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linux/drivers/watchdog
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Jerry Hoemann 2b3d89b402 watchdog: hpwdt: Remove legacy NMI sourcing. 
Gen8 and prior Proliant systems supported the "CRU" interface
to firmware.  This interfaces allows linux to "call back" into firmware
to source the cause of an NMI.  This feature isn't fully utilized
as the actual source of the NMI isn't printed, the driver only
indicates that the source couldn't be determined when the call
fails.

With the advent of Gen9, iCRU replaces the CRU. The call back
feature is no longer available in firmware.  To be compatible and
not attempt to call back into firmware on system not supporting CRU,
the SMBIOS table is consulted to determine if it is safe to
make the call back or not.

This results in about half of the driver code being devoted
to either making CRU calls or determing if it is safe to make
CRU calls.  As noted, the driver isn't really using the results of
the CRU calls.

Furthermore, as a consequence of the Spectre security issue, the
BIOS/EFI calls are being wrapped into Spectre-disabling section.
Removing the call back in hpwdt_pretimeout assists in this effort.

As the CRU sourcing of the NMI isn't required for handling the
NMI and there are security concerns with making the call back, remove
the legacy (pre Gen9) NMI sourcing and the DMI code to determine if
the system had the CRU interface.

Signed-off-by: Jerry Hoemann <jerry.hoemann@hpe.com>
Acked-by: Ingo Molnar <mingo@kernel.org>
Reviewed-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Wim Van Sebroeck <wim@iguana.be>
 		2018-03-03 15:52:33 +01:00
..
Kconfig watchdog: sp5100_tco.c: fix potential build failure 2018-02-19 17:44:05 +01:00
Makefile linux-watchdog 4.16-rc1 merge window tag 2018-02-07 11:54:34 -08:00
acquirewdt.c
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advantechwdt.c watchdog: advantechwdt: mark expected switch fall-through 2017-12-28 20:45:28 +01:00
alim1535_wdt.c watchdog: alim1535_wdt: mark expected switch fall-through 2017-12-28 20:45:28 +01:00
alim7101_wdt.c treewide: Switch DEFINE_TIMER callbacks to struct timer_list * 2017-11-21 15:57:05 -08:00
ar7_wdt.c
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asm9260_wdt.c watchdog: asm9260_wdt: don't round closest with get_timeleft 2017-09-09 20:25:34 +02:00
aspeed_wdt.c watchdog: aspeed: Move init to arch_initcall 2017-12-28 20:44:50 +01:00
at91rm9200_wdt.c
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at91sam9_wdt.c treewide: setup_timer() -> timer_setup() 2017-11-21 15:57:07 -08:00
at91sam9_wdt.h
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ath79_wdt.c
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atlas7_wdt.c watchdog: constify watchdog_ops structures 2017-02-24 14:00:23 -08:00
bcm47xx_wdt.c treewide: setup_timer() -> timer_setup() 2017-11-21 15:57:07 -08:00
bcm63xx_wdt.c treewide: setup_timer() -> timer_setup() 2017-11-21 15:57:07 -08:00
bcm2835_wdt.c scripts/spelling.txt: add "partiton" pattern and fix typo instances 2017-02-27 18:43:46 -08:00
bcm7038_wdt.c watchdog: bcm7038: Check the return value from clk_prepare_enable() 2017-09-09 20:52:13 +02:00
bcm_kona_wdt.c watchdog: bcm281xx: Fix use of uninitialized spinlock. 2017-05-19 10:42:25 +02:00
bfin_wdt.c
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booke_wdt.c watchdog: constify watchdog_ops structures 2017-02-24 14:00:23 -08:00
cadence_wdt.c watchdog: cadence_wdt: Show information when driver is probed 2017-09-09 20:35:31 +02:00
coh901327_wdt.c watchdog: coh901327_wdt: constify watchdog_ops structure 2017-09-09 20:06:38 +02:00
cpu5wdt.c treewide: setup_timer() -> timer_setup() 2017-11-21 15:57:07 -08:00
cpwd.c watchdog: cpwd: Convert timers to use timer_setup() 2017-11-02 15:50:26 -07:00
da9052_wdt.c watchdog: da9052_wdt: Convert to use device managed functions 2017-02-24 14:00:23 -08:00
