A collection of fixes for ARM platforms. A little large due to us missing to
do one last week, but there's nothing in particular here that is in itself
large and scary.
Mostly a handful of smaller fixes all over the place. The majority is made
up of fixes for OMAP, but there are a few for others as well. In particular,
there was a decision to rename a binding for the Broadcom pinctrl block that
we need to go in before the final release since we then treat it as ABI.
-----BEGIN PGP SIGNATURE-----
Version: GnuPG v1.4.14 (GNU/Linux)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=YBim
-----END PGP SIGNATURE-----
Merge tag 'fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc
Pull ARM SoC fixes from from Olof Johansson:
"A collection of fixes for ARM platforms. A little large due to us
missing to do one last week, but there's nothing in particular here
that is in itself large and scary.
Mostly a handful of smaller fixes all over the place. The majority is
made up of fixes for OMAP, but there are a few for others as well. In
particular, there was a decision to rename a binding for the Broadcom
pinctrl block that we need to go in before the final release since we
then treat it as ABI"
* tag 'fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc:
ARM: dts: omap3-gta04: Add ti,omap36xx to compatible property to avoid problems with booting
ARM: tegra: add LED options back into tegra_defconfig
ARM: dts: omap3-igep: fix boot fail due wrong compatible match
ARM: OMAP3: Fix pinctrl interrupts for core2
pinctrl: Rename Broadcom Capri pinctrl binding
pinctrl: refer to updated dt binding string.
Update dtsi with new pinctrl compatible string
ARM: OMAP: Kill warning in CPUIDLE code with !CONFIG_SMP
ARM: OMAP2+: Add support for thumb mode on DT booted N900
ARM: OMAP2+: clock: fix clkoutx2 with CLK_SET_RATE_PARENT
ARM: OMAP4: hwmod: Fix SOFTRESET logic for OMAP4
ARM: DRA7: hwmod data: correct the sysc data for spinlock
ARM: OMAP5: PRM: Fix reboot handling
ARM: sunxi: dt: Change the touchscreen compatibles
ARM: sun7i: dt: Fix interrupt trigger types
issues booting 3430 based boards.
-----BEGIN PGP SIGNATURE-----
Version: GnuPG v1.4.15 (GNU/Linux)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=J6Y0
-----END PGP SIGNATURE-----
Merge tag 'omap-for-v3.14/fixes-dt-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/tmlind/linux-omap into fixes
From Tony Lindgren:
Two omap3430 vs 3630 device tree regression fixes for
issues booting 3430 based boards.
* tag 'omap-for-v3.14/fixes-dt-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/tmlind/linux-omap:
ARM: dts: omap3-gta04: Add ti,omap36xx to compatible property to avoid problems with booting
ARM: dts: omap3-igep: fix boot fail due wrong compatible match
Signed-off-by: Olof Johansson <olof@lixom.net>
other bcm mobile bindings.
-----BEGIN PGP SIGNATURE-----
Version: GnuPG v1.4.14 (GNU/Linux)
iQIcBAABAgAGBQJTDB0VAAoJEPYb7NoJr+nLwGkQALuroLtwGGq0/6Jw4dr9n5UO
tclAvSbuvUoqwu58cD3grWhkavFKQqR4fJdWcrmczROD9r6rX48QDFe2jNlRjgj/
yNKkTsd+Ay9I0tPeyx3Buf+tVeQgqsSuG7FJPKgAxMf3HT+tmaWpdIMsjcLOwzdi
ZMTpIw0cLGMdtr8OSHW/nJuaQV3b+DhnjSLC8QIRg3XgJGjNzJxiKu2Flp0w261P
Ubzs/PDv83Xl5d972e6JoYR5gGzMwIskm64LmEbHiigLJsvo71oHW57Q2g9asx7h
stiBzAWF7/Q1xDQ0hTukIOIbX94juR9zSaje66qZ578CFiRAYefginCfyIak9R6R
Jk0X3krsc0bU9hi4maiYEMVXO3R7K7Rv4BcdoXkg38BXNyINfpdUZlb/5ds6o2FJ
AZaBgt+/3dl649YaX+ft9VW+1oeV4Hj89sn2pH56NV/rC+dzmh3EHExyHFPJ+sO+
KKaoXVPf7+TyStrwSxXPSdpUlmGWRWEn9NF1JIGtGNBU+hbiXw7TEOD6DaC8TAN0
kqAC3ba1YwJalR5rr6UC8ZG2dIZMv3BF7efrM+ewcV7w7F5KF/suJmYIGF+hAFfJ
Ki7YRRUMS2bVroFjQ7haFGkcwS4JzQnR0hO4O4rNu9JbgBWs0Zv5idj1G/EFpT7a
hM4ZETYQQb27LVicK/dN
=2dxs
-----END PGP SIGNATURE-----
Merge tag 'bcm-for-3.14-pinctrl-reduced-rename' of git://github.com/broadcom/bcm11351 into fixes
Merge 'bcm pinctrl rename' From Christin Daudt:
Rename pinctrl dt binding to restore consistency with other bcm mobile
bindings.
* tag 'bcm-for-3.14-pinctrl-reduced-rename' of git://github.com/broadcom/bcm11351:
pinctrl: Rename Broadcom Capri pinctrl binding
pinctrl: refer to updated dt binding string.
