From: Borislav Petkov <bp@suse.de>
To: Toshi Kani <toshi.kani@hpe.com>, jgross@suse.com
Cc: mcgrof@suse.com, x86@kernel.org, linux-kernel@vger.kernel.org,
paul.gortmaker@windriver.com, hpa@zytor.com,
xen-devel@lists.xenproject.org, tglx@linutronix.de,
mingo@kernel.org, elliott@hpe.com
Subject: Re: [PATCH v2 5/6] x86/xen, pat: Remove PAT table init code from Xen
Date: Tue, 22 Mar 2016 18:02:06 +0100 [thread overview]
Message-ID: <20160322170206.GF5656__42544.3564112813$1458666198$gmane$org@pd.tnic> (raw)
In-Reply-To: <1458175619-32206-4-git-send-email-toshi.kani@hpe.com>
On Wed, Mar 16, 2016 at 06:46:58PM -0600, Toshi Kani wrote:
> Xen supports PAT without MTRR for its guests. In order to
> enable WC attribute, it was necessary for xen_start_kernel()
> to call pat_init_cache_modes() to update PAT table before
> starting guest kernel.
>
> Now that the kernel initializes PAT table to the BIOS handoff
> state when MTRR is disabled, this Xen-specific PAT init code
> is no longer necessary. Delete it from xen_start_kernel().
>
> Also change pat_init_cache_modes() to a static function since
> PAT table should not be tweaked by other modules.
>
> Signed-off-by: Toshi Kani <toshi.kani@hpe.com>
> Cc: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
> Cc: Borislav Petkov <bp@suse.de>
> Cc: Luis R. Rodriguez <mcgrof@suse.com>
> Cc: Juergen Gross <jgross@suse.com>
> Cc: Ingo Molnar <mingo@kernel.org>
> Cc: H. Peter Anvin <hpa@zytor.com>
> Cc: Thomas Gleixner <tglx@linutronix.de>
> ---
> arch/x86/include/asm/pat.h | 1 -
> arch/x86/mm/pat.c | 2 +-
> arch/x86/xen/enlighten.c | 9 ---------
> 3 files changed, 1 insertion(+), 11 deletions(-)
Jürgen, ack?
--
Regards/Gruss,
Boris.
SUSE Linux GmbH, GF: Felix Imendörffer, Jane Smithard, Graham Norton, HRB 21284 (AG Nürnberg)
--
_______________________________________________
Xen-devel mailing list
Xen-devel@lists.xen.org
http://lists.xen.org/xen-devel
next prev parent reply other threads:[~2016-03-22 17:02 UTC|newest]
Thread overview: 20+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-03-17 0:46 [PATCH v2 2/6] x86/mm/pat: Add pat_disable() interface Toshi Kani
2016-03-17 0:46 ` [PATCH v2 3/6] x86/mtrr: Fix Xorg crashes in Qemu sessions Toshi Kani
2016-03-17 0:46 ` [PATCH v2 4/6] x86/mtrr: Fix PAT init handling when MTRR MSR is disabled Toshi Kani
2016-03-17 0:46 ` [PATCH v2 5/6] x86/xen, pat: Remove PAT table init code from Xen Toshi Kani
2016-03-17 0:46 ` [PATCH v2 6/6] x86/pat: Document PAT initializations Toshi Kani
2016-03-22 16:59 ` [PATCH v2 2/6] x86/mm/pat: Add pat_disable() interface Borislav Petkov
[not found] ` <1458175619-32206-2-git-send-email-toshi.kani@hpe.com>
2016-03-22 17:00 ` [PATCH v2 3/6] x86/mtrr: Fix Xorg crashes in Qemu sessions Borislav Petkov
[not found] ` <20160322170047.GD5656@pd.tnic>
2016-03-22 21:53 ` Toshi Kani
[not found] ` <1458683610.6393.624.camel@hpe.com>
2016-03-23 8:44 ` Borislav Petkov
[not found] ` <20160323084437.GB8031@pd.tnic>
2016-03-23 15:53 ` Toshi Kani
[not found] ` <1458748393.6393.653.camel@hpe.com>
2016-03-23 21:47 ` Toshi Kani
[not found] ` <1458175619-32206-3-git-send-email-toshi.kani@hpe.com>
2016-03-22 17:01 ` [PATCH v2 4/6] x86/mtrr: Fix PAT init handling when MTRR MSR is disabled Borislav Petkov
[not found] ` <20160322170135.GE5656@pd.tnic>
2016-03-22 22:02 ` Toshi Kani
[not found] ` <1458175619-32206-4-git-send-email-toshi.kani@hpe.com>
2016-03-22 17:02 ` Borislav Petkov [this message]
[not found] ` <20160322170206.GF5656@pd.tnic>
2016-03-23 6:08 ` [PATCH v2 5/6] x86/xen, pat: Remove PAT table init code from Xen Juergen Gross
[not found] ` <1458175619-32206-5-git-send-email-toshi.kani@hpe.com>
2016-03-22 17:02 ` [PATCH v2 6/6] x86/pat: Document PAT initializations Borislav Petkov
[not found] ` <20160322170222.GG5656@pd.tnic>
2016-03-22 22:15 ` Toshi Kani
[not found] ` <20160322165944.GC5656@pd.tnic>
2016-03-22 21:40 ` [PATCH v2 2/6] x86/mm/pat: Add pat_disable() interface Toshi Kani
[not found] ` <1458682845.6393.614.camel@hpe.com>
2016-03-23 8:51 ` Borislav Petkov
[not found] ` <20160323085141.GC8031@pd.tnic>
2016-03-23 15:49 ` Toshi Kani
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='20160322170206.GF5656__42544.3564112813$1458666198$gmane$org@pd.tnic' \
--to=bp@suse.de \
--cc=elliott@hpe.com \
--cc=hpa@zytor.com \
--cc=jgross@suse.com \
--cc=linux-kernel@vger.kernel.org \
--cc=mcgrof@suse.com \
--cc=mingo@kernel.org \
--cc=paul.gortmaker@windriver.com \
--cc=tglx@linutronix.de \
--cc=toshi.kani@hpe.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;
as well as URLs for NNTP newsgroup(s).