Greg Kroah-Hartman
598cf27219
Link: https://lore.kernel.org/r/20260217200002.683975158@linuxfoundation.org Tested-by: Florian Fainelli <florian.fainelli@broadcom.com> Tested-by: Takeshi Ogasawara <takeshi.ogasawara@futuring-girl.com> Tested-by: Peter Schneider <pschneider1968@googlemail.com> Tested-by: Jon Hunter <jonathanh@nvidia.com> Tested-by: Salvatore Bonaccorso <carnil@debian.org> Tested-by: Brett A C Sheffield <bacs@librecast.net> Tested-by: Mark Brown <broonie@kernel.org> Tested-by: Luna Jernberg <droidbittin@gmail.com> Tested-by: Ronald Warsow <rwarsow@gmx.de> Tested-by: Justin M. Forbes <jforbes@fedoraproject.org> Tested-by: Ron Economos <re@w6rz.net> Tested-by: Miguel Ojeda <ojeda@kernel.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
49 lines
982 B
C
49 lines
982 B
C
// SPDX-License-Identifier: GPL-2.0
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#include <vmlinux.h>
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#include <bpf/bpf_helpers.h>
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#include <bpf/bpf_tracing.h>
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#include "bpf_experimental.h"
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char _license[] SEC("license") = "GPL";
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#define CLOCK_MONOTONIC 1
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int preempt_count;
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int in_interrupt;
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int in_interrupt_cb;
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struct elem {
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struct bpf_timer t;
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};
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struct {
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__uint(type, BPF_MAP_TYPE_ARRAY);
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__uint(max_entries, 1);
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__type(key, int);
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__type(value, struct elem);
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} array SEC(".maps");
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static int timer_in_interrupt(void *map, int *key, struct bpf_timer *timer)
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{
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preempt_count = get_preempt_count();
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in_interrupt_cb = bpf_in_interrupt();
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return 0;
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}
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SEC("fentry/bpf_fentry_test1")
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int BPF_PROG(test_timer_interrupt)
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{
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struct bpf_timer *timer;
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int key = 0;
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timer = bpf_map_lookup_elem(&array, &key);
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if (!timer)
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return 0;
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in_interrupt = bpf_in_interrupt();
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bpf_timer_init(timer, &array, CLOCK_MONOTONIC);
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bpf_timer_set_callback(timer, timer_in_interrupt);
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bpf_timer_start(timer, 0, 0);
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return 0;
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}
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