From: Toshi Kani <toshi.kani@hp.com>
To: Borislav Petkov <bp@alien8.de>
Cc: jgross@suse.com, Andrew Morton <akpm@linux-foundation.org>,
Andy Lutomirski <luto@amacapital.net>,
arnd@arndb.de, Elliott@hp.com, hch@lst.de, hmh@hmh.eng.br,
"H. Peter Anvin" <hpa@zytor.com>, Ingo Molnar <mingo@redhat.com>,
konrad.wilk@oracle.com, linux-mm <linux-mm@kvack.org>,
linux-nvdimm@lists.01.org, "Luis R. Rodriguez" <mcgrof@suse.com>,
stefan.bader@canonical.com, Thomas Gleixner <tglx@linutronix.de>,
x86-ml <x86@kernel.org>,
yigal@plexistor.com, lkml <linux-kernel@vger.kernel.org>
Subject: Re: [PATCH 2/4] x86/pat: Merge pat_init_cache_modes() into its caller
Date: Mon, 01 Jun 2015 12:15:54 -0600 [thread overview]
Message-ID: <1433182554.23540.112.camel@misato.fc.hp.com> (raw)
In-Reply-To: <20150531102338.GB20440@pd.tnic>
On Sun, 2015-05-31 at 12:23 +0200, Borislav Petkov wrote:
> On Sun, May 31, 2015 at 11:48:04AM +0200, Borislav Petkov wrote:
> > From: Borislav Petkov <bp@suse.de>
> >
> > This way we can pass pat MSR value directly.
>
> This breaks xen as that function is used there, doh. :-\
>
> JA 1/4 rgen,
>
> can you check the enlighten.c changes below please?
>
> I'm reading xen's PAT config from MSR_IA32_CR_PAT and handing it down to
> pat_init_cache_modes(). That shouldn't change current behavior AFAICT
> because pat_init_cache_modes() did it itself before.
>
> Right?
>
> Thanks.
>
> ---
> Author: Borislav Petkov <bp@suse.de>
> Date: Sat May 30 13:09:55 2015 +0200
>
> x86/pat: Emulate PAT when it is disabled
>
> In the case when PAT is disabled on the command line with "nopat" or
> when virtualization doesn't support PAT (correctly) - see
>
> 9d34cfdf4796 ("x86: Don't rely on VMWare emulating PAT MSR correctly").
>
> we emulate it using the PWT and PCD cache attribute bits. Get rid of
> boot_pat_state while at it.
>
> Based on a conglomerate patch from Toshi Kani.
>
> Signed-off-by: Borislav Petkov <bp@suse.de>
Reviewed-by: Toshi Kani <toshi.kani@hp.com>
Thanks,
-Toshi
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next prev parent reply other threads:[~2015-06-01 18:35 UTC|newest]
Thread overview: 30+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-05-29 22:58 [PATCH v11 0/12] Support Write-Through mapping on x86 Toshi Kani
2015-05-29 22:58 ` [PATCH v11 1/12] x86, mm, pat: Cleanup init flags in pat_init() Toshi Kani
2015-05-29 22:59 ` [PATCH v11 2/12] x86, mm, pat: Refactor !pat_enabled handling Toshi Kani
2015-05-31 9:46 ` Borislav Petkov
2015-05-31 9:48 ` [PATCH 1/4] x86/pat: Untangle pat_init() Borislav Petkov
2015-05-31 9:48 ` [PATCH 2/4] x86/pat: Merge pat_init_cache_modes() into its caller Borislav Petkov
2015-05-31 10:15 ` Juergen Gross
2015-05-31 10:24 ` Borislav Petkov
2015-05-31 10:23 ` Borislav Petkov
2015-05-31 11:02 ` Juergen Gross
2015-06-01 18:15 ` Toshi Kani [this message]
2015-05-31 9:48 ` [PATCH 3/4] x86/pat: Emulate PAT when it is disabled Borislav Petkov
2015-05-31 9:48 ` [PATCH 4/4] x86/pat: Remove pat_enabled() checks Borislav Petkov
2015-06-01 18:26 ` Toshi Kani
2015-06-01 18:51 ` Borislav Petkov
2015-06-01 16:17 ` [PATCH 1/4] x86/pat: Untangle pat_init() Toshi Kani
2015-06-01 15:50 ` [PATCH v11 2/12] x86, mm, pat: Refactor !pat_enabled handling Toshi Kani
2015-05-29 22:59 ` [PATCH v11 3/12] x86, mm, pat: Set WT to PA7 slot of PAT MSR Toshi Kani
2015-05-29 22:59 ` [PATCH v11 4/12] x86, mm, pat: Change reserve_memtype() for WT Toshi Kani
2015-05-29 22:59 ` [PATCH v11 5/12] x86, asm: Change is_new_memtype_allowed() " Toshi Kani
2015-05-29 22:59 ` [PATCH v11 6/12] x86, mm, asm-gen: Add ioremap_wt() " Toshi Kani
2015-05-30 9:18 ` Geert Uytterhoeven
2015-05-31 0:58 ` Toshi Kani
2015-05-29 22:59 ` [PATCH v11 7/12] arch/*/asm/io.h: Add ioremap_wt() to all architectures Toshi Kani
2015-05-29 22:59 ` [PATCH v11 8/12] video/fbdev, asm/io.h: Remove ioremap_writethrough() Toshi Kani
2015-05-29 22:59 ` [PATCH v11 9/12] x86, mm, pat: Add pgprot_writethrough() for WT Toshi Kani
2015-05-29 22:59 ` [PATCH v11 10/12] x86, mm, asm: Add WT support to set_page_memtype() Toshi Kani
2015-05-29 22:59 ` [PATCH v11 11/12] x86, mm: Add set_memory_wt() for WT Toshi Kani
2015-05-29 22:59 ` [PATCH v11 12/12] drivers/block/pmem: Map NVDIMM with ioremap_wt() Toshi Kani
2015-05-30 1:18 ` Dan Williams
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