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So basically this function copies EFI memmap stuff from boot_params into
the EFI memmap descriptor and reserves memory for it. Make it much more
readable.
Signed-off-by: Borislav Petkov <bp@suse.de>
Cc: Matthew Garret <mjg59@srcf.ucam.org>
Signed-off-by: Matt Fleming <matt.fleming@intel.com>
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This removes an open coded simple_open() function and
replaces file operations references to the function
with simple_open() instead.
Signed-off-by: Wei Yongjun <yongjun_wei@trendmicro.com.cn>
Cc: Jeremy Kerr <jk@ozlabs.org>
Cc: Matthew Garret <mjg59@srcf.ucam.org>
Signed-off-by: Matt Fleming <matt.fleming@intel.com>
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The check, "IS_ENABLED(CONFIG_X86_64) != efi_enabled(EFI_64BIT)",
in setup_arch() can be replaced by efi_is_enabled(). This change
remove duplicate code and improve readability.
Signed-off-by: Satoru Takeuchi <takeuchi_satoru@jp.fujitsu.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: "H. Peter Anvin" <hpa@zytor.com>
Cc: Olof Johansson <olof@lixom.net>
Signed-off-by: Matt Fleming <matt.fleming@intel.com>
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It makes no sense to treat the following filenames as unique,
VarName-abcdefab-abcd-abcd-abcd-abcdefabcdef
VarName-ABCDEFAB-ABCD-ABCD-ABCD-ABCDEFABCDEF
VarName-ABcDEfAB-ABcD-ABcD-ABcD-ABcDEfABcDEf
VarName-aBcDEfAB-aBcD-aBcD-aBcD-aBcDEfaBcDEf
... etc ...
since the guid will be converted into a binary representation, which
has no case.
Roll our own dentry operations so that we can treat the variable name
part of filenames ("VarName" in the above example) as case-sensitive,
but the guid portion as case-insensitive. That way, efivarfs will
refuse to create the above files if any one already exists.
Reported-by: Lingzhu Xiang <lxiang@redhat.com>
Cc: Matthew Garrett <mjg59@srcf.ucam.org>
Cc: Jeremy Kerr <jeremy.kerr@canonical.com>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Matt Fleming <matt.fleming@intel.com>
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The only thing that efivarfs does to enforce a valid filename is
ensure that the name isn't too short. We need to strongly sanitise any
filenames, not least because variable creation is delayed until
efivarfs_file_write(), which means we can't rely on the firmware to
inform us of an invalid name, because if the file is never written to
we'll never know it's invalid.
Perform a couple of steps before agreeing to create a new file,
* hex_to_bin() returns a value indicating whether or not it was able
to convert its arguments to a binary representation - we should
check it.
* Ensure that the GUID portion of the filename is the correct length
and format.
* The variable name portion of the filename needs to be at least one
character in size.
Reported-by: Lingzhu Xiang <lxiang@redhat.com>
Cc: Matthew Garrett <mjg59@srcf.ucam.org>
Cc: Jeremy Kerr <jeremy.kerr@canonical.com>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Matt Fleming <matt.fleming@intel.com>
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Instead of adding a magic 4 to the variable size, use sizeof() to make
it explicitly clear what the quantity represents (the variable's
attributes).
CC: Jeremy Kerr <jeremy.kerr@canonical.com>
Cc: Chun-Yi Lee <joeyli.kernel@gmail.com>
Cc: Andy Whitcroft <apw@canonical.com>
Reported-by: Lingzhu Xiang <lxiang@redhat.com>
Signed-off-by: Matt Fleming <matt.fleming@intel.com>
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When initrd file didn't put at the same place with stub kernel, we
need give the file path of initrd, but need use backslash to separate
directory and file. It's not friendly to unix/linux user, and not so
intuitive for bootloader forward paramters to efi stub kernel by
chainloading.
This patch add support to handle_ramdisks for allow slash in file path
of initrd, it convert slash to backlash when parsing path.
In additional, this patch also separates print code of efi_char16_t from
efi_printk, and print out the path/filename of initrd when failed to open
initrd file. It's good for debug and discover typo.
Cc: Matthew Garrett <mjg59@srcf.ucam.org>
Cc: H. Peter Anvin <hpa@zytor.com>
Signed-off-by: Lee, Chun-Yi <jlee@suse.com>
Signed-off-by: Matt Fleming <matt.fleming@intel.com>
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git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull x86 EFI fixes from Peter Anvin:
"This is a collection of fixes for the EFI support. The controversial
bit here is a set of patches which bumps the boot protocol version as
part of fixing some serious problems with the EFI handover protocol,
used when booting under EFI using a bootloader as opposed to directly
from EFI. These changes should also make it a lot saner to support
cross-mode 32/64-bit EFI booting in the future. Getting these changes
into 3.8 means we avoid presenting an inconsistent ABI to bootloaders.
Other changes are display detection and fixing efivarfs."
