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982,081 commits

Author SHA1 Message Date
Logan Gunthorpe
2c84d818ae PCI/P2PDMA: Factor out host_bridge_whitelist()
Push both PCI devices into the whitelist checking function seeing some
hardware will require us ensuring they are on the same host bridge.

At the same time we rename root_complex_whitelist() to
host_bridge_whitelist() to match the terminology used in the code.

Link: https://lore.kernel.org/r/20190730163545.4915-7-logang@deltatee.com
Link: https://lore.kernel.org/r/20190812173048.9186-7-logang@deltatee.com
Signed-off-by: Logan Gunthorpe <logang@deltatee.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
2019-08-16 08:40:59 -05:00
Logan Gunthorpe
e2cbfbf789 PCI/P2PDMA: Apply host bridge whitelist for ACS
When a P2PDMA transfer is rejected due to ACS being set, we can also check
the whitelist and allow the transactions.

Do this by pushing the whitelist check into the upstream_bridge_distance()
function.

Link: https://lore.kernel.org/r/20190730163545.4915-6-logang@deltatee.com
Link: https://lore.kernel.org/r/20190812173048.9186-6-logang@deltatee.com
Signed-off-by: Logan Gunthorpe <logang@deltatee.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Reviewed-by: Christian König <christian.koenig@amd.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
2019-08-16 08:40:50 -05:00
Logan Gunthorpe
c6bfaeb573 PCI/P2PDMA: Factor out __upstream_bridge_distance()
This is a prep patch to create a second level helper. There are no
functional changes.

The root complex whitelist code will be moved into this function in a
subsequent patch.

Link: https://lore.kernel.org/r/20190730163545.4915-5-logang@deltatee.com
Link: https://lore.kernel.org/r/20190812173048.9186-5-logang@deltatee.com
Signed-off-by: Logan Gunthorpe <logang@deltatee.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Reviewed-by: Christian König <christian.koenig@amd.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
2019-08-16 08:40:38 -05:00
Logan Gunthorpe
72583084e3 PCI/P2PDMA: Add constants for map type results to upstream_bridge_distance()
Add constant flags to indicate how two devices will be mapped or if they
are unsupported. upstream_bridge_distance() will now return the
mapping type and the distance in a passed-by-reference argument.

This helps annotate the code better, but the main reason is so we can use
the information to store the required mapping method in an xarray.

Link: https://lore.kernel.org/r/20190730163545.4915-4-logang@deltatee.com
Link: https://lore.kernel.org/r/20190812173048.9186-4-logang@deltatee.com
Signed-off-by: Logan Gunthorpe <logang@deltatee.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Reviewed-by: Christian König <christian.koenig@amd.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
2019-08-16 08:40:23 -05:00
Logan Gunthorpe
0afea38143 PCI/P2PDMA: Add provider's pci_dev to pci_p2pdma_pagemap struct
The provider will be needed to figure out how to map a device.

Link: https://lore.kernel.org/r/20190730163545.4915-3-logang@deltatee.com
Link: https://lore.kernel.org/r/20190812173048.9186-3-logang@deltatee.com
Signed-off-by: Logan Gunthorpe <logang@deltatee.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
2019-08-16 08:40:05 -05:00
Logan Gunthorpe
a6e6fe6549 PCI/P2PDMA: Introduce private pagemap structure
Move the PCI bus offset from the generic dev_pagemap structure to a
specific pci_p2pdma_pagemap structure.

This structure will grow in subsequent patches.

Link: https://lore.kernel.org/r/20190730163545.4915-2-logang@deltatee.com
Link: https://lore.kernel.org/r/20190812173048.9186-2-logang@deltatee.com
Signed-off-by: Logan Gunthorpe <logang@deltatee.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
2019-08-16 08:38:52 -05:00
Jacopo Mondi
a53358a31c drm: rcar_lvds: Fix dual link mode operations
The R-Car LVDS encoder units support dual-link operations by splitting
the pixel output between the primary encoder and the companion encoder.

Currently the companion encoder fails at probe time, causing the
registration of the primary to fail as well, preventing the whole DU unit
from being registered at all.

