ACPICA: FADT verification is now table driven.
Disassembler now verifies an input Signed-off-by: Alexey Starikovskiy <alexey.y.starikovskiy@intel.com> Signed-off-by: Len Brown <len.brown@intel.com>
This commit is contained in:
parent
775d85b6aa
commit
ea5d8ebcbb
3 changed files with 154 additions and 133 deletions
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@ -49,74 +49,92 @@ ACPI_MODULE_NAME("tbfadt")
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/* Local prototypes */
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static void inline
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acpi_tb_init_generic_address(struct acpi_generic_address *new_gas_struct,
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acpi_tb_init_generic_address(struct acpi_generic_address *generic_address,
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u8 bit_width, u64 address);
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static void acpi_tb_fadt_register_error(char *register_name, u32 value);
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/* Table for conversion of FADT to common internal format and FADT validation */
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static void acpi_tb_convert_fadt(void);
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static void acpi_tb_validate_fadt(void);
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/* Table used for conversion of FADT to common format */
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typedef struct acpi_fadt_conversion {
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typedef struct acpi_fadt_info {
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char *name;
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u8 target;
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u8 source;
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u8 length;
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u8 type;
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} acpi_fadt_conversion;
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} acpi_fadt_info;
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static struct acpi_fadt_conversion fadt_conversion_table[] = {
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{ACPI_FADT_OFFSET(xpm1a_event_block),
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#define ACPI_FADT_REQUIRED 1
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#define ACPI_FADT_SEPARATE_LENGTH 2
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static struct acpi_fadt_info fadt_info_table[] = {
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{"Pm1aEventBlock", ACPI_FADT_OFFSET(xpm1a_event_block),
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ACPI_FADT_OFFSET(pm1a_event_block),
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ACPI_FADT_OFFSET(pm1_event_length)},
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{ACPI_FADT_OFFSET(xpm1b_event_block),
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ACPI_FADT_OFFSET(pm1_event_length), ACPI_FADT_REQUIRED},
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{"Pm1bEventBlock", ACPI_FADT_OFFSET(xpm1b_event_block),
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ACPI_FADT_OFFSET(pm1b_event_block),
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ACPI_FADT_OFFSET(pm1_event_length)},
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{ACPI_FADT_OFFSET(xpm1a_control_block),
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ACPI_FADT_OFFSET(pm1_event_length), 0},
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{"Pm1aControlBlock", ACPI_FADT_OFFSET(xpm1a_control_block),
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ACPI_FADT_OFFSET(pm1a_control_block),
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ACPI_FADT_OFFSET(pm1_control_length)},
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{ACPI_FADT_OFFSET(xpm1b_control_block),
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ACPI_FADT_OFFSET(pm1_control_length), ACPI_FADT_REQUIRED},
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{"Pm1bControlBlock", ACPI_FADT_OFFSET(xpm1b_control_block),
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ACPI_FADT_OFFSET(pm1b_control_block),
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ACPI_FADT_OFFSET(pm1_control_length)},
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{ACPI_FADT_OFFSET(xpm2_control_block),
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ACPI_FADT_OFFSET(pm1_control_length), 0},
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{"Pm2ControlBlock", ACPI_FADT_OFFSET(xpm2_control_block),
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ACPI_FADT_OFFSET(pm2_control_block),
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ACPI_FADT_OFFSET(pm2_control_length)},
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{ACPI_FADT_OFFSET(xpm_timer_block), ACPI_FADT_OFFSET(pm_timer_block),
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ACPI_FADT_OFFSET(pm_timer_length)},
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{ACPI_FADT_OFFSET(xgpe0_block), ACPI_FADT_OFFSET(gpe0_block),
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ACPI_FADT_OFFSET(gpe0_block_length)},
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{ACPI_FADT_OFFSET(xgpe1_block), ACPI_FADT_OFFSET(gpe1_block),
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ACPI_FADT_OFFSET(gpe1_block_length)}
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ACPI_FADT_OFFSET(pm2_control_length), ACPI_FADT_SEPARATE_LENGTH},
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{"PmTimerBlock", ACPI_FADT_OFFSET(xpm_timer_block),
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ACPI_FADT_OFFSET(pm_timer_block),
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ACPI_FADT_OFFSET(pm_timer_length), ACPI_FADT_REQUIRED},
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{"Gpe0Block", ACPI_FADT_OFFSET(xgpe0_block),
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ACPI_FADT_OFFSET(gpe0_block),
