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git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull x86 fixes from Ingo Molnar:
"A build fix and a reboot quirk"
* 'x86-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
x86/reboot: Add reboot quirk for Dell Latitude E5410
x86, build, pci: Fix PCI_MSI build on !SMP
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Dell Latitude E5410 needs reboot=pci to actually reboot.
Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: http://lkml.kernel.org/r/1380888964-14517-1-git-send-email-ville.syrjala@linux.intel.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
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Commit ebd97be635 ('PCI: remove ARCH_SUPPORTS_MSI kconfig option')
removed the ARCH_SUPPORTS_MSI option which architectures could select
to indicate that they support MSI. Now, all architectures are supposed
to build fine when MSI support is enabled: instead of having the
architecture tell *when* MSI support can be used, it's up to the
architecture code to ensure that MSI support can be enabled.
On x86, commit ebd97be635 removed the following line:
select ARCH_SUPPORTS_MSI if (X86_LOCAL_APIC && X86_IO_APIC)
Which meant that MSI support was only available when the local APIC
and I/O APIC were enabled. While this is always true on SMP or x86-64,
it is not necessarily the case on i386 !SMP.
The below patch makes sure that the local APIC and I/O APIC support is
always enabled when MSI support is enabled. To do so, it:
* Ensures the X86_UP_APIC option is not visible when PCI_MSI is
enabled. This is the option that allows, on UP machines, to enable
or not the APIC support. It is already not visible on SMP systems,
or x86-64 systems, for example. We're simply also making it
invisible on i386 MSI systems.
* Ensures that the X86_LOCAL_APIC and X86_IO_APIC options are 'y'
when PCI_MSI is enabled.
Notice that this change requires a change in drivers/iommu/Kconfig to
avoid a recursive Kconfig dependencey. The AMD_IOMMU option selects
PCI_MSI, but was depending on X86_IO_APIC. This dependency is no
longer needed: as soon as PCI_MSI is selected, the presence of
X86_IO_APIC is guaranteed. Moreover, the AMD_IOMMU already depended on
X86_64, which already guaranteed that X86_IO_APIC was enabled, so this
dependency was anyway redundant.
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Link: http://lkml.kernel.org/r/1380794354-9079-1-git-send-email-thomas.petazzoni@free-electrons.com
Reported-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Acked-by: Bjorn Helgaas <bhelgaas@google.com>
Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
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git://git.kernel.org/pub/scm/linux/kernel/git/vgupta/arc
Pull ARC fix from Vineet Gupta:
"Fix for broken gdb 'jump'"
* tag 'arc-fixes-for-3.12-part3' of git://git.kernel.org/pub/scm/linux/kernel/git/vgupta/arc:
ARC: Ignore ptrace SETREGSET request for synthetic register "stop_pc"
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ARCompact TRAP_S insn used for breakpoints, commits before exception is
taken (updating architectural PC). So ptregs->ret contains next-PC and
not the breakpoint PC itself. This is different from other restartable
exceptions such as TLB Miss where ptregs->ret has exact faulting PC.
gdb needs to know exact-PC hence ARC ptrace GETREGSET provides for
@stop_pc which returns ptregs->ret vs. EFA depending on the
situation.
However, writing stop_pc (SETREGSET request), which updates ptregs->ret
doesn't makes sense stop_pc doesn't always correspond to that reg as
described above.
This was not an issue so far since user_regs->ret / user_regs->stop_pc
had same value and both writing to ptregs->ret was OK, needless, but NOT
broken, hence not observed.
With gdb "jump", they diverge, and user_regs->ret updating ptregs is
overwritten immediately with stop_pc, which this patch fixes.
Reported-by: Anton Kolesov <akolesov@synopsys.com>
Signed-off-by: Vineet Gupta <vgupta@synopsys.com>
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Pull MIPS fix from Ralf Baechle:
"Just one fix. The stack protector was loading the value of the canary
instead of its address"
* 'upstream' of git://git.linux-mips.org/pub/scm/ralf/upstream-linus:
MIPS: stack protector: Fix per-task canary switch
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Commit 1400eb6 (MIPS: r4k,octeon,r2300: stack protector: change canary
per task) was merged in v3.11 and introduced assembly in the MIPS resume
functions to update the value of the current canary in
__stack_chk_guard. However it used PTR_L resulting in a load of the
canary value, instead of PTR_LA to construct its address. The value is
intended to be random but is then treated as an address in the
subsequent LONG_S (store).
