All of lore.kernel.org
 help / color / mirror / Atom feed
From: Leo Yan <leo.yan@linaro.org>
To: Marc Jorda <marc.jorda@bsc.es>, James Clark <James.Clark@arm.com>,
	Al Grant <Al.Grant@arm.com>
Cc: linux-perf-users@vger.kernel.org
Subject: Re: Available Arm CPUs with SPE
Date: Fri, 25 Nov 2022 20:26:18 +0800	[thread overview]
Message-ID: <Y4C0RkbpGP4KX36C@leoy-yangtze.lan> (raw)
In-Reply-To: <2695ecbe-816e-eab7-8da2-30e0f62ae926@bsc.es>

On Fri, Nov 25, 2022 at 12:17:18PM +0100, Marc Jorda wrote:
> Hello,
> 
> I am trying to know which currently available Arm CPUs implement the
> Statistical Profiling Extension (SPE), does anyone know where can I find
> such information?

I don't know we have such kind of info, usually the most safe way is
to check SoC vendor's spec and confirm if Arm SPE is supported or not.

> As far as I know, it is an optional extension in Armv8.2, but I don't know
> if it is mandatory for newer versions. Is it correct to assume that all Arm
> Neoverse CPUs have this extension?

Yes, since SPE is an optional extension, my understanding is we cannot
100% say SPE is implemented in Armv8.2 and upwards CPUs (though it's
unlikely not to implement SPE in Arm standard CPUs).

To avoid to mislead you, I would like loop in James and Al for more
reliable answer.

Thanks,
Leo

  parent reply	other threads:[~2022-11-25 12:26 UTC|newest]

Thread overview: 5+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2022-11-25 11:17 Available Arm CPUs with SPE Marc Jorda
2022-11-25 12:01 ` James Clark
2022-11-25 12:26 ` Leo Yan [this message]
2022-11-25 21:06   ` Al Grant
2022-11-28 11:02     ` Marc Jorda

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=Y4C0RkbpGP4KX36C@leoy-yangtze.lan \
    --to=leo.yan@linaro.org \
    --cc=Al.Grant@arm.com \
    --cc=James.Clark@arm.com \
    --cc=linux-perf-users@vger.kernel.org \
    --cc=marc.jorda@bsc.es \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line before the message body. 
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.