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ACPI_FADT_OFFSET(gpe0_block_length), ACPI_FADT_SEPARATE_LENGTH},
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{"Gpe1Block", ACPI_FADT_OFFSET(xgpe1_block),
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ACPI_FADT_OFFSET(gpe1_block),
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ACPI_FADT_OFFSET(gpe1_block_length), ACPI_FADT_SEPARATE_LENGTH}
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};
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#define ACPI_FADT_CONVERSION_ENTRIES (sizeof (fadt_conversion_table) / sizeof (struct acpi_fadt_conversion))
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#define ACPI_FADT_INFO_ENTRIES (sizeof (fadt_info_table) / sizeof (struct acpi_fadt_info))
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/*******************************************************************************
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*
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* FUNCTION: acpi_tb_init_generic_address
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*
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* PARAMETERS: new_gas_struct - GAS struct to be initialized
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* PARAMETERS: generic_address - GAS struct to be initialized
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* bit_width - Width of this register
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* Address - Address of the register
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*
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* RETURN: None
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*
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* DESCRIPTION: Initialize a GAS structure.
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* DESCRIPTION: Initialize a Generic Address Structure (GAS)
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* See the ACPI specification for a full description and
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* definition of this structure.
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*
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******************************************************************************/
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static void inline
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acpi_tb_init_generic_address(struct acpi_generic_address *new_gas_struct,
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acpi_tb_init_generic_address(struct acpi_generic_address *generic_address,
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u8 bit_width, u64 address)
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{
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ACPI_MOVE_64_TO_64(&new_gas_struct->address, &address);
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new_gas_struct->space_id = ACPI_ADR_SPACE_SYSTEM_IO;
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new_gas_struct->bit_width = bit_width;
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new_gas_struct->bit_offset = 0;
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new_gas_struct->access_width = 0;
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/*
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* The 64-bit Address field is non-aligned in the byte packed
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* GAS struct.
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*/
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ACPI_MOVE_64_TO_64(&generic_address->address, &address);
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/* All other fields are byte-wide */
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generic_address->space_id = ACPI_ADR_SPACE_SYSTEM_IO;
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generic_address->bit_width = bit_width;
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generic_address->bit_offset = 0;
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generic_address->access_width = 0;
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}
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/*******************************************************************************
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@ -139,8 +157,8 @@ void acpi_tb_parse_fadt(acpi_native_uint table_index, u8 flags)
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struct acpi_table_header *table;
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/*
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* Special case for the FADT because of multiple versions and the fact
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* that it contains pointers to both the DSDT and FACS tables.
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* The FADT has multiple versions with different lengths,
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* and it contains pointers to both the DSDT and FACS tables.
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*
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* Get a local copy of the FADT and convert it to a common format
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* Map entire FADT, assumed to be smaller than one page.
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@ -160,29 +178,41 @@ void acpi_tb_parse_fadt(acpi_native_uint table_index, u8 flags)
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*/
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(void)acpi_tb_verify_checksum(table, length);
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/* Copy the entire FADT locally */
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/*
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* If the FADT is larger than what we know about, we have a problem.
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* Truncate the table, but make some noise.
