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watchdog: hpwdt (12/12): Make NMI decoding a compile-time option 

hpwdt is quite functional without the NMI decoding feature.
This change lets users disable the NMI portion at compile-time
via the new HPWDT_NMI_DECODING config option.

Signed-off-by: dann frazier <dannf@hp.com>
Acked-by: Thomas Mingarelli <Thomas.Mingarelli@hp.com>
Signed-off-by: Wim Van Sebroeck <wim@iguana.be>
hifive-unleashed-5.1
dann frazier 2010-07-27 17:51:02 -06:00 committed by Wim Van Sebroeck
parent 2ec7ed67dc
commit 86ded1f35d
2 changed files with 37 additions and 7 deletions
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17
drivers/watchdog/Kconfig
View File

@ -578,12 +578,17 @@ config HP_WATCHDOG
depends on X86
help
A software monitoring watchdog and NMI sourcing driver. This driver
will detect lockups and provide a stack trace. Also, when an NMI
occurs this driver will make the necessary BIOS calls to log
the cause of the NMI. This is a driver that will only load on a
HP ProLiant system with a minimum of iLO2 support.
To compile this driver as a module, choose M here: the
module will be called hpwdt.
will detect lockups and provide a stack trace. This is a driver that
will only load on a HP ProLiant system with a minimum of iLO2 support.
To compile this driver as a module, choose M here: the module will be
called hpwdt.
config HPWDT_NMI_DECODING
bool "NMI decoding support for the HP ProLiant iLO2+ Hardware Watchdog Timer"
depends on HP_WATCHDOG
help
When an NMI occurs this feature will make the necessary BIOS calls to
log the cause of the NMI.
config SC1200_WDT
tristate "National Semiconductor PC87307/PC97307 (ala SC1200) Watchdog"

27
drivers/watchdog/hpwdt.c
View File

@ -27,14 +27,16 @@
#include <linux/types.h>
#include <linux/uaccess.h>
#include <linux/watchdog.h>
#ifdef CONFIG_HPWDT_NMI_DECODING
#include <linux/dmi.h>
#include <linux/spinlock.h>
#include <linux/nmi.h>
#include <linux/kdebug.h>
#include <linux/notifier.h>
#include <asm/cacheflush.h>
#endif /* CONFIG_HPWDT_NMI_DECODING */
#define HPWDT_VERSION "1.1.1"
#define HPWDT_VERSION "1.2.0"
#define SECS_TO_TICKS(secs) ((secs) * 1000 / 128)
#define TICKS_TO_SECS(ticks) ((ticks) * 128 / 1000)
#define HPWDT_MAX_TIMER TICKS_TO_SECS(65535)
@ -57,6 +59,7 @@ static struct pci_device_id hpwdt_devices[] = {
};
MODULE_DEVICE_TABLE(pci, hpwdt_devices);
#ifdef CONFIG_HPWDT_NMI_DECODING
#define PCI_BIOS32_SD_VALUE 0x5F32335F /* "_32_" */
#define CRU_BIOS_SIGNATURE_VALUE 0x55524324
#define PCI_BIOS32_PARAGRAPH_LEN 16
@ -407,6 +410,7 @@ static int __devinit detect_cru_service(void)
}
/* ------------------------------------------------------------------------- */
#endif /* CONFIG_X86_64 */
#endif /* CONFIG_HPWDT_NMI_DECODING */
/*
* Watchdog operations
@ -455,6 +459,7 @@ static int hpwdt_time_left(void)
return TICKS_TO_SECS(ioread16(hpwdt_timer_reg));
}
#ifdef CONFIG_HPWDT_NMI_DECODING
/*
* NMI Handler
*/
@ -487,6 +492,7 @@ static int hpwdt_pretimeout(struct notifier_block *nb, unsigned long ulReason,
out:
return NOTIFY_OK;
}
#endif /* CONFIG_HPWDT_NMI_DECODING */
/*
* /dev/watchdog handling
@ -624,15 +630,18 @@ static struct miscdevice hpwdt_miscdev = {
.fops = &hpwdt_fops,
};
#ifdef CONFIG_HPWDT_NMI_DECODING
static struct notifier_block die_notifier = {
.notifier_call = hpwdt_pretimeout,
.priority = 0,
};
#endif /* CONFIG_HPWDT_NMI_DECODING */
/*
* Init & Exit
*/
#ifdef CONFIG_HPWDT_NMI_DECODING
#ifdef ARCH_HAS_NMI_WATCHDOG
static void __devinit hpwdt_check_nmi_decoding(struct pci_dev *dev)
{
@ -712,6 +721,20 @@ static void __devexit hpwdt_exit_nmi_decoding(void)
if (cru_rom_addr)
iounmap(cru_rom_addr);
}
#else /* !CONFIG_HPWDT_NMI_DECODING */
static void __devinit hpwdt_check_nmi_decoding(struct pci_dev *dev)
{
}
static int __devinit hpwdt_init_nmi_decoding(struct pci_dev *dev)
{
return 0;
}
static void __devexit hpwdt_exit_nmi_decoding(void)
{
}
#endif /* CONFIG_HPWDT_NMI_DECODING */
static int __devinit hpwdt_init_one(struct pci_dev *dev,
const struct pci_device_id *ent)
@ -823,12 +846,14 @@ module_param(nowayout, int, 0);
MODULE_PARM_DESC(nowayout, "Watchdog cannot be stopped once started (default="
__MODULE_STRING(WATCHDOG_NOWAYOUT) ")");
#ifdef CONFIG_HPWDT_NMI_DECODING
module_param(allow_kdump, int, 0);
MODULE_PARM_DESC(allow_kdump, "Start a kernel dump after NMI occurs");
module_param(priority, int, 0);
MODULE_PARM_DESC(priority, "The hpwdt driver handles NMIs first or last"
" (default = 0/Last)\n");
#endif /* !CONFIG_HPWDT_NMI_DECODING */
module_init(hpwdt_init);
module_exit(hpwdt_cleanup);