From 47bece87b14b866872b52ff04d469832e4936756 Mon Sep 17 00:00:00 2001 From: Thomas Mingarelli Date: Thu, 4 Jun 2009 19:50:45 +0000 Subject: [WATCHDOG] hpwdt: Add NMI sourcing Add NMI sourcing functionality (Can only be active if nmi_watchdog is inactive). Signed-off-by: Thomas Mingarelli Signed-off-by: Wim Van Sebroeck --- drivers/watchdog/hpwdt.c | 59 ++++++++++++++++++++++++++++++++++++------------ 1 file changed, 44 insertions(+), 15 deletions(-) (limited to 'drivers/watchdog/hpwdt.c') diff --git a/drivers/watchdog/hpwdt.c b/drivers/watchdog/hpwdt.c index 3137361ccbfe..c0b9169ba5d5 100644 --- a/drivers/watchdog/hpwdt.c +++ b/drivers/watchdog/hpwdt.c @@ -19,6 +19,7 @@ #include #include #include +#include #include #include #include @@ -47,7 +48,7 @@ #define PCI_BIOS32_PARAGRAPH_LEN 16 #define PCI_ROM_BASE1 0x000F0000 #define ROM_SIZE 0x10000 -#define HPWDT_VERSION "1.01" +#define HPWDT_VERSION "1.1.1" struct bios32_service_dir { u32 signature; @@ -119,6 +120,7 @@ static int nowayout = WATCHDOG_NOWAYOUT; static char expect_release; static unsigned long hpwdt_is_open; static unsigned int allow_kdump; +static int hpwdt_nmi_sourcing; static void __iomem *pci_mem_addr; /* the PCI-memory address */ static unsigned long __iomem *hpwdt_timer_reg; @@ -468,21 +470,22 @@ static int hpwdt_pretimeout(struct notifier_block *nb, unsigned long ulReason, if (ulReason != DIE_NMI && ulReason != DIE_NMI_IPI) return NOTIFY_OK; - spin_lock_irqsave(&rom_lock, rom_pl); - if (!die_nmi_called) - asminline_call(&cmn_regs, cru_rom_addr); - die_nmi_called = 1; - spin_unlock_irqrestore(&rom_lock, rom_pl); - if (cmn_regs.u1.ral == 0) { - printk(KERN_WARNING "hpwdt: An NMI occurred, " - "but unable to determine source.\n"); - } else { - if (allow_kdump) - hpwdt_stop(); - panic("An NMI occurred, please see the Integrated " - "Management Log for details.\n"); + if (hpwdt_nmi_sourcing) { + spin_lock_irqsave(&rom_lock, rom_pl); + if (!die_nmi_called) + asminline_call(&cmn_regs, cru_rom_addr); + die_nmi_called = 1; + spin_unlock_irqrestore(&rom_lock, rom_pl); + if (cmn_regs.u1.ral == 0) { + printk(KERN_WARNING "hpwdt: An NMI occurred, " + "but unable to determine source.\n"); + } else { + if (allow_kdump) + hpwdt_stop(); + panic("An NMI occurred, please see the Integrated " + "Management Log for details.\n"); + } } - return NOTIFY_OK; } @@ -627,11 +630,37 @@ static struct notifier_block die_notifier = { * Init & Exit */ +#ifdef ARCH_HAS_NMI_WATCHDOG +static void __devinit hpwdt_check_nmi_sourcing(struct pci_dev *dev) +{ + /* + * If nmi_watchdog is turned off then we can turn on + * our nmi sourcing capability. + */ + if (!nmi_watchdog_active()) + hpwdt_nmi_sourcing = 1; + else + dev_warn(&dev->dev, "NMI sourcing is disabled. To enable this " + "functionality you must reboot with nmi_watchdog=0.\n"); +} +#else +static void __devinit hpwdt_check_nmi_sourcing(struct pci_dev *dev) +{ + dev_warn(&dev->dev, "NMI sourcing is disabled. " + "Your kernel does not support a NMI Watchdog.\n"); +} +#endif + static int __devinit hpwdt_init_one(struct pci_dev *dev, const struct pci_device_id *ent) { int retval; + /* + * Check if we can do NMI sourcing or not + */ + hpwdt_check_nmi_sourcing(dev); + /* * First let's find out if we are on an iLO2 server. We will * not run on a legacy ASM box. -- cgit v1.2.2