mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
synced 2025-12-27 10:01:39 -05:00
4b7de6df20
In preparation for rewriting RSEQ exit to user space handling provide storage to cache the CPU ID and MM CID values which were written to user space. That prepares for a quick check, which avoids the update when nothing changed. Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> Signed-off-by: Ingo Molnar <mingo@kernel.org> Reviewed-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com> Link: https://patch.msgid.link/20251027084306.841964081@linutronix.de
63 lines
1.4 KiB
C
63 lines
1.4 KiB
C
/* SPDX-License-Identifier: GPL-2.0+ */
|
|
#undef TRACE_SYSTEM
|
|
#define TRACE_SYSTEM rseq
|
|
|
|
#if !defined(_TRACE_RSEQ_H) || defined(TRACE_HEADER_MULTI_READ)
|
|
#define _TRACE_RSEQ_H
|
|
|
|
#include <linux/tracepoint.h>
|
|
#include <linux/types.h>
|
|
|
|
TRACE_EVENT(rseq_update,
|
|
|
|
TP_PROTO(struct task_struct *t),
|
|
|
|
TP_ARGS(t),
|
|
|
|
TP_STRUCT__entry(
|
|
__field(s32, cpu_id)
|
|
__field(s32, node_id)
|
|
__field(s32, mm_cid)
|
|
),
|
|
|
|
TP_fast_assign(
|
|
__entry->cpu_id = t->rseq.ids.cpu_id;
|
|
__entry->node_id = cpu_to_node(__entry->cpu_id);
|
|
__entry->mm_cid = t->rseq.ids.mm_cid;
|
|
),
|
|
|
|
TP_printk("cpu_id=%d node_id=%d mm_cid=%d", __entry->cpu_id,
|
|
__entry->node_id, __entry->mm_cid)
|
|
);
|
|
|
|
TRACE_EVENT(rseq_ip_fixup,
|
|
|
|
TP_PROTO(unsigned long regs_ip, unsigned long start_ip,
|
|
unsigned long post_commit_offset, unsigned long abort_ip),
|
|
|
|
TP_ARGS(regs_ip, start_ip, post_commit_offset, abort_ip),
|
|
|
|
TP_STRUCT__entry(
|
|
__field(unsigned long, regs_ip)
|
|
__field(unsigned long, start_ip)
|
|
__field(unsigned long, post_commit_offset)
|
|
__field(unsigned long, abort_ip)
|
|
),
|
|
|
|
TP_fast_assign(
|
|
__entry->regs_ip = regs_ip;
|
|
__entry->start_ip = start_ip;
|
|
__entry->post_commit_offset = post_commit_offset;
|
|
__entry->abort_ip = abort_ip;
|
|
),
|
|
|
|
TP_printk("regs_ip=0x%lx start_ip=0x%lx post_commit_offset=%lu abort_ip=0x%lx",
|
|
__entry->regs_ip, __entry->start_ip,
|
|
__entry->post_commit_offset, __entry->abort_ip)
|
|
);
|
|
|
|
#endif /* _TRACE_SOCK_H */
|
|
|
|
/* This part must be outside protection */
|
|
#include <trace/define_trace.h>
|