This was observed to cause a fault and panic:
CPU 0 Unable to handle kernel paging request at virtual address 139fea20, epc == 8000cc0c, ra == 8034f2a4
Oops[#1]:
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$24 : 139fea20 1e1f7cb6
...
Call Trace:
[<8000cc0c>] resume+0xac/0x118
[<8034f2a4>] __schedule+0x5f8/0x78c
[<8034f4e0>] schedule_preempt_disabled+0x20/0x2c
[<80348eec>] rest_init+0x74/0x84
[<804dc990>] start_kernel+0x43c/0x454
Code: 3c18804b 8f184030 8cb901f8 <af190000> 00c0e021 8cb002f0 8cb102f4 8cb202f8 8cb302fc
This can also be forced by modifying
arch/mips/include/asm/stackprotector.h so that the default
__stack_chk_guard value is more likely to be a bad (or unaligned)
pointer.
Fix it to use PTR_LA instead, to load the address of the canary value,
which the LONG_S can then use to write into it.
Reported-by: bobjones (via #mipslinux on IRC)
Signed-off-by: James Hogan <james.hogan@imgtec.com>
Cc: Ralf Baechle <ralf@linux-mips.org>
Cc: Gregory Fong <gregory.0xf0@gmail.com>
Cc: linux-mips@linux-mips.org
Cc: stable@vger.kernel.org
Patchwork: https://patchwork.linux-mips.org/patch/6026/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
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Pull drm fixes from Dave Airlie:
"All over the map..
- nouveau:
disable MSI, needs more work, will try again next merge window
- radeon:
audio + uvd regression fixes, dpm fixes, reset fixes
- i915:
the dpms fix might fix your haswell
And one pain in the ass revert, so we have VGA arbitration that when
implemented 4-5 years ago really hoped that GPUs could remove
themselves from arbitration completely once they had a kernel driver.
It seems Intel hw designers decided that was too nice a facility to
allow us to have so they removed it when they went on-die (so since
Ironlake at least). Now Alex Williamson added support for VGA
arbitration for newer GPUs however this now exposes itself to
userspace as requireing arbitration of GPU VGA regions and the X
server gets involved and disables things that it can't handle when VGA
access is possibly required around every operation.
So in order to not break userspace we just reverted things back to the
old known broken status so maybe we can try and design out way out.
Ville also had a patch to use stop machine for the two times Intel
needs to access VGA space, that might be acceptable with some rework,
but for now myself and Daniel agreed to just go back"
* 'drm-fixes' of git://people.freedesktop.org/~airlied/linux: (23 commits)
Revert "i915: Update VGA arbiter support for newer devices"
Revert "drm/i915: Delay disabling of VGA memory until vgacon->fbcon handoff is done"
drm/radeon: re-enable sw ACR support on pre-DCE4
drm/radeon/dpm: disable bapm on TN asics
drm/radeon: improve soft reset on CIK
drm/radeon: improve soft reset on SI
drm/radeon/dpm: off by one in si_set_mc_special_registers()
drm/radeon/dpm/btc: off by one in btc_set_mc_special_registers()
drm/radeon: forever loop on error in radeon_do_test_moves()
drm/radeon: fix hw contexts for SUMO2 asics
drm/radeon: fix typo in CP DMA register headers
drm/radeon/dpm: disable multiple UVD states
drm/radeon: use hw generated CTS/N values for audio
drm/radeon: fix N/CTS clock matching for audio
drm/radeon: use 64-bit math to calculate CTS values for audio (v2)
drm/edid: catch kmalloc failure in drm_edid_to_speaker_allocation
Revert "drm/fb-helper: don't sleep for screen unblank when an oops is in progress"
drm/gma500: fix things after get/put page helpers
drm/nouveau/mc: disable msi support by default, it's busted in tons of places
drm/i915: Only apply DPMS to the encoder if enabled
...
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This reverts commit 81b5c7bc8de3e6f63419139c2fc91bf81dea8a7d.
Adding drm/i915 into the vga arbiter chain means that X (in a piece of
well-meant paranoia) will do a get/put on the vga decoding around
_every_ accel call down into the ddx. Which results in some nice
performance disasters [1]. This really breaks userspace, by disabling
DRI for everyone, and stops OpenGL from working, this isn't limited
to just the i915 but both the integrated and discrete GPUs on
multi-gpu systems, in other words this causes untold worlds of pain,
Ville tried to come up with a Great Hack to fiddle the required VGA
I/O ops behind everyone's back using stop_machine, but that didn't
really work out [2]. Given that we're fairly late in the -rc stage for
such games let's just revert this all.
One thing we might want to keep is to delay the disabling of the vga
decoding until the fbdev emulation and the fbcon screen is set up. If
we kill vga mem decoding beforehand fbcon can end up with a white
square in the top-left corner it tried to save from the vga memory for
a seamless transition. And we have bug reports on older platforms
which seem to match these symptoms.
But again that's something to play around with in -next.
References: [1] http://lists.x.org/archives/xorg-devel/2013-September/037763.html
References: [2] http://www.spinics.net/lists/intel-gfx/msg34062.html
Cc: Alex Williamson <alex.williamson@redhat.com>
Cc: Ville Syrjälä <ville.syrjala@linux.intel.com>
Cc: Chris Wilson <chris@chris-wilson.co.uk>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Signed-off-by: Dave Airlie <airlied@redhat.com>
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is done"
This reverts commit 6e1b4fdad5157bb9e88777d525704aba24389bee.
This is part of a revert due to a userspace breakage, better explained in the revert of 1a1a4cbf4906a13c0c377f708df5d94168e7b582.
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Signed-off-by: Dave Airlie <airlied@redhat.com>
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into drm-fixes
Regression fixes for audio and UVD, several hang fixes,
some DPM fixes.
* 'drm-fixes-3.12' of git://people.freedesktop.org/~agd5f/linux:
drm/radeon: re-enable sw ACR support on pre-DCE4
drm/radeon/dpm: disable bapm on TN asics
drm/radeon: improve soft reset on CIK
drm/radeon: improve soft reset on SI
drm/radeon/dpm: off by one in si_set_mc_special_registers()
drm/radeon/dpm/btc: off by one in btc_set_mc_special_registers()
drm/radeon: forever loop on error in radeon_do_test_moves()
drm/radeon: fix hw contexts for SUMO2 asics
drm/radeon: fix typo in CP DMA register headers
drm/radeon/dpm: disable multiple UVD states
drm/radeon: use hw generated CTS/N values for audio
drm/radeon: fix N/CTS clock matching for audio
drm/radeon: use 64-bit math to calculate CTS values for audio (v2)
drm/edid: catch kmalloc failure in drm_edid_to_speaker_allocation
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HW ACR support may have issues on some older chips, so
use SW ACR for now until we've tested further.
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
CC: Rafał Miłecki <zajec5@gmail.com>
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Causes hangs on certain boards.
Fixes:
https://bugs.freedesktop.org/show_bug.cgi?id=70053
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
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Disable CG/PG before resetting.
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
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Disable CG/PG and stop the rlc before resetting.
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Cc: stable@vger.kernel.org
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These checks should be ">=" instead of ">". j is used as an offset into
the table->mc_reg_address[] array and that has
SMC_SISLANDS_MC_REGISTER_ARRAY_SIZE (16) elements.
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Cc: stable@vger.kernel.org
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It should be ">=" instead of ">" here. The table->mc_reg_address[]
array has SMC_EVERGREEN_MC_REGISTER_ARRAY_SIZE (16) elements.
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Cc: stable@vger.kernel.org
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The error path does this:
for (--i; i >= 0; --i) {
which is a forever loop because "i" is unsigned.
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Cc: stable@vger.kernel.org
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They have 4 rather than 8.