Update dtsi with new pinctrl compatible string
+ Linux 3.14-rc4
Signed-off-by: Olof Johansson <olof@lixom.net>
interrupt types of some IPs, the other fixes up a compatible that got
introduced during 3.14
-----BEGIN PGP SIGNATURE-----
Version: GnuPG v1.4.14 (GNU/Linux)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=uxIH
-----END PGP SIGNATURE-----
Merge tag 'sunxi-fixes-for-3.14' of https://github.com/mripard/linux into fixes
Allwinner fixes from Maxime Ripard:
Two fixes for device trees additions that got added in 3.14. One fixes the
interrupt types of some IPs, the other fixes up a compatible that got
introduced during 3.14
* tag 'sunxi-fixes-for-3.14' of https://github.com/mripard/linux:
ARM: sunxi: dt: Change the touchscreen compatibles
ARM: sun7i: dt: Fix interrupt trigger types
Signed-off-by: Olof Johansson <olof@lixom.net>
It's an enum, not a #define, you can't use it in asm files.
Introduced in commit 5fa10196bd ("x86: Ignore NMIs that come in during
early boot"), and sadly I didn't compile-test things like I should have
before pushing out.
My weak excuse is that the x86 tree generally doesn't introduce stupid
things like this (and the ARM pull afterwards doesn't cause me to do a
compile-test either, since I don't cross-compile).
Cc: Don Zickus <dzickus@redhat.com>
Cc: H. Peter Anvin <hpa@linux.intel.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Pull ARM fixes from Russell King:
"A number of ARM updates for -rc, covering mostly ARM specific code,
but with one change to modpost.c to allow Thumb section mismatches to
be detected.
ARM changes include reporting when an attempt is made to boot a LPAE
kernel on hardware which does not support LPAE, rather than just being
silent about it.
A number of other minor fixes are included too"
* 'fixes' of git://ftp.arm.linux.org.uk/~rmk/linux-arm:
ARM: 7992/1: boot: compressed: ignore bswapsdi2.S
ARM: 7991/1: sa1100: fix compile problem on Collie
ARM: fix noMMU kallsyms symbol filtering
ARM: 7980/1: kernel: improve error message when LPAE config doesn't match CPU
ARM: 7964/1: Detect section mismatches in thumb relocations
ARM: 7963/1: mm: report both sections from PMD
Pull x86 fixes from Peter Anvin:
"A small collection of minor fixes. The FPU stuff is still pending, I
fear. I haven't heard anything from Suresh so I suspect I'm going to
have to dig into the init specifics myself and fix up the patchset"
* 'x86-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
x86: Ignore NMIs that come in during early boot
x86, trace: Further robustify CR2 handling vs tracing
x86, trace: Fix CR2 corruption when tracing page faults
x86/efi: Quirk out SGI UV
Pull power fixes from Ben Herrenschmidt:
"Here are a couple of powerpc fixes for 3.14.
One is (another!) nasty TM problem, we can crash the kernel by forking
inside a transaction. The other one is a simple fix for an alignment
issue which can hurt in LE mode"
* 'merge' of git://git.kernel.org/pub/scm/linux/kernel/git/benh/powerpc:
powerpc: Align p_dyn, p_rela and p_st symbols
powerpc/tm: Fix crash when forking inside a transaction
Don Zickus reports:
A customer generated an external NMI using their iLO to test kdump
worked. Unfortunately, the machine hung. Disabling the nmi_watchdog
made things work.
I speculated the external NMI fired, caused the machine to panic (as
expected) and the perf NMI from the watchdog came in and was latched.
My guess was this somehow caused the hang.
----
It appears that the latched NMI stays latched until the early page
table generation on 64 bits, which causes exceptions to happen which
end in IRET, which re-enable NMI. Therefore, ignore NMIs that come in
during early execution, until we have proper exception handling.
Reported-and-tested-by: Don Zickus <dzickus@redhat.com>
Link: http://lkml.kernel.org/r/1394221143-29713-1-git-send-email-dzickus@redhat.com
Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
Cc: <stable@vger.kernel.org> # v3.5+, older with some backport effort
Commit 017f161a55 (ARM: 7877/1: use built-in byte swap function) added
bswapsdi2.{o,S} to arch/arm/boot/compressed/Makefile, but didn't update
the .gitignore. Thus after a a build git status shows bswapsdi2.S as a
new file, which is a little annoying.
This patch updates arch/arm/boot/compressed/.gitignore to ignore
bswapsdi2.S, as we already do for ashldi3.S and others.
Signed-off-by: Mark Rutland <mark.rutland@arm.com>
Acked-by: Nicolas Pitre <nico@linaro.org>
Acked-by: Kim Phillips <kim.phillips@freescale.com>
Cc: David Woodhouse <David.Woodhouse@intel.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Due to a problem in the MFD Kconfig it was not possible to
compile the UCB battery driver for the Collie SA1100 system,
in turn making it impossible to compile in the battery driver.
(See patch "mfd: include all drivers in subsystem menu".)
After fixing the MFD Kconfig (separate patch) a compile error
appears in the Collie battery driver due to the <mach/collie.h>
implicitly requiring <mach/hardware.h> through <linux/gpio.h>
via <mach/gpio.h> prior to commit
40ca061b "ARM: 7841/1: sa1100: remove complex GPIO interface".
Fix this up by including the required header into
<mach/collie.h>.
