Implement fbdev emulation with fbdev-dma. Fbdev-dma now supports
damage handling, which is required by ingenic. Avoids the overhead of
fbdev-generic's additional shadow buffering. No functional changes.
Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de>
Cc: Paul Cercueil <paul@crapouillou.net>
Acked-by: Paul Cercueil <paul@crapouillou.net>
Link: https://patchwork.freedesktop.org/patch/msgid/20240419083331.7761-26-tzimmermann@suse.de
Implement fbdev emulation with fbdev-dma. Fbdev-dma now supports
damage handling, which is required by lcdc. Avoids the overhead of
fbdev-generic's additional shadow buffering. No functional changes.
Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de>
Cc: Shawn Guo <shawnguo@kernel.org>
Cc: Sascha Hauer <s.hauer@pengutronix.de>
Cc: Pengutronix Kernel Team <kernel@pengutronix.de>
Cc: Fabio Estevam <festevam@gmail.com>
Cc: NXP Linux Team <linux-imx@nxp.com>
Reviewed-by: Javier Martinez Canillas <javierm@redhat.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20240419083331.7761-25-tzimmermann@suse.de
Implement fbdev emulation with fbdev-dma. Fbdev-dma now supports
damage handling, which is required by kirin. Avoids the overhead of
fbdev-generic's additional shadow buffering. No functional changes.
Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de>
Cc: Xinliang Liu <xinliang.liu@linaro.org>
Cc: Tian Tao <tiantao6@hisilicon.com>
Cc: Xinwei Kong <kong.kongxinwei@hisilicon.com>
Cc: Sumit Semwal <sumit.semwal@linaro.org>
Cc: Yongqin Liu <yongqin.liu@linaro.org>
Cc: John Stultz <jstultz@google.com>
Reviewed-by: Javier Martinez Canillas <javierm@redhat.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20240419083331.7761-24-tzimmermann@suse.de
Implement fbdev emulation with fbdev-dma. Fbdev-dma now supports
damage handling, which is required by komeda. Avoids the overhead of
fbdev-generic's additional shadow buffering. No functional changes.
Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de>
Cc: Liviu Dudau <liviu.dudau@arm.com>
Acked-by: Liviu Dudau <liviu.dudau@arm.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20240419083331.7761-23-tzimmermann@suse.de
Add support for damage handling and deferred I/O to fbdev-dma. This
enables fbdev-dma to support all DMA-memory-based DRM drivers, even
such with a dirty callback in their framebuffers.
The patch adds the code for deferred I/O and also sets a dedicated
helper for struct fb_ops.fb_mmap that support coherent mappings.
v3:
- init fb_ops with FB_GEN_DEFAULT_DEFERRED_DMAMEM_OPS() (Javier)
Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de>
Reviewed-by: Javier Martinez Canillas <javierm@redhat.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20240419083331.7761-22-tzimmermann@suse.de
Implement fbdev emulation with fbdev-shmem. Avoids the overhead of
fbdev-generic's additional shadow buffering. No functional changes.
Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de>
Cc: Dave Airlie <airlied@redhat.com>
Cc: Sean Paul <sean@poorly.run>
Cc: Thomas Zimmermann <tzimmermann@suse.de>
Reviewed-by: Javier Martinez Canillas <javierm@redhat.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20240419083331.7761-19-tzimmermann@suse.de
Implement fbdev emulation with fbdev-shmem. Avoids the overhead of
fbdev-generic's additional shadow buffering. No functional changes.
Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de>
Cc: Thomas Zimmermann <tzimmermann@suse.de>
Cc: Javier Martinez Canillas <javierm@redhat.com>
Reviewed-by: Javier Martinez Canillas <javierm@redhat.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20240419083331.7761-18-tzimmermann@suse.de
Implement fbdev emulation with fbdev-shmem. Avoids the overhead of
fbdev-generic's additional shadow buffering. No functional changes.
Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de>
Cc: Thomas Zimmermann <tzimmermann@suse.de>
Cc: Javier Martinez Canillas <javierm@redhat.com>
Reviewed-by: Javier Martinez Canillas <javierm@redhat.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20240419083331.7761-17-tzimmermann@suse.de
Implement fbdev emulation with fbdev-shmem. Avoids the overhead of
fbdev-generic's additional shadow buffering. No functional changes.
Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de>
Cc: Hans de Goede <hdegoede@redhat.com>
Reviewed-by: Hans de Goede <hdegoede@redhat.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20240419083331.7761-16-tzimmermann@suse.de
Implement fbdev emulation with fbdev-shmem. Avoids the overhead of
fbdev-generic's additional shadow buffering. No functional changes.
Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de>
Cc: Javier Martinez Canillas <javierm@redhat.com>
Reviewed-by: Javier Martinez Canillas <javierm@redhat.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20240419083331.7761-14-tzimmermann@suse.de
Add an fbdev emulation for SHMEM-based memory managers. The code is
similar to fbdev-generic, but does not require an additional shadow
buffer for mmap(). Fbdev-shmem operates directly on the buffer object's
SHMEM pages. Fbdev's deferred-I/O mechanism updates the hardware state
on write operations.
The memory pages of GEM SHMEM cannot be detected by fbdefio. Therefore
fbdev-shmem implements the .get_page() hook in struct fb_deferred_io.
The fbdefio helpers call this hook to retrieve the page directly from
fbdev-shmem instead of trying to detect it internally.
v3:
- clarify on get_page mechanism in commit description (Javier)
v2:
- use drm_driver_legacy_fb_format() (Geert)
Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de>
Reviewed-by: Javier Martinez Canillas <javierm@redhat.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20240419083331.7761-9-tzimmermann@suse.de
Add a callback for drivers to provide framebuffer pages to fbdev's
deferred-I/O helpers. Implementations need to acquire a reference on
the page before returning it. Returning NULL generates a SIGBUS
signal.
This will be useful for DRM's fbdev emulation with GEM-shmem buffer
objects.
v2:
- fix typo in commit message (Javier)
Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de>
Reviewed-by: Javier Martinez Canillas <javierm@redhat.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20240419083331.7761-8-tzimmermann@suse.de
Unconditionally call get_page() after looking up a page from the
framebuffer memory. Guarantees that we always hold a reference.
This change also refactors the code such that it can support a
driver-supplied get_page helper. This will be useful for DRM's
fbdev emulation.
Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de>
Reviewed-by: Javier Martinez Canillas <javierm@redhat.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20240419083331.7761-7-tzimmermann@suse.de
Clean up the pageref state as part of the lastclose helper. This
only requires to clear the page's mapping field. The pageref and
page can stay in place for the next opened instance of the frame-
buffer file.
With the change in the clean-up logic, there's no further need
to look up pages during the lastclose cleanup. The code instead
uses the existing pagerefs in its look-up table. It also avoids
using smem_len, which some driver might not set correctly.
v2:
- fix typos in commit message (Javier)
Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de>
Reviewed-by: Javier Martinez Canillas <javierm@redhat.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20240419083331.7761-4-tzimmermann@suse.de
Set up struct fb_deferred_io_pageref in the new helper function
fb_deferred_io_pageref_lookup(), which runs when the pageref is first
taken. Remove the setup code from the rest of the code.
At first, the code allocates the memory of all pageref structs. The
setup of the various fields happens when the pageref is required.
v2:
- fix typo in commit message (Javier)
Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de>
Reviewed-by: Javier Martinez Canillas <javierm@redhat.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20240419083331.7761-3-tzimmermann@suse.de
Framebuffer memory is allocated via vzalloc() from non-contiguous
physical pages. The physical framebuffer start address is therefore
meaningless. Do not set it.
The value is not used within the kernel and only exported to userspace
on dedicated ARM configs. No functional change is expected.
v2:
- refer to vzalloc() in commit message (Javier)
Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de>
Fixes: a5b44c4adb ("drm/fbdev-generic: Always use shadow buffering")
Cc: Thomas Zimmermann <tzimmermann@suse.de>
Cc: Javier Martinez Canillas <javierm@redhat.com>
Cc: Zack Rusin <zackr@vmware.com>
Cc: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Cc: Maxime Ripard <mripard@kernel.org>
Cc: <stable@vger.kernel.org> # v6.4+
Reviewed-by: Javier Martinez Canillas <javierm@redhat.com>
Reviewed-by: Zack Rusin <zack.rusin@broadcom.com>
Reviewed-by: Sui Jingfeng <sui.jingfeng@linux.dev>
Tested-by: Sui Jingfeng <sui.jingfeng@linux.dev>
Acked-by: Maxime Ripard <mripard@kernel.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20240419083331.7761-2-tzimmermann@suse.de
Having conditional around the of_node pointer of the drm_bridge structure
is not necessary anymore, since drm_bridge structure always has the of_node
member since the commit d8dfccde27 ("drm/bridge: Drop conditionals around
of_node pointers").
