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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:
Bob Moore 2007-02-02 19:48:20 +03:00 committed by Len Brown
parent 775d85b6aa
commit ea5d8ebcbb
3 changed files with 154 additions and 133 deletions
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281
drivers/acpi/tables/tbfadt.c
View File

@ -49,74 +49,92 @@ ACPI_MODULE_NAME("tbfadt")
/* Local prototypes */
static void inline
acpi_tb_init_generic_address(struct acpi_generic_address *new_gas_struct,
acpi_tb_init_generic_address(struct acpi_generic_address *generic_address,
u8 bit_width, u64 address);
static void acpi_tb_fadt_register_error(char *register_name, u32 value);
/* Table for conversion of FADT to common internal format and FADT validation */
static void acpi_tb_convert_fadt(void);
static void acpi_tb_validate_fadt(void);
/* Table used for conversion of FADT to common format */
typedef struct acpi_fadt_conversion {
typedef struct acpi_fadt_info {
char *name;
u8 target;
u8 source;
u8 length;
u8 type;
} acpi_fadt_conversion;
} acpi_fadt_info;
static struct acpi_fadt_conversion fadt_conversion_table[] = {
{ACPI_FADT_OFFSET(xpm1a_event_block),
#define ACPI_FADT_REQUIRED 1
#define ACPI_FADT_SEPARATE_LENGTH 2
static struct acpi_fadt_info fadt_info_table[] = {
{"Pm1aEventBlock", ACPI_FADT_OFFSET(xpm1a_event_block),
ACPI_FADT_OFFSET(pm1a_event_block),
ACPI_FADT_OFFSET(pm1_event_length)},
{ACPI_FADT_OFFSET(xpm1b_event_block),
ACPI_FADT_OFFSET(pm1_event_length), ACPI_FADT_REQUIRED},
{"Pm1bEventBlock", ACPI_FADT_OFFSET(xpm1b_event_block),
ACPI_FADT_OFFSET(pm1b_event_block),
ACPI_FADT_OFFSET(pm1_event_length)},
{ACPI_FADT_OFFSET(xpm1a_control_block),
ACPI_FADT_OFFSET(pm1_event_length), 0},
{"Pm1aControlBlock", ACPI_FADT_OFFSET(xpm1a_control_block),
ACPI_FADT_OFFSET(pm1a_control_block),
ACPI_FADT_OFFSET(pm1_control_length)},
{ACPI_FADT_OFFSET(xpm1b_control_block),
ACPI_FADT_OFFSET(pm1_control_length), ACPI_FADT_REQUIRED},
{"Pm1bControlBlock", ACPI_FADT_OFFSET(xpm1b_control_block),
ACPI_FADT_OFFSET(pm1b_control_block),
ACPI_FADT_OFFSET(pm1_control_length)},
{ACPI_FADT_OFFSET(xpm2_control_block),
ACPI_FADT_OFFSET(pm1_control_length), 0},
{"Pm2ControlBlock", ACPI_FADT_OFFSET(xpm2_control_block),
ACPI_FADT_OFFSET(pm2_control_block),
ACPI_FADT_OFFSET(pm2_control_length)},
{ACPI_FADT_OFFSET(xpm_timer_block), ACPI_FADT_OFFSET(pm_timer_block),
ACPI_FADT_OFFSET(pm_timer_length)},
{ACPI_FADT_OFFSET(xgpe0_block), ACPI_FADT_OFFSET(gpe0_block),
ACPI_FADT_OFFSET(gpe0_block_length)},
{ACPI_FADT_OFFSET(xgpe1_block), ACPI_FADT_OFFSET(gpe1_block),
ACPI_FADT_OFFSET(gpe1_block_length)}
ACPI_FADT_OFFSET(pm2_control_length), ACPI_FADT_SEPARATE_LENGTH},
{"PmTimerBlock", ACPI_FADT_OFFSET(xpm_timer_block),
ACPI_FADT_OFFSET(pm_timer_block),
ACPI_FADT_OFFSET(pm_timer_length), ACPI_FADT_REQUIRED},
{"Gpe0Block", ACPI_FADT_OFFSET(xgpe0_block),
ACPI_FADT_OFFSET(gpe0_block),
ACPI_FADT_OFFSET(gpe0_block_length), ACPI_FADT_SEPARATE_LENGTH},
{"Gpe1Block", ACPI_FADT_OFFSET(xgpe1_block),
ACPI_FADT_OFFSET(gpe1_block),
ACPI_FADT_OFFSET(gpe1_block_length), ACPI_FADT_SEPARATE_LENGTH}
};
#define ACPI_FADT_CONVERSION_ENTRIES (sizeof (fadt_conversion_table) / sizeof (struct acpi_fadt_conversion))
#define ACPI_FADT_INFO_ENTRIES (sizeof (fadt_info_table) / sizeof (struct acpi_fadt_info))
/*******************************************************************************
*
* FUNCTION: acpi_tb_init_generic_address
*
* PARAMETERS: new_gas_struct - GAS struct to be initialized
* PARAMETERS: generic_address - GAS struct to be initialized
* bit_width - Width of this register
* Address - Address of the register
*
* RETURN: None
*
* DESCRIPTION: Initialize a GAS structure.
* DESCRIPTION: Initialize a Generic Address Structure (GAS)
* See the ACPI specification for a full description and
* definition of this structure.
*
******************************************************************************/
static void inline
acpi_tb_init_generic_address(struct acpi_generic_address *new_gas_struct,
acpi_tb_init_generic_address(struct acpi_generic_address *generic_address,
u8 bit_width, u64 address)
{
ACPI_MOVE_64_TO_64(&new_gas_struct->address, &address);
new_gas_struct->space_id = ACPI_ADR_SPACE_SYSTEM_IO;
new_gas_struct->bit_width = bit_width;
new_gas_struct->bit_offset = 0;
new_gas_struct->access_width = 0;
/*
* The 64-bit Address field is non-aligned in the byte packed
* GAS struct.
*/
ACPI_MOVE_64_TO_64(&generic_address->address, &address);
/* All other fields are byte-wide */
generic_address->space_id = ACPI_ADR_SPACE_SYSTEM_IO;
generic_address->bit_width = bit_width;
generic_address->bit_offset = 0;
generic_address->access_width = 0;
}
/*******************************************************************************
@ -139,8 +157,8 @@ void acpi_tb_parse_fadt(acpi_native_uint table_index, u8 flags)
struct acpi_table_header *table;
/*
* Special case for the FADT because of multiple versions and the fact
* that it contains pointers to both the DSDT and FACS tables.
* The FADT has multiple versions with different lengths,
* and it contains pointers to both the DSDT and FACS tables.
*
* Get a local copy of the FADT and convert it to a common format
* Map entire FADT, assumed to be smaller than one page.
@ -160,29 +178,41 @@ void acpi_tb_parse_fadt(acpi_native_uint table_index, u8 flags)
*/
(void)acpi_tb_verify_checksum(table, length);
/* Copy the entire FADT locally */
/*
* If the FADT is larger than what we know about, we have a problem.
* Truncate the table, but make some noise.
*/
if (length > sizeof(struct acpi_table_fadt)) {
ACPI_WARNING((AE_INFO,
"FADT (revision %u) is too large, truncating length 0x%X to 0x%X",
table->revision, length,
sizeof(struct acpi_table_fadt)));
}
/* Copy the entire FADT locally. Zero first for tb_convert_fadt */
ACPI_MEMSET(&acpi_gbl_FADT, 0, sizeof(struct acpi_table_fadt));
ACPI_MEMCPY(&acpi_gbl_FADT, table,
ACPI_MIN(length, sizeof(struct acpi_table_fadt)));
/* All done with the real FADT, unmap it */
acpi_os_unmap_memory(table, length);
/* Convert local FADT to the common internal format */
/*
* 1) Convert the local copy of the FADT to the common internal format
* 2) Validate some of the important values within the FADT
*/
acpi_tb_convert_fadt();
acpi_tb_validate_fadt(&acpi_gbl_FADT);
/* Extract the DSDT and FACS tables from the FADT */
/* Obtain the DSDT and FACS tables via their addresses within the FADT */
acpi_tb_install_table((acpi_physical_address) acpi_gbl_FADT.Xdsdt,
flags, ACPI_SIG_DSDT, ACPI_TABLE_INDEX_DSDT);
acpi_tb_install_table((acpi_physical_address) acpi_gbl_FADT.Xfacs,
flags, ACPI_SIG_FACS, ACPI_TABLE_INDEX_FACS);
/* Validate important FADT values */
acpi_tb_validate_fadt();
}
/*******************************************************************************
@ -194,6 +224,7 @@ void acpi_tb_parse_fadt(acpi_native_uint table_index, u8 flags)
* RETURN: None
*
* DESCRIPTION: Converts all versions of the FADT to a common internal format.
* -> Expand all 32-bit addresses to 64-bit.
*
* NOTE: acpi_gbl_FADT must be of size (struct acpi_table_fadt),
* and must contain a copy of the actual FADT.
@ -213,13 +244,17 @@ void acpi_tb_parse_fadt(acpi_native_uint table_index, u8 flags)
*
******************************************************************************/
static void acpi_tb_convert_fadt(void)
void acpi_tb_convert_fadt(void)
{
u8 pm1_register_length;
struct acpi_generic_address *target;
acpi_native_uint i;
/* Expand the FACS and DSDT addresses as necessary */
/* Update the local FADT table header length */
acpi_gbl_FADT.header.length = sizeof(struct acpi_table_fadt);
/* Expand the 32-bit FACS and DSDT addresses to 64-bit as necessary */
if (!acpi_gbl_FADT.Xfacs) {
acpi_gbl_FADT.Xfacs = (u64) acpi_gbl_FADT.facs;
@ -233,10 +268,10 @@ static void acpi_tb_convert_fadt(void)
* Expand the 32-bit V1.0 addresses to the 64-bit "X" generic address
* structures as necessary.
*/
for (i = 0; i < ACPI_FADT_CONVERSION_ENTRIES; i++) {
for (i = 0; i < ACPI_FADT_INFO_ENTRIES; i++) {
target =
ACPI_ADD_PTR(struct acpi_generic_address, &acpi_gbl_FADT,
fadt_conversion_table[i].target);
fadt_info_table[i].target);
/* Expand only if the X target is null */
@ -244,11 +279,11 @@ static void acpi_tb_convert_fadt(void)
acpi_tb_init_generic_address(target,
*ACPI_ADD_PTR(u8,
&acpi_gbl_FADT,
fadt_conversion_table
fadt_info_table
[i].length),
(u64) * ACPI_ADD_PTR(u32,
&acpi_gbl_FADT,
fadt_conversion_table
fadt_info_table
[i].
source));
}
@ -265,14 +300,14 @@ static void acpi_tb_convert_fadt(void)
*/
pm1_register_length = (u8) ACPI_DIV_2(acpi_gbl_FADT.pm1_event_length);
/* PM1A is required */
/* The PM1A register block is required */
acpi_tb_init_generic_address(&acpi_gbl_xpm1a_enable,
pm1_register_length,
(acpi_gbl_FADT.xpm1a_event_block.address +
pm1_register_length));
/* PM1B is optional; leave null if not present */
/* The PM1B register block is optional, ignore if not present */
if (acpi_gbl_FADT.xpm1b_event_block.address) {
acpi_tb_init_generic_address(&acpi_gbl_xpm1b_enable,
@ -280,102 +315,84 @@ static void acpi_tb_convert_fadt(void)
(acpi_gbl_FADT.xpm1b_event_block.
address + pm1_register_length));
}
/* Global FADT is the new common V2.0 FADT */
acpi_gbl_FADT.header.length = sizeof(struct acpi_table_fadt);
}
/******************************************************************************
*
* FUNCTION: acpi_tb_validate_fadt
*
* PARAMETERS: None
* PARAMETERS: Table - Pointer to the FADT to be validated
*
* RETURN: None
*
* DESCRIPTION: Validate various ACPI registers in the FADT. For problems,
* issue a message, but no status is returned.
* DESCRIPTION: Validate various important fields within the FADT. If a problem
* is found, issue a message, but no status is returned.
* Used by both the table manager and the disassembler.
