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git://git.kernel.org/pub/scm/linux/kernel/git/brauner/linux
Pull user work thread updates from Christian Brauner:
"This contains the work generalizing the ability to create a kernel
worker from a userspace process.
Such user workers will run with the same credentials as the userspace
process they were created from providing stronger security and
accounting guarantees than the traditional override_creds() approach
ever could've hoped for.
The original work was heavily based and optimzed for the needs of
io_uring which was the first user. However, as it quickly turned out
the ability to create user workers inherting properties from a
userspace process is generally useful.
The vhost subsystem currently creates workers using the kthread api.
The consequences of using the kthread api are that RLIMITs don't work
correctly as they are inherited from khtreadd. This leads to bugs
where more workers are created than would be allowed by the RLIMITs of
the userspace process in lieu of which workers are created.
Problems like this disappear with user workers created from the
userspace processes for which they perform the work. In addition,
providing this api allows vhost to remove additional complexity. For
example, cgroup and mm sharing will just work out of the box with user
workers based on the relevant userspace process instead of manually
ensuring the correct cgroup and mm contexts are used.
So the vhost subsystem should simply be made to use the same mechanism
as io_uring. To this end the original mechanism used for
create_io_thread() is generalized into user workers:
- Introduce PF_USER_WORKER as a generic indicator that a given task
is a user worker, i.e., a kernel task that was created from a
userspace process. Now a PF_IO_WORKER thread is just a specialized
version of PF_USER_WORKER. So io_uring io workers raise both flags.
- Make copy_process() available to core kernel code
- Extend struct kernel_clone_args with the following bitfields
allowing to indicate to copy_process():
- to create a user worker (raise PF_USER_WORKER)
- to not inherit any files from the userspace process
- to ignore signals
After all generic changes are in place the vhost subsystem implements
a new dedicated vhost api based on user workers. Finally, vhost is
switched to rely on the new api moving it off of kthreads.
Thanks to Mike for sticking it out and making it through this rather
arduous journey"
* tag 'v6.4/kernel.user_worker' of git://git.kernel.org/pub/scm/linux/kernel/git/brauner/linux:
vhost: use vhost_tasks for worker threads
vhost: move worker thread fields to new struct
vhost_task: Allow vhost layer to use copy_process
fork: allow kernel code to call copy_process
fork: Add kernel_clone_args flag to ignore signals
fork: add kernel_clone_args flag to not dup/clone files
fork/vm: Move common PF_IO_WORKER behavior to new flag
kernel: Make io_thread and kthread bit fields
kthread: Pass in the thread's name during creation
kernel: Allow a kernel thread's name to be set in copy_process
csky: Remove kernel_thread declaration
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Pull documentation updates from Jonathan Corbet:
"Commit volume in documentation is relatively low this time, but there
is still a fair amount going on, including:
- Reorganize the architecture-specific documentation under
Documentation/arch
This makes the structure match the source directory and helps to
clean up the mess that is the top-level Documentation directory a
bit. This work creates the new directory and moves x86 and most of
the less-active architectures there.
The current plan is to move the rest of the architectures in 6.5,
with the patches going through the appropriate subsystem trees.
- Some more Spanish translations and maintenance of the Italian
translation
- A new "Kernel contribution maturity model" document from Ted
- A new tutorial on quickly building a trimmed kernel from Thorsten
Plus the usual set of updates and fixes"
* tag 'docs-6.4' of git://git.lwn.net/linux: (47 commits)
media: Adjust column width for pdfdocs
media: Fix building pdfdocs
docs: clk: add documentation to log which clocks have been disabled
docs: trace: Fix typo in ftrace.rst
Documentation/process: always CC responsible lists
docs: kmemleak: adjust to config renaming
ELF: document some de-facto PT_* ABI quirks
Documentation: arm: remove stih415/stih416 related entries
docs: turn off "smart quotes" in the HTML build
Documentation: firmware: Clarify firmware path usage
docs/mm: Physical Memory: Fix grammar
Documentation: Add document for false sharing
dma-api-howto: typo fix
docs: move m68k architecture documentation under Documentation/arch/
docs: move parisc documentation under Documentation/arch/
docs: move ia64 architecture docs under Documentation/arch/
docs: Move arc architecture docs under Documentation/arch/
docs: move nios2 documentation under Documentation/arch/
docs: move openrisc documentation under Documentation/arch/
docs: move superh documentation under Documentation/arch/
...
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git://git.kernel.org/pub/scm/linux/kernel/git/jfern/linux
Pull RCU updates from Joel Fernandes:
- Updates and additions to MAINTAINERS files, with Boqun being added to
the RCU entry and Zqiang being added as an RCU reviewer.
I have also transitioned from reviewer to maintainer; however, Paul
will be taking over sending RCU pull-requests for the next merge
window.
- Resolution of hotplug warning in nohz code, achieved by fixing
cpu_is_hotpluggable() through interaction with the nohz subsystem.
Tick dependency modifications by Zqiang, focusing on fixing usage of
the TICK_DEP_BIT_RCU_EXP bitmask.
- Avoid needless calls to the rcu-lazy shrinker for CONFIG_RCU_LAZY=n
kernels, fixed by Zqiang.
- Improvements to rcu-tasks stall reporting by Neeraj.
- Initial renaming of k[v]free_rcu() to k[v]free_rcu_mightsleep() for
increased robustness, affecting several components like mac802154,
drbd, vmw_vmci, tracing, and more.
A report by Eric Dumazet showed that the API could be unknowingly
used in an atomic context, so we'd rather make sure they know what
they're asking for by being explicit:
https://lore.kernel.org/all/20221202052847.2623997-1-edumazet@google.com/
- Documentation updates, including corrections to spelling,
clarifications in comments, and improvements to the srcu_size_state
comments.
- Better srcu_struct cache locality for readers, by adjusting the size
of srcu_struct in support of SRCU usage by Christoph Hellwig.
- Teach lockdep to detect deadlocks between srcu_read_lock() vs
synchronize_srcu() contributed by Boqun.
Previously lockdep could not detect such deadlocks, now it can.