Fix this by not bailing out from probe with error if the
"renesas,companion" property is not specified.

Fixes: fa440d8703 ("drm: rcar-du: lvds: Add support for dual-link mode")
Reported-by: Fabrizio Castro <fabrizio.castro@bp.renesas.com>
Signed-off-by: Jacopo Mondi <jacopo+renesas@jmondi.org>
Reviewed-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>
Signed-off-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>
2019-08-16 15:53:28 +03:00
Fabrizio Castro
0b936e6122 drm: rcar-du: lvds: Fix bridge_to_rcar_lvds
Using name "bridge" for macro bridge_to_rcar_lvds argument doesn't
work when the pointer name used by the caller is not "bridge".
Rename the argument to "b" to allow for any pointer name.

While at it, fix the connector_to_rcar_lvds macro similarly.

Fixes: c6a27fa41f ("drm: rcar-du: Convert LVDS encoder code to bridge driver")
Signed-off-by: Fabrizio Castro <fabrizio.castro@bp.renesas.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>
[Fix connector_to_rcar_lvds]
Signed-off-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>
2019-08-16 15:50:27 +03:00
Laurent Pinchart
dbbfaf5f26 drm: Remove bridge support from legacy helpers
DRM bridges are only used by atomic drivers, and none of them use the
legacy helpers. Drop bridge support from those helpers to prepare for
making the bridge operations atomic-aware.

Signed-off-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>
Reviewed-by: Sean Paul <seanpaul@chromium.org>
Acked-by: Daniel Vetter <daniel.vetter@ffwll.ch>
2019-08-16 15:50:27 +03:00
Laurent Pinchart
71f6bd791e drm: Don't include drm/drm_encoder_slave.h when not needed
The dw-hdmi, kirin and imx drivers include the drm/drm_encoder_slave.h
header but don't use the encoder slave API. Remove it or replace it with
drm/drm_encoder.h as needed.

Signed-off-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>
Reviewed-by: Daniel Vetter <daniel.vetter@ffwll.ch>
2019-08-16 15:50:27 +03:00
Andy Yan
fc702ed49a arm64: dts: rockchip: Add dts for Leez RK3399 P710 SBC
P710 is a RK3399 based SBC, designed by Leez [0].

Specification
- Rockchip RK3399
- 4/2GB LPDDR4
- TF sd scard slot
- eMMC
- M.2 B-Key for 4G LTE
- AP6256 for WiFi + BT
- Gigabit ethernet
- HDMI out
- 40 pin header
- USB 2.0 x 2
- USB 3.0 x 1
- USB 3.0 Type-C x 1
- TYPE-C Power supply

[0]https://leez.lenovo.com

Signed-off-by: Andy Yan <andyshrk@gmail.com>
Reviewed-by: Rob Herring <robh@kernel.org>
Signed-off-by: Heiko Stuebner <heiko@sntech.de>
2019-08-16 14:39:20 +02:00
Rafael J. Wysocki
a3ee2477c4 Merge branch 'pm-cpufreq'
* pm-cpufreq:
  cpufreq: schedutil: Don't skip freq update when limits change
  cpufreq: dev_pm_qos_update_request() can return 1 on success
2019-08-16 14:24:51 +02:00
John Hubbard
a90118c445 x86/boot: Save fields explicitly, zero out everything else
Recent gcc compilers (gcc 9.1) generate warnings about an out of bounds
memset, if the memset goes accross several fields of a struct. This
generated a couple of warnings on x86_64 builds in sanitize_boot_params().

Fix this by explicitly saving the fields in struct boot_params
that are intended to be preserved, and zeroing all the rest.

[ tglx: Tagged for stable as it breaks the warning free build there as well ]

Suggested-by: Thomas Gleixner <tglx@linutronix.de>
Suggested-by: H. Peter Anvin <hpa@zytor.com>
Signed-off-by: John Hubbard <jhubbard@nvidia.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Cc: stable@vger.kernel.org
Link: https://lkml.kernel.org/r/20190731054627.5627-2-jhubbard@nvidia.com
2019-08-16 14:20:00 +02:00
Chuhong Yuan
d30bdfc0ec PM: sleep: Replace strncmp() with str_has_prefix()
Use str_has_prefix() instead of strncmp() which is less
straightforward in decode_state().

