Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752919AbdGEVXQ (ORCPT ); Wed, 5 Jul 2017 17:23:16 -0400 Received: from mail-qk0-f194.google.com ([209.85.220.194]:36466 "EHLO mail-qk0-f194.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752819AbdGEVXJ (ORCPT ); Wed, 5 Jul 2017 17:23:09 -0400 From: Ram Pai To: linuxppc-dev@lists.ozlabs.org, linux-kernel@vger.kernel.org, linux-arch@vger.kernel.org, linux-mm@kvack.org, x86@kernel.org, linux-doc@vger.kernel.org, linux-kselftest@vger.kernel.org Cc: benh@kernel.crashing.org, paulus@samba.org, mpe@ellerman.id.au, khandual@linux.vnet.ibm.com, aneesh.kumar@linux.vnet.ibm.com, bsingharora@gmail.com, dave.hansen@intel.com, hbabu@us.ibm.com, linuxram@us.ibm.com, arnd@arndb.de, akpm@linux-foundation.org, corbet@lwn.net, mingo@redhat.com Subject: [RFC v5 12/38] mm: ability to disable execute permission on a key at creation Date: Wed, 5 Jul 2017 14:21:49 -0700 Message-Id: <1499289735-14220-13-git-send-email-linuxram@us.ibm.com> X-Mailer: git-send-email 1.7.1 In-Reply-To: <1499289735-14220-1-git-send-email-linuxram@us.ibm.com> References: <1499289735-14220-1-git-send-email-linuxram@us.ibm.com> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1073 Lines: 30 Currently sys_pkey_create() provides the ability to disable read and write permission on the key, at creation. powerpc has the hardware support to disable execute on a pkey as well.This patch enhances the interface to let disable execute at key creation time. x86 does not allow this. Hence the next patch will add ability in x86 to return error if PKEY_DISABLE_EXECUTE is specified. Signed-off-by: Ram Pai --- include/uapi/asm-generic/mman-common.h | 4 +++- 1 files changed, 3 insertions(+), 1 deletions(-) diff --git a/include/uapi/asm-generic/mman-common.h b/include/uapi/asm-generic/mman-common.h index 8c27db0..bf4fa07 100644 --- a/include/uapi/asm-generic/mman-common.h +++ b/include/uapi/asm-generic/mman-common.h @@ -74,7 +74,9 @@ #define PKEY_DISABLE_ACCESS 0x1 #define PKEY_DISABLE_WRITE 0x2 +#define PKEY_DISABLE_EXECUTE 0x4 #define PKEY_ACCESS_MASK (PKEY_DISABLE_ACCESS |\ - PKEY_DISABLE_WRITE) + PKEY_DISABLE_WRITE |\ + PKEY_DISABLE_EXECUTE) #endif /* __ASM_GENERIC_MMAN_COMMON_H */ -- 1.7.1