From: Arnaldo Carvalho de Melo <acme@kernel.org>
To: Masami Hiramatsu <mhiramat@kernel.org>
Cc: Mark Rutland <mark.rutland@arm.com>,
Song Liu <songliubraving@fb.com>,
Peter Zijlstra <peterz@infradead.org>,
Benjamin Herrenschmidt <benh@kernel.crashing.org>,
"joonas.lahtinen@linux.intel.com"
<joonas.lahtinen@linux.intel.com>,
Will Deacon <will.deacon@arm.com>,
Alexei Starovoitov <ast@kernel.org>,
Stephane Eranian <eranian@google.com>,
"james.bottomley@hansenpartnership.com"
<james.bottomley@hansenpartnership.com>,
Paul Mackerras <paulus@samba.org>, Jiri Olsa <jolsa@redhat.com>,
Andi Kleen <ak@linux.intel.com>,
Michael Ellerman <mpe@ellerman.id.au>,
Alexey Budankov <alexey.budankov@linux.intel.com>,
Igor Lubashev <ilubashe@akamai.com>,
James Morris <jmorris@namei.org>,
Alexander Shishkin <alexander.shishkin@linux.intel.com>,
Ingo Molnar <mingo@redhat.com>,
oprofile-list@lists.sf.net, Serge Hallyn <serge@hallyn.com>,
Robert Richter <rric@kernel.org>, Kees Cook <keesc>
Subject: Re: [PATCH v4 2/9] perf/core: open access for CAP_SYS_PERFMON privileged process
Date: Fri, 10 Jan 2020 13:45:31 -0300 [thread overview]
Message-ID: <20200110164531.GA2598@kernel.org> (raw)
In-Reply-To: <20200111005213.6dfd98fb36ace098004bde0e@kernel.org>
Em Sat, Jan 11, 2020 at 12:52:13AM +0900, Masami Hiramatsu escreveu:
> On Fri, 10 Jan 2020 15:02:34 +0100 Peter Zijlstra <peterz@infradead.org> wrote:
> > Again, this only allows attaching to previously created kprobes, it does
> > not allow creating kprobes, right?
> > That is; I don't think CAP_SYS_PERFMON should be allowed to create
> > kprobes.
> > As might be clear; I don't actually know what the user-ABI is for
> > creating kprobes.
> There are 2 ABIs nowadays, ftrace and ebpf. perf-probe uses ftrace interface to
> define new kprobe events, and those events are treated as completely same as
> tracepoint events. On the other hand, ebpf tries to define new probe event
> via perf_event interface. Above one is that interface. IOW, it creates new kprobe.
Masami, any plans to make 'perf probe' use the perf_event_open()
interface for creating kprobes/uprobes?
- Arnaldo
next prev parent reply other threads:[~2020-01-10 16:45 UTC|newest]
Thread overview: 28+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-12-18 9:16 [PATCH v4 0/7] Introduce CAP_SYS_PERFMON to secure system performance monitoring and observability Alexey Budankov
2019-12-18 9:24 ` [PATCH v4 1/9] capabilities: introduce CAP_SYS_PERFMON to kernel and user space Alexey Budankov
2019-12-18 19:56 ` Stephen Smalley
2019-12-28 3:53 ` Serge E. Hallyn
2020-01-13 20:25 ` Song Liu
2019-12-18 9:25 ` [PATCH v4 2/9] perf/core: open access for CAP_SYS_PERFMON privileged process Alexey Budankov
2020-01-08 16:07 ` Peter Zijlstra
2020-01-09 11:36 ` Alexey Budankov
2020-01-10 14:02 ` Peter Zijlstra
2020-01-10 15:52 ` Masami Hiramatsu
2020-01-10 16:45 ` Arnaldo Carvalho de Melo [this message]
2020-01-10 23:47 ` Masami Hiramatsu
2020-01-11 0:23 ` Song Liu
[not found] ` <5e191833.1c69fb81.8bc25.a88c@mx.google.com>
2020-01-12 1:44 ` Masami Hiramatsu
2020-01-10 16:41 ` Alexey Budankov
2020-01-10 17:34 ` Alexey Budankov
2019-12-18 9:26 ` [PATCH v4 3/9] perf tool: extend Perf tool with CAP_SYS_PERFMON capability support Alexey Budankov
2019-12-18 9:27 ` [PATCH v4 4/9] drm/i915/perf: open access for CAP_SYS_PERFMON privileged process Alexey Budankov
2019-12-19 9:10 ` Lionel Landwerlin
2019-12-18 9:28 ` [PATCH v4 5/9] trace/bpf_trace: " Alexey Budankov
2020-01-13 20:47 ` Song Liu
2019-12-18 9:28 ` [PATCH v4 6/9] powerpc/perf: " Alexey Budankov
2019-12-18 9:29 ` [PATCH v4 7/9] parisc/perf: " Alexey Budankov
2020-01-27 8:52 ` Helge Deller
2019-12-18 9:30 ` [PATCH v4 8/9] drivers/perf: " Alexey Budankov
2020-01-17 10:51 ` Will Deacon
2020-01-17 21:33 ` Alexey Budankov
2019-12-18 9:31 ` [PATCH v4 9/9] drivers/oprofile: " Alexey Budankov
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