Fixes:
https://bugs.freedesktop.org/show_bug.cgi?id=63599
Signed-off-by: wojciech kapuscinski <wojtask9@wp.pl>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Cc: stable@vger.kernel.org
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Wrong bit offset for SRC endian swapping.
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Cc: stable@vger.kernel.org
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Always use the regular UVD state for now. This fixes
a performance regression with UVD playback on certain APUs.
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
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Use the hw generated values rather than calculating
them in the driver. There may be some older r6xx
asics where this doesn't work correctly. This remains
to be seen.
See bug:
https://bugs.freedesktop.org/show_bug.cgi?id=69675
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
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The drm code that calculates the 1001 clocks rounds up
rather than truncating. This allows the table to match
properly on those modes.
See bug:
https://bugs.freedesktop.org/show_bug.cgi?id=69675
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
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Avoid losing precision. See bug:
https://bugs.freedesktop.org/show_bug.cgi?id=69675
v2: fix math as per Anssi's comments.
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
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Return -ENOMEM if the allocation fails.
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Reviewed-by: Jani Nikula <jani.nikula@intel.com>
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progress"
This reverts commit 928c2f0c006bf7f381f58af2b2786d2a858ae311.
This patch double applied, two checks for the price of one.
Signed-off-by: Dave Airlie <airlied@redhat.com>
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Disable MSIs for now until we can fix them up
* nouveau/drm-nouveau-next:
drm/nouveau/mc: disable msi support by default, it's busted in tons of places
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Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
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Commit 8b9ba7a3 'drm/gma500: use gem get/put page helpers' was missing a
line, which resulted in garbled screen.
Signed-off-by: Rob Clark <robdclark@gmail.com>
Tested-by: Guillaume CLÉMENT <gclement@baobob.org>
Signed-off-by: Dave Airlie <airlied@redhat.com>
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git://people.freedesktop.org/~danvet/drm-intel into drm-fixes
Daniel writes:
Just a few important fixes, all cc: stable (I've checked this time around
and made sure they're really there ...). The dpms one is a regression from
the modeset rework and has a good chance to rectify Linus' hdmi issues.
* tag 'drm-intel-fixes-2013-10-07' of git://people.freedesktop.org/~danvet/drm-intel:
drm/i915: Only apply DPMS to the encoder if enabled
drm/i915: Mask LPSP to get PSR working even with Power Well in use by audio.
drm/i915/hsw: Disable L3 caching of atomic memory operations.
drm/i915: fix rps.vlv_work initialization
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The current test for an attached enabled encoder fails if we have
multiple connectors aliased to the same encoder - both connectors
believe they own the enabled encoder and so we attempt to both enable
and disable DPMS on the encoder, leading to hilarity and an OOPs:
[ 354.803064] WARNING: CPU: 0 PID: 482 at
/usr/src/linux/dist/3.11.2/drivers/gpu/drm/i915/intel_display.c:3869 intel_modeset_check_state+0x764/0x770 [i915]()
[ 354.803064] wrong connector dpms state
