From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-ua0-f197.google.com (mail-ua0-f197.google.com [209.85.217.197]) by kanga.kvack.org (Postfix) with ESMTP id 2FCB56B0260 for ; Fri, 16 Dec 2016 13:36:02 -0500 (EST) Received: by mail-ua0-f197.google.com with SMTP id 51so45224957uai.3 for ; Fri, 16 Dec 2016 10:36:02 -0800 (PST) Received: from aserp1040.oracle.com (aserp1040.oracle.com. [141.146.126.69]) by mx.google.com with ESMTPS id w26si458820uaa.119.2016.12.16.10.36.01 for (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Fri, 16 Dec 2016 10:36:01 -0800 (PST) From: Mike Kravetz Subject: [RFC PATCH 05/14] sparc64: Add PAGE_SHR_CTX flag Date: Fri, 16 Dec 2016 10:35:28 -0800 Message-Id: <1481913337-9331-6-git-send-email-mike.kravetz@oracle.com> In-Reply-To: <1481913337-9331-1-git-send-email-mike.kravetz@oracle.com> References: <1481913337-9331-1-git-send-email-mike.kravetz@oracle.com> Sender: owner-linux-mm@kvack.org List-ID: To: sparclinux@vger.kernel.org, linux-mm@kvack.org, linux-kernel@vger.kernel.org Cc: "David S . Miller" , Bob Picco , Nitin Gupta , Vijay Kumar , Julian Calaby , Adam Buchbinder , "Kirill A . Shutemov" , Michal Hocko , Andrew Morton , Mike Kravetz This new page flag is used to identify pages which are associated with a shared context ID. It is needed at page fault time when we only have access to the PTE and need to determine whether the associated TSB entry should be associated with the regular ot shared context TSB. A new helper routine is_sharedctx_pte() is also added. Signed-off-by: Mike Kravetz --- arch/sparc/include/asm/pgtable_64.h | 13 +++++++++++++ 1 file changed, 13 insertions(+) diff --git a/arch/sparc/include/asm/pgtable_64.h b/arch/sparc/include/asm/pgtable_64.h index 1fb317f..f2fd088 100644 --- a/arch/sparc/include/asm/pgtable_64.h +++ b/arch/sparc/include/asm/pgtable_64.h @@ -166,6 +166,7 @@ bool kern_addr_valid(unsigned long addr); #define _PAGE_EXEC_4V _AC(0x0000000000000080,UL) /* Executable Page */ #define _PAGE_W_4V _AC(0x0000000000000040,UL) /* Writable */ #define _PAGE_SOFT_4V _AC(0x0000000000000030,UL) /* Software bits */ +#define _PAGE_SHR_CTX_4V _AC(0x0000000000000020,UL) /* Shared Context */ #define _PAGE_PRESENT_4V _AC(0x0000000000000010,UL) /* Present */ #define _PAGE_RESV_4V _AC(0x0000000000000008,UL) /* Reserved */ #define _PAGE_SZ16GB_4V _AC(0x0000000000000007,UL) /* 16GB Page */ @@ -426,6 +427,18 @@ static inline bool is_hugetlb_pte(pte_t pte) } #endif +#if defined(CONFIG_SHARED_MMU_CTX) +static inline bool is_sharedctx_pte(pte_t pte) +{ + return !!(pte_val(pte) & _PAGE_SHR_CTX_4V); +} +#else +static inline bool is_sharedctx_pte(pte_t pte) +{ + return false; +} +#endif + static inline pte_t pte_mkdirty(pte_t pte) { unsigned long val = pte_val(pte), tmp; -- 2.7.4 -- 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