Cc: stable@vger.kernel.org
Cc: Andrea Adami <andrea.adami@gmail.com>
Cc: Dmitry Eremin-Solenikov <dbaryshkov@gmail.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
With noMMU, CONFIG_PAGE_OFFSET was not being set correctly. As there's
no MMU, PAGE_OFFSET should be equal to PHYS_OFFSET in all cases. This
commit makes that explicit.
Since we do this, we don't need to mess around in asm/memory.h with
ifdefs to sort this out, so let's get rid of that, and there's no point
offering the "Memory split" option for noMMU as that's meaningless
there.
Fixes: b9b32bf70f ("ARM: use linker magic for vectors and vector stubs")
Cc: <stable@vger.kernel.org>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
This fixes a subtle issue with cache flush which could potentially cause
random userspace crashes because of stale icache lines.
This error crept in when consolidating the cache flush code
Fixes: bd12976c36 (ARC: cacheflush refactor #3: Unify the {d,i}cache)
Signed-off-by: Vineet Gupta <vgupta@synopsys.com>
Cc: linux-kernel@vger.kernel.org
Cc: stable@vger.kernel.org # 3.13
Cc: arc-linux-dev@synopsys.com
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
- Fix compile dependency on Xen ARM to have MMU.
-----BEGIN PGP SIGNATURE-----
Version: GnuPG v1
iQEcBAABAgAGBQJTF4o9AAoJEFjIrFwIi8fJmXAIAJGwTQaaRtSeVQC3Yd3gxGQL
dfIdH+MdPaLxLDFRuLmD0GG4tEUkPXD0n1MarS+UX5hF3sJQi1DjEPc2EeG0vpFU
KaaHNJ6mD/r6P16Gsx5gwwuJ0y0tJfwX8F6WHODJZE3ryTUMFP3iuWYNYeNpLhn4
fQooIiwxmdN5B9Q7Q0VMfEYgBnWiq6mKdtCrbzeTj0JjLNx91F0/umupCsgcO73z
7MzF9rPkTVWFZB1JHnCSrCtzgJ2eS9bnLHMUiUdm8pzZZxq7zv3TKoqx6uuJQOQw
vnL1OxKLNekbsM5XUthTIzG2J+LdqHKhLQv/TeuR5msBg2LN3En6OiMhFuu9qHY=
=w5ov
-----END PGP SIGNATURE-----
Merge tag 'stable/for-linus-3.14-rc5-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/xen/tip
Pull Xen fix from Konrad Rzeszutek Wilk:
"This has exactly one patch for Xen ARM. It sets the dependency to
compile the kernel with MMU enabled - otherwise - the guest won't work
very well"
* tag 'stable/for-linus-3.14-rc5-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/xen/tip:
ARM: XEN depends on having a MMU
The 64bit relocation code places a few symbols in the text segment.
These symbols are only 4 byte aligned where they need to be 8 byte
aligned. Add an explicit alignment.
Signed-off-by: Anton Blanchard <anton@samba.org>
Cc: stable@vger.kernel.org
Tested-by: Laurent Dufour <ldufour@linux.vnet.ibm.com>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
When we fork/clone we currently don't copy any of the TM state to the new
thread. This results in a TM bad thing (program check) when the new process is
switched in as the kernel does a tmrechkpt with TEXASR FS not set. Also, since
R1 is from userspace, we trigger the bad kernel stack pointer detection. So we
end up with something like this:
Bad kernel stack pointer 0 at c0000000000404fc
cpu 0x2: Vector: 700 (Program Check) at [c00000003ffefd40]
pc: c0000000000404fc: restore_gprs+0xc0/0x148
lr: 0000000000000000
sp: 0
msr: 9000000100201030
current = 0xc000001dd1417c30
paca = 0xc00000000fe00800 softe: 0 irq_happened: 0x01
pid = 0, comm = swapper/2
WARNING: exception is not recoverable, can't continue
The below fixes this by flushing the TM state before we copy the task_struct to
the clone. To do this we go through the tmreclaim patch, which removes the
checkpointed registers from the CPU and transitions the CPU out of TM suspend
mode. Hence we need to call tmrechkpt after to restore the checkpointed state
and the TM mode for the current task.
To make this fail from userspace is simply:
tbegin
li r0, 2
sc
<boom>
Kudos to Adhemerval Zanella Neto for finding this.
Signed-off-by: Michael Neuling <mikey@neuling.org>
cc: Adhemerval Zanella Neto <azanella@br.ibm.com>
cc: stable@vger.kernel.org
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Building on commit 0ac09f9f8c ("x86, trace: Fix CR2 corruption when
tracing page faults") this patch addresses another few issues:
- Now that read_cr2() is lifted into trace_do_page_fault(), we should
pass the address to trace_page_fault_entries() to avoid it
re-reading a potentially changed cr2.
- Put both trace_do_page_fault() and trace_page_fault_entries() under
CONFIG_TRACING.
- Mark both fault entry functions {,trace_}do_page_fault() as notrace
to avoid getting __mcount or other function entry trace callbacks
before we've observed CR2.
- Mark __do_page_fault() as noinline to guarantee the function tracer
does get to see the fault.
Cc: <jolsa@redhat.com>
Cc: <vincent.weaver@maine.edu>
Acked-by: Steven Rostedt <rostedt@goodmis.org>
Signed-off-by: Peter Zijlstra <peterz@infradead.org>
Link: http://lkml.kernel.org/r/20140306145300.GO9987@twins.programming.kicks-ass.net
Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
The trace_do_page_fault function trigger tracepoint
and then handles the actual page fault.
This could lead to error if the tracepoint caused page
fault. The original cr2 value gets lost and the original
page fault handler kills current process with SIGSEGV.
This happens if you record page faults with callchain
data, the user part of it will cause tracepoint handler
to page fault:
# perf record -g -e exceptions:page_fault_user ls
Fixing this by saving the original cr2 value
and using it after tracepoint handler is done.
v2: Moving the cr2 read before exception_enter, because
it could trigger tracepoint as well.
Reported-by: Arnaldo Carvalho de Melo <acme@ghostprotocols.net>
Reported-by: Vince Weaver <vincent.weaver@maine.edu>
Tested-by: Vince Weaver <vincent.weaver@maine.edu>
Acked-by: Steven Rostedt <rostedt@goodmis.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Seiji Aguchi <seiji.aguchi@hds.com>
Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
Link: http://lkml.kernel.org/r/alpine.DEB.2.10.1402211701380.6395@vincent-weaver-1.um.maine.edu
Link: http://lkml.kernel.org/r/20140228160526.GD1133@krava.brq.redhat.com
causes a crash during boot - Borislav Petkov
-----BEGIN PGP SIGNATURE-----
Version: GnuPG v1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=YIab
-----END PGP SIGNATURE-----
Merge tag 'efi-urgent' into x86/urgent
* Disable the new EFI 1:1 virtual mapping for SGI UV because using it
causes a crash during boot - Borislav Petkov
Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
Alex reported hitting the following BUG after the EFI 1:1 virtual
mapping work was merged,
kernel BUG at arch/x86/mm/init_64.c:351!
invalid opcode: 0000 [#1] SMP
Call Trace:
[<ffffffff818aa71d>] init_extra_mapping_uc+0x13/0x15
[<ffffffff818a5e20>] uv_system_init+0x22b/0x124b
[<ffffffff8108b886>] ? clockevents_register_device+0x138/0x13d
[<ffffffff81028dbb>] ? setup_APIC_timer+0xc5/0xc7
[<ffffffff8108b620>] ? clockevent_delta2ns+0xb/0xd
[<ffffffff818a3a92>] ? setup_boot_APIC_clock+0x4a8/0x4b7
[<ffffffff8153d955>] ? printk+0x72/0x74
[<ffffffff818a1757>] native_smp_prepare_cpus+0x389/0x3d6
[<ffffffff818957bc>] kernel_init_freeable+0xb7/0x1fb
[<ffffffff81535530>] ? rest_init+0x74/0x74
[<ffffffff81535539>] kernel_init+0x9/0xff
[<ffffffff81541dfc>] ret_from_fork+0x7c/0xb0
[<ffffffff81535530>] ? rest_init+0x74/0x74
Getting this thing to work with the new mapping scheme would need more
work, so automatically switch to the old memmap layout for SGI UV.
Acked-by: Russ Anderson <rja@sgi.com>
Cc: Alex Thorlton <athorlton@sgi.com
Signed-off-by: Borislav Petkov <bp@suse.de>
Signed-off-by: Matt Fleming <matt.fleming@intel.com>
A patch to linux/irqflags.h uncovered a problem with c6x asm/cache.h
which causes a build failure:
/arch/c6x/include/asm/cache.h:63:20: error: expected ‘=’, ‘,’, ‘;’, ‘asm’ or ‘__attribute__’ before ‘c6x_cache_init’
extern void __init c6x_cache_init(void);
The asm/cache.h was relying on linux/irqflags.h to pull in linux/init.h
but the recent patch changed that. The c6x header should have included
linux/init.h all along.
Signed-off-by: Mark Salter <msalter@redhat.com>
Merge misc fixes from Andrew Morton.
* emailed patches from Andrew Morton akpm@linux-foundation.org>:
mm: page_alloc: exempt GFP_THISNODE allocations from zone fairness
mm: numa: bugfix for LAST_CPUPID_NOT_IN_PAGE_FLAGS
MAINTAINERS: add and correct types of some "T:" entries
MAINTAINERS: use tab for separator
rapidio/tsi721: fix tasklet termination in dma channel release
hfsplus: fix remount issue
zram: avoid null access when fail to alloc meta
sh: prefix sh-specific "CCR" and "CCR2" by "SH_"
ocfs2: fix quota file corruption
drivers/rtc/rtc-s3c.c: fix incorrect way of save/restore of S3C2410_TICNT for TYPE_S3C64XX
kallsyms: fix absolute addresses for kASLR
scripts/gen_initramfs_list.sh: fix flags for initramfs LZ4 compression
mm: include VM_MIXEDMAP flag in the VM_SPECIAL list to avoid m(un)locking
memcg: reparent charges of children before processing parent
memcg: fix endless loop in __mem_cgroup_iter_next()
lib/radix-tree.c: swapoff tmpfs radix_tree: remember to rcu_read_unlock
dma debug: account for cachelines and read-only mappings in overlap tracking
mm: close PageTail race
MAINTAINERS: EDAC: add Mauro and Borislav as interim patch collectors
Commit bcf24e1daa ("mmc: omap_hsmmc: use the generic config for
omap2plus devices"), enabled the build for other platforms for compile
testing.
sh-allmodconfig now fails with:
include/linux/omap-dma.h:171:8: error: expected identifier before numeric constant
make[4]: *** [drivers/mmc/host/omap_hsmmc.o] Error 1
This happens because SuperH #defines "CCR", which is one of the enum
values in include/linux/omap-dma.h. There's a similar issue with "CCR2"
on sh2a.
