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ACPICA: Finish support for the CDAT table

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ACPICA commit 8ac4e5116f59d6f9ba2fbeb9ce22ab58237a278f

Finish support for the CDAT table, in both the data table compiler and
the disassembler.

Link: https://github.com/acpica/acpica/commit/8ac4e511
Signed-off-by: Bob Moore <robert.moore@intel.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
This commit is contained in:
Bob Moore 2022-10-27 19:58:36 +02:00 committed by Rafael J. Wysocki
parent 3f062a516a
commit 51aad1a672
13 changed files with 311 additions and 88 deletions
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1
drivers/acpi/acpica/Makefile
View File

@ -155,6 +155,7 @@ acpi-y += \
utalloc.o \
utascii.o \
utbuffer.o \
utcksum.o \
utcopy.o \
utexcep.o \
utdebug.o \

1
drivers/acpi/acpica/acglobal.h
View File

@ -24,6 +24,7 @@ ACPI_GLOBAL(struct acpi_table_list, acpi_gbl_root_table_list);
ACPI_GLOBAL(struct acpi_table_header *, acpi_gbl_DSDT);
ACPI_GLOBAL(struct acpi_table_header, acpi_gbl_original_dsdt_header);
ACPI_INIT_GLOBAL(char *, acpi_gbl_CDAT, NULL);
ACPI_INIT_GLOBAL(u32, acpi_gbl_dsdt_index, ACPI_INVALID_TABLE_INDEX);
ACPI_INIT_GLOBAL(u32, acpi_gbl_facs_index, ACPI_INVALID_TABLE_INDEX);
ACPI_INIT_GLOBAL(u32, acpi_gbl_xfacs_index, ACPI_INVALID_TABLE_INDEX);

5
drivers/acpi/acpica/actables.h
View File

@ -124,11 +124,6 @@ void
acpi_tb_print_table_header(acpi_physical_address address,
struct acpi_table_header *header);
u8 acpi_tb_checksum(u8 *buffer, u32 length);
acpi_status
acpi_tb_verify_checksum(struct acpi_table_header *table, u32 length);
void acpi_tb_check_dsdt_header(void);
struct acpi_table_header *acpi_tb_copy_dsdt(u32 table_index);

13
drivers/acpi/acpica/acutils.h
View File

@ -158,6 +158,19 @@ u8 acpi_ut_valid_name_char(char character, u32 position);
void acpi_ut_check_and_repair_ascii(u8 *name, char *repaired_name, u32 count);
/*
* utcksum - Checksum utilities
*/
u8 acpi_ut_generate_checksum(void *table, u32 length, u8 original_checksum);
u8 acpi_ut_checksum(u8 *buffer, u32 length);
acpi_status
acpi_ut_verify_cdat_checksum(struct acpi_table_cdat *cdat_table, u32 length);
acpi_status
acpi_ut_verify_checksum(struct acpi_table_header *table, u32 length);
/*
* utnonansi - Non-ANSI C library functions
*/

2
drivers/acpi/acpica/tbdata.c
View File

@ -522,7 +522,7 @@ acpi_tb_verify_temp_table(struct acpi_table_desc *table_desc,
/* Verify the checksum */
status =
acpi_tb_verify_checksum(table_desc->pointer,
acpi_ut_verify_checksum(table_desc->pointer,
table_desc->length);
if (ACPI_FAILURE(status)) {
ACPI_EXCEPTION((AE_INFO, AE_NO_MEMORY,

2
drivers/acpi/acpica/tbfadt.c
View File

@ -298,7 +298,7 @@ void acpi_tb_parse_fadt(void)
* Validate the FADT checksum before we copy the table. Ignore
* checksum error as we want to try to get the DSDT and FACS.
*/
(void)acpi_tb_verify_checksum(table, length);
(void)acpi_ut_verify_checksum(table, length);
/* Create a local copy of the FADT in common ACPI 2.0+ format */

