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Afaict, we can just rely on inode->i_dio_count for waiting instead of
this awkward indirection through __I_DIO_WAKEUP. This survives LTP dio
and xfstests dio tests.
Link: https://lore.kernel.org/r/20240816-vfs-misc-dio-v1-1-80fe21a2c710@kernel.org
Reviewed-by: Josef Bacik <josef@toxicpanda.com>
Reviewed-by: Jeff Layton <jlayton@kernel.org>
Signed-off-by: Christian Brauner <brauner@kernel.org>
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This is another flag that is statically set and doesn't need to use up
an FMODE_* bit. Move it to ->fop_flags and free up another FMODE_* bit.
(1) mem_open() used from proc_mem_operations
(2) adi_open() used from adi_fops
(3) drm_open_helper():
(3.1) accel_open() used from DRM_ACCEL_FOPS
(3.2) drm_open() used from
(3.2.1) amdgpu_driver_kms_fops
(3.2.2) psb_gem_fops
(3.2.3) i915_driver_fops
(3.2.4) nouveau_driver_fops
(3.2.5) panthor_drm_driver_fops
(3.2.6) radeon_driver_kms_fops
(3.2.7) tegra_drm_fops
(3.2.8) vmwgfx_driver_fops
(3.2.9) xe_driver_fops
(3.2.10) DRM_GEM_FOPS
(3.2.11) DEFINE_DRM_GEM_DMA_FOPS
(4) struct memdev sets fmode flags based on type of device opened. For
devices using struct mem_fops unsigned offset is used.
Mark all these file operations as FOP_UNSIGNED_OFFSET and add asserts
into the open helper to ensure that the flag is always set.
Link: https://lore.kernel.org/r/20240809-work-fop_unsigned-v1-1-658e054d893e@kernel.org
Reviewed-by: Jeff Layton <jlayton@kernel.org>
Reviewed-by: Jan Kara <jack@suse.cz>
Signed-off-by: Christian Brauner <brauner@kernel.org>
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In do_dentry_open() the usage is:
f->f_op = fops_get(inode->i_fop);
In generated asm the compiler emits 2 reads from inode->i_fop instead of
just one.
This popped up due to false-sharing where loads from that offset end up
bouncing a cacheline during parallel open. While this is going to be fixed,
the spurious load does not need to be there.
This makes do_dentry_open() go down from 1177 to 1154 bytes.
fops_put() is patched to maintain some consistency.
No functional changes.
Reviewed-by: Josef Bacik <josef@toxicpanda.com>
Signed-off-by: Mateusz Guzik <mjguzik@gmail.com>
Link: https://lore.kernel.org/r/20240810064753.1211441-1-mjguzik@gmail.com
Signed-off-by: Christian Brauner <brauner@kernel.org>
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These inlines show up in the fast path (e.g., in do_dentry_open()) and
induce said full barrier regarding i_flctx access when in most cases the
pointer is NULL.
The pointer can be safely checked before issuing the barrier, dodging it
in most cases as a result.
It is plausible the consume fence would be sufficient, but I don't want
to go audit all callers regarding what they before calling here.
Signed-off-by: Mateusz Guzik <mjguzik@gmail.com>
Link: https://lore.kernel.org/r/20240806172846.886570-1-mjguzik@gmail.com
Reviewed-by: Jeff Layton <jlayton@kernel.org>
Signed-off-by: Christian Brauner <brauner@kernel.org>
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Pull drm fixes from Dave Airlie:
"Another week, another set of GPU fixes. amdgpu and vmwgfx leading the
charge, then i915 and xe changes along with v3d and some other bits.
The TTM revert is due to some stuttering graphical apps probably due
to longer stalls while prefaulting.
Seems pretty much where I'd expect things,
ttm:
- revert prefault change, caused stutters
aperture:
- handle non-VGA devices bettter
amdgpu:
- SWSMU gaming stability fix
- SMU 13.0.7 fix
- SWSMU documentation alignment fix
- SMU 14.0.x fixes
- GC 12.x fix
- Display fix
- IP discovery fix
- SMU 13.0.6 fix
i915:
- Fix #11195: The external display connect via USB type-C dock stays
blank after re-connect the dock
- Make DSI backlight work for 2G version of Lenovo Yoga Tab 3 X90F
- Move ARL GuC firmware to correct version
xe:
- Invalidate media_gt TLBs
- Fix HWMON i1 power setup write command
vmwgfx:
- prevent unmapping active read buffers
- fix prime with external buffers
- disable coherent dumb buffers without 3d
v3d:
- disable preemption while updating GPU stats"
* tag 'drm-fixes-2024-08-30' of https://gitlab.freedesktop.org/drm/kernel:
drm/xe/hwmon: Fix WRITE_I1 param from u32 to u16
drm/v3d: Disable preemption while updating GPU stats
drm/amd/pm: Drop unsupported features on smu v14_0_2
drm/amd/pm: Add support for new P2S table revision
drm/amdgpu: support for gc_info table v1.3
drm/amd/display: avoid using null object of framebuffer
drm/amdgpu/gfx12: set UNORD_DISPATCH in compute MQDs
drm/amd/pm: update message interface for smu v14.0.2/3
drm/amdgpu/swsmu: always force a state reprogram on init
drm/amdgpu/smu13.0.7: print index for profiles
drm/amdgpu: align pp_power_profile_mode with kernel docs
drm/i915/dp_mst: Fix MST state after a sink reset
drm/xe: Invalidate media_gt TLBs
drm/i915: ARL requires a newer GSC firmware
drm/i915/dsi: Make Lenovo Yoga Tab 3 X90F DMI match less strict
video/aperture: optionally match the device in sysfb_disable()
drm/vmwgfx: Disable coherent dumb buffers without 3d
drm/vmwgfx: Fix prime with external buffers
drm/vmwgfx: Prevent unmapping active read buffers
Revert "drm/ttm: increase ttm pre-fault value to PMD size"
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https://gitlab.freedesktop.org/drm/misc/kernel into drm-fixes
A revert for a previous TTM commit causing stuttering, 3 fixes for
vmwgfx related to buffer operations, a fix for video/aperture with
non-VGA primary devices, and a preemption status fix for v3d
Signed-off-by: Dave Airlie <airlied@redhat.com>
From: Maxime Ripard <mripard@redhat.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20240829-efficient-swift-from-lemuria-f60c05@houat
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This patch adds a .gen_epilogue to the bpf_verifier_ops. It is similar
to the existing .gen_prologue. Instead of allowing a subsystem
to run code at the beginning of a bpf prog, it allows the subsystem
to run code just before the bpf prog exit.
