mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2026-05-14 21:38:46 +02:00
Andrea Righi
de68c05189
Receive tools/sched_ext updates form https://github.com/sched-ext/scx to sync userspace bits: - basic BPF arena allocator abstractions, - additional process flags definitions, - fixed is_migration_disabled() helper, - separate out user_exit_info BPF and user space code. This also fixes the following warning when building the selftests: tools/sched_ext/include/scx/common.bpf.h:550:9: warning: 'likely' macro redefined [-Wmacro-redefined] 550 | #define likely(x) __builtin_expect(!!(x), 1) | ^ Co-developed-by: Cheng-Yang Chou <yphbchou0911@gmail.com> Signed-off-by: Andrea Righi <arighi@nvidia.com> Signed-off-by: Tejun Heo <tj@kernel.org>
74 lines
2.5 KiB
C
74 lines
2.5 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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/*
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* Define struct user_exit_info which is shared between BPF and userspace parts
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* to communicate exit status and other information.
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*
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* Copyright (c) 2022 Meta Platforms, Inc. and affiliates.
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* Copyright (c) 2022 Tejun Heo <tj@kernel.org>
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* Copyright (c) 2022 David Vernet <dvernet@meta.com>
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*/
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#ifndef __USER_EXIT_INFO_H
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#define __USER_EXIT_INFO_H
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#include <stdio.h>
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#include <stdbool.h>
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#include "user_exit_info_common.h"
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/* no need to call the following explicitly if SCX_OPS_LOAD() is used */
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#define UEI_SET_SIZE(__skel, __ops_name, __uei_name) ({ \
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u32 __len = (__skel)->struct_ops.__ops_name->exit_dump_len ?: UEI_DUMP_DFL_LEN; \
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(__skel)->rodata->__uei_name##_dump_len = __len; \
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RESIZE_ARRAY((__skel), data, __uei_name##_dump, __len); \
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})
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#define UEI_EXITED(__skel, __uei_name) ({ \
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/* use __sync to force memory barrier */ \
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__sync_val_compare_and_swap(&(__skel)->data->__uei_name.kind, -1, -1); \
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})
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#define UEI_REPORT(__skel, __uei_name) ({ \
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struct user_exit_info *__uei = &(__skel)->data->__uei_name; \
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char *__uei_dump = (__skel)->data_##__uei_name##_dump->__uei_name##_dump; \
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if (__uei_dump[0] != '\0') { \
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fputs("\nDEBUG DUMP\n", stderr); \
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fputs("================================================================================\n\n", stderr); \
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fputs(__uei_dump, stderr); \
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fputs("\n================================================================================\n\n", stderr); \
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} \
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fprintf(stderr, "EXIT: %s", __uei->reason); \
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if (__uei->msg[0] != '\0') \
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fprintf(stderr, " (%s)", __uei->msg); \
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fputs("\n", stderr); \
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__uei->exit_code; \
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})
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/*
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* We can't import vmlinux.h while compiling user C code. Let's duplicate
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* scx_exit_code definition.
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*/
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enum scx_exit_code {
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/* Reasons */
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SCX_ECODE_RSN_HOTPLUG = 1LLU << 32,
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/* Actions */
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SCX_ECODE_ACT_RESTART = 1LLU << 48,
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};
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enum uei_ecode_mask {
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UEI_ECODE_USER_MASK = ((1LLU << 32) - 1),
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UEI_ECODE_SYS_RSN_MASK = ((1LLU << 16) - 1) << 32,
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UEI_ECODE_SYS_ACT_MASK = ((1LLU << 16) - 1) << 48,
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};
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/*
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* These macro interpret the ecode returned from UEI_REPORT().
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*/
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#define UEI_ECODE_USER(__ecode) ((__ecode) & UEI_ECODE_USER_MASK)
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#define UEI_ECODE_SYS_RSN(__ecode) ((__ecode) & UEI_ECODE_SYS_RSN_MASK)
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#define UEI_ECODE_SYS_ACT(__ecode) ((__ecode) & UEI_ECODE_SYS_ACT_MASK)
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#define UEI_ECODE_RESTART(__ecode) (UEI_ECODE_SYS_ACT((__ecode)) == SCX_ECODE_ACT_RESTART)
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#endif /* __USER_EXIT_INFO_H */
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