77
drivers/acpi/acpica/tbprint.c
View File

@ -10,6 +10,7 @@
#include <acpi/acpi.h>
#include "accommon.h"
#include "actables.h"
#include "acutils.h"
#define _COMPONENT ACPI_TABLES
ACPI_MODULE_NAME("tbprint")
@ -39,7 +40,7 @@ static void acpi_tb_fix_string(char *string, acpi_size length)
{
while (length && *string) {
if (!isprint((int)*string)) {
if (!isprint((int)(u8)*string)) {
*string = '?';
}
@ -135,77 +136,3 @@ acpi_tb_print_table_header(acpi_physical_address address,
local_header.asl_compiler_revision));
}
}
/*******************************************************************************
*
* FUNCTION: acpi_tb_validate_checksum
*
* PARAMETERS: table - ACPI table to verify
* length - Length of entire table
*
* RETURN: Status
*
* DESCRIPTION: Verifies that the table checksums to zero. Optionally returns
* exception on bad checksum.
*
******************************************************************************/
acpi_status acpi_tb_verify_checksum(struct acpi_table_header *table, u32 length)
{
u8 checksum;
/*
* FACS/S3PT:
* They are the odd tables, have no standard ACPI header and no checksum
*/
if (ACPI_COMPARE_NAMESEG(table->signature, ACPI_SIG_S3PT) ||
ACPI_COMPARE_NAMESEG(table->signature, ACPI_SIG_FACS)) {
return (AE_OK);
}
/* Compute the checksum on the table */
checksum = acpi_tb_checksum(ACPI_CAST_PTR(u8, table), length);
/* Checksum ok? (should be zero) */
if (checksum) {
ACPI_BIOS_WARNING((AE_INFO,
"Incorrect checksum in table [%4.4s] - 0x%2.2X, "
"should be 0x%2.2X",
table->signature, table->checksum,
(u8)(table->checksum - checksum)));
#if (ACPI_CHECKSUM_ABORT)
return (AE_BAD_CHECKSUM);
#endif
}
return (AE_OK);
}
/*******************************************************************************
*
* FUNCTION: acpi_tb_checksum
*
* PARAMETERS: buffer - Pointer to memory region to be checked
* length - Length of this memory region
*
* RETURN: Checksum (u8)
*
* DESCRIPTION: Calculates circular checksum of memory region.
*
******************************************************************************/
u8 acpi_tb_checksum(u8 *buffer, u32 length)
{
u8 sum = 0;
u8 *end = buffer + length;
while (buffer < end) {
sum = (u8)(sum + *(buffer++));
}
return (sum);
}

2
drivers/acpi/acpica/tbutils.c
View File

@ -299,7 +299,7 @@ acpi_tb_parse_root_table(acpi_physical_address rsdp_address)
/* Validate the root table checksum */
status = acpi_tb_verify_checksum(table, length);
status = acpi_ut_verify_checksum(table, length);
if (ACPI_FAILURE(status)) {
acpi_os_unmap_memory(table, length);
return_ACPI_STATUS(status);

4
drivers/acpi/acpica/tbxfroot.c
View File

@ -74,14 +74,14 @@ acpi_status acpi_tb_validate_rsdp(struct acpi_table_rsdp *rsdp)
/* Check the standard checksum */
if (acpi_tb_checksum((u8 *) rsdp, ACPI_RSDP_CHECKSUM_LENGTH) != 0) {
if (acpi_ut_checksum((u8 *)rsdp, ACPI_RSDP_CHECKSUM_LENGTH) != 0) {
return (AE_BAD_CHECKSUM);
}
/* Check extended checksum if table version >= 2 */
if ((rsdp->revision >= 2) &&
(acpi_tb_checksum((u8 *) rsdp, ACPI_RSDP_XCHECKSUM_LENGTH) != 0)) {
(acpi_ut_checksum((u8 *)rsdp, ACPI_RSDP_XCHECKSUM_LENGTH) != 0)) {
return (AE_BAD_CHECKSUM);
}

