From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754743AbaIDSqU (ORCPT ); Thu, 4 Sep 2014 14:46:20 -0400 Received: from g9t1613g.houston.hp.com ([15.240.0.71]:46059 "EHLO g9t1613g.houston.hp.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751661AbaIDSqT (ORCPT ); Thu, 4 Sep 2014 14:46:19 -0400 From: Toshi Kani To: hpa@zytor.com, tglx@linutronix.de, mingo@redhat.com, akpm@linuxfoundation.org, arnd@arndb.de Cc: linux-mm@kvack.org, linux-kernel@vger.kernel.org, jgross@suse.com, stefan.bader@canonical.com, luto@amacapital.net, konrad.wilk@oracle.com Subject: [PATCH 0/5] Support Write-Through mapping on x86 Date: Thu, 4 Sep 2014 12:35:34 -0600 Message-Id: <1409855739-8985-1-git-send-email-toshi.kani@hp.com> X-Mailer: git-send-email 1.8.3.1 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org 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/2014/8/26/61 All new/modified interfaces have been tested. --- Toshi Kani (5): 1/5 x86, mm, pat: Set WT to PA4 slot of PAT MSR 2/5 x86, mm, pat: Change reserve_memtype() to handle WT 3/5 x86, mm, asm-gen: Add ioremap_wt() for WT 4/5 x86, mm: Add set_memory_wt() for WT 5/5 x86, mm, pat: Add pgprot_writethrough() for WT --- 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 | 73 +++++++++++++++++++++++++++--------- include/asm-generic/io.h | 4 ++ include/asm-generic/iomap.h | 4 ++ include/asm-generic/pgtable.h | 4 ++ 9 files changed, 172 insertions(+), 25 deletions(-)