As "CCR" and "CCR2" are too generic names for global #defines, prefix
them with "SH_" to fix this.
Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
regressions. There is a single framework fix that prevents dereferencing
a NULL pointer when calling clk_get. The range of fixes for clock driver
regressions spans memory leak fixes, touching the wrong registers that
cause things to explode, misconfigured clock rates that result in
non-responsive devices and even some boot failures. The most benign fix
is DT binding doc typo. It is a stable ABI exposed from the kernel that
was introduced in -rc1, so best to fix it now.
-----BEGIN PGP SIGNATURE-----
Version: GnuPG v1.4.14 (GNU/Linux)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=zck4
-----END PGP SIGNATURE-----
Merge tag 'clk-fixes-for-linus' of git://git.linaro.org/people/mike.turquette/linux
Pull clk framework fixes from Mike Turquette:
"Clock framework and driver fixes, all of which fix user-visible
regressions.
There is a single framework fix that prevents dereferencing a NULL
pointer when calling clk_get. The range of fixes for clock driver
regressions spans memory leak fixes, touching the wrong registers that
cause things to explode, misconfigured clock rates that result in
non-responsive devices and even some boot failures. The most benign
fix is DT binding doc typo. It is a stable ABI exposed from the
kernel that was introduced in -rc1, so best to fix it now"
* tag 'clk-fixes-for-linus' of git://git.linaro.org/people/mike.turquette/linux: (25 commits)
clk:at91: Fix memory leak in of_at91_clk_master_setup()
clk: nomadik: fix multiplatform problem
clk: Correct handling of NULL clk in __clk_{get, put}
clk: shmobile: Fix typo in MSTP clock DT bindings
clk: shmobile: rcar-gen2: Fix qspi divisor
clk: shmobile: rcar-gen2: Fix clock parent for all non-PLL clocks
clk: tegra124: remove gr2d and gr3d clocks
clk: tegra: Fix vic03 mux index
clk: shmobile: rcar-gen2: Fix qspi divisor
clk: shmobile: rcar-gen2: Fix clock parent all non-PLL clocks
clk: tegra: use max divider if divider overflows
clk: tegra: cclk_lp has a pllx/2 divider
clk: tegra: fix sdmmc clks on Tegra1x4
clk: tegra: fix host1x clock on Tegra124
clk: tegra: PLLD2 fixes for hdmi
clk: tegra: Fix PLLD mnp table
clk: tegra: Fix PLLP rate table
clk: tegra: Correct clock number for UARTE
clk: tegra: Add missing Tegra20 fuse clks
ARM: keystone: dts: fix clkvcp3 control register address
...
arch/arm/xen/enlighten.c (and maybe others) use MMU-specific functions
like pte_mkspecial which are only available on MMU builds. So let XEN
depend on MMU.
Suggested-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Acked-by: Stefano Stabellini <stefano.stabellini@eu.citrix.com>
Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Pull perf fixes from Ingo Molnar:
"Misc fixes, most of them on the tooling side"
* 'perf-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
perf tools: Fix strict alias issue for find_first_bit
perf tools: fix BFD detection on opensuse
perf: Fix hotplug splat
perf/x86: Fix event scheduling
perf symbols: Destroy unused symsrcs
perf annotate: Check availability of annotate when processing samples
Pull x86 fixes from Peter Anvin:
"The VMCOREINFO patch I'll pushing for this release to avoid having a
release with kASLR and but without that information.
I was hoping to include the FPU patches from Suresh, but ran into a
problem (see other thread); will try to make them happen next week"
* 'x86-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
x86, kaslr: add missed "static" declarations
x86, kaslr: export offset in VMCOREINFO ELF notes
The last time tegra_defconfig was rebuilt, various LEDs options were
somehow selected by other options, and hence their entries in
tegra_defconfig were removed by "make savedefconfig". However, for some
reason this is no longer happening, so we need to add the entries back
into tegra_defconfig so the they are enabled in .config.
Fixes: db079b1811 ("ARM: tegra: rebuild tegra_defconfig to add DEBUG_FS)"
Reported-by: Marc Dietrich <marvin24@gmx.de>
Signed-off-by: Stephen Warren <swarren@nvidia.com>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
virtualization on Intel is broken in 3.13 and fixed by this
pull request.
-----BEGIN PGP SIGNATURE-----
Version: GnuPG v2.0.22 (GNU/Linux)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=zQTn
-----END PGP SIGNATURE-----
Merge tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm
Pull KVM fixes from Paolo Bonzini:
"Three x86 fixes and one for ARM/ARM64.
In particular, nested virtualization on Intel is broken in 3.13 and
fixed by this pull request"
* tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm:
kvm, vmx: Really fix lazy FPU on nested guest
kvm: x86: fix emulator buffer overflow (CVE-2014-0049)
arm/arm64: KVM: detect CPU reset on CPU_PM_EXIT
KVM: MMU: drop read-only large sptes when creating lower level sptes
Pull powerpc fixes from Ben Herrenschmidt:
"Here are a few more powerpc fixes for 3.14.
