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If the PER-3 facility is installed, the breaking-event address is to be
stored in the low core.
There is no facility bit for PER-3 in stfl(e) and Linux always uses the
value at address 272 no matter if PER-3 is available or not.
We can't hide its existence from the guest. All program interrupts
injected via the SIE automatically store this information if the PER-3
facility is available in the hypervisor. Also the itdb contains the
address automatically.
As there is no switch to turn this mechanism off, let's simply make it
consistent and also store the breaking event address in case of manual
program interrupt injection.
Reviewed-by: Jens Freimann <jfrei@linux.vnet.ibm.com>
Signed-off-by: David Hildenbrand <dahi@linux.vnet.ibm.com>
Reviewed-by: Christian Borntraeger <borntraeger@de.ibm.com>
Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
Acked-by: Cornelia Huck <cornelia.huck@de.ibm.com>
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Previous algorithm had an outer loop with the values {2,3,5,7} and an
inner loop with {2,4,6,8,16,32,...,32768}, and would pick the first
value over the required scaling value (where the total scale was the two
numbers multiplied).
Since the inner loop went up to 32768 it would always pick a value of 2
for PBR and a much higher than necessary value for BR. The desired
scale factor was being divided by two I believe to compensate for the
much higher scale factors (the divide by two not specified in the
reference manual).
Updated to check all values and find the smallest scale factor possible
without going over the desired clock rate.
Signed-off-by: Aaron Brice <aaron.brice@datasoft.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
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user_mode_ignore_vm86() can be used instead of user_mode(), in
places where we have already done a v8086_mode() security
check of ptregs.
But doing this check in the wrong place would be a bug that
could result in security problems, and also the naming still
isn't very clear.
Furthermore, it only affects 32-bit kernels, while most
development happens on 64-bit kernels.
If we replace them with user_mode() checks then the cost is only
a very minor increase in various slowpaths:
text data bss dec hex filename
10573391 703562 1753042 13029995 c6d26b vmlinux.o.before
10573423 703562 1753042 13030027 c6d28b vmlinux.o.after
So lets get rid of this distinction once and for all.
Acked-by: Borislav Petkov <bp@suse.de>
Acked-by: Andy Lutomirski <luto@kernel.org>
Cc: Andrew Lutomirski <luto@kernel.org>
Cc: Andy Lutomirski <luto@amacapital.net>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Brad Spengler <spender@grsecurity.net>
Cc: Denys Vlasenko <dvlasenk@redhat.com>
Cc: H. Peter Anvin <hpa@zytor.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Oleg Nesterov <oleg@redhat.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Link: http://lkml.kernel.org/r/20150329090233.GA1963@gmail.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
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git://git.kernel.org/pub/scm/linux/kernel/git/ras/ras into x86/ras
Pull RAS update from Borislav Petkov:
"This has been long in the making - an AMD-specific MCE-severity grading
function. And it is actually readable at a quick glance. Further error
recovery actions will be based on its output.
Patches tested on every relevant AMD family out there."
Signed-off-by: Ingo Molnar <mingo@kernel.org>
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git://git.kernel.org/pub/scm/linux/kernel/git/mfleming/efi into x86/urgent
Pull EFI fix from Matt Fleming:
- Fix integer overflow issue in the DMI SMBIOS 3.0 code when
calculating the number of DMI table entries. (Jean Delvare)
Signed-off-by: Ingo Molnar <mingo@kernel.org>
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The existing clean-files rule was missing vdsox32.so and
vdsox32.so.dbg. We should really rename the intermediates to
allow a single rule to get them all.
Also-reported-by: Magnus Damm <damm+renesas@opensource.se>
Signed-off-by: Andy Lutomirski <luto@kernel.org>
Link: http://lkml.kernel.org/r/7fa2ad4a63bc6f52e214125900d54165ef06cc10.1427482099.git.luto@kernel.org
Signed-off-by: Ingo Molnar <mingo@kernel.org>
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After 'make clean' the following files were left in arch/x86/vdso/:
vdso-image-32-int80.c
vdso-image-32-syscall.c
vdso-image-32-sysenter.c
These file are generated during the build process and are present
in .gitignore, so remove them.
