Some hardware error injection needs parameters, for example, it is
useful to specify memory address and memory address mask for memory
errors.
Some BIOSes allow parameters to be specified via an unpublished
extension. This patch adds support to it. The parameters will be
ignored on machines without necessary BIOS support.
Signed-off-by: Huang Ying <ying.huang@intel.com>
Signed-off-by: Andi Kleen <ak@linux.intel.com>
Signed-off-by: Len Brown <len.brown@intel.com>
ERST is a way provided by APEI to save and retrieve hardware error
record to and from some simple persistent storage (such as flash).
The Linux kernel support implementation is quite simple and workable
in NMI context. So it can be used to save hardware error record into
flash in hardware error exception or NMI handler, where other more
complex persistent storage such as disk is not usable. After saving
hardware error records via ERST in hardware error exception or NMI
handler, the error records can be retrieved and logged into disk or
network after a clean reboot.
For more information about ERST, please refer to ACPI Specification
version 4.0, section 17.4.
This patch incorporate fixes from Jin Dongming.
Signed-off-by: Huang Ying <ying.huang@intel.com>
Signed-off-by: Andi Kleen <ak@linux.intel.com>
CC: Jin Dongming <jin.dongming@np.css.fujitsu.com>
Signed-off-by: Len Brown <len.brown@intel.com>
Generic Hardware Error Source provides a way to report platform
hardware errors (such as that from chipset). It works in so called
"Firmware First" mode, that is, hardware errors are reported to
firmware firstly, then reported to Linux by firmware. This way, some
non-standard hardware error registers or non-standard hardware link
can be checked by firmware to produce more valuable hardware error
information for Linux.
Now, only SCI notification type and memory errors are supported. More
notification type and hardware error type will be added later. These
memory errors are reported to user space through /dev/mcelog via
faking a corrected Machine Check, so that the error memory page can be
offlined by /sbin/mcelog if the error count for one page is beyond the
threshold.
On some machines, Machine Check can not report physical address for
some corrected memory errors, but GHES can do that. So this simplified
GHES is implemented firstly.
Signed-off-by: Huang Ying <ying.huang@intel.com>
Signed-off-by: Andi Kleen <ak@linux.intel.com>
Signed-off-by: Len Brown <len.brown@intel.com>
CPER stands for Common Platform Error Record, it is the hardware error
record format used to describe platform hardware error by various APEI
tables, such as ERST, BERT and HEST etc.
For more information about CPER, please refer to Appendix N of UEFI
Specification version 2.3.
This patch mainly includes the data structure difinition header file
used by other files.
Signed-off-by: Huang Ying <ying.huang@intel.com>
Signed-off-by: Andi Kleen <ak@linux.intel.com>
Signed-off-by: Len Brown <len.brown@intel.com>
Hardware Error Device (PNP0C33) is used to report some hardware errors
notified via SCI, mainly the corrected errors. Some APEI Generic
Hardware Error Source (GHES) may use SCI on hardware error device to
notify hardware error to kernel.
After receiving notification from ACPI core, it is forwarded to all
listeners via a notifier chain. The listener such as APEI GHES should
check corresponding error source for new events when notified.
Signed-off-by: Huang Ying <ying.huang@intel.com>
Signed-off-by: Andi Kleen <ak@linux.intel.com>
Signed-off-by: Len Brown <len.brown@intel.com>
Now, a dedicated HEST tabling parsing code is used for PCIE AER
firmware_first setup. It is rebased on general HEST tabling parsing
code of APEI. The firmware_first setup code is moved from PCI core to
AER driver too, because it is only AER related.
Signed-off-by: Huang Ying <ying.huang@intel.com>
Signed-off-by: Andi Kleen <ak@linux.intel.com>
Reviewed-by: Hidetoshi Seto <seto.hidetoshi@jp.fujitsu.com>
Acked-by: Jesse Barnes <jbarnes@virtuousgeek.org>
Signed-off-by: Len Brown <len.brown@intel.com>
EINJ provides a hardware error injection mechanism, this is useful for
debugging and testing of other APEI and RAS features.
Signed-off-by: Huang Ying <ying.huang@intel.com>
Signed-off-by: Andi Kleen <ak@linux.intel.com>
Signed-off-by: Len Brown <len.brown@intel.com>
HEST describes error sources in detail; communicating operational
parameters (i.e. severity levels, masking bits, and threshold values)
to OS as necessary. It also allows the platform to report error
sources for which OS would typically not implement support (for
example, chipset-specific error registers).