da9055_wdt.c watchdog: da9055_wdt: Convert to use device managed functions 2017-02-24 14:00:23 -08:00
da9062_wdt.c watchdog: da9062: use protection delay mechanism from core 2017-12-28 20:45:08 +01:00
da9063_wdt.c watchdog: da9063_wdt: Simplify by removing unneeded struct... 2017-09-09 20:55:26 +02:00
davinci_wdt.c watchdog: davinci_wdt: add restart function 2017-12-28 20:45:56 +01:00
diag288_wdt.c watchdog: constify watchdog_ops and watchdog_info structures 2017-09-09 20:29:53 +02:00
digicolor_wdt.c watchdog: constify watchdog_ops structures 2017-02-24 14:00:23 -08:00
dw_wdt.c watchdog: dw_wdt: add stop watchdog operation 2017-12-28 20:44:55 +01:00
ebc-c384_wdt.c watchdog: ebc-c384_wdt: Utilize devm_ functions in driver probe callback 2017-02-24 14:00:23 -08:00
ep93xx_wdt.c watchdog: ep93xx_wdt: cleanup and let the core handle the heartbeat 2017-02-24 14:00:23 -08:00
eurotechwdt.c watchdog: eurotechwdt: mark expected switch fall-through 2017-12-28 20:45:51 +01:00
f71808e_wdt.c watchdog: f71808e_wdt: Fix magic close handling 2018-03-03 15:52:32 +01:00
ftwdt010_wdt.c watchdog: ftwdt010: Make interrupt optional 2017-12-28 20:45:02 +01:00
gef_wdt.c
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geodewdt.c
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gpio_wdt.c watchdog: gpio_wdt: set WDOG_HW_RUNNING in gpio_wdt_stop 2017-12-28 20:45:36 +01:00
hpwdt.c watchdog: hpwdt: Remove legacy NMI sourcing. 2018-03-03 15:52:33 +01:00
i6300esb.c watchdog: i6300esb: remove info message and version number 2017-12-28 20:45:18 +01:00
iTCO_vendor.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
iTCO_vendor_support.c
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iTCO_wdt.c watchdog: Revert "iTCO_wdt: all versions count down twice" 2017-09-09 17:41:24 +02:00
ib700wdt.c watchdog: ib700wdt: mark expected switch fall-through 2017-12-28 20:45:52 +01:00
ibmasr.c
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ie6xx_wdt.c
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imgpdc_wdt.c watchdog: constify watchdog_info structures 2017-02-24 14:00:23 -08:00
imx2_wdt.c watchdog: imx2_wdt: restore previous timeout after suspend+resume 2018-01-21 12:44:58 +01:00
indydog.c
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intel-mid_wdt.c watchdog: intel-mid_wdt: Keep watchdog running 2017-06-05 20:37:35 +02:00
intel_scu_watchdog.c
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intel_scu_watchdog.h
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iop_wdt.c
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it87_wdt.c watchdog: it87_wdt: constify watchdog_ops structure 2017-09-09 20:06:25 +02:00
it8712f_wdt.c
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ixp4xx_wdt.c
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jz4740_wdt.c watchdog: jz4740: Add support for the watchdog in jz4780 SoC 2017-12-28 20:44:44 +01:00
kempld_wdt.c watchdog: kempld: fix gcc-4.3 build 2017-03-01 06:15:10 -08:00
ks8695_wdt.c
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lantiq_wdt.c watchdog: lantiq: access boot cause register through regmap 2017-09-04 13:53:15 +02:00
loongson1_wdt.c watchdog: loongson1: Add Loongson1 SoC watchdog driver 2016-12-16 06:53:55 -08:00
lpc18xx_wdt.c watchdog: lpc18xx_wdt: Convert timers to use timer_setup() 2017-11-02 15:50:30 -07:00
m54xx_wdt.c
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machzwd.c treewide: Switch DEFINE_TIMER callbacks to struct timer_list * 2017-11-21 15:57:05 -08:00
max63xx_wdt.c
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max77620_wdt.c watchdog: max77620_wdt: constify platform_device_id 2017-09-09 20:40:39 +02:00
mei_wdt.c watchdog: mei_wdt: don't use of variable length array 2017-12-28 20:45:23 +01:00
mena21_wdt.c watchdog: mena21_wdt: Convert to use device managed functions and other improvements 2017-02-24 14:00:23 -08:00
menf21bmc_wdt.c
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meson_gxbb_wdt.c watchdog: meson: Handle return value of clk_prepare_enable 2017-07-03 11:02:31 +02:00
