diff options
author | Thomas Zimmermann <tzimmermann@suse.de> | 2023-10-11 09:50:59 +0200 |
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committer | Thomas Zimmermann <tzimmermann@suse.de> | 2023-10-11 09:50:59 +0200 |
commit | 57390019b68b83f96eb98f490367b9df1f2d77cb (patch) | |
tree | e6d4b6c75efdd2d7fb7d37f980688c491be3ff6a /tools/perf/tests/bpf-script-example.c | |
parent | e5f9d543419c78ac58f3b3557bc5a76b20ff600b (diff) | |
parent | 389af786f92ecdff35883551d54bf4e507ffcccb (diff) |
Merge drm/drm-next into drm-misc-next
Updating drm-misc-next to the state of Linux v6.6-rc2.
Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de>
Diffstat (limited to 'tools/perf/tests/bpf-script-example.c')
-rw-r--r-- | tools/perf/tests/bpf-script-example.c | 60 |
1 files changed, 0 insertions, 60 deletions
diff --git a/tools/perf/tests/bpf-script-example.c b/tools/perf/tests/bpf-script-example.c deleted file mode 100644 index b638cc99d5ae..000000000000 --- a/tools/perf/tests/bpf-script-example.c +++ /dev/null @@ -1,60 +0,0 @@ -// SPDX-License-Identifier: GPL-2.0 -/* - * bpf-script-example.c - * Test basic LLVM building - */ -#ifndef LINUX_VERSION_CODE -# error Need LINUX_VERSION_CODE -# error Example: for 4.2 kernel, put 'clang-opt="-DLINUX_VERSION_CODE=0x40200" into llvm section of ~/.perfconfig' -#endif -#define BPF_ANY 0 -#define BPF_MAP_TYPE_ARRAY 2 -#define BPF_FUNC_map_lookup_elem 1 -#define BPF_FUNC_map_update_elem 2 - -static void *(*bpf_map_lookup_elem)(void *map, void *key) = - (void *) BPF_FUNC_map_lookup_elem; -static void *(*bpf_map_update_elem)(void *map, void *key, void *value, int flags) = - (void *) BPF_FUNC_map_update_elem; - -/* - * Following macros are taken from tools/lib/bpf/bpf_helpers.h, - * and are used to create BTF defined maps. It is easier to take - * 2 simple macros, than being able to include above header in - * runtime. - * - * __uint - defines integer attribute of BTF map definition, - * Such attributes are represented using a pointer to an array, - * in which dimensionality of array encodes specified integer - * value. - * - * __type - defines pointer variable with typeof(val) type for - * attributes like key or value, which will be defined by the - * size of the type. - */ -#define __uint(name, val) int (*name)[val] -#define __type(name, val) typeof(val) *name - -#define SEC(NAME) __attribute__((section(NAME), used)) -struct { - __uint(type, BPF_MAP_TYPE_ARRAY); - __uint(max_entries, 1); - __type(key, int); - __type(value, int); -} flip_table SEC(".maps"); - -SEC("syscalls:sys_enter_epoll_pwait") -int bpf_func__SyS_epoll_pwait(void *ctx) -{ - int ind =0; - int *flag = bpf_map_lookup_elem(&flip_table, &ind); - int new_flag; - if (!flag) - return 0; - /* flip flag and store back */ - new_flag = !*flag; - bpf_map_update_elem(&flip_table, &ind, &new_flag, BPF_ANY); - return new_flag; -} -char _license[] SEC("license") = "GPL"; -int _version SEC("version") = LINUX_VERSION_CODE; |