xen-devel.lists.xenproject.org archive mirror
 help / color / mirror / Atom feed
From: Juergen Gross <jgross@suse.com>
To: Borislav Petkov <bp@suse.de>, Toshi Kani <toshi.kani@hpe.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: Wed, 23 Mar 2016 07:08:14 +0100	[thread overview]
Message-ID: <56F232CE.8010706__34729.7184089713$1458713369$gmane$org@suse.com> (raw)
In-Reply-To: <20160322170206.GF5656@pd.tnic>

On 22/03/16 18:02, Borislav Petkov wrote:
> 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?

Yes, seems to be okay.

Acked-by: Juergen Gross <jgross@suse.com>


Juergen


_______________________________________________
Xen-devel mailing list
Xen-devel@lists.xen.org
http://lists.xen.org/xen-devel

  parent reply	other threads:[~2016-03-23  6:08 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   ` [PATCH v2 5/6] x86/xen, pat: Remove PAT table init code from Xen Borislav Petkov
     [not found]   ` <20160322170206.GF5656@pd.tnic>
2016-03-23  6:08     ` Juergen Gross [this message]
     [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='56F232CE.8010706__34729.7184089713$1458713369$gmane$org@suse.com' \
    --to=jgross@suse.com \
    --cc=bp@suse.de \
    --cc=elliott@hpe.com \
    --cc=hpa@zytor.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 \
    --subject='Re: [PATCH v2 5/6] x86/xen, pat: Remove PAT table init code from Xen' \
    /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

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).