From: Borislav Petkov <bp@alien8.de>
To: Andrew Cooper <andrew.cooper3@citrix.com>
Cc: Tavis Ormandy <taviso@gmail.com>,
linux-kernel@vger.kernel.org, x86@kernel.org
Subject: Re: x86: AMD Zen2 ymm registers rolling back
Date: Wed, 22 Feb 2023 23:26:46 +0100 [thread overview]
Message-ID: <Y/aWputqWVAN0cJt@zn.tnic> (raw)
In-Reply-To: <f074e03d-a991-23cd-80d7-162067143034@citrix.com>
On Wed, Feb 22, 2023 at 10:17:35PM +0000, Andrew Cooper wrote:
> I don't see anything in your code which would cause a change in MXCSR.
> Which most likely means there's a path in the kernel modifying MXCSR and
> that doesn't sound like a thing that ought to be happening by default.
We were just talking about this internally too. We could trace it to see
what fiddles with MXCSR but meh, bigger fish to fry.
--
Regards/Gruss,
Boris.
https://people.kernel.org/tglx/notes-about-netiquette
next prev parent reply other threads:[~2023-02-22 22:26 UTC|newest]
Thread overview: 29+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-02-22 6:40 x86: AMD Zen2 ymm registers rolling back Tavis Ormandy
2023-02-22 8:33 ` Borislav Petkov
2023-02-22 9:14 ` Borislav Petkov
2023-02-22 9:38 ` Andrew Cooper
2023-02-22 10:09 ` Borislav Petkov
2023-02-22 21:26 ` Tavis Ormandy
2023-02-22 22:17 ` Andrew Cooper
2023-02-22 22:26 ` Borislav Petkov [this message]
2023-02-22 22:25 ` Borislav Petkov
2023-02-28 18:47 ` Alexander Monakov
2023-02-28 19:20 ` Borislav Petkov
2023-02-28 19:24 ` Alexander Monakov
2023-02-28 19:25 ` Borislav Petkov
2023-02-28 19:29 ` Alexander Monakov
2023-02-28 19:38 ` Andrew Cooper
2023-02-28 21:45 ` Alexander Monakov
2023-02-28 20:56 ` Borislav Petkov
2023-02-28 21:16 ` Alexander Monakov
2023-03-01 0:23 ` Andrew Cooper
2023-03-01 8:54 ` Borislav Petkov
2023-03-07 16:45 ` Tavis Ormandy
2023-03-07 17:46 ` [PATCH] x86/amd: Work around Erratum 1386 - XSAVES malfunction on context switch Andrew Cooper
2023-03-07 17:50 ` Borislav Petkov
2023-03-07 18:22 ` Andrew Cooper
2023-03-07 18:56 ` Borislav Petkov
2023-03-07 20:01 ` Andrew Cooper
2023-03-07 20:09 ` Borislav Petkov
2023-03-14 16:01 ` Dave Hansen
2023-03-08 16:23 ` [tip: x86/urgent] x86/CPU/AMD: Disable XSAVES on AMD family 0x17 tip-bot2 for Andrew Cooper
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=Y/aWputqWVAN0cJt@zn.tnic \
--to=bp@alien8.de \
--cc=andrew.cooper3@citrix.com \
--cc=linux-kernel@vger.kernel.org \
--cc=taviso@gmail.com \
--cc=x86@kernel.org \
/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 a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox