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authorDave Airlie <airlied@redhat.com>2022-04-07 10:21:46 +1000
committerDave Airlie <airlied@redhat.com>2022-04-07 10:21:54 +1000
commit72cfb835e56f0eec18f934095fc1a52df1815f0c (patch)
tree9bba5fb62e422813618942aa5e9195247dda4faa /scripts/checkstack.pl
parent3123109284176b1532874591f7c81f3837bbdc17 (diff)
parent15f9cd4334c83716fa32647652a609e3ba6c998d (diff)
downloadkernel-72cfb835e56f0eec18f934095fc1a52df1815f0c.tar.gz
Merge tag 'amd-drm-next-5.18-2022-03-25' of https://gitlab.freedesktop.org/agd5f/linux into drm-fixes
amd-drm-next-5.18-2022-03-25: amdgpu: - GFX 10.3.7 fixes - noretry updates - VCN fixes - TMDS fix - zstate fix for freesync video - DCN 3.1.5 fix - Display stack size fix - Audio fix - DCN 3.1 pstate fix - TMZ VCN fix - APU passthrough fix - Misc other fixes amdkfd: - Error handling fix - xgmi p2p fix - HWS VMIDs fix Signed-off-by: Dave Airlie <airlied@redhat.com> From: Alex Deucher <alexander.deucher@amd.com> Link: https://patchwork.freedesktop.org/patch/msgid/20220325183602.5718-1-alexander.deucher@amd.com
Diffstat (limited to 'scripts/checkstack.pl')
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generated by cgit v1.2.3 (git 2.46.0) at 2026-08-17 01:54:32 +0000
rrounding it. [0] Closes: https://github.com/libbpf/libbpf/issues/284 Signed-off-by: Andrii Nakryiko <andrii@kernel.org> Signed-off-by: Alexei Starovoitov <ast@kernel.org> Link: https://lore.kernel.org/bpf/20211103220845.2676888-4-andrii@kernel.org 2021-11-07libbpf: Pass number of prog load attempts explicitlyAndrii Nakryiko Allow to control number of BPF_PROG_LOAD attempts from outside the sys_bpf_prog_load() helper. Signed-off-by: Andrii Nakryiko <andrii@kernel.org> Signed-off-by: Alexei Starovoitov <ast@kernel.org> Acked-by: Dave Marchevsky <davemarchevsky@fb.com> Link: https://lore.kernel.org/bpf/20211103220845.2676888-3-andrii@kernel.org 2021-11-05libbpf: Fix lookup_and_delete_elem_flags error reportingMehrdad Arshad Rad Fix bpf_map_lookup_and_delete_elem_flags() to pass the return code through libbpf_err_errno() as we do similarly in bpf_map_lookup_and_delete_elem(). Fixes: f12b65432728 ("libbpf: Streamline error reporting for low-level APIs") Signed-off-by: Mehrdad Arshad Rad <arshad.rad@gmail.com> Signed-off-by: Daniel Borkmann <daniel@iogearbox.net> Acked-by: Yonghong Song <yhs@fb.com> Link: https://lore.kernel.org/bpf/20211104171354.11072-1-arshad.rad@gmail.com 2021-10-28libbpf: Ensure that BPF syscall fds are never 0, 1, or 2Kumar Kartikeya Dwivedi Add a simple wrapper for passing an fd and getting a new one >= 3 if it is one of 0, 1, or 2. There are two primary reasons to make this change: First, libbpf relies on the assumption a certain BPF fd is never 0 (e.g. most recently noticed in [0]). Second, Alexei pointed out in [1] that some environments reset stdin, stdout, and stderr if they notice an invalid fd at these numbers. To protect against both these cases, switch all internal BPF syscall wrappers in libbpf to always return an fd >= 3. We only need to modify the syscall wrappers and not other code that assumes a valid fd by doing >= 0, to avoid pointless churn, and because it is still a valid assumption. The cost paid is two additional syscalls if fd is in range [0, 2]. [0]: e31eec77e4ab ("bpf: selftests: Fix fd cleanup in get_branch_snapshot") [1]: https://lore.kernel.org/bpf/CAADnVQKVKY8o_3aU8Gzke443+uHa-eGoM0h7W4srChMXU1S4Bg@mail.gmail.com Signed-off-by: Kumar Kartikeya Dwivedi <memxor@gmail.com> Signed-off-by: Alexei Starovoitov <ast@kernel.org> Acked-by: Song Liu <songliubraving@fb.com> Acked-by: Andrii Nakryiko <andrii@kernel.org> Link: https://lore.kernel.org/bpf/20211028063501.2239335-5-memxor@gmail.com 2021-10-28libbpf: Add "map_extra" as a per-map-type extra flagJoanne Koong This patch adds the libbpf infrastructure for supporting a per-map-type "map_extra" field, whose definition will be idiosyncratic depending on map type. For example, for the bloom filter map, the lower 4 bits of map_extra is used to denote the number of hash functions. Please note that until libbpf 1.0 is here, the "bpf_create_map_params" struct is used as a temporary means for propagating the map_extra field to the kernel. Signed-off-by: Joanne Koong <joannekoong@fb.com> Signed-off-by: Alexei Starovoitov <ast@kernel.org> Acked-by: Andrii Nakryiko <andrii@kernel.org> Link: https://lore.kernel.org/bpf/20211027234504.30744-3-joannekoong@fb.com 2021-10-05libbpf: Support kernel module function callsKumar Kartikeya Dwivedi This patch adds libbpf support for kernel module function call support. The fd_array parameter is used during BPF program load to pass module BTFs referenced by the program. insn->off is set to index into this array, but starts from 1, because insn->off as 0 is reserved for btf_vmlinux. We try to use existing insn->off for a module, since the kernel limits the maximum distinct module BTFs for kfuncs to 256, and also because index must never exceed the maximum allowed value that can fit in insn->off (INT16_MAX). In the future, if kernel interprets signed offset as unsigned for kfunc calls, this limit can be increased to UINT16_MAX. Also introduce a btf__find_by_name_kind_own helper to start searching from module BTF's start id when we know that the BTF ID is not present in vmlinux BTF (in find_ksym_btf_id). Signed-off-by: Kumar Kartikeya Dwivedi <memxor@gmail.com> Signed-off-by: Alexei Starovoitov <ast@kernel.org> Link: https://lore.kernel.org/bpf/20211002011757.311265-7-memxor@gmail.com 2021-08-17libbpf: Add bpf_cookie support to bpf_link_create() APIAndrii Nakryiko Add ability to specify bpf_cookie value when creating BPF perf link with bpf_link_create() low-level API. Given BPF_LINK_CREATE command is growing and keeps getting new fields that are specific to the type of BPF_LINK, extend libbpf side of bpf_link_create() API and corresponding OPTS struct to accomodate such changes. Add extra checks to prevent using incompatible/unexpected combinations of fields. Signed-off-by: Andrii Nakryiko <andrii@kernel.org> Signed-off-by: Daniel Borkmann <daniel@iogearbox.net> Link: https://lore.kernel.org/bpf/20210815070609.987780-11-andrii@kernel.org 2021-05-25libbpf: Streamline error reporting for low-level APIsAndrii Nakryiko Ensure that low-level APIs behave uniformly across the libbpf as follows: - in case of an error, errno is always set to the correct error code; - when libbpf 1.0 mode is enabled with LIBBPF_STRICT_DIRECT_ERRS option to libbpf_set_strict_mode(), return -Exxx error value directly, instead of -1; - by default, until libbpf 1.0 is released, keep returning -1 directly. More context, justification, and discussion can be found in "Libbpf: the road to v1.0" document ([0]). [0] https://docs.google.com/document/d/1UyjTZuPFWiPFyKk1tV5an11_iaRuec6U-ZESZ54nNTY Signed-off-by: Andrii Nakryiko <andrii@kernel.org> Signed-off-by: Alexei Starovoitov <ast@kernel.org> Acked-by: John Fastabend <john.fastabend@gmail.com> Acked-by: Toke Høiland-Jørgensen <toke@redhat.com> Link: https://lore.kernel.org/bpf/20210525035935.1461796-4-andrii@kernel.org 2021-05-24bpf: Extend libbpf with bpf_map_lookup_and_delete_elem_flagsDenis Salopek Add bpf_map_lookup_and_delete_elem_flags() libbpf API in order to use the BPF_F_LOCK flag with the map_lookup_and_delete_elem() function. Signed-off-by: Denis Salopek <denis.salopek@sartura.hr> Signed-off-by: Andrii Nakryiko <andrii@kernel.org> Acked-by: Yonghong Song <yhs@fb.com> Link: https://lore.kernel.org/bpf/15b05dafe46c7e0750d110f233977372029d1f62.1620763117.git.denis.salopek@sartura.hr 2020-12-03libbpf: Support attachment of BPF tracing programs to kernel modulesAndrii Nakryiko Teach libbpf to search for BTF types in kernel modules for tracing BPF programs. This allows attachment of raw_tp/fentry/fexit/fmod_ret/etc BPF program types to tracepoints and functions in kernel modules. Signed-off-by: Andrii Nakryiko <andrii@kernel.org> Signed-off-by: Alexei Starovoitov <ast@kernel.org> Link: https://lore.kernel.org/bpf/20201203204634.1325171-13-andrii@kernel.org 2020-12-03libbpf: Factor out low-level BPF program loading helperAndrii Nakryiko Refactor low-level API for BPF program loading to not rely on public API types. This allows painless extension without constant efforts to cleverly not break backwards compatibility. Signed-off-by: Andrii Nakryiko <andrii@kernel.org> Signed-off-by: Alexei Starovoitov <ast@kernel.org> Link: https://lore.kernel.org/bpf/20201203204634.1325171-12-andrii@kernel.org 2020-12-03libbpf: Cap retries in sys_bpf_prog_loadStanislav Fomichev I've seen a situation, where a process that's under pprof constantly generates SIGPROF which prevents program loading indefinitely. The right thing to do probably is to disable signals in the upper layers while loading, but it still would be nice to get some error from libbpf instead of an endless loop. Let's add some small retry limit to the program loading: try loading the program 5 (arbitrary) times and give up. v2: * 10 -> 5 retires (Andrii Nakryiko) Signed-off-by: Stanislav Fomichev <sdf@google.com> Signed-off-by: Andrii Nakryiko <andrii@kernel.org> Acked-by: Andrii Nakryiko <andrii@kernel.org> Link: https://lore.kernel.org/bpf/20201202231332.3923644-1-sdf@google.com 2020-09-29libbpf: Add support for freplace attachment in bpf_link_createToke Høiland-Jørgensen This adds support for supplying a target btf ID for the bpf_link_create() operation, and adds a new bpf_program__attach_freplace() high-level API for attaching freplace functions with a target. Signed-off-by: Toke Høiland-Jørgensen <toke@redhat.com> Signed-off-by: Alexei Starovoitov <ast@kernel.org> Acked-by: Andrii Nakryiko <andriin@fb.com> Link: https://lore.kernel.org/bpf/160138355387.48470.18026176785351166890.stgit@toke.dk 2020-09-28libbpf: Remove assumption of single contiguous memory for BTF dataAndrii Nakryiko Refactor internals of struct btf to remove assumptions that BTF header, type data, and string data are layed out contiguously in a memory in a single memory allocation. Now we have three separate pointers pointing to the start of each respective are: header, types, strings. In the next patches, these pointers will be re-assigned to point to independently allocated memory areas, if BTF needs to be modified. Signed-off-by: Andrii Nakryiko <andriin@fb.com> Signed-off-by: Alexei Starovoitov <ast@kernel.org> Acked-by: John Fastabend <john.fastabend@gmail.com> Link: https://lore.kernel.org/bpf/20200926011357.2366158-3-andriin@fb.com 2020-09-28libbpf: Support test run of raw tracepoint programsSong Liu Add bpf_prog_test_run_opts() with support of new fields in bpf_attr.test, namely, flags and cpu. Also extend _opts operations to support outputs via opts. Signed-off-by: Song Liu <songliubraving@fb.com> Signed-off-by: Daniel Borkmann <daniel@iogearbox.net> Acked-by: Andrii Nakryiko <andriin@fb.com> Link: https://lore.kernel.org/bpf/20200925205432.1777-3-songliubraving@fb.com 2020-09-15libbpf: Add BPF_PROG_BIND_MAP syscall and use it on .rodata sectionYiFei Zhu The patch adds a simple wrapper bpf_prog_bind_map around the syscall. When the libbpf tries to load a program, it will probe the kernel for the support of this syscall and unconditionally bind .rodata section to the program. Signed-off-by: YiFei Zhu <zhuyifei@google.com> Signed-off-by: Stanislav Fomichev <sdf@google.com> Signed-off-by: Alexei Starovoitov <ast@kernel.org> Cc: YiFei Zhu <zhuyifei1999@gmail.com> Link: https://lore.kernel.org/bpf/20200915234543.3220146-4-sdf@google.com