* 'x86-efi-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
x86, efi: remove attribute check from setup_efi_pci
x86, build: Dynamically find entry points in compressed startup code
x86, efi: Fix PCI ROM handing in EFI boot stub, in 32-bit mode
x86, efi: Fix 32-bit EFI handover protocol entry point
x86, efi: Fix display detection in EFI boot stub
x86, boot: Define the 2.12 bzImage boot protocol
x86/boot: Fix minor fd leakage in tools/relocs.c
x86, efi: Set runtime_version to the EFI spec revision
x86, efi: fix 32-bit warnings in setup_efi_pci()
efivarfs: Delete dentry from dcache in efivarfs_file_write()
efivarfs: Never return ENOENT from firmware
efi, x86: Pass a proper identity mapping in efi_call_phys_prelog
efivarfs: Drop link count of the right inode
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git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull x86 fixes from Peter Anvin:
"This is a collection of miscellaneous fixes, the most important one is
the fix for the Samsung laptop bricking issue (auto-blacklisting the
samsung-laptop driver); the efi_enabled() changes you see below are
prerequisites for that fix.
The other issues fixed are booting on OLPC XO-1.5, an UV fix, NMI
debugging, and requiring CAP_SYS_RAWIO for MSR references, just as
with I/O port references."
* 'x86-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
samsung-laptop: Disable on EFI hardware
efi: Make 'efi_enabled' a function to query EFI facilities
smp: Fix SMP function call empty cpu mask race
x86/msr: Add capabilities check
x86/dma-debug: Bump PREALLOC_DMA_DEBUG_ENTRIES
x86/olpc: Fix olpc-xo1-sci.c build errors
arch/x86/platform/uv: Fix incorrect tlb flush all issue
x86-64: Fix unwind annotations in recent NMI changes
x86-32: Start out cr0 clean, disable paging before modifying cr3/4
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Pull console lockdep checking revert from Dave Airlie.
The lockdep splat this showed was interesting, but it's very very old,
and we won't be fixing it until 3.9. In the meantime, undo the lockdep
annotation so that we don't generate the (known) console lockdep issue,
and then possibly hide any potential other (unknown) lockdep problems
that got disabled by the first one that triggered.
* 'drm-fixes' of git://people.freedesktop.org/~airlied/linux:
Revert "console: implement lockdep support for console_lock"
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This reverts commit daee779718a319ff9f83e1ba3339334ac650bb22.
I'll requeue this after the console locking fixes, so lockdep
is useful again for people until fbcon is fixed.
Signed-off-by: Dave Airlie <airlied@redhat.com>
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Various urgent EFI fixes and some warning cleanups for v3.8
* EFI boot stub fix for Macbook Pro's from Maarten Lankhorst
* Fix an oops in efivarfs from Lingzhu Xiang
* 32-bit warning cleanups from Jan Beulich
* Patch to Boot on >512GB RAM systems from Nathan Zimmer
* Set efi.runtime_version correctly
* efivarfs updates
Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
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It has been reported that running this driver on some Samsung laptops
with EFI can cause those machines to become bricked as detailed in the
following report,
https://bugs.launchpad.net/ubuntu-cdimage/+bug/1040557
There have also been reports of this driver causing Machine Check
Exceptions on recent EFI-enabled Samsung laptops,
https://bugzilla.kernel.org/show_bug.cgi?id=47121
So disable it if booting from EFI since this driver relies on
grovelling around in the BIOS memory map which isn't going to work.
Cc: Corentin Chary <corentincj@iksaif.net>
Cc: Matthew Garrett <mjg59@srcf.ucam.org>
Cc: Colin Ian King <colin.king@canonical.com>
Cc: Steve Langasek <steve.langasek@canonical.com>
Cc: <stable@vger.kernel.org>
Signed-off-by: Matt Fleming <matt.fleming@intel.com>
Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
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Originally 'efi_enabled' indicated whether a kernel was booted from
EFI firmware. Over time its semantics have changed, and it now
indicates whether or not we are booted on an EFI machine with
bit-native firmware, e.g. 64-bit kernel with 64-bit firmware.
The immediate motivation for this patch is the bug report at,
https://bugs.launchpad.net/ubuntu-cdimage/+bug/1040557
which details how running a platform driver on an EFI machine that is
designed to run under BIOS can cause the machine to become
bricked. Also, the following report,
https://bugzilla.kernel.org/show_bug.cgi?id=47121
details how running said driver can also cause Machine Check
Exceptions. Drivers need a new means of detecting whether they're
running on an EFI machine, as sadly the expression,
if (!efi_enabled)
hasn't been a sufficient condition for quite some time.
Users actually want to query 'efi_enabled' for different reasons -
what they really want access to is the list of available EFI
facilities.
For instance, the x86 reboot code needs to know whether it can invoke
the ResetSystem() function provided by the EFI runtime services, while
the ACPI OSL code wants to know whether the EFI config tables were
mapped successfully. There are also checks in some of the platform
driver code to simply see if they're running on an EFI machine (which
would make it a bad idea to do BIOS-y things).
This patch is a prereq for the samsung-laptop fix patch.
Cc: David Airlie <airlied@linux.ie>
Cc: Corentin Chary <corentincj@iksaif.net>
Cc: Matthew Garrett <mjg59@srcf.ucam.org>
Cc: Dave Jiang <dave.jiang@intel.com>
Cc: Olof Johansson <olof@lixom.net>
Cc: Peter Jones <pjones@redhat.com>
Cc: Colin Ian King <colin.king@canonical.com>
Cc: Steve Langasek <steve.langasek@canonical.com>
Cc: Tony Luck <tony.luck@intel.com>
Cc: Konrad Rzeszutek Wilk <konrad@kernel.org>
Cc: Rafael J. Wysocki <rjw@sisk.pl>
Cc: <stable@vger.kernel.org>
Signed-off-by: Matt Fleming <matt.fleming@intel.com>
Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
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Pull EDAC fixlets from Borislav Petkov:
"Two minor correctness fixlets from Dan Carpenter and Joe Perches each."
