AuxXxilium/linux_dsm_epyc7002
1
0
Fork 0
mirror of https://github.com/AuxXxilium/linux_dsm_epyc7002.git synced 2024-11-24 22:40:53 +07:00
Code Issues Actions Packages Projects Releases Wiki Activity

ACPI / tables: Add acpi_subtable_proc to ACPI table parsers

Browse Source 
ACPI subtable parsing needs to be extended to allow two or more
handlers to be run in the same ACPI table walk, thus adding
acpi_subtable_proc structure which stores
 () ACPI table id
 () handler that processes table
 () counter how many items has been processed
and passing it to acpi_parse_entries_array() and
acpi_table_parse_entries_array().

This is needed to fix CPU enumeration when APIC/X2APIC entries
are interleaved.

Signed-off-by: Lukasz Anaczkowski <lukasz.anaczkowski@intel.com>
Reviewed-by: Marc Zyngier <marc.zyngier@arm.com>
Tested-by: Marc Zyngier <marc.zyngier@arm.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
This commit is contained in:
Lukasz Anaczkowski 2015-09-09 15:47:28 +02:00 committed by Rafael J. Wysocki
parent 6ff33f3902
commit 9b3fedde27
2 changed files with 91 additions and 21 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

93
drivers/acpi/tables.c
View File

@ -210,20 +210,39 @@ void acpi_table_print_madt_entry(struct acpi_subtable_header *header)
}
}
int __init
acpi_parse_entries(char *id, unsigned long table_size,
acpi_tbl_entry_handler handler,
/**
* acpi_parse_entries_array - for each proc_num find a suitable subtable
*
* @id: table id (for debugging purposes)
* @table_size: single entry size
* @table_header: where does the table start?
* @proc: array of acpi_subtable_proc struct containing entry id
* and associated handler with it
* @proc_num: how big proc is?
* @max_entries: how many entries can we process?
*
* For each proc_num find a subtable with proc->id and run proc->handler
* on it. Assumption is that there's only single handler for particular
* entry id.
*
* On success returns sum of all matching entries for all proc handlers.
* Otherwise, -ENODEV or -EINVAL is returned.
*/
static int __init
acpi_parse_entries_array(char *id, unsigned long table_size,
struct acpi_table_header *table_header,
int entry_id, unsigned int max_entries)
struct acpi_subtable_proc *proc, int proc_num,
unsigned int max_entries)
{
struct acpi_subtable_header *entry;
int count = 0;
unsigned long table_end;
int count = 0;
int i;
if (acpi_disabled)
return -ENODEV;
if (!id || !handler)
if (!id)
return -EINVAL;
if (!table_size)
@ -243,20 +262,27 @@ acpi_parse_entries(char *id, unsigned long table_size,
while (((unsigned long)entry) + sizeof(struct acpi_subtable_header) <
table_end) {
if (entry->type == entry_id
&& (!max_entries || count < max_entries)) {
if (handler(entry, table_end))
if (max_entries && count >= max_entries)
break;
for (i = 0; i < proc_num; i++) {
if (entry->type != proc[i].id)
continue;
if (!proc->handler || proc[i].handler(entry, table_end))
return -EINVAL;
count++;
proc->count++;
break;
}
if (i != proc_num)
count++;
/*
* If entry->length is 0, break from this loop to avoid
* infinite loop.
*/
if (entry->length == 0) {
pr_err("[%4.4s:0x%02x] Invalid zero length\n", id, entry_id);
pr_err("[%4.4s:0x%02x] Invalid zero length\n", id, proc->id);
return -EINVAL;
}
@ -266,17 +292,32 @@ acpi_parse_entries(char *id, unsigned long table_size,
if (max_entries && count > max_entries) {
pr_warn("[%4.4s:0x%02x] ignored %i entries of %i found\n",
id, entry_id, count - max_entries, count);
id, proc->id, count - max_entries, count);
}
return count;
}
int __init
acpi_table_parse_entries(char *id,
acpi_parse_entries(char *id,
unsigned long table_size,
acpi_tbl_entry_handler handler,
struct acpi_table_header *table_header,
int entry_id, unsigned int max_entries)
{
struct acpi_subtable_proc proc = {
.id = entry_id,
.handler = handler,
};
return acpi_parse_entries_array(id, table_size, table_header,
&proc, 1, max_entries);
}
int __init
acpi_table_parse_entries_array(char *id,
unsigned long table_size,
int entry_id,
acpi_tbl_entry_handler handler,
struct acpi_subtable_proc *proc, int proc_num,
unsigned int max_entries)
{
struct acpi_table_header *table_header = NULL;
@ -287,7 +328,7 @@ acpi_table_parse_entries(char *id,
if (acpi_disabled)
return -ENODEV;
if (!id || !handler)
if (!id)
return -EINVAL;
if (!strncmp(id, ACPI_SIG_MADT, 4))
@ -299,13 +340,29 @@ acpi_table_parse_entries(char *id,
return -ENODEV;
}
count = acpi_parse_entries(id, table_size, handler, table_header,
entry_id, max_entries);
count = acpi_parse_entries_array(id, table_size, table_header,
proc, proc_num, max_entries);
early_acpi_os_unmap_memory((char *)table_header, tbl_size);
return count;
}
int __init
acpi_table_parse_entries(char *id,
unsigned long table_size,
int entry_id,
acpi_tbl_entry_handler handler,
unsigned int max_entries)
{
struct acpi_subtable_proc proc = {
.id = entry_id,
.handler = handler,
};
return acpi_table_parse_entries_array(id, table_size, &proc, 1,
max_entries);
}
int __init
acpi_table_parse_madt(enum acpi_madt_type id,
acpi_tbl_entry_handler handler, unsigned int max_entries)

19
include/linux/acpi.h
View File

@ -131,6 +131,12 @@ static inline void acpi_initrd_override(void *data, size_t size)
(!entry) || (unsigned long)entry + sizeof(*entry) > end || \
((struct acpi_subtable_header *)entry)->length < sizeof(*entry))
struct acpi_subtable_proc {
int id;
acpi_tbl_entry_handler handler;
int count;
};
char * __acpi_map_table (unsigned long phys_addr, unsigned long size);
void __acpi_unmap_table(char *map, unsigned long size);
int early_acpi_boot_init(void);
@ -146,9 +152,16 @@ int __init acpi_parse_entries(char *id, unsigned long table_size,
struct acpi_table_header *table_header,
int entry_id, unsigned int max_entries);
int __init acpi_table_parse_entries(char *id, unsigned long table_size,
int entry_id,
acpi_tbl_entry_handler handler,
unsigned int max_entries);
int entry_id,
acpi_tbl_entry_handler handler,
unsigned int max_entries);
int __init acpi_table_parse_entries(char *id, unsigned long table_size,
int entry_id,
acpi_tbl_entry_handler handler,
unsigned int max_entries);
int __init acpi_table_parse_entries_array(char *id, unsigned long table_size,
struct acpi_subtable_proc *proc, int proc_num,
unsigned int max_entries);
int acpi_table_parse_madt(enum acpi_madt_type id,
acpi_tbl_entry_handler handler,
unsigned int max_entries);