[ 354.803084] Modules linked in: nfsd auth_rpcgss oid_registry exportfs nfs lockd sunrpc xt_nat iptable_nat nf_nat_ipv4 nf_nat xt_limit xt_LOG xt_tcpudp nf_conntrack_ipv4 nf_defrag_ipv4 ipt_REJECT ipv6 xt_recent xt_conntrack nf_conntrack iptable_filter ip_tables x_tables snd_hda_codec_realtek snd_hda_codec_hdmi x86_pkg_temp_thermal snd_hda_intel coretemp kvm_intel snd_hda_codec i915 kvm snd_hwdep snd_pcm_oss snd_mixer_oss crc32_pclmul snd_pcm crc32c_intel e1000e intel_agp igb ghash_clmulni_intel intel_gtt aesni_intel cfbfillrect aes_x86_64 cfbimgblt lrw cfbcopyarea drm_kms_helper ptp video thermal processor gf128mul snd_page_alloc drm snd_timer glue_helper 8250_pci snd pps_core ablk_helper agpgart cryptd sg soundcore fan i2c_algo_bit sr_mod thermal_sys 8250 i2c_i801 serial_core
hwmon cdrom i2c_core evdev button
[ 354.803086] CPU: 0 PID: 482 Comm: kworker/0:1 Not tainted 3.11.2 #1
[ 354.803087] Hardware name: Supermicro X10SAE/X10SAE, BIOS 1.00 05/03/2013 [ 354.803091] Workqueue: events console_callback
[ 354.803092] 0000000000000009 ffff88023611db48 ffffffff814048ac ffff88023611db90
[ 354.803093] ffff88023611db80 ffffffff8103d4e3 ffff880230d82800 ffff880230f9b800
[ 354.803094] ffff880230f99000 ffff880230f99448 ffff8802351c0e00 ffff88023611dbe0
[ 354.803094] Call Trace:
[ 354.803098] [<ffffffff814048ac>] dump_stack+0x54/0x8d
[ 354.803101] [<ffffffff8103d4e3>] warn_slowpath_common+0x73/0x90
[ 354.803103] [<ffffffff8103d547>] warn_slowpath_fmt+0x47/0x50
[ 354.803109] [<ffffffffa089f1be>] ? intel_ddi_connector_get_hw_state+0x5e/0x110 [i915]
[ 354.803114] [<ffffffffa0896974>] intel_modeset_check_state+0x764/0x770 [i915]
[ 354.803117] [<ffffffffa08969bb>] intel_connector_dpms+0x3b/0x60 [i915]
[ 354.803120] [<ffffffffa037e1d0>] drm_fb_helper_dpms.isra.11+0x120/0x160 [drm_kms_helper]
[ 354.803122] [<ffffffffa037e24e>] drm_fb_helper_blank+0x3e/0x80 [drm_kms_helper]
[ 354.803123] [<ffffffff812116c2>] fb_blank+0x52/0xc0
[ 354.803125] [<ffffffff8121e04b>] fbcon_blank+0x21b/0x2d0
[ 354.803127] [<ffffffff81062243>] ? update_rq_clock.part.74+0x13/0x30
[ 354.803129] [<ffffffff81047486>] ? lock_timer_base.isra.30+0x26/0x50
[ 354.803130] [<ffffffff810472b2>] ? internal_add_timer+0x12/0x40
[ 354.803131] [<ffffffff81047f48>] ? mod_timer+0xf8/0x1c0
[ 354.803133] [<ffffffff81266d61>] do_unblank_screen+0xa1/0x1c0
[ 354.803134] [<ffffffff81268087>] poke_blanked_console+0xc7/0xd0
[ 354.803136] [<ffffffff812681cf>] console_callback+0x13f/0x160
[ 354.803137] [<ffffffff81053258>] process_one_work+0x148/0x3d0
[ 354.803138] [<ffffffff81053f19>] worker_thread+0x119/0x3a0
[ 354.803140] [<ffffffff81053e00>] ? manage_workers.isra.30+0x2a0/0x2a0
[ 354.803141] [<ffffffff8105994b>] kthread+0xbb/0xc0
[ 354.803142] [<ffffffff81059890>] ? kthread_create_on_node+0x120/0x120
[ 354.803144] [<ffffffff8140b32c>] ret_from_fork+0x7c/0xb0
[ 354.803145] [<ffffffff81059890>] ? kthread_create_on_node+0x120/0x120
This regression goes back to the big modeset rework and the conversion
to the new dpms helpers which started with:
commit 5ab432ef4997ce32c9406721b37ef6e97e57dae1
Author: Daniel Vetter <daniel.vetter@ffwll.ch>
Date: Sat Jun 30 08:59:56 2012 +0200
drm/i915/hdmi: convert to encoder->disable/enable
Fixes: igt/kms_flip/dpms-off-confusion
Reported-and-tested-by: Wakko Warner <wakko@animx.eu.org>
Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=68030
Link: http://lkml.kernel.org/r/20130928185023.GA21672@animx.eu.org
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Cc: stable@vger.kernel.org
[danvet: Add regression citation, mention the igt testcase this fixes
and slap a cc: stable on the patch.]
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
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Power Well in use forces constantly PSR to exit.
On recent Kernel I noticed that PSR Performance Counter was always 0
indicating that PSR was never really achieved.
