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1,189,500 commits

Author SHA1 Message Date
Vadim Pasternak
f8dacbf7da platform: mellanox: Introduce support for rack manager switch
The rack switch is designed to provide high bandwidth, low latency
connectivity using optical fiber as the primary interconnect.

System supports 32 OSFP ports, non-blocking switching capacity of
25.6Tbps.
System equipped with:
- 2 replaceable power supplies (AC) with 1+1 redundancy model.
- 7 replaceable fan drawers with 6+1 redundancy model.
- 2 External Root of Trust or EROT (Glacier) devices for securing
  ASICs firmware.

Signed-off-by: Vadim Pasternak <vadimp@nvidia.com>
Reviewed-by: Michael Shych <michaelsh@nvidia.com>
Link: https://lore.kernel.org/r/20230208063331.15560-2-vadimp@nvidia.com
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
2023-02-10 17:43:32 +01:00
Randy Dunlap
4a54ecf303 soc: sunxi: SUN20I_PPU should depend on PM
An $ARCH or a platform should select PM. Single device drivers
should only depend on PM, not select it.

Having SUN20I_PPU depend on PM removes a kconfig warning:

WARNING: unmet direct dependencies detected for PM
  Depends on [n]: !MMU [=y]
  Selected by [y]:
  - SUN20I_PPU [=y] && (ARCH_SUNXI || COMPILE_TEST [=y])

Fixes: 0ad2185dcb ("soc: sunxi: select CONFIG_PM")
Signed-off-by: Randy Dunlap <rdunlap@infradead.org>
Cc: Chen-Yu Tsai <wens@csie.org>
Cc: Jernej Skrabec <jernej.skrabec@gmail.com>
Cc: Samuel Holland <samuel@sholland.org>
Cc: linux-arm-kernel@lists.infradead.org
Cc: linux-sunxi@lists.linux.dev
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: Geert Uytterhoeven <geert@linux-m68k.org>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
2023-02-10 17:42:25 +01:00
Linus Torvalds
4fe3722397 sound fixes for 6.2-rc8
Hopefully the last one for 6.2, a collection of the fixes that have
 been gathered since the last PR.  All changes are small and trivial
 device-specific fixes.
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Merge tag 'sound-6.2-rc8' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound

Pull sound fixes from Takashi Iwai:
 "Hopefully the last one for 6.2, a collection of the fixes that have
  been gathered since the last pull.

  All changes are small and trivial device-specific fixes"

* tag 'sound-6.2-rc8' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound:
  ALSA: hda/realtek: Add Positivo N14KP6-TG
  ASoC: topology: Return -ENOMEM on memory allocation failure
  ALSA: emux: Avoid potential array out-of-bound in snd_emux_xg_control()
  ASoC: fsl_sai: fix getting version from VERID
  ALSA: hda/realtek: fix mute/micmute LEDs don't work for a HP platform.
  ALSA: hda/realtek: Add quirk for ASUS UM3402 using CS35L41
  ASoC: codecs: es8326: Fix DTS properties reading
  ASoC: tas5805m: add missing page switch.
  ASoC: tas5805m: rework to avoid scheduling while atomic.
  ALSA: hda/realtek: Enable mute/micmute LEDs on HP Elitebook, 645 G9
  ASoC: SOF: amd: Fix for handling spurious interrupts from DSP
  ALSA: hda/realtek: Fix the speaker output on Samsung Galaxy Book2 Pro 360
  ALSA: pci: lx6464es: fix a debug loop
  ASoC: rt715-sdca: fix clock stop prepare timeout issue
2023-02-10 08:37:48 -08:00
Thomas Weißschuh
0b8ecadc7f MAINTAINERS: dell-wmi-sysman: drop Divya Bharathi
According to the bounce sent by Dell's mailserver this user does not
exist (anymore).

Signed-off-by: Thomas Weißschuh <linux@weissschuh.net>
Link: https://lore.kernel.org/r/20230207-maintainers-dell-wmi-sysman-v1-1-6594fea12f6c@weissschuh.net
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
2023-02-10 17:25:39 +01:00
Thomas Weißschuh
ad76d9b88c x86/platform/uv: Make kobj_type structure constant
Since commit ee6d3dd4ed ("driver core: make kobj_type constant.")
the driver core allows the usage of const struct kobj_type.

