Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) client-ip=2620:137:e000::1:20;
Date:   Wed, 7 Dec 2022 16:59:24 +0100
From:   Michal =?iso-8859-1?Q?Such=E1nek?= <msuchanek@suse.de>
To:     Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Cc:     Michael Ellerman <mpe@ellerman.id.au>,
        Michael Jeanson <mjeanson@efficios.com>,
        Christophe Leroy <christophe.leroy@csgroup.eu>,
        Steven Rostedt <rostedt@goodmis.org>,
        "stable@vger.kernel.org" <stable@vger.kernel.org>,
        Masami Hiramatsu <mhiramat@kernel.org>,
        Mark Rutland <mark.rutland@arm.com>,
        Nicholas Piggin <npiggin@gmail.com>,
        "linuxppc-dev@lists.ozlabs.org" <linuxppc-dev@lists.ozlabs.org>,
        "linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>
Subject: Re: [PATCH] powerpc/ftrace: fix syscall tracing on PPC64_ELF_ABI_V1
Message-ID: <20221207155924.GG28810@kitsune.suse.cz>
References: <20221201161442.2127231-1-mjeanson@efficios.com>
 <87pmcys9ae.fsf@mpe.ellerman.id.au>
 <d5dd1491-5d59-7987-9b5b-83f5fb1b29ee@efficios.com>
 <219580de-7473-f142-5ef2-1ed40e41d13d@csgroup.eu>
 <323f83c7-38fe-8a12-d77a-0a7249aad316@efficios.com>
 <dfe0b9ba-828d-e1a5-f9a3-416c6b5b1cf3@efficios.com>
 <87mt81sbxb.fsf@mpe.ellerman.id.au>
 <484763aa-e77b-b599-4786-ef4cdf16d7bd@efficios.com>
 <87cz8wrmm6.fsf@mpe.ellerman.id.au>
 <6db50470-ac37-0328-37a2-760665668b5f@efficios.com>
MIME-Version: 1.0
Content-Type: text/plain; charset=us-ascii
Content-Disposition: inline
In-Reply-To: <6db50470-ac37-0328-37a2-760665668b5f@efficios.com>
User-Agent: Mutt/1.10.1 (2018-07-13)
Precedence: bulk

Hello,

On Wed, Dec 07, 2022 at 10:18:13AM -0500, Mathieu Desnoyers wrote:
> On 2022-12-06 21:09, Michael Ellerman wrote:
> > Mathieu Desnoyers <mathieu.desnoyers@efficios.com> writes:
> > > On 2022-12-05 17:50, Michael Ellerman wrote:

> > 
> > Relatedly we have a patch in next to optionally use ABIv2 for 64-bit big
> > endian builds.
> 
> Interesting. Does it require a matching user-space ? (built with PPC64 ABIv2

No, the kernel and userspace ABI is separate.

> ?) Does it handle legacy PPC32 executables ?

Theoretically it should. No idea if anybody has tested it.

Thanks

Michal