Signed-off-by: Andrey Skvortsov <andrej.skvortzov@gmail.com>
Signed-off-by: Andy Lutomirski <luto@kernel.org>
Link: http://lkml.kernel.org/r/f85bb7ef6f8c6f6aa4bf422348018c84321454f8.1427482099.git.luto@kernel.org
Signed-off-by: Ingo Molnar <mingo@kernel.org>
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This vDSO code only gets used by 64-bit kernels, not 32-bit ones.
On 64-bit kernels, the data segment is the same for 32-bit and
64-bit userspace, and the SYSRET instruction loads %ss with its
selector.
So there's no need to repeat it by hand. Segment loads are somewhat
expensive: tens of cycles.
Signed-off-by: Denys Vlasenko <dvlasenk@redhat.com>
[ Removed unnecessary comment. ]
Signed-off-by: Andy Lutomirski <luto@kernel.org>
Cc: Alexei Starovoitov <ast@plumgrid.com>
Cc: Andy Lutomirski <luto@amacapital.net>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: H. Peter Anvin <hpa@zytor.com>
Cc: Kees Cook <keescook@chromium.org>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Oleg Nesterov <oleg@redhat.com>
Cc: Steven Rostedt <rostedt@goodmis.org>
Cc: Will Drewry <wad@chromium.org>
Link: http://lkml.kernel.org/r/63da6d778f69fd0f1345d9287f6764d58be519fa.1427482099.git.luto@kernel.org
Signed-off-by: Ingo Molnar <mingo@kernel.org>
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The build-time tool arch/x86/vdso/vdso2c.c includes <linux/elf.h>,
but cannot find it, unless the build host happens to provide it.
It should be reading the uapi linux/elf.h
This build regression came along with the vdso2c changes between
v3.15 and v3.16.
Signed-off-by: Tommi Kyntola <tommi.kyntola@gmail.com>
Signed-off-by: Andy Lutomirski <luto@amacapital.net>
Link: http://lkml.kernel.org/r/1525002.3cJ7BySVpA@musta
Link: http://lkml.kernel.org/r/efe1ec29eda830b1d0030882706f3dac99ce1f73.1427482099.git.luto@kernel.org
Signed-off-by: Ingo Molnar <mingo@kernel.org>
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Let's make it official - I've been doing this for a while now anyway.
Signed-off-by: Borislav Petkov <bp@suse.de>
Cc: Andreas Herrmann <herrmann.der.user@googlemail.com>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Greg KH <gregkh@linuxfoundation.org>
Cc: H. Peter Anvin <hpa@zytor.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Tigran Aivazian <tigran@aivazian.fsnet.co.uk>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
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The ASLR implementation needs to special-case AMD F15h processors by
clearing out bits [14:12] of the virtual address in order to avoid I$
cross invalidations and thus performance penalty for certain workloads.
For details, see:
dfb09f9b7ab0 ("x86, amd: Avoid cache aliasing penalties on AMD family 15h")
This special case reduces the mmapped file's entropy by 3 bits.
The following output is the run on an AMD Opteron 62xx class CPU
processor under x86_64 Linux 4.0.0:
$ for i in `seq 1 10`; do cat /proc/self/maps | grep "r-xp.*libc" ; done
b7588000-b7736000 r-xp 00000000 00:01 4924 /lib/i386-linux-gnu/libc.so.6
b7570000-b771e000 r-xp 00000000 00:01 4924 /lib/i386-linux-gnu/libc.so.6
b75d0000-b777e000 r-xp 00000000 00:01 4924 /lib/i386-linux-gnu/libc.so.6
b75b0000-b775e000 r-xp 00000000 00:01 4924 /lib/i386-linux-gnu/libc.so.6
b7578000-b7726000 r-xp 00000000 00:01 4924 /lib/i386-linux-gnu/libc.so.6
...
Bits [12:14] are always 0, i.e. the address always ends in 0x8000 or
0x0000.
32-bit systems, as in the example above, are especially sensitive
to this issue because 32-bit randomness for VA space is 8 bits (see
mmap_rnd()). With the Bulldozer special case, this diminishes to only 32
different slots of mmap virtual addresses.
This patch randomizes per boot the three affected bits rather than
setting them to zero. Since all the shared pages have the same value
at bits [12..14], there is no cache aliasing problems. This value gets
generated during system boot and it is thus not known to a potential
remote attacker. Therefore, the impact from the Bulldozer workaround
gets diminished and ASLR randomness increased.
More details at:
http://hmarco.org/bugs/AMD-Bulldozer-linux-ASLR-weakness-reducing-mmaped-files-by-eight.html
Original white paper by AMD dealing with the issue:
http://developer.amd.com/wordpress/media/2012/10/SharedL1InstructionCacheonAMD15hCPU.pdf
Mentored-by: Ismael Ripoll <iripoll@disca.upv.es>
Signed-off-by: Hector Marco-Gisbert <hecmargi@upv.es>
Signed-off-by: Borislav Petkov <bp@suse.de>
Acked-by: Kees Cook <keescook@chromium.org>
Cc: Alexander Viro <viro@zeniv.linux.org.uk>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: H. Peter Anvin <hpa@zytor.com>
Cc: Jan-Simon <dl9pf@gmx.de>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: linux-fsdevel@vger.kernel.org
Link: http://lkml.kernel.org/r/1427456301-3764-1-git-send-email-hecmargi@upv.es
Signed-off-by: Ingo Molnar <mingo@kernel.org>
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This file doesn't use any macros from pci_ids.h anymore, drop the include.
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Borislav Petkov <bp@suse.de>
Cc: Andreas Herrmann <herrmann.der.user@googlemail.com>
Cc: H. Peter Anvin <hpa@zytor.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Link: http://lkml.kernel.org/r/1427635734-24786-80-git-send-email-mst@redhat.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
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At exit_intr, we GET_THREAD_INFO(%rcx) and then jump to
retint_kernel if saved CS was from kernel. But the code at
retint_kernel doesn't need %rcx.
Move GET_THREAD_INFO(%rcx) down, after CS check and branch.
While at it, remove "has a correct top of stack" comment.
After recent changes which eliminated FIXUP_TOP_OF_STACK,
we always have a correct pt_regs layout.
Signed-off-by: Denys Vlasenko <dvlasenk@redhat.com>
Cc: Alexei Starovoitov <ast@plumgrid.com>
Cc: Andy Lutomirski <luto@amacapital.net>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: H. Peter Anvin <hpa@zytor.com>
Cc: Kees Cook <keescook@chromium.org>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Oleg Nesterov <oleg@redhat.com>
Cc: Steven Rostedt <rostedt@goodmis.org>
Cc: Will Drewry <wad@chromium.org>
Link: http://lkml.kernel.org/r/1427738975-7391-5-git-send-email-dvlasenk@redhat.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
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The "retint_kernel" code block is misplaced. Since its logical
continuation is "retint_restore_args", it is more natural to
place it above that label. This also makes two jumps "short".
This change only moves code block around, without changing
logic.
This enables the next simplification: making
"retint_restore_args" label a local numeric one.
Signed-off-by: Denys Vlasenko <dvlasenk@redhat.com>
Cc: Alexei Starovoitov <ast@plumgrid.com>
Cc: Andy Lutomirski <luto@amacapital.net>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: H. Peter Anvin <hpa@zytor.com>
Cc: Kees Cook <keescook@chromium.org>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Oleg Nesterov <oleg@redhat.com>
Cc: Steven Rostedt <rostedt@goodmis.org>
Cc: Will Drewry <wad@chromium.org>
Link: http://lkml.kernel.org/r/1427738975-7391-2-git-send-email-dvlasenk@redhat.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
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Fix the use of __raw IO accessor with the readl/writel_relaxed()
versions to allow the code to be used on a system running in big
endian mode.
Signed-off-by: Ben Dooks <ben.dooks@codethink.co.uk>
Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
Acked-by: Nicolas Ferre <nicolas.ferre@atmel.com>
Cc: Andrew Victor <linux@maxim.org.za>
Cc: Jean-Christophe Plagniol-Villard <plagnioj@jcrosoft.com>
Cc: Linux ARM Kernel <linux-arm-kernel@lists.infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: digetx@gmail.com
Cc: hdegoede@redhat.com
Cc: laurent.pinchart+renesas@ideasonboard.com
Cc: maxime.ripard@free-electrons.com
Cc: viresh.kumar@linaro.org
Link: http://lkml.kernel.org/r/1427746633-9137-7-git-send-email-daniel.lezcano@linaro.org
Signed-off-by: Ingo Molnar <mingo@kernel.org>
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sun6i and newer have an arm arch timer which is a better
sched_clock source then the sun4i-timer, and sched_clock does
not have priorities, so do not register the sun4i-timer
sched_clock at all on sun6i and newer.
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
Acked-by: Maxime Ripard <maxime.ripard@free-electrons.com>
Cc: ben.dooks@codethink.co.uk
Cc: digetx@gmail.com
Cc: laurent.pinchart+renesas@ideasonboard.com
Cc: linux-arm-kernel@lists.infradead.org
Cc: viresh.kumar@linaro.org
Link: http://lkml.kernel.org/r/1427746633-9137-8-git-send-email-daniel.lezcano@linaro.org
Signed-off-by: Ingo Molnar <mingo@kernel.org>
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Support big-endian kernel by using endian-aware register access
functions.
Signed-off-by: Dmitry Osipenko <digetx@gmail.com>
Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
Acked-by: Thierry Reding <treding@nvidia.com>
Cc: ben.dooks@codethink.co.uk
Cc: hdegoede@redhat.com
Cc: laurent.pinchart+renesas@ideasonboard.com
Cc: linux-arm-kernel@lists.infradead.org
Cc: maxime.ripard@free-electrons.com
Cc: viresh.kumar@linaro.org
Link: http://lkml.kernel.org/r/1427746633-9137-9-git-send-email-daniel.lezcano@linaro.org
Signed-off-by: Ingo Molnar <mingo@kernel.org>
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The dw_apb_timer_of timer is using __raw_readl() to access the
timer register, which is causing issues when the system is
running in big endian mode. Fix this by using readl_relaxed()
which should account for the endian settings.
This fixes issues where the time jumps around in the dmesg
output due to returnling __le32 values.
For an example, these two console lines show time running
backwards:
[ 49.882572] CPU1: failed to come online
[ 43.282457] Brought up 1 CPUs
Signed-off-by: Ben Dooks <ben.dooks@codethink.co.uk>
Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
Acked-by: Nicolas Ferre <nicolas.ferre@atmel.com>
Cc: Dinh Nguyen <dinguyen@opensource.altera.com>
Cc: Linux ARM Kernel <linux-arm-kernel@lists.infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: digetx@gmail.com
Cc: hdegoede@redhat.com
Cc: laurent.pinchart+renesas@ideasonboard.com
Cc: maxime.ripard@free-electrons.com
Cc: viresh.kumar@linaro.org
Link: http://lkml.kernel.org/r/1427746633-9137-10-git-send-email-daniel.lezcano@linaro.org
Signed-off-by: Ingo Molnar <mingo@kernel.org>
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We have used CLOCK_EVT_MODE_PERIODIC instead of
CLOCK_EVT_FEAT_PERIODIC while defining features. Fix it.
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
Acked-by: Uwe Kleine-Koenig <u.kleine-koenig@pengutronix.de>
Cc: ben.dooks@codethink.co.uk
Cc: digetx@gmail.com
Cc: hdegoede@redhat.com
Cc: laurent.pinchart+renesas@ideasonboard.com
Cc: linux-arm-kernel@lists.infradead.org
Cc: maxime.ripard@free-electrons.com
Link: http://lkml.kernel.org/r/1427746633-9137-11-git-send-email-daniel.lezcano@linaro.org
Signed-off-by: Ingo Molnar <mingo@kernel.org>
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Signed-off-by: Ingo Molnar <mingo@kernel.org>
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We have peculiar problems with multi-path and enclosures: physically, we know
each bay can only be occupied by a single disk device. However in multi-path,
it appears we have many (because each path to the device appears in Linux as a
different kernel device). We try to fix this by only having the last seen
device show up in the bay.
Sysfs gets very annoyed if we try to manipulate links when the kobject sysfs
directory (kobj.sd) doesn't exist and drops a huge WARN_ON which most users
panic and report an oops for. This happens on a few path removal situations
and IBM reports seeing it when one of their multi-path adapters is removed.
Add a check to enclosure device removal for the existence the sysfs directory
containing both the forward and back links so that the remnants (if any) get
removed in either direction but no scary warnings are dumped.
Reported-by: Wen Xiong <wenxiong@linux.vnet.ibm.com>
Tested-by: Wen Xiong <wenxiong@linux.vnet.ibm.com>
Signed-off-by: James Bottomley <JBottomley@Parallels.com>
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Pull file locking fix from Jeff Layton:
"Another small fix for the lease overhaul"
* tag 'locks-v4.0-5' of git://git.samba.org/jlayton/linux:
locks: fix file_lock deletion inside loop
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Turns out sending out layouts to any client is a bad idea if they
can't get at the storage device, so require explicit admin action
to enable pNFS.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: J. Bruce Fields <bfields@redhat.com>
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Kernel version for new ABI in 4.0 has been documented
as 3.20, since the changes have been merged before the kernel
version number change.
Change kernel version from 3.20 to 4.0.
Signed-off-by: Irina Tirdea <irina.tirdea@intel.com>
Signed-off-by: Jonathan Cameron <jic23@kernel.org>
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git://git.kernel.org/pub/scm/linux/kernel/git/tj/libata
Pull libata fixes from Tejun Heo:
"Nothing exciting. Two patches to update queued trim blacklist"
* 'for-4.0-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/libata:
libata: Blacklist queued TRIM on Samsung SSD 850 Pro
libata: Update Crucial/Micron blacklist
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The vd->node is removed from the lists when the transfer started so the
vchan_get_all_descriptors() will not find it. This results memory leak.
Signed-off-by: Peter Ujfalusi <peter.ujfalusi@ti.com>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
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The vd->node is removed from the lists when the transfer started so the
vchan_get_all_descriptors() will not find it. This results memory leak.
Signed-off-by: Peter Ujfalusi <peter.ujfalusi@ti.com>
Acked-by: Stephen Warren <swarren@wwwdotorg.org>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
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In omap_dma_start_desc the vdesc->node is removed from the virt-dma
framework managed lists (to be precise from the desc_issued list).
If a terminate_all comes before the transfer finishes the omap_desc will
not be freed up because it is not in any of the lists and we stopped the
DMA channel so the transfer will not going to complete.
There is no special sequence for leaking memory when using cyclic (audio)
transfer: with every start and stop of a cyclic transfer the driver leaks
struct omap_desc worth of memory.
Free up the allocated memory directly in omap_dma_terminate_all() since the
framework will not going to do that for us.
Signed-off-by: Peter Ujfalusi <peter.ujfalusi@ti.com>
CC: <stable@vger.kernel.org>
CC: <linux-omap@vger.kernel.org>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
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If edma_terminate_all() was called while a transfer was running (i.e. after
edma_execute() but before edma_callback()) the echan->edesc was not freed.
This was due to the fact that a running transfer is on none of the
vchan lists: desc_submitted, desc_issued, desc_completed (edma_execute()
removes it from the desc_issued list), so the vchan_dma_desc_free_list()
called at the end of edma_terminate_all() didn't find it and didn't free it.
This bug was found on an AM1808 based hardware (very similar to da850evm,
however using the second MMC/SD controller), where intense operations on the SD
card wasted the device 128MB RAM within a couple of days.
Peter Ujfalusi:
The issue is even more severe since it affects cyclic (audio) transfers as
well. In this case starting/stopping audio will results memory leak.
Signed-off-by: Petr Kulhavy <petr@barix.com>
Signed-off-by: Peter Ujfalusi <peter.ujfalusi@ti.com>
CC: <stable@vger.kernel.org>
CC: <linux-omap@vger.kernel.org>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
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Setup the capabilities of the device/driver, so that users of the DMAengine API
can query them.
Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
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We shuffled some code around in 8b3444852a2b ('sata_dwc_460ex: move to
generic DMA driver') an accidentally deleted a tab character here. It
causes a Smatch warning "if statement not indented".
