From: Christoph Hellwig <hch@infradead.org>
To: Juergen Gross <jgross@suse.com>
Cc: xen-devel@lists.xenproject.org, x86@kernel.org,
linux-kernel@vger.kernel.org, intel-gfx@lists.freedesktop.org,
dri-devel@lists.freedesktop.org, jbeulich@suse.com,
Thomas Gleixner <tglx@linutronix.de>,
Ingo Molnar <mingo@redhat.com>, Borislav Petkov <bp@alien8.de>,
Dave Hansen <dave.hansen@linux.intel.com>,
"H. Peter Anvin" <hpa@zytor.com>,
Andy Lutomirski <luto@kernel.org>,
Peter Zijlstra <peterz@infradead.org>,
Jani Nikula <jani.nikula@linux.intel.com>,
Joonas Lahtinen <joonas.lahtinen@linux.intel.com>,
Rodrigo Vivi <rodrigo.vivi@intel.com>,
Tvrtko Ursulin <tvrtko.ursulin@linux.intel.com>,
David Airlie <airlied@linux.ie>, Daniel Vetter <daniel@ffwll.ch>
Subject: Re: [PATCH 2/2] x86/pat: add functions to query specific cache mode availability
Date: Wed, 18 May 2022 06:45:10 -0700 [thread overview]
Message-ID: <YoT4Zk/SxBgadq2b@infradead.org> (raw)
In-Reply-To: <20220503132207.17234-3-jgross@suse.com>
On Tue, May 03, 2022 at 03:22:07PM +0200, Juergen Gross wrote:
> Some drivers are using pat_enabled() in order to test availability of
> special caching modes (WC and UC-). This will lead to false negatives
> in case the system was booted e.g. with the "nopat" variant and the
> BIOS did setup the PAT MSR supporting the queried mode, or if the
> system is running as a Xen PV guest.
>
> Add test functions for those caching modes instead and use them at the
> appropriate places.
>
> For symmetry reasons export the already existing x86_has_pat_wp() for
> modules, too.
No, we never export unused functionality.
next prev parent reply other threads:[~2022-05-18 13:45 UTC|newest]
Thread overview: 41+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-05-03 13:22 [PATCH 0/2] x86/pat: fix querying available caching modes Juergen Gross
2022-05-03 13:22 ` [PATCH 1/2] x86/pat: fix x86_has_pat_wp() Juergen Gross
2022-05-27 10:21 ` Juergen Gross
2022-06-14 15:09 ` Juergen Gross
2022-06-20 5:22 ` Thorsten Leemhuis
2022-06-20 5:30 ` Juergen Gross
2022-06-20 6:15 ` Thorsten Leemhuis
2022-06-20 10:26 ` Borislav Petkov
2022-06-20 10:41 ` Juergen Gross
2022-06-20 15:27 ` Dave Hansen
2022-06-20 15:34 ` Juergen Gross
2022-05-03 13:22 ` [PATCH 2/2] x86/pat: add functions to query specific cache mode availability Juergen Gross
2022-05-04 8:31 ` Jan Beulich
2022-05-04 9:14 ` Juergen Gross
2022-05-04 9:51 ` Jan Beulich
2022-05-20 4:43 ` Chuck Zmudzinski
2022-05-20 5:56 ` Chuck Zmudzinski
2022-05-20 6:05 ` Jan Beulich
2022-05-20 6:59 ` Chuck Zmudzinski
2022-05-20 8:30 ` Chuck Zmudzinski
2022-05-20 9:41 ` Jan Beulich
2022-05-20 13:33 ` Chuck Zmudzinski
2022-05-20 14:06 ` Jan Beulich
2022-05-20 14:48 ` Chuck Zmudzinski
2022-05-21 10:47 ` Thorsten Leemhuis
2022-05-24 18:32 ` Chuck Zmudzinski
2022-05-25 7:45 ` Thorsten Leemhuis
2022-05-25 8:04 ` Juergen Gross
2022-05-25 8:37 ` Jan Beulich
2022-05-25 8:51 ` Thorsten Leemhuis
2022-05-25 19:25 ` Chuck Zmudzinski
2022-05-20 15:46 ` [REGRESSION} " Chuck Zmudzinski
2022-05-20 17:13 ` Chuck Zmudzinski
2022-05-20 17:17 ` Chuck Zmudzinski
2022-05-18 13:45 ` Christoph Hellwig [this message]
2022-05-20 2:15 ` Chuck Zmudzinski
2022-05-20 2:21 ` Chuck Zmudzinski
2022-05-21 13:24 ` Chuck Zmudzinski
2022-07-11 9:46 ` [tip: x86/urgent] x86/pat: Fix x86_has_pat_wp() tip-bot2 for Juergen Gross
2022-07-13 10:45 ` tip-bot2 for Juergen Gross
2022-07-13 10:52 ` tip-bot2 for Juergen Gross
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=YoT4Zk/SxBgadq2b@infradead.org \
--to=hch@infradead.org \
--cc=airlied@linux.ie \
--cc=bp@alien8.de \
--cc=daniel@ffwll.ch \
--cc=dave.hansen@linux.intel.com \
--cc=dri-devel@lists.freedesktop.org \
--cc=hpa@zytor.com \
--cc=intel-gfx@lists.freedesktop.org \
--cc=jani.nikula@linux.intel.com \
--cc=jbeulich@suse.com \
--cc=jgross@suse.com \
--cc=joonas.lahtinen@linux.intel.com \
--cc=linux-kernel@vger.kernel.org \
--cc=luto@kernel.org \
--cc=mingo@redhat.com \
--cc=peterz@infradead.org \
--cc=rodrigo.vivi@intel.com \
--cc=tglx@linutronix.de \
--cc=tvrtko.ursulin@linux.intel.com \
--cc=x86@kernel.org \
--cc=xen-devel@lists.xenproject.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