From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-ob0-f174.google.com (mail-ob0-f174.google.com [209.85.214.174]) by kanga.kvack.org (Postfix) with ESMTP id 361726B0037 for ; Wed, 10 Sep 2014 13:02:27 -0400 (EDT) Received: by mail-ob0-f174.google.com with SMTP id uz6so13445548obc.33 for ; Wed, 10 Sep 2014 10:02:26 -0700 (PDT) Received: from g5t1625.atlanta.hp.com (g5t1625.atlanta.hp.com. [15.192.137.8]) by mx.google.com with ESMTPS id ns6si23158439obc.22.2014.09.10.10.02.26 for (version=TLSv1 cipher=RC4-SHA bits=128/128); Wed, 10 Sep 2014 10:02:26 -0700 (PDT) From: Toshi Kani Subject: [PATCH v2 0/6] Support Write-Through mapping on x86 Date: Wed, 10 Sep 2014 10:51:44 -0600 Message-Id: <1410367910-6026-1-git-send-email-toshi.kani@hp.com> Sender: owner-linux-mm@kvack.org List-ID: To: hpa@zytor.com, tglx@linutronix.de, mingo@redhat.com, akpm@linux-foundation.org, arnd@arndb.de Cc: linux-mm@kvack.org, linux-kernel@vger.kernel.org, jgross@suse.com, stefan.bader@canonical.com, luto@amacapital.net, hmh@hmh.eng.br, yigal@plexistor.com, konrad.wilk@oracle.com This patchset adds support of Write-Through (WT) mapping on x86. The study below shows that using WT mapping may be useful for non-volatile memory. http://www.hpl.hp.com/techreports/2012/HPL-2012-236.pdf This patchset applies on top of the Juergen's patchset below, which provides the basis of the PAT management. https://lkml.org/lkml/2014/9/8/55 All new/modified interfaces have been tested. v2: - Changed WT to use slot 7 of the PAT MSR. (H. Peter Anvin, Andy Lutomirski) - Changed to have conservative checks to exclude all Pentium 2, 3, M, and 4 families. (Ingo Molnar, Henrique de Moraes Holschuh, Andy Lutomirski) - Updated documentation to cover WT interfaces and usages. (Andy Lutomirski, Yigal Korman) --- Toshi Kani (6): 1/6 x86, mm, pat: Set WT to PA4 slot of PAT MSR 2/6 x86, mm, pat: Change reserve_memtype() to handle WT 3/6 x86, mm, asm-gen: Add ioremap_wt() for WT 4/6 x86, mm: Add set_memory_wt() for WT 5/6 x86, mm, pat: Add pgprot_writethrough() for WT 6/6 x86, pat: Update documentation for WT changes --- Documentation/x86/pat.txt | 14 +++++-- arch/x86/include/asm/cacheflush.h | 10 ++++- arch/x86/include/asm/io.h | 2 + arch/x86/include/asm/pgtable_types.h | 3 ++ arch/x86/mm/ioremap.c | 24 ++++++++++++ arch/x86/mm/pageattr.c | 73 +++++++++++++++++++++++++++++++++--- arch/x86/mm/pat.c | 69 +++++++++++++++++++++++++--------- include/asm-generic/io.h | 4 ++ include/asm-generic/iomap.h | 4 ++ include/asm-generic/pgtable.h | 4 ++ 10 files changed, 179 insertions(+), 28 deletions(-) -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@kvack.org. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: email@kvack.org