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*/
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if (length > sizeof(struct acpi_table_fadt)) {
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ACPI_WARNING((AE_INFO,
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"FADT (revision %u) is too large, truncating length 0x%X to 0x%X",
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table->revision, length,
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sizeof(struct acpi_table_fadt)));
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}
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/* Copy the entire FADT locally. Zero first for tb_convert_fadt */
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ACPI_MEMSET(&acpi_gbl_FADT, 0, sizeof(struct acpi_table_fadt));
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ACPI_MEMCPY(&acpi_gbl_FADT, table,
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ACPI_MIN(length, sizeof(struct acpi_table_fadt)));
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/* All done with the real FADT, unmap it */
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acpi_os_unmap_memory(table, length);
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/* Convert local FADT to the common internal format */
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/*
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* 1) Convert the local copy of the FADT to the common internal format
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* 2) Validate some of the important values within the FADT
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*/
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acpi_tb_convert_fadt();
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acpi_tb_validate_fadt(&acpi_gbl_FADT);
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/* Extract the DSDT and FACS tables from the FADT */
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/* Obtain the DSDT and FACS tables via their addresses within the FADT */
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acpi_tb_install_table((acpi_physical_address) acpi_gbl_FADT.Xdsdt,
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flags, ACPI_SIG_DSDT, ACPI_TABLE_INDEX_DSDT);
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acpi_tb_install_table((acpi_physical_address) acpi_gbl_FADT.Xfacs,
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flags, ACPI_SIG_FACS, ACPI_TABLE_INDEX_FACS);
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/* Validate important FADT values */
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acpi_tb_validate_fadt();
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}
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/*******************************************************************************
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@ -194,6 +224,7 @@ void acpi_tb_parse_fadt(acpi_native_uint table_index, u8 flags)
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* RETURN: None
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*
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* DESCRIPTION: Converts all versions of the FADT to a common internal format.
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* -> Expand all 32-bit addresses to 64-bit.
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*
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* NOTE: acpi_gbl_FADT must be of size (struct acpi_table_fadt),
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* and must contain a copy of the actual FADT.
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@ -213,13 +244,17 @@ void acpi_tb_parse_fadt(acpi_native_uint table_index, u8 flags)
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*
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******************************************************************************/
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static void acpi_tb_convert_fadt(void)
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void acpi_tb_convert_fadt(void)
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{
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u8 pm1_register_length;
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struct acpi_generic_address *target;
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acpi_native_uint i;
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/* Expand the FACS and DSDT addresses as necessary */
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/* Update the local FADT table header length */
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acpi_gbl_FADT.header.length = sizeof(struct acpi_table_fadt);
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/* Expand the 32-bit FACS and DSDT addresses to 64-bit as necessary */
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if (!acpi_gbl_FADT.Xfacs) {
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acpi_gbl_FADT.Xfacs = (u64) acpi_gbl_FADT.facs;
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@ -233,10 +268,10 @@ static void acpi_tb_convert_fadt(void)
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* Expand the 32-bit V1.0 addresses to the 64-bit "X" generic address
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* structures as necessary.
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*/
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for (i = 0; i < ACPI_FADT_CONVERSION_ENTRIES; i++) {
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for (i = 0; i < ACPI_FADT_INFO_ENTRIES; i++) {
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target =
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ACPI_ADD_PTR(struct acpi_generic_address, &acpi_gbl_FADT,
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fadt_conversion_table[i].target);
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fadt_info_table[i].target);
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/* Expand only if the X target is null */
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acpi_tb_init_generic_address(target,
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*ACPI_ADD_PTR(u8,
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&acpi_gbl_FADT,
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fadt_conversion_table
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fadt_info_table
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[i].length),
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(u64) * ACPI_ADD_PTR(u32,
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&acpi_gbl_FADT,
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fadt_conversion_table
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fadt_info_table
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[i].