* tag 'edac_for_3.8' of git://git.kernel.org/pub/scm/linux/kernel/git/bp/bp:
EDAC: Fix kcalloc argument order
EDAC: Test correct variable in ->store function
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git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound
Pull sound fixes from Takashi Iwai:
- A collection of small ASoC driver fixes (error path fixes, register
correction, regulator bypass mode fix, etc)
- A few regression fixes and quirks of HD-audio (wrong page attributes
for SG-buffer, Poulsbo/Oaktrail controller fix, digital mic fix for
Acer, etc)
- A fix for USB-audio UAC2 devices wrt FU length check
* tag 'sound-3.8' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound:
ALSA: hda - Fix non-snoop page handling
ALSA: hda - Enable LPIB delay count for Poulsbo / Oaktrail
ALSA: hda - fix inverted internal mic on Acer AOA150/ZG5
ALSA: usb-audio: fix invalid length check for RME and other UAC 2 devices
ALSA: hda - Add a fixup for Packard-Bell desktop with ALC880
ASoC: wm_adsp: Release firmware on error
ASoC: wm_adsp: Use GFP_DMA for things that may be DMAed
ASoC: arizona: Use actual rather than desired BCLK when calculating LRCLK
ASoC: wm2200: correct mixer values and text
ASoC: MAINTAINERS: Update email address.
ASoC: wm5110: Correct AEC loopback mask
ASoC: wm5102: Correct AEC loopback mask
ASoC: dapm: Fix sense of regulator bypass mode
ASoC: fsl: fix multiple definition of init_module
ASoC: arizona: Disable free-running mode on FLL1
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First number, then size.
Signed-off-by: Joe Perches <joe@perches.com>
Cc: <stable@vger.kernel.org>
Signed-off-by: Borislav Petkov <bp@suse.de>
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We're testing for ->show but calling ->store().
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Cc: stable@vger.kernel.org
Signed-off-by: Borislav Petkov <bp@suse.de>
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Pull drm fixes from Dave Airlie:
"Intel, radeon and exynos fixes. Nothing too major or wierd: one dmar
fix and a radeon cursor corruption, along with misc exynos fixes."
* 'drm-fixes' of git://people.freedesktop.org/~airlied/linux: (21 commits)
drm/exynos: add check for the device power status
drm/exynos: Make 'drm_hdmi_get_edid' static
drm/exynos: fimd and ipp are broken on multiplatform
drm/exynos: don't include plat/gpio-cfg.h
drm/exynos: Remove "internal" interrupt handling
drm/exynos: Add missing static specifiers in exynos_drm_rotator.c
drm/exynos: Replace mdelay with usleep_range
drm/exynos: Make ipp_handle_cmd_work static
drm/exynos: Make g2d_userptr_get_dma_addr static
drm/exynos: consider DMA_NONE flag to dmabuf import
drm/exynos: free sg object if dma_map_sg is failed
drm/exynos: added validation of edid for vidi connection
drm/exynos: let drm handle edid allocations
drm/radeon: Enable DMA_IB_SWAP_ENABLE on big endian hosts.
drm/radeon: fix a rare case of double kfree
radeon_display: Use pointer return error codes
drm/radeon: fix cursor corruption on DCE6 and newer
drm/i915: dump UTS_RELEASE into the error_state
iommu/intel: disable DMAR for g4x integrated gfx
drm/i915: GFX_MODE Flush TLB Invalidate Mode must be '1' for scanline waits
...
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Pull xfs bugfixes from Ben Myers:
"Here are fixes for returning EFSCORRUPTED on probe of a non-xfs
filesystem, the stack switch in xfs_bmapi_allocate, a crash in
_xfs_buf_find, speculative preallocation as the filesystem nears
ENOSPC, an unmount hang, a race with AIO, and a regression with
xfs_fsr:
- fix return value when filesystem probe finds no XFS magic, a
regression introduced in 9802182.
- fix stack switch in __xfs_bmapi_allocate by moving the check for
stack switch up into xfs_bmapi_write.
- fix oops in _xfs_buf_find by validating that the requested block is
within the filesystem bounds.
- limit speculative preallocation near ENOSPC.
- fix an unmount hang in xfs_wait_buftarg by freeing the
xfs_buf_log_item in xfs_buf_item_unlock.
- fix a possible use after free with AIO.
- fix xfs_swap_extents after removal of xfs_flushinval_pages, a
regression introduced in commit fb59581404a."
* tag 'for-linus-v3.8-rc6' of git://oss.sgi.com/xfs/xfs:
xfs: Fix xfs_swap_extents() after removal of xfs_flushinval_pages()
xfs: Fix possible use-after-free with AIO
xfs: fix shutdown hang on invalid inode during create
xfs: limit speculative prealloc near ENOSPC thresholds
xfs: fix _xfs_buf_find oops on blocks beyond the filesystem end
xfs: pull up stack_switch check into xfs_bmapi_write
xfs: Do not return EFSCORRUPTED when filesystem probe finds no XFS magic
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git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux
Pull one s390 fix from Martin Schwidefsky:
"Another transparent huge page fix, we need to define a s390 variant
for pmdp_set_wrprotect to flush the TLB for the huge page correctly."