So drop the conditional, please also note that this patch is following the
convention used by driver core, see commit c9e358dfc4 ("driver-core:
remove conditionals around devicetree pointers").
Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Signed-off-by: Sui Jingfeng <sui.jingfeng@linux.dev>
Reviewed-by: Douglas Anderson <dianders@chromium.org>
Signed-off-by: Douglas Anderson <dianders@chromium.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20240501051323.805076-1-sui.jingfeng@linux.dev
plane->state and plane->state->fb can be NULL, so add a check before
dereferencing them.
Found by testing with the imx driver.
Fixes: 879b3b6511 ("drm/fb_dma: Add generic get_scanout_buffer() for drm_panic")
Signed-off-by: Jocelyn Falempe <jfalempe@redhat.com>
Reviewed-by: Thomas Zimmermann <tzimmermann@suse.de>
Link: https://patchwork.freedesktop.org/patch/msgid/20240426121121.241366-1-jfalempe@redhat.com
UAPI Changes:
- drm/i915/guc: Use context hints for GT frequency
Allow user to provide a low latency context hint. When set, KMD
sends a hint to GuC which results in special handling for this
context. SLPC will ramp the GT frequency aggressively every time
it switches to this context. The down freq threshold will also be
lower so GuC will ramp down the GT freq for this context more slowly.
We also disable waitboost for this context as that will interfere with
the strategy.
We need to enable the use of SLPC Compute strategy during init, but
it will apply only to contexts that set this bit during context
creation.
Userland can check whether this feature is supported using a new param-
I915_PARAM_HAS_CONTEXT_FREQ_HINT. This flag is true for all guc submission
enabled platforms as they use SLPC for frequency management.
The Mesa usage model for this flag is here -
https://gitlab.freedesktop.org/sushmave/mesa/-/commits/compute_hint
- drm/i915/gt: Enable only one CCS for compute workload
Enable only one CCS engine by default with all the compute sices
allocated to it.
While generating the list of UABI engines to be exposed to the
user, exclude any additional CCS engines beyond the first
instance
***
NOTE: This W/A will make all DG2 SKUs appear like single CCS SKUs by
default to mitigate a hardware bug. All the EUs will still remain
usable, and all the userspace drivers have been confirmed to be able
to dynamically detect the change in number of CCS engines and adjust.
For the smaller percent of applications that get perf benefit from
letting the userspace driver dispatch across all 4 CCS engines we will
be introducing a sysfs control as a later patch to choose 4 CCS each
with 25% EUs (or 50% if 2 CCS).
NOTE: A regression has been reported at
https://gitlab.freedesktop.org/drm/i915/kernel/-/issues/10895
However Andi has been triaging the issue and we're closing in a fix
to the gap in the W/A implementation:
https://lists.freedesktop.org/archives/intel-gfx/2024-April/348747.html
Driver Changes:
- Add new and fix to existing workarounds: Wa_14018575942 (MTL),
Wa_16019325821 (Gen12.70), Wa_14019159160 (MTL), Wa_16015675438,
Wa_14020495402 (Gen12.70) (Tejas, John, Lucas)
- Fix UAF on destroy against retire race and remove two earlier
partial fixes (Janusz)
- Limit the reserved VM space to only the platforms that need it (Andi)
- Reset queue_priority_hint on parking for execlist platforms (Chris)
- Fix gt reset with GuC submission is disabled (Nirmoy)
- Correct capture of EIR register on hang (John)
- Remove usage of the deprecated ida_simple_xx() API
- Refactor confusing __intel_gt_reset() (Nirmoy)
- Fix the fix for GuC reset lock confusion (John)
- Simplify/extend platform check for Wa_14018913170 (John)
- Replace dev_priv with i915 (Andi)
- Add and use gt_to_guc() wrapper (Andi)
- Remove bogus null check (Rodrigo, Dan)
. Selftest improvements (Janusz, Nirmoy, Daniele)
Signed-off-by: Dave Airlie <airlied@redhat.com>
From: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/ZitVBTvZmityDi7D@jlahtine-mobl.ger.corp.intel.com
-----BEGIN PGP SIGNATURE-----
iQFSBAABCAA8FiEEq68RxlopcLEwq+PEeb4+QwBBGIYFAmYutdweHHRvcnZhbGRz
QGxpbnV4LWZvdW5kYXRpb24ub3JnAAoJEHm+PkMAQRiGG5oH/3Ggwz5N+gdEK3np
qxUfpgJTWo+fJ6xhRLGy84TnEZ9s9UnK0Su6UuVyOb0F/2Y8hesJ6iwB16yQFKNe
Nore/VvuBZ+utshz5N20yNyPugNOP74GGbyOm+d+iJwIKnmSE8jSjWyMwNFHJCZM
BfoBxZrpwU/YD/0PD1KkI44jhPX1H/EcEmtNiklLnuYvJydTWiRFeku+CSgcOiRz
6fIFrcZMREZrAytMQSwteBAvI3vWblC0S39ZgJmtZt+oi+s1ksIUNG8Mm5uMAiyF
LcGep2tWV06x9uB9XVvrk0qco/kOaUgYuQrHQwNu9LzsaUdYGKqBBMk41SoNXFkB
hBXN26U=
=N2E2
-----END PGP SIGNATURE-----
Merge v6.9-rc6 into drm-next
Thomas needs the defio fixes, Maíra needs the vkms fixes and Joonas
has some fun with i915-gem conflicts.