Signed-off-by: Chuhong Yuan <hslester96@gmail.com>
[ rjw: Subject & changelog ]
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2019-08-16 14:18:53 +02:00
Rikard Falkeborn
d5a1baddf1 x86/boot: Use common BUILD_BUG_ON
Defining BUILD_BUG_ON causes redefinition warnings when adding includes of
include/linux/build_bug.h in files unrelated to x86/boot.  For example,
adding an include of build_bug.h to include/linux/bits.h shows the
following warnings:

  CC      arch/x86/boot/cpucheck.o
  In file included from ./include/linux/bits.h:22,
                   from ./arch/x86/include/asm/msr-index.h:5,
                   from arch/x86/boot/cpucheck.c:28:
  ./include/linux/build_bug.h:49: warning: "BUILD_BUG_ON" redefined
     49 | #define BUILD_BUG_ON(condition) \
        |
  In file included from arch/x86/boot/cpucheck.c:22:
  arch/x86/boot/boot.h:31: note: this is the location of the previous definition
     31 | #define BUILD_BUG_ON(condition) ((void)sizeof(char[1 - 2*!!(condition)]))
        |

The macro was added to boot.h in commit 62bd0337d0 ("Top header file for
new x86 setup code"). At that time, BUILD_BUG_ON was defined in
kernel.h. Presumably BUILD_BUG_ON was redefined to avoid pulling in
kernel.h. Since then, BUILD_BUG_ON and similar macros have been split to a
separate header file.

Signed-off-by: Rikard Falkeborn <rikard.falkeborn@gmail.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Kees Cook <keescook@chromium.org>
Link: https://lkml.kernel.org/r/20190811184938.1796-2-rikard.falkeborn@gmail.com
2019-08-16 14:15:50 +02:00
Pierre-Louis Bossart
6e3360cd07
ASoC: SOF: pcm: add ALH support
Even if ALH has no specific configuration, we still need to handle the
common parameters for all DAIs

Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Link: https://lore.kernel.org/r/20190815192018.30570-5-pierre-louis.bossart@linux.intel.com
Signed-off-by: Mark Brown <broonie@kernel.org>
2019-08-16 13:13:59 +01:00
Pierre-Louis Bossart
4d6bbf1a01
ASoC: SOF: topology: initial support for Intel ALH DAI type
The Audio Link Hub DAI does not require any static configuration from
topology for now. We still need to pass the frame rate and format to
firmware.

Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Link: https://lore.kernel.org/r/20190815192018.30570-4-pierre-louis.bossart@linux.intel.com
Signed-off-by: Mark Brown <broonie@kernel.org>
2019-08-16 13:13:39 +01:00
Bard liao
8207a1c491
ASoC: SOF: rename SOUNDWIRE to ALH
Rename SOUNDWIRE to ALH.

Signed-off-by: Bard liao <yung-chuan.liao@linux.intel.com>
Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Link: https://lore.kernel.org/r/20190815192018.30570-3-pierre-louis.bossart@linux.intel.com
Signed-off-by: Mark Brown <broonie@kernel.org>
2019-08-16 13:13:21 +01:00
Daniel Baluta
f59b16ef4c
ASoC: SOF: topology: Add dummy support for i.MX8 DAIs
Add dummy support for SAI/ESAI digital audio interface
IPs found on i.MX8 boards.

Signed-off-by: Daniel Baluta <daniel.baluta@nxp.com>
Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Link: https://lore.kernel.org/r/20190815192018.30570-2-pierre-louis.bossart@linux.intel.com
Signed-off-by: Mark Brown <broonie@kernel.org>
2019-08-16 13:13:02 +01:00
Shengjiu Wang
8661ab5b23
ASoC: imx-audmux: Add driver suspend and resume to support MEGA Fast
For i.MX6 SoloX, there is a mode of the SoC to shutdown all power
source of modules during system suspend and resume procedure.
Thus, AUDMUX needs to save all the values of registers before the
system suspend and restore them after the system resume.

