From patchwork Mon Nov 20 20:54:13 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Mathieu Desnoyers X-Patchwork-Id: 13461971 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=efficios.com header.i=@efficios.com header.b="oYwtD125" Received: from smtpout.efficios.com (unknown [IPv6:2607:5300:203:b2ee::31e5]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id E5E76D9; Mon, 20 Nov 2023 12:54:42 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=efficios.com; s=smtpout1; t=1700513679; bh=Mwcrf7oCSr2SVBqlstcAk4xBZt9a0mnoM+Aqfdmqy4Y=; h=From:To:Cc:Subject:Date:From; b=oYwtD125nVYe+W0MB6r2XUkNf2OqQfo1fdqm1SiyZ1g8prH/T3lehBW6dvqWaJxLg Ya4de9QXlqN5ZN+WKw7LNhiX+032moApXuo7G5jt7iCmg2H+STvj+x46s/uzM5nU6l iWsX/oOQx1ud0tfJmObypf9XhvuWlh6l/vF9T6VCyUB8uxSV+vKc8SCD6TutnciQpR /MVFp6Y7lVCQHd8SqoSBycvGvLrvk4pGX0xEU8d5ABjm77/Kw4hWtbCR7wN0DLZiXM 0ZNkIhsgmq5ImQSC4KMj3kgLGtjL6AX60svcEAQtnXU1clDXSJx239MljyUiIc+wZk k9ro2z+tJWnjw== Received: from localhost.localdomain (192-222-143-198.qc.cable.ebox.net [192.222.143.198]) by smtpout.efficios.com (Postfix) with ESMTPSA id 4SZ0B7031Nz1cX5; Mon, 20 Nov 2023 15:54:38 -0500 (EST) From: Mathieu Desnoyers To: Steven Rostedt , Masami Hiramatsu Cc: linux-kernel@vger.kernel.org, Mathieu Desnoyers , Peter Zijlstra , Alexei Starovoitov , Yonghong Song , "Paul E . McKenney" , Ingo Molnar , Arnaldo Carvalho de Melo , Mark Rutland , Alexander Shishkin , Jiri Olsa , Namhyung Kim , bpf@vger.kernel.org, Joel Fernandes Subject: [PATCH v4 0/5] Faultable Tracepoints Date: Mon, 20 Nov 2023 15:54:13 -0500 Message-Id: <20231120205418.334172-1-mathieu.desnoyers@efficios.com> X-Mailer: git-send-email 2.25.1 Precedence: bulk X-Mailing-List: bpf@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Wire up the system call tracepoints with Tasks Trace RCU to allow the ftrace, perf, and eBPF tracers to handle page faults. This series does the initial wire-up allowing tracers to handle page faults, but leaves out the actual handling of said page faults as future work. I have tested this against a feature branch of lttng-modules which implements handling of page faults for the filename argument of the openat(2) system call. This series is based on kernel v6.6.2. Thanks, Mathieu Mathieu Desnoyers (5): tracing: Introduce faultable tracepoints (v4) tracing/ftrace: Add support for faultable tracepoints tracing/bpf-trace: add support for faultable tracepoints tracing/perf: add support for faultable tracepoints tracing: convert sys_enter/exit to faultable tracepoints Cc: Steven Rostedt Cc: Masami Hiramatsu Cc: Peter Zijlstra Cc: Alexei Starovoitov Cc: Yonghong Song Cc: Paul E. McKenney Cc: Ingo Molnar Cc: Arnaldo Carvalho de Melo Cc: Mark Rutland Cc: Alexander Shishkin Cc: Jiri Olsa Cc: Namhyung Kim Cc: bpf@vger.kernel.org Cc: Joel Fernandes include/linux/tracepoint-defs.h | 14 +++++ include/linux/tracepoint.h | 88 ++++++++++++++++++++++--------- include/trace/bpf_probe.h | 21 ++++++-- include/trace/define_trace.h | 7 +++ include/trace/events/syscalls.h | 4 +- include/trace/perf.h | 27 ++++++++-- include/trace/trace_events.h | 73 ++++++++++++++++++++++++-- init/Kconfig | 1 + kernel/trace/bpf_trace.c | 10 +++- kernel/trace/trace_events.c | 26 +++++++--- kernel/trace/trace_fprobe.c | 5 +- kernel/trace/trace_syscalls.c | 92 +++++++++++++++++++++++---------- kernel/tracepoint.c | 58 +++++++++++---------- 13 files changed, 325 insertions(+), 101 deletions(-)