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-doc@vger.kernel.org" <linux-doc@vger.kernel.org>, "linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>, "linux-arm-kernel@lists.infradead.org" <linux-arm-kernel@lists.infradead.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
WARNING: multiple messages have this Message-ID (diff)
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 _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel
next reply other threads:[~2019-08-20 3:50 UTC|newest] Thread overview: 36+ messages / expand[flat|nested] mbox.gz Atom feed top 2019-08-20 3:50 Jisheng Zhang [this message] 2019-08-20 3:50 ` [PATCH v2 0/3] arm64: KPROBES_ON_FTRACE Jisheng Zhang 2019-08-20 3:52 ` [PATCH v2 1/3] kprobes/x86: use instruction_pointer and instruction_pointer_set Jisheng Zhang 2019-08-20 3:52 ` Jisheng Zhang 2019-08-20 8:53 ` Thomas Gleixner 2019-08-20 8:53 ` Thomas Gleixner 2019-08-20 9:02 ` Jisheng Zhang 2019-08-20 9:02 ` Jisheng Zhang 2019-08-20 9:20 ` Jisheng Zhang 2019-08-20 9:20 ` Jisheng Zhang 2019-08-20 13:21 ` Peter Zijlstra 2019-08-20 13:21 ` Peter Zijlstra 2019-08-21 2:02 ` Jisheng Zhang 2019-08-21 2:02 ` Jisheng Zhang 2019-08-21 1:52 ` Masami Hiramatsu 2019-08-21 1:52 ` Masami Hiramatsu 2019-08-21 2:09 ` Jisheng Zhang 2019-08-21 2:09 ` Jisheng Zhang 2019-08-23 14:51 ` Masami Hiramatsu 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 3:53 ` Jisheng Zhang 2019-08-20 10:15 ` Naveen N. Rao 2019-08-20 10:15 ` Naveen N. Rao 2019-08-20 10:41 ` Jisheng Zhang 2019-08-20 10:41 ` Jisheng Zhang 2019-08-21 2:07 ` Masami Hiramatsu 2019-08-21 2:07 ` Masami Hiramatsu 2019-08-21 2:50 ` Jisheng Zhang 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 3:54 ` Jisheng Zhang 2019-08-20 7:17 ` Jisheng Zhang 2019-08-20 7:17 ` Jisheng Zhang 2019-08-20 8:53 ` Thomas Gleixner 2019-08-20 8:53 ` Thomas Gleixner
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