Most of these are also CC'ed to stable and fix bugs in new
functionality introduced in the last 2 or 3 versions"
* 'merge' of git://git.kernel.org/pub/scm/linux/kernel/git/benh/powerpc:
powerpc/powernv: Fix indirect XSCOM unmangling
powerpc/powernv: Fix opal_xscom_{read,write} prototype
powerpc/powernv: Refactor PHB diag-data dump
powerpc/powernv: Dump PHB diag-data immediately
powerpc: Increase stack redzone for 64-bit userspace to 512 bytes
powerpc/ftrace: bugfix for test_24bit_addr
powerpc/crashdump : Fix page frame number check in copy_oldmem_page
powerpc/le: Ensure that the 'stop-self' RTAS token is handled correctly
This patch is based on commit:
016c12d2 ("ARM: OMAP3: Fix hardware detection for omap3630 when booted with device tree")
and fixes a boot hang due the IGEP board being wrongly initialized
as an OMAP3430 platform instead of an OMAP3630.
Signed-off-by: Javier Martinez Canillas <javier.martinez@collabora.co.uk>
Signed-off-by: Tony Lindgren <tony@atomide.com>
Commit fb4a96029c (arm64: kernel: fix per-cpu offset restore on
resume) uses per_cpu_offset() unconditionally during CPU wakeup,
however, this is only defined for the SMP case.
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
Reported-by: Dave P Martin <Dave.Martin@arm.com>
Page table entries on ARM64 are 64 bits, and some pte functions such as
pte_dirty return a bitwise-and of a flag with the pte value. If the
flag to be tested resides in the upper 32 bits of the pte, then we run
into the danger of the result being dropped if downcast.
For example:
gather_stats(page, md, pte_dirty(*pte), 1);
where pte_dirty(*pte) is downcast to an int.
This patch adds a double logical invert to all the pte_ accessors to
ensure predictable downcasting.
Signed-off-by: Steve Capper <steve.capper@linaro.org>
Cc: <stable@vger.kernel.org>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
and random crashes if booting n900 with device tree and
thumb mode. Also few other regressions and fixes.
-----BEGIN PGP SIGNATURE-----
Version: GnuPG v1.4.15 (GNU/Linux)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=2y5d
-----END PGP SIGNATURE-----
Merge tag 'omap-for-v3.14/fixes-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/tmlind/linux-omap into fixes
Omap fixes from Tony Lindgren:
Fixes for omaps mostly to fix the 3430 display regression,
and random crashes if booting n900 with device tree and
thumb mode. Also few other regressions and fixes.
* tag 'omap-for-v3.14/fixes-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/tmlind/linux-omap:
ARM: OMAP3: Fix pinctrl interrupts for core2
ARM: OMAP: Kill warning in CPUIDLE code with !CONFIG_SMP
ARM: OMAP2+: Add support for thumb mode on DT booted N900
ARM: OMAP2+: clock: fix clkoutx2 with CLK_SET_RATE_PARENT
ARM: OMAP4: hwmod: Fix SOFTRESET logic for OMAP4
ARM: DRA7: hwmod data: correct the sysc data for spinlock
ARM: OMAP5: PRM: Fix reboot handling
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
We need to unmangle the full address, not just the register
number, and we also need to support the real indirect bit
being set for in-kernel uses.
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
CC: <stable@vger.kernel.org> [v3.13]
The OPAL firmware functions opal_xscom_read and opal_xscom_write
take a 64-bit argument for the XSCOM (PCB) address in order to
support the indirect mode on P8.
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
CC: <stable@vger.kernel.org> [v3.13]
As Ben suggested, the patch prints PHB diag-data with multiple
fields in one line and omits the line if the fields of that
line are all zero.
With the patch applied, the PHB3 diag-data dump looks like:
PHB3 PHB#3 Diag-data (Version: 1)
brdgCtl: 00000002
RootSts: 0000000f 00400000 b0830008 00100147 00002000
nFir: 0000000000000000 0030006e00000000 0000000000000000
PhbSts: 0000001c00000000 0000000000000000
Lem: 0000000000100000 42498e327f502eae 0000000000000000
InAErr: 8000000000000000 8000000000000000 0402030000000000 0000000000000000
PE[ 8] A/B: 8480002b00000000 8000000000000000
[ The current diag data is so big that it overflows the printk
buffer pretty quickly in cases when we get a handful of errors
at once which can happen. --BenH
]
Signed-off-by: Gavin Shan <shangw@linux.vnet.ibm.com>
CC: <stable@vger.kernel.org>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
The PHB diag-data is important to help locating the root cause for
EEH errors such as frozen PE or fenced PHB. However, the EEH core
enables IO path by clearing part of HW registers before collecting
this data causing it to be corrupted.
This patch fixes this by dumping the PHB diag-data immediately when
frozen/fenced state on PE or PHB is detected for the first time in
eeh_ops::get_state() or next_error() backend.
Signed-off-by: Gavin Shan <shangw@linux.vnet.ibm.com>
CC: <stable@vger.kernel.org>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
The new ELFv2 little-endian ABI increases the stack redzone -- the
area below the stack pointer that can be used for storing data --
from 288 bytes to 512 bytes. This means that we need to allow more
space on the user stack when delivering a signal to a 64-bit process.
To make the code a bit clearer, we define new USER_REDZONE_SIZE and
KERNEL_REDZONE_SIZE symbols in ptrace.h. For now, we leave the
kernel redzone size at 288 bytes, since increasing it to 512 bytes
would increase the size of interrupt stack frames correspondingly.
Gcc currently only makes use of 288 bytes of redzone even when
compiling for the new little-endian ABI, and the kernel cannot
currently be compiled with the new ABI anyway.