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source));
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}
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*/
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pm1_register_length = (u8) ACPI_DIV_2(acpi_gbl_FADT.pm1_event_length);
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/* PM1A is required */
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/* The PM1A register block is required */
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acpi_tb_init_generic_address(&acpi_gbl_xpm1a_enable,
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pm1_register_length,
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(acpi_gbl_FADT.xpm1a_event_block.address +
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pm1_register_length));
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/* PM1B is optional; leave null if not present */
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/* The PM1B register block is optional, ignore if not present */
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if (acpi_gbl_FADT.xpm1b_event_block.address) {
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acpi_tb_init_generic_address(&acpi_gbl_xpm1b_enable,
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@ -280,102 +315,84 @@ static void acpi_tb_convert_fadt(void)
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(acpi_gbl_FADT.xpm1b_event_block.
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address + pm1_register_length));
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}
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/* Global FADT is the new common V2.0 FADT */
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acpi_gbl_FADT.header.length = sizeof(struct acpi_table_fadt);
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}
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/******************************************************************************
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*
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* FUNCTION: acpi_tb_validate_fadt
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*
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* PARAMETERS: None
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* PARAMETERS: Table - Pointer to the FADT to be validated
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*
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* RETURN: None
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*
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* DESCRIPTION: Validate various ACPI registers in the FADT. For problems,
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* issue a message, but no status is returned.
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* DESCRIPTION: Validate various important fields within the FADT. If a problem
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* is found, issue a message, but no status is returned.
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* Used by both the table manager and the disassembler.
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*
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* Possible additional checks:
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* (acpi_gbl_FADT.pm1_event_length >= 4)
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* (acpi_gbl_FADT.pm1_control_length >= 2)
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* (acpi_gbl_FADT.pm_timer_length >= 4)
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* Gpe block lengths must be multiple of 2
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*
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******************************************************************************/
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static void acpi_tb_validate_fadt(void)
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void acpi_tb_validate_fadt(struct acpi_table_fadt *table)
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{
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u32 *address32;
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struct acpi_generic_address *address64;
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u8 length;
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acpi_native_uint i;
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/* These length fields have a minimum value */
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/* Examine all of the 64-bit extended address fields (X fields) */
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if (acpi_gbl_FADT.pm1_event_length < 4) {
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acpi_tb_fadt_register_error("Pm1EventLength",
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(u32) acpi_gbl_FADT.
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pm1_event_length);
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for (i = 0; i < ACPI_FADT_INFO_ENTRIES; i++) {
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/* Generate pointers to the 32-bit and 64-bit addresses and get the length */
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address64 =
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ACPI_ADD_PTR(struct acpi_generic_address, table,
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fadt_info_table[i].target);
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address32 = ACPI_ADD_PTR(u32, table, fadt_info_table[i].source);
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length = *ACPI_ADD_PTR(u8, table, fadt_info_table[i].length);
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if (fadt_info_table[i].type & ACPI_FADT_REQUIRED) {
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/*
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* Field is required (Pm1a_event, Pm1a_control, pm_timer).
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* Both the address and length must be non-zero.
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*/
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if (!address64->address || !length) {
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ACPI_ERROR((AE_INFO,
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"Required field \"%s\" has zero address and/or length: %8.8X%8.8X/%X",
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fadt_info_table[i].name,
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ACPI_FORMAT_UINT64(address64->
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address),
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length));
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}
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if (acpi_gbl_FADT.pm_timer_length < 4) {
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acpi_tb_fadt_register_error("PmTimerLength",
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(u32) acpi_gbl_FADT.
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pm_timer_length);
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}
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/* These length and address fields must be non-zero */
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if (!acpi_gbl_FADT.pm1_control_length) {
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acpi_tb_fadt_register_error("Pm1ControlLength", 0);
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}
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if (!acpi_gbl_FADT.xpm1a_event_block.address) {
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acpi_tb_fadt_register_error("XPm1aEventBlock.Address", 0);
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}
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if (!acpi_gbl_FADT.xpm1a_control_block.address) {
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acpi_tb_fadt_register_error("XPm1aControlBlock.Address", 0);
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}
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if (!acpi_gbl_FADT.xpm_timer_block.address) {
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acpi_tb_fadt_register_error("XPmTimerBlock.Address", 0);
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}
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/* If PM2 block is present, must have non-zero length */
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if ((acpi_gbl_FADT.xpm2_control_block.address &&
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!acpi_gbl_FADT.pm2_control_length)) {
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acpi_tb_fadt_register_error("Pm2ControlLength",
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(u32) acpi_gbl_FADT.