Take advantage of this to constify the structure definition to prevent
modification at runtime.

Signed-off-by: Thomas Weißschuh <linux@weissschuh.net>
Reviewed-by: Justin Ernst <justin.ernst@hpe.com>
Link: https://lore.kernel.org/r/20230207-kobj_type-pdx86-v1-3-8e2c4fb83105@weissschuh.net
Reviewed-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
2023-02-10 17:24:37 +01:00
Thomas Weißschuh
881a10355f platform/x86: think-lmi: Make kobj_type structure constant
Since commit ee6d3dd4ed ("driver core: make kobj_type constant.")
the driver core allows the usage of const struct kobj_type.

Take advantage of this to constify the structure definition to prevent
modification at runtime.

Signed-off-by: Thomas Weißschuh <linux@weissschuh.net>
Reviewed-by: Mark Pearson <mpearson-lenovo@squebb.ca>
Link: https://lore.kernel.org/r/20230207-kobj_type-pdx86-v1-2-8e2c4fb83105@weissschuh.net
Reviewed-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
2023-02-10 17:24:20 +01:00
Thomas Weißschuh
438688d5ae platform/x86: dell-wmi-sysman: Make kobj_type structure constant
Since commit ee6d3dd4ed ("driver core: make kobj_type constant.")
the driver core allows the usage of const struct kobj_type.

Take advantage of this to constify the structure definition to prevent
modification at runtime.

Signed-off-by: Thomas Weißschuh <linux@weissschuh.net>
Link: https://lore.kernel.org/r/20230207-kobj_type-pdx86-v1-1-8e2c4fb83105@weissschuh.net
Reviewed-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
2023-02-10 17:24:03 +01:00
Srinivas Pandruvada
9a90ea7d37 platform/x86/intel/vsec: Use mutex for ida_alloc() and ida_free()
ID alloc and free functions don't have in built protection for parallel
invocation of ida_alloc() and ida_free(). With the current flow in the
vsec driver, there is no such scenario. But add mutex protection for
potential future changes.

Suggested-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>
Link: https://lore.kernel.org/r/20230207125821.3837799-1-srinivas.pandruvada@linux.intel.com
Reviewed-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
2023-02-10 17:21:02 +01:00
Shyam Sundar S K
be1ca8ae66 platform/x86/amd: pmc: Add line break for readability
Add a line break for the code readability.

Reviewed-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Shyam Sundar S K <Shyam-sundar.S-k@amd.com>
Link: https://lore.kernel.org/r/20230206150855.1938810-5-Shyam-sundar.S-k@amd.com
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
2023-02-10 17:16:56 +01:00
Shyam Sundar S K
1ac252a505 platform/x86/amd: pmc: differentiate STB/SMU messaging prints
Modify the dynamic debug print to differentiate between the regular
and spill to DRAM usage of the SMU message port.

Suggested-by: Sanket Goswami <Sanket.Goswami@amd.com>
Reviewed-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Shyam Sundar S K <Shyam-sundar.S-k@amd.com>
Link: https://lore.kernel.org/r/20230206150855.1938810-4-Shyam-sundar.S-k@amd.com
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
2023-02-10 17:16:54 +01:00
Shyam Sundar S K
b0d4bb9735 platform/x86/amd: pmc: Write dummy postcode into the STB DRAM
Based on the recommendation from the PMFW team in order to get the
recent telemetry data present on the STB DRAM the driver is required
to send one dummy write to the STB buffer, so it internally triggers
the PMFW to emit the latest telemetry data in the STB DRAM region.

Reviewed-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Shyam Sundar S K <Shyam-sundar.S-k@amd.com>
Link: https://lore.kernel.org/r/20230206150855.1938810-3-Shyam-sundar.S-k@amd.com
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
2023-02-10 17:16:51 +01:00
Shyam Sundar S K
1ecfd30960 platform/x86/amd: pmc: Add num_samples message id support to STB
Recent PMFWs have the support for S2D_NUM_SAMPLES message ID that
can tell the current number of samples present within the STB DRAM.

num_samples returned would let the driver know the start of the read
from the last push location. This way, the driver would emit the
top most region of the STB DRAM.