HEST information may be needed by other subsystems. For example, HEST
PCIE AER error source information describes whether a PCIE root port
works in "firmware first" mode, this is needed by general PCIE AER
error subsystem. So a public HEST tabling parsing interface is
provided.
Signed-off-by: Huang Ying <ying.huang@intel.com>
Signed-off-by: Andi Kleen <ak@linux.intel.com>
Signed-off-by: Len Brown <len.brown@intel.com>
APEI stands for ACPI Platform Error Interface, which allows to report
errors (for example from the chipset) to the operating system. This
improves NMI handling especially. In addition it supports error
serialization and error injection.
For more information about APEI, please refer to ACPI Specification
version 4.0, chapter 17.
This patch provides some common functions used by more than one APEI
tables, mainly framework of interpreter for EINJ and ERST.
A machine readable language is defined for EINJ and ERST for OS to
execute, and so to drive the firmware to fulfill the corresponding
functions. The machine language for EINJ and ERST is compatible, so a
common framework is defined for them.
Signed-off-by: Huang Ying <ying.huang@intel.com>
Signed-off-by: Andi Kleen <ak@linux.intel.com>
Signed-off-by: Len Brown <len.brown@intel.com>
Some ACPI IO accessing need to be done in atomic context. For example,
APEI ERST operations may be used for permanent storage in hardware
error handler. That is, it may be called in atomic contexts such as
IRQ or NMI, etc. And, ERST/EINJ implement their operations via IO
memory/port accessing. But the IO memory accessing method provided by
ACPI (acpi_read/acpi_write) maps the IO memory during it is accessed,
so it can not be used in atomic context. To solve the issue, the IO
memory should be pre-mapped during EINJ/ERST initializing. A linked
list is used to record which memory area has been mapped, when memory
is accessed in hardware error handler, search the linked list for the
mapped virtual address from the given physical address.
Signed-off-by: Huang Ying <ying.huang@intel.com>
Signed-off-by: Andi Kleen <ak@linux.intel.com>
Signed-off-by: Len Brown <len.brown@intel.com>
As we were using an internal dma flushing routine, this patch changes to
the DMA API flush_kernel_dcache_page(). Driver is able to compile now.
[akpm@linux-foundation.org: flush_kernel_dcache_page() comes before kunmap_atomic()]
Signed-off-by: Nicolas Ferre <nicolas.ferre@atmel.com>
Cc: James Bottomley <James.Bottomley@HansenPartnership.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs-2.6:
JFS: Free sbi memory in error path
fs/sysv: dereferencing ERR_PTR()
Fix double-free in logfs
Fix the regression created by "set S_DEAD on unlink()..." commit
1) i_flags simply doesn't work for mount/unlink race prevention;
we may have many links to file and rm on one of those obviously
shouldn't prevent bind on top of another later on. To fix it
right way we need to mark _dentry_ as unsuitable for mounting
upon; new flag (DCACHE_CANT_MOUNT) is protected by d_flags and
i_mutex on the inode in question. Set it (with dont_mount(dentry))
in unlink/rmdir/etc., check (with cant_mount(dentry)) in places
in namespace.c that used to check for S_DEAD. Setting S_DEAD
is still needed in places where we used to set it (for directories
getting killed), since we rely on it for readdir/rmdir race
prevention.
2) rename()/mount() protection has another bogosity - we unhash
the target before we'd checked that it's not a mountpoint. Fixed.
3) ancient bogosity in pivot_root() - we locked i_mutex on the
right directory, but checked S_DEAD on the different (and wrong)
one. Noticed and fixed.
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
* master.kernel.org:/home/rmk/linux-2.6-arm:
ARM: 6126/1: ARM mpcore_wdt: fix build failure and other fixes
ARM: 6125/1: ARM TWD: move TWD registers to common header
ARM: 6110/1: Fix Thumb-2 kernel builds when UACCESS_WITH_MEMCPY is enabled
ARM: 6112/1: Use the Inner Shareable I-cache and BTB ops on ARMv7 SMP
ARM: 6111/1: Implement read/write for ownership in the ARMv6 DMA cache ops
ARM: 6106/1: Implement copy_to_user_page() for noMMU
ARM: 6105/1: Fix the __arm_ioremap_caller() definition in nommu.c
The imx CTS trigger level is left at its reset value that is 32
chars. Since the RX FIFO has 32 entries, when CTS is raised, the
FIFO already is full. However, some serial port devices first empty
their TX FIFO before stopping when CTS is raised, resulting in lost
chars.
This patch sets the trigger level lower so that other chars arrive
after CTS is raised, there is still room for 16 of them.
Signed-off-by: Valentin Longchamp<valentin.longchamp@epfl.ch>
Tested-by: Philippe Rétornaz<philippe.retornaz@epfl.ch>
Acked-by: Wolfram Sang<w.sang@pengutronix.de>
Cc: stable <stable@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Arnd noted:
After the "retry_open:" label, we first get the tty_mutex
and then the BKL. However a the end of tty_open, we jump
back to retry_open with the BKL still held. If we run into
this case, the tty_open function will be left with the BKL
still held.
Signed-off-by: Alan Cox <alan@linux.intel.com>
Acked-by: Arnd Bergmann <arnd@arndb.de>
Cc: stable <stable@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input:
Input: ad7877 - keep dma rx buffers in seperate cache lines
Input: psmouse - reset all types of mice before reconnecting
Input: elantech - use all 3 bytes when checking version
Input: iforce - fix Guillemot Jet Leader 3D entry
Input: iforce - add Guillemot Jet Leader Force Feedback
In certain circumstances, especially under heavy load, the AUXADC
completion interrupt may be detected after we've timed out waiting for
it. That conversion would still succeed but the next conversion will
see the completion that was signalled by the interrupt for the previous
conversion and therefore not wait for the AUXADC conversion to run,
causing it to report failure.
Provide a simple, non-invasive cleanup by using try_wait_for_completion()
to ensure that the completion is not signalled before we wait. Since
the AUXADC is run within a mutex we know there can only have been at
most one AUXADC interrupt outstanding. A more involved change should
follow for the next merge window.
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
With dma based spi transmission, data corruption is observed
occasionally. With dma buffers located right next to msg and
xfer fields, cache lines correctly flushed in preparation for
dma usage may be polluted again when writing to fields in the
same cache line.
Make sure cache fields used with dma do not share cache lines
with fields changed during dma handling. As both fields are part
of a struct that is allocated via kzalloc, thus cache aligned,
moving the fields to the 1st position and insert padding for
alignment does the job.
Signed-off-by: Oskar Schirmer <os@emlix.com>
Signed-off-by: Daniel Glöckner <dg@emlix.com>
Signed-off-by: Oliver Schneidewind <osw@emlix.com>
Signed-off-by: Johannes Weiner <jw@emlix.com>
Acked-by: Mike Frysinger <vapier@gentoo.org>
[dtor@mail.ru - changed to use ___cacheline_aligned as suggested
by akpm]
Signed-off-by: Dmitry Torokhov <dtor@mail.ru>
Synaptics hardware requires resetting device after suspend to ram
in order for the device to be operational. The reset lives in
synaptics-specific reconnect handler, but it is not being invoked
if synaptics support is disabled and the device is handled as a
standard PS/2 device (bare or IntelliMouse protocol).
Let's add reset into generic reconnect handler as well.
Signed-off-by: Dmitry Torokhov <dtor@mail.ru>
Apparently all 3 bytes returned by ETP_FW_VERSION_QUERY are significant
and should be taken into account when matching hardware version/features.
Tested-by: Eric Piel <eric.piel@tremplin-utc.net>
Signed-off-by: Dmitry Torokhov <dtor@mail.ru>
* 'for-linus' of git://git390.marist.edu/pub/scm/linux-2.6:
[S390] correct address of _stext with CONFIG_SHARED_KERNEL=y
[S390] ptrace: fix return value of do_syscall_trace_enter()
[S390] dasd: fix race between tasklet and dasd_sleep_on
This reverts commit 977d17bb17, because it
can cause problems with some devices not getting any resources at all
when the resource tree is re-allocated.
For an example of this, see
https://bugzilla.kernel.org/show_bug.cgi?id=15960
(originally https://bugtrack.alsa-project.org/alsa-bug/view.php?id=4982)
(lkml thread: http://lkml.org/lkml/2010/4/19/20)
where Peter Henriksson reported his Xonar DX sound card gone, because
the IO port region was no longer allocated.
Reported-bisected-and-tested-by: Peter Henriksson <peter.henriksson@gmail.com>
Requested-by: Andrew Morton <akpm@linux-foundation.org>
Requested-by: Clemens Ladisch <clemens@ladisch.de>
Acked-by: Jesse Barnes <jbarnes@virtuousgeek.org>
Cc: Yinghai Lu <yinghai@kernel.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
According to memory-barriers.txt, an smp memory barrier in guest
should always be paired with an smp memory barrier in host,
and I quote "a lack of appropriate pairing is almost certainly an
error". In case of vhost, failure to flush out used index
update before looking at the interrupt disable flag
could result in missed interrupts, resulting in
networking hang under stress.
This might happen when flags read bypasses used index write.
So we see interrupts disabled and do not interrupt, at the
same time guest writes flags value to enable interrupt,
reads an old used index value, thinks that
used ring is empty and waits for interrupt.
Note: the barrier we pair with here is in
drivers/virtio/virtio_ring.c, function
vring_enable_cb.
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Acked-by: Juan Quintela <quintela@redhat.com>
This fixes the build failures seen when building mpcore_wdt and it
also removes the nonexistent ARM_MPCORE_PLATFORM dependency, instead
make it dependent on HAVE_ARM_TWD.
Also this fixes spinlock usage appropriately.
Signed-off-by: srinidhi kasagar <srinidhi.kasagar@stericsson.com>
Acked-by: Linus Walleij <linus.walleij@stericsson.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
The various dasd_sleep_on functions use a global wait queue when
waiting for a cqr. The wait condition checks the status and devlist
fields of the cqr to determine if it is safe to continue. This
evaluation may return true, although the tasklet has not finished
processing of the cqr and the callback function has not been called
yet. When the callback is finally called, the data in the cqr may
already be invalid. The sleep_on wait condition needs a safe way to
determine if the tasklet has finished processing. Use the
callback_data field of the cqr to store a token, which is set by
the callback function itself.
Cc: <stable@kernel.org>
Signed-off-by: Stefan Weinhuber <wein@de.ibm.com>
Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
The ACPI spec tells us that the firmware will reenable SCI_EN on resume.
Reality disagrees in some cases. The ACPI spec tells us that the only way
to set SCI_EN is via an SMM call.
https://bugzilla.kernel.org/show_bug.cgi?id=13745 shows us that doing so
may break machines. Tracing the ACPI calls made by Windows shows that it
unconditionally sets SCI_EN on resume with a direct register write, and
therefore the overwhelming probability is that everything is fine with
this behaviour.
Signed-off-by: Matthew Garrett <mjg@redhat.com>
Tested-by: Rafael J. Wysocki <rjw@sisk.pl>
Signed-off-by: Len Brown <len.brown@intel.com>
acpi_hw_set_mode() double checks its effectiveness
by calling acpi_hw_get_mode() -- polling up to 3 seconds.
It would be more logical for its caller, acpi_enable()
acpi_enable() to do the double-checking. (lets assume
that acpi_disable() isn't interesting)
The ACPI specification is unclear on this point.
Some parts say that the BIOS sets SCI_EN and then returns to the OS,
but one part says "OSPM polls the SCI_EN bit until it is sampled SET".
The systems I have on hand do the former,
SCI_EN is observed to be set upon return from the BIOS.
So we move the check up out of acpi_hw_set_mode()
up into acpi_enable() where it makes logical sense.
Then we replace the 3-second polling loop
with a single check. If this check fails, we'll see:
"Hardware did not enter ACPI mode"
and the system will bail out of ACPI initialization
and likely fail to boot. If we see that in practice,
we can restore the polling, but put it into acpi_enable.
This patch is important if acpi_enable() is used in
the resume from S3 path. Many systems today are seen
coming back from S3 with SCI_EN off, and then failing
to set SCI_EN in response to acpi_enable(). Those systems
will take 3 seconds longer to resume due to this loop.
However, it is possible that we will not use acpi_enable()
in the S3 resume path, and bang SCI_EN directly, which
would make the loop harmless, as it would be invisible
to all systems except those that need it.
Signed-off-by: Len Brown <len.brown@intel.com>
i915_error_object_create() is called from the timer interrupt and hence
can corrupt the KM_USER0 slot. Use KM_IRQ0 instead.
