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From: Toshi Kani <toshi.kani@hpe.com>
To: Borislav Petkov <bp@suse.de>
Cc: jgross@suse.com, 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 4/6] x86/mtrr: Fix PAT init handling when MTRR MSR is disabled
Date: Tue, 22 Mar 2016 16:02:13 -0600	[thread overview]
Message-ID: <1458684133.6393.630.camel__2511.52405185184$1458681076$gmane$org@hpe.com> (raw)
In-Reply-To: <20160322170135.GE5656@pd.tnic>

On Tue, 2016-03-22 at 18:01 +0100, Borislav Petkov wrote:
> Subject: [PATCH v2 4/6] x86/mtrr: Fix PAT init handling when MTRR MSR is
> disabled
> 
> s/ MSR//

Will do.

> On Wed, Mar 16, 2016 at 06:46:57PM -0600, Toshi Kani wrote:
> > get_mtrr_state() calls pat_init() on BSP even if MTRR is disabled
> > by its MSR.
> 
> s/by its MSR//

Will do.

> > This causes pat_init() to be called on BSP only since APs do not call
> 
> This doesn't cause that - get_mtrr_state() is called only on the BSP by
> mtrr_bp_init().

Right, I will change it to "results" or something.

> > pat_init() when MTRR is disabled. This inconsistency between BSP and
> > APs leads undefined behavior.
> 
>       leads to

Will do.

> > Move BSP's PAT init code from get_mtrr_state() to mtrr_bp_pat_init().
> > Change mtrr_bp_init() to call mtrr_bp_pat_init() if MTRR is enabled.
> 
> No need for those.

OK.

> > This keeps BSP's calling condition to pat_init() consistent with AP's,
> > mtrr_ap_init() and mtrr_aps_init().
> 
> This one is fine.

:-)

Thanks,
-Toshi

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  parent reply	other threads:[~2016-03-22 21:09 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 [this message]
     [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
     [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

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