Co-developed-by: Sanket Goswami <Sanket.Goswami@amd.com>
Signed-off-by: Sanket Goswami <Sanket.Goswami@amd.com>
Signed-off-by: Shyam Sundar S K <Shyam-sundar.S-k@amd.com>
Link: https://lore.kernel.org/r/20230206150855.1938810-2-Shyam-sundar.S-k@amd.com
Reviewed-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
2023-02-10 17:16:42 +01:00
Andy Shevchenko
4ca26e565e platform/x86: Add include/linux/platform_data/x86 to MAINTAINERS
Most of the files there are being used under PDx86 subsystem or
tightly related drivers (like drivers/clk/x86/). I think it makes
sense to assure that PDx86 keeps an eye on the changes there.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Link: https://lore.kernel.org/r/20230206150202.27892-1-andriy.shevchenko@linux.intel.com
Reviewed-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
2023-02-10 17:15:31 +01:00
Andy Shevchenko
67c7debbfc platform/x86: Fix header inclusion in linux/platform_data/x86/soc.h
First of all, we don't use intel-family.h directly. On the other hand
we actively use boolean type, that is defined in the types.h (we take
top-level header for that) and x86_cpu_id, that is provided in the
mod_devicetable.h.

Secondly, we don't need to spread SOC_INTEL_IS_CPU() macro to the users.
Hence, undefine it when it's appropriate.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Link: https://lore.kernel.org/r/20230206145238.19460-1-andriy.shevchenko@linux.intel.com
Reviewed-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
2023-02-10 17:15:18 +01:00
Arnd Bergmann
b919540aeb platform/x86: int3472/discrete: add LEDS_CLASS dependency
int3472 now fails to link when the LED support is disabled:

x86_64-linux-ld: drivers/platform/x86/intel/int3472/led.o: in function `skl_int3472_register_pled':
led.c:(.text+0xf4): undefined reference to `led_classdev_register_ext'
x86_64-linux-ld: led.c:(.text+0x131): undefined reference to `led_add_lookup'
x86_64-linux-ld: drivers/platform/x86/intel/int3472/led.o: in function `skl_int3472_unregister_pled':
led.c:(.text+0x16b): undefined reference to `led_remove_lookup'
x86_64-linux-ld: led.c:(.text+0x177): undefined reference to `led_classdev_unregister'

Add an explicit Kconfig dependency.

Fixes: 5ae20a8050 ("platform/x86: int3472/discrete: Create a LED class device for the privacy LED")
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Reviewed-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Link: https://lore.kernel.org/r/20230208163658.2129009-1-arnd@kernel.org
Reviewed-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
2023-02-10 17:08:24 +01:00
Nirmoy Das
e5e43d3363 drm/i915/display: Pass drm_i915_private as param to i915 funcs
For i915 functions pass struct drm_i915_private directly instead of
struct drm_device.

v2: Use to_i915(dev) directly without alias(Andrzej).

Cc: Rodrigo Vivi <rodrigo.vivi@intel.com>
Suggested-by: Jani Nikula <jani.nikula@linux.intel.com>
Signed-off-by: Nirmoy Das <nirmoy.das@intel.com>
Reviewed-by: Jani Nikula <jani.nikula@intel.com>
Reviewed-by: Andrzej Hajda <andrzej.hajda@intel.com>
Signed-off-by: Andi Shyti <andi.shyti@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20230125095603.17845-1-nirmoy.das@intel.com
2023-02-10 16:16:21 +01:00
Shuming Fan
e093e74b81
ASoC: rt712-sdca: fix coding style and unconditionally return issues
This patch fixes
1. coding style issues
2. check if the setting was set already in rt712_sdca_mux_put callback

Signed-off-by: Shuming Fan <shumingf@realtek.com>
Link: https://lore.kernel.org/r/20230210082141.24077-1-shumingf@realtek.com
Signed-off-by: Mark Brown <broonie@kernel.org>
2023-02-10 15:08:13 +00:00
Kuninori Morimoto
1ad059a157
ASoC: rsnd: core.c: indicate warning if strange TDM width was set
Current rsnd silently uses default TDM width if it was strange
settings. It is difficult to notice about it.
This patch indicates warning for it.

Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Link: https://lore.kernel.org/r/87lel6ksqn.wl-kuninori.morimoto.gx@renesas.com
Signed-off-by: Mark Brown <broonie@kernel.org>
2023-02-10 15:08:12 +00:00
Ard Biesheuvel
45d5165426 efi: Add mixed-mode thunk recipe for GetMemoryAttributes
EFI mixed mode on x86 requires a recipe for each protocol method or
firmware service that takes u64 arguments by value, or returns pointer
or 'native int' (UINTN) values by reference (e.g,, through a void ** or
unsigned long * parameter), due to the fact that these types cannot be
translated 1:1 between the i386 and MS x64 calling conventions.

So add the missing recipe for GetMemoryAttributes, which is not actually
being used yet on x86, but the code exists and can be built for x86 so
let's make sure it works as it should.

Cc: Evgeniy Baskov <baskov@ispras.ru>
Signed-off-by: Ard Biesheuvel <ardb@kernel.org>
2023-02-10 15:20:55 +01:00
Christophe JAILLET
befb28f267 ipmi: ipmb: Fix the MODULE_PARM_DESC associated to 'retry_time_ms'
'This should be 'retry_time_ms' instead of 'max_retries'.

Fixes: 63c4eb3471 ("ipmi:ipmb: Add initial support for IPMI over IPMB")
Signed-off-by: Christophe JAILLET <christophe.jaillet@wanadoo.fr>
Message-Id: <0d8670cff2c656e99a832a249e77dc90578f67de.1675591429.git.christophe.jaillet@wanadoo.fr>
Cc: stable@vger.kernel.org
Signed-off-by: Corey Minyard <cminyard@mvista.com>
2023-02-10 07:38:18 -06:00
Corey Minyard
00bb7e763e ipmi:ssif: Add a timer between request retries
The IPMI spec has a time (T6) specified between request retries.  Add
the handling for that.

Reported by: Tony Camuso <tcamuso@redhat.com>
Cc: stable@vger.kernel.org
Signed-off-by: Corey Minyard <cminyard@mvista.com>
2023-02-10 07:38:07 -06:00
Corey Minyard
9e8b89926f ipmi:ssif: Remove rtc_us_timer
It was cruft left over from older handling of run to completion.

Cc: stable@vger.kernel.org
Signed-off-by: Corey Minyard <cminyard@mvista.com>
2023-02-10 07:37:57 -06:00
Corey Minyard
8230831c43 ipmi_ssif: Rename idle state and check
Rename the SSIF_IDLE() to IS_SSIF_IDLE(), since that is more clear, and
rename SSIF_NORMAL to SSIF_IDLE, since that's more accurate.

Cc: stable@vger.kernel.org
Signed-off-by: Corey Minyard <cminyard@mvista.com>
2023-02-10 07:37:45 -06:00
Corey Minyard
95767ed78a ipmi:ssif: resend_msg() cannot fail
The resend_msg() function cannot fail, but there was error handling
around using it.  Rework the handling of the error, and fix the out of
retries debug reporting that was wrong around this, too.

Cc: stable@vger.kernel.org
Signed-off-by: Corey Minyard <cminyard@mvista.com>
2023-02-10 07:37:23 -06:00
Jocelyn Falempe
7484a5bc15 drm/ast: Fix start address computation
During the driver conversion to shmem, the start address for the
scanout buffer was set to the base PCI address.
In most cases it works because only the lower 24bits are used, and
due to alignment it was almost always 0.
But on some unlucky hardware, it's not the case, and some uninitialized
memory is displayed on the BMC.
With shmem, the primary plane is always at offset 0 in GPU memory.

 * v2: rewrite the patch to set the offset to 0. (Thomas Zimmermann)
 * v3: move the change to plane_init() and also fix the cursor plane.
       (Jammy Huang)

Tested on a sr645 affected by this bug.

