
+ //
+ // If no enabled APs exit in the system, return success
+ //
+ MpStatus = EFI_SUCCESS;
+ }
+ ASSERT_EFI_ERROR (MpStatus);
}
}
return (EFI_STATUS) Status;
--
1.8.3.1
------------------------------------------------------------------------------
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