linux-kernel - Re: [PATCH v5 0/4] perf: AARCH64 arch support

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Message-ID: <CAFrcx1kgxYJX6HvRSivZxShPrj8S3YsHUWwMkzD8dumxmE5z2w@mail.gmail.com>
Date:	Mon, 3 Feb 2014 19:22:42 +0100
From:	Jean Pihet <jean.pihet@...aro.org>
To:	Will Deacon <will.deacon@....com>,
	Arnaldo <acme@...stprotocols.net>
Cc:	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"linaro-kernel@...ts.linaro.org" <linaro-kernel@...ts.linaro.org>,
	"linux-arm-kernel@...ts.infradead.org" 
	<linux-arm-kernel@...ts.infradead.org>,
	Ingo Molnar <mingo@...nel.org>, Jiri Olsa <jolsa@...hat.com>,
	"patches@...aro.org" <patches@...aro.org>
Subject: Re: [PATCH v5 0/4] perf: AARCH64 arch support

Hi Will, Arnaldo,

On 24 January 2014 17:35, Will Deacon <will.deacon@....com> wrote:
> Hi Jean,
>
> On Wed, Jan 22, 2014 at 02:11:15PM +0000, Jean Pihet wrote:
>> Add AARCH64 specific support. This includes the following:
>> - AARCH64 perf registers definition and hooks,
>> - compat mode registers use, i.e. profiling a 32-bit binary on
>>    a 64-bit system,
>> - unwinding using the dwarf information from the .debug_frame
>>    section of the ELF binary,
>> - unwinding using the frame pointer information; in 64-bit and
>>    compat modes.
>>
>> Note: support for unwinding using the dwarf information in compat
>> mode requires some changes to the libunwind code. Those changes
>> have been submitted on the libunwind ML and are in discussion.
>>
>> Tested on ARMv7, ARMv8 and x86_64 platforms. The compat mode has been
>> tested on ARMv8 using statically built 32-bit binaries.
>
> This is look alright to me now, but there are still two blockers:
>
>  (1) Getting the libunwind code merged
This one is independent of the kernel changes. The libunwind stuff is
under disuccsion atm, cf. libunwind ML.

>  (2) Splitting this into an arch/arm64 series and a tools/perf series, so
>      that acme can merge the latter independently (and avoid the mess we had
>      last time).
Split into:
- the tools/perf change: '[PATCH] perf: ARM64: wire up perf_regs and
unwind support'
and
- the arch/arm64 changes: '[PATCH v6 0/3] perf: AARCH64 arch support'.


>
> Anyway, for the series:
>
>   Acked-by: Will Deacon <will.deacon@....com>
Thanks! I have added your Acked-By in the series.

>
> Will

Jean
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