Fixes: f2fa5a99ca ("drm/ast: Convert ast to SHMEM")
Signed-off-by: Jocelyn Falempe <jfalempe@redhat.com>
Reviewed-by: Thomas Zimmermann <tzimmermann@suse.de>
Reviewed-by: Jammy Huang <jammy_huang@aspeedtech.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20230209094417.21630-1-jfalempe@redhat.com
2023-02-10 14:32:57 +01:00
Bastien Nocera
a47a3b7af7 HID: logitech-hidpp: Add more debug statements
This should help us figure out some hairy problems with some devices.

Signed-off-by: Bastien Nocera <hadess@hadess.net>
Link: https://lore.kernel.org/r/20230206221256.129198-1-hadess@hadess.net
Signed-off-by: Benjamin Tissoires <benjamin.tissoires@redhat.com>
2023-02-10 14:29:57 +01:00
Walt Holman
e8ab7a10ed HID: Add support for Logitech G923 Xbox Edition steering wheel
We get the same level of features as the regular G920.

Signed-off-by: Walt Holman <waltholman09@gmail.com>
Link: https://lore.kernel.org/r/20230207195051.16373-1-waltholman09@gmail.com
Signed-off-by: Benjamin Tissoires <benjamin.tissoires@redhat.com>
2023-02-10 14:29:51 +01:00
Bastien Nocera
3ab1c27f92 HID: logitech-hidpp: Add Signature M650
Add support for HID++ over Bluetooth for the Logitech Signature
M650 mouse. It comes with a dongle but can also be used over Bluetooth
without one.

Signed-off-by: Bastien Nocera <hadess@hadess.net>
Link: https://lore.kernel.org/r/20220404100311.3304-1-hadess@hadess.net
Signed-off-by: Benjamin Tissoires <benjamin.tissoires@redhat.com>
2023-02-10 14:29:50 +01:00
Bastien Nocera
d83956c885 HID: logitech-hidpp: Remove HIDPP_QUIRK_NO_HIDINPUT quirk
HIDPP_QUIRK_NO_HIDINPUT isn't used by any devices but still happens to
work as HIDPP_QUIRK_DELAYED_INIT is defined to the same value. Remove
HIDPP_QUIRK_NO_HIDINPUT and use HIDPP_QUIRK_DELAYED_INIT everywhere
instead.

Tested on a T650 which requires that quirk, and a number of unifying and
Bluetooth devices that don't.

Signed-off-by: Bastien Nocera <hadess@hadess.net>
Link: https://lore.kernel.org/r/20230125121723.3122-2-hadess@hadess.net
Signed-off-by: Benjamin Tissoires <benjamin.tissoires@redhat.com>
2023-02-10 14:29:50 +01:00
Bastien Nocera
498ba20690 HID: logitech-hidpp: Don't restart communication if not necessary
Don't stop and restart communication with the device unless we need to
modify the connect flags used because of a device quirk.

Signed-off-by: Bastien Nocera <hadess@hadess.net>
Link: https://lore.kernel.org/r/20230125121723.3122-1-hadess@hadess.net
Signed-off-by: Benjamin Tissoires <benjamin.tissoires@redhat.com>
2023-02-10 14:29:50 +01:00
Bastien Nocera
43551d9bea HID: logitech-hidpp: Add constants for HID++ 2.0 error codes
Add constants for HID++ 2.0 error codes listed in "Protocol HID++2.0
essential features" chapter, page 3, in
logitech_hidpp_2.0_specification_draft_2012-06-04.pdf

Signed-off-by: Bastien Nocera <hadess@hadess.net>
Link: https://lore.kernel.org/r/20221207100033.64095-1-hadess@hadess.net
Signed-off-by: Benjamin Tissoires <benjamin.tissoires@redhat.com>
2023-02-10 14:29:50 +01:00
Bastien Nocera
cae253d603 Revert "HID: logitech-hidpp: add a module parameter to keep firmware gestures"
Now that we're in 2022, and the majority of desktop environments can and
should support touchpad gestures through libinput, remove the legacy
module parameter that made it possible to use gestures implemented in
firmware.

This will eventually allow simplifying the driver's initialisation code.

This reverts commit 9188dbaed6.