meson_wdt.c watchdog: meson-wdt: add support for the watchdog on Meson8 and Meson8m2 2017-09-09 20:14:01 +02:00
mixcomwd.c treewide: Switch DEFINE_TIMER callbacks to struct timer_list * 2017-11-21 15:57:05 -08:00
moxart_wdt.c
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mpc8xxx_wdt.c watchdog: mpc8xxx: use the core worker function 2017-12-28 20:45:36 +01:00
mt7621_wdt.c watchdog: mt7621: switch to using managed devm_watchdog_register_device() 2018-01-21 12:44:59 +01:00
mtk_wdt.c
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mtx-1_wdt.c treewide: setup_timer() -> timer_setup() 2017-11-21 15:57:07 -08:00
mv64x60_wdt.c
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ni903x_wdt.c
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nic7018_wdt.c watchdog: nic7018_wdt: Add NIC7018 watchdog driver 2017-02-24 14:00:23 -08:00
nuc900_wdt.c treewide: setup_timer() -> timer_setup() 2017-11-21 15:57:07 -08:00
nv_tco.c
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nv_tco.h
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octeon-wdt-main.c watchdog: octeon-wdt: Add support for 78XX SOCs. 2017-09-04 21:19:03 +02:00
octeon-wdt-nmi.S watchdog: octeon-wdt: Remove old boot vector code. 2017-09-04 21:19:03 +02:00
of_xilinx_wdt.c watchdog: of_xilinx_wdt: Add suspend/resume support 2017-09-09 20:48:18 +02:00
omap_wdt.c
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omap_wdt.h
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orion_wdt.c watchdog: orion: fix typo 2017-12-28 20:44:57 +01:00
pc87413_wdt.c Annotate hardware config module parameters in drivers/watchdog/ 2017-04-20 12:02:32 +01:00
pcwd.c treewide: setup_timer() -> timer_setup() 2017-11-21 15:57:07 -08:00
pcwd_pci.c watchdog: pcwd_pci: mark expected switch fall-through 2017-12-28 20:45:29 +01:00
pcwd_usb.c watchdog: pcwd_usb: remove unneeded DRIVER_LICENSE #define 2017-12-28 20:45:50 +01:00
pic32-dmt.c
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pic32-wdt.c
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pika_wdt.c treewide: setup_timer() -> timer_setup() 2017-11-21 15:57:07 -08:00
pnx833x_wdt.c
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pnx4008_wdt.c
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pretimeout_noop.c
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pretimeout_panic.c
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qcom-wdt.c watchdog: qcom: Check for platform_get_resource() failure 2017-09-09 20:50:35 +02:00
rave-sp-wdt.c watchdog: Add RAVE SP watchdog driver 2018-01-08 10:08:36 +00:00
rc32434_wdt.c
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rdc321x_wdt.c treewide: setup_timer() -> timer_setup() 2017-11-21 15:57:07 -08:00
renesas_wdt.c watchdog: renesas_wdt: update copyright dates 2017-09-09 21:11:58 +02:00
retu_wdt.c
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riowd.c
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rn5t618_wdt.c watchdog: constify watchdog_info structures 2017-02-24 14:00:23 -08:00
rt2880_wdt.c watchdog: constify watchdog_ops and watchdog_info structures 2017-09-09 20:29:53 +02:00
rtd119x_wdt.c watchdog: Add Realtek RTD1295 2017-12-28 20:44:39 +01:00
rza_wdt.c watchdog: add rza_wdt driver 2017-06-05 20:37:17 +02:00
s3c2410_wdt.c watchdog: s3c2410: Minor code cleanup 2017-06-05 20:38:52 +02:00
sa1100_wdt.c watchdog: sa11x0/pxa: fix error path of driver initialization 2017-02-24 14:00:23 -08:00
sama5d4_wdt.c watchdog: sama5d4: Add comment explaining what happens on resume 2017-06-05 17:58:39 +02:00
sb_wdog.c
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sbc60xxwdt.c treewide: Switch DEFINE_TIMER callbacks to struct timer_list * 2017-11-21 15:57:05 -08:00
sbc7240_wdt.c
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sbc8360.c
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sbc_epx_c3.c
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sbc_fitpc2_wdt.c