- Integration of rcutorture and rcu-related tools, targeted for v6.4
from Boqun's tree, featuring new SRCU deadlock scenarios, test_nmis
module parameter, and more
- Miscellaneous changes, various code cleanups and comment improvements
* tag 'rcu.6.4.april5.2023.3' of git://git.kernel.org/pub/scm/linux/kernel/git/jfern/linux: (71 commits)
checkpatch: Error out if deprecated RCU API used
mac802154: Rename kfree_rcu() to kvfree_rcu_mightsleep()
rcuscale: Rename kfree_rcu() to kfree_rcu_mightsleep()
ext4/super: Rename kfree_rcu() to kfree_rcu_mightsleep()
net/mlx5: Rename kfree_rcu() to kfree_rcu_mightsleep()
net/sysctl: Rename kvfree_rcu() to kvfree_rcu_mightsleep()
lib/test_vmalloc.c: Rename kvfree_rcu() to kvfree_rcu_mightsleep()
tracing: Rename kvfree_rcu() to kvfree_rcu_mightsleep()
misc: vmw_vmci: Rename kvfree_rcu() to kvfree_rcu_mightsleep()
drbd: Rename kvfree_rcu() to kvfree_rcu_mightsleep()
rcu: Protect rcu_print_task_exp_stall() ->exp_tasks access
rcu: Avoid stack overflow due to __rcu_irq_enter_check_tick() being kprobe-ed
rcu-tasks: Report stalls during synchronize_srcu() in rcu_tasks_postscan()
rcu: Permit start_poll_synchronize_rcu_expedited() to be invoked early
rcu: Remove never-set needwake assignment from rcu_report_qs_rdp()
rcu: Register rcu-lazy shrinker only for CONFIG_RCU_LAZY=y kernels
rcu: Fix missing TICK_DEP_MASK_RCU_EXP dependency check
rcu: Fix set/clear TICK_DEP_BIT_RCU_EXP bitmask race
rcu/trace: use strscpy() to instead of strncpy()
tick/nohz: Fix cpu_is_hotpluggable() by checking with nohz subsystem
...
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git://git.kernel.org/pub/scm/linux/kernel/git/jarkko/linux-tpmdd
Pull tpm updates from Jarkko Sakkinen:
- The .machine keyring, used for Machine Owner Keys (MOK), acquired the
ability to store only CA enforced keys, and put rest to the .platform
keyring, thus separating the code signing keys from the keys that are
used to sign certificates.
This essentially unlocks the use of the .machine keyring as a trust
anchor for IMA. It is an opt-in feature, meaning that the additional
contraints won't brick anyone who does not care about them.
- Enable interrupt based transactions with discrete TPM chips (tpm_tis).
There was code for this existing but it never really worked so I
consider this a new feature rather than a bug fix. Before the driver
just fell back to the polling mode.
Link: https://lore.kernel.org/linux-integrity/a93b6222-edda-d43c-f010-a59701f2aeef@gmx.de/
Link: https://lore.kernel.org/linux-integrity/20230302164652.83571-1-eric.snowberg@oracle.com/
* tag 'tpmdd-v6.4-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/jarkko/linux-tpmdd: (29 commits)
tpm: Add !tpm_amd_is_rng_defective() to the hwrng_unregister() call site
tpm_tis: fix stall after iowrite*()s
tpm/tpm_tis_synquacer: Convert to platform remove callback returning void
tpm/tpm_tis: Convert to platform remove callback returning void
tpm/tpm_ftpm_tee: Convert to platform remove callback returning void
tpm: tpm_tis_spi: Mark ACPI and OF related data as maybe unused
tpm: st33zp24: Mark ACPI and OF related data as maybe unused
tpm, tpm_tis: Enable interrupt test
tpm, tpm_tis: startup chip before testing for interrupts
tpm, tpm_tis: Claim locality when interrupts are reenabled on resume
tpm, tpm_tis: Claim locality in interrupt handler
tpm, tpm_tis: Request threaded interrupt handler
tpm, tpm: Implement usage counter for locality
tpm, tpm_tis: do not check for the active locality in interrupt handler
tpm, tpm_tis: Move interrupt mask checks into own function
tpm, tpm_tis: Only handle supported interrupts
tpm, tpm_tis: Claim locality before writing interrupt registers
tpm, tpm_tis: Do not skip reset of original interrupt vector
tpm, tpm_tis: Disable interrupts if tpm_tis_probe_irq() failed
tpm, tpm_tis: Claim locality before writing TPM_INT_ENABLE register
...
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Merge my x86 user copy updates branch.
This cleans up a lot of our x86 memory copy code, particularly for user
accesses. I've been pushing for microarchitectural support for good
memory copying and clearing for a long while, and it's been visible in
how the kernel has aggressively used 'rep movs' and 'rep stos' whenever
possible.
And that micro-architectural support has been improving over the years,
to the point where on modern CPU's the best option for a memory copy
that would become a function call (as opposed to being something that
can just be turned into individual 'mov' instructions) is now to inline
the string instruction sequence instead.
However, that only makes sense when we have the modern markers for this:
the x86 FSRM and FSRS capabilities ("Fast Short REP MOVS/STOS").
So this cleans up a lot of our historical code, gets rid of the legacy
marker use ("REP_GOOD" and "ERMS") from the memcpy/memset cases, and
replaces it with that modern reality. Note that REP_GOOD and ERMS end
up still being used by the known large cases (ie page copyin gand
clearing).
The reason much of this ends up being about user memory accesses is that
the normal in-kernel cases are done by the compiler (__builtin_memcpy()
and __builtin_memset()) and getting to the point where we can use our
instruction rewriting to inline those to be string instructions will
need some compiler support.
In contrast, the user accessor functions are all entirely controlled by
the kernel code, so we can change those arbitrarily.
Thanks to Borislav Petkov for feedback on the series, and Jens testing
some of this on micro-architectures I didn't personally have access to.
* x86-rep-insns:
x86: rewrite '__copy_user_nocache' function
x86: remove 'zerorest' argument from __copy_user_nocache()
x86: set FSRS automatically on AMD CPUs that have FSRM
x86: improve on the non-rep 'copy_user' function
x86: improve on the non-rep 'clear_user' function
x86: inline the 'rep movs' in user copies for the FSRM case
x86: move stac/clac from user copy routines into callers
x86: don't use REP_GOOD or ERMS for user memory clearing
x86: don't use REP_GOOD or ERMS for user memory copies
x86: don't use REP_GOOD or ERMS for small memory clearing
x86: don't use REP_GOOD or ERMS for small memory copies
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Pull ITER_UBUF updates from Jens Axboe:
"This turns singe vector imports into ITER_UBUF, rather than
ITER_IOVEC.
The former is more trivial to iterate and advance, and hence a bit
more efficient. From some very unscientific testing, ~60% of all iovec
imports are single vector"
* tag 'iter-ubuf.2-2023-04-21' of git://git.kernel.dk/linux:
iov_iter: Mark copy_compat_iovec_from_user() noinline
iov_iter: import single vector iovecs as ITER_UBUF
iov_iter: convert import_single_range() to ITER_UBUF
iov_iter: overlay struct iovec and ubuf/len
iov_iter: set nr_segs = 1 for ITER_UBUF
iov_iter: remove iov_iter_iovec()
iov_iter: add iter_iov_addr() and iter_iov_len() helpers
ALSA: pcm: check for user backed iterator, not specific iterator type
IB/qib: check for user backed iterator, not specific iterator type
IB/hfi1: check for user backed iterator, not specific iterator type
iov_iter: add iter_iovec() helper
block: ensure bio_alloc_map_data() deals with ITER_UBUF correctly
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The following crash was reported:
[ 1950.279393] list_del corruption, ffff99560d485790->next is NULL
[ 1950.279400] ------------[ cut here ]------------
[ 1950.279401] kernel BUG at lib/list_debug.c:49!
[ 1950.279405] invalid opcode: 0000 [#1] PREEMPT SMP NOPTI
[ 1950.279407] CPU: 11 PID: 5886 Comm: modprobe Tainted: G O 6.2.8_1 #1
[ 1950.279409] Hardware name: Gigabyte Technology Co., Ltd. B550M AORUS PRO-P/B550M AORUS PRO-P,
BIOS F15c 05/11/2022
[ 1950.279410] RIP: 0010:__list_del_entry_valid+0x59/0xc0
[ 1950.279415] Code: 48 8b 01 48 39 f8 75 5a 48 8b 72 08 48 39 c6 75 65 b8 01 00 00 00 c3 cc cc cc
cc 48 89 fe 48 c7 c7 08 a8 13 9e e8 b7 0a bc ff <0f> 0b 48 89 fe 48 c7 c7 38 a8 13 9e e8 a6 0a bc
ff 0f 0b 48 89 fe
[ 1950.279416] RSP: 0018:ffffa96d05647e08 EFLAGS: 00010246
[ 1950.279418] RAX: 0000000000000033 RBX: ffff99560d485750 RCX: 0000000000000000
[ 1950.279419] RDX: 0000000000000000 RSI: ffffffff9e107c59 RDI: 00000000ffffffff
[ 1950.279420] RBP: ffffffffc19c5168 R08: 0000000000000000 R09: ffffa96d05647cc8
[ 1950.279421] R10: 0000000000000003 R11: ffffffff9ea2a568 R12: 0000000000000000
[ 1950.279422] R13: ffff99560140a2e0 R14: ffff99560127d2e0 R15: 0000000000000000
[ 1950.279422] FS: 00007f67da795380(0000) GS:ffff995d1f0c0000(0000) knlGS:0000000000000000
[ 1950.279424] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 1950.279424] CR2: 00007f67da7e65c0 CR3: 00000001feed2000 CR4: 0000000000750ee0
[ 1950.279426] PKRU: 55555554
[ 1950.279426] Call Trace:
[ 1950.279428] <TASK>
[ 1950.279430] hwrng_unregister+0x28/0xe0 [rng_core]
[ 1950.279436] tpm_chip_unregister+0xd5/0xf0 [tpm]
Add the forgotten !tpm_amd_is_rng_defective() invariant to the
hwrng_unregister() call site inside tpm_chip_unregister().
Cc: stable@vger.kernel.org
Reported-by: Martin Dimov <martin@dmarto.com>
Link: https://lore.kernel.org/linux-integrity/3d1d7e9dbfb8c96125bc93b6b58b90a7@dmarto.com/
Fixes: f1324bbc4011 ("tpm: disable hwrng for fTPM on some AMD designs")
Fixes: b006c439d58d ("hwrng: core - start hwrng kthread also for untrusted sources")
Tested-by: Martin Dimov <martin@dmarto.com>
Signed-off-by: Jarkko Sakkinen <jarkko@kernel.org>
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ioread8() operations to TPM MMIO addresses can stall the CPU when
immediately following a sequence of iowrite*()'s to the same region.
For example, cyclitest measures ~400us latency spikes when a non-RT
usermode application communicates with an SPI-based TPM chip (Intel Atom
E3940 system, PREEMPT_RT kernel). The spikes are caused by a
stalling ioread8() operation following a sequence of 30+ iowrite8()s to
the same address. I believe this happens because the write sequence is
buffered (in CPU or somewhere along the bus), and gets flushed on the
first LOAD instruction (ioread*()) that follows.
The enclosed change appears to fix this issue: read the TPM chip's
access register (status code) after every iowrite*() operation to
amortize the cost of flushing data to chip across multiple instructions.
Signed-off-by: Haris Okanovic <haris.okanovic@ni.com>
Link: https://lore.kernel.org/r/20230323153436.B2SATnZV@linutronix.de
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Tested-by: Jarkko Sakkinen <jarkko@kernel.org>
Reviewed-by: Jarkko Sakkinen <jarkko@kernel.org>
Signed-off-by: Jarkko Sakkinen <jarkko@kernel.org>
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The .remove() callback for a platform driver returns an int which makes
many driver authors wrongly assume it's possible to do error handling by
returning an error code. However the value returned is (mostly) ignored
and this typically results in resource leaks. To improve here there is a
quest to make the remove callback return void. In the first step of this
quest all drivers are converted to .remove_new() which already returns
void.