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
After IGT migrating to dynamic sub-tests, the pipe prefixes
in the expected fails list are incorrect. Lets drop those
to accurately match the expected fails.
In addition, update the xfails list to match the current passing
list. This should have ideally failed in the CI run because some
tests were marked as fail even though they passed but due to the
mismatch in test names, the matching didn't correctly work and was
resulting in those failures not being seen.
Here is the passing pipeline for apq8016 with this change:
https://gitlab.freedesktop.org/drm/msm/-/jobs/57050562
Signed-off-by: Abhinav Kumar <quic_abhinavk@quicinc.com>
Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Acked-by: Helen Koike <helen.koike@collabora.com>
Signed-off-by: Helen Koike <helen.koike@collabora.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20240401204859.24223-1-quic_abhinavk@quicinc.com
This reverts commit 8a91b29f1f.
The regulator_disable() added by the original commit solves one kind of
regulator imbalance but adds another one as it allows the regulator to be
disabled one more time than it is enabled in the following scenario:
1. Start video pipeline -> sn65dsi83_atomic_pre_enable -> regulator_enable
2. PLL lock fails -> regulator_disable
3. Stop video pipeline -> sn65dsi83_atomic_disable -> regulator_disable
The reason is clear from the code flow, which looks like this (after
removing unrelated code):
static void sn65dsi83_atomic_pre_enable()
{
regulator_enable(ctx->vcc);
if (PLL failed locking) {
regulator_disable(ctx->vcc); <---- added by patch being reverted
return;
}
}
static void sn65dsi83_atomic_disable()
{
regulator_disable(ctx->vcc);
}
The use case for introducing the additional regulator_disable() was
removing the module for debugging (see link below for the discussion). If
the module is removed after a .atomic_pre_enable, i.e. with an active
pipeline from the DRM point of view, .atomic_disable is not called and thus
the regulator would not be disabled.
According to the discussion however there is no actual use case for
removing the module with an active pipeline, except for
debugging/development.
On the other hand, the occurrence of a PLL lock failure is possible due to
any physical reason (e.g. a temporary hardware failure for electrical
reasons) so handling it gracefully should be supported. As there is no way
for .atomic[_pre]_enable to report an error to the core, the only clean way
to support it is calling regulator_disabled() only in .atomic_disable,
unconditionally, as it was before.
Link: https://lore.kernel.org/all/15244220.uLZWGnKmhe@steina-w/
Fixes: 8a91b29f1f ("drm/bridge: ti-sn65dsi83: Fix enable error path")
Reviewed-by: Alexander Stein <alexander.stein@ew.tq-group.com>
Signed-off-by: Luca Ceresoli <luca.ceresoli@bootlin.com>
Signed-off-by: Robert Foss <rfoss@kernel.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20240426122259.46808-1-luca.ceresoli@bootlin.com
- Fix EEVDF corner cases
- Fix two nohz_full= related bugs that can cause boot crashes
and warnings.