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux:
s390/thp: implement pmdp_set_wrprotect()
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git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-pinctrl
Pull pinctrl fixes from Linus Walleij:
"This is a late pinctrl fix pull request, we had to revert out the
pinctrl-single GPIO backend, because of, well, design issues. We're
cooking a better thing for the next cycle.
- Revert gpio request/free backend, new patch set in the works, will
be for v3.9. Get this old cruft out before anyone hurts himself on
it.
- Kconfig buzz
- Various compile warnings
- MPP6 value for the Kirkwood"
* tag 'pinctrl-fixes-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-pinctrl:
pinctrl: nomadik: nmk_prcm_gpiocr_get_mode may be unused
pinctrl: exynos: don't mark probing functions as __init
Revert "pinctrl: single: support gpio request and free"
pinctrl: mvebu: fix MPP6 value for kirkwood driver
pinctrl: mvebu: Fix compiler warnings
pinctrl: pinctrl-mxs: Fix variables' definition type
pinctrl: samsung: removing duplicated condition for PINCTRL_SAMSUNG
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nmk_prcm_gpiocr_get_mode is only needed for debugfs output at
the moment, which can be compile-time disabled. Marking
the function __maybe_unused still gives us compile-time
coverage, but avoids a gcc warning.
Without this patch, building nhk8815_defconfig results in:
drivers/pinctrl/pinctrl-nomadik.c:676:12: warning: 'nmk_prcm_gpiocr_get_mode' defined but not used [-Wunused-function]
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Cc: Jean-Nicolas Graux <jean-nicolas.graux@stericsson.com>
Cc: Srinidhi Kasagar <srinidhi.kasagar@stericsson.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
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Functions called from a driver probe() method must not be
marked __init, because they may get called after the
init phase is done, when the device shows up late, or
because of deferred probing.
Without this patch, building exynos_defconfig results in
multiple warnings like:
WARNING: drivers/pinctrl/built-in.o(.text+0x51bc): Section mismatch in reference from the function exynos5440_pinctrl_probe() to the function .init.text:exynos5440_gpiolib_register()
The function exynos5440_pinctrl_probe() references
the function __init exynos5440_gpiolib_register().
This is often because exynos5440_pinctrl_probe lacks a __init
annotation or the annotation of exynos5440_gpiolib_register is wrong.
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Cc: Tomasz Figa <t.figa@samsung.com>
Acked-by: Kukjin Kim <kgene.kim@samsung.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
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It looks like the original commit that copied the rom contents from
efi always copied the rom, and the fixup in setup_efi_pci from commit
886d751a2ea99a160 ("x86, efi: correct precedence of operators in
setup_efi_pci") broke that.
This resulted in macbook pro's no longer finding the rom images, and
thus not being able to use the radeon card any more.
The solution is to just remove the check for now, and always copy the
rom if available.
Reported-by: Vitaly Budovski <vbudovski+news@gmail.com>
Cc: Dan Carpenter <dan.carpenter@oracle.com>
Cc: Seth Forshee <seth.forshee@canonical.com>
Acked-by: Matthew Garrett <mjg59@srcf.ucam.org>
Cc: Bjorn Helgaas <bhelgaas@google.com>
Cc: Sasha Levin <sasha.levin@oracle.com>
Signed-off-by: Maarten Lankhorst <maarten.lankhorst@canonical.com>
Signed-off-by: Matt Fleming <matt.fleming@intel.com>
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For non-snoop mode, we fiddle with the page attributes of CORB/RIRB
and the position buffer, but also the ring buffers. The problem is
that the current code blindly assumes that the buffer is contiguous.
However, the ring buffers may be SG-buffers, thus a wrong vmapped
address is passed there, leading to Oops.
This patch fixes the handling for SG-buffers.
Bugzilla: https://bugzilla.novell.com/show_bug.cgi?id=800701
Cc: <stable@vger.kernel.org>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
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Currently we use LPIB forcibly for both playback and capture for
Poulsbo and Oaktrail devices, and this seems rather problematic.
The recent fix for LPIB delay count seems working well with these
devices, so let's enable it instead.
Reported-by: Martin Weishart <martin.weishart@telosalliance.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
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git://git.kernel.org/pub/scm/linux/kernel/git/broonie/regulator
Pull regulator fixes from Mark Brown:
"Fairly small stuff - a build failure fix for ST platforms, an error
checking fix and an update to the MAINTAINERS file for Liam."
* tag 'regulator-3.8-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/broonie/regulator:
regulator: tps80031: Use IS_ERR to check return value of regulator_register()
regulators: db8500: Fix compile failure for drivers/regulator/dbx500-prcmu.c
regulator: MAINTAINERS: update email address
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git://git.kernel.org/pub/scm/linux/kernel/git/benh/powerpc
Pull powerpc fixes from Benjamin Herrenschmidt:
"Whenever you have a chance between two dives, you might want to
consider pulling my merge branch to pickup a few fixes for 3.8 that
have been accumulating for the last couple of weeks (I was myself
travelling then on vacation).
Nothing major, just a handful of powerpc bug fixes that I consider
worth getting in before 3.8 goes final."
And I'll have everybody know that I'm not diving for several days yet.
Snif.