Trivially convert this driver from always returning zero in the remove
callback to the void returning variant.
Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Reviewed-by: Jarkko Sakkinen <jarkko@kernel.org>
Signed-off-by: Jarkko Sakkinen <jarkko@kernel.org>
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The .remove() callback for a platform driver returns an int which makes
many driver authors wrongly assume it's possible to do error handling by
returning an error code. However the value returned is (mostly) ignored
and this typically results in resource leaks. To improve here there is a
quest to make the remove callback return void. In the first step of this
quest all drivers are converted to .remove_new() which already returns
void.
Trivially convert this driver from always returning zero in the remove
callback to the void returning variant.
Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Reviewed-by: Jarkko Sakkinen <jarkko@kernel.org>
Signed-off-by: Jarkko Sakkinen <jarkko@kernel.org>
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The .remove() callback for a platform driver returns an int which makes
many driver authors wrongly assume it's possible to do error handling by
returning an error code. However the value returned is (mostly) ignored
and this typically results in resource leaks. To improve here there is a
quest to make the remove callback return void. In the first step of this
quest all drivers are converted to .remove_new() which already returns
void.
ftpm_tee_remove() returns zero unconditionally (and cannot easily
converted to return void). So ignore the return value to be able to make
ftpm_plat_tee_remove() return void.
Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Reviewed-by: Jarkko Sakkinen <jarkko@kernel.org>
Signed-off-by: Jarkko Sakkinen <jarkko@kernel.org>
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The driver can be compile tested with !CONFIG_OF or !CONFIG_ACPI making
unused:
drivers/char/tpm/tpm_tis_spi_main.c:234:34: error: ‘of_tis_spi_match’ defined but not used [-Werror=unused-const-variable=]
Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Signed-off-by: Jarkko Sakkinen <jarkko@kernel.org>
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The driver can be compile tested with !CONFIG_OF or !CONFIG_ACPI making
drivers/char/tpm/st33zp24/i2c.c:141:34: error: ‘of_st33zp24_i2c_match’ defined but not used [-Werror=unused-const-variable=]
drivers/char/tpm/st33zp24/spi.c:258:34: error: ‘of_st33zp24_spi_match’ defined but not used [-Werror=unused-const-variable=]
Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Signed-off-by: Jarkko Sakkinen <jarkko@kernel.org>
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The test for interrupts in tpm_tis_send() is skipped if the flag
TPM_CHIP_FLAG_IRQ is not set. Since the current code never sets the flag
initially the test is never executed.
Fix this by setting the flag in tpm_tis_gen_interrupt() right after
interrupts have been enabled and before the test is executed.
Signed-off-by: Lino Sanfilippo <l.sanfilippo@kunbus.com>
Tested-by: Michael Niewöhner <linux@mniewoehner.de>
Tested-by: Jarkko Sakkinen <jarkko@kernel.org>
Reviewed-by: Jarkko Sakkinen <jarkko@kernel.org>
Signed-off-by: Jarkko Sakkinen <jarkko@kernel.org>
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In tpm_tis_gen_interrupt() a request for a property value is sent to the
TPM to test if interrupts are generated. However after a power cycle the
TPM responds with TPM_RC_INITIALIZE which indicates that the TPM is not
yet properly initialized.
Fix this by first starting the TPM up before the request is sent. For this
the startup implementation is removed from tpm_chip_register() and put
into the new function tpm_chip_startup() which is called before the
interrupts are tested.
Signed-off-by: Lino Sanfilippo <l.sanfilippo@kunbus.com>
Tested-by: Jarkko Sakkinen <jarkko@kernel.org>
Reviewed-by: Jarkko Sakkinen <jarkko@kernel.org>
Signed-off-by: Jarkko Sakkinen <jarkko@kernel.org>
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In tpm_tis_resume() make sure that the locality has been claimed when
tpm_tis_reenable_interrupts() is called. Otherwise the writings to the
register might not have any effect.
Fixes: 45baa1d1fa39 ("tpm_tis: Re-enable interrupts upon (S3) resume")
Signed-off-by: Lino Sanfilippo <l.sanfilippo@kunbus.com>
Tested-by: Jarkko Sakkinen <jarkko@kernel.org>
Reviewed-by: Jarkko Sakkinen <jarkko@kernel.org>
Signed-off-by: Jarkko Sakkinen <jarkko@kernel.org>
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Writing the TPM_INT_STATUS register in the interrupt handler to clear the
interrupts only has effect if a locality is held. Since this is not
guaranteed at the time the interrupt is fired, claim the locality
explicitly in the handler.
Signed-off-by: Lino Sanfilippo <l.sanfilippo@kunbus.com>
Tested-by: Michael Niewöhner <linux@mniewoehner.de>
Tested-by: Jarkko Sakkinen <jarkko@kernel.org>
Reviewed-by: Jarkko Sakkinen <jarkko@kernel.org>
Signed-off-by: Jarkko Sakkinen <jarkko@kernel.org>
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The TIS interrupt handler at least has to read and write the interrupt
status register. In case of SPI both operations result in a call to
tpm_tis_spi_transfer() which uses the bus_lock_mutex of the spi device
and thus must only be called from a sleepable context.
To ensure this request a threaded interrupt handler.
Signed-off-by: Lino Sanfilippo <l.sanfilippo@kunbus.com>
Tested-by: Michael Niewöhner <linux@mniewoehner.de>
Tested-by: Jarkko Sakkinen <jarkko@kernel.org>
Reviewed-by: Jarkko Sakkinen <jarkko@kernel.org>
Signed-off-by: Jarkko Sakkinen <jarkko@kernel.org>
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Implement a usage counter for the (default) locality used by the TPM TIS
driver:
Request the locality from the TPM if it has not been claimed yet, otherwise
only increment the counter. Also release the locality if the counter is 0
otherwise only decrement the counter. Since in case of SPI the register
accesses are locked by means of the SPI bus mutex use a sleepable lock
(i.e. also a mutex) to ensure thread-safety of the counter which may be
accessed by both a userspace thread and the interrupt handler.
By doing this refactor the names of the amended functions to use a more
appropriate prefix.
Signed-off-by: Lino Sanfilippo <l.sanfilippo@kunbus.com>
Tested-by: Michael Niewöhner <linux@mniewoehner.de>
Tested-by: Jarkko Sakkinen <jarkko@kernel.org>
Reviewed-by: Jarkko Sakkinen <jarkko@kernel.org>
Signed-off-by: Jarkko Sakkinen <jarkko@kernel.org>
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After driver initialization tpm_tis_data->locality may only be modified in
case of a LOCALITY CHANGE interrupt. In this case the interrupt handler
iterates over all localities only to assign the active one to
tpm_tis_data->locality.
However this information is never used any more, so the assignment is not
needed.
Furthermore without the assignment tpm_tis_data->locality cannot change any
more at driver runtime, and thus no protection against concurrent
modification is required when the variable is read at other places.
So remove this iteration entirely.
Signed-off-by: Lino Sanfilippo <l.sanfilippo@kunbus.com>
Tested-by: Jarkko Sakkinen <jarkko@kernel.org>
Reviewed-by: Jarkko Sakkinen <jarkko@kernel.org>
Signed-off-by: Jarkko Sakkinen <jarkko@kernel.org>
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Clean up wait_for_tpm_stat() by moving multiple similar interrupt mask
checks into an own function.
Signed-off-by: Lino Sanfilippo <l.sanfilippo@kunbus.com>
Suggested-by: Jarkko Sakkinen <jarkko@kernel.org>
Reviewed-by: Jarkko Sakkinen <jarkko@kernel.org>
Signed-off-by: Jarkko Sakkinen <jarkko@kernel.org>
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According to the TPM Interface Specification (TIS) support for "stsValid"
and "commandReady" interrupts is only optional.
This has to be taken into account when handling the interrupts in functions
like wait_for_tpm_stat(). To determine the supported interrupts use the
capability query.
Also adjust wait_for_tpm_stat() to only wait for interrupt reported status
changes. After that process all the remaining status changes by polling
the status register.
Signed-off-by: Lino Sanfilippo <l.sanfilippo@kunbus.com>
Tested-by: Michael Niewöhner <linux@mniewoehner.de>
Tested-by: Jarkko Sakkinen <jarkko@kernel.org>
Reviewed-by: Jarkko Sakkinen <jarkko@kernel.org>
Signed-off-by: Jarkko Sakkinen <jarkko@kernel.org>
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In tpm_tis_probe_single_irq() interrupt registers TPM_INT_VECTOR,
TPM_INT_STATUS and TPM_INT_ENABLE are modified to setup the interrupts.
Currently these modifications are done without holding a locality thus they
have no effect. Fix this by claiming the (default) locality before the
registers are written.
Since now tpm_tis_gen_interrupt() is called with the locality already
claimed remove locality request and release from this function.
Signed-off-by: Lino Sanfilippo <l.sanfilippo@kunbus.com>
Tested-by: Jarkko Sakkinen <jarkko@kernel.org>
Reviewed-by: Jarkko Sakkinen <jarkko@kernel.org>
Signed-off-by: Jarkko Sakkinen <jarkko@kernel.org>
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If in tpm_tis_probe_irq_single() an error occurs after the original
interrupt vector has been read, restore the interrupts before the error is
returned.
Since the caller does not check the error value, return -1 in any case that
the TPM_CHIP_FLAG_IRQ flag is not set. Since the return value of function
tpm_tis_gen_interrupt() is not longer used, make it a void function.
Fixes: 1107d065fdf1 ("tpm_tis: Introduce intermediate layer for TPM access")
Signed-off-by: Lino Sanfilippo <l.sanfilippo@kunbus.com>
Tested-by: Jarkko Sakkinen <jarkko@kernel.org>
Reviewed-by: Jarkko Sakkinen <jarkko@kernel.org>
Signed-off-by: Jarkko Sakkinen <jarkko@kernel.org>
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Both functions tpm_tis_probe_irq_single() and tpm_tis_probe_irq() may setup
the interrupts and then return with an error. This case is indicated by a
missing TPM_CHIP_FLAG_IRQ flag in chip->flags.
Currently the interrupt setup is only undone if tpm_tis_probe_irq_single()
fails. Undo the setup also if tpm_tis_probe_irq() fails.
Signed-off-by: Lino Sanfilippo <l.sanfilippo@kunbus.com>
Tested-by: Michael Niewöhner <linux@mniewoehner.de>
Tested-by: Jarkko Sakkinen <jarkko@kernel.org>
Reviewed-by: Jarkko Sakkinen <jarkko@kernel.org>
Signed-off-by: Jarkko Sakkinen <jarkko@kernel.org>
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In disable_interrupts() the TPM_GLOBAL_INT_ENABLE bit is unset in the
TPM_INT_ENABLE register to shut the interrupts off. However modifying the
register is only possible with a held locality. So claim the locality
before disable_interrupts() is called.
Signed-off-by: Lino Sanfilippo <l.sanfilippo@kunbus.com>
Tested-by: Michael Niewöhner <linux@mniewoehner.de>
Tested-by: Jarkko Sakkinen <jarkko@kernel.org>
Reviewed-by: Jarkko Sakkinen <jarkko@kernel.org>
Signed-off-by: Jarkko Sakkinen <jarkko@kernel.org>
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The interrupt handler that sets the boolean variable irq_tested may run on
another CPU as the thread that checks irq_tested as part of the irq test in
tpm_tis_send().
Since nothing guarantees cache coherency between CPUs for unsynchronized
accesses to boolean variables the testing thread might not perceive the
value change done in the interrupt handler.
Avoid this issue by setting the bit TPM_TIS_IRQ_TESTED in the flags field
of the tpm_tis_data struct and by accessing this field with the bit
manipulating functions that provide cache coherency.
Also convert all other existing sites to use the proper macros when
accessing this bitfield.
Signed-off-by: Lino Sanfilippo <l.sanfilippo@kunbus.com>
Tested-by: Michael Niewöhner <linux@mniewoehner.de>
Tested-by: Jarkko Sakkinen <jarkko@kernel.org>
Reviewed-by: Jarkko Sakkinen <jarkko@kernel.org>
Signed-off-by: Jarkko Sakkinen <jarkko@kernel.org>
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Pointer variables of void * type do not require type cast.