Signed-off-by: Ingo Molnar <mingo@kernel.org>
-----BEGIN PGP SIGNATURE-----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=Zhc/
-----END PGP SIGNATURE-----
Merge tag 'sched-urgent-2024-04-28' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull scheduler fixes from Ingo Molnar:
- Fix EEVDF corner cases
- Fix two nohz_full= related bugs that can cause boot crashes
and warnings
* tag 'sched-urgent-2024-04-28' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
sched/isolation: Fix boot crash when maxcpus < first housekeeping CPU
sched/isolation: Prevent boot crash when the boot CPU is nohz_full
sched/eevdf: Prevent vlag from going out of bounds in reweight_eevdf()
sched/eevdf: Fix miscalculation in reweight_entity() when se is not curr
sched/eevdf: Always update V if se->on_rq when reweighting
- Make the CPU_MITIGATIONS=n interaction with conflicting
mitigation-enabling boot parameters a bit saner.
- Re-enable CPU mitigations by default on non-x86
- Fix TDX shared bit propagation on mprotect()
- Fix potential show_regs() system hang when PKE
initialization is not fully finished yet.
- Add the 0x10-0x1f model IDs to the Zen5 range
- Harden #VC instruction emulation some more
Signed-off-by: Ingo Molnar <mingo@kernel.org>
-----BEGIN PGP SIGNATURE-----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=AfRR
-----END PGP SIGNATURE-----
Merge tag 'x86-urgent-2024-04-28' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull x86 fixes from Ingo Molnar:
- Make the CPU_MITIGATIONS=n interaction with conflicting
mitigation-enabling boot parameters a bit saner.
- Re-enable CPU mitigations by default on non-x86
- Fix TDX shared bit propagation on mprotect()
- Fix potential show_regs() system hang when PKE initialization
is not fully finished yet.
- Add the 0x10-0x1f model IDs to the Zen5 range
- Harden #VC instruction emulation some more
* tag 'x86-urgent-2024-04-28' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
cpu: Ignore "mitigations" kernel parameter if CPU_MITIGATIONS=n
cpu: Re-enable CPU mitigations by default for !X86 architectures
x86/tdx: Preserve shared bit on mprotect()
x86/cpu: Fix check for RDPKRU in __show_regs()
x86/CPU/AMD: Add models 0x10-0x1f to the Zen5 range
x86/sev: Check for MWAITX and MONITORX opcodes in the #VC handler
housekeeping_setup() checks cpumask_intersects(present, online) to ensure
that the kernel will have at least one housekeeping CPU after smp_init(),
but this doesn't work if the maxcpus= kernel parameter limits the number of
processors available after bootup.
For example, a kernel with "maxcpus=2 nohz_full=0-2" parameters crashes at
boot time on a virtual machine with 4 CPUs.
Change housekeeping_setup() to use cpumask_first_and() and check that the
returned CPU number is valid and less than setup_max_cpus.
Another corner case is "nohz_full=0" on a machine with a single CPU or with
the maxcpus=1 kernel argument. In this case non_housekeeping_mask is empty
and tick_nohz_full_setup() makes no sense. And indeed, the kernel hits the
WARN_ON(tick_nohz_full_running) in tick_sched_do_timer().
And how should the kernel interpret the "nohz_full=" parameter? It should
be silently ignored, but currently cpulist_parse() happily returns the
empty cpumask and this leads to the same problem.
Change housekeeping_setup() to check cpumask_empty(non_housekeeping_mask)
and do nothing in this case.
Signed-off-by: Oleg Nesterov <oleg@redhat.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Reviewed-by: Phil Auld <pauld@redhat.com>
Acked-by: Frederic Weisbecker <frederic@kernel.org>
Link: https://lore.kernel.org/r/20240413141746.GA10008@redhat.com
Documentation/timers/no_hz.rst states that the "nohz_full=" mask must not
include the boot CPU, which is no longer true after:
08ae95f4fd ("nohz_full: Allow the boot CPU to be nohz_full").
However after:
aae17ebb53 ("workqueue: Avoid using isolated cpus' timers on queue_delayed_work")
the kernel will crash at boot time in this case; housekeeping_any_cpu()
returns an invalid CPU number until smp_init() brings the first
housekeeping CPU up.
Change housekeeping_any_cpu() to check the result of cpumask_any_and() and
return smp_processor_id() in this case.
This is just the simple and backportable workaround which fixes the
symptom, but smp_processor_id() at boot time should be safe at least for
type == HK_TYPE_TIMER, this more or less matches the tick_do_timer_boot_cpu
logic.