One of the use case is to allow the upcoming bpf qdisc to ensure that
the skb->dev is the same as the qdisc->dev_queue->dev. The bpf qdisc
struct_ops implementation could either fix it up or drop the skb.
Another use case could be in bpf_tcp_ca.c to enforce snd_cwnd
has sane value (e.g. non zero).
The epilogue can do the useful thing (like checking skb->dev) if it
can access the bpf prog's ctx. Unlike prologue, r1 may not hold the
ctx pointer. This patch saves the r1 in the stack if the .gen_epilogue
has returned some instructions in the "epilogue_buf".
The existing .gen_prologue is done in convert_ctx_accesses().
The new .gen_epilogue is done in the convert_ctx_accesses() also.
When it sees the (BPF_JMP | BPF_EXIT) instruction, it will be patched
with the earlier generated "epilogue_buf". The epilogue patching is
only done for the main prog.
Only one epilogue will be patched to the main program. When the
bpf prog has multiple BPF_EXIT instructions, a BPF_JA is used
to goto the earlier patched epilogue. Majority of the archs
support (BPF_JMP32 | BPF_JA): x86, arm, s390, risv64, loongarch,
powerpc and arc. This patch keeps it simple and always
use (BPF_JMP32 | BPF_JA). A new macro BPF_JMP32_A is added to
generate the (BPF_JMP32 | BPF_JA) insn.
Acked-by: Eduard Zingerman <eddyz87@gmail.com>
Signed-off-by: Martin KaFai Lau <martin.lau@kernel.org>
Link: https://lore.kernel.org/r/20240829210833.388152-4-martin.lau@linux.dev
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
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This patch moves the 'struct bpf_insn insn_buf[16]' stack usage
to the bpf_verifier_env. A '#define INSN_BUF_SIZE 16' is also added
to replace the ARRAY_SIZE(insn_buf) usages.
Both convert_ctx_accesses() and do_misc_fixup() are changed
to use the env->insn_buf.
It is a refactoring work for adding the epilogue_buf[16] in a later patch.
With this patch, the stack size usage decreased.
Before:
./kernel/bpf/verifier.c:22133:5: warning: stack frame size (2584)
After:
./kernel/bpf/verifier.c:22184:5: warning: stack frame size (2264)
Reviewed-by: Eduard Zingerman <eddyz87@gmail.com>
Signed-off-by: Martin KaFai Lau <martin.lau@kernel.org>
Link: https://lore.kernel.org/r/20240829210833.388152-2-martin.lau@linux.dev
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
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Cross-merge networking fixes after downstream PR.
Conflicts:
drivers/net/ethernet/faraday/ftgmac100.c
4186c8d9e6af ("net: ftgmac100: Ensure tx descriptor updates are visible")
e24a6c874601 ("net: ftgmac100: Get link speed and duplex for NC-SI")
https://lore.kernel.org/0b851ec5-f91d-4dd3-99da-e81b98c9ed28@kernel.org
net/ipv4/tcp.c
bac76cf89816 ("tcp: fix forever orphan socket caused by tcp_abort")
edefba66d929 ("tcp: rstreason: introduce SK_RST_REASON_TCP_STATE for active reset")
https://lore.kernel.org/20240828112207.5c199d41@canb.auug.org.au
No adjacent changes.
Link: https://patch.msgid.link/20240829130829.39148-1-pabeni@redhat.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
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A new DSA device ID, 0x1212, and a new IAA device ID, 0x1216, are
introduced for Diamond Rapids platform. Add the device IDs to the IDXD
driver.
The name "IAA" is used in new code instead of the old name "IAX".
However, the "IAX" naming (e.g., IDXD_TYPE_IAX) is retained for legacy
code compatibility.
Signed-off-by: Fenghua Yu <fenghua.yu@intel.com>
Reviewed-by: Dave Jiang <dave.jiang@intel.com>
Link: https://lore.kernel.org/r/20240828233401.186007-3-fenghua.yu@intel.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>
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A new DSA device ID, 0x11fb, is introduced for the Granite Rapids-D
platform. Add the device ID to the IDXD driver.
Since a potential security issue has been fixed on the new device, it's
secure to assign the device to virtual machines, and therefore, the new
device ID will not be added to the VFIO denylist. Additionally, the new
device ID may be useful in identifying and addressing any other potential
issues with this specific device in the future. The same is also applied
to any other new DSA/IAA devices with new device IDs.
