From: Rik van Riel <riel@surriel.com>
To: Borislav Petkov <bp@kernel.org>, X86 <x86@kernel.org>
Cc: LKML <linux-kernel@vger.kernel.org>,
"Borislav Petkov (AMD)" <bp@alien8.de>,
stable@kernel.org
Subject: Re: [PATCH] x86/CPU/AMD: Fix AMD TLBI Erratum #1718
Date: Fri, 02 Oct 2026 20:31:30 -0400 [thread overview]
Message-ID: <4746af392d093deb08101530be1c870f277a182b.camel@surriel.com> (raw)
In-Reply-To: <20261002211617.1001617-1-bp@kernel.org>
On Fri, 2026-10-02 at 14:16 -0700, Borislav Petkov wrote:
> From: "Borislav Petkov (AMD)" <bp@alien8.de>
>
> The processor may fail to invalidate a TLB entry while executing an
> INVLPGB/TLBSYNC instruction pair.
>
> Detect the erratum and apply a software workaround when a microcode
> fix
> is not present.
>
> Fixes: 82378c6c2f43 ("x86/mm: Use INVLPGB for kernel TLB flushes")
> Signed-off-by: Borislav Petkov (AMD) <bp@alien8.de>
> Cc: <stable@kernel.org>
>
This same change fell out of my testing with
a reproducer earlier this year, so I know it
works, at least for the test case I have.
I am surprised that it was good enough to be
a real workaround, but I'll take it ;)
Tested-by: Rik van Riel <riel@surriel.com>
Reviewed-by: Rik van Riel <riel@surriel.com>
--
All Rights Reversed.
next prev parent reply other threads:[~2026-10-03 0:31 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-10-02 21:16 Borislav Petkov
2026-10-03 0:31 ` Rik van Riel [this message]
2026-10-03 0:44 ` Borislav Petkov
2026-10-03 21:24 ` Lorenzo Stoakes (ARM)
2026-10-03 21:44 ` Borislav Petkov
2026-10-05 17:42 ` [tip: x86/urgent] " tip-bot2 for Borislav Petkov (AMD)
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=4746af392d093deb08101530be1c870f277a182b.camel@surriel.com \
--to=riel@surriel.com \
--cc=bp@alien8.de \
--cc=bp@kernel.org \
--cc=linux-kernel@vger.kernel.org \
--cc=stable@kernel.org \
--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
all inboxes | Powered by JetHome®