* 'merge' of git://git.kernel.org/pub/scm/linux/kernel/git/benh/powerpc:
powerpc: Max next_tb to prevent from replaying timer interrupt
powerpc: kernel/kgdb.c: Fix memory leakage
powerpc/book3e: Disable interrupt after preempt_schedule_irq
powerpc/oprofile: Fix error in oprofile power7_marked_instr_event() function
powerpc/pasemi: Fix crash on reboot
powerpc: Fix MAX_STACK_TRACE_ENTRIES too low warning for ppc32
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With lazy interrupt, we always call __check_irq_replaysome with
decrementers_next_tb to check if we need to replay timer interrupt.
So in hotplug case we also need to set decrementers_next_tb as MAX
to make sure __check_irq_replay don't replay timer interrupt
when return as we expect, otherwise we'll trap here infinitely.
Signed-off-by: Tiejun Chen <tiejun.chen@windriver.com>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
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the variable backup_current_thread_info isn't freed before existing the
function.
Signed-off-by: Cong Ding <dinggnu@gmail.com>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
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In preempt case current arch_local_irq_restore() from
preempt_schedule_irq() may enable hard interrupt but we really
should disable interrupts when we return from the interrupt,
and so that we don't get interrupted after loading SRR0/1.
Signed-off-by: Tiejun Chen <tiejun.chen@windriver.com>
CC: <stable@vger.kernel.org>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
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The calculation for the left shift of the mask OPROFILE_PM_PMCSEL_MSK has an
error. The calculation is should be to shift left by (max_cntrs - cntr) times
the width of the pmsel field width. However, the #define OPROFILE_MAX_PMC_NUM
was used instead of OPROFILE_PMSEL_FIELD_WIDTH. This patch fixes the
calculation.
Signed-off-by: Carl Love <cel@us.ibm.com>
Acked-by: Paul Mackerras <paulus@samba.org>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
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commit f96972f2dc "kernel/sys.c: call disable_nonboot_cpus() in
kernel_restart()"
added a call to disable_nonboot_cpus() on kernel_restart(), which tries
to shutdown all the CPUs except the first one. The issue with the PA
Semi, is that it does not support CPU hotplug.
When the call is made to __cpu_down(), it calls the notifiers
CPU_DOWN_PREPARE, and then tries to take the CPU down.
One of the notifiers to the CPU hotplug code, is the cpufreq. The
DOWN_PREPARE will call __cpufreq_remove_dev() which calls
cpufreq_driver->exit. The PA Semi exit handler unmaps regions of I/O
that is used by an interrupt that goes off constantly
(system_reset_common, but it goes off during normal system operations
too). I'm not sure exactly what this interrupt does.
Running a simple function trace, you can see it goes off quite a bit:
# tracer: function
#
# TASK-PID CPU# TIMESTAMP FUNCTION
# | | | | |
<idle>-0 [001] 1558.859363: .pasemi_system_reset_exception <-.system_reset_exception
<idle>-0 [000] 1558.860112: .pasemi_system_reset_exception <-.system_reset_exception
<idle>-0 [000] 1558.861109: .pasemi_system_reset_exception <-.system_reset_exception
<idle>-0 [001] 1558.861361: .pasemi_system_reset_exception <-.system_reset_exception
<idle>-0 [000] 1558.861437: .pasemi_system_reset_exception <-.system_reset_exception
When the region is unmapped, the system crashes with:
Disabling non-boot CPUs ...
Error taking CPU1 down: -38
Unable to handle kernel paging request for data at address 0xd0000800903a0100
Faulting instruction address: 0xc000000000055fcc
Oops: Kernel access of bad area, sig: 11 [#1]
PREEMPT SMP NR_CPUS=64 NUMA PA Semi PWRficient
Modules linked in: shpchp
NIP: c000000000055fcc LR: c000000000055fb4 CTR: c0000000000df1fc
REGS: c0000000012175d0 TRAP: 0300 Not tainted (3.8.0-rc4-test-dirty)
MSR: 9000000000009032 <SF,HV,EE,ME,IR,DR,RI> CR: 24000088 XER: 00000000
SOFTE: 0
DAR: d0000800903a0100, DSISR: 42000000
TASK = c0000000010e9008[0] 'swapper/0' THREAD: c000000001214000 CPU: 0
GPR00: d0000800903a0000 c000000001217850 c0000000012167e0 0000000000000000
GPR04: 0000000000000000 0000000000000724 0000000000000724 0000000000000000
GPR08: 0000000000000000 0000000000000000 0000000000000001 0000000000a70000
GPR12: 0000000024000080 c00000000fff0000 ffffffffffffffff 000000003ffffae0
GPR16: ffffffffffffffff 0000000000a21198 0000000000000060 0000000000000000
GPR20: 00000000008fdd35 0000000000a21258 000000003ffffaf0 0000000000000417
GPR24: 0000000000a226d0 c000000000000000 0000000000000000 0000000000000000
GPR28: c00000000138b358 0000000000000000 c000000001144818 d0000800903a0100
NIP [c000000000055fcc] .set_astate+0x5c/0xa4
LR [c000000000055fb4] .set_astate+0x44/0xa4
Call Trace:
[c000000001217850] [c000000000055fb4] .set_astate+0x44/0xa4 (unreliable)
[c0000000012178f0] [c00000000005647c] .restore_astate+0x2c/0x34
[c000000001217980] [c000000000054668] .pasemi_system_reset_exception+0x6c/0x88
[c000000001217a00] [c000000000019ef0] .system_reset_exception+0x48/0x84
[c000000001217a80] [c000000000001e40] system_reset_common+0x140/0x180
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
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Pull dmraid fix from NeilBrown:
"Just one fix for md in 3.8
dmraid assess redundancy and replacements slightly inaccurately which
could lead to some degraded arrays failing to assemble."
* tag 'md-3.8-fixes' of git://neil.brown.name/md:
DM-RAID: Fix RAID10's check for sufficient redundancy
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This patch fixes MAX_STACK_TRACE_ENTRIES too low warning for ppc32,
which is similar to commit 12660b17.
Reported-by: Christian Kujau <lists@nerdbynature.de>
Signed-off-by: Li Zhong <zhong@linux.vnet.ibm.com>
Tested-by: Christian Kujau <lists@nerdbynature.de>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
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Commit fb59581404ab7ec5075299065c22cb211a9262a9 removed
xfs_flushinval_pages() and changed its callers to use
filemap_write_and_wait() and truncate_pagecache_range() directly.
But in xfs_swap_extents() this change accidental switched the argument
for 'tip' to 'ip'. This patch switches it back to 'tip'
Signed-off-by: Torsten Kaiser <just.for.lkml@googlemail.com>
Reviewed-by: Ben Myers <bpm@sgi.com>
Signed-off-by: Ben Myers <bpm@sgi.com>
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Pull GFS2 fix from Steven Whitehouse.
* git://git.kernel.org/pub/scm/linux/kernel/git/steve/gfs2-3.0-fixes:
GFS2: fix skip unlock condition
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git://git.kernel.org/pub/scm/linux/kernel/git/joro/iommu
Pull IOMMU fix from Joerg Roedel:
"One fix for the AMD IOMMU driver to work around broken BIOSes found in
the field. Some BIOSes forget to enable a workaround for a hardware
problem which might cause the IOMMU to stop working under high load
conditions. The fix makes sure this workaround is enabled."
* tag 'iommu-fixes-v3.8-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/joro/iommu:
IOMMU, AMD Family15h Model10-1Fh erratum 746 Workaround
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git://git.kernel.org/pub/scm/linux/kernel/git/sameo/mfd-2.6
Pull MFD fixes from Samuel Ortiz:
"This is the first pull request for MFD fixes for 3.8
We have some build failure fixes (twl4030, vexpress, abx500 and
tps65910), some actual runtime oops and lockup fixes (rtsx, da9052),
and some more hypothetical NULL pointers dereferences fixes for
pcf50633 and max776xx.
Then we also have additional rtsx fixes for a correct switch output
voltage and clock divider correctness for rtl8411 (rtsx driver), and
irqdomain fix for db8550-prcmu, and some more cosmetic fixes for
arizona and wm5102."
* tag 'mfd-for-linus-3.8-1' of git://git.kernel.org/pub/scm/linux/kernel/git/sameo/mfd-2.6:
mfd: rtsx: Fix oops when rtsx_pci_sdmmc is not probed
mfd: wm5102: Fix definition of WM5102_MAX_REGISTER
mfd: twl4030: Don't warn about uninitialized return code
mfd: da9052/53 lockup fix
mfd: rtsx: Add clock divider hook
mmc: rtsx: Call MFD hook to switch output voltage
mfd: rtsx: Add output voltage switch hook
mfd: Fix compile errors and warnings when !CONFIG_AB8500_BM
mfd: vexpress: Export global functions to fix build error
mfd: arizona: Check errors from regcache_sync()
mfd: tc3589x: Use simple irqdomain
mfd: pcf50633: Init pcf->dev before using it
mfd: max77693: Init max77693->dev before using it
mfd: max77686: Init max77686->dev before using it
mfd: db8500-prcmu: Fix irqdomain usage
mfd: tps65910: Select REGMAP_IRQ in Kconfig to fix build error
mfd: arizona: Disable control interface reporting for WM5102 and WM5110
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Pull networking updates from David Miller:
"Much more accumulated than I would have liked due to an unexpected
bout with a nasty flu:
1) AH and ESP input don't set ECN field correctly because the
transport head of the SKB isn't set correctly, fix from Li
RongQing.
2) If netfilter conntrack zones are disabled, we can return an
uninitialized variable instead of the proper error code. Fix from
Borislav Petkov.
3) Fix double SKB free in ath9k driver beacon handling, from Felix
Feitkau.
4) Remove bogus assumption about netns cleanup ordering in
nf_conntrack, from Pablo Neira Ayuso.
5) Remove a bogus BUG_ON in the new TCP fastopen code, from Eric
Dumazet. It uses spin_is_locked() in it's test and is therefore
unsuitable for UP.
6) Fix SELINUX labelling regressions added by the tuntap multiqueue
changes, from Paul Moore.
7) Fix CRC errors with jumbo frame receive in tg3 driver, from Nithin
Nayak Sujir.
8) CXGB4 driver sets interrupt coalescing parameters only on first
queue, rather than all of them. Fix from Thadeu Lima de Souza
Cascardo.
9) Fix regression in the dispatch of read/write registers in dm9601
driver, from Tushar Behera.
10) ipv6_append_data miscalculates header length, from Romain KUNTZ.