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sbsa_gwdt.c watchdog: sbsa: use 32-bit read for WCV 2018-03-03 15:52:32 +01:00
sc520_wdt.c treewide: Switch DEFINE_TIMER callbacks to struct timer_list * 2017-11-21 15:57:05 -08:00
sc1200wdt.c watchdog: sc1200: constify pnp_device_id 2017-09-09 21:14:46 +02:00
sch311x_wdt.c
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scx200_wdt.c
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shwdt.c treewide: setup_timer() -> timer_setup() 2017-11-21 15:57:07 -08:00
sirfsoc_wdt.c watchdog: constify watchdog_ops structures 2017-02-24 14:00:23 -08:00
smsc37b787_wdt.c
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softdog.c watchdog: softdog: fire watchdog even if softirqs do not get to run 2017-03-01 06:15:10 -08:00
sp805_wdt.c watchdog: sp805: constify amba_id 2017-09-09 21:17:44 +02:00
sp5100_tco.c watchdog: sp5100_tco: Add support for recent FCH versions 2018-01-21 12:56:37 +01:00
sp5100_tco.h watchdog: sp5100_tco: Add support for recent FCH versions 2018-01-21 12:56:37 +01:00
sprd_wdt.c watchdog: Add Spreadtrum watchdog driver 2017-12-28 20:45:40 +01:00
st_lpc_wdt.c
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stm32_iwdg.c watchdog: stm32: Fix copyright 2017-12-28 20:45:51 +01:00
stmp3xxx_rtc_wdt.c
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sun4v_wdt.c watchdog: constify watchdog_ops structures 2017-02-24 14:00:23 -08:00
sunxi_wdt.c watchdog: sunxi_wdt: use of_device_get_match_data 2017-12-28 20:45:12 +01:00
tangox_wdt.c watchdog: tangox: Use watchdog core to install restart handler 2017-02-24 14:00:23 -08:00
tegra_wdt.c watchdog: tegra_wdt: Convert to use device managed functions 2017-02-24 14:00:23 -08:00
ts72xx_wdt.c watchdog: ts72xx_wdt: constify watchdog_ops structure 2017-09-09 20:06:14 +02:00
ts4800_wdt.c
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twl4030_wdt.c mfd: twl: Move header file out of I2C realm 2017-09-04 14:41:02 +01:00
txx9wdt.c
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uniphier_wdt.c watchdog: uniphier: add UniPhier watchdog driver 2017-07-03 13:58:55 +02:00
ux500_wdt.c
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via_wdt.c treewide: Switch DEFINE_TIMER callbacks to struct timer_list * 2017-11-21 15:57:05 -08:00
w83627hf_wdt.c watchdog: w83627hf: make const array chip_name static 2017-09-09 20:08:03 +02:00
w83877f_wdt.c treewide: Switch DEFINE_TIMER callbacks to struct timer_list * 2017-11-21 15:57:05 -08:00
w83977f_wdt.c
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wafer5823wdt.c
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watchdog_core.c watchdog: document watchdog_init_timeout() wdd parameter 2017-12-28 20:45:56 +01:00
watchdog_core.h
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watchdog_dev.c watchdog: core: make sure the watchdog_worker is not deferred 2018-01-21 12:44:59 +01:00
watchdog_pretimeout.c
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watchdog_pretimeout.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
wd501p.h
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wdat_wdt.c
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wdrtas.c
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wdt.c Annotate hardware config module parameters in drivers/watchdog/ 2017-04-20 12:02:32 +01:00
wdt285.c
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wdt977.c
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wdt_pci.c watchdog: wdt_pci: mark expected switch fall-through 2017-12-28 20:45:30 +01:00
wm831x_wdt.c watchdog: wm831x_wdt: Convert to use device managed functions 2017-02-24 14:00:23 -08:00
wm8350_wdt.c
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xen_wdt.c watchdog: xen_wdt: remove info message and version number 2017-12-28 20:45:44 +01:00
ziirave_wdt.c watchdog: ziirave: constify i2c_device_id 2017-09-09 21:16:17 +02:00
zx2967_wdt.c watchdog: zx2967: explicitly request exclusive reset control 2017-09-09 20:18:43 +02:00