In the future, hopefully gcc will provide an option to control the
amount of redzone used, and then we could reduce it even more.
This also changes the code in arch_compat_alloc_user_space() to
preserve the expanded redzone. It is not clear why this function would
ever be used on a 64-bit process, though.
Signed-off-by: Paul Mackerras <paulus@samba.org>
CC: <stable@vger.kernel.org> [v3.13]
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
The branch target should be the func addr, not the addr of func_descr_t.
So using ppc_function_entry() to generate the right target addr.
Signed-off-by: Liu Ping Fan <pingfank@linux.vnet.ibm.com>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
In copy_oldmem_page, the current check using max_pfn and min_low_pfn to
decide if the page is backed or not, is not valid when the memory layout is
not continuous.
This happens when running as a QEMU/KVM guest, where RTAS is mapped higher
in the memory. In that case max_pfn points to the end of RTAS, and a hole
between the end of the kdump kernel and RTAS is not backed by PTEs. As a
consequence, the kdump kernel is crashing in copy_oldmem_page when accessing
in a direct way the pages in that hole.
This fix relies on the memblock's service memblock_is_region_memory to
check if the read page is part or not of the directly accessible memory.
Signed-off-by: Laurent Dufour <ldufour@linux.vnet.ibm.com>
Tested-by: Mahesh Salgaonkar <mahesh@linux.vnet.ibm.com>
CC: <stable@vger.kernel.org>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Currently we're storing a host endian RTAS token in
rtas_stop_self_args.token. We then pass that directly to rtas. This is
fine on big endian however on little endian the token is not what we
expect.
This will typically result in hitting:
panic("Alas, I survived.\n");
To fix this we always use the stop-self token in host order and always
convert it to be32 before passing this to rtas.
Signed-off-by: Tony Breeds <tony@bakeyournoodle.com>
Cc: stable@vger.kernel.org
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
After splitting padconf core into two parts to avoid exposing
unaccessable registers, the new padconf core2 domain was left
without a wake-up interrupt.
Fix the issue by passing the shared wake-up interrupt in
platform data like we do for padconf core and wkup domains
already.
Fixes: 3d49538364 (ARM: dts: Split omap3 pinmux core device)
Signed-off-by: Tony Lindgren <tony@atomide.com>
Commit e504c9098e (kvm, vmx: Fix lazy FPU on nested guest, 2013-11-13)
highlighted a real problem, but the fix was subtly wrong.
nested_read_cr0 is the CR0 as read by L2, but here we want to look at
the CR0 value reflecting L1's setup. In other words, L2 might think
that TS=0 (so nested_read_cr0 has the bit clear); but if L1 is actually
running it with TS=1, we should inject the fault into L1.
The effective value of CR0 in L2 is contained in vmcs12->guest_cr0, use
it.
Fixes: e504c9098e
Reported-by: Kashyap Chamarty <kchamart@redhat.com>
Reported-by: Stefan Bader <stefan.bader@canonical.com>
Tested-by: Kashyap Chamarty <kchamart@redhat.com>
Tested-by: Anthoine Bourgeois <bourgeois@bertin.fr>
Cc: stable@vger.kernel.org
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
The problem occurs when the guest performs a pusha with the stack
address pointing to an mmio address (or an invalid guest physical
address) to start with, but then extending into an ordinary guest
physical address. When doing repeated emulated pushes
emulator_read_write sets mmio_needed to 1 on the first one. On a
later push when the stack points to regular memory,
mmio_nr_fragments is set to 0, but mmio_is_needed is not set to 0.
As a result, KVM exits to userspace, and then returns to
complete_emulated_mmio. In complete_emulated_mmio
vcpu->mmio_cur_fragment is incremented. The termination condition of
vcpu->mmio_cur_fragment == vcpu->mmio_nr_fragments is never achieved.
The code bounces back and fourth to userspace incrementing
mmio_cur_fragment past it's buffer. If the guest does nothing else it
eventually leads to a a crash on a memcpy from invalid memory address.
However if a guest code can cause the vm to be destroyed in another
vcpu with excellent timing, then kvm_clear_async_pf_completion_queue
can be used by the guest to control the data that's pointed to by the
call to cancel_work_item, which can be used to gain execution.
Fixes: f78146b0f9
Signed-off-by: Andrew Honig <ahonig@google.com>
Cc: stable@vger.kernel.org (3.5+)
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Commit 1fcf7ce0c6 (arm: kvm: implement CPU PM notifier) added
support for CPU power-management, using a cpu_notifier to re-init
KVM on a CPU that entered CPU idle.
The code assumed that a CPU entering idle would actually be powered
off, loosing its state entierely, and would then need to be
reinitialized. It turns out that this is not always the case, and
some HW performs CPU PM without actually killing the core. In this
case, we try to reinitialize KVM while it is still live. It ends up
badly, as reported by Andre Przywara (using a Calxeda Midway):
[ 3.663897] Kernel panic - not syncing: unexpected prefetch abort in Hyp mode at: 0x685760
[ 3.663897] unexpected data abort in Hyp mode at: 0xc067d150
[ 3.663897] unexpected HVC/SVC trap in Hyp mode at: 0xc0901dd0
The trick here is to detect if we've been through a full re-init or
not by looking at HVBAR (VBAR_EL2 on arm64). This involves
implementing the backend for __hyp_get_vectors in the main KVM HYP
code (rather small), and checking the return value against the
default one when the CPU notifier is called on CPU_PM_EXIT.
