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PrmPkg: Publish PRM operation region to support PRM ACPI _DSM invocation

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A PRM Handler has a 1-to-1 mapping to the corresponding _DSM method.
The UUID of the _DSM Method will be passed by the ASL code to the
OpRegionHandler which will look up the PRMT Table to extract the
pointer of the corresponding PRM Handler.

PRM loader pre-builds an SSDT that includes this PRM operation region.
In boot time, the PRM loader will load and publish this SSDT, so that
in OS runtime ACPI _DSM can invoke the PRM handler by pass the UUID to
PRM operation region.

The pre-build SSDT also includes a PRMT device as a Sample ACPI _DSM to
invoke PRM handler.

Cc: Andrew Fish <afish@apple.com>
Cc: Kang Gao <kang.gao@intel.com>
Cc: Michael D Kinney <michael.d.kinney@intel.com>
Cc: Michael Kubacki <michael.kubacki@microsoft.com>
Cc: Leif Lindholm <leif@nuviainc.com>
Cc: Benjamin You <benjamin.you@intel.com>
Cc: Liu Yun <yun.y.liu@intel.com>
Cc: Ankit Sinha <ankit.sinha@intel.com>
Cc: Nate DeSimone <nathaniel.l.desimone@intel.com>
Signed-off-by: Liu Yun <yun.y.liu@intel.com>
Acked-by: Michael D Kinney <michael.d.kinney@intel.com>
Acked-by: Liming Gao <gaoliming@byosoft.com.cn>
Acked-by: Leif Lindholm <quic_llindhol@quicinc.com>
Reviewed-by: Ankit Sinha <ankit.sinha@intel.com>
This commit is contained in:
Liu
2020-05-07 14:42:03 +08:00
committed by mergify[bot]
parent a6f8946bc9
commit ef05955996
3 changed files with 125 additions and 0 deletions
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34
PrmPkg/PrmLoaderDxe/PrmLoaderDxe.c
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@@ -3,6 +3,7 @@
This file contains the implementation for a Platform Runtime Mechanism (PRM)
loader driver.
Copyright (c) 2020, Intel Corporation. All rights reserved.<BR>
Copyright (c) Microsoft Corporation
SPDX-License-Identifier: BSD-2-Clause-Patent
@@ -19,6 +20,7 @@
#include <Library/PrmContextBufferLib.h>
#include <Library/UefiBootServicesTableLib.h>
#include <Library/UefiLib.h>
#include <Library/DxeServicesLib.h>
#include <Protocol/AcpiTable.h>
#include <Protocol/LoadedImage.h>
#include <Protocol/PrmConfig.h>
@@ -809,6 +811,8 @@ PublishPrmAcpiTable (
EFI_STATUS Status;
EFI_ACPI_TABLE_PROTOCOL *AcpiTableProtocol;
UINTN TableKey;
EFI_ACPI_DESCRIPTION_HEADER *Ssdt;
UINTN SsdtSize;
if (PrmAcpiDescriptionTable == NULL || PrmAcpiDescriptionTable->Header.Signature != PRM_TABLE_SIGNATURE) {
return EFI_INVALID_PARAMETER;
@@ -832,6 +836,36 @@ PublishPrmAcpiTable (
}
ASSERT_EFI_ERROR (Status);
//
// Load SSDT
//
Status = GetSectionFromFv (
&gEfiCallerIdGuid,
EFI_SECTION_RAW,
0,
(VOID **) &Ssdt,
&SsdtSize
);
ASSERT_EFI_ERROR (Status);
DEBUG ((DEBUG_INFO, "%a %a: SSDT loaded ...\n", _DBGMSGID_, __FUNCTION__));
//
// Update OEM ID
//
CopyMem (&Ssdt->OemId, PcdGetPtr (PcdAcpiDefaultOemId), sizeof (Ssdt->OemId));
//
// Publish the SSDT. Table is re-checksumed.
//
TableKey = 0;
Status = AcpiTableProtocol->InstallAcpiTable (
AcpiTableProtocol,
Ssdt,
SsdtSize,
&TableKey
);
ASSERT_EFI_ERROR (Status);
return Status;
}