kernel_optimize_test/include/linux/dmi.h
Tejun Heo 98e5e1bf72 dump_stack: implement arch-specific hardware description in task dumps
x86 and ia64 can acquire extra hardware identification information
from DMI and print it along with task dumps; however, the usage isn't
consistent.

* x86 show_regs() collects vendor, product and board strings and print
  them out with PID, comm and utsname.  Some of the information is
  printed again later in the same dump.

* warn_slowpath_common() explicitly accesses the DMI board and prints
  it out with "Hardware name:" label.  This applies to both x86 and
  ia64 but is irrelevant on all other archs.

* ia64 doesn't show DMI information on other non-WARN dumps.

This patch introduces arch-specific hardware description used by
dump_stack().  It can be set by calling dump_stack_set_arch_desc()
during boot and, if exists, printed out in a separate line with
"Hardware name:" label.

dmi_set_dump_stack_arch_desc() is added which sets arch-specific
description from DMI data.  It uses dmi_ids_string[] which is set from
dmi_present() used for DMI debug message.  It is superset of the
information x86 show_regs() is using.  The function is called from x86
and ia64 boot code right after dmi_scan_machine().

This makes the explicit DMI handling in warn_slowpath_common()
unnecessary.  Removed.

show_regs() isn't yet converted to use generic debug information
printing and this patch doesn't remove the duplicate DMI handling in
x86 show_regs().  The next patch will unify show_regs() handling and
remove the duplication.

An example WARN dump follows.

 WARNING: at kernel/workqueue.c:4841 init_workqueues+0x35/0x505()
 Modules linked in:
 CPU: 0 PID: 1 Comm: swapper/0 Not tainted 3.9.0-rc1-work+ #3
 Hardware name: empty empty/S3992, BIOS 080011  10/26/2007
  0000000000000009 ffff88007c861e08 ffffffff81c614dc ffff88007c861e48
  ffffffff8108f500 ffffffff82228240 0000000000000040 ffffffff8234a08e
  0000000000000000 0000000000000000 0000000000000000 ffff88007c861e58
 Call Trace:
  [<ffffffff81c614dc>] dump_stack+0x19/0x1b
  [<ffffffff8108f500>] warn_slowpath_common+0x70/0xa0
  [<ffffffff8108f54a>] warn_slowpath_null+0x1a/0x20
  [<ffffffff8234a0c3>] init_workqueues+0x35/0x505
  ...

v2: Use the same string as the debug message from dmi_present() which
    also contains BIOS information.  Move hardware name into its own
    line as warn_slowpath_common() did.  This change was suggested by
    Bjorn Helgaas.

Signed-off-by: Tejun Heo <tj@kernel.org>
Cc: Bjorn Helgaas <bhelgaas@google.com>
Cc: David S. Miller <davem@davemloft.net>
Cc: Fengguang Wu <fengguang.wu@intel.com>
Cc: Heiko Carstens <heiko.carstens@de.ibm.com>
Cc: Jesper Nilsson <jesper.nilsson@axis.com>
Cc: Martin Schwidefsky <schwidefsky@de.ibm.com>
Cc: Mike Frysinger <vapier@gentoo.org>
Cc: Vineet Gupta <vgupta@synopsys.com>
Cc: Sam Ravnborg <sam@ravnborg.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2013-04-30 17:04:02 -07:00