Signed-off-by: Fenghua Yu <fenghua.yu@intel.com>
Reviewed-by: Dave Jiang <dave.jiang@intel.com>
Link: https://lore.kernel.org/r/20240828233401.186007-2-fenghua.yu@intel.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>
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Switch to the new kmem_cache_create_rcu() helper which allows us to use
a custom free pointer offset avoiding the need to have an external free
pointer which would grow struct file behind our backs.
Link: https://lore.kernel.org/r/20240828-work-kmem_cache-rcu-v3-3-5460bc1f09f6@kernel.org
Acked-by: Mike Rapoport (Microsoft) <rppt@kernel.org>
Reviewed-by: Vlastimil Babka <vbabka@suse.cz>
Signed-off-by: Christian Brauner <brauner@kernel.org>
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When a kmem cache is created with SLAB_TYPESAFE_BY_RCU the free pointer
must be located outside of the object because we don't know what part of
the memory can safely be overwritten as it may be needed to prevent
object recycling.
That has the consequence that SLAB_TYPESAFE_BY_RCU may end up adding a
new cacheline. This is the case for e.g., struct file. After having it
shrunk down by 40 bytes and having it fit in three cachelines we still
have SLAB_TYPESAFE_BY_RCU adding a fourth cacheline because it needs to
accommodate the free pointer.
Add a new kmem_cache_create_rcu() function that allows the caller to
specify an offset where the free pointer is supposed to be placed.
Link: https://lore.kernel.org/r/20240828-work-kmem_cache-rcu-v3-2-5460bc1f09f6@kernel.org
Acked-by: Mike Rapoport (Microsoft) <rppt@kernel.org>
Reviewed-by: Vlastimil Babka <vbabka@suse.cz>
Signed-off-by: Christian Brauner <brauner@kernel.org>
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Now that we shrunk struct file to 192 bytes aka 3 cachelines reorder
struct file to not leave any holes or have members cross cachelines.
Add a short comment to each of the fields and mark the cachelines.
It's possible that we may have to tweak this based on profiling in the
future. So far I had Jens test this comparing io_uring with non-fixed
and fixed files and it improved performance. The layout is a combination
of Jens' and my changes.
Link: https: //lore.kernel.org/r/20240824-peinigen-hocken-7384b977c643@brauner
Signed-off-by: Christian Brauner <brauner@kernel.org>
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Add support for the AXP717 PMIC to utilize the ADC (for reading
voltage, current, and temperature information from the PMIC) as well
as the USB charger and battery.
Signed-off-by: Chris Morgan <macromorgan@hotmail.com>
Link: https://lore.kernel.org/r/20240821215456.962564-12-macroalpha82@gmail.com
Signed-off-by: Lee Jones <lee@kernel.org>
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queue_limits_max_zone_append_sectors doesn't change the lim argument,
so mark it as const.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Damien Le Moal <dlemoal@kernel.org>
Tested-by: Hans Holmberg <hans.holmberg@wdc.com>
Reviewed-by: Hans Holmberg <hans.holmberg@wdc.com>
Link: https://lore.kernel.org/r/20240826173820.1690925-3-hch@lst.de
Signed-off-by: Jens Axboe <axboe@kernel.dk>
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The current setup with bio_may_exceed_limit and __bio_split_to_limits
is a bit of a mess.
Change it so that __bio_split_to_limits does all the work and is just
a variant of bio_split_to_limits that returns nr_segs. This is done
by inlining it and instead have the various bio_split_* helpers directly
submit the potentially split bios.
To support btrfs, the rw version has a lower level helper split out
that just returns the offset to split. This turns out to nicely clean
up the btrfs flow as well.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Acked-by: David Sterba <dsterba@suse.com>
Reviewed-by: Damien Le Moal <dlemoal@kernel.org>
Tested-by: Hans Holmberg <hans.holmberg@wdc.com>
Reviewed-by: Hans Holmberg <hans.holmberg@wdc.com>
Link: https://lore.kernel.org/r/20240826173820.1690925-2-hch@lst.de
Signed-off-by: Jens Axboe <axboe@kernel.dk>
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Merge thermal core updates for 6.12 which, among other things, rework
the thermal driver interface for binding cooling devices to thermal
zones and add a thermal core testing module:
- Update some thermal drivers to eliminate thermal_zone_get_trip()
calls from them and get rid of that function (Rafael Wysocki).
- Update the thermal sysfs code to store trip point attributes in trip
descriptors and get to trip points via attribute pointers (Rafael
Wysocki).
- Move the computation of the low and high boundaries for
thermal_zone_set_trips() to __thermal_zone_device_update() (Daniel
Lezcano).
- Introduce a debugfs-based facility for thermal core testing (Rafael
Wysocki).
- Replace the thermal zone .bind() and .unbind() callbacks for binding
cooling devices to thermal zones with one .should_bind() callback
used for deciding whether or not a given cooling devices should be
bound to a given trip point in a given thermal zone (Rafael Wysocki).
- Eliminate code that has no more users after the other changes, drop
some redundant checks from the thermal core and clean it up (Rafael
Wysocki).
- Fix rounding of delay jiffies in the thermal core (Rafael Wysocki).