170
drivers/acpi/acpica/utcksum.c Normal file
View File

@ -0,0 +1,170 @@
// SPDX-License-Identifier: BSD-3-Clause OR GPL-2.0
/******************************************************************************
*
* Module Name: utcksum - Support generating table checksums
*
* Copyright (C) 2000 - 2022, Intel Corp.
*
*****************************************************************************/
#include <acpi/acpi.h>
#include "accommon.h"
#include "acutils.h"
/* This module used for application-level code only */
#define _COMPONENT ACPI_CA_DISASSEMBLER
ACPI_MODULE_NAME("utcksum")
/*******************************************************************************
*
* FUNCTION: acpi_ut_verify_checksum
*
* PARAMETERS: table - ACPI table to verify
* length - Length of entire table
*
* RETURN: Status
*
* DESCRIPTION: Verifies that the table checksums to zero. Optionally returns
* exception on bad checksum.
* Note: We don't have to check for a CDAT here, since CDAT is
* not in the RSDT/XSDT, and the CDAT table is never installed
* via ACPICA.
*
******************************************************************************/
acpi_status acpi_ut_verify_checksum(struct acpi_table_header *table, u32 length)
{
u8 checksum;
/*
* FACS/S3PT:
* They are the odd tables, have no standard ACPI header and no checksum
*/
if (ACPI_COMPARE_NAMESEG(table->signature, ACPI_SIG_S3PT) ||
ACPI_COMPARE_NAMESEG(table->signature, ACPI_SIG_FACS)) {
return (AE_OK);
}
/* Compute the checksum on the table */
length = table->length;
checksum =
acpi_ut_generate_checksum(ACPI_CAST_PTR(u8, table), length,
table->checksum);
/* Computed checksum matches table? */
if (checksum != table->checksum) {
ACPI_BIOS_WARNING((AE_INFO,
"Incorrect checksum in table [%4.4s] - 0x%2.2X, "
"should be 0x%2.2X",
table->signature, table->checksum,
table->checksum - checksum));
#if (ACPI_CHECKSUM_ABORT)
return (AE_BAD_CHECKSUM);
#endif
}
return (AE_OK);
}
/*******************************************************************************
*
* FUNCTION: acpi_ut_verify_cdat_checksum
*
* PARAMETERS: table - CDAT ACPI table to verify
* length - Length of entire table
*
* RETURN: Status
*
* DESCRIPTION: Verifies that the CDAT table checksums to zero. Optionally
* returns an exception on bad checksum.
*
******************************************************************************/
acpi_status
acpi_ut_verify_cdat_checksum(struct acpi_table_cdat *cdat_table, u32 length)
{
u8 checksum;
/* Compute the checksum on the table */
checksum = acpi_ut_generate_checksum(ACPI_CAST_PTR(u8, cdat_table),
cdat_table->length,
cdat_table->checksum);
/* Computed checksum matches table? */
if (checksum != cdat_table->checksum) {
ACPI_BIOS_WARNING((AE_INFO,
"Incorrect checksum in table [%4.4s] - 0x%2.2X, "
"should be 0x%2.2X",
acpi_gbl_CDAT, cdat_table->checksum,
checksum));
#if (ACPI_CHECKSUM_ABORT)
return (AE_BAD_CHECKSUM);
#endif
}
cdat_table->checksum = checksum;
return (AE_OK);
}
/*******************************************************************************
*
* FUNCTION: acpi_ut_generate_checksum
*
* PARAMETERS: table - Pointer to table to be checksummed
* length - Length of the table
* original_checksum - Value of the checksum field
*
* RETURN: 8 bit checksum of buffer
*
* DESCRIPTION: Computes an 8 bit checksum of the table.
*
******************************************************************************/
u8 acpi_ut_generate_checksum(void *table, u32 length, u8 original_checksum)
{
u8 checksum;
/* Sum the entire table as-is */
checksum = acpi_ut_checksum((u8 *)table, length);
/* Subtract off the existing checksum value in the table */
checksum = (u8)(checksum - original_checksum);
/* Compute and return the final checksum */
checksum = (u8)(0 - checksum);
return (checksum);
}
/*******************************************************************************
*
* FUNCTION: acpi_ut_checksum
*
* PARAMETERS: buffer - Pointer to memory region to be checked
* length - Length of this memory region
*
* RETURN: Checksum (u8)
*
* DESCRIPTION: Calculates circular checksum of memory region.
*
******************************************************************************/
u8 acpi_ut_checksum(u8 *buffer, u32 length)
{
u8 sum = 0;
u8 *end = buffer + length;
while (buffer < end) {
sum = (u8)(sum + *(buffer++));
}
return (sum);
}

