{"id":814447,"url":"http://patchwork.ozlabs.org/api/patches/814447/?format=json","web_url":"http://patchwork.ozlabs.org/project/linuxppc-dev/patch/1505524870-4783-3-git-send-email-linuxram@us.ibm.com/","project":{"id":2,"url":"http://patchwork.ozlabs.org/api/projects/2/?format=json","name":"Linux PPC development","link_name":"linuxppc-dev","list_id":"linuxppc-dev.lists.ozlabs.org","list_email":"linuxppc-dev@lists.ozlabs.org","web_url":"https://github.com/linuxppc/wiki/wiki","scm_url":"https://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux.git","webscm_url":"https://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux.git/","list_archive_url":"https://lore.kernel.org/linuxppc-dev/","list_archive_url_format":"https://lore.kernel.org/linuxppc-dev/{}/","commit_url_format":"https://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux.git/commit/?id={}"},"msgid":"<1505524870-4783-3-git-send-email-linuxram@us.ibm.com>","list_archive_url":"https://lore.kernel.org/linuxppc-dev/1505524870-4783-3-git-send-email-linuxram@us.ibm.com/","date":"2017-09-16T01:21:06","name":"[2/6] mm, x86 : introduce arch_pkeys_enabled()","commit_ref":null,"pull_url":null,"state":"changes-requested","archived":false,"hash":"c4226e149fcbc88388f7435ef6d222b9b94bce88","submitter":{"id":2667,"url":"http://patchwork.ozlabs.org/api/people/2667/?format=json","name":"Ram Pai","email":"linuxram@us.ibm.com"},"delegate":null,"mbox":"http://patchwork.ozlabs.org/project/linuxppc-dev/patch/1505524870-4783-3-git-send-email-linuxram@us.ibm.com/mbox/","series":[{"id":3406,"url":"http://patchwork.ozlabs.org/api/series/3406/?format=json","web_url":"http://patchwork.ozlabs.org/project/linuxppc-dev/list/?series=3406","date":"2017-09-16T01:21:04","name":"mm, x86, powerpc: Memory Protection Keys enhancement","version":1,"mbox":"http://patchwork.ozlabs.org/series/3406/mbox/"}],"comments":"http://patchwork.ozlabs.org/api/patches/814447/comments/","check":"pending","checks":"http://patchwork.ozlabs.org/api/patches/814447/checks/","tags":{},"related":[],"headers":{"Return-Path":"","X-Original-To":["patchwork-incoming@ozlabs.org","linuxppc-dev@lists.ozlabs.org"],"Delivered-To":["patchwork-incoming@ozlabs.org","linuxppc-dev@lists.ozlabs.org"],"Received":["from lists.ozlabs.org (lists.ozlabs.org [103.22.144.68])\n\t(using TLSv1.2 with cipher ADH-AES256-GCM-SHA384 (256/256 bits))\n\t(No client certificate requested)\n\tby ozlabs.org (Postfix) with ESMTPS id 3xvF4H2CVTz9t16\n\tfor ;\n\tSat, 16 Sep 2017 11:27:11 +1000 (AEST)","from lists.ozlabs.org (lists.ozlabs.org [IPv6:2401:3900:2:1::3])\n\tby lists.ozlabs.org (Postfix) with ESMTP id 3xvF4H0tR7zDqYV\n\tfor ;\n\tSat, 16 Sep 2017 11:27:11 +1000 (AEST)","from mail-qk0-x244.google.com (mail-qk0-x244.google.com\n\t[IPv6:2607:f8b0:400d:c09::244])\n\t(using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128\n\tbits)) (No client certificate requested)\n\tby lists.ozlabs.org (Postfix) with ESMTPS id 3xvDxt60k1zDrbr\n\tfor ;\n\tSat, 16 Sep 2017 11:21:38 +1000 (AEST)","by mail-qk0-x244.google.com with SMTP id g128so2445544qke.0\n\tfor ;\n\tFri, 15 Sep 2017 18:21:38 -0700 (PDT)","from localhost.localdomain (50-39-103-96.bvtn.or.frontiernet.net.\n\t[50.39.103.96]) by smtp.gmail.com with ESMTPSA id\n\tv11sm1493189qkl.45.2017.09.15.18.21.33\n\t(version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128);\n\tFri, 15 Sep 2017 18:21:35 -0700 (PDT)"],"Authentication-Results":["ozlabs.org;\n\tdkim=fail reason=\"signature verification failed\" (2048-bit key;\n\tunprotected) header.d=gmail.com header.i=@gmail.com\n\theader.b=\"jZ/OOpP7\"; 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Hence\nintroducing arch_pkeys_enabled().\n\nThis patch also provides x86 implementation for\narch_pkeys_enabled().\n\nSigned-off-by: Ram Pai \n---\n arch/x86/include/asm/pkeys.h | 1 +\n arch/x86/kernel/fpu/xstate.c | 5 +++++\n include/linux/pkeys.h | 5 +++++\n 3 files changed, 11 insertions(+), 0 deletions(-)","diff":"diff --git a/arch/x