* thermal-core: (31 commits)
thermal: core: Drop tz field from struct thermal_instance
thermal: core: Drop redundant checks from thermal_bind_cdev_to_trip()
thermal: core: Rename cdev-to-thermal-zone bind/unbind functions
thermal: core: Fix rounding of delay jiffies
thermal: core: Clean up trip bind/unbind functions
thermal: core: Drop unused bind/unbind functions and callbacks
thermal/of: Use the .should_bind() thermal zone callback
thermal: imx: Use the .should_bind() thermal zone callback
mlxsw: core_thermal: Use the .should_bind() thermal zone callback
platform/x86: acerhdf: Use the .should_bind() thermal zone callback
thermal: core: Unexport thermal_bind_cdev_to_trip() and thermal_unbind_cdev_from_trip()
thermal: ACPI: Use the .should_bind() thermal zone callback
thermal: core: Introduce .should_bind() thermal zone callback
thermal: core: Move thermal zone locking out of bind/unbind functions
thermal: sysfs: Use the dev argument in instance-related show/store
thermal: core: Drop redundant thermal instance checks
thermal: core: Rearrange checks in thermal_bind_cdev_to_trip()
thermal: core: Fold two functions into their respective callers
thermal: Introduce a debugfs-based testing facility
thermal/core: Compute low and high boundaries in thermal_zone_device_update()
...
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There is a need for userspace applications to open HID devices directly.
Use-cases include configuration of gaming mice or direct access to
joystick devices. The latter is currently handled by the uaccess tag in
systemd, other devices include more custom/local configurations or just
sudo.
A better approach is what we already have for evdev devices: give the
application a file descriptor and revoke it when it may no longer access
that device.
This patch is the hidraw equivalent to the EVIOCREVOKE ioctl, see
commit c7dc65737c9a ("Input: evdev - add EVIOCREVOKE ioctl") for full
details.
An MR for systemd-logind has been filed here:
https://github.com/systemd/systemd/pull/33970
Signed-off-by: Peter Hutterer <peter.hutterer@who-t.net>
Link: https://patch.msgid.link/20240827-hidraw-revoke-v5-1-d004a7451aea@kernel.org
Signed-off-by: Benjamin Tissoires <bentiss@kernel.org>
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A NULL dev->dma_parms indicates either a bus that is not DMA capable or
grave bug in the implementation of the bus code.
There isn't much the driver can do in terms of error handling for either
case, so just warn and continue as DMA operations will fail anyway.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Robin Murphy <robin.murphy@arm.com>
Reviewed-by: Martin K. Petersen <martin.petersen@oracle.com>
Acked-by: Ulf Hansson <ulf.hansson@linaro.org> # For MMC
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A NULL dev->dma_parms indicates either a bus that is not DMA capable or
grave bug in the implementation of the bus code.
There isn't much the driver can do in terms of error handling for either
case, so just warn and continue as DMA operations will fail anyway.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Robin Murphy <robin.murphy@arm.com>
Reviewed-by: Martin K. Petersen <martin.petersen@oracle.com>
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A NULL dev->dma_parms indicates either a bus that is not DMA capable or
grave bug in the implementation of the bus code.
There isn't much the driver can do in terms of error handling for either
case, so just warn and continue as DMA operations will fail anyway.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Robin Murphy <robin.murphy@arm.com>
Reviewed-by: Martin K. Petersen <martin.petersen@oracle.com>
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The i.MX95 System manager exports SCMI MISC protocol for linux to do
various settings, such as set board gpio expander as wakeup source.
The driver is to add the support.
Reviewed-by: Cristian Marussi <cristian.marussi@arm.com>
Signed-off-by: Peng Fan <peng.fan@nxp.com>
Message-Id: <20240823-imx95-bbm-misc-v2-v8-5-e600ed9e9271@nxp.com>
Signed-off-by: Sudeep Holla <sudeep.holla@arm.com>
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i.MX95 System Manager(SM) firmware includes a SCMI vendor protocol, SCMI
MISC protocol which includes controls that are misc settings/actions that
must be exposed from the SM to agents. They are device specific and are
usually define to access bit fields in various mix block control modules,
IOMUX_GPR, and other General Purpose registers, Control Status Registers
owned by the SM.
Reviewed-by: Cristian Marussi <cristian.marussi@arm.com>
Signed-off-by: Peng Fan <peng.fan@nxp.com>
Message-Id: <20240823-imx95-bbm-misc-v2-v8-3-e600ed9e9271@nxp.com>
Signed-off-by: Sudeep Holla <sudeep.holla@arm.com>
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i.MX95 has a battery-backed module(BBM), which has persistent storage
(GPR), an RTC, and the ON/OFF button. The System Manager(SM) firmware
use SCMI vendor protocol(SCMI BBM) to let agent be able to use GPR, RTC
and ON/OFF button.
Reviewed-by: Cristian Marussi <cristian.marussi@arm.com>
Signed-off-by: Peng Fan <peng.fan@nxp.com>
Message-Id: <20240823-imx95-bbm-misc-v2-v8-2-e600ed9e9271@nxp.com>
Signed-off-by: Sudeep Holla <sudeep.holla@arm.com>
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https://git.kernel.org/pub/scm/linux/kernel/git/qcom/linux into arm/fixes
Qualcomm driver fixes for v6.11
This corrects the tzmem virt-to-phys conversion, which caused issues for
the uefisecapp implementation of EFI variable access. SDM670 is excluded
from tzmem usage due to reported issues.
The SCM get wait queue context call is corrected to be marked ATOMIC and
some dead code in qseecom, following the tzmem conversion, is removed.