Signed-off-by: Bastien Nocera <hadess@hadess.net>
Signed-off-by: Benjamin Tissoires <benjamin.tissoires@redhat.com>
Link: https://lore.kernel.org/r/20221220154345.474596-1-hadess@hadess.net
2023-02-10 14:29:50 +01:00
Bastien Nocera
719acb4d3b HID: logitech-hidpp: Hard-code HID++ 1.0 fast scroll support
HID++ 1.0 devices only export whether Fast Scrolling is enabled, not
whether they are capable of it. Reinstate the original quirks for the 3
supported mice so fast scrolling works again on those devices.

Fixes: 908d325e16 ("HID: logitech-hidpp: Detect hi-res scrolling support")
Link: https://bugzilla.kernel.org/show_bug.cgi?id=216903
Signed-off-by: Bastien Nocera <hadess@hadess.net>
Signed-off-by: Benjamin Tissoires <benjamin.tissoires@redhat.com>
Link: https://lore.kernel.org/r/20230116130937.391441-1-hadess@hadess.net
2023-02-10 14:29:21 +01:00
Arnd Bergmann
d339b2e6b1 arm64: reorder defconfig
Some Kconfig options has moved around after a 'make savedefconfig' run,
so move them to their new location to make it easier to see what other
options got removed.

Signed-off-by: Arnd Bergmann <arnd@arndb.de>
2023-02-10 14:26:14 +01:00
Tom Lendacky
493a2c2d23 Documentation/hw-vuln: Add documentation for Cross-Thread Return Predictions
Add the admin guide for the Cross-Thread Return Predictions vulnerability.

Signed-off-by: Tom Lendacky <thomas.lendacky@amd.com>
Message-Id: <60f9c0b4396956ce70499ae180cb548720b25c7e.1675956146.git.thomas.lendacky@amd.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2023-02-10 07:27:37 -05:00
Tom Lendacky
6f0f2d5ef8 KVM: x86: Mitigate the cross-thread return address predictions bug
By default, KVM/SVM will intercept attempts by the guest to transition
out of C0. However, the KVM_CAP_X86_DISABLE_EXITS capability can be used
by a VMM to change this behavior. To mitigate the cross-thread return
address predictions bug (X86_BUG_SMT_RSB), a VMM must not be allowed to
override the default behavior to intercept C0 transitions.

Use a module parameter to control the mitigation on processors that are
vulnerable to X86_BUG_SMT_RSB. If the processor is vulnerable to the
X86_BUG_SMT_RSB bug and the module parameter is set to mitigate the bug,
KVM will not allow the disabling of the HLT, MWAIT and CSTATE exits.

Signed-off-by: Tom Lendacky <thomas.lendacky@amd.com>
Message-Id: <4019348b5e07148eb4d593380a5f6713b93c9a16.1675956146.git.thomas.lendacky@amd.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2023-02-10 07:27:37 -05:00
Asahi Lina
aa8c85affe
drm/shmem-helper: Fix locking for drm_gem_shmem_get_pages_sgt()
Other functions touching shmem->sgt take the pages lock, so do that here
too. drm_gem_shmem_get_pages() & co take the same lock, so move to the
_locked() variants to avoid recursive locking.

Discovered while auditing locking to write the Rust abstractions.

Fixes: 2194a63a81 ("drm: Add library for shmem backed GEM objects")
Fixes: 4fa3d66f13 ("drm/shmem: Do dma_unmap_sg before purging pages")
Signed-off-by: Asahi Lina <lina@asahilina.net>
Reviewed-by: Javier Martinez Canillas <javierm@redhat.com>
Signed-off-by: Javier Martinez Canillas <javierm@redhat.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20230205125124.2260-1-lina@asahilina.net
2023-02-10 13:13:44 +01:00
Tom Lendacky
be8de49bea x86/speculation: Identify processors vulnerable to SMT RSB predictions
Certain AMD processors are vulnerable to a cross-thread return address
predictions bug. When running in SMT mode and one of the sibling threads
transitions out of C0 state, the other sibling thread could use return
target predictions from the sibling thread that transitioned out of C0.

The Spectre v2 mitigations cover the Linux kernel, as it fills the RSB
when context switching to the idle thread. However, KVM allows a VMM to
prevent exiting guest mode when transitioning out of C0. A guest could
act maliciously in this situation, so create a new x86 BUG that can be
used to detect if the processor is vulnerable.

Reviewed-by: Borislav Petkov (AMD) <bp@alien8.de>
Signed-off-by: Tom Lendacky <thomas.lendacky@amd.com>
Message-Id: <91cec885656ca1fcd4f0185ce403a53dd9edecb7.1675956146.git.thomas.lendacky@amd.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2023-02-10 06:43:03 -05:00
Maíra Canal
7c18189b14
drm/vgem: add missing mutex_destroy
vgem_fence_open() instantiates a mutex for a particular fence
instance, but never destroys it by calling mutex_destroy() in
vgem_fence_close().

So, add the missing mutex_destroy() to guarantee proper resource
destruction.

Fixes: 4077798484 ("drm/vgem: Attach sw fences to exported vGEM dma-buf (ioctl)")
Signed-off-by: Maíra Canal <mcanal@igalia.com>
Reviewed-by: Stanislaw Gruszka <stanislaw.gruszka@linux.intel.com>
Signed-off-by: Maíra Canal <mairacanal@riseup.net>
Link: https://patchwork.freedesktop.org/patch/msgid/20230202125517.427976-1-mcanal@igalia.com
2023-02-10 08:21:04 -03:00
Rohan McLure
4f8e09106f powerpc/kcsan: Prevent recursive instrumentation with IRQ save/restores
Instrumented memory accesses provided by KCSAN will access core-local
memories (which will save and restore IRQs) as well as restoring IRQs
directly. Avoid recursive instrumentation by applying __no_kcsan
annotation to IRQ restore routines.

Signed-off-by: Rohan McLure <rmclure@linux.ibm.com>
[mpe: Resolve merge conflict with IRQ replay recursion changes]
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20230206021801.105268-5-rmclure@linux.ibm.com
2023-02-10 22:19:56 +11:00
Rohan McLure
b6e259297a powerpc/kcsan: Memory barriers semantics
Annotate memory barriers *mb() with calls to kcsan_mb(), signaling to
compilers supporting KCSAN that the respective memory barrier has been
issued. Rename memory barrier *mb() to __*mb() to opt in for
asm-generic/barrier.h to generate the respective *mb() macro.

Signed-off-by: Rohan McLure <rmclure@linux.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20230206021801.105268-4-rmclure@linux.ibm.com
2023-02-10 22:19:56 +11:00
Rohan McLure
2a7ce82dc4 powerpc/kcsan: Exclude udelay to prevent recursive instrumentation
In order for KCSAN to increase its likelihood of observing a data race,
it sets a watchpoint on memory accesses and stalls, allowing for
detection of conflicting accesses by other kernel threads or interrupts.

Stalls are implemented by injecting a call to udelay in instrumented code.
To prevent recursive instrumentation, exclude udelay from being instrumented.

Signed-off-by: Rohan McLure <rmclure@linux.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20230206021801.105268-3-rmclure@linux.ibm.com
2023-02-10 22:19:56 +11:00
Rohan McLure
2fb857bc9f powerpc/kcsan: Add exclusions from instrumentation
Exclude various incompatible compilation units from KCSAN
instrumentation.

Signed-off-by: Rohan McLure <rmclure@linux.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20230206021801.105268-2-rmclure@linux.ibm.com
2023-02-10 22:19:56 +11:00
Nicholas Piggin
1ee4e35076 powerpc: Skip stack validation checking alternate stacks if they are not allocated
Stack validation in early boot can just bail out of checking alternate
stacks if they are not validated yet. Checking against a NULL stack
could cause NULLish pointer values to be considered valid.

Signed-off-by: Nicholas Piggin <npiggin@gmail.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20221216115930.2667772-5-npiggin@gmail.com
2023-02-10 22:19:56 +11:00
Nicholas Piggin
dc222fa773 powerpc/64: Move paca allocation to early_setup()
The early paca and boot cpuid dance is complicated and currently does
not quite work as expected for boot cpuid != 0 cases.

early_init_devtree() currently allocates the paca_ptrs and boot cpuid
paca, but until that returns and early_setup() calls setup_paca(), this
thread is currently still executing with smp_processor_id() == 0.

One problem this causes is the paca_ptrs[smp_processor_id()] pointer is
poisoned, so valid_emergency_stack() (any backtrace) and any similar
users will crash.

