Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752836AbbGOQZA (ORCPT ); Wed, 15 Jul 2015 12:25:00 -0400 Received: from g2t2353.austin.hp.com ([15.217.128.52]:16431 "EHLO g2t2353.austin.hp.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751938AbbGOQY7 (ORCPT ); Wed, 15 Jul 2015 12:24:59 -0400 From: Toshi Kani 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 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> X-Mailer: git-send-email 2.4.3 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1684 Lines: 41 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 from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/