Signed-off-by: Shengjiu Wang <shengjiu.wang@nxp.com>
Link: https://lore.kernel.org/r/1565931794-7218-1-git-send-email-shengjiu.wang@nxp.com
Signed-off-by: Mark Brown <broonie@kernel.org>
2019-08-16 13:12:03 +01:00
Andrius Štikonas
22c65d80af arm64: dts: rockchip: enable internal SPI flash for RockPro64.
The rockpro64 contains a nor-flash chip connected to spi1.

Signed-off-by: Andrius Štikonas <andrius@stikonas.eu>
[a number of cleanups]
Signed-off-by: Heiko Stuebner <heiko@sntech.de>
2019-08-16 13:50:08 +02:00
Chris Wilson
b016cd6ed4 dma-buf: Restore seqlock around dma_resv updates
This reverts
67c97fb79a ("dma-buf: add reservation_object_fences helper")
dd7a7d1ff2 ("drm/i915: use new reservation_object_fences helper")
0e1d8083bd ("dma-buf: further relax reservation_object_add_shared_fence")
5d344f58da ("dma-buf: nuke reservation_object seq number")

The scenario that defeats simply grabbing a set of shared/exclusive
fences and using them blissfully under RCU is that any of those fences
may be reallocated by a SLAB_TYPESAFE_BY_RCU fence slab cache. In this
scenario, while keeping the rcu_read_lock we need to establish that no
fence was changed in the dma_resv after a read (or full) memory barrier.

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Daniel Vetter <daniel.vetter@ffwll.ch>
Acked-by: Christian König <christian.koenig@amd.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20190814182401.25009-1-chris@chris-wilson.co.uk
2019-08-16 12:40:58 +01:00
Douglas Anderson
3c29ba8e7c Revert "ARM: dts: rockchip: add startup delay to rk3288-veyron panel-regulators"
This reverts commit 1f45e8c6d0.

This 100 ms mystery delay is not on downstream kernels and no longer
seems needed on upstream kernels either [1].  Presumably something in the
meantime has made things better.  A few possibilities for patches that
have landed in the meantime that could have made this better are
commit 3157694d8c ("pwm-backlight: Add support for PWM delays
proprieties."), commit 5fb5caee92 ("pwm-backlight: Enable/disable
the PWM before/after LCD enable toggle."), and commit 6d5922dd0d
("ARM: dts: rockchip: set PWM delay backlight settings for Veyron")

Let's revert and get our 100 ms back.

[1] https://lkml.kernel.org/r/2226970.BAPq4liE1j@diego

Signed-off-by: Douglas Anderson <dianders@chromium.org>
[rebased on top of the recent veyron display cleanup]
Signed-off-by: Heiko Stuebner <heiko@sntech.de>
2019-08-16 13:27:05 +02:00
Andy Shevchenko
109e8adfbc platform/x86: asus-wmi: Remove unnecessary blank lines
Remove blank lines where they are not needed.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
2019-08-16 14:20:35 +03:00
Andy Shevchenko
127e1dfc66 platform/x86: asus-wmi: Drop indentation level by inverting conditionals
We have extra indentation level where it can be avoided by changing conditional
to the inverted one.

Do it here for three such locations in the driver.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
2019-08-16 14:20:35 +03:00
Andy Shevchenko
2275752004 platform/x86: asus-wmi: Use clamp_val() instead of open coded variant
There is no need to open code clamp_val() macro implementation.
Replace the corresponding lines with direct call to clamp_val().

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
2019-08-16 14:20:31 +03:00
Andy Shevchenko
a5556fa110 platform/x86: asus-wmi: Replace sscanf() with kstrtoint()
The use of sscanf() is an overkill here. Moreover, there is no need to check
for count to be 0, since it's guaranteed by sysfs not to be.

Taking above into account, replace sscanf() with kstrtoint() calls.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
2019-08-16 14:20:31 +03:00
Chris Wilson
6ac689d2e3 drm/i915: Use the associated uncore for the vm
We store the gt&uncore to use in the i915_address_space, so use it!

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Reviewed-by: Matthew Auld <matthew.auld@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20190816083143.23558-1-chris@chris-wilson.co.uk
2019-08-16 12:02:59 +01:00
Greg Kroah-Hartman
9cd02b09a0 soundwire fixes for v5.3-rc5
Pierre sent fixes which are queued now for v5.3-rc5 are:
  - regmap dependecy
  - cadence register definitions
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Merge tag 'soundwire-5.3-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/vkoul/soundwire into char-misc-linus

Vinod writes:

soundwire fixes for v5.3-rc5

Pierre sent fixes which are queued now for v5.3-rc5 are:
 - regmap dependecy
 - cadence register definitions

* tag 'soundwire-5.3-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/vkoul/soundwire:
  soundwire: fix regmap dependencies and align with other serial links
  soundwire: cadence_master: fix definitions for INTSTAT0/1
  soundwire: cadence_master: fix register definition for SLAVE_STATE
2019-08-16 12:35:56 +02:00
Greg Kroah-Hartman
6d03c140db USB: phy: fsl-usb: convert platform driver to use dev_groups
Platform drivers now have the option to have the platform core create
and remove any needed sysfs attribute files.  So take advantage of that
and do not register "by hand" any sysfs files.

Acked-by: Felipe Balbi <felipe.balbi@linux.intel.com>
Link: https://lore.kernel.org/r/20190815125903.GA17065@kroah.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2019-08-16 12:33:18 +02:00
Hui Wang
7c0a69394c ALSA: hda - Define a fallback_pin_fixup_tbl for alc269 family
We have another Dell laptop which needs the DELL4_MIC_NO_PRESENCE,
and this laptop has different pincfg definitions from existing
ones in the pintbl, rather adding a new entry, let us define
a tbl in the fallback_pin_fixup_tbl and this tbl will match
all dell machines with alc289 codec and the pins of 0x19 and 0x1b
are undef by default.

Signed-off-by: Hui Wang <hui.wang@canonical.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
2019-08-16 11:59:42 +02:00
Hui Wang
0fc1e447e9 ALSA: hda - Expand pin_match function to match upcoming new tbls
With the existing pintbl, we already have many entries in it. it is
better to figure out a new way to reduce the size of the pintbl.

We plan to define a new tbl which will match more machines with a
single tbl, To do that, this function doesn't need to match all valid
pins between machine and tbl, it just needs to match all pins defined
in the tbl with the machine.

And the plan is to move some tbls from pin_fixup_tbl to
fallback_pin_fixup_tbl gradually.

Signed-off-by: Hui Wang <hui.wang@canonical.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
2019-08-16 11:59:30 +02:00
Andy Shevchenko
84d8e80b0a platform/x86: asus-wmi: Refactor charge_threshold_store()
There are few issues with the current code:
 - the error code from kstrtouint() is shadowed
 - the error code from asus_wmi_set_devstate() is ignored
 - the extra check against 0 for count (this is guaranteed by sysfs)

Fix these issues by doing a slight refactoring of charge_threshold_store().

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
2019-08-16 12:50:12 +03:00
Kristian Klausen
d507a54f58 platform/x86: asus-wmi: Add support for charge threshold
Most newer ASUS laptops supports limiting the battery charge level, which
help prolonging the battery life.

Tested on a Zenbook UX430UNR.

Signed-off-by: Kristian Klausen <kristian@klausen.dk>
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
2019-08-16 12:38:48 +03:00
Kristian Klausen
02a5e9bc86 platform/x86: asus-nb-wmi: Support ALS on the Zenbook UX430UNR
This patch adds support for ALS on the Zenbook UX430UNR to the asus_nb_wmi
driver.

Signed-off-by: Kristian Klausen <kristian@klausen.dk>
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
2019-08-16 12:38:48 +03:00
Hans de Goede
f078d053c8 platform/x86: touchscreen_dmi: Add info for the Irbis TW90 tablet
Add touchscreen info for the Irbis TW90 tablet.

