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The ACPI 6.5 specification introduces the CCEL (CC Event Log) table in section 5.2.34: https://uefi.org/specs/ACPI/6.5/ 05_ACPI_Software_Programming_Model.html#cc-event-log-acpi-table Extend AcpiView with a parser to decode and display CCEL table contents. This allows users to inspect CCEL tables from the UEFI Shell. Signed-off-by: Sami Mujawar <sami.mujawar@arm.com>
127 lines
3.2 KiB
C
127 lines
3.2 KiB
C
/** @file
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CCEL table parser
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Copyright (c) 2025, Arm Limited. All rights reserved.
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SPDX-License-Identifier: BSD-2-Clause-Patent
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@par Reference(s):
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- ACPI 6.5 Specification - 29 Aug 2022
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**/
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#include <IndustryStandard/Acpi.h>
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#include <Library/UefiLib.h>
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#include "AcpiParser.h"
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#include "AcpiTableParser.h"
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#include "AcpiViewConfig.h"
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// Local variables.
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STATIC ACPI_DESCRIPTION_HEADER_INFO AcpiHdrInfo;
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/**
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Print the CC Type.
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@param [in] Format Optional format string for tracing the data.
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@param [in] Ptr Pointer to the start of the buffer.
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@param [in] Length Length of the field.
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**/
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VOID
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EFIAPI
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PrintCcType (
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IN CONST CHAR16 *Format OPTIONAL,
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IN UINT8 *Ptr,
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IN UINT32 Length
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)
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{
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UINT8 CcType;
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CcType = *Ptr;
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switch (CcType) {
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case EFI_ACPI_6_5_CC_TYPE_NONE:
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Print (L"CC Type '%u' - None", CcType);
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break;
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case EFI_ACPI_6_5_CC_TYPE_SEV:
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Print (L"CC Type '%u' - SEV", CcType);
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break;
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case EFI_ACPI_6_5_CC_TYPE_TDX:
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Print (L"CC Type '%u' - TDX", CcType);
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break;
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case EFI_ACPI_6_5_CC_TYPE_APTEE:
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Print (L"CC Type '%u' - APTEE", CcType);
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break;
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case EFI_ACPI_6_5_CC_TYPE_ARMCCA:
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Print (L"CC Type '%u' - Arm CCA", CcType);
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break;
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default:
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Print (L"CC Type '%u' - Unknown", CcType);
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} // switch
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}
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/**
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This function validates CC Type field.
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@param [in] Ptr Pointer to the start of the field data.
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@param [in] Length Length of the field.
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@param [in] Context Pointer to context specific information.
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**/
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VOID
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EFIAPI
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ValidateCcType (
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IN UINT8 *Ptr,
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IN UINT32 Length,
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IN VOID *Context
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)
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{
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UINT8 CcType;
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CcType = *Ptr;
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if (CcType > EFI_ACPI_6_5_CC_TYPE_ARMCCA) {
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IncrementErrorCount ();
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Print (L"\nERROR : Invalid/Unknown CC Type - %u.\n", CcType);
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}
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}
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/**
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An ACPI_PARSER array describing the ACPI CCEL Table.
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**/
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STATIC CONST ACPI_PARSER CcelParser[] = {
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PARSE_ACPI_HEADER (&AcpiHdrInfo),
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{ L"CC Type", 1, 36, L"%d", NULL, NULL, NULL, NULL },
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{ L"CC Subtype", 1, 37, L"%d", PrintCcType, NULL, ValidateCcType, NULL },
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{ L"Reserved", 2, 38, NULL, DumpReserved, NULL, ValidateReserved, NULL },
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{ L"Log Area Minimum Length (LAML)",8, 40, L"0x%lx", NULL, NULL, NULL, NULL },
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{ L"Log Area Start Address (LASA)",8, 48, L"0x%lx", NULL, NULL, NULL, NULL }
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};
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/**
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This function parses the ACPI CCEL table.
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When trace is enabled this function parses the CCEL table and
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traces the ACPI table fields.
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@param [in] Trace If TRUE, trace the ACPI fields.
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@param [in] Ptr Pointer to the start of the buffer.
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@param [in] AcpiTableLength Length of the ACPI table.
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@param [in] AcpiTableRevision Revision of the ACPI table.
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**/
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VOID
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EFIAPI
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ParseAcpiCcel (
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IN BOOLEAN Trace,
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IN UINT8 *Ptr,
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IN UINT32 AcpiTableLength,
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IN UINT8 AcpiTableRevision
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)
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{
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if (!Trace) {
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return;
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}
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ParseAcpi (
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TRUE,
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0,
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"CCEL",
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Ptr,
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AcpiTableLength,
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PARSER_PARAMS (CcelParser)
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);
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}
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