From: will.deacon@arm•com (Will Deacon)
To: linux-arm-kernel@lists•infradead.org
Subject: [PATCH] arm64: Add workaround for Cavium erratum 27456
Date: Wed, 10 Feb 2016 09:28:23 +0000 [thread overview]
Message-ID: <20160210092822.GA1052@arm.com> (raw)
In-Reply-To: <1455046156-10582-1-git-send-email-ddaney.cavm@gmail.com>
On Tue, Feb 09, 2016 at 11:29:16AM -0800, David Daney wrote:
> From: Andrew Pinski <apinski@cavium•com>
>
> On ThunderX T88 pass 1.x through 2.1 parts, broadcast TLBI
> instructions may cause the icache to become invalid if it contains
> data for a non-current ASID.
>
> This patch implements the workaround (which flushes the local icache
> when switching the mm) by using code patching.
So, to be clear, is this "just" a performance problem as opposed to a
correctness issue? If so, do you have any numbers with and without this
change?
Will
next prev parent reply other threads:[~2016-02-10 9:28 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-02-09 19:29 [PATCH] arm64: Add workaround for Cavium erratum 27456 David Daney
2016-02-09 19:52 ` Marc Zyngier
2016-02-09 19:59 ` David Daney
2016-02-09 20:07 ` Marc Zyngier
2016-02-10 9:28 ` Will Deacon [this message]
2016-02-10 18:08 ` David Daney
2016-02-10 18:15 ` Will Deacon
2016-02-10 18:42 ` David Daney
2016-02-11 13:07 ` Will Deacon
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=20160210092822.GA1052@arm.com \
--to=will.deacon@arm$(echo .)com \
--cc=linux-arm-kernel@lists$(echo .)infradead.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox