From: Jisheng Zhang <Jisheng.Zhang@synaptics.com>
To: Catalin Marinas <catalin.marinas@arm.com>,
Jonathan Corbet <corbet@lwn.net>, Will Deacon <will@kernel.org>,
Thomas Gleixner <tglx@linutronix.de>,
Ingo Molnar <mingo@redhat.com>, Borislav Petkov <bp@alien8.de>,
"H. Peter Anvin" <hpa@zytor.com>,
"x86@kernel.org" <x86@kernel.org>,
"Naveen N. Rao" <naveen.n.rao@linux.ibm.com>,
Anil S Keshavamurthy <anil.s.keshavamurthy@intel.com>,
"David S. Miller" <davem@davemloft.net>,
Masami Hiramatsu <mhiramat@kernel.org>
Cc: "linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
"linux-arm-kernel@lists.infradead.org"
<linux-arm-kernel@lists.infradead.org>,
"linux-doc@vger.kernel.org" <linux-doc@vger.kernel.org>
Subject: [PATCH v2 0/3] arm64: KPROBES_ON_FTRACE
Date: Tue, 20 Aug 2019 03:50:42 +0000 [thread overview]
Message-ID: <20190820113928.1971900c@xhacker.debian> (raw)
KPROBES_ON_FTRACE avoids much of the overhead with regular kprobes as it
eliminates the need for a trap, as well as the need to emulate or
single-step instructions.
Applied after arm64 FTRACE_WITH_REGS:
http://lists.infradead.org/pipermail/linux-arm-kernel/2019-August/674404.html
Changes since v1:
- make the kprobes/x86: use instruction_pointer and instruction_pointer_set
as patch1
- add Masami's ACK to patch1
- add some description about KPROBES_ON_FTRACE and why we need it on
arm64
- correct the log before the patch
- remove the consolidation patch, make it as TODO
- only adjust kprobe's addr when KPROBE_FLAG_FTRACE is set
- if KPROBES_ON_FTRACE, ftrace_call_adjust() the kprobe's addr before
calling ftrace_location()
- update the kprobes-on-ftrace/arch-support.txt in doc
Jisheng Zhang (3):
kprobes/x86: use instruction_pointer and instruction_pointer_set
kprobes: adjust kprobe addr for KPROBES_ON_FTRACE
arm64: implement KPROBES_ON_FTRACE
.../debug/kprobes-on-ftrace/arch-support.txt | 2 +-
arch/arm64/Kconfig | 1 +
arch/arm64/kernel/probes/Makefile | 1 +
arch/arm64/kernel/probes/ftrace.c | 60 +++++++++++++++++++
arch/x86/kernel/kprobes/ftrace.c | 9 +--
kernel/kprobes.c | 10 +++-
6 files changed, 75 insertions(+), 8 deletions(-)
create mode 100644 arch/arm64/kernel/probes/ftrace.c
--
2.23.0.rc1
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next reply other threads:[~2019-08-20 3:50 UTC|newest]
Thread overview: 18+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-08-20 3:50 Jisheng Zhang [this message]
2019-08-20 3:52 ` [PATCH v2 1/3] kprobes/x86: use instruction_pointer and instruction_pointer_set Jisheng Zhang
2019-08-20 8:53 ` Thomas Gleixner
2019-08-20 9:02 ` Jisheng Zhang
2019-08-20 9:20 ` Jisheng Zhang
2019-08-20 13:21 ` Peter Zijlstra
2019-08-21 2:02 ` Jisheng Zhang
2019-08-21 1:52 ` Masami Hiramatsu
2019-08-21 2:09 ` Jisheng Zhang
2019-08-23 14:51 ` Masami Hiramatsu
2019-08-20 3:53 ` [PATCH v2 2/3] kprobes: adjust kprobe addr for KPROBES_ON_FTRACE Jisheng Zhang
2019-08-20 10:15 ` Naveen N. Rao
2019-08-20 10:41 ` Jisheng Zhang
2019-08-21 2:07 ` Masami Hiramatsu
2019-08-21 2:50 ` Jisheng Zhang
2019-08-20 3:54 ` [PATCH v2 3/3] arm64: implement KPROBES_ON_FTRACE Jisheng Zhang
2019-08-20 7:17 ` Jisheng Zhang
2019-08-20 8:53 ` Thomas Gleixner
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