linux-kernel - Re: [PATCH v2 0/5] arm64: perf: Support for chained counters

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: <3cbe09d3-7878-d53d-0918-dfb38ac89353@arm.com>
Date:   Tue, 5 Jun 2018 16:00:39 +0100
From:   Julien Thierry <julien.thierry@....com>
To:     Suzuki K Poulose <suzuki.poulose@....com>,
        linux-arm-kernel@...ts.infradead.org
Cc:     linux-kernel@...r.kernel.org, will.deacon@....com,
        mark.rutland@....com, robin.murphy@....com
Subject: Re: [PATCH v2 0/5] arm64: perf: Support for chained counters



On 29/05/18 11:55, Suzuki K Poulose wrote:
> This series adds support for counting PMU events using 64bit counters
> for arm64 PMU.
> 
> The Arm v8 PMUv3 supports combining two adjacent 32bit counters
> (low even and hig odd counters) to count a given "event" in 64bit mode.
> This series adds the support for 64bit events in the core arm_pmu driver
> infrastructure and adds the support for armv8 64bit kernel PMU to use
> chained counters to count in 64bit mode. For CPU cycles, we use the cycle
> counter in 64bit mode, when requested. If the cycle counter is not available,
> we fall back to chaining the counters.
> 
> Tested on Juno, Fast models. Applies on 4.17-rc4
> 

For the series:

Reviewed-by: Julien Thierry <julien.thierry@....com>

-- 
Julien Thierry