By masking LPSP, PSR can work normally and save power on Haswell.
Two bugs had been raised with PSR flag enabled:
- "Screen flickers when booted by enabling PSR in the kernel (i915.enable_psr=1) , the system is booting to a gray screen."
- "When booting the DUT with PSR feature enabled in the kernel (i915.enable_psr=1) , the system is booting to a gray screen."
Both bugs has been fixed by this patch.
v2: proper comment for -fixes
Tested-by: Selvaraj, Elavarasan <elavarasanx.selvaraj@intel.com>
Signed-off-by: Rodrigo Vivi <rodrigo.vivi@gmail.com>
Cc: stable@vger.kernel.org
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
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Otherwise using any atomic memory operation will lock up the GPU due
to a Haswell hardware bug.
v2: Use the _MASKED_BIT_ENABLE macro. Drop drm parameter definition.
Signed-off-by: Francisco Jerez <currojerez@riseup.net>
Reviewed-by: Ben Widawsky <ben@bwidawsk.net>
Cc: Daniel Vetter <daniel@ffwll.ch>
Cc: <stable@vger.kernel.org>
[danvet: Fix checkpatch fail.]
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
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During driver loading we are initializing rps.vlv_work in
valleyview_enable_rps() via the rps.delayed_resume_work delayed work.
This is too late since we are using vlv_work already via
i915_driver_load()->intel_uncore_sanitize()->
intel_disable_gt_powersave(). This at least leads to the following
kernel warning:
INFO: trying to register non-static key.
the code is fine but needs lockdep annotation.
turning off the locking correctness validator.
Fix this by initialzing vlv_work before we call intel_uncore_sanitize().
The regression was introduced in
commit 7dcd2677ea912573d9ed4bcd629b0023b2d11505
Author: Konstantin Khlebnikov <khlebnikov@openvz.org>
Date: Wed Jul 17 10:22:58 2013 +0400
drm/i915: fix long-standing SNB regression in power consumption
after resume
though there was no good reason to initialize the static vlv_work from
another delayed work to begin with (especially since this will happen
multiple times).
Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=69397
Tested-by: shui yangwei <yangweix.shui@intel.com>
Signed-off-by: Imre Deak <imre.deak@intel.com>
Cc: stable@vger.kernel.org
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
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Commit c0f04d88e46d ("bcache: Fix flushes in writeback mode") was fixing
a reported data corruption bug, but it seems some last minute
refactoring or rebasing introduced a null pointer deref.
Signed-off-by: Kent Overstreet <kmo@daterainc.com>
Cc: linux-stable <stable@vger.kernel.org> # >= v3.10
Reported-by: Gabriel de Perthuis <g2p.code@gmail.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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git://git.kernel.org/pub/scm/linux/kernel/git/groeck/linux-staging
Pull hwmon fix from Guenter Roeck:
"Fix root cause of crash/error seen in applesmc driver"
* tag 'hwmon-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/groeck/linux-staging:
hwmon: (applesmc) Always read until end of data
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The crash reported and investigated in commit 5f4513 turned out to be
caused by a change to the read interface on newer (2012) SMCs.
Tests by Chris show that simply reading the data valid line is enough
for the problem to go away. Additional tests show that the newer SMCs
no longer wait for the number of requested bytes, but start sending
data right away. Apparently the number of bytes to read is no longer
specified as before, but instead found out by reading until end of
data. Failure to read until end of data confuses the state machine,
which eventually causes the crash.
As a remedy, assuming bit0 is the read valid line, make sure there is
nothing more to read before leaving the read function.
Tested to resolve the original problem, and runtested on MBA3,1,
MBP4,1, MBP8,2, MBP10,1, MBP10,2. The patch seems to have no effect on
machines before 2012.
