Merge tag 'bpf-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf

Pull bpf fixes from Alexei Starovoitov:

- Fix alignment of arm64 JIT buffer to prevent atomic tearing (Fuad
Tabba)

Merge tag 'bpf-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf

Pull bpf fixes from Alexei Starovoitov:

- Fix alignment of arm64 JIT buffer to prevent atomic tearing (Fuad
Tabba)

- Fix invariant violation for single value tnums in the verifier
(Harishankar Vishwanathan, Paul Chaignon)

- Fix a bunch of issues found by ASAN in selftests/bpf (Ihor Solodrai)

- Fix race in devmpa and cpumap on PREEMPT_RT (Jiayuan Chen)

- Fix show_fdinfo of kprobe_multi when cookies are not present (Jiri
Olsa)

- Fix race in freeing special fields in BPF maps to prevent memory
leaks (Kumar Kartikeya Dwivedi)

- Fix OOB read in dmabuf_collector (T.J. Mercier)

* tag 'bpf-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf: (36 commits)
selftests/bpf: Avoid simplification of crafted bounds test
selftests/bpf: Test refinement of single-value tnum
bpf: Improve bounds when tnum has a single possible value
bpf: Introduce tnum_step to step through tnum's members
bpf: Fix race in devmap on PREEMPT_RT
bpf: Fix race in cpumap on PREEMPT_RT
selftests/bpf: Add tests for special fields races
bpf: Retire rcu_trace_implies_rcu_gp() from local storage
bpf: Delay freeing fields in local storage
bpf: Lose const-ness of map in map_check_btf()
bpf: Register dtor for freeing special fields
selftests/bpf: Fix OOB read in dmabuf_collector
selftests/bpf: Fix a memory leak in xdp_flowtable test
bpf: Fix stack-out-of-bounds write in devmap
bpf: Fix kprobe_multi cookies access in show_fdinfo callback
bpf, arm64: Force 8-byte alignment for JIT buffer to prevent atomic tearing
selftests/bpf: Don't override SIGSEGV handler with ASAN
selftests/bpf: Check BPFTOOL env var in detect_bpftool_path()
selftests/bpf: Fix out-of-bounds array access bugs reported by ASAN
selftests/bpf: Fix array bounds warning in jit_disasm_helpers
...

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Merge branch 'selftests-bpf-fixes-for-userspace-asan'

Ihor Solodrai says:

====================
selftests/bpf: Fixes for userspace ASAN

This series includes various fixes aiming to enable test_prog

Merge branch 'selftests-bpf-fixes-for-userspace-asan'

Ihor Solodrai says:

====================
selftests/bpf: Fixes for userspace ASAN

This series includes various fixes aiming to enable test_progs run
with userspace address sanitizer on BPF CI.

The first five patches add a simplified implementation of strscpy() to
selftests/bpf and then replace strcpy/strncpy usages across the tests
with it. See relevant discussions [1][2].

Patch #6 fixes the selftests/bpf/test_progs build with:

SAN_CFLAGS="-fsanitize=address -fno-omit-frame-pointer"

The subsequent patches fix bugs reported by the address sanitizer on
attempt to run the tests.

[1] https://lore.kernel.org/bpf/CAADnVQ+9uw2_o388j43EWiAPdMB=3FLx2jq-9zRSvqrv-wgRag@mail.gmail.com/
[2] https://lore.kernel.org/bpf/20260220182011.802116-1-ihor.solodrai@linux.dev/
---

v3->v4:
- combine strscpy and ASAN series into one (Alexei)
- make the count arg of strscpy() optional via macro and fixup
relevant call sites (Alexei)
- remove strscpy_cat() from this series (Alexei)

v3: https://lore.kernel.org/bpf/20260220222604.1155148-1-ihor.solodrai@linux.dev/

v2->v3:
- rebase on top of "selftests/bpf: Add and use strscpy()"
- https://lore.kernel.org/bpf/20260220182011.802116-1-ihor.solodrai@linux.dev/
- uprobe_multi_test.c: memset static struct child at the beginning
of a test *and* zero out child->thread in release_child (patch #9,
Mykyta)
- nits in test_sysctl.c (patch #11, Eduard)
- bpftool_helpers.c: update to use strscpy (patch #14, Alexei)
- add __asan_on_error handler to still dump test logs even with ASAN
build (patch #15, Mykyta)

v2: https://lore.kernel.org/bpf/20260218003041.1156774-1-ihor.solodrai@linux.dev/

v1->v2:
- rebase on bpf (v1 was targeting bpf-next)
- add ASAN flag handling in selftests/bpf/Makefile (Eduard)
- don't override SIGSEGV handler in test_progs with ASAN (Eduard)
- add error messages in detect_bpftool_path (Mykyta)
- various nits (Eduard, Jiri, Mykyta, Alexis)

v1: https://lore.kernel.org/bpf/20260212011356.3266753-1-ihor.solodrai@linux.dev/
====================

Link: https://patch.msgid.link/20260223190736.649171-1-ihor.solodrai@linux.dev
Signed-off-by: Alexei Starovoitov <ast@kernel.org>

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selftests/bpf: Pass through build flags to bpftool and resolve_btfids

EXTRA_* and SAN_* build flags were not correctly propagated to bpftool
and resolve_btids when building selftests/bpf. This led t

selftests/bpf: Pass through build flags to bpftool and resolve_btfids

EXTRA_* and SAN_* build flags were not correctly propagated to bpftool
and resolve_btids when building selftests/bpf. This led to various
build errors on attempt to build with SAN_CFLAGS="-fsanitize=address",
for example.

Fix the makefiles to address this:
- Pass SAN_CFLAGS/SAN_LDFLAGS to bpftool and resolve_btfids build
- Propagate EXTRA_LDFLAGS to resolve_btfids link command
- Use pkg-config to detect zlib and zstd for resolve_btfids, similar
libelf handling

Also check for ASAN flag in selftests/bpf/Makefile for convenience.

Signed-off-by: Ihor Solodrai <ihor.solodrai@linux.dev>
Link: https://lore.kernel.org/r/20260223190736.649171-7-ihor.solodrai@linux.dev
Signed-off-by: Alexei Starovoitov <ast@kernel.org>

show more ...

Merge drm/drm-fixes into drm-misc-fixes

7.0-rc1 was just released, let's merge it to kick the new release cycle.

Signed-off-by: Maxime Ripard <mripard@kernel.org>

Merge tag 'bpf-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf

Pull bpf fixes from Alexei Starovoitov:

- Fix invalid write loop logic in libbpf's bpf_linker__add_buf() (Amery
Hu

Merge tag 'bpf-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf

Pull bpf fixes from Alexei Starovoitov:

- Fix invalid write loop logic in libbpf's bpf_linker__add_buf() (Amery
Hung)

- Fix a potential use-after-free of BTF object (Anton Protopopov)

- Add feature detection to libbpf and avoid moving arena global
variables on older kernels (Emil Tsalapatis)

- Remove extern declaration of bpf_stream_vprintk() from libbpf headers
(Ihor Solodrai)

- Fix truncated netlink dumps in bpftool (Jakub Kicinski)

- Fix map_kptr grace period wait in bpf selftests (Kumar Kartikeya
Dwivedi)

- Remove hexdump dependency while building bpf selftests (Matthieu
Baerts)

- Complete fsession support in BPF trampolines on riscv (Menglong Dong)

* tag 'bpf-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf:
selftests/bpf: Remove hexdump dependency
libbpf: Remove extern declaration of bpf_stream_vprintk()
selftests/bpf: Use vmlinux.h in test_xdp_meta
bpftool: Fix truncated netlink dumps
libbpf: Delay feature gate check until object prepare time
libbpf: Do not use PROG_TYPE_TRACEPOINT program for feature gating
bpf: Add a map/btf from a fd array more consistently
selftests/bpf: Fix map_kptr grace period wait
selftests/bpf: enable fsession_test on riscv64
selftests/bpf: Adjust selftest due to function rename
bpf, riscv: add fsession support for trampolines
bpf: Fix a potential use-after-free of BTF object
bpf, riscv: introduce emit_store_stack_imm64() for trampoline
libbpf: Fix invalid write loop logic in bpf_linker__add_buf()
libbpf: Add gating for arena globals relocation feature

show more ...

selftests/bpf: Remove hexdump dependency

The verification signature header generation requires converting a
binary certificate to a C array. Previously this only worked with xxd,
and a switch to hex

selftests/bpf: Remove hexdump dependency

The verification signature header generation requires converting a
binary certificate to a C array. Previously this only worked with xxd,
and a switch to hexdump has been done in commit b640d556a2b3
("selftests/bpf: Remove xxd util dependency").

hexdump is a more common utility program, yet it might not be installed
by default. When it is not installed, BPF selftests build without
errors, but tests_progs is unusable: it exits with the 255 code and
without any error messages. When manually reproducing the issue, it is
not too hard to find out that the generated verification_cert.h file is
incorrect, but that's time consuming. When digging the BPF selftests
build logs, this line can be seen amongst thousands others, but ignored:

/bin/sh: 2: hexdump: not found

Here, od is used instead of hexdump. od is coming from the coreutils
package, and this new od command produces the same output when using od
from GNU coreutils, uutils, and even busybox. This is more portable, and
it produces a similar results to what was done before with hexdump:
there is an extra comma at the end instead of trailing whitespaces,
but the C code is not impacted.

Fixes: b640d556a2b3 ("selftests/bpf: Remove xxd util dependency")
Signed-off-by: Matthieu Baerts (NGI0) <matttbe@kernel.org>
Tested-by: Alan Maguire <alan.maguire@oracle.com>
Link: https://lore.kernel.org/r/20260218-bpf-sft-hexdump-od-v2-1-2f9b3ee5ab86@kernel.org
Signed-off-by: Alexei Starovoitov <ast@kernel.org>

show more ...

Merge tag 'nand/for-7.0' into mtd/next

SPI NAND

- The major feature this release is the support for octal DTR
modes (8D-8D-8D).
- There has been as well a series of conversion to scoped for each

Merge tag 'nand/for-7.0' into mtd/next

SPI NAND

- The major feature this release is the support for octal DTR
modes (8D-8D-8D).
- There has been as well a series of conversion to scoped for each OF
child loops.
- Support for Foresee F35SQB002G chips has been added.

Other changes are small fixes.

show more ...

Merge tag 'bpf-next-7.0' of git://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf-next

Pull bpf updates from Alexei Starovoitov:

- Support associating BPF program with struct_ops (Amery Hung)

-

Merge tag 'bpf-next-7.0' of git://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf-next

Pull bpf updates from Alexei Starovoitov:

- Support associating BPF program with struct_ops (Amery Hung)

- Switch BPF local storage to rqspinlock and remove recursion detection
counters which were causing false positives (Amery Hung)

- Fix live registers marking for indirect jumps (Anton Protopopov)

- Introduce execution context detection BPF helpers (Changwoo Min)

- Improve verifier precision for 32bit sign extension pattern
(Cupertino Miranda)

- Optimize BTF type lookup by sorting vmlinux BTF and doing binary
search (Donglin Peng)

- Allow states pruning for misc/invalid slots in iterator loops (Eduard
Zingerman)

- In preparation for ASAN support in BPF arenas teach libbpf to move
global BPF variables to the end of the region and enable arena kfuncs
while holding locks (Emil Tsalapatis)

- Introduce support for implicit arguments in kfuncs and migrate a
number of them to new API. This is a prerequisite for cgroup
sub-schedulers in sched-ext (Ihor Solodrai)

- Fix incorrect copied_seq calculation in sockmap (Jiayuan Chen)

- Fix ORC stack unwind from kprobe_multi (Jiri Olsa)

- Speed up fentry attach by using single ftrace direct ops in BPF
trampolines (Jiri Olsa)

