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 2F77F28029C for ; Wed, 15 Jul 2015 12:25:00 -0400 (EDT) Received: by obbop1 with SMTP id op1so29806244obb.2 for ; Wed, 15 Jul 2015 09:24:59 -0700 (PDT) Received: from g2t2353.austin.hp.com (g2t2353.austin.hp.com. [15.217.128.52]) by mx.google.com with ESMTPS id i3si4178653oif.60.2015.07.15.09.24.59 for (version=TLSv1.2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Wed, 15 Jul 2015 09:24:59 -0700 (PDT) From: Toshi Kani Subject: [PATCH v2 0/4] x86, mm: Handle large PAT bit in pud/pmd interfaces Date: Wed, 15 Jul 2015 10:23:51 -0600 Message-Id: <1436977435-31826-1-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 Cc: akpm@linux-foundation.org, bp@alien8.de, linux-mm@kvack.org, linux-kernel@vger.kernel.org, x86@kernel.org, jgross@suse.com, konrad.wilk@oracle.com, elliott@hp.com The PAT bit gets relocated to bit 12 when PUD and PMD mappings are used. This bit 12, however, is not covered by PTE_FLAGS_MASK, which is corrently used for masking pfn and flags for all cases. Patch 1/4-2/4 make changes necessary for patch 3/4 to use P?D_PAGE_MASK. Patch 3/4 fixes pud/pmd interfaces to handle the PAT bit when PUD and PMD mappings are used. Patch 3/4 fixes /sys/kernel/debug/kernel_page_tables to show the PAT bit properly. Note, the PAT bit is first enabled in 4.2-rc1 with WT mappings. --- v2: - Change p?n_pfn() to handle the PAT bit. (Juergen Gross) - Mask pfn and flags with P?D_PAGE_MASK. (Juergen Gross) - Change p?d_page_vaddr() and p?d_page() to handle the PAT bit. --- Toshi Kani (4): 1/4 x86/vdso32: Define PGTABLE_LEVELS to 32bit VDSO 2/4 x86, asm: Move PUD_PAGE macros to page_types.h 3/4 x86: Fix pud/pmd interfaces to handle large PAT bit 4/4 x86, mm: Fix page table dump to show PAT bit --- 4fa1ff9a08c...dd58e3d52618b00dd768de1753c35611906fcbee --stat arch/x86/entry/vdso/vdso32/vclock_gettime.c | 2 ++ arch/x86/include/asm/page_64_types.h | 3 --- arch/x86/include/asm/page_types.h | 3 +++ arch/x86/include/asm/pgtable.h | 14 +++++----- arch/x86/include/asm/pgtable_types.h | 40 ++++++++++++++++++++++++++--- arch/x86/mm/dump_pagetables.c | 39 +++++++++++++++------------- 6 files changed, 70 insertions(+), 31 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