Signed-off-by: Yu Zhe <yuzhe@nfschina.com>
Reviewed-by: Jarkko Sakkinen <jarkko@kernel.org>
Signed-off-by: Jarkko Sakkinen <jarkko@kernel.org>
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When waiting for a tpm ready completion, the cr50 i2c driver incorrectly
assumes that the value of timeout_a is represented in milliseconds
instead of jiffies.
Remove the msecs_to_jiffies conversion.
Signed-off-by: Mark Hasemeyer <markhas@chromium.org>
Reviewed-by: Jarkko Sakkinen <jarkko@kernel.org>
Signed-off-by: Jarkko Sakkinen <jarkko@kernel.org>
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git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull irq fix from Borislav Petkov:
- Remove an over-zealous sanity check of the array of MSI-X vectors to
be allocated for a device
* tag 'irq_urgent_for_v6.3' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
PCI/MSI: Remove over-zealous hardware size check in pci_msix_validate_entries()
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git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input
Pull input fixes from Dmitry Torokhov:
- a check in pegasus-notetaker driver to validate the type of pipe when
probing a new device
- a fix for Cypress touch controller to correctly parse maximum number
of touches.
* tag 'input-for-v6.3-rc7' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input:
Input: cyttsp5 - fix sensing configuration data structure
Input: pegasus-notetaker - check pipe type when probing
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This reverts commit 5c62d5aab8752e5ee7bfbe75ed6060db1c787f98.
This broke wake-on-lan for multiple people, and for much too long.
Link: https://bugzilla.kernel.org/show_bug.cgi?id=217069
Link: https://lore.kernel.org/all/754225a2-95a9-2c36-1886-7da1a78308c2@loongson.cn/
Link: https://github.com/acpica/acpica/pull/866
Cc: Rafael J. Wysocki <rafael@kernel.org>
Cc: Jianmin Lv <lvjianmin@loongson.cn>
Cc: Huacai Chen <chenhuacai@loongson.cn>
Cc: Bob Moore <robert.moore@intel.com>
Cc: stable@kernel.org # 6.2
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc
Pull char/misc driver fixes from Greg KH:
"Here are some last-minute tiny driver fixes for 6.3-final. They
include fixes for some fpga and iio drivers:
- fpga bridge driver fix
- fpga dfl error reporting fix
- fpga m10bmc driver fix
- fpga xilinx driver fix
- iio light driver fix
- iio dac fwhandle leak fix
- iio adc driver fix
All of these have been in linux-next for a few weeks with no reported
problems"
* tag 'char-misc-6.3-final' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc:
iio: light: tsl2772: fix reading proximity-diodes from device tree
fpga: bridge: properly initialize bridge device before populating children
iio: dac: ad5755: Add missing fwnode_handle_put()
iio: adc: at91-sama5d2_adc: fix an error code in at91_adc_allocate_trigger()
fpga: xilinx-pr-decoupler: Use readl wrapper instead of pure readl
fpga: dfl-pci: Drop redundant pci_enable_pcie_error_reporting()
fpga: m10bmc-sec: Fix rsu_send_data() to return FW_UPLOAD_ERR_HW_ERROR
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git://git.kernel.org/pub/scm/linux/kernel/git/brgl/linux
Pull gpio fixes from Bartosz Golaszewski:
- use raw_spinlocks in regmaps that are used in interrupt context in
gpio-104-idi-48 and gpio-104-dio-48e
* tag 'gpio-fixes-for-v6.3' of git://git.kernel.org/pub/scm/linux/kernel/git/brgl/linux:
gpio: 104-idi-48: Enable use_raw_spinlock for idi48_regmap_config
gpio: 104-dio-48e: Enable use_raw_spinlock for dio48e_regmap_config
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Pull drm fixes from Dave Airlie:
"This is the regular and hopefully last round of fixes for 6.3.
Pretty small, a few amdgpu, one i915, one nouveau, one rockchip and
one gpu scheduler fix:
nouveau:
- fix dma-resv timeout
rockchip:
- fix suspend/resume
sched:
- fix timeout handling
i915:
- Fix fast wake AUX sync len
amdgpu:
- GPU reset fix
- DCN 3.1.5 line buffer fix
- Display fix for single channel memory configs
- Fix a possible divide by 0"
* tag 'drm-fixes-2023-04-21' of git://anongit.freedesktop.org/drm/drm:
drm/amd/display: fix a divided-by-zero error
drm/amd/display: limit timing for single dimm memory
drm/amd/display: set dcn315 lb bpp to 48
drm/amdgpu: Fix desktop freezed after gpu-reset
drm/rockchip: vop2: Use regcache_sync() to fix suspend/resume
drm/nouveau: fix incorrect conversion to dma_resv_wait_timeout()
drm/rockchip: vop2: fix suspend/resume
drm/i915: Fix fast wake AUX sync len
drm/sched: Check scheduler ready before calling timeout handling
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https://gitlab.freedesktop.org/agd5f/linux into drm-fixes
amd-drm-fixes-6.3-2023-04-19:
amdgpu:
- GPU reset fix
- DCN 3.1.5 line buffer fix
- Display fix for single channel memory configs
- Fix a possible divide by 0
Signed-off-by: Dave Airlie <airlied@redhat.com>
From: Alex Deucher <alexander.deucher@amd.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20230420031717.7790-1-alexander.deucher@amd.com
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git://anongit.freedesktop.org/drm/drm-intel into drm-fixes
drm/i915 fixes for v6.3 final:
- Fix fast wake AUX sync len
Signed-off-by: Dave Airlie <airlied@redhat.com>
From: Jani Nikula <jani.nikula@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/87354w1b76.fsf@intel.com
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git://anongit.freedesktop.org/drm/drm-misc into drm-fixes
Short summary of fixes pull:
* nouveau: fix dma-resv timeout
* rockchip: fix suspend/resume
* sched: fix timeout handling
Signed-off-by: Dave Airlie <airlied@redhat.com>
From: Thomas Zimmermann <tzimmermann@suse.de>
Link: https://patchwork.freedesktop.org/patch/msgid/20230420083114.GA17651@linux-uq9g
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git://git.kernel.org/pub/scm/linux/kernel/git/pci/pci
Pull pci fix from Bjorn Helgaas:
- Previously we ignored PCI devices if the DT "status" property or the
ACPI _STA method said it was not present.
