From mboxrd@z Thu Jan  1 00:00:00 1970
Return-Path: <linux-kernel-owner@vger.kernel.org>
Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand
	id S1751819AbcGNQWS (ORCPT <rfc822;w@1wt.eu>);
	Thu, 14 Jul 2016 12:22:18 -0400
Received: from foss.arm.com ([217.140.101.70]:44096 "EHLO foss.arm.com"
	rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP
	id S1751295AbcGNQWR (ORCPT <rfc822;linux-kernel@vger.kernel.org>);
	Thu, 14 Jul 2016 12:22:17 -0400
Date: Thu, 14 Jul 2016 17:22:08 +0100
From: Catalin Marinas <catalin.marinas@arm.com>
To: David Long <dave.long@linaro.org>
Cc: Huang Shijie <shijie.huang@arm.com>, James Morse <james.morse@arm.com>,
        Marc Zyngier <marc.zyngier@arm.com>,
        Pratyush Anand <panand@redhat.com>,
        Sandeepa Prabhu <sandeepa.s.prabhu@gmail.com>,
        Will Deacon <will.deacon@arm.com>, William Cohen <wcohen@redhat.com>,
        linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org,
        Steve Capper <steve.capper@linaro.org>,
        Masami Hiramatsu <mhiramat@kernel.org>,
        Li Bin <huawei.libin@huawei.com>, Jisheng Zhang <jszhang@marvell.com>,
        Mark Rutland <mark.rutland@arm.com>,
        Daniel Thompson <daniel.thompson@linaro.org>,
        Vladimir Murzin <Vladimir.Murzin@arm.com>,
        Petr Mladek <pmladek@suse.com>,
        Ard Biesheuvel <ard.biesheuvel@linaro.org>,
        Jens Wiklander <jens.wiklander@linaro.org>,
        Robin Murphy <robin.murphy@arm.com>, Mark Brown <broonie@kernel.org>,
        Suzuki K Poulose <suzuki.poulose@arm.com>,
        Dave P Martin <Dave.Martin@arm.com>,
        Andrey Ryabinin <ryabinin.a.a@gmail.com>,
        yalin wang <yalin.wang2010@gmail.com>, Yang Shi <yang.shi@linaro.org>,
        Zi Shen Lim <zlim.lnx@gmail.com>,
        John Blackwood <john.blackwood@ccur.com>,
        Andrew Morton <akpm@linux-foundation.org>,
        Alex =?iso-8859-1?Q?Benn=E9e?= <alex.bennee@linaro.org>,
        Adam Buchbinder <adam.buchbinder@gmail.com>,
        Christoffer Dall <christoffer.dall@linaro.org>
Subject: Re: [PATCH v15 00/10] arm64: Add kernel probes (kprobes) support
Message-ID: <20160714162208.GA22235@e104818-lin.cambridge.arm.com>
References: <1467995754-32508-1-git-send-email-dave.long@linaro.org>
MIME-Version: 1.0
Content-Type: text/plain; charset=us-ascii
Content-Disposition: inline
In-Reply-To: <1467995754-32508-1-git-send-email-dave.long@linaro.org>
User-Agent: Mutt/1.5.23 (2014-03-12)
Sender: linux-kernel-owner@vger.kernel.org
List-ID: <linux-kernel.vger.kernel.org>
X-Mailing-List: linux-kernel@vger.kernel.org

On Fri, Jul 08, 2016 at 12:35:44PM -0400, David Long wrote:
> David A. Long (3):
>   arm64: Add HAVE_REGS_AND_STACK_ACCESS_API feature
>   arm64: Add more test functions to insn.c
>   arm64: add conditional instruction simulation support
> 
> Pratyush Anand (2):
>   arm64: Blacklist non-kprobe-able symbol
>   arm64: Treat all entry code as non-kprobe-able
> 
> Sandeepa Prabhu (4):
>   arm64: Kprobes with single stepping support
>   arm64: kprobes instruction simulation support
>   arm64: Add kernel return probes support (kretprobes)
>   kprobes: Add arm64 case in kprobe example module
> 
> William Cohen (1):
>   arm64: Add trampoline code for kretprobes

I applied these patches on top of the arm64 for-next/core branch an
tried to run the resulting kernel in a guest (on a Juno platform using
both kvmtool and qemu) with KPROBES_SANITY_TEST enabled. Unfortunately,
the kernel fails to boot with lots of "Unexpected kernel single-step
exception at EL1".

Did you manage to run Kprobes in a guest before?

-- 
Catalin