Merge drm/drm-next into drm-intel-gt-next

We need
4ba4f1afb6a9 ("perf: Generic hotplug support for a PMU with a scope")
in order to land a i915 PMU simplification and a fix. That landed in 6.12
and

Merge drm/drm-next into drm-intel-gt-next

We need
4ba4f1afb6a9 ("perf: Generic hotplug support for a PMU with a scope")
in order to land a i915 PMU simplification and a fix. That landed in 6.12
and we are stuck at 6.9 so lets bump things forward.

Signed-off-by: Tvrtko Ursulin <tursulin@ursulin.net>

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Merge branch 'linus' into x86/mm, to pick up fixes

Signed-off-by: Ingo Molnar <mingo@kernel.org>

Merge branch 'next' into for-linus

Prepare input updates for 6.14 merge window.

Merge tag 'v6.13-rc3' into next

Sync up with the mainline.

Merge remote-tracking branch 'pm/opp/linux-next' into HEAD

Merge pm/opp tree to get dev_pm_opp_get_bw()

Signed-off-by: Rob Clark <robdclark@chromium.org>

Merge drm/drm-next into drm-intel-next

Catching up with 6.13-rc2.

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

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

A backmerge to get the PMT preparation work for
merging the BMG PMT support.

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

Merge drm/drm-next into drm-misc-next

Kickstart 6.14 cycle.

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

Merge tag 'v6.13-rc1' into perf/core, to refresh the branch

Signed-off-by: Ingo Molnar <mingo@kernel.org>

Merge tag 'asoc-fix-v6.13-rc1' of https://git.kernel.org/pub/scm/linux/kernel/git/broonie/sound into for-linus

ASoC: Fixes for v6.13

A few small fixes for v6.13, all system specific - the biggest t

Merge tag 'asoc-fix-v6.13-rc1' of https://git.kernel.org/pub/scm/linux/kernel/git/broonie/sound into for-linus

ASoC: Fixes for v6.13

A few small fixes for v6.13, all system specific - the biggest thing is
the fix for jack handling over suspend on some Intel laptops.

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Merge branch 'ovl.fixes'

Bring in an overlayfs fix for v6.13-rc1 that fixes a bug introduced by
the overlayfs changes merged for v6.13.

Signed-off-by: Christian Brauner <brauner@kernel.org>

Merge tag 'bpf-next-6.13' of git://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf-next

Pull bpf updates from Alexei Starovoitov:

- Add BPF uprobe session support (Jiri Olsa)

- Optimize uprobe p

Merge tag 'bpf-next-6.13' of git://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf-next

Pull bpf updates from Alexei Starovoitov:

- Add BPF uprobe session support (Jiri Olsa)

- Optimize uprobe performance (Andrii Nakryiko)

- Add bpf_fastcall support to helpers and kfuncs (Eduard Zingerman)

- Avoid calling free_htab_elem() under hash map bucket lock (Hou Tao)

- Prevent tailcall infinite loop caused by freplace (Leon Hwang)

- Mark raw_tracepoint arguments as nullable (Kumar Kartikeya Dwivedi)

- Introduce uptr support in the task local storage map (Martin KaFai
Lau)

- Stringify errno log messages in libbpf (Mykyta Yatsenko)

- Add kmem_cache BPF iterator for perf's lock profiling (Namhyung Kim)

- Support BPF objects of either endianness in libbpf (Tony Ambardar)

- Add ksym to struct_ops trampoline to fix stack trace (Xu Kuohai)

- Introduce private stack for eligible BPF programs (Yonghong Song)

- Migrate samples/bpf tests to selftests/bpf test_progs (Daniel T. Lee)

- Migrate test_sock to selftests/bpf test_progs (Jordan Rife)

* tag 'bpf-next-6.13' of git://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf-next: (152 commits)
libbpf: Change hash_combine parameters from long to unsigned long
selftests/bpf: Fix build error with llvm 19
libbpf: Fix memory leak in bpf_program__attach_uprobe_multi
bpf: use common instruction history across all states
bpf: Add necessary migrate_disable to range_tree.
bpf: Do not alloc arena on unsupported arches
selftests/bpf: Set test path for token/obj_priv_implicit_token_envvar
selftests/bpf: Add a test for arena range tree algorithm
bpf: Introduce range_tree data structure and use it in bpf arena
samples/bpf: Remove unused variable in xdp2skb_meta_kern.c
samples/bpf: Remove unused variables in tc_l2_redirect_kern.c
bpftool: Cast variable `var` to long long
bpf, x86: Propagate tailcall info only for subprogs
bpf: Add kernel symbol for struct_ops trampoline
bpf: Use function pointers count as struct_ops links count
bpf: Remove unused member rcu from bpf_struct_ops_map
selftests/bpf: Add struct_ops prog private stack tests
bpf: Support private stack for struct_ops progs
selftests/bpf: Add tracing prog private stack tests
bpf, x86: Support private stack in jit
...

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selftests/bpf: Add a test for open coded kmem_cache iter

The new subtest runs with bpf_prog_test_run_opts() as a syscall prog.
It iterates the kmem_cache using bpf_for_each loop and count the number

selftests/bpf: Add a test for open coded kmem_cache iter

The new subtest runs with bpf_prog_test_run_opts() as a syscall prog.
It iterates the kmem_cache using bpf_for_each loop and count the number
of entries. Finally it checks it with the number of entries from the
regular iterator.

$ ./vmtest.sh -- ./test_progs -t kmem_cache_iter
...
#130/1 kmem_cache_iter/check_task_struct:OK
#130/2 kmem_cache_iter/check_slabinfo:OK
#130/3 kmem_cache_iter/open_coded_iter:OK
#130 kmem_cache_iter:OK
Summary: 1/3 PASSED, 0 SKIPPED, 0 FAILED

Also simplify the code by using attach routine of the skeleton.

Signed-off-by: Namhyung Kim <namhyung@kernel.org>
Link: https://lore.kernel.org/r/20241030222819.1800667-2-namhyung@kernel.org
Signed-off-by: Alexei Starovoitov <ast@kernel.org>

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selftests/bpf: drop unnecessary bpf_iter.h type duplication

Drop bpf_iter.h header which uses vmlinux.h but re-defines a bunch of
iterator structures and some of BPF constants for use in BPF iterato

selftests/bpf: drop unnecessary bpf_iter.h type duplication

Drop bpf_iter.h header which uses vmlinux.h but re-defines a bunch of
iterator structures and some of BPF constants for use in BPF iterator
selftests.

None of that is necessary when fresh vmlinux.h header is generated for
vmlinux image that matches latest selftests. So drop ugly hacks and have
a nice plain vmlinux.h usage everywhere.

We could do the same with all the kfunc __ksym redefinitions, but that
has dependency on very fresh pahole, so I'm not addressing that here.

Signed-off-by: Andrii Nakryiko <andrii@kernel.org>
Link: https://lore.kernel.org/r/20241029203919.1948941-1-andrii@kernel.org
Signed-off-by: Alexei Starovoitov <ast@kernel.org>

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Merge branch 'bpf-add-kmem_cache-iterator-and-kfunc'

Namhyung Kim says:

====================
bpf: Add kmem_cache iterator and kfunc

Hello,

I'm proposing a new iterator and a kfunc for the slab me

Merge branch 'bpf-add-kmem_cache-iterator-and-kfunc'

Namhyung Kim says:

====================
bpf: Add kmem_cache iterator and kfunc

Hello,

I'm proposing a new iterator and a kfunc for the slab memory allocator
to get information of each kmem_cache like in /proc/slabinfo or
/sys/kernel/slab in more flexible way.

v5 changes

* set PTR_UNTRUSTED for return value of bpf_get_kmem_cache() (Alexei)
* add KF_RCU_PROTECTED to bpf_get_kmem_cache(). See below. (Song)
* add WARN_ON_ONCE and comment in kmem_cache_iter_seq_next() (Song)
* change kmem_cache_iter_seq functions not to call BPF on intermediate stop
* add a subtest to compare the kmem cache info with /proc/slabinfo (Alexei)

v4: https://lore.kernel.org/lkml/20241002180956.1781008-1-namhyung@kernel.org

* skip kmem_cache_destroy() in kmem_cache_iter_seq_stop() if possible (Vlastimil)
* fix a bug in the kmem_cache_iter_seq_start() for the last entry

v3: https://lore.kernel.org/lkml/20241002065456.1580143-1-namhyung@kernel.org/

* rework kmem_cache_iter not to hold slab_mutex when running BPF (Alexei)
* add virt_addr_valid() check (Alexei)
* fix random test failure by running test with the current task (Hyeonggon)

v2: https://lore.kernel.org/lkml/20240927184133.968283-1-namhyung@kernel.org/

* rename it to "kmem_cache_iter"
* fix a build issue
* add Acked-by's from Roman and Vlastimil (Thanks!)
* add error codes in the test for debugging

v1: https://lore.kernel.org/lkml/20240925223023.735947-1-namhyung@kernel.org/

My use case is `perf lock contention` tool which shows contended locks
but many of them are not global locks and don't have symbols. If it
can tranlate the address of the lock in a slab object to the name of
the slab, it'd be much more useful.

I'm not aware of type information in slab yet, but I was told there's
a work to associate BTF ID with it. It'd be definitely helpful to my
use case. Probably we need another kfunc to get the start address of
the object or the offset in the object from an address if the type
info is available. But I want to start with a simple thing first.

The kmem_cache_iter iterates kmem_cache objects under slab_mutex and
will be useful for userspace to prepare some work for specific slabs
like setting up filters in advance. And the bpf_get_kmem_cache()
kfunc will return a pointer to a slab from the address of a lock.

And the test code is to read from the iterator and make sure it finds
a slab cache of the task_struct for the current task.

The code is available at 'bpf/slab-iter-v5' branch in
https://git.kernel.org/pub/scm/linux/kernel/git/namhyung/linux-perf.git

Thanks,
Namhyung
====================

Link: https://lore.kernel.org/r/20241010232505.1339892-1-namhyung@kernel.org
Signed-off-by: Alexei Starovoitov <ast@kernel.org>

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selftests/bpf: Add a test for kmem_cache_iter

The test traverses all slab caches using the kmem_cache_iter and save
the data into slab_result array map. And check if current task's
pointer is from

selftests/bpf: Add a test for kmem_cache_iter

The test traverses all slab caches using the kmem_cache_iter and save
the data into slab_result array map. And check if current task's
pointer is from "task_struct" slab cache using bpf_get_kmem_cache().

Also compare the result array with /proc/slabinfo if available (when
CONFIG_SLUB_DEBUG is on). Note that many of the fields in the slabinfo
are transient, so it only compares the name and objsize fields.

Signed-off-by: Namhyung Kim <namhyung@kernel.org>
Link: https://lore.kernel.org/r/20241010232505.1339892-4-namhyung@kernel.org
Signed-off-by: Alexei Starovoitov <ast@kernel.org>

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