Per spec, _STA cannot be used for that purpose, and using it that way
caused regressions, so skip the _STA check (Rob Herring)
* tag 'pci-v6.3-fixes-3' of git://git.kernel.org/pub/scm/linux/kernel/git/pci/pci:
PCI: Restrict device disabled status check to DT
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ath9k_mci_update_wlan_channels()
This partially reverts commit e161d4b60ae3a5356e07202e0bfedb5fad82c6aa.
Turns out the channelmap variable is not actually read-only, it's modified
through the MCI_GPM_CLR_CHANNEL_BIT() macro further down in the function,
so making it read-only causes page faults when that code is hit.
Link: https://bugzilla.kernel.org/show_bug.cgi?id=217183
Link: https://lore.kernel.org/r/20230413214118.153781-1-toke@toke.dk
Fixes: e161d4b60ae3 ("wifi: ath9k: Make arrays prof_prio and channelmap static const")
Cc: stable@vger.kernel.org
Signed-off-by: Toke Høiland-Jørgensen <toke@toke.dk>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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Commit 6fffbc7ae137 ("PCI: Honor firmware's device disabled status")
checked the firmware device status for both DT and ACPI devices. That
caused a regression in some ACPI systems. The exact reason isn't clear.
It's possibly a firmware bug. For now, at least, refactor the check to
be for DT based systems only.
Note that the original implementation leaked a refcount which is now
correctly handled.
[bhelgaas: Per ACPI r6.5, sec 6.3.7, for devices on an enumerable bus, _STA
must return with bit[0] ("device is present") set]
Link: https://lore.kernel.org/all/m2fs9lgndw.fsf@gmail.com/
Fixes: 6fffbc7ae137 ("PCI: Honor firmware's device disabled status")
Link: https://lore.kernel.org/r/20230419193513.708818-1-robh@kernel.org
Link: https://bugzilla.kernel.org/show_bug.cgi?id=217317
Reported-by: Donald Hunter <donald.hunter@gmail.com>
Reported-by: Vitaly Kuznetsov <vkuznets@redhat.com>
Tested-by: Donald Hunter <donald.hunter@gmail.com>
Tested-by: Vitaly Kuznetsov <vkuznets@redhat.com>
Signed-off-by: Rob Herring <robh@kernel.org>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Cc: Binbin Zhou <zhoubinbin@loongson.cn>
Cc: Liu Peibao <liupeibao@loongson.cn>
Cc: Huacai Chen <chenhuacai@loongson.cn>
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git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net
Pull networking fixes from Paolo Abeni:
"Including fixes from netfilter and bpf.
There are a few fixes for new code bugs, including the Mellanox one
noted in the last networking pull. No known regressions outstanding.
Current release - regressions:
- sched: clear actions pointer in miss cookie init fail
- mptcp: fix accept vs worker race
- bpf: fix bpf_arch_text_poke() with new_addr == NULL on s390
- eth: bnxt_en: fix a possible NULL pointer dereference in unload
path
- eth: veth: take into account peer device for
NETDEV_XDP_ACT_NDO_XMIT xdp_features flag
Current release - new code bugs:
- eth: revert "net/mlx5: Enable management PF initialization"
Previous releases - regressions:
- netfilter: fix recent physdev match breakage
- bpf: fix incorrect verifier pruning due to missing register
precision taints
- eth: virtio_net: fix overflow inside xdp_linearize_page()
- eth: cxgb4: fix use after free bugs caused by circular dependency
problem
- eth: mlxsw: pci: fix possible crash during initialization
Previous releases - always broken:
- sched: sch_qfq: prevent slab-out-of-bounds in qfq_activate_agg
- netfilter: validate catch-all set elements
- bridge: don't notify FDB entries with "master dynamic"
- eth: bonding: fix memory leak when changing bond type to ethernet
- eth: i40e: fix accessing vsi->active_filters without holding lock
Misc:
- Mat is back as MPTCP co-maintainer"
* tag 'net-6.3-rc8' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net: (33 commits)
net: bridge: switchdev: don't notify FDB entries with "master dynamic"
Revert "net/mlx5: Enable management PF initialization"
MAINTAINERS: Resume MPTCP co-maintainer role
mailmap: add entries for Mat Martineau
e1000e: Disable TSO on i219-LM card to increase speed
bnxt_en: fix free-runnig PHC mode
net: dsa: microchip: ksz8795: Correctly handle huge frame configuration
bpf: Fix incorrect verifier pruning due to missing register precision taints
hamradio: drop ISA_DMA_API dependency
mlxsw: pci: Fix possible crash during initialization
mptcp: fix accept vs worker race
mptcp: stops worker on unaccepted sockets at listener close
net: rpl: fix rpl header size calculation
net: vmxnet3: Fix NULL pointer dereference in vmxnet3_rq_rx_complete()
bonding: Fix memory leak when changing bond type to Ethernet
veth: take into account peer device for NETDEV_XDP_ACT_NDO_XMIT xdp_features flag
mlxfw: fix null-ptr-deref in mlxfw_mfa2_tlv_next()
bnxt_en: Fix a possible NULL pointer dereference in unload path
bnxt_en: Do not initialize PTP on older P3/P4 chips
netfilter: nf_tables: tighten netlink attribute requirements for catch-all elements
...
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Every caller passes in zero, meaning they don't want any partial copy to
zero the remainder of the destination buffer.
Which is just as well, because the implementation of that function
didn't actually even look at that argument, and wasn't even aware it
existed, although some misleading comments did mention it still.
The 'zerorest' thing is a historical artifact of how "copy_from_user()"
worked, in that it would zero the rest of the kernel buffer that it
copied into.