- Require frozen map for calculating map hash (KP Singh)

- Fix lock entry creation in TAS fallback in rqspinlock (Kumar
Kartikeya Dwivedi)

- Allow user space to select cpu in lookup/update operations on per-cpu
array and hash maps (Leon Hwang)

- Make kfuncs return trusted pointers by default (Matt Bobrowski)

- Introduce "fsession" support where single BPF program is executed
upon entry and exit from traced kernel function (Menglong Dong)

- Allow bpf_timer and bpf_wq use in all programs types (Mykyta
Yatsenko, Andrii Nakryiko, Kumar Kartikeya Dwivedi, Alexei
Starovoitov)

- Make KF_TRUSTED_ARGS the default for all kfuncs and clean up their
definition across the tree (Puranjay Mohan)

- Allow BPF arena calls from non-sleepable context (Puranjay Mohan)

- Improve register id comparison logic in the verifier and extend
linked registers with negative offsets (Puranjay Mohan)

- In preparation for BPF-OOM introduce kfuncs to access memcg events
(Roman Gushchin)

- Use CFI compatible destructor kfunc type (Sami Tolvanen)

- Add bitwise tracking for BPF_END in the verifier (Tianci Cao)

- Add range tracking for BPF_DIV and BPF_MOD in the verifier (Yazhou
Tang)

- Make BPF selftests work with 64k page size (Yonghong Song)

* tag 'bpf-next-7.0' of git://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf-next: (268 commits)
selftests/bpf: Fix outdated test on storage->smap
selftests/bpf: Choose another percpu variable in bpf for btf_dump test
selftests/bpf: Remove test_task_storage_map_stress_lookup
selftests/bpf: Update task_local_storage/task_storage_nodeadlock test
selftests/bpf: Update task_local_storage/recursion test
selftests/bpf: Update sk_storage_omem_uncharge test
bpf: Switch to bpf_selem_unlink_nofail in bpf_local_storage_{map_free, destroy}
bpf: Support lockless unlink when freeing map or local storage
bpf: Prepare for bpf_selem_unlink_nofail()
bpf: Remove unused percpu counter from bpf_local_storage_map_free
bpf: Remove cgroup local storage percpu counter
bpf: Remove task local storage percpu counter
bpf: Change local_storage->lock and b->lock to rqspinlock
bpf: Convert bpf_selem_unlink to failable
bpf: Convert bpf_selem_link_map to failable
bpf: Convert bpf_selem_unlink_map to failable
bpf: Select bpf_local_storage_map_bucket based on bpf_local_storage
selftests/xsk: fix number of Tx frags in invalid packet
selftests/xsk: properly handle batch ending in the middle of a packet
bpf: Prevent reentrance into call_rcu_tasks_trace()
...

show more ...

Merge branch 'for-6.20/sony' into for-linus

- Support for Rock band 4 PS4 and PS5 guitars (Rosalie Wanders)

Merge branch 'v6.19-rc8'

Update to avoid conflicts with /urgent patches.

Signed-off-by: Peter Zijlstra <peterz@infradead.org>

Merge tag 'tags/spi-octal-dtr' into nand/next

spi: Octal DTR support

This series adds support for 8D-8D-8D in SPI NAND, which can already be
leveraged without any SPI changes as controllers already

Merge tag 'tags/spi-octal-dtr' into nand/next

spi: Octal DTR support

This series adds support for 8D-8D-8D in SPI NAND, which can already be
leveraged without any SPI changes as controllers already have this
support for some SPI NOR devices.

Among the few spi-mem patches, they are needed for building the SPI NAND
changes (especially the ODTR introduction at the end) and therefore an
immutable tag will be needed for merging in the MTD tree (unless all the
series goes through MTD directly ofc).

show more ...

selftests/bpf: Remove xxd util dependency

The verification signature header generation requires converting a
binary certificate to a C array. Previously this only worked with
xxd (part of vim-common

selftests/bpf: Remove xxd util dependency

The verification signature header generation requires converting a
binary certificate to a C array. Previously this only worked with
xxd (part of vim-common package).
As xxd may not be available on some systems building selftests, it makes
sense to substitute it with more common utils: hexdump, wc, sed to
generate equivalent C array output.

Tested by generating header with both xxd and hexdump and comparing
them.

Signed-off-by: Mykyta Yatsenko <yatsenko@meta.com>
Signed-off-by: Andrii Nakryiko <andrii@kernel.org>
Tested-by: Alan Maguire <alan.maguire@oracle.com>
Link: https://lore.kernel.org/bpf/20260128190552.242335-1-mykyta.yatsenko5@gmail.com

show more ...

Merge branch 'selftests-bpf-migrate-a-few-bpftool-testing-scripts'

Alexis Lothoré says:

====================
selftests/bpf: migrate a few bpftool testing scripts

this is the v4 for some bpftool te

Merge branch 'selftests-bpf-migrate-a-few-bpftool-testing-scripts'

Alexis Lothoré says:

====================
selftests/bpf: migrate a few bpftool testing scripts

this is the v4 for some bpftool tests conversion. The new tests are
being integrated in test_progs so that they can be executed on each CI
run.

- First commit introduces a few dedicated helpers to execute bpftool
commands, with or without retrieving the generated stdout output
- Second commit integrates test_bpftool_metadata.sh into test_progs
- Third commit integrates test_bpftool_map.sh into test_progs

Signed-off-by: Alexis Lothoré (eBPF Foundation) <alexis.lothore@bootlin.com>
---
Changes in v4:
- Port missing map access test in bpftool_metadata
- Link to v3: https://lore.kernel.org/r/20260121-bpftool-tests-v3-0-368632f377e5@bootlin.com

Changes in v3:
- Drop commit reordering objects in Makefile
- Rebased series on ci/bpf-next_base to fix conflict
- Link to v2: https://lore.kernel.org/r/20260121-bpftool-tests-v2-0-64edb47e91ae@bootlin.com

Changes in v2:
- drop standalone runner in favor of test_progs
- Link to v1: https://lore.kernel.org/r/20260114-bpftool-tests-v1-0-cfab1cc9beaf@bootlin.com

====================

Link: https://patch.msgid.link/20260123-bpftool-tests-v4-0-a6653a7f28e7@bootlin.com
Signed-off-by: Alexei Starovoitov <ast@kernel.org>

show more ...

selftests/bpf: convert test_bpftool_map_access.sh into test_progs framework

The test_bpftool_map.sh script tests that maps read/write accesses
are being properly allowed/refused by the kernel depend

selftests/bpf: convert test_bpftool_map_access.sh into test_progs framework

The test_bpftool_map.sh script tests that maps read/write accesses
are being properly allowed/refused by the kernel depending on a specific
fmod_ret program being attached on security_bpf_map function.

Rewrite this test to integrate it in the test_progs. The
new test spawns a few subtests:

#36/1 bpftool_maps_access/unprotected_unpinned:OK
#36/2 bpftool_maps_access/unprotected_pinned:OK
#36/3 bpftool_maps_access/protected_unpinned:OK
#36/4 bpftool_maps_access/protected_pinned:OK
#36/5 bpftool_maps_access/nested_maps:OK
#36/6 bpftool_maps_access/btf_list:OK
#36 bpftool_maps_access:OK
Summary: 1/6 PASSED, 0 SKIPPED, 0 FAILED

Signed-off-by: Alexis Lothoré (eBPF Foundation) <alexis.lothore@bootlin.com>
Acked-by: Quentin Monnet <qmo@kernel.org>
Link: https://lore.kernel.org/r/20260123-bpftool-tests-v4-3-a6653a7f28e7@bootlin.com
Signed-off-by: Alexei Starovoitov <ast@kernel.org>

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selftests/bpf: convert test_bpftool_metadata.sh into test_progs framework

The test_bpftool_metadata.sh script validates that bpftool properly
returns in its ouptput any metadata generated by bpf pro

selftests/bpf: convert test_bpftool_metadata.sh into test_progs framework

The test_bpftool_metadata.sh script validates that bpftool properly
returns in its ouptput any metadata generated by bpf programs through
some .rodata sections.