142 lines
3.7 KiB
C

#ifndef __DMI_H__
#define __DMI_H__
#include <linux/list.h>
#include <linux/mod_devicetable.h>
/* enum dmi_field is in mod_devicetable.h */
enum dmi_device_type {
DMI_DEV_TYPE_ANY = 0,
DMI_DEV_TYPE_OTHER,
DMI_DEV_TYPE_UNKNOWN,
DMI_DEV_TYPE_VIDEO,
DMI_DEV_TYPE_SCSI,
DMI_DEV_TYPE_ETHERNET,
DMI_DEV_TYPE_TOKENRING,
DMI_DEV_TYPE_SOUND,
DMI_DEV_TYPE_PATA,
DMI_DEV_TYPE_SATA,
DMI_DEV_TYPE_SAS,
DMI_DEV_TYPE_IPMI = -1,
DMI_DEV_TYPE_OEM_STRING = -2,
DMI_DEV_TYPE_DEV_ONBOARD = -3,
};
enum dmi_entry_type {
DMI_ENTRY_BIOS = 0,
DMI_ENTRY_SYSTEM,
DMI_ENTRY_BASEBOARD,
DMI_ENTRY_CHASSIS,
DMI_ENTRY_PROCESSOR,
DMI_ENTRY_MEM_CONTROLLER,
DMI_ENTRY_MEM_MODULE,
DMI_ENTRY_CACHE,
DMI_ENTRY_PORT_CONNECTOR,
DMI_ENTRY_SYSTEM_SLOT,
DMI_ENTRY_ONBOARD_DEVICE,
DMI_ENTRY_OEMSTRINGS,
DMI_ENTRY_SYSCONF,
DMI_ENTRY_BIOS_LANG,
DMI_ENTRY_GROUP_ASSOC,
DMI_ENTRY_SYSTEM_EVENT_LOG,
DMI_ENTRY_PHYS_MEM_ARRAY,
DMI_ENTRY_MEM_DEVICE,
DMI_ENTRY_32_MEM_ERROR,
DMI_ENTRY_MEM_ARRAY_MAPPED_ADDR,
DMI_ENTRY_MEM_DEV_MAPPED_ADDR,
DMI_ENTRY_BUILTIN_POINTING_DEV,
DMI_ENTRY_PORTABLE_BATTERY,
DMI_ENTRY_SYSTEM_RESET,
DMI_ENTRY_HW_SECURITY,
DMI_ENTRY_SYSTEM_POWER_CONTROLS,
DMI_ENTRY_VOLTAGE_PROBE,
DMI_ENTRY_COOLING_DEV,
DMI_ENTRY_TEMP_PROBE,
DMI_ENTRY_ELECTRICAL_CURRENT_PROBE,
DMI_ENTRY_OOB_REMOTE_ACCESS,
DMI_ENTRY_BIS_ENTRY,
DMI_ENTRY_SYSTEM_BOOT,
DMI_ENTRY_MGMT_DEV,
DMI_ENTRY_MGMT_DEV_COMPONENT,
DMI_ENTRY_MGMT_DEV_THRES,
DMI_ENTRY_MEM_CHANNEL,
DMI_ENTRY_IPMI_DEV,
DMI_ENTRY_SYS_POWER_SUPPLY,
DMI_ENTRY_ADDITIONAL,
DMI_ENTRY_ONBOARD_DEV_EXT,
DMI_ENTRY_MGMT_CONTROLLER_HOST,
DMI_ENTRY_INACTIVE = 126,
DMI_ENTRY_END_OF_TABLE = 127,
};
struct dmi_header {
u8 type;
u8 length;
u16 handle;
};
struct dmi_device {
struct list_head list;
int type;
const char *name;
void *device_data; /* Type specific data */
};
#ifdef CONFIG_DMI
struct dmi_dev_onboard {
struct dmi_device dev;
int instance;
int segment;
int bus;
int devfn;
};
extern int dmi_check_system(const struct dmi_system_id *list);
const struct dmi_system_id *dmi_first_match(const struct dmi_system_id *list);
extern const char * dmi_get_system_info(int field);
extern const struct dmi_device * dmi_find_device(int type, const char *name,
const struct dmi_device *from);
extern void dmi_scan_machine(void);
extern void dmi_set_dump_stack_arch_desc(void);
extern bool dmi_get_date(int field, int *yearp, int *monthp, int *dayp);
extern int dmi_name_in_vendors(const char *str);
extern int dmi_name_in_serial(const char *str);
extern int dmi_available;
extern int dmi_walk(void (*decode)(const struct dmi_header *, void *),
void *private_data);
extern bool dmi_match(enum dmi_field f, const char *str);
#else
static inline int dmi_check_system(const struct dmi_system_id *list) { return 0; }
static inline const char * dmi_get_system_info(int field) { return NULL; }
static inline const struct dmi_device * dmi_find_device(int type, const char *name,
const struct dmi_device *from) { return NULL; }
static inline void dmi_scan_machine(void) { return; }
static inline void dmi_set_dump_stack_arch_desc(void) { }
static inline bool dmi_get_date(int field, int *yearp, int *monthp, int *dayp)
{
if (yearp)
*yearp = 0;
if (monthp)
*monthp = 0;
if (dayp)
*dayp = 0;
return false;
}
static inline int dmi_name_in_vendors(const char *s) { return 0; }
static inline int dmi_name_in_serial(const char *s) { return 0; }
#define dmi_available 0
static inline int dmi_walk(void (*decode)(const struct dmi_header *, void *),
void *private_data) { return -1; }
static inline bool dmi_match(enum dmi_field f, const char *str)
{ return false; }
static inline const struct dmi_system_id *
dmi_first_match(const struct dmi_system_id *list) { return NULL; }
#endif
#endif /* __DMI_H__ */