11) Fix PMTU handling regressions on ipv4 routes, from Steffen
Klassert, Timo Teräs, and Julian Anastasov.
12) In 3c574_cs driver, add necessary parenthesis to "x << y & z"
expression. From Nickolai Zeldovich.
13) macvlan_get_size() causes underallocation netlink message space,
fix from Eric Dumazet.
14) Avoid division by zero in xfrm_replay_advance_bmp(), from Nickolai
Zeldovich. Amusingly the zero check was already there, we were
just performing it after the modulus :-)
15) Some more splice bug fixes from Eric Dumazet, which fix things
mostly eminating from how we now more aggressively use high-order
pages in SKBs.
16) Fix size calculation bug when freeing hash tables in the IPSEC
xfrm code, from Michal Kubecek.
17) Fix PMTU event propagation into socket cached routes, from Steffen
Klassert.
18) Fix off by one in TX buffer release in netxen driver, from Eric
Dumazet.
19) Fix rediculous memory allocation requirements introduced by the
tuntap multiqueue changes, from Jason Wang.
20) Remove bogus AMD platform workaround in r8169 driver that causes
major problems in normal operation, from Timo Teräs.
21) virtio-net set affinity and select queue don't handle
discontiguous cpu numbers properly, fix from Wanlong Gao.
22) Fix a route refcounting issue in loopback driver, from Eric
Dumazet. There's a similar fix coming that we might add to the
macvlan driver as well.
23) Fix SKB leaks in batman-adv's distributed arp table code, from
Matthias Schiffer.
24) r8169 driver gives descriptor ownership back the hardware before
we're done reading the VLAN tag out of it, fix from Francois
Romieu.
25) Checksums not calculated properly in GRE tunnel driver fix from
Pravin B Shelar.
26) Fix SCTP memory leak on namespace exit."
* git://git.kernel.org/pub/scm/linux/kernel/git/davem/net: (101 commits)
dm9601: support dm9620 variant
SCTP: Free the per-net sysctl table on net exit. v2
net: phy: icplus: fix broken INTR pin settings
net: phy: icplus: Use the RGMII interface mode to configure clock delays
IP_GRE: Fix kernel panic in IP_GRE with GRE csum.
sctp: set association state to established in dupcook_a handler
ip6mr: limit IPv6 MRT_TABLE identifiers
r8169: fix vlan tag read ordering.
net: cdc_ncm: use IAD provided by the USB core
batman-adv: filter ARP packets with invalid MAC addresses in DAT
batman-adv: check for more types of invalid IP addresses in DAT
batman-adv: fix skb leak in batadv_dat_snoop_incoming_arp_reply()
net: loopback: fix a dst refcounting issue
virtio-net: reset virtqueue affinity when doing cpu hotplug
virtio-net: split out clean affinity function
virtio-net: fix the set affinity bug when CPU IDs are not consecutive
can: pch_can: fix invalid error codes
can: ti_hecc: fix invalid error codes
can: c_can: fix invalid error codes
r8169: remove the obsolete and incorrect AMD workaround
...
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Running AIO is pinning inode in memory using file reference. Once AIO
is completed using aio_complete(), file reference is put and inode can
be freed from memory. So we have to be sure that calling aio_complete()
is the last thing we do with the inode.
CC: xfs@oss.sgi.com
CC: Ben Myers <bpm@sgi.com>
CC: stable@vger.kernel.org
Signed-off-by: Jan Kara <jack@suse.cz>
Reviewed-by: Ben Myers <bpm@sgi.com>
Signed-off-by: Ben Myers <bpm@sgi.com>
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When the new inode verify in xfs_iread() fails, the create
transaction is aborted and a shutdown occurs. The subsequent unmount
then hangs in xfs_wait_buftarg() on a buffer that has an elevated
hold count. Debug showed that it was an AGI buffer getting stuck:
[ 22.576147] XFS (vdb): buffer 0x2/0x1, hold 0x2 stuck
[ 22.976213] XFS (vdb): buffer 0x2/0x1, hold 0x2 stuck
[ 23.376206] XFS (vdb): buffer 0x2/0x1, hold 0x2 stuck
[ 23.776325] XFS (vdb): buffer 0x2/0x1, hold 0x2 stuck
The trace of this buffer leading up to the shutdown (trimmed for
brevity) looks like:
xfs_buf_init: bno 0x2 nblks 0x1 hold 1 caller xfs_buf_get_map
xfs_buf_get: bno 0x2 len 0x200 hold 1 caller xfs_buf_read_map
xfs_buf_read: bno 0x2 len 0x200 hold 1 caller xfs_trans_read_buf_map
xfs_buf_iorequest: bno 0x2 nblks 0x1 hold 1 caller _xfs_buf_read
xfs_buf_hold: bno 0x2 nblks 0x1 hold 1 caller xfs_buf_iorequest
xfs_buf_rele: bno 0x2 nblks 0x1 hold 2 caller xfs_buf_iorequest
xfs_buf_iowait: bno 0x2 nblks 0x1 hold 1 caller _xfs_buf_read
xfs_buf_ioerror: bno 0x2 len 0x200 hold 1 caller xfs_buf_bio_end_io
xfs_buf_iodone: bno 0x2 nblks 0x1 hold 1 caller _xfs_buf_ioend
xfs_buf_iowait_done: bno 0x2 nblks 0x1 hold 1 caller _xfs_buf_read
xfs_buf_hold: bno 0x2 nblks 0x1 hold 1 caller xfs_buf_item_init
