linux-kernel - Re: [PATCH v2 25/31] arm64: Performance counters support

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-Id: <201208151511.11612.arnd@arndb.de>
Date:	Wed, 15 Aug 2012 15:11:11 +0000
From:	Arnd Bergmann <arnd@...db.de>
To:	Catalin Marinas <catalin.marinas@....com>
Cc:	linux-arch@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
	linux-kernel@...r.kernel.org, Will Deacon <will.deacon@....com>
Subject: Re: [PATCH v2 25/31] arm64: Performance counters support

On Tuesday 14 August 2012, Catalin Marinas wrote:
> From: Will Deacon <will.deacon@....com>
> 
> This patch adds support for the AArch64 performance counters.
> 
> Signed-off-by: Will Deacon <will.deacon@....com>
> Signed-off-by: Catalin Marinas <catalin.marinas@....com>
> ---
>  arch/arm64/include/asm/perf_event.h |   22 +
>  arch/arm64/include/asm/pmu.h        |   82 +++
>  arch/arm64/kernel/perf_event.c      | 1368 +++++++++++++++++++++++++++++++++++
>  tools/perf/perf.h                   |    6 +

Can you explain how AArch64 performance counters differ from the 32
bit ones? Do they work for AArch32 user space under AArch64 kernels?
Is it possible to share parts of the implementation with arch/arm?

	Arnd
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/