The memory backing command DB is remapped writecombined, to avoid XPU
violations when Linux runs without the Qualcomm hypervisor.
Two compile fixes are added for pd-mapper, and the broken reference
count is corrected, to make pd-mapper deal with remoteprocs going away.
In pmic_glink a race condition where the client callbacks might be
called before we returned the client handle is corrected. The broken conditions
for when to signal that the firmware is going down is also corrected.
In the pmic_glink UCSI driver, the ucsi_unregister() is moved out of the
pdr callback, as this is being invoked in atomic context.
Konrad's email address is updated in MAINTAINERS, and related mailmap
entries are added.
* tag 'qcom-drivers-fixes-for-6.11' of https://git.kernel.org/pub/scm/linux/kernel/git/qcom/linux:
soc: qcom: pd-mapper: Fix singleton refcount
firmware: qcom: tzmem: disable sdm670 platform
soc: qcom: pmic_glink: Actually communicate when remote goes down
usb: typec: ucsi: Move unregister out of atomic section
soc: qcom: pmic_glink: Fix race during initialization
firmware: qcom: qseecom: remove unused functions
firmware: qcom: tzmem: fix virtual-to-physical address conversion
firmware: qcom: scm: Mark get_wq_ctx() as atomic call
MAINTAINERS: Update Konrad Dybcio's email address
mailmap: Add an entry for Konrad Dybcio
soc: qcom: pd-mapper: mark qcom_pdm_domains as __maybe_unused
soc: qcom: cmd-db: Map shared memory as WC, not WB
soc: qcom: pd-mapper: Depend on ARCH_QCOM || COMPILE_TEST
Link: https://lore.kernel.org/r/20240826145209.1646159-1-andersson@kernel.org
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
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git://git.kernel.org/pub/scm/linux/kernel/git/cel/linux
Pull nfsd fixes from Chuck Lever:
- Fix a number of crashers
- Update email address for an NFSD reviewer
* tag 'nfsd-6.11-2' of git://git.kernel.org/pub/scm/linux/kernel/git/cel/linux:
fs/nfsd: fix update of inode attrs in CB_GETATTR
nfsd: fix potential UAF in nfsd4_cb_getattr_release
nfsd: hold reference to delegation when updating it for cb_getattr
MAINTAINERS: Update Olga Kornievskaia's email address
nfsd: prevent panic for nfsv4.0 closed files in nfs4_show_open
nfsd: ensure that nfsd4_fattr_args.context is zeroed out
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Commit d70241913413 ("dmaengine: ti: k3-udma: Add glue layer for non DMAengine users")
declared but never implemented these.
Signed-off-by: Yue Haibing <yuehaibing@huawei.com>
Acked-by: Peter Ujfalusi <peter.ujfalusi@gmail.com>
Link: https://lore.kernel.org/r/20240810094540.2589310-1-yuehaibing@huawei.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>
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Adds driver to enable PCIe board which uses AMD QDMA (the Queue-based
Direct Memory Access) subsystem. For example, Xilinx Alveo V70 AI
Accelerator devices.
https://www.xilinx.com/applications/data-center/v70.html
The QDMA subsystem is used in conjunction with the PCI Express IP block
to provide high performance data transfer between host memory and the
card's DMA subsystem.
+-------+ +-------+ +-----------+
PCIe | | | | | |
Tx/Rx | | | | AXI | |
<=======> | PCIE | <===> | QDMA | <====>| User Logic|
| | | | | |
+-------+ +-------+ +-----------+
The primary mechanism to transfer data using the QDMA is for the QDMA
engine to operate on instructions (descriptors) provided by the host
operating system. Using the descriptors, the QDMA can move data in both
the Host to Card (H2C) direction, or the Card to Host (C2H) direction.
The QDMA provides a per-queue basis option whether DMA traffic goes
to an AXI4 memory map (MM) interface or to an AXI4-Stream interface.
The hardware detail is provided by
https://docs.xilinx.com/r/en-US/pg302-qdma
Implements dmaengine APIs to support MM DMA transfers.
- probe the available DMA channels
- use dma_slave_map for channel lookup
- use virtual channel to manage dmaengine tx descriptors
- implement device_prep_slave_sg callback to handle host scatter gather
list
Signed-off-by: Nishad Saraf <nishads@amd.com>
Signed-off-by: Lizhi Hou <lizhi.hou@amd.com>
Link: https://lore.kernel.org/r/20240819211948.688786-2-lizhi.hou@amd.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>
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When this file was renamed in commit b8a6d9980f75 ("dma: ipu: rename
mach/ipu.h to include/linux/dma/ipu-dma.h"), 4 .c files have been modified
accordingly:
drivers/dma/ipu/ipu_idmac.c
drivers/dma/ipu/ipu_irq.c
--> removed in commit f1de55ff7c70 ("dmaengine: ipu: Remove the driver")
in 2023-08
drivers/media/platform/soc_camera/mx3_camera.c
--> removed in commit c93cc61475eb ("[media] staging/media: remove
deprecated mx3 driver") in 2016-06
drivers/video/mx3fb.c
--> removed in commit bfac19e239a7 ("fbdev: mx3fb: Remove the driver")
in 2023-08
Now include/linux/dma/ipu-dma.h is unused and can be removed as-well.
Signed-off-by: Christophe JAILLET <christophe.jaillet@wanadoo.fr>
Link: https://lore.kernel.org/r/532e7e2816ccf226f3ab1fa76ec7873bc09299d0.1724258714.git.christophe.jaillet@wanadoo.fr
Signed-off-by: Vinod Koul <vkoul@kernel.org>
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The fallocate system call takes a mode argument, but that argument
contains a wild mix of exclusive modes and an optional flags.