That zeroing still exists, but it's long since been moved to generic
code, and the raw architecture-specific code doesn't do it. See
_copy_from_user() in lib/usercopy.c for this all.
However, while __copy_user_nocache() shares some history and superficial
other similarities with copy_from_user(), it is in many ways also very
different.
In particular, while the code makes it *look* similar to the generic
user copy functions that can copy both to and from user space, and take
faults on both reads and writes as a result, __copy_user_nocache() does
no such thing at all.
__copy_user_nocache() always copies to kernel space, and will never take
a page fault on the destination. What *can* happen, though, is that the
non-temporal stores take a machine check because one of the use cases is
for writing to stable memory, and any memory errors would then take
synchronous faults.
So __copy_user_nocache() does look a lot like copy_from_user(), but has
faulting behavior that is more akin to our old copy_in_user() (which no
longer exists, but copied from user space to user space and could fault
on both source and destination).
And it very much does not have the "zero the end of the destination
buffer", since a problem with the destination buffer is very possibly
the very source of the partial copy.
So this whole thing was just a confusing historical artifact from having
shared some code with a completely different function with completely
different use cases.
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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This reverts commit fe998a3c77b9f989a30a2a01fb00d3729a6d53a4.
Paul reports that it causes a regression with IB on CX4
and FW 12.18.1000. In addition I think that the concept
of "management PF" is not fully accepted and requires
a discussion.
Fixes: fe998a3c77b9 ("net/mlx5: Enable management PF initialization")
Reported-by: Paul Moore <paul@paul-moore.com>
Link: https://lore.kernel.org/all/CAHC9VhQ7A4+msL38WpbOMYjAqLp0EtOjeLh4Dc6SQtD6OUvCQg@mail.gmail.com/
Link: https://lore.kernel.org/r/20230413222547.56901-1-kuba@kernel.org
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
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https://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf
Daniel Borkmann says:
====================
bpf 2023-04-19
We've added 3 non-merge commits during the last 6 day(s) which contain
a total of 3 files changed, 34 insertions(+), 9 deletions(-).
The main changes are:
1) Fix a crash on s390's bpf_arch_text_poke() under a NULL new_addr,
from Ilya Leoshkevich.
2) Fix a bug in BPF verifier's precision tracker, from Daniel Borkmann
and Andrii Nakryiko.
3) Fix a regression in veth's xdp_features which led to a broken BPF CI
selftest, from Lorenzo Bianconi.
* tag 'for-netdev' of https://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf:
bpf: Fix incorrect verifier pruning due to missing register precision taints
veth: take into account peer device for NETDEV_XDP_ACT_NDO_XMIT xdp_features flag
s390/bpf: Fix bpf_arch_text_poke() with new_addr == NULL
====================
Link: https://lore.kernel.org/r/20230419195847.27060-1-daniel@iogearbox.net
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
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git://git.kernel.org/pub/scm/linux/kernel/git/tnguy/net-queue
Tony Nguyen says:
====================
Intel Wired LAN Driver Updates 2023-04-17 (i40e)
This series contains updates to i40e only.
Alex moves setting of active filters to occur under lock and checks/takes
error path in rebuild if re-initializing the misc interrupt vector
failed.
* '40GbE' of git://git.kernel.org/pub/scm/linux/kernel/git/tnguy/net-queue:
i40e: fix i40e_setup_misc_vector() error handling
i40e: fix accessing vsi->active_filters without holding lock
====================
Reviewed-by: Simon Horman <simon.horman@corigine.com>
Link: https://lore.kernel.org/r/20230417205245.1030733-1-anthony.l.nguyen@intel.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
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While using i219-LM card currently it was only possible to achieve
about 60% of maximum speed due to regression introduced in Linux 5.8.
This was caused by TSO not being disabled by default despite commit
f29801030ac6 ("e1000e: Disable TSO for buffer overrun workaround").
Fix that by disabling TSO during driver probe.
Fixes: f29801030ac6 ("e1000e: Disable TSO for buffer overrun workaround")
Signed-off-by: Sebastian Basierski <sebastianx.basierski@intel.com>
Signed-off-by: Mateusz Palczewski <mateusz.palczewski@intel.com>
Tested-by: Naama Meir <naamax.meir@linux.intel.com>
Signed-off-by: Tony Nguyen <anthony.l.nguyen@intel.com>
Reviewed-by: Simon Horman <simon.horman@corigine.com>
Link: https://lore.kernel.org/r/20230417205345.1030801-1-anthony.l.nguyen@intel.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
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The patch in fixes changed the way real-time mode is chosen for PHC on
the NIC. Apparently there is one more use case of the check outside of
ptp part of the driver which was not converted to the new macro and is
making a lot of noise in free-running mode.
Fixes: 131db4991622 ("bnxt_en: reset PHC frequency in free-running mode")
Signed-off-by: Vadim Fedorenko <vadfed@meta.com>
Reviewed-by: Michael Chan <michael.chan@broadcom.com>
Reviewed-by: Pavan Chebbi <pavan.chebbi@broadcom.com>
Link: https://lore.kernel.org/r/20230418202511.1544735-1-vadfed@meta.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
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git://git.kernel.org/pub/scm/linux/kernel/git/broonie/spi
Pull spi fix from Mark Brown:
"A small fix in the error handling for the rockchip driver, ensuring we
don't leak clock enables if we fail to request the interrupt for the
device"
* tag 'spi-fix-v6.3-rc7' of git://git.kernel.org/pub/scm/linux/kernel/git/broonie/spi:
spi: spi-rockchip: Fix missing unwind goto in rockchip_sfc_probe()
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git://git.kernel.org/pub/scm/linux/kernel/git/broonie/regulator
Pull regulator fixes from Mark Brown:
"A few driver specific fixes, one build coverage issue and a couple of
'someone typed in the wrong number' style errors in describing devices
to the subsystem"
* tag 'regulator-fix-v6.3-rc7' of git://git.kernel.org/pub/scm/linux/kernel/git/broonie/regulator:
regulator: sm5703: Fix missing n_voltages for fixed regulators
regulator: fan53555: Fix wrong TCS_SLEW_MASK
regulator: fan53555: Explicitly include bits header
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