xfs_trans_read_buf: bno 0x2 len 0x200 hold 2 recur 0 refcount 1
xfs_trans_brelse: bno 0x2 len 0x200 hold 2 recur 0 refcount 1
xfs_buf_item_relse: bno 0x2 nblks 0x1 hold 2 caller xfs_trans_brelse
xfs_buf_rele: bno 0x2 nblks 0x1 hold 2 caller xfs_buf_item_relse
xfs_buf_unlock: bno 0x2 nblks 0x1 hold 1 caller xfs_trans_brelse
xfs_buf_rele: bno 0x2 nblks 0x1 hold 1 caller xfs_trans_brelse
xfs_buf_trylock: bno 0x2 nblks 0x1 hold 2 caller _xfs_buf_find
xfs_buf_find: bno 0x2 len 0x200 hold 2 caller xfs_buf_get_map
xfs_buf_get: bno 0x2 len 0x200 hold 2 caller xfs_buf_read_map
xfs_buf_read: bno 0x2 len 0x200 hold 2 caller xfs_trans_read_buf_map
xfs_buf_hold: bno 0x2 nblks 0x1 hold 2 caller xfs_buf_item_init
xfs_trans_read_buf: bno 0x2 len 0x200 hold 3 recur 0 refcount 1
xfs_trans_log_buf: bno 0x2 len 0x200 hold 3 recur 0 refcount 1
xfs_buf_item_unlock: bno 0x2 len 0x200 hold 3 flags DIRTY liflags ABORTED
xfs_buf_unlock: bno 0x2 nblks 0x1 hold 3 caller xfs_buf_item_unlock
xfs_buf_rele: bno 0x2 nblks 0x1 hold 3 caller xfs_buf_item_unlock
And that is the AGI buffer from cold cache read into memory to
transaction abort. You can see at transaction abort the bli is dirty
and only has a single reference. The item is not pinned, and it's
not in the AIL. Hence the only reference to it is this transaction.
The problem is that the xfs_buf_item_unlock() call is dropping the
last reference to the xfs_buf_log_item attached to the buffer (which
holds a reference to the buffer), but it is not freeing the
xfs_buf_log_item. Hence nothing will ever release the buffer, and
the unmount hangs waiting for this reference to go away.
The fix is simple - xfs_buf_item_unlock needs to detect the last
reference going away in this case and free the xfs_buf_log_item to
release the reference it holds on the buffer.
Signed-off-by: Dave Chinner <dchinner@redhat.com>
Reviewed-by: Ben Myers <bpm@sgi.com>
Signed-off-by: Ben Myers <bpm@sgi.com>
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There is a window on small filesytsems where specualtive
preallocation can be larger than that ENOSPC throttling thresholds,
resulting in specualtive preallocation trying to reserve more space
than there is space available. This causes immediate ENOSPC to be
triggered, prealloc to be turned off and flushing to occur. One the
next write (i.e. next 4k page), we do exactly the same thing, and so
effective drive into synchronous 4k writes by triggering ENOSPC
flushing on every page while in the window between the prealloc size
and the ENOSPC prealloc throttle threshold.
Fix this by checking to see if the prealloc size would consume all
free space, and throttle it appropriately to avoid premature
ENOSPC...
Signed-off-by: Dave Chinner <dchinner@redhat.com>
Reviewed-by: Brian Foster <bfoster@redhat.com>
Signed-off-by: Ben Myers <bpm@sgi.com>
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When _xfs_buf_find is passed an out of range address, it will fail
to find a relevant struct xfs_perag and oops with a null
dereference. This can happen when trying to walk a filesystem with a
metadata inode that has a partially corrupted extent map (i.e. the
block number returned is corrupt, but is otherwise intact) and we
try to read from the corrupted block address.
In this case, just fail the lookup. If it is readahead being issued,
it will simply not be done, but if it is real read that fails we
will get an error being reported. Ideally this case should result
in an EFSCORRUPTED error being reported, but we cannot return an
error through xfs_buf_read() or xfs_buf_get() so this lookup failure
may result in ENOMEM or EIO errors being reported instead.
Signed-off-by: Dave Chinner <dchinner@redhat.com>
Reviewed-by: Brian Foster <bfoster@redhat.com>
Reviewed-by: Ben Myers <bpm@sgi.com>
Signed-off-by: Ben Myers <bpm@sgi.com>
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The stack_switch check currently occurs in __xfs_bmapi_allocate,
which means the stack switch only occurs when xfs_bmapi_allocate()
is called in a loop. Pull the check up before the loop in
xfs_bmapi_write() such that the first iteration of the loop has
consistent behavior.
Signed-off-by: Brian Foster <bfoster@redhat.com>
Reviewed-by: Dave Chinner <dchinner@redhat.com>
Signed-off-by: Ben Myers <bpm@sgi.com>
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9802182 changed the return value from EWRONGFS (aka EINVAL)
to EFSCORRUPTED which doesn't seem to be handled properly by
the root filesystem probe.
Signed-off-by: Eric Sandeen <sandeen@redhat.com>
Tested-by: Sergei Trofimovich <slyfox@gentoo.org>
Reviewed-by: Ben Myers <bpm@sgi.com>
Signed-off-by: Ben Myers <bpm@sgi.com>
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