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
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git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-gpio
Pull late GPIO fixes from Linus Walleij:
"Here are the (hopefully) last GPIO fixes for v4.0. Nothing
controversial whatsoever, just fixes:
- syscon GPIO fix for Keystone DSP GPIOs
- pin number translation fix for ACPI GPIO
- a smallish compiler warning fix on the mpc8xxx driver"
* tag 'gpio-v4.0-3' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-gpio:
gpio: syscon: reduce message level when direction reg offset not in dt
gpiolib: translate pin number in GPIO ACPI callbacks
gpio: mpc8xxx: remove __initdata annotation for mpc8xxx_gpio_ids[]
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As the infrastructure for eventfd has now been merged, report the
ioeventfd capability as being supported.
Signed-off-by: Nikolay Nikolaev <n.nikolaev@virtualopensystems.com>
[maz: grouped the case entry with the others, fixed commit log]
Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
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Currently we have struct kvm_exit_mmio for encapsulating MMIO abort
data to be passed on from syndrome decoding all the way down to the
VGIC register handlers. Now as we switch the MMIO handling to be
routed through the KVM MMIO bus, it does not make sense anymore to
use that structure already from the beginning. So we keep the data in
local variables until we put them into the kvm_io_bus framework.
Then we fill kvm_exit_mmio in the VGIC only, making it a VGIC private
structure. On that way we replace the data buffer in that structure
with a pointer pointing to a single location in a local variable, so
we get rid of some copying on the way.
With all of the virtual GIC emulation code now being registered with
the kvm_io_bus, we can remove all of the old MMIO handling code and
its dispatching functionality.
I didn't bother to rename kvm_exit_mmio (to vgic_mmio or something),
because that touches a lot of code lines without any good reason.
This is based on an original patch by Nikolay.
Signed-off-by: Andre Przywara <andre.przywara@arm.com>
Cc: Nikolay Nikolaev <n.nikolaev@virtualopensystems.com>
Reviewed-by: Marc Zyngier <marc.zyngier@arm.com>
Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
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Using the framework provided by the recent vgic.c changes, we
register a kvm_io_bus device on mapping the virtual GICv3 resources.
The distributor mapping is pretty straight forward, but the
redistributors need some more love, since they need to be tagged with
the respective redistributor (read: VCPU) they are connected with.
We use the kvm_io_bus framework to register one devices per VCPU.
Signed-off-by: Andre Przywara <andre.przywara@arm.com>
Reviewed-by: Marc Zyngier <marc.zyngier@arm.com>
Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
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Currently we handle the redistributor registers in two separate MMIO
regions, one for the overall behaviour and SPIs and one for the
SGIs/PPIs. That latter forces the creation of _two_ KVM I/O bus
devices for each redistributor.
Since the spec mandates those two pages to be contigious, we could as
well merge them and save the churn with the second KVM I/O bus device.
Signed-off-by: Andre Przywara <andre.przywara@arm.com>
Reviewed-by: Marc Zyngier <marc.zyngier@arm.com>
Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
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Detection if a pwm channel is supported was wrong on removal,
causing the code to try removing non-existing sysfs attributes.
That didn't matter much because sysfs attribute removal of non-existing
files fails silently, and because the wrong evaluation always returned
false, but should nevertheless be fixed.
Reviewed-by: Jean Delvare <jdelvare@suse.de>
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
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Since
commit 17cabf571e50677d980e9ab2a43c5f11213003ae
Author: Chris Wilson <chris@chris-wilson.co.uk>
Date: Wed Jan 14 11:20:57 2015 +0000
drm/i915: Trim the command parser allocations
we may then try to allocate a zero-sized object and attempt to extract
its pages. Understandably this fails.
Note that the real offender seems to be
commit b9ffd80ed659c559152c042e74741f4f60cac691
Author: Brad Volkin <bradley.d.volkin@intel.com>
Date: Thu Dec 11 12:13:10 2014 -0800
drm/i915: Use batch length instead of object size in command parser
Testcase: igt/gem_exec_nop #ivb,byt,hsw
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
[cherry picked from commit 743e78c1d726d875b98ff9689cc77c4d3d5d9ae2
from drm-intel-next because 4.0 seems to be affected by this too,
despite that the obvious culprit is definitely not in 4.0. Whatever,
if fixes a bug.
