linux-kernel - [PATCH 0/5] Support Write-Through mapping on x86

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Date:	Thu,  4 Sep 2014 12:35:34 -0600
From:	Toshi Kani <toshi.kani@...com>
To:	hpa@...or.com, tglx@...utronix.de, mingo@...hat.com,
	akpm@...uxfoundation.org, arnd@...db.de
Cc:	linux-mm@...ck.org, linux-kernel@...r.kernel.org, jgross@...e.com,
	stefan.bader@...onical.com, luto@...capital.net,
	konrad.wilk@...cle.com
Subject: [PATCH 0/5] Support Write-Through mapping on x86

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(-)
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