Replace FALLOC_FL_SUPPORTED_MASK with FALLOC_FL_MODE_MASK, which excludes
the optional flag bit, so that we can use switch statement on the value
to easily enumerate the cases while getting the check for duplicate modes
for free.
To make this (and in the future the file system implementations) more
readable also add a symbolic name for the 0 mode used to allocate blocks.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Link: https://lore.kernel.org/r/20240827065123.1762168-4-hch@lst.de
Reviewed-by: Darrick J. Wong <djwong@kernel.org>
Reviewed-by: Jan Kara <jack@suse.cz>
Signed-off-by: Christian Brauner <brauner@kernel.org>
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This adds GENMASK_U128() and __GENMASK_U128() macros using __BITS_PER_U128
and __int128 data types. These macros will be used in providing support for
generating 128 bit masks.
The macros wouldn't work in all assembler flavors for reasons described
in the comments on top of declarations. Enforce it for more by adding
!__ASSEMBLY__ guard.
Cc: Yury Norov <yury.norov@gmail.com>
Cc: Rasmus Villemoes <linux@rasmusvillemoes.dk>
Cc: Arnd Bergmann <arnd@arndb.de>>
Cc: linux-kernel@vger.kernel.org
Cc: linux-arch@vger.kernel.org
Reviewed-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Anshuman Khandual <anshuman.khandual@arm.com>
Signed-off-by: Yury Norov <yury.norov@gmail.com>
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Short DIO reads, particularly in relation to cifs, are not being handled
correctly by cifs and netfslib. This can be tested by doing a DIO read of
a file where the size of read is larger than the size of the file. When it
crosses the EOF, it gets a short read and this gets retried, and in the
case of cifs, the retry read fails, with the failure being translated to
ENODATA.
Fix this by the following means:
(1) Add a flag, NETFS_SREQ_HIT_EOF, for the filesystem to set when it
detects that the read did hit the EOF.
(2) Make the netfslib read assessment stop processing subrequests when it
encounters one with that flag set.
(3) Return rreq->transferred, the accumulated contiguous amount read to
that point, to userspace for a DIO read.
(4) Make cifs set the flag and clear the error if the read RPC returned
ENODATA.
(5) Make cifs set the flag and clear the error if a short read occurred
without error and the read-to file position is now at the remote inode
size.
Fixes: 69c3c023af25 ("cifs: Implement netfslib hooks")
Signed-off-by: David Howells <dhowells@redhat.com>
cc: Steve French <sfrench@samba.org>
cc: Paulo Alcantara <pc@manguebit.com>
cc: Jeff Layton <jlayton@kernel.org>
cc: linux-cifs@vger.kernel.org
cc: netfs@lists.linux.dev
cc: linux-fsdevel@vger.kernel.org
Signed-off-by: Steve French <stfrench@microsoft.com>
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Selvin Xavier says:
=============
Enable the Variable size Work Queue entry support for Gen P7
adapters. This would help in the better utilization of the queue memory
and pci bandwidth due to the smaller send queue Work entries.
=============
Based on v6.11-rc5 for dependencies.
* bnxt_re_variable_wqes: (829 commits)
RDMA/bnxt_re: Enable variable size WQEs for user space applications
RDMA/bnxt_re: Handle variable WQE support for user applications
RDMA/bnxt_re: Fix the table size for PSN/MSN entries
RDMA/bnxt_re: Get the WQE index from slot index while completing the WQEs
RDMA/bnxt_re: Add support for Variable WQE in Genp7 adapters
Linux 6.11-rc5
...
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>
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Now that we shrank struct file by 24 bytes we still have a 4 byte hole.
If we move struct file_ra_state into the union and f_iocb_flags out of
the union we close that whole and bring down struct file to 192 bytes.
Which means struct file is 3 cachelines and we managed to shrink it by
40 bytes this cycle.
I've tried to audit all codepaths that use f_ra and none of them seem to
rely on it in file->f_op->release() and never have since commit
1da177e4c3f4 ("Linux-2.6.12-rc2").
Link: https://lore.kernel.org/r/20240823-luftdicht-berappen-d69a2166a0db@brauner
Reviewed-by: Jeff Layton <jlayton@kernel.org>
Reviewed-by: Jens Axboe <axboe@kernel.dk>
Signed-off-by: Christian Brauner <brauner@kernel.org>
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We do embedd struct fown_struct into struct file letting it take up 32
bytes in total. We could tweak struct fown_struct to be more compact but
really it shouldn't even be embedded in struct file in the first place.
Instead, actual users of struct fown_struct should allocate the struct
on demand. This frees up 24 bytes in struct file.
That will have some potentially user-visible changes for the ownership
fcntl()s. Some of them can now fail due to allocation failures.
Practically, that probably will almost never happen as the allocations
are small and they only happen once per file.
The fown_struct is used during kill_fasync() which is used by e.g.,
pipes to generate a SIGIO signal. Sending of such signals is conditional
on userspace having set an owner for the file using one of the F_OWNER
fcntl()s. Such users will be unaffected if struct fown_struct is
allocated during the fcntl() call.
There are a few subsystems that call __f_setown() expecting
file->f_owner to be allocated:
(1) tun devices
file->f_op->fasync::tun_chr_fasync()
-> __f_setown()
There are no callers of tun_chr_fasync().