Signed-off-by: Daniel Vetter <daniel.vetter@intel.com>
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A trivial code cleanup. This `if` is redundant.
Signed-off-by: Eugene Korenevsky <ekorenevsky@gmail.com>
Message-Id: <20150328222717.GA6508@gnote>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
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Some constants are redfined in emulate.c. Avoid it.
s/SELECTOR_RPL_MASK/SEGMENT_RPL_MASK
s/SELECTOR_TI_MASK/SEGMENT_TI_MASK
No functional change.
Signed-off-by: Nadav Amit <namit@cs.technion.ac.il>
Message-Id: <1427635984-8113-3-git-send-email-namit@cs.technion.ac.il>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
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The eflags are redefined (using other defines) in emulate.c.
Use the definition from processor-flags.h as some mess already started.
No functional change.
Signed-off-by: Nadav Amit <namit@cs.technion.ac.il>
Message-Id: <1427635984-8113-2-git-send-email-namit@cs.technion.ac.il>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
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If the source of BSF and BSR is zero, the destination register should not
change. That is how real hardware behaves. If we set the destination even with
the same value that we had before, we may clear bits [63:32] unnecassarily.
Signed-off-by: Nadav Amit <namit@cs.technion.ac.il>
Message-Id: <1427719163-5429-4-git-send-email-namit@cs.technion.ac.il>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
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POPA should assign the values to the registers as usual registers are assigned.
In other words, 32-bits register assignments should clear bits [63:32] of the
register.
Split the code of register assignments that will be used by future changes as
well.
Signed-off-by: Nadav Amit <namit@cs.technion.ac.il>
Message-Id: <1427719163-5429-3-git-send-email-namit@cs.technion.ac.il>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
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On legacy mode CMOV emulation should still clear bits [63:32] even if the
assignment is not done. The previous fix 140bad89fd ("KVM: x86: emulation of
dword cmov on long-mode should clear [63:32]") was incomplete.
Signed-off-by: Nadav Amit <namit@cs.technion.ac.il>
Message-Id: <1427719163-5429-2-git-send-email-namit@cs.technion.ac.il>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
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If data is read from PIC with invalid access size, the return data stays
uninitialized even though success is returned.
Fix this by always initializing the data.
Signed-off-by: Petr Matousek <pmatouse@redhat.com>
Reported-by: Nadav Amit <nadav.amit@gmail.com>
Message-Id: <20150311111609.GG8544@dhcp-25-225.brq.redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
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git://git.kernel.org/pub/scm/linux/kernel/git/jhogan/kvm-mips into kvm-next
MIPS KVM Guest FPU & SIMD (MSA) Support
Add guest FPU and MIPS SIMD Architecture (MSA) support to MIPS KVM, by
enabling the host FPU/MSA while in guest mode. This adds two new KVM
capabilities, KVM_CAP_MIPS_FPU & KVM_CAP_MIPS_MSA, and supports the 3 FP
register modes (FR=0, FR=1, FRE=1), and 128-bit MSA vector registers,
with lazy FPU/MSA context save and restore.
Some required MIPS FP/MSA fixes are merged in from a branch in the MIPS
tree first.
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Reported-by: David Binderman <dcb314@hotmail.com>
Signed-off-by: Finn Thain <fthain@telegraphics.com.au>
Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
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https://git.kernel.org/pub/scm/linux/kernel/git/iwlwifi/iwlwifi-fixes
* fix a memory leak: we leaked memory each time the module
was loaded.
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In order to transmit and receive data when have 32 bytes of data that
ready has prepared on Transmit/Receive Buffer to transmit or receive.
Instead transmits/receives a byte data using Transmit/Receive Buffer
Data Triggering Number will improve the speed of transfer data.
Signed-off-by: Hiep Cao Minh <cm-hiep@jinso.co.jp>
Signed-off-by: Mark Brown <broonie@kernel.org>
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The max77693 regulator driver no longer supports board files. Remove the
left-overs. Additionally fix name of device in comment.
Signed-off-by: Krzysztof Kozlowski <k.kozlowski@samsung.com>
Acked-by: Lee Jones <lee.jones@linaro.org>
Signed-off-by: Mark Brown <broonie@kernel.org>
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