Tested-by: Chris Murphy <chris@cmurf.com>
Cc: stable@vger.kernel.org
Signed-off-by: Henrik Rydberg <rydberg@euromail.se>
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
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git://git.kernel.org/pub/scm/linux/kernel/git/mmarek/kbuild
Pull kbuild fix from Michal Marek:
"Here is an ARM Makefile fix that you even acked. After nobody wanted
to take it, it ended up in the kbuild tree"
* 'rc-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/mmarek/kbuild:
arm, kbuild: make "make install" not depend on vmlinux
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Install targets (install, zinstall, uinstall) on arm have a dependency
to vmlinux. This may cause parts of the kernel to be rebuilt during
installation. We must avoid this since this may run as root. Install
targets "ABSOLUTELY MUST NOT MODIFY THE SOURCE TREE." as Linus
emphasized this in:
http://lkml.org/lkml/2013/7/10/600
So on arm and maybe other archs we need the same as for x86:
1648e4f8 x86, kbuild: make "make install" not depend on vmlinux
This patch fixes this for arm. Dependencies are removed and instead a
check to install.sh is added for the files that are needed.
This issue was uncovered by this build error where the -j option is
used in conjunction with install targets:
$ make <makeflags>
$ make <makeflags> zinstall
...
DEPMOD
Usage: .../scripts/depmod.sh /sbin/depmod <kernelrelease>
(INSTALL_MOD_PATH and INSTALL_PATH variables set, so no root perms
required in this case.)
The problem is that zinstall on arm due to its dependency to vmlinux
does a prepare/prepare3 and finally does a forced rewrite of
kernel.release even if it exists already.
Rebuilding kernel.release removes it first and then recreates it. This
might race with another parallel make job running depmod.
So this patch should fix this one too.
Also quoting $(KERNELRELEASE) arg for install.sh as this messes
argument order in case it is empty (which is the case if the kernel
was not built yet).
Signed-off-by: Robert Richter <robert.richter@linaro.org>
Signed-off-by: Robert Richter <rric@kernel.org>
Acked-by: Michal Marek <mmarek@suse.cz>.
Acked-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: "Yann E. MORIN" <yann.morin.1998@free.fr>
Signed-off-by: Michal Marek <mmarek@suse.cz>
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Pull watchdog fix from Wim Van Sebroeck:
"Make sure that the hpwdt driver will not load auxilary iLO devices"
* git://www.linux-watchdog.org/linux-watchdog:
watchdog: hpwdt: Patch to ignore auxilary iLO devices
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This patch is to prevent hpwdt from loading on any auxilary iLO devices defined
after the initial (or main) iLO device. All auxilary iLO devices will have a
subsystem device ID set to 0x1979 in order for hpwdt to differentiate between
the two types.
Signed-off-by: Thomas Mingarelli <thomas.mingarelli@hp.com>
Tested-by: Lisa Mitchell <lisa.mitchell@hp.com>
Signed-off-by: Wim Van Sebroeck <wim@iguana.be>
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Useful for locating buggy drivers on kernel oops.
It may add dozens of new lines to boot dmesg. DEBUG_KOBJECT_RELEASE is
hopefully only enabled in debug kernels (like maybe the Fedora rawhide
one, or at developers), so being a bit more verbose is likely ok.
Acked-by: Russell King <rmk+kernel@arm.linux.org.uk>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Fengguang Wu <fengguang.wu@intel.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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git://git.kernel.org/pub/scm/linux/kernel/git/tytso/random
Pull /dev/random changes from Ted Ts'o:
"These patches are designed to enable improvements to /dev/random for
non-x86 platforms, in particular MIPS and ARM"
* tag 'random_for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tytso/random:
random: allow architectures to optionally define random_get_entropy()
random: run random_int_secret_init() run after all late_initcalls
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Allow architectures which have a disabled get_cycles() function to
provide a random_get_entropy() function which provides a fine-grained,
rapidly changing counter that can be used by the /dev/random driver.
For example, an architecture might have a rapidly changing register
used to control random TLB cache eviction, or DRAM refresh that
doesn't meet the requirements of get_cycles(), but which is good
enough for the needs of the random driver.
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
Cc: stable@vger.kernel.org
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The some platforms (e.g., ARM) initializes their clocks as
late_initcalls for some unknown reason. So make sure
random_int_secret_init() is run after all of the late_initcalls are
run.
Cc: stable@vger.kernel.org
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
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Pull kvm fixes from Paolo Bonzini:
"Fixes for 3.12-rc5: two old PPC bugs and one new (3.12-rc2) x86 bug"
* tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm:
kvm: ppc: booke: check range page invalidation progress on page setup
KVM: PPC: Book3S HV: Fix typo in saving DSCR
KVM: nVMX: fix shadow on EPT
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When the MM code is invalidating a range of pages, it calls the KVM
kvm_mmu_notifier_invalidate_range_start() notifier function, which calls
kvm_unmap_hva_range(), which arranges to flush all the TLBs for guest pages.
However, the Linux PTEs for the range being flushed are still valid at
that point. We are not supposed to establish any new references to pages
in the range until the ...range_end() notifier gets called.
The PPC-specific KVM code doesn't get any explicit notification of that;
instead, we are supposed to use mmu_notifier_retry() to test whether we
are or have been inside a range flush notifier pair while we have been
referencing a page.
This patch calls the mmu_notifier_retry() while mapping the guest
page to ensure we are not referencing a page when in range invalidation.
This call is inside a region locked with kvm->mmu_lock, which is the
same lock that is called by the KVM MMU notifier functions, thus
ensuring that no new notification can proceed while we are in the
locked region.
Signed-off-by: Bharat Bhushan <bharat.bhushan@freescale.com>
Acked-by: Alexander Graf <agraf@suse.de>
[Backported to 3.12 - Paolo]
Reviewed-by: Bharat Bhushan <bharat.bhushan@freescale.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
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This fixes a typo in the code that saves the guest DSCR (Data Stream
Control Register) into the kvm_vcpu_arch struct on guest exit. The
effect of the typo was that the DSCR value was saved in the wrong place,
so changes to the DSCR by the guest didn't persist across guest exit
and entry, and some host kernel memory got corrupted.
Cc: stable@vger.kernel.org [v3.1+]
Signed-off-by: Paul Mackerras <paulus@samba.org>
Acked-by: Alexander Graf <agraf@suse.de>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
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72f857950f6f19 broke shadow on EPT. This patch reverts it and fixes PAE
on nEPT (which reverted commit fixed) in other way.
Shadow on EPT is now broken because while L1 builds shadow page table
for L2 (which is PAE while L2 is in real mode) it never loads L2's
GUEST_PDPTR[0-3]. They do not need to be loaded because without nested
virtualization HW does this during guest entry if EPT is disabled,
but in our case L0 emulates L2's vmentry while EPT is enables, so we
cannot rely on vmcs12->guest_pdptr[0-3] to contain up-to-date values
and need to re-read PDPTEs from L2 memory. This is what kvm_set_cr3()
is doing, but by clearing cache bits during L2 vmentry we drop values
that kvm_set_cr3() read from memory.
So why the same code does not work for PAE on nEPT? kvm_set_cr3()
reads pdptes into vcpu->arch.walk_mmu->pdptrs[]. walk_mmu points to
vcpu->arch.nested_mmu while nested guest is running, but ept_load_pdptrs()
uses vcpu->arch.mmu which contain incorrect values. Fix that by using
walk_mmu in ept_(load|save)_pdptrs.
Signed-off-by: Gleb Natapov <gleb@redhat.com>
Reviewed-by: Paolo Bonzini <pbonzini@redhat.com>
Tested-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
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git://git.kernel.org/pub/scm/linux/kernel/git/broonie/spi
Pull spi fixes from Mark Brown:
"This is all driver updates, mostly fixes for error handling paths
except for the s3c64xx and hspi fixes for trying to use runtime PM
before it is enabled and the pxa2xx fix for interactions between power
management and interrupt handling"
* tag 'spi-v3.12-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/broonie/spi:
spi: atmel: Fix incorrect error path
spi/hspi: fixup Runtime PM enable timing
spi/s3c64xx: Ensure runtime PM is enabled prior to registration
spi/clps711x: drop clk_put for devm_clk_get in spi_clps711x_probe()
spi: fix return value check in dspi_probe()
spi: mpc512x: fix error return code in mpc512x_psc_spi_do_probe()
spi: clps711x: Don't call kfree() after spi_master_put/spi_unregister_master
spi/pxa2xx: check status register as well to determine if the device is off
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