Another is that the hardware id which is set here will not be returned
by get_hard_smp_processor_id(smp_processor_id()), but it would work
correctly for boot_cpuid == 0, which could lead to difficult to
reproduce or find bugs. The hard id does not seem to be used by the rest
of early_init_devtree(), it just looks like all this code might have
been put here to allocate somewhere to store boot CPU hardware id while
scanning the devtree.

Rearrange things so the hwid is put in a global variable like
boot_cpuid, and do all the paca allocation and boot paca setup in the
64-bit early_setup() after we have everything ready to go.

The paca_ptrs[0] re-poisoning code in early_setup does not seem to have
ever worked, because paca_ptrs[0] was never not-poisoned when boot_cpuid
is not 0.

Signed-off-by: Nicholas Piggin <npiggin@gmail.com>
[mpe: Fix build error on 32-bit]
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20221216115930.2667772-4-npiggin@gmail.com
2023-02-10 22:19:56 +11:00
Nicholas Piggin
9fa24404f5 powerpc/64: Fix task_cpu in early boot when booting non-zero cpuid
powerpc/64 can boot on a non-zero SMP processor id. Initially, the boot
CPU is said to be "assumed to be 0" until early_init_devtree() discovers
the id from the device tree. That is not a good description because the
assumption can be wrong and that has to be handled, the better
description is that 0 is used as a placeholder, and things are fixed
after the real id is discovered.

smp_processor_id() is set to the boot cpuid, but task_cpu(current) is
not, which causes the smp_processor_id() == task_cpu(current) invariant
to be broken until init_idle() in sched_init().

This is quite fragile and could lead to subtle bugs in future. One bug
is that validate_sp_size uses task_cpu() to get the process stack, so
any stack trace from the booting CPU between early_init_devtree()
and sched_init() will have problems. Early on paca_ptrs[0] will be
poisoned, so that can cause machine checks dereferencing that memory
in real mode. Later, validating the current stack pointer against the
idle task of a different secondary will probably cause no stack trace
to be printed.

Fix this by setting thread_info->cpu right after smp_processor_id() is
set to the boot cpuid.

Signed-off-by: Nicholas Piggin <npiggin@gmail.com>
[mpe: Fix SMP=n build as reported by sfr]
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20221216115930.2667772-3-npiggin@gmail.com
2023-02-10 22:19:38 +11:00
Christian König
96a7b60f6d drm: remove dumb_destroy callback
Not used by any driver any more.

Signed-off-by: Christian König <christian.koenig@amd.com>
Reviewed-by: Thomas Zimmermann <tzimmermann@suse.de>
Tested-by: Thomas Zimmermann <tzimmermann@suse.de>
Link: https://patchwork.freedesktop.org/patch/msgid/20230126102814.8722-2-christian.koenig@amd.com
2023-02-10 12:19:27 +01:00
Nicholas Piggin
dea18da459 powerpc/64s: Fix stress_hpt memblock alloc alignment
The stress_hpt memblock allocation did not pass in an alignment,
which causes a stack dump in early boot (that I missed, oops).

Fixes: 6b34a099fa ("powerpc/64s/hash: add stress_hpt kernel boot option to increase hash faults")
Signed-off-by: Nicholas Piggin <npiggin@gmail.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20221216115930.2667772-2-npiggin@gmail.com
2023-02-10 22:17:36 +11:00
Nicholas Piggin
ffc8e90dec powerpc/64e: Simplify address calculation in secondary hold loop
As the earlier comment explains, __secondary_hold_spinloop does not have
to be accessed at its virtual address, slightly simplifying code.

Signed-off-by: Nicholas Piggin <npiggin@gmail.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20230203113858.1152093-4-npiggin@gmail.com
2023-02-10 22:17:36 +11:00
Nicholas Piggin
58f24eea52 powerpc/64s: Refactor initialisation after prom
Move some basic Book3S initialisation after prom to a function similar
to what Book3E looks like. Book3E returns from this function at the
virtual address mapping, and Book3S will do the same in a later change,
so making them look similar helps with that.

Signed-off-by: Nicholas Piggin <npiggin@gmail.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20230203113858.1152093-3-npiggin@gmail.com
2023-02-10 22:17:36 +11:00