Darren Hart c02f2d420a ACPI/APEI: Limit printable size of BERT table data ... [ Upstream commit 3f8dec1162 ] Platforms with large BERT table data can trigger soft lockup errors while attempting to print the entire BERT table data to the console at boot: watchdog: BUG: soft lockup - CPU#160 stuck for 23s! [swapper/0:1] Observed on Ampere Altra systems with a single BERT record of ~250KB. The original bert driver appears to have assumed relatively small table data. Since it is impractical to reassemble large table data from interwoven console messages, and the table data is available in /sys/firmware/acpi/tables/data/BERT limit the size for tables printed to the console to 1024 (for no reason other than it seemed like a good place to kick off the discussion, would appreciate feedback from existing users in terms of what size would maintain their current usage model). Alternatively, we could make printing a CONFIG option, use the bert_disable boot arg (or something similar), or use a debug log level. However, all those solutions require extra steps or change the existing behavior for small table data. Limiting the size preserves existing behavior on existing platforms with small table data, and eliminates the soft lockups for platforms with large table data, while still making it available. Signed-off-by: Darren Hart <darren@os.amperecomputing.com> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com> Signed-off-by: Sasha Levin <sashal@kernel.org>		2022-04-08 14:23:56 +02:00
..
acpica	ACPICA: Avoid walking the ACPI Namespace if it is not there	2022-04-08 14:23:56 +02:00
apei	ACPI/APEI: Limit printable size of BERT table data	2022-04-08 14:23:56 +02:00
arm64	ACPI/IORT: Check node revision for PMCG resources	2022-02-16 12:56:19 +01:00
dptf	ACPI: DPTF: Add new PCH FIVR methods	2021-08-04 18:08:50 +02:00
nfit	ACPI: NFIT: Use fallback node id when numa info in NFIT table is incorrect	2021-09-27 11:40:43 -07:00
numa	ACPI: Add LoongArch support for ACPI_PROCESSOR/ACPI_NUMA	2021-07-16 19:09:20 +02:00
pmic	ACPI: PMIC: Fix intel_pmic_regs_handler() read accesses	2021-11-18 19:17:06 +01:00
x86	ACPI: PM: Revert "Only mark EC GPE for wakeup on Intel systems"	2022-02-23 12:03:18 +01:00
ac.c	ACPI: AC: Quirk GK45 to skip reading _PSR	2021-11-18 19:16:19 +01:00
acpi_adxl.c
acpi_amba.c	ACPI: AMBA: Fix resource name in /proc/iomem	2021-06-30 20:01:10 +02:00
acpi_apd.c	serial: 8250_dw: Add device HID for new AMD UART controller	2021-05-13 17:08:42 +02:00
acpi_cmos_rtc.c	ACPI: cmos_rtc: Using pr_fmt() and remove PREFIX	2021-06-07 15:36:45 +02:00
acpi_configfs.c	ACPI: configfs: Make get_header() to return error pointer	2021-07-16 19:20:28 +02:00
acpi_dbg.c
acpi_extlog.c
acpi_fpdt.c	ACPI: tables: FPDT: Do not print FW_BUG message if record types are reserved	2021-08-25 20:01:07 +02:00
acpi_ipmi.c	ACPI: ipmi: Remove address space handler in error path	2021-05-24 16:27:34 +02:00
acpi_lpat.c
acpi_lpit.c
acpi_lpss.c	Merge branch 'clk-frac-divider' into clk-next	2021-09-01 15:26:45 -07:00
acpi_memhotplug.c	ACPI: memhotplug: use a single static memory group for a single memory device	2021-09-08 11:50:23 -07:00
acpi_pad.c	ACPI: processor: Replace deprecated CPU-hotplug functions	2021-08-04 20:25:54 +02:00
acpi_platform.c
acpi_pnp.c	ACPI: PNP: compare the string length in the matching_id()	2020-12-15 19:30:49 +01:00
acpi_processor.c	ACPI: processor: Replace deprecated CPU-hotplug functions	2021-08-04 20:25:54 +02:00
acpi_tad.c	ACPI: Use DEVICE_ATTR_<RW|RO|WO> macros	2021-01-22 16:17:19 +01:00
acpi_video.c	ACPI: video: Add quirk for the Dell Vostro 3350	2021-06-30 20:03:41 +02:00
acpi_watchdog.c
battery.c	ACPI: battery: Add device HID and quirk for Microsoft Surface Go 3	2022-03-28 09:58:44 +02:00
bgrt.c	ACPI: bgrt: Use sysfs_emit	2021-06-23 19:27:50 +02:00
blacklist.c	ACPI: blacklist: Unify the message printing	2021-06-07 15:36:45 +02:00
bus.c	Revert "ACPI: Pass the same capabilities to the _OSC regardless of the query flag"	2022-04-08 14:22:58 +02:00
button.c	ACPI: button: Add DMI quirk for Lenovo Yoga 9 (14INTL5)	2021-08-25 19:57:01 +02:00
container.c
cppc_acpi.c	ACPI: CPPC: Check present CPUs for determining _CPC is valid	2022-01-27 11:04:51 +01:00
custom_method.c	ACPI: custom_method: fix a possible memory leak	2021-04-28 19:17:54 +02:00
