Stewart Smith 774fea1a38 powerpc/powernv: Read OPAL error log and export it through sysfs ... Based on a patch by: Mahesh Salgaonkar <mahesh@linux.vnet.ibm.com> This patch adds support to read error logs from OPAL and export them to userspace through a sysfs interface. We export each log entry as a directory in /sys/firmware/opal/elog/ Currently, OPAL will buffer up to 128 error log records, we don't need to have any knowledge of this limit on the Linux side as that is actually largely transparent to us. Each error log entry has the following files: id, type, acknowledge, raw. Currently we just export the raw binary error log in the 'raw' attribute. In a future patch, we may parse more of the error log to make it a bit easier for userspace (e.g. to be able to display a brief summary in petitboot without having to have a full parser). If we have >128 logs from OPAL, we'll only be notified of 128 until userspace starts acknowledging them. This limitation may be lifted in the future and with this patch, that should "just work" from the linux side. A userspace daemon should: - wait for error log entries using normal mechanisms (we announce creation) - read error log entry - save error log entry safely to disk - acknowledge the error log entry - rinse, repeat. On the Linux side, we read the error log when we're notified of it. This possibly isn't ideal as it would be better to only read them on-demand. However, this doesn't really work with current OPAL interface, so we read the error log immediately when notified at the moment. I've tested this pretty extensively and am rather confident that the linux side of things works rather well. There is currently an issue with the service processor side of things for >128 error logs though. Signed-off-by: Stewart Smith <stewart@linux.vnet.ibm.com> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>		2014-03-07 16:19:00 +11:00
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ABI	powerpc/powernv: Read OPAL error log and export it through sysfs	2014-03-07 16:19:00 +11:00
DocBook	Merge branch 'v4l_for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mchehab/linux-media	2014-01-31 09:31:14 -08:00
EDID	drm: Add 1600x1200 (UXGA) screen resolution to the built-in EDIDs	2013-04-12 14:06:16 +10:00
PCI	Merge branch 'pci/msi' into next	2014-01-07 17:34:39 -07:00
RCU	Merge branches 'doc.2013.12.03a', 'fixes.2013.12.12a', 'rcutorture.2013.12.03a' and 'sparse.2013.12.12a' into HEAD	2013-12-12 12:35:38 -08:00
accounting	Documentation/accounting/getdelays.c: avoid strncpy in accounting tool	2013-07-03 16:08:06 -07:00
acpi	ACPI and power management updates for 3.14-rc1	2014-01-24 15:51:02 -08:00
aoe	aoe: remove do-nothing NAME="%k" term from example udev rules	2013-09-11 15:59:28 -07:00
arm	ARM: SoC platform changes for 3.14	2014-01-23 18:40:49 -08:00
arm64	arm64: Use 42-bit address space with 64K pages	2013-11-05 17:23:52 +00:00
auxdisplay	…
backlight	backlight: lp855x_bl: support new LP8555 device	2013-11-13 12:09:14 +09:00
blackfin	…
block	Linux 3.13-rc6	2013-12-31 09:51:02 -07:00
blockdev	zram: remove old private project comment	2014-01-30 16:56:55 -08:00
bus-devices	…
cdrom	…
cgroups	Merge branch 'v4l_for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mchehab/linux-media	2014-01-31 09:31:14 -08:00
connector	connector - documentation: simplify netlink message length assignment	2013-10-02 16:03:51 -04:00
console	TTY:console: update document console.txt	2013-05-21 10:21:57 -07:00
cpu-freq	Documentation: cpufreq / boost: Update BOOST documentation	2014-01-17 02:00:45 +01:00
cpuidle	cpuidle: remove cpuidle_unregister_governor()	2013-10-30 01:21:24 +01:00
cris	…
crypto	drivers/dma: remove unused support for MEMSET operations	2013-07-03 16:07:42 -07:00
development-process	Documentation: development-process: Update -mm and -next URLs	2013-07-25 12:37:24 +02:00
device-mapper	dm cache: add policy name to status output	2014-01-16 13:44:11 -05:00
devicetree	Merge branch 'irq-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip	2014-02-05 16:02:53 -08:00
driver-model	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial	2014-01-22 21:21:55 -08:00
dvb	[media] update Michael Krufky's email address	2014-02-04 06:34:21 -02:00
early-userspace	Documentation: remove reference to 2.7 kernel in early-userspace	2013-08-20 12:47:28 +02:00
extcon	extcon: fix switch class porting guide (Documentation)	2014-01-07 11:54:28 +09:00
fault-injection	doc: fix quite a few typos within Documentation	2012-11-19 14:28:24 +01:00
fb	Documentation/fb/viafb.modes fix a typo	2013-08-20 12:41:11 +02:00
filesystems	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mason/linux-btrfs	2014-01-30 20:08:20 -08:00
firmware_class	…
fmc	doc: Fix typo "is is" in Documentations	2013-08-27 10:50:52 +02:00
frv	…
gpio	gpiolib: return -ENOENT if no GPIO mapping exists	2013-12-12 19:33:59 +01:00
hid	HID: uhid: use generic hidinput_input_event()	2013-07-31 10:33:05 +02:00
hwmon	Update Jean Delvare's e-mail address	2014-01-29 20:40:08 +01:00
i2c	Merge branch 'i2c/for-current' of git://git.kernel.org/pub/scm/linux/kernel/git/wsa/linux	2014-01-29 19:56:20 -08:00
i2o	…
ia64	Fix example error_injection_tool	2013-04-02 09:39:55 -07:00
ide	…
infiniband	…
input	Input: fix typos in Documentation/input/gamepad.txt	2013-12-18 08:47:43 -08:00
ioctl	s390/hypfs: add interface for diagnose 0x304	2014-01-24 09:40:59 +01:00
isdn	…
ja_JP	Documentation: ja_JP: Update broken link to tpp	2013-12-10 23:09:08 -08:00
kbuild	Documentation/kbuild/kconfig.txt: 'make listnewconfig' replaces: yes "" | make oldconfig	2013-10-08 23:51:50 +02:00
kdump	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial	2013-07-04 11:40:58 -07:00
ko_KR	Documentation: HOWTO: Updates on subsystem trees, patchwork, -next (vs. -mm) in ko_KR	2014-01-08 15:32:51 -08:00
laptops	Documentation: Fix size parameter for snprintf	2014-01-02 10:47:33 +01:00
leds	leds: lp5523: Support LED MUX configuration on running a pattern	2014-01-27 17:28:48 -08:00
m68k	block: remove refs to XD disks from documentation	2013-05-17 15:17:12 +02:00
make	…
memory-devices	…
metag	doc: fix misspellings with 'codespell' tool	2013-05-28 12:02:12 +02:00
mic	misc: mic: Fix endianness issues.	2013-11-27 11:03:38 -08:00
mips	…
misc-devices	Merge branch 'hwmon-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jdelvare/staging	2014-01-29 18:56:27 -08:00
mmc	mmc: core: Add in support to expose PRV for v4 MMCs	2013-03-22 12:10:42 -04:00
mn10300	…
mtd	mtd: nand: pxa3xx: Add documentation about the controller	2014-01-03 11:22:09 -08:00
namespaces	userns: Recommend use of memory control groups.	2013-01-26 22:20:06 -08:00
netlabel	…
networking	net: Document promote_secondaries	2014-01-27 20:39:21 -08:00
nfc	NFC: Update pn544 documentation	2013-01-10 01:27:46 +01:00
parisc	parisc: document the shadow registers	2013-07-09 22:09:19 +02:00
pcmcia	…
power	Documentation/: update FireWire debugging documentation	2014-01-12 18:54:38 +01:00
powerpc	powerpc: Update the 00-Index in Documentation/powerpc	2013-08-27 14:44:27 +10:00
pps	USB: serial: invoke dcd_change ldisc's handler.	2013-09-26 09:45:40 -07:00
prctl	…
pti	…
ptp	ptp: add the PTP_SYS_OFFSET ioctl to the testptp program	2013-09-23 16:46:17 -04:00
rapidio	doc: Fix typo in doucmentations	2013-07-25 12:34:15 +02:00
s390	qeth: bridgeport support - address notifications	2014-01-15 14:48:01 -08:00
scheduler	sched/deadline: Add sched_dl documentation	2014-01-28 13:08:40 +01:00
scsi	Main batch of InfiniBand/RDMA changes for 3.14:	2014-01-24 17:18:32 -08:00
security	ima: update IMA-templates.txt documentation	2014-01-03 07:42:59 -05:00
serial	serial: core: delete .set_wake() callback	2013-10-16 13:16:19 -07:00
sh	…
sound	ASoC: docs: Update the Overview document	2014-01-07 17:56:32 +00:00
spi	spi: Correction to typos in Documentation/spi/spi-summary	2013-12-09 17:22:19 +00:00
sysctl	Merge branch 'core-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip	2014-01-31 08:59:46 -08:00
target	target: Remove TF_CIT_TMPL macro	2013-10-16 13:35:02 -07:00
thermal	thermal: thermal_core: allow binding with limits on bind_params	2013-09-03 09:10:24 -04:00
timers	doc: add missing files to timers/00-INDEX	2013-10-27 21:55:50 +00:00
tpm	drivers/tpm: add xen tpmfront interface	2013-08-09 10:57:06 -04:00
trace	Documentation/trace/postprocess/trace-vmscan-postprocess.pl: fix the traceevent regex	2014-01-23 16:36:52 -08:00
usb	doc: Fix typo in USB Gadget Documentation	2014-01-10 15:33:54 +01:00
vDSO	…
video4linux	[media] sn9c102: prepare for removal by moving it to staging	2013-12-20 13:41:36 -02:00
virtual	Merge branch 'kvm-ppc-next' of git://github.com/agraf/linux-2.6 into kvm-queue	2014-01-29 18:29:01 +01:00
vm	mm: documentation: remove hopelessly out-of-date locking doc	2014-01-23 16:36:50 -08:00
w1	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial	2013-07-04 11:40:58 -07:00
watchdog	watchdog: delete mpcore_wdt driver	2013-07-11 21:47:58 +02:00
wimax	…
x86	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial	2014-01-22 21:21:55 -08:00
xtensa	xtensa: remap io area defined in device tree	2014-01-15 00:25:14 +04:00
zh_CN	Documentation: zh_CN: Update broken link to tpp	2013-12-10 23:09:08 -08:00
.gitignore	…
00-INDEX	doc: fix a typo in Documentation/00-INDEX	2013-08-27 10:53:07 +02:00
BUG-HUNTING	…
Changes	remove obsolete references to powertweak	2013-11-27 20:34:32 -08:00
CodingStyle	Documentation/CodingStyle: allow multiple return statements per function	2013-07-03 16:08:01 -07:00
DMA-API-HOWTO.txt	DMA-API: provide a helper to set both DMA and coherent DMA masks	2013-09-17 15:32:37 +01:00
DMA-API.txt	DMA-API: provide a helper to set both DMA and coherent DMA masks	2013-09-17 15:32:37 +01:00
DMA-ISA-LPC.txt	…
DMA-attributes.txt	doc: Documentation/DMA-attributes.txt fix typo	2013-10-14 15:50:53 +02:00
HOWTO	Documentation: HOWTO: Update broken links to tpp	2013-12-10 23:09:08 -08:00
IPMI.txt	ipmi: add options to disable openfirmware and PCI scanning	2013-02-27 19:10:21 -08:00
IRQ-affinity.txt	doc: fix a typo about irq affinity	2013-08-20 12:59:18 +02:00
IRQ-domain.txt	doc: fix some typos	2013-12-02 14:48:28 +01:00
IRQ.txt	…
Intel-IOMMU.txt	…
Makefile	…
ManagementStyle	…
SAK.txt	…
SM501.txt	…
SecurityBugs	…
SubmitChecklist	Finally eradicate CONFIG_HOTPLUG	2013-06-03 14:20:18 -07:00
SubmittingDrivers	…
SubmittingPatches	Documentation/SubmittingPatches: Request summaries for commit references	2013-08-20 12:58:15 +02:00
VGA-softcursor.txt	…
applying-patches.txt	…
assoc_array.txt	KEYS: Fix multiple key add into associative array	2013-12-02 11:24:18 +00:00
atomic_ops.txt	Documentation: Memory barrier semantics of atomic_xchg()	2013-01-08 14:14:55 -08:00
bad_memory.txt	…
basic_profiling.txt	…
bcache.txt	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial	2013-07-04 11:40:58 -07:00
binfmt_misc.txt	…
braille-console.txt	…
bt8xxgpio.txt	…
btmrvl.txt	…
bus-virt-phys-mapping.txt	…
cachetlb.txt	Documentation: fix typo and update version in cachetlb.txt	2013-08-20 12:46:52 +02:00
circular-buffers.txt	documentation: Update circular buffer for load-acquire/store-release	2013-12-03 10:08:57 -08:00
clk.txt	clk: Add set_rate_and_parent() op	2014-01-16 12:00:57 -08:00
coccinelle.txt	Coccinelle: Update information about the minimal version required	2013-07-03 22:58:20 +02:00
cpu-hotplug.txt	Documentation/cpu-hotplug.txt: fix a typo in example code	2014-01-23 16:37:01 -08:00
cpu-load.txt	…
cputopology.txt	doc: Documentation/cputopology.txt fix typo	2013-09-04 12:59:47 +02:00
crc32.txt	…
dcdbas.txt	…
debugging-modules.txt	…
debugging-via-ohci1394.txt	firewire: Enable remote DMA above 4 GB	2014-01-20 01:11:13 +01:00
dell_rbu.txt	…
devices.txt	misc: Reserve minor for VFIO	2013-12-19 10:17:11 -07:00
digsig.txt	…
dma-buf-sharing.txt	dma-buf: Expose buffer size to userspace (v2)	2013-09-10 11:36:45 +05:30
dmaengine.txt	…
dmatest.txt	dmatest: add a 'wait' parameter	2013-11-14 11:04:40 -08:00
dontdiff	x86: remove offsets.h from .gitignore and dontdiff	2012-11-19 14:10:53 +01:00
dynamic-debug-howto.txt	dynamic-debug-howto.txt: update since new wildcard support	2014-01-23 16:36:55 -08:00
edac.txt	…
efi-stub.txt	doc: Fix trivial spelling mistake in efi-stub.txt	2013-12-19 15:09:14 +01:00
eisa.txt	…
email-clients.txt	doc: fix some typos	2013-12-02 14:48:28 +01:00
flexible-arrays.txt	…
futex-requeue-pi.txt	…
gcov.txt	gcov: compile specific gcov implementation based on gcc version	2013-11-13 12:09:34 +09:00
highuid.txt	…
hw_random.txt	hwrng: Fix a wrong comment in Documentation/hw_random.txt	2013-03-10 18:16:36 +08:00
hwspinlock.txt	doc: documentation/hwspinlock.txt fix typo	2013-08-27 10:46:02 +02:00
init.txt	…
initrd.txt	…
intel_txt.txt	Documentation: remove depends on CONFIG_EXPERIMENTAL	2013-01-11 11:38:03 -08:00
io-mapping.txt	doc: fix some typos	2013-12-02 14:48:28 +01:00
io_ordering.txt	…
iostats.txt	iostats.txt: add easy-to-find description for field 6	2013-04-29 15:18:50 +02:00
irqflags-tracing.txt	…
isapnp.txt	…
java.txt	…
kernel-doc-nano-HOWTO.txt	kernel-doc: Update references to SGML to refs to XML instead.	2013-05-28 12:02:11 +02:00
kernel-docs.txt	…
kernel-parameters.txt	Documentation/kernel-parameters.txt: fix memmap= language	2014-02-06 13:48:51 -08:00
kernel-per-CPU-kthreads.txt	kthread: Add pointer to vmstat-avoidance patch	2013-09-25 06:49:46 -07:00
kmemcheck.txt	Documentation/kmemcheck: update kmemcheck documentation	2013-08-27 10:47:05 +02:00
kmemleak.txt	…
kobject.txt	kobject: remove kset from sysfs immediately in kset_unregister()	2013-12-07 21:20:11 -08:00
kprobes.txt	…
kref.txt	kref: Add kref_get_unless_zero documentation	2012-11-28 18:36:06 +10:00
ldm.txt	…
local_ops.txt	…
lockdep-design.txt	…
lockstat.txt	lockstat: Report avg wait and hold times	2013-10-09 08:19:08 +02:00
lockup-watchdogs.txt	…
logo.gif	…
logo.txt	…
magic-number.txt	wanrouter: completely decouple obsolete code from kernel.	2013-01-31 19:20:33 -05:00
md.txt	doc: fix some typos in documentations	2013-12-02 14:45:19 +01:00
media-framework.txt	Merge branch 'v4l_for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mchehab/linux-media	2013-07-13 12:09:57 -07:00
memory-barriers.txt	locking/doc: Rename LOCK/UNLOCK to ACQUIRE/RELEASE	2014-01-12 10:37:13 +01:00
memory-hotplug.txt	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial	2013-09-06 09:36:28 -07:00
module-signing.txt	Add Documentation/module-signing.txt file	2013-12-13 15:59:11 +00:00
mono.txt	…
mutex-design.txt	locking/doc: Update references to kernel/mutex.c	2013-11-11 12:41:33 +01:00
nommu-mmap.txt	…
numastat.txt	…
oops-tracing.txt	…
padata.txt	…
parport-lowlevel.txt	…
parport.txt	…
percpu-rw-semaphore.txt	…
phy.txt	drivers: phy: add generic PHY framework	2013-09-27 17:35:41 -07:00
pi-futex.txt	…
pinctrl.txt	pinctrl: Fix some typos and grammar issues in the documentation	2014-01-15 13:59:50 +01:00
pnp.txt	…
preempt-locking.txt	…
printk-formats.txt	vsprintf: add %pad extension for dma_addr_t use	2014-01-23 16:36:56 -08:00
pwm.txt	Documentation/pwm: Fix trivial typos	2013-10-24 10:51:33 +02:00
ramoops.txt	…
rbtree.txt	…
remoteproc.txt	…
rfkill.txt	doc: fix some typos in documentations	2013-12-02 14:45:19 +01:00
robust-futex-ABI.txt	Documentation/robust-futex-API: Count properly to 4	2013-11-30 14:08:28 +01:00
robust-futexes.txt	…
rpmsg.txt	Documentation: remove __dev* attributes.	2013-01-03 15:57:16 -08:00
rt-mutex-design.txt	doc: fix some typos in documentations	2013-12-02 14:45:19 +01:00
rt-mutex.txt	…
rtc.txt	rtc: add ability to push out an existing wakealarm using sysfs	2013-07-03 16:07:54 -07:00
serial-console.txt	…
sgi-ioc4.txt	…
sgi-visws.txt	…
smsc_ece1099.txt	…
sparse.txt	Documentation/sparse.txt: document context annotations for lock checking	2012-12-17 17:15:23 -08:00
spinlocks.txt	sched: Rename sched.c as sched/core.c in comments and Documentation	2013-06-19 12:58:42 +02:00
stable_api_nonsense.txt	…
stable_kernel_rules.txt	…
static-keys.txt	doc: fix some typos in documentations	2013-12-02 14:45:19 +01:00
svga.txt	…
sysfs-rules.txt	doc: Fix typo in doucmentations	2013-07-25 12:34:15 +02:00
sysrq.txt	sysrq: Allow magic SysRq key functions to be disabled through Kconfig	2013-10-16 13:01:44 -07:00
this_cpu_ops.txt	percpu: add documentation on this_cpu operations	2013-04-04 10:24:53 -07:00
unaligned-memory-access.txt	ether_addr_equal: Optimize implementation, remove unused compare_ether_addr	2013-12-06 16:37:43 -05:00
unicode.txt	…
unshare.txt	…
vfio.txt	vfio: fix documentation	2013-09-05 16:36:21 -06:00
vgaarbiter.txt	…
video-output.txt	…
vme_api.txt	VME: Rename vme_slot_get to avoid confusion with reference counting	2013-12-03 11:15:58 -08:00
volatile-considered-harmful.txt	…
workqueue.txt	workqueue: Correct/Drop references to gcwq in Documentation	2013-08-21 10:32:09 -04:00
ww-mutex-design.txt	mutex: Add support for wound/wait style locks	2013-06-26 12:10:56 +02:00
xz.txt	…
zorro.txt	zorro/UAPI: Disintegrate include/linux/zorro*.h	2013-11-26 11:09:08 +01:00