From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mx0a-001b2d01.pphosted.com (mx0b-001b2d01.pphosted.com [148.163.158.5]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by lists.ozlabs.org (Postfix) with ESMTPS id 3vyk0T1ksxzDqGv for ; Wed, 5 Apr 2017 21:20:25 +1000 (AEST) Received: from pps.filterd (m0098421.ppops.net [127.0.0.1]) by mx0a-001b2d01.pphosted.com (8.16.0.20/8.16.0.20) with SMTP id v35BItXX118766 for ; Wed, 5 Apr 2017 07:20:20 -0400 Received: from e28smtp01.in.ibm.com (e28smtp01.in.ibm.com [125.16.236.1]) by mx0a-001b2d01.pphosted.com with ESMTP id 29mwmyx470-1 (version=TLSv1.2 cipher=AES256-SHA bits=256 verify=NOT) for ; Wed, 05 Apr 2017 07:20:20 -0400 Received: from localhost by e28smtp01.in.ibm.com with IBM ESMTP SMTP Gateway: Authorized Use Only! Violators will be prosecuted for from ; Wed, 5 Apr 2017 16:50:17 +0530 Received: from d28av03.in.ibm.com (d28av03.in.ibm.com [9.184.220.65]) by d28relay04.in.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id v35BKFhs6226160 for ; Wed, 5 Apr 2017 16:50:15 +0530 Received: from d28av03.in.ibm.com (localhost [127.0.0.1]) by d28av03.in.ibm.com (8.14.4/8.14.4/NCO v10.0 AVout) with ESMTP id v35BKDKT029042 for ; Wed, 5 Apr 2017 16:50:14 +0530 From: Anshuman Khandual To: linuxppc-dev@lists.ozlabs.org Cc: aneesh.kumar@linux.vnet.ibm.com, mpe@ellerman.id.au Subject: [PATCH V3] powerpc/hugetlb: Add ABI defines for supported HugeTLB page sizes Date: Wed, 5 Apr 2017 16:50:07 +0530 In-Reply-To: <87pogrtjns.fsf@concordia.ellerman.id.au> References: <87pogrtjns.fsf@concordia.ellerman.id.au> Message-Id: <20170405112007.17390-1-khandual@linux.vnet.ibm.com> List-Id: Linux on PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , This just adds user space exported ABI definitions for 2MB, 16MB, 1GB, 16GB non default huge page sizes to be used with mmap() system call. Signed-off-by: Anshuman Khandual --- These defined values will be used along with MAP_HUGETLB while calling mmap() system call if the desired HugeTLB page size is not the default one. Follows similar definitions present in x86. arch/x86/include/uapi/asm/mman.h:#define MAP_HUGE_2MB (21 << MAP_HUGE_SHIFT) arch/x86/include/uapi/asm/mman.h:#define MAP_HUGE_1GB (30 << MAP_HUGE_SHIFT) Changes in V3: - Added comment about how these defines will help create 'flags' argument for mmap() system call per Balbir Changes in V2: - Added definitions for 2MB and 1GB HugeTLB pages per Aneesh arch/powerpc/include/uapi/asm/mman.h | 10 ++++++++++ 1 file changed, 10 insertions(+) diff --git a/arch/powerpc/include/uapi/asm/mman.h b/arch/powerpc/include/uapi/asm/mman.h index 03c06ba..0c84e14 100644 --- a/arch/powerpc/include/uapi/asm/mman.h +++ b/arch/powerpc/include/uapi/asm/mman.h @@ -29,4 +29,14 @@ #define MAP_STACK 0x20000 /* give out an address that is best suited for process/thread stacks */ #define MAP_HUGETLB 0x40000 /* create a huge page mapping */ +/* + * These defines should be used for creating 'flags' argument + * (26:31 bits) for the mmap() system call should the caller + * decide to use non default HugeTLB page size. + */ +#define MAP_HUGE_2MB (21 << MAP_HUGE_SHIFT) /* 2MB HugeTLB Page */ +#define MAP_HUGE_16MB (24 << MAP_HUGE_SHIFT) /* 16MB HugeTLB Page */ +#define MAP_HUGE_1GB (30 << MAP_HUGE_SHIFT) /* 1GB HugeTLB Page */ +#define MAP_HUGE_16GB (34 << MAP_HUGE_SHIFT) /* 16GB HugeTLB Page */ + #endif /* _UAPI_ASM_POWERPC_MMAN_H */ -- 1.8.5.2