debugfs.c
device_pm.c	for-5.14/drivers-2021-06-29	2021-06-30 12:21:16 -07:00
device_sysfs.c	ACPI: sysfs: fix doc warnings in device_sysfs.c	2021-06-17 14:32:05 +02:00
dock.c	ACPI: dock: fix some coding style issues	2021-04-08 16:27:03 +02:00
ec.c	Revert "ACPI: PM: s2idle: Cancel wakeup before dispatching EC GPE"	2022-03-11 12:22:37 +01:00
ec_sys.c
event.c	Merge branches 'acpi-ec', 'acpi-apei', 'acpi-soc' and 'acpi-misc'	2021-06-29 15:51:25 +02:00
evged.c
fan.c	ACPI: PM / fan: Put fan device IDs into separate header file	2021-05-21 19:02:35 +02:00
fan.h	ACPI: PM / fan: Put fan device IDs into separate header file	2021-05-21 19:02:35 +02:00
glue.c	Revert "ACPI: scan: Release PM resources blocked by unused objects"	2021-11-21 13:44:14 +01:00
hed.c	ACPI: HED: Drop unused ACPI_MODULE_NAME() definition	2021-03-08 16:51:48 +01:00
internal.h	ACPI: EC: Rework flushing of EC work while suspended to idle	2022-01-27 11:03:23 +01:00
ioapic.c
irq.c	ACPI: irq: Prevent unregistering of GIC SGIs	2021-04-23 18:00:52 +01:00
Kconfig	Merge branches 'acpi-numa', 'acpi-glue', 'acpi-config' and 'acpi-pmic'	2021-08-30 19:30:37 +02:00
Makefile	IOMMU Updates for Linux v5.14	2021-07-02 13:22:47 -07:00
nvs.c	Merge branches 'acpi-ec', 'acpi-apei', 'acpi-soc' and 'acpi-misc'	2021-06-29 15:51:25 +02:00
osi.c
osl.c	Revert "ACPI: Add memory semantics to acpi_os_map_memory()"	2021-09-23 20:39:36 +02:00
pci_irq.c	ACPI: PCI: IRQ: Consolidate printing diagnostic messages	2021-03-08 16:51:08 +01:00
pci_link.c	ACPI: utils: Introduce acpi_evaluation_failure_warn()	2021-03-08 19:10:30 +01:00
pci_mcfg.c	PCI: tegra: Add Tegra194 MCFG quirks for ECAM errata	2021-04-16 11:34:17 -05:00
pci_root.c	ACPI: pci_root: Unify the message printing	2021-06-07 15:36:45 +02:00
pci_slot.c
platform_profile.c	ACPI: platform-profile: call sysfs_notify() from platform_profile_store()	2021-08-16 18:32:02 +02:00
power.c	ACPI: PM: Fix device wakeup power reference counting error	2021-11-18 19:17:09 +01:00
pptt.c	ACPI: tables: PPTT: Populate cache-id if provided by firmware	2021-06-07 15:55:02 +02:00
prmt.c	ACPI: PRM: Find PRMT table before parsing it	2021-09-08 20:56:57 +02:00
proc.c
processor_core.c
processor_driver.c	ACPI: processor: Get rid of ACPICA message printing	2021-03-08 16:51:19 +01:00
processor_idle.c	ACPI: processor: Replace deprecated CPU-hotplug functions	2021-08-04 20:25:54 +02:00
processor_pdc.c	ACPI: processor: Get rid of ACPICA message printing	2021-03-08 16:51:19 +01:00
processor_perflib.c	ACPI: processor_perflib: Cleanup print messages	2021-06-07 15:36:46 +02:00
processor_thermal.c	ACPI: processor_thermal: Remove unused PREFIX for printing	2021-06-07 15:36:46 +02:00
processor_throttling.c	Merge branches 'acpi-dptf' and 'acpi-messages'	2021-06-29 15:50:37 +02:00
property.c	ACPI: properties: Consistently return -ENOENT if there are no more references	2022-04-08 14:22:58 +02:00
reboot.c	ACPI: reboot: Unify the message printing	2021-06-07 15:36:46 +02:00
resource.c	ACPI: resources: Add one more Medion model in IRQ override quirk	2021-11-18 19:16:20 +01:00
sbs.c	ACPI: sbs: Unify the message printing	2021-06-07 15:36:46 +02:00
sbshc.c	Merge branches 'acpi-ec', 'acpi-apei', 'acpi-soc' and 'acpi-misc'	2021-06-29 15:51:25 +02:00
sbshc.h
scan.c	ACPI: scan: Create platform device for BCM4752 and LNV4752 ACPI nodes	2022-01-27 11:03:48 +01:00
sleep.c	Revert "ACPI: PM: s2idle: Cancel wakeup before dispatching EC GPE"	2022-03-11 12:22:37 +01:00
sleep.h	Revert "Revert "ACPI: scan: Turn off unused power resources during initialization""	2021-05-10 14:02:17 +02:00
spcr.c	ACPI: SPCR: Add support for the new 16550-compatible Serial Port Subtype	2021-08-16 18:38:08 +02:00
sysfs.c	Merge branches 'acpi-dptf' and 'acpi-messages'	2021-06-29 15:50:37 +02:00
tables.c	memblock: exclude MEMBLOCK_NOMAP regions from kmemleak	2021-10-21 18:30:49 -10:00
thermal.c	- Use the newly introduced 'hot' and 'critical' ops for the acpi	2021-02-22 09:39:11 -08:00
tiny-power-button.c
utils.c	ACPI: utils: Fix reference counting in for_each_acpi_dev_match()	2021-07-19 16:22:01 +02:00
video_detect.c	ACPI: video: Force backlight native for Clevo NL5xRU and NL5xNU	2022-03-28 09:58:45 +02:00
viot.c	ACPI: Add driver for the VIOT table	2021-06-25 15:02:43 +02:00
wakeup.c