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pm2_control_length);
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}
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/* Length of any valid GPE blocks must be a multiple of 2 */
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if (acpi_gbl_FADT.xgpe0_block.address &&
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(acpi_gbl_FADT.gpe0_block_length & 1)) {
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acpi_tb_fadt_register_error("Gpe0BlockLength",
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(u32) acpi_gbl_FADT.
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gpe0_block_length);
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}
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if (acpi_gbl_FADT.xgpe1_block.address &&
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(acpi_gbl_FADT.gpe1_block_length & 1)) {
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acpi_tb_fadt_register_error("Gpe1BlockLength",
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(u32) acpi_gbl_FADT.
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gpe1_block_length);
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} else if (fadt_info_table[i].type & ACPI_FADT_SEPARATE_LENGTH) {
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/*
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* Field is optional (PM2Control, GPE0, GPE1) AND has its own
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* length field. If present, both the address and length must be valid.
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*/
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if ((address64->address && !length)
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|| (!address64->address && length)) {
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ACPI_WARNING((AE_INFO,
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"Optional field \"%s\" has zero address or length: %8.8X%8.8X/%X",
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fadt_info_table[i].name,
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ACPI_FORMAT_UINT64(address64->
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address),
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length));
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}
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}
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/*******************************************************************************
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*
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* FUNCTION: acpi_tb_fadt_register_error
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*
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* PARAMETERS: register_name - Pointer to string identifying register
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* Value - Actual register contents value
|
||||
*
|
||||
* RETURN: None
|
||||
*
|
||||
* DESCRIPTION: Display FADT warning message
|
||||
*
|
||||
******************************************************************************/
|
||||
/* If both 32- and 64-bit addresses are valid (non-zero), they must match */
|
||||
|
||||
static void acpi_tb_fadt_register_error(char *register_name, u32 value)
|
||||
{
|
||||
|
||||
ACPI_WARNING((AE_INFO, "Invalid FADT value in field \"%s\" = %X",
|
||||
register_name, value));
|
||||
if (address64->address && *address32 &&
|
||||
(address64->address != (u64) * address32)) {
|
||||
ACPI_ERROR((AE_INFO,
|
||||
"32/64X address mismatch in \"%s\": [%8.8X] [%8.8X%8.8X], using 64X",
|
||||
fadt_info_table[i].name, *address32,
|
||||
ACPI_FORMAT_UINT64(address64->address)));
|
||||
}
|
||||
}
|
||||
}
|
||||
|
|
|
@ -280,7 +280,7 @@ acpi_tb_get_root_table_entry(u8 * table_entry,
|
|||
#if ACPI_MACHINE_WIDTH == 32
|
||||
if (address64 > ACPI_UINT32_MAX) {
|
||||
|
||||
/* Will truncate 64-bit address to 32 bits */
|
||||
/* Will truncate 64-bit address to 32 bits, issue warning */
|
||||
|
||||
ACPI_WARNING((AE_INFO,
|
||||
"64-bit Physical Address in XSDT is too large (%8.8X%8.8X), truncating",
|
||||
|
|
|
@ -51,6 +51,10 @@ acpi_status acpi_allocate_root_table(u32 initial_table_count);
|
|||
*/
|
||||
void acpi_tb_parse_fadt(acpi_native_uint table_index, u8 flags);
|
||||
|
||||
void acpi_tb_convert_fadt(void);
|
||||
|
||||
void acpi_tb_validate_fadt(struct acpi_table_fadt *table);
|
||||
|
||||
/*
|
||||
* tbfind - find ACPI table
|
||||
*/
|
||||
|
|
Reference in a new issue