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watchdog: hpwdt: Add check for UEFI bits

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This patch is being created to use the UEFI bits in the type 219 SMBIOS
record in order to decide whether or not to execute BIOS code. This is a
better solution than to depend on the iCRU bit since not all future servers
will use iCRU.

Signed-off-by: Thomas Mingarelli <thomas.mingarelli@hp.com>
Signed-off-by: Wim Van Sebroeck <wim@iguana.be>
----
drivers/watchdog/hpwdt.c |    9 ++++++---
 1 files changed, 6 insertions(+), 3 deletions(-)
This commit is contained in:
Mingarelli, Thomas 2013-07-09 23:04:55 +00:00 committed by Wim Van Sebroeck
parent 086f3ec187
commit cce78da766
1 changed files with 7 additions and 4 deletions
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11
drivers/watchdog/hpwdt.c
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@ -39,7 +39,7 @@
#endif /* CONFIG_HPWDT_NMI_DECODING */
#include <asm/nmi.h>
#define HPWDT_VERSION "1.3.1"
#define HPWDT_VERSION "1.3.2"
#define SECS_TO_TICKS(secs) ((secs) * 1000 / 128)
#define TICKS_TO_SECS(ticks) ((ticks) * 128 / 1000)
#define HPWDT_MAX_TIMER TICKS_TO_SECS(65535)
@ -148,6 +148,7 @@ struct cmn_registers {
static unsigned int hpwdt_nmi_decoding;
static unsigned int allow_kdump = 1;
static unsigned int is_icru;
static unsigned int is_uefi;
static DEFINE_SPINLOCK(rom_lock);
static void *cru_rom_addr;
static struct cmn_registers cmn_regs;
@ -484,7 +485,7 @@ static int hpwdt_pretimeout(unsigned int ulReason, struct pt_regs *regs)
goto out;
spin_lock_irqsave(&rom_lock, rom_pl);
if (!die_nmi_called && !is_icru)
if (!die_nmi_called && !is_icru && !is_uefi)
asminline_call(&cmn_regs, cru_rom_addr);
die_nmi_called = 1;
spin_unlock_irqrestore(&rom_lock, rom_pl);
@ -492,7 +493,7 @@ static int hpwdt_pretimeout(unsigned int ulReason, struct pt_regs *regs)
if (allow_kdump)
hpwdt_stop();
if (!is_icru) {
if (!is_icru && !is_uefi) {
if (cmn_regs.u1.ral == 0) {
panic("An NMI occurred, "
"but unable to determine source.\n");
@ -679,6 +680,8 @@ static void dmi_find_icru(const struct dmi_header *dm, void *dummy)
smbios_proliant_ptr = (struct smbios_proliant_info *) dm;
if (smbios_proliant_ptr->misc_features & 0x01)
is_icru = 1;
if (smbios_proliant_ptr->misc_features & 0x408)
is_uefi = 1;
}
}
@ -697,7 +700,7 @@ static int hpwdt_init_nmi_decoding(struct pci_dev *dev)
* the old cru detect code.
*/
dmi_walk(dmi_find_icru, NULL);
if (!is_icru) {
if (!is_icru && !is_uefi) {
/*
* We need to map the ROM to get the CRU service.