(2) tty devices
file->f_op->fasync::tty_fasync()
-> __tty_fasync()
-> __f_setown()
tty_fasync() has no additional callers but __tty_fasync() has. Note
that __tty_fasync() only calls __f_setown() if the @on argument is
true. It's called from:
file->f_op->release::tty_release()
-> tty_release()
-> __tty_fasync()
-> __f_setown()
tty_release() calls __tty_fasync() with @on false
=> __f_setown() is never called from tty_release().
=> All callers of tty_release() are safe as well.
file->f_op->release::tty_open()
-> tty_release()
-> __tty_fasync()
-> __f_setown()
__tty_hangup() calls __tty_fasync() with @on false
=> __f_setown() is never called from tty_release().
=> All callers of __tty_hangup() are safe as well.
From the callchains it's obvious that (1) and (2) end up getting called
via file->f_op->fasync(). That can happen either through the F_SETFL
fcntl() with the FASYNC flag raised or via the FIOASYNC ioctl(). If
FASYNC is requested and the file isn't already FASYNC then
file->f_op->fasync() is called with @on true which ends up causing both
(1) and (2) to call __f_setown().
(1) and (2) are the only subsystems that call __f_setown() from the
file->f_op->fasync() handler. So both (1) and (2) have been updated to
allocate a struct fown_struct prior to calling fasync_helper() to
register with the fasync infrastructure. That's safe as they both call
fasync_helper() which also does allocations if @on is true.
The other interesting case are file leases:
(3) file leases
lease_manager_ops->lm_setup::lease_setup()
-> __f_setown()
Which in turn is called from:
generic_add_lease()
-> lease_manager_ops->lm_setup::lease_setup()
-> __f_setown()
So here again we can simply make generic_add_lease() allocate struct
fown_struct prior to the lease_manager_ops->lm_setup::lease_setup()
which happens under a spinlock.
With that the two remaining subsystems that call __f_setown() are:
(4) dnotify
(5) sockets
Both have their own custom ioctls to set struct fown_struct and both
have been converted to allocate a struct fown_struct on demand from
their respective ioctls.
Interactions with O_PATH are fine as well e.g., when opening a /dev/tty
as O_PATH then no file->f_op->open() happens thus no file->f_owner is
allocated. That's fine as no file operation will be set for those and
the device has never been opened. fcntl()s called on such things will
just allocate a ->f_owner on demand. Although I have zero idea why'd you
care about f_owner on an O_PATH fd.
Link: https://lore.kernel.org/r/20240813-work-f_owner-v2-1-4e9343a79f9f@kernel.org
Reviewed-by: Jeff Layton <jlayton@kernel.org>
Signed-off-by: Christian Brauner <brauner@kernel.org>
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When using resctrl on systems with Sub-NUMA Clustering enabled, monitoring
groups may be allocated RMID values which would overrun the
arch_mbm_{local,total} arrays.
This is due to inconsistencies in whether the SNC-adjusted num_rmid value or
the unadjusted value in resctrl_arch_system_num_rmid_idx() is used. The
num_rmid value for the L3 resource is currently:
resctrl_arch_system_num_rmid_idx() / snc_nodes_per_l3_cache
As a simple fix, make resctrl_arch_system_num_rmid_idx() return the
SNC-adjusted, L3 num_rmid value on x86.
Fixes: e13db55b5a0d ("x86/resctrl: Introduce snc_nodes_per_l3_cache")
Signed-off-by: Peter Newman <peternewman@google.com>
Signed-off-by: Borislav Petkov (AMD) <bp@alien8.de>
Reviewed-by: Reinette Chatre <reinette.chatre@intel.com>
Link: https://lore.kernel.org/r/20240822190212.1848788-1-peternewman@google.com
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KSZ8895/KSZ8864 is a switch family between KSZ8863/73 and KSZ8795, so it
shares some registers and functions in those switches already
implemented in the KSZ DSA driver.
Signed-off-by: Tristram Ha <tristram.ha@microchip.com>
Tested-by: Pieter Van Trappen <pieter.van.trappen@cern.ch>
Reviewed-by: Oleksij Rempel <o.rempel@pengutronix.de>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
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There are two charger current limit registers:
- Fast charge current limit (which controls current going from the
charger to the battery);
- CHGIN input current limit (which controls current going into the
charger through the cable).
Add the necessary functions to retrieve the CHGIN input limit (from CHARGER
regulator) and maximum fast charge current values, and expose them as power
supply properties.
Tested-by: Henrik Grimler <henrik@grimler.se>
Signed-off-by: Artur Weber <aweber.kernel@gmail.com>
Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Link: https://lore.kernel.org/r/20240816-max77693-charger-extcon-v4-3-050a0a9bfea0@gmail.com
Signed-off-by: Sebastian Reichel <sebastian.reichel@collabora.com>
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By allowing the drivers to return a "const *" they can constify their
static report arrays.
This makes it clear to driver authors that the HID core will not modify
those reports and they can be reused for multiple devices.
Furthermore security is slightly improved as those reports are protected
against accidental or malicious modifications.
[bentiss: fixup hid-cougar.c and hid-multitouch.c for latest version of
the master branch]
Signed-off-by: Thomas Weißschuh <linux@weissschuh.net>
Link: https://patch.msgid.link/20240803-hid-const-fixup-v2-6-f53d7a7b29d8@weissschuh.net
Signed-off-by: Benjamin Tissoires <bentiss@kernel.org>
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Once a report descriptor has been created by the HID core it is not
supposed to be modified anymore.