Port this test to the test_progs framework so that it can be executed
automatically in CI. The new test, similarly to the former script,
checks that valid data appears both for textual output and json output,
as well as for both data not used at all and used data. For the json
check part, the expected json string is hardcoded to avoid bringing a
new external dependency (eg: a json deserializer) for test_progs.
As the test is now converted into test_progs, remove the former script.

The newly converted test brings two new subtests:

#37/1 bpftool_metadata/metadata_unused:OK
#37/2 bpftool_metadata/metadata_used:OK
#37 bpftool_metadata:OK
Summary: 1/2 PASSED, 0 SKIPPED, 0 FAILED

Signed-off-by: Alexis Lothoré (eBPF Foundation) <alexis.lothore@bootlin.com>
Link: https://lore.kernel.org/r/20260123-bpftool-tests-v4-2-a6653a7f28e7@bootlin.com
Signed-off-by: Alexei Starovoitov <ast@kernel.org>

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selftests/bpf: Add a few helpers for bpftool testing

In order to integrate some bpftool tests into test_progs, define a few
specific helpers that allow to execute bpftool commands, while possibly
re

selftests/bpf: Add a few helpers for bpftool testing

In order to integrate some bpftool tests into test_progs, define a few
specific helpers that allow to execute bpftool commands, while possibly
retrieving the command output. Those helpers most notably set the
path to the bpftool binary under test. This version checks different
possible paths relative to the directories where the different
test_progs runners are executed, as we want to make sure not to
accidentally use a bootstrap version of the binary.

Signed-off-by: Alexis Lothoré (eBPF Foundation) <alexis.lothore@bootlin.com>
Link: https://lore.kernel.org/r/20260123-bpftool-tests-v4-1-a6653a7f28e7@bootlin.com
Signed-off-by: Alexei Starovoitov <ast@kernel.org>

show more ...

Merge tag 'v6.19-rc1' into msm-next

Merge Linux 6.19-rc1 in order to catch up with other changes (e.g. UBWC
config database defining UBWC_6).

Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@oss.q

Merge tag 'v6.19-rc1' into msm-next

Merge Linux 6.19-rc1 in order to catch up with other changes (e.g. UBWC
config database defining UBWC_6).

Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@oss.qualcomm.com>

show more ...

Merge tag 'v6.19-rc5' into drm-rust-next

We need the drm-rust fixes from -rc5 in here for nova-core to build on
top of.

Signed-off-by: Danilo Krummrich <dakr@kernel.org>

Merge branch 'for-linus' into for-next

Pull 6.19-devel branch for applying cirrus scodec test patches.

Signed-off-by: Takashi Iwai <tiwai@suse.de>

regulator: core: allow regulator_register() with

Merge series from André Draszik <andre.draszik@linaro.org>:

With these attached patches it becomes possible again to support
hardware designs with m

regulator: core: allow regulator_register() with

Merge series from André Draszik <andre.draszik@linaro.org>:

With these attached patches it becomes possible again to support
hardware designs with multiple PMICs where individual rails of each act
as required supplies for rails of the other (due to the latter being
e.g. always-on), and vice-versa.

Google Pixel 6 and 6 Pro (oriole and raven) are examples of such
designs.

Rather than returning -EPORBE_DEFER in regulator_register() when
set_machine_constraints() fails with -EPROBE_DEFER (due to missing
required supplies), we still allow rail registration and try to
reresolve supplies each time a new rail gets registered.

This is implemented using a bus (regulator bus), which allows the core
to reresolve supplies for regulators that still need them whenever new
regulators (i.e. devices) are added.

Using a bus also solves existing problems around late resolution of
supplies as mentioned in the commit message introducing that bus.

The series starts with a few bug fixes and the last two commits
implement the changes mentioned above, but do depend on the bug fixes.

show more ...

Merge tag 'v6.19-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux into gpio/for-next

Linux 6.19-rc5

Pull in upstream shared GPIO fixes into the v7.0 branch.

Merge drm/drm-next into drm-xe-next

Bring some drm-scheduler patches to Xe.

Signed-off-by: Rodrigo Vivi <rodrigo.vivi@intel.com>

spi: st: use pm_ptr and remove __maybe_unused

Merge series from Alain Volmat <alain.volmat@foss.st.com>:

Update ST related SPI drivers in order to remove the __maybe_unused
statements on pm related

spi: st: use pm_ptr and remove __maybe_unused

Merge series from Alain Volmat <alain.volmat@foss.st.com>:

Update ST related SPI drivers in order to remove the __maybe_unused
statements on pm related functions thanks to the usage of pm_ptr.

show more ...

Support effective VF bandwidth query in LAG mode

Currently, mlx5 driver exposes only the parent function's speed to VFs,
providing no way to query the actual effective bandwidth in LAG and
MPESW con

Support effective VF bandwidth query in LAG mode

Currently, mlx5 driver exposes only the parent function's speed to VFs,
providing no way to query the actual effective bandwidth in LAG and
MPESW configurations. This limitation prevents userspace and
upper-layer software from obtaining accurate bandwidth information,
which impacts traffic scheduling decisions.

This series addresses this by:

1. Adding mlx5 internal logic to calculate and propagate the effective
aggregated LAG speed to all attached vports. The vport speeds are
dynamically updated when LAG member link states change.

2. Extending RDMA core with a new ib_query_port_speed() verb and an
IB_EVENT_DEVICE_SPEED_CHANGE async event. These interfaces expose
the effective port speed to userspace, supporting speeds that are
not expressible as IB speed * width (where width is 2^n).

This series enables userspace applications to query the effective
port speed and receive notifications on speed changes in real-time.
In LAG configurations, each mlx5 port reports the aggregated bandwidth
of all active LAG members.

Signed-off-by: Leon Romanovsky <leon@kernel.org>

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resolve_btfids: Implement --patch_btfids

Recent changes in BTF generation [1] rely on ${OBJCOPY} command to
update .BTF_ids section data in target ELF files.

This exposed a bug in llvm-objcopy --up

resolve_btfids: Implement --patch_btfids

Recent changes in BTF generation [1] rely on ${OBJCOPY} command to
update .BTF_ids section data in target ELF files.

This exposed a bug in llvm-objcopy --update-section code path, that
may lead to corruption of a target ELF file. Specifically, because of
the bug st_shndx of some symbols may be (incorrectly) set to 0xffff
(SHN_XINDEX) [2][3].

While there is a pending fix for LLVM, it'll take some time before it
lands (likely in 22.x). And the kernel build must keep working with
older LLVM toolchains in the foreseeable future.

Using GNU objcopy for .BTF_ids update would work, but it would require
changes to LLVM-based build process, likely breaking existing build
environments as discussed in [2].

To work around llvm-objcopy bug, implement --patch_btfids code path in
resolve_btfids as a drop-in replacement for:

${OBJCOPY} --update-section .BTF_ids=${btf_ids} ${elf}

Which works specifically for .BTF_ids section:

${RESOLVE_BTFIDS} --patch_btfids ${btf_ids} ${elf}

This feature in resolve_btfids can be removed at some point in the
future, when llvm-objcopy with a relevant bugfix becomes common.

[1] https://lore.kernel.org/bpf/20251219181321.1283664-1-ihor.solodrai@linux.dev/
[2] https://lore.kernel.org/bpf/20251224005752.201911-1-ihor.solodrai@linux.dev/
[3] https://github.com/llvm/llvm-project/issues/168060#issuecomment-3533552952

Signed-off-by: Ihor Solodrai <ihor.solodrai@linux.dev>
Link: https://lore.kernel.org/r/20251231012558.1699758-1-ihor.solodrai@linux.dev
Signed-off-by: Alexei Starovoitov <ast@kernel.org>

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