Reported-by: russianneuromancer@ya.ru
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
2019-08-16 12:38:48 +03:00
Giang Le
a0c8097921 platform/x86: touchscreen_dmi: Add info for the Chuwi Surbook Mini tablet
Add touchscreen platform data for the Chuwi Surbook Mini tablet.

Signed-off-by: Giang Le <ohaibuzzle@gmail.com>
Reviewed-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
2019-08-16 12:38:43 +03:00
Chris Wilson
8e7cb1799b drm/i915: Extract intel_frontbuffer active tracking
Move the active tracking for the frontbuffer operations out of the
i915_gem_object and into its own first class (refcounted) object. In the
process of detangling, we switch from low level request tracking to the
easier i915_active -- with the plan that this avoids any potential
atomic callbacks as the frontbuffer tracking wishes to sleep as it
flushes.

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Reviewed-by: Matthew Auld <matthew.auld@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20190816074635.26062-1-chris@chris-wilson.co.uk
2019-08-16 09:51:11 +01:00
Chuhong Yuan
35c35493b0 printk: Replace strncmp() with str_has_prefix()
strncmp(str, const, len) is error-prone because len is easy to have typo.
An example is the hard-coded len has counting error or sizeof(const)
forgets - 1.

So we prefer using newly introduced str_has_prefix() to substitute
such strncmp() to make code better.

Link: http://lkml.kernel.org/r/20190809071034.17279-1-hslester96@gmail.com
Cc: "Steven Rostedt" <rostedt@goodmis.org>
Cc: linux-kernel@vger.kernel.org
Signed-off-by: Chuhong Yuan <hslester96@gmail.com>
Reviewed-by:  Sergey Senozhatsky <sergey.senozhatsky@gmail.com>
[pmladek@suse.com: Slightly updated and reformatted the commit message.]
Signed-off-by: Petr Mladek <pmladek@suse.com>
2019-08-16 09:54:08 +02:00
Wei Yongjun
e03250061b btf: fix return value check in btf_vmlinux_init()
In case of error, the function kobject_create_and_add() returns NULL
pointer not ERR_PTR(). The IS_ERR() test in the return value check
should be replaced with NULL test.

Fixes: 341dfcf8d7 ("btf: expose BTF info through sysfs")
Signed-off-by: Wei Yongjun <weiyongjun1@huawei.com>
Acked-by: Andrii Nakryiko <andriin@fb.com>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
2019-08-15 22:18:17 -07:00
Quentin Monnet
d34b044038 tools: bpftool: close prog FD before exit on showing a single program
When showing metadata about a single program by invoking
"bpftool prog show PROG", the file descriptor referring to the program
is not closed before returning from the function. Let's close it.

Fixes: 71bb428fe2 ("tools: bpf: add bpftool")
Signed-off-by: Quentin Monnet <quentin.monnet@netronome.com>
Reviewed-by: Jakub Kicinski <jakub.kicinski@netronome.com>
Acked-by: Andrii Nakryiko <andriin@fb.com>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
2019-08-15 22:09:41 -07:00
Alexei Starovoitov
82c4c3b7c7 Merge branch 'fix-printf'
Quentin Monnet says:

====================
Because the "__printf()" attributes were used only where the functions are
implemented, and not in header files, the checks have not been enforced on
all the calls to printf()-like functions, and a number of errors slipped in
bpftool over time.

This set cleans up such errors, and then moves the "__printf()" attributes
to header files, so that the checks are performed at all locations.
====================

Signed-off-by: Alexei Starovoitov <ast@kernel.org>
2019-08-15 22:06:47 -07:00
Quentin Monnet
8918dc42dc tools: bpftool: move "__printf()" attributes to header file
Some functions in bpftool have a "__printf()" format attributes to tell
the compiler they should expect printf()-like arguments. But because
these attributes are not used for the function prototypes in the header
files, the compiler does not run the checks everywhere the functions are
used, and some mistakes on format string and corresponding arguments
slipped in over time.

Let's move the __printf() attributes to the correct places.

Note: We add guards around the definition of GCC_VERSION in
tools/include/linux/compiler-gcc.h to prevent a conflict in jit_disasm.c
on GCC_VERSION from headers pulled via libbfd.

Fixes: c101189bc9 ("tools: bpftool: fix -Wmissing declaration warnings")
Reported-by: Jakub Kicinski <jakub.kicinski@netronome.com>
Signed-off-by: Quentin Monnet <quentin.monnet@netronome.com>
Reviewed-by: Jakub Kicinski <jakub.kicinski@netronome.com>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
2019-08-15 22:06:46 -07:00
Quentin Monnet
b0ead6d75a tools: bpftool: fix format string for p_err() in detect_common_prefix()
There is one call to the p_err() function in detect_common_prefix()
where the message to print is passed directly as the first argument,
without using a format string. This is harmless, but may trigger
warnings if the "__printf()" attribute is used correctly for the p_err()
function. Let's fix it by using a "%s" format string.

Fixes: ba95c74524 ("tools: bpftool: add "prog run" subcommand to test-run programs")
Signed-off-by: Quentin Monnet <quentin.monnet@netronome.com>
Reviewed-by: Jakub Kicinski <jakub.kicinski@netronome.com>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
2019-08-15 22:06:46 -07:00
Quentin Monnet
8a15d5ced8 tools: bpftool: fix format string for p_err() in query_flow_dissector()
The format string passed to one call to the p_err() function in
query_flow_dissector() does not match the value that should be printed,
resulting in some garbage integer being printed instead of
strerror(errno) if /proc/self/ns/net cannot be open. Let's fix the
format string.

Fixes: 7f0c57fec8 ("bpftool: show flow_dissector attachment status")
Signed-off-by: Quentin Monnet <quentin.monnet@netronome.com>
Reviewed-by: Jakub Kicinski <jakub.kicinski@netronome.com>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
2019-08-15 22:06:46 -07:00
Quentin Monnet
ed4a3983cd tools: bpftool: fix argument for p_err() in BTF do_dump()
The last argument passed to one call to the p_err() function is not
correct, it should be "*argv" instead of "**argv". This may lead to a
segmentation fault error if BTF id cannot be parsed correctly. Let's fix
this.

Fixes: c93cc69004dt ("bpftool: add ability to dump BTF types")
Signed-off-by: Quentin Monnet <quentin.monnet@netronome.com>
Reviewed-by: Jakub Kicinski <jakub.kicinski@netronome.com>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
2019-08-15 22:06:46 -07:00
Quentin Monnet
22c349e8db tools: bpftool: fix format strings and arguments for jsonw_printf()
There are some mismatches between format strings and arguments passed to
jsonw_printf() in the BTF dumper for bpftool, which seems harmless but
may result in warnings if the "__printf()" attribute is used correctly
for jsonw_printf(). Let's fix relevant format strings and type cast.

Fixes: b12d6ec097 ("bpf: btf: add btf print functionality")
Signed-off-by: Quentin Monnet <quentin.monnet@netronome.com>
Reviewed-by: Jakub Kicinski <jakub.kicinski@netronome.com>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
2019-08-15 22:06:46 -07:00
Quentin Monnet
9def249dc8 tools: bpftool: fix arguments for p_err() in do_event_pipe()
The last argument passed to some calls to the p_err() functions is not
correct, it should be "*argv" instead of "**argv". This may lead to a
segmentation fault error if CPU IDs or indices from the command line
cannot be parsed correctly. Let's fix this.

Fixes: f412eed9df ("tools: bpftool: add simple perf event output reader")
Signed-off-by: Quentin Monnet <quentin.monnet@netronome.com>
Reviewed-by: Jakub Kicinski <jakub.kicinski@netronome.com>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
2019-08-15 22:06:46 -07:00
Paul Mackerras
da15c03b04 powerpc/xive: Implement get_irqchip_state method for XIVE to fix shutdown race
Testing has revealed the existence of a race condition where a XIVE
interrupt being shut down can be in one of the XIVE interrupt queues
(of which there are up to 8 per CPU, one for each priority) at the
point where free_irq() is called.  If this happens, can return an
interrupt number which has been shut down.  This can lead to various
symptoms:

- irq_to_desc(irq) can be NULL.  In this case, no end-of-interrupt
  function gets called, resulting in the CPU's elevated interrupt
  priority (numerically lowered CPPR) never gets reset.  That then
  means that the CPU stops processing interrupts, causing device
  timeouts and other errors in various device drivers.