Enforce this invariant through the type system.
Signed-off-by: Thomas Weißschuh <linux@weissschuh.net>
Link: https://patch.msgid.link/20240803-hid-const-fixup-v2-5-f53d7a7b29d8@weissschuh.net
Signed-off-by: Benjamin Tissoires <bentiss@kernel.org>
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fetch_item() does not modify the descriptor it operates on.
As a prerequisite for the constification of hid_driver::dev_rdesc,
mark the parameters and return value of fetch_item() as const.
Also adapt the variable types in the callers to match this
constification.
Signed-off-by: Thomas Weißschuh <linux@weissschuh.net>
Link: https://patch.msgid.link/20240803-hid-const-fixup-v2-4-f53d7a7b29d8@weissschuh.net
Signed-off-by: Benjamin Tissoires <bentiss@kernel.org>
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Once a report descriptor has been created by the HID core it is not
supposed to be modified anymore.
Enforce this invariant through the type system.
Signed-off-by: Thomas Weißschuh <linux@weissschuh.net>
Link: https://patch.msgid.link/20240803-hid-const-fixup-v2-3-f53d7a7b29d8@weissschuh.net
Signed-off-by: Benjamin Tissoires <bentiss@kernel.org>
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The parameter is never modified, so mark it as const.
This is a prerequisite for constification changes in the HID core.
Signed-off-by: Thomas Weißschuh <linux@weissschuh.net>
Link: https://patch.msgid.link/20240803-hid-const-fixup-v2-2-f53d7a7b29d8@weissschuh.net
Signed-off-by: Benjamin Tissoires <bentiss@kernel.org>
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The parameter is never modified, so mark it as const.
Also inline the return statement to avoid a type mismatch error.
This is a prerequisite for constification changes in the HID core.
Signed-off-by: Thomas Weißschuh <linux@weissschuh.net>
Link: https://patch.msgid.link/20240803-hid-const-fixup-v2-1-f53d7a7b29d8@weissschuh.net
Signed-off-by: Benjamin Tissoires <bentiss@kernel.org>
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Nicolin Chen says:
=========
IOMMU_RESV_SW_MSI is a unique region defined by an IOMMU driver. Though it
is eventually used by a device for address translation to an MSI location
(including nested cases), practically it is a universal region across all
domains allocated for the IOMMU that defines it.
Currently IOMMUFD core fetches and reserves the region during an attach to
an hwpt_paging. It works with a hwpt_paging-only case, but might not work
with a nested case where a device could directly attach to a hwpt_nested,
bypassing the hwpt_paging attachment.
Move the enforcement forward, to the hwpt_paging allocation function. Then
clean up all the SW_MSI related things in the attach/replace routine.
=========
Based on v6.11-rc5 for dependencies.
* nesting_reserved_regions: (562 commits)
iommufd/device: Enforce reserved IOVA also when attached to hwpt_nested
Linux 6.11-rc5
...
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RISC-V IMSIC interrupt controller provides IPI and MSI support.
Currently, DT based drivers setup the IPI feature early during boot but
defer setting up the MSI functionality. However, in ACPI systems, PCI
subsystem is probed early and assume MSI controller is already setup.
Hence, both IPI and MSI features need to be initialized early itself.
Signed-off-by: Sunil V L <sunilvl@ventanamicro.com>
Reviewed-by: Anup Patel <anup@brainfault.org>
Tested-by: Björn Töpel <bjorn@rivosinc.com>
Acked-by: Thomas Gleixner <tglx@linutronix.de>
Link: https://patch.msgid.link/20240812005929.113499-16-sunilvl@ventanamicro.com
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
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Add the IRQ model for RISC-V INTC so that acpi_set_irq_model can use this
for RISC-V.
Signed-off-by: Sunil V L <sunilvl@ventanamicro.com>
Tested-by: Björn Töpel <bjorn@rivosinc.com>
Link: https://patch.msgid.link/20240812005929.113499-8-sunilvl@ventanamicro.com
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
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Add a new function for RISC-V to do architecture specific initialization
similar to acpi_arm_init(). Some of the ACPI tables are architecture
specific and there is no reason trying to find them on other
architectures. So, add acpi_riscv_init() similar to acpi_arm_init().
Signed-off-by: Sunil V L <sunilvl@ventanamicro.com>
Tested-by: Björn Töpel <bjorn@rivosinc.com>
Link: https://patch.msgid.link/20240812005929.113499-4-sunilvl@ventanamicro.com
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
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Unlike OF framework, the irqchip probe using IRQCHIP_ACPI_DECLARE has no
order defined. Depending on the Makefile is not a good idea. So,
usually it is worked around by mandating only root interrupt controller
probed using IRQCHIP_ACPI_DECLARE and other interrupt controllers are
probed via cascade mechanism.
However, this is also not a clean solution because if there are multiple
root controllers (ex: RINTC in RISC-V which is per CPU) which need to be
probed first, then the cascade will happen for every root controller.
So, introduce an architecture specific weak function
arch_sort_irqchip_probe() to order the probing of the interrupt
controllers which can be implemented by different architectures as per
their interrupt controller hierarchy.
Signed-off-by: Sunil V L <sunilvl@ventanamicro.com>
Tested-by: Björn Töpel <bjorn@rivosinc.com>
Link: https://patch.msgid.link/20240812005929.113499-3-sunilvl@ventanamicro.com
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
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