There is no worry about cpu_down(); tick_nohz_cpu_down() will not allow to
offline tick_do_timer_cpu (the 1st online housekeeping CPU).
Fixes: aae17ebb53 ("workqueue: Avoid using isolated cpus' timers on queue_delayed_work")
Reported-by: Chris von Recklinghausen <crecklin@redhat.com>
Signed-off-by: Oleg Nesterov <oleg@redhat.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Reviewed-by: Phil Auld <pauld@redhat.com>
Acked-by: Frederic Weisbecker <frederic@kernel.org>
Link: https://lore.kernel.org/r/20240411143905.GA19288@redhat.com
Closes: https://lore.kernel.org/all/20240402105847.GA24832@redhat.com/
- Soundness: make internal functions generated by the 'module!' macro
inaccessible, do not implement 'Zeroable' for 'Infallible' and
require 'Send' for the 'Module' trait.
- Build: avoid errors with "empty" files and workaround 'rustdoc' ICE.
- Kconfig: depend on '!CFI_CLANG' and avoid selecting 'CONSTRUCTORS'.
- Code docs: remove non-existing key from 'module!' macro example.
- Docs: trivial rendering fix in arch table.
-----BEGIN PGP SIGNATURE-----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=WaUJ
-----END PGP SIGNATURE-----
Merge tag 'rust-fixes-6.9' of https://github.com/Rust-for-Linux/linux
Pull Rust fixes from Miguel Ojeda:
- Soundness: make internal functions generated by the 'module!' macro
inaccessible, do not implement 'Zeroable' for 'Infallible' and
require 'Send' for the 'Module' trait.
- Build: avoid errors with "empty" files and workaround 'rustdoc' ICE.
- Kconfig: depend on '!CFI_CLANG' and avoid selecting 'CONSTRUCTORS'.
- Code docs: remove non-existing key from 'module!' macro example.
- Docs: trivial rendering fix in arch table.
* tag 'rust-fixes-6.9' of https://github.com/Rust-for-Linux/linux:
rust: remove `params` from `module` macro example
kbuild: rust: force `alloc` extern to allow "empty" Rust files
kbuild: rust: remove unneeded `@rustc_cfg` to avoid ICE
rust: kernel: require `Send` for `Module` implementations
rust: phy: implement `Send` for `Registration`
rust: make mutually exclusive with CFI_CLANG
rust: macros: fix soundness issue in `module!` macro
rust: init: remove impl Zeroable for Infallible
docs: rust: fix improper rendering in Arch Support page
rust: don't select CONSTRUCTORS
* A fix for TASK_SIZE on rv64/NOMMU, to reflect the lack of user/kernel
separation.
* A fix to avoid loading rv64/NOMMU kernel past the start of RAM.
* A fix for RISCV_HWPROBE_EXT_ZVFHMIN on ilp32 to avoid signed integer
overflow in the bitmask.
* The sud_test kselftest has been fixed to properly swizzle the syscall
number into the return register, which are not the same on RISC-V.
* A fix for a build warning in the perf tools on rv32.
* A fix for the CBO selftests, to avoid non-constants leaking into the
inline asm.
* A pair of fixes for T-Head PBMT errata probing, which has been renamed
MAE by the vendor.
-----BEGIN PGP SIGNATURE-----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=LONm
-----END PGP SIGNATURE-----
Merge tag 'riscv-for-linus-6.9-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/riscv/linux
Pull RISC-V fixes from Palmer Dabbelt:
- A fix for TASK_SIZE on rv64/NOMMU, to reflect the lack of user/kernel
separation
- A fix to avoid loading rv64/NOMMU kernel past the start of RAM
- A fix for RISCV_HWPROBE_EXT_ZVFHMIN on ilp32 to avoid signed integer
overflow in the bitmask
- The sud_test kselftest has been fixed to properly swizzle the syscall
number into the return register, which are not the same on RISC-V
- A fix for a build warning in the perf tools on rv32
- A fix for the CBO selftests, to avoid non-constants leaking into the
inline asm
- A pair of fixes for T-Head PBMT errata probing, which has been
renamed MAE by the vendor
* tag 'riscv-for-linus-6.9-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/riscv/linux:
RISC-V: selftests: cbo: Ensure asm operands match constraints, take 2
perf riscv: Fix the warning due to the incompatible type
riscv: T-Head: Test availability bit before enabling MAE errata
riscv: thead: Rename T-Head PBMT to MAE
selftests: sud_test: return correct emulated syscall value on RISC-V
riscv: hwprobe: fix invalid sign extension for RISCV_HWPROBE_EXT_ZVFHMIN
riscv: Fix loading 64-bit NOMMU kernels past the start of RAM
riscv: Fix TASK_SIZE on 64-bit NOMMU
-----BEGIN PGP SIGNATURE-----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=2FY2
-----END PGP SIGNATURE-----
Merge tag '6.9-rc5-cifs-fixes-part2' of git://git.samba.org/sfrench/cifs-2.6
Pull smb client fixes from Steve French:
"Three smb3 client fixes, all also for stable:
- two small locking fixes spotted by Coverity
- FILE_ALL_INFO and network_open_info packing fix"
* tag '6.9-rc5-cifs-fixes-part2' of git://git.samba.org/sfrench/cifs-2.6:
smb3: fix lock ordering potential deadlock in cifs_sync_mid_result
smb3: missing lock when picking channel
smb: client: Fix struct_group() usage in __packed structs
exception in the I2C core for controllers only using target modes,
drop a MAINTAINERS entry, and fix an incorrect DT binding for at24.
-----BEGIN PGP SIGNATURE-----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=BH1X
-----END PGP SIGNATURE-----
Merge tag 'i2c-for-6.9-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/wsa/linux
Pull i2c fixes from Wolfram Sang:
"Fix a race condition in the at24 eeprom handler, a NULL pointer
exception in the I2C core for controllers only using target modes,
drop a MAINTAINERS entry, and fix an incorrect DT binding for at24"
* tag 'i2c-for-6.9-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/wsa/linux:
i2c: smbus: fix NULL function pointer dereference
MAINTAINERS: Drop entry for PCA9541 bus master selector
eeprom: at24: fix memory corruption race condition
dt-bindings: eeprom: at24: Fix ST M24C64-D compatible schema
create_prof_cpu_mask() is no longer used after commit 1f44a22577 ("s390:
convert interrupt handling to use generic hardirq").
Signed-off-by: Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
- Single AMD driver fix for wake interrupt handling in clockstop mode
-----BEGIN PGP SIGNATURE-----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=wO9T
-----END PGP SIGNATURE-----
Merge tag 'soundwire-6.9-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/vkoul/soundwire
Pull soundwire fix from Vinod Koul:
- Single AMD driver fix for wake interrupt handling in clockstop mode
* tag 'soundwire-6.9-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/vkoul/soundwire:
soundwire: amd: fix for wake interrupt handling for clockstop mode
Driver fixes for:
- Revert pl330 issue_pending waits until WFP state due to regression
reported in Bluetooth loading
- Xilinx driver fixes for synchronization, buffer offsets, locking and kdoc
- idxd fixes for spinlock and preventing the migration of the perf
context to an invalid target
- idma driver fix for interrupt handling when powered off
- Tegra driver residual calculation fix
- Owl driver register access fix
-----BEGIN PGP SIGNATURE-----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=Q5fC
-----END PGP SIGNATURE-----
Merge tag 'dmaengine-fix-6.9' of git://git.kernel.org/pub/scm/linux/kernel/git/vkoul/dmaengine
Pull dmaengine fixes from Vinod Koul:
- Revert pl330 issue_pending waits until WFP state due to regression
reported in Bluetooth loading
- Xilinx driver fixes for synchronization, buffer offsets, locking and
kdoc
- idxd fixes for spinlock and preventing the migration of the perf
context to an invalid target
- idma driver fix for interrupt handling when powered off
- Tegra driver residual calculation fix
- Owl driver register access fix
* tag 'dmaengine-fix-6.9' of git://git.kernel.org/pub/scm/linux/kernel/git/vkoul/dmaengine:
dmaengine: idxd: Fix oops during rmmod on single-CPU platforms
dmaengine: xilinx: xdma: Clarify kdoc in XDMA driver
dmaengine: xilinx: xdma: Fix synchronization issue
dmaengine: xilinx: xdma: Fix wrong offsets in the buffers addresses in dma descriptor
dma: xilinx_dpdma: Fix locking
dmaengine: idxd: Convert spinlock to mutex to lock evl workqueue
idma64: Don't try to serve interrupts when device is powered off
dmaengine: tegra186: Fix residual calculation
dmaengine: owl: fix register access functions
dmaengine: Revert "dmaengine: pl330: issue_pending waits until WFP state"