Reported-by: Jaswinder Singh Rajput <jaswinderlinux@gmail.com>
Tested-by: Jaswinder Singh Rajput <jaswinderlinux@gmail.com>
Acked-by: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Dave Airlie <airlied@linux.ie>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
The work queue has to be flushed after the device has been made
inaccessible. The patch closes a window during which a work queue might
remain active after the device is removed and would then lead to ACPI
calls with undefined behavior.
Signed-off-by: Oliver Neukum <oneukum@suse.de>
Acked-by: Eric Piel <eric.piel@tremplin-utc.net>
Acked-by: Pavel Machek <pavel@ucw.cz>
Cc: Pavel Herrmann <morpheus.ibis@gmail.com>
Cc: <stable@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
The current allocation does not include the memory required for blanking
lines. So avoid memory corruption when multiple devices are using the DMA
memory near each other.
Signed-off-by: Michael Hennerich <michael.hennerich@analog.com>
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
Cc: <stable@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
In debugfs, printing of command response reports resp[2] twice: fix it to
resp[3].
Signed-off-by: Nicolas Ferre <nicolas.ferre@atmel.com>
Haavard Skinnemoen <hskinnemoen@atmel.com>
Cc: <linux-mmc@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Disable data error interrupts while we are actually recording that there
is not such errors. This will prevent, in some cases, the warning message
printed at new request queuing (in atmci_start_request()).
Signed-off-by: Nicolas Ferre <nicolas.ferre@atmel.com>
Cc: Haavard Skinnemoen <hskinnemoen@atmel.com>
Cc: <linux-mmc@vger.kernel.org>
Cc: <stable@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
The removing of an SD card in certain circumstances can lead to a kernel
oops if we do not make sure that the "data" field of the host structure is
valid. This patch adds a test in atmci_dma_cleanup() function and also
calls atmci_stop_dma() before throwing away the reference to data.
Signed-off-by: Nicolas Ferre <nicolas.ferre@atmel.com>
Cc: Haavard Skinnemoen <hskinnemoen@atmel.com>
Cc: <linux-mmc@vger.kernel.org>
Cc: <stable@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Two parameters were swapped in the calls to atmci_init_slot().
Signed-off-by: Nicolas Ferre <nicolas.ferre@atmel.com>
Reported-by: Anders Grahn <anders.grahn@hd-wireless.se>
Cc: Haavard Skinnemoen <hskinnemoen@atmel.com>
Cc: <linux-mmc@vger.kernel.org>
Cc: <stable@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
The SIO chip contains 16 possible gpio lines, not 14. The schematic was
not read carefully.
Signed-off-by: Denis Turischev <denis@compulab.co.il>
Cc: David Brownell <david-b@pacbell.net>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-2.6:
net: Fix FDDI and TR config checks in ipv4 arp and LLC.
IPv4: unresolved multicast route cleanup
mac80211: remove association work when processing deauth request
ar9170: wait for asynchronous firmware loading
ipv4: udp: fix short packet and bad checksum logging
phy: Fix initialization in micrel driver.
sctp: Fix a race between ICMP protocol unreachable and connect()
veth: Dont kfree_skb() after dev_forward_skb()
IPv6: fix IPV6_RECVERR handling of locally-generated errors
net/gianfar: drop recycled skbs on MTU change
iwlwifi: work around passive scan issue
Duplicate entries ended up acpisleep_dmi_table[] by accident.
They don't hurt functionality, but they are ugly, so let's get
rid of them.
Cc: stable@kernel.org
Signed-off-by: Alex Chiang <achiang@canonical.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
The current code will not remove the sysfs files for fan numbers three
and up. Also, upon exit, fans one and two are removed regardless of
their existence. This patch cleans up the sysfs error handling for
the fans.
Signed-off-by: Henrik Rydberg <rydberg@euromail.se>
Signed-off-by: Jean Delvare <khali@linux-fr.org>
* Allow fan minimum RPM to be set to zero without triggering alarms.
* Fix voltage scaling arithmetic and correct scale factors.
* Correct fan1-fan4 alarm bit shifts.
* Correct register address for temp3_smoothing_enable.
* Read the alarm registers with high priority.
Signed-off-by: Ken Milmore <ken.milmore@googlemail.com>
Signed-off-by: Jean Delvare <khali@linux-fr.org>
USB ID entry for "Guillemot Jet Leader 3D" in iforce-main.c did not match
one used in iforce-usb.c
Signed-off-by: Marek Vasut <marek.vasut@gmail.com>
Signed-off-by: Dmitry Torokhov <dtor@mail.ru>