Reported-by: Andre Przywara <osp@andrep.de>
Tested-by: Andre Przywara <osp@andrep.de>
Cc: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Cc: Rob Herring <rob.herring@linaro.org>
Acked-by: Christoffer Dall <christoffer.dall@linaro.org>
Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Vince "Super Tester" Weaver reported a new round of syscall fuzzing (Trinity) failures,
with perf WARN_ON()s triggering. He also provided traces of the failures.
This is I think the relevant bit:
> pec_1076_warn-2804 [000] d... 147.926153: x86_pmu_disable: x86_pmu_disable
> pec_1076_warn-2804 [000] d... 147.926153: x86_pmu_state: Events: {
> pec_1076_warn-2804 [000] d... 147.926156: x86_pmu_state: 0: state: .R config: ffffffffffffffff ( (null))
> pec_1076_warn-2804 [000] d... 147.926158: x86_pmu_state: 33: state: AR config: 0 (ffff88011ac99800)
> pec_1076_warn-2804 [000] d... 147.926159: x86_pmu_state: }
> pec_1076_warn-2804 [000] d... 147.926160: x86_pmu_state: n_events: 1, n_added: 0, n_txn: 1
> pec_1076_warn-2804 [000] d... 147.926161: x86_pmu_state: Assignment: {
> pec_1076_warn-2804 [000] d... 147.926162: x86_pmu_state: 0->33 tag: 1 config: 0 (ffff88011ac99800)
> pec_1076_warn-2804 [000] d... 147.926163: x86_pmu_state: }
> pec_1076_warn-2804 [000] d... 147.926166: collect_events: Adding event: 1 (ffff880119ec8800)
So we add the insn:p event (fd[23]).
At this point we should have:
n_events = 2, n_added = 1, n_txn = 1
> pec_1076_warn-2804 [000] d... 147.926170: collect_events: Adding event: 0 (ffff8800c9e01800)
> pec_1076_warn-2804 [000] d... 147.926172: collect_events: Adding event: 4 (ffff8800cbab2c00)
We try and add the {BP,cycles,br_insn} group (fd[3], fd[4], fd[15]).
These events are 0:cycles and 4:br_insn, the BP event isn't x86_pmu so
that's not visible.
group_sched_in()
pmu->start_txn() /* nop - BP pmu */
event_sched_in()
event->pmu->add()
So here we should end up with:
0: n_events = 3, n_added = 2, n_txn = 2
4: n_events = 4, n_added = 3, n_txn = 3
But seeing the below state on x86_pmu_enable(), the must have failed,
because the 0 and 4 events aren't there anymore.
Looking at group_sched_in(), since the BP is the leader, its
event_sched_in() must have succeeded, for otherwise we would not have
seen the sibling adds.
But since neither 0 or 4 are in the below state; their event_sched_in()
must have failed; but I don't see why, the complete state: 0,0,1:p,4
fits perfectly fine on a core2.
However, since we try and schedule 4 it means the 0 event must have
succeeded! Therefore the 4 event must have failed, its failure will
have put group_sched_in() into the fail path, which will call:
event_sched_out()
event->pmu->del()
on 0 and the BP event.
Now x86_pmu_del() will reduce n_events; but it will not reduce n_added;
giving what we see below:
n_event = 2, n_added = 2, n_txn = 2
> pec_1076_warn-2804 [000] d... 147.926177: x86_pmu_enable: x86_pmu_enable
> pec_1076_warn-2804 [000] d... 147.926177: x86_pmu_state: Events: {
> pec_1076_warn-2804 [000] d... 147.926179: x86_pmu_state: 0: state: .R config: ffffffffffffffff ( (null))
> pec_1076_warn-2804 [000] d... 147.926181: x86_pmu_state: 33: state: AR config: 0 (ffff88011ac99800)
> pec_1076_warn-2804 [000] d... 147.926182: x86_pmu_state: }
> pec_1076_warn-2804 [000] d... 147.926184: x86_pmu_state: n_events: 2, n_added: 2, n_txn: 2
> pec_1076_warn-2804 [000] d... 147.926184: x86_pmu_state: Assignment: {
> pec_1076_warn-2804 [000] d... 147.926186: x86_pmu_state: 0->33 tag: 1 config: 0 (ffff88011ac99800)
> pec_1076_warn-2804 [000] d... 147.926188: x86_pmu_state: 1->0 tag: 1 config: 1 (ffff880119ec8800)
> pec_1076_warn-2804 [000] d... 147.926188: x86_pmu_state: }
> pec_1076_warn-2804 [000] d... 147.926190: x86_pmu_enable: S0: hwc->idx: 33, hwc->last_cpu: 0, hwc->last_tag: 1 hwc->state: 0
So the problem is that x86_pmu_del(), when called from a
group_sched_in() that fails (for whatever reason), and without x86_pmu
TXN support (because the leader is !x86_pmu), will corrupt the n_added
state.
Reported-and-Tested-by: Vince Weaver <vincent.weaver@maine.edu>
Signed-off-by: Peter Zijlstra <peterz@infradead.org>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Steven Rostedt <rostedt@goodmis.org>
Cc: Stephane Eranian <eranian@google.com>
Cc: Dave Jones <davej@redhat.com>
Cc: <stable@vger.kernel.org>
Link: http://lkml.kernel.org/r/20140221150312.GF3104@twins.programming.kicks-ass.net
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Linus Torvalds