- The irq descriptor or related data structures can be in the process
  of being freed as the interrupt code is using them.  This typically
  leads to crashes due to bad pointer dereferences.

This race is basically what commit 62e0468650 ("genirq: Add optional
hardware synchronization for shutdown", 2019-06-28) is intended to
fix, given a get_irqchip_state() method for the interrupt controller
being used.  It works by polling the interrupt controller when an
interrupt is being freed until the controller says it is not pending.

With XIVE, the PQ bits of the interrupt source indicate the state of
the interrupt source, and in particular the P bit goes from 0 to 1 at
the point where the hardware writes an entry into the interrupt queue
that this interrupt is directed towards.  Normally, the code will then
process the interrupt and do an end-of-interrupt (EOI) operation which
will reset PQ to 00 (assuming another interrupt hasn't been generated
in the meantime).  However, there are situations where the code resets
P even though a queue entry exists (for example, by setting PQ to 01,
which disables the interrupt source), and also situations where the
code leaves P at 1 after removing the queue entry (for example, this
is done for escalation interrupts so they cannot fire again until
they are explicitly re-enabled).

The code already has a 'saved_p' flag for the interrupt source which
indicates that a queue entry exists, although it isn't maintained
consistently.  This patch adds a 'stale_p' flag to indicate that
P has been left at 1 after processing a queue entry, and adds code
to set and clear saved_p and stale_p as necessary to maintain a
consistent indication of whether a queue entry may or may not exist.

With this, we can implement xive_get_irqchip_state() by looking at
stale_p, saved_p and the ESB PQ bits for the interrupt.

There is some additional code to handle escalation interrupts
properly; because they are enabled and disabled in KVM assembly code,
which does not have access to the xive_irq_data struct for the
escalation interrupt.  Hence, stale_p may be incorrect when the
escalation interrupt is freed in kvmppc_xive_{,native_}cleanup_vcpu().
Fortunately, we can fix it up by looking at vcpu->arch.xive_esc_on,
with some careful attention to barriers in order to ensure the correct
result if xive_esc_irq() races with kvmppc_xive_cleanup_vcpu().

Finally, this adds code to make noise on the console (pr_crit and
WARN_ON(1)) if we find an interrupt queue entry for an interrupt
which does not have a descriptor.  While this won't catch the race
reliably, if it does get triggered it will be an indication that
the race is occurring and needs to be debugged.

Fixes: 243e25112d ("powerpc/xive: Native exploitation of the XIVE interrupt controller")
Cc: stable@vger.kernel.org # v4.12+
Signed-off-by: Paul Mackerras <paulus@ozlabs.org>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20190813100648.GE9567@blackberry
2019-08-16 14:16:59 +10:00
Paul Mackerras
8d4ba9c931 KVM: PPC: Book3S HV: Don't push XIVE context when not using XIVE device
At present, when running a guest on POWER9 using HV KVM but not using
an in-kernel interrupt controller (XICS or XIVE), for example if QEMU
is run with the kernel_irqchip=off option, the guest entry code goes
ahead and tries to load the guest context into the XIVE hardware, even
though no context has been set up.

To fix this, we check that the "CAM word" is non-zero before pushing
it to the hardware.  The CAM word is initialized to a non-zero value
in kvmppc_xive_connect_vcpu() and kvmppc_xive_native_connect_vcpu(),
and is now cleared in kvmppc_xive_{,native_}cleanup_vcpu.

Fixes: 5af5099385 ("KVM: PPC: Book3S HV: Native usage of the XIVE interrupt controller")
Cc: stable@vger.kernel.org # v4.12+
Reported-by: Cédric Le Goater <clg@kaod.org>
Signed-off-by: Paul Mackerras <paulus@ozlabs.org>
Reviewed-by: Cédric Le Goater <clg@kaod.org>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20190813100100.GC9567@blackberry
2019-08-16 14:16:08 +10:00