*
* Possible additional checks:
* (acpi_gbl_FADT.pm1_event_length >= 4)
* (acpi_gbl_FADT.pm1_control_length >= 2)
* (acpi_gbl_FADT.pm_timer_length >= 4)
* Gpe block lengths must be multiple of 2
*
******************************************************************************/
static void acpi_tb_validate_fadt(void)
void acpi_tb_validate_fadt(struct acpi_table_fadt *table)
{
u32 *address32;
struct acpi_generic_address *address64;
u8 length;
acpi_native_uint i;
/* These length fields have a minimum value */
/* Examine all of the 64-bit extended address fields (X fields) */
if (acpi_gbl_FADT.pm1_event_length < 4) {
acpi_tb_fadt_register_error("Pm1EventLength",
(u32) acpi_gbl_FADT.
pm1_event_length);
}
for (i = 0; i < ACPI_FADT_INFO_ENTRIES; i++) {
if (acpi_gbl_FADT.pm_timer_length < 4) {
acpi_tb_fadt_register_error("PmTimerLength",
(u32) acpi_gbl_FADT.
pm_timer_length);
}
/* Generate pointers to the 32-bit and 64-bit addresses and get the length */
/* These length and address fields must be non-zero */
address64 =
ACPI_ADD_PTR(struct acpi_generic_address, table,
fadt_info_table[i].target);
address32 = ACPI_ADD_PTR(u32, table, fadt_info_table[i].source);
length = *ACPI_ADD_PTR(u8, table, fadt_info_table[i].length);
if (!acpi_gbl_FADT.pm1_control_length) {
acpi_tb_fadt_register_error("Pm1ControlLength", 0);
}
if (fadt_info_table[i].type & ACPI_FADT_REQUIRED) {
/*
* Field is required (Pm1a_event, Pm1a_control, pm_timer).
* Both the address and length must be non-zero.
*/
if (!address64->address || !length) {
ACPI_ERROR((AE_INFO,
"Required field \"%s\" has zero address and/or length: %8.8X%8.8X/%X",
fadt_info_table[i].name,
ACPI_FORMAT_UINT64(address64->
address),
length));
}
} else if (fadt_info_table[i].type & ACPI_FADT_SEPARATE_LENGTH) {
/*
* Field is optional (PM2Control, GPE0, GPE1) AND has its own
* length field. If present, both the address and length must be valid.
*/
if ((address64->address && !length)
|| (!address64->address && length)) {
ACPI_WARNING((AE_INFO,
"Optional field \"%s\" has zero address or length: %8.8X%8.8X/%X",
fadt_info_table[i].name,
ACPI_FORMAT_UINT64(address64->
address),
length));
}
}
if (!acpi_gbl_FADT.xpm1a_event_block.address) {
acpi_tb_fadt_register_error("XPm1aEventBlock.Address", 0);
}
/* If both 32- and 64-bit addresses are valid (non-zero), they must match */
if (!acpi_gbl_FADT.xpm1a_control_block.address) {
acpi_tb_fadt_register_error("XPm1aControlBlock.Address", 0);
}
if (!acpi_gbl_FADT.xpm_timer_block.address) {
acpi_tb_fadt_register_error("XPmTimerBlock.Address", 0);
}
/* If PM2 block is present, must have non-zero length */
if ((acpi_gbl_FADT.xpm2_control_block.address &&
!acpi_gbl_FADT.pm2_control_length)) {
acpi_tb_fadt_register_error("Pm2ControlLength",
(u32) acpi_gbl_FADT.
pm2_control_length);
}
/* Length of any valid GPE blocks must be a multiple of 2 */
if (acpi_gbl_FADT.xgpe0_block.address &&
(acpi_gbl_FADT.gpe0_block_length & 1)) {
acpi_tb_fadt_register_error("Gpe0BlockLength",
(u32) acpi_gbl_FADT.
gpe0_block_length);
}
if (acpi_gbl_FADT.xgpe1_block.address &&
(acpi_gbl_FADT.gpe1_block_length & 1)) {
acpi_tb_fadt_register_error("Gpe1BlockLength",
(u32) acpi_gbl_FADT.
gpe1_block_length);
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)));
}
}
}
/*******************************************************************************
*
* FUNCTION: acpi_tb_fadt_register_error
*
* PARAMETERS: register_name - Pointer to string identifying register
* Value - Actual register contents value
*
* RETURN: None
*
* DESCRIPTION: Display FADT warning message
*
******************************************************************************/
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));
}

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

@ -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",

4
include/acpi/actables.h
View File

@ -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
*/