116
include/acpi/actbl1.h
View File

@ -45,6 +45,7 @@
#define ACPI_SIG_HMAT "HMAT" /* Heterogeneous Memory Attributes Table */
#define ACPI_SIG_HPET "HPET" /* High Precision Event Timer table */
#define ACPI_SIG_IBFT "IBFT" /* iSCSI Boot Firmware Table */
#define ACPI_SIG_MSCT "MSCT" /* Maximum System Characteristics Table */
#define ACPI_SIG_S3PT "S3PT" /* S3 Performance (sub)Table */
#define ACPI_SIG_PCCS "PCC" /* PCC Shared Memory Region */
@ -303,12 +304,125 @@ struct acpi_table_boot {
u8 reserved[3];
};
/*******************************************************************************
*
* CDAT - Coherent Device Attribute Table
* Version 1
*
* Conforms to the "Coherent Device Attribute Table (CDAT) Specification
" (Revision 1.01, October 2020.)
*
******************************************************************************/
struct acpi_table_cdat {
u32 length; /* Length of table in bytes, including this header */
u8 revision; /* ACPI Specification minor version number */
u8 checksum; /* To make sum of entire table == 0 */
u8 reserved[6];
u32 sequence; /* Used to detect runtime CDAT table changes */
};
/* CDAT common subtable header */
struct acpi_cdat_header {
u8 type;
u8 reserved;
u16 length;
};
/* Values for Type field above */
enum acpi_cdat_type {
ACPI_CDAT_TYPE_DSMAS = 0,
ACPI_CDAT_TYPE_DSLBIS = 1,
ACPI_CDAT_TYPE_DSMSCIS = 2,
ACPI_CDAT_TYPE_DSIS = 3,
ACPI_CDAT_TYPE_DSEMTS = 4,
ACPI_CDAT_TYPE_SSLBIS = 5,
ACPI_CDAT_TYPE_RESERVED = 6 /* 6 through 0xFF are reserved */
};
/* Subtable 0: Device Scoped Memory Affinity Structure (DSMAS) */
struct acpi_cadt_dsmas {
u8 dsmad_handle;
u8 flags;
u16 reserved;
u64 dpa_base_address;
u64 dpa_length;
};
/* Flags for subtable above */
#define ACPI_CEDT_DSMAS_NON_VOLATILE (1 << 2)
/* Subtable 1: Device scoped Latency and Bandwidth Information Structure (DSLBIS) */
struct acpi_cdat_dslbis {
u8 handle;
u8 flags; /* If Handle matches a DSMAS handle, the definition of this field matches
* Flags field in HMAT System Locality Latency */
u8 data_type;
u8 reserved;
u64 entry_base_unit;
u16 entry[3];
u16 reserved2;
};
/* Subtable 2: Device Scoped Memory Side Cache Information Structure (DSMSCIS) */
struct acpi_cdat_dsmscis {
u8 dsmas_handle;
u8 reserved[3];
u64 side_cache_size;
u32 cache_attributes;
};
/* Subtable 3: Device Scoped Initiator Structure (DSIS) */
struct acpi_cdat_dsis {
u8 flags;
u8 handle;
u16 reserved;
};
/* Flags for above subtable */
#define ACPI_CDAT_DSIS_MEM_ATTACHED (1 << 0)
/* Subtable 4: Device Scoped EFI Memory Type Structure (DSEMTS) */
struct acpi_cdat_dsemts {
u8 dsmas_handle;
u8 memory_type;
u16 reserved;
u64 dpa_offset;
u64 range_length;
};
/* Subtable 5: Switch Scoped Latency and Bandwidth Information Structure (SSLBIS) */
struct acpi_cdat_sslbis {
u8 data_type;
u8 reserved[3];
u64 entry_base_unit;
};
/* Sub-subtable for above, sslbe_entries field */
struct acpi_cdat_sslbe {
u16 portx_id;
u16 porty_id;
u16 latency_or_bandwidth;
u16 reserved;
};
/*******************************************************************************
*
* CEDT - CXL Early Discovery Table
* Version 1
*
* Conforms to the "CXL Early Discovery Table" (CXL 2.0)
* Conforms to the "CXL Early Discovery Table" (CXL 2.0, October 2020)
*
******************************************************************************/

2
include/acpi/actbl2.h
View File

@ -28,6 +28,7 @@
#define ACPI_SIG_APMT "APMT" /* Arm Performance Monitoring Unit table */
#define ACPI_SIG_BDAT "BDAT" /* BIOS Data ACPI Table */
#define ACPI_SIG_CCEL "CCEL" /* CC Event Log Table */
#define ACPI_SIG_CDAT "CDAT" /* Coherent Device Attribute Table */
#define ACPI_SIG_IORT "IORT" /* IO Remapping Table */
#define ACPI_SIG_IVRS "IVRS" /* I/O Virtualization Reporting Structure */
#define ACPI_SIG_LPIT "LPIT" /* Low Power Idle Table */
@ -35,7 +36,6 @@
#define ACPI_SIG_MCFG "MCFG" /* PCI Memory Mapped Configuration table */
#define ACPI_SIG_MCHI "MCHI" /* Management Controller Host Interface table */
#define ACPI_SIG_MPST "MPST" /* Memory Power State Table */
#define ACPI_SIG_MSCT "MSCT" /* Maximum System Characteristics Table */
#define ACPI_SIG_MSDM "MSDM" /* Microsoft Data Management Table */
#define ACPI_SIG_NFIT "NFIT" /* NVDIMM Firmware Interface Table */
#define ACPI_SIG_NHLT "NHLT" /* Non HD Audio Link Table */

4
tools/power/acpi/tools/acpidump/apdump.c
View File

@ -78,7 +78,9 @@ u8 ap_is_valid_checksum(struct acpi_table_header *table)
rsdp = ACPI_CAST_PTR(struct acpi_table_rsdp, table);
status = acpi_tb_validate_rsdp(rsdp);
} else {
status = acpi_tb_verify_checksum(table, table->length);
/* We don't have to check for a CDAT here, since CDAT is not in the RSDT/XSDT */
status = acpi_ut_verify_checksum(table, table->length);
}
if (ACPI_FAILURE(status)) {