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| author | Kumar Kartikeya Dwivedi <memxor@gmail.com> | 2026-09-04 10:43:19 +0200 |
|---|---|---|
| committer | Alexei Starovoitov <ast@kernel.org> | 2026-09-04 07:58:36 -0700 |
| commit | 6668ed271eaefaa63e686bdfbedaeb7b8e492722 (patch) | |
| tree | 58e8288fead484f6755ad0815fc74c3742663761 /drivers/accel/ivpu/Kconfig | |
| download | linux-stable-6668ed271eaefaa63e686bdfbedaeb7b8e492722.tar.gz linux-stable-6668ed271eaefaa63e686bdfbedaeb7b8e492722.zip | |
selftests/bpf: Reject graph kptr use after RCU unlockgrafted
Add a sleepable verifier test that loads a graph-node local kptr in an
explicit RCU read-side critical section, then passes its node to
bpf_rbtree_remove() after the section ends.
Before the verifier fix, the stale NON_OWN_REF flag makes the node look like
a live borrowed reference and the program is accepted. After the fix, the
pointer is demoted without NON_OWN_REF and the graph kfunc argument is
rejected.
Also exercise a graph kptr loaded while a spin lock provides implicit RCU
protection. The pointer must be invalidated when the lock is released, which
guards the required ordering between non-owning-reference invalidation and
RCU demotion.
Update the existing fault-protected load test state description. The
post-unlock pointer no longer carries NON_OWN_REF, but remains readable
because the load is rewritten to use BPF_PROBE_MEM.
Signed-off-by: Kumar Kartikeya Dwivedi <memxor@gmail.com>
Link: https://lore.kernel.org/r/20260904084325.52250-7-memxor@gmail.com
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Diffstat (limited to 'drivers/accel/ivpu/Kconfig')
| -rw-r--r-- | drivers/accel/ivpu/Kconfig | 27 |
1 files changed, 27 insertions, 0 deletions
diff --git a/drivers/accel/ivpu/Kconfig b/drivers/accel/ivpu/Kconfig new file mode 100644 index 000000000..9e055b5ce --- /dev/null +++ b/drivers/accel/ivpu/Kconfig @@ -0,0 +1,27 @@ +# SPDX-License-Identifier: GPL-2.0-only + +config DRM_ACCEL_IVPU + tristate "Intel NPU (Neural Processing Unit)" + depends on DRM_ACCEL + depends on X86_64 && !UML + depends on PCI && PCI_MSI + select FW_LOADER + select DRM_GEM_SHMEM_HELPER + select GENERIC_ALLOCATOR + select WANT_DEV_COREDUMP + help + Choose this option if you have a system with an 14th generation + Intel CPU (Meteor Lake) or newer. Intel NPU (formerly called Intel VPU) + is a CPU-integrated inference accelerator for Computer Vision + and Deep Learning applications. + + If "M" is selected, the module will be called intel_vpu. + +config DRM_ACCEL_IVPU_DEBUG + bool "Intel NPU debug mode" + depends on DRM_ACCEL_IVPU + help + Choose this option to enable additional + debug features for the Intel NPU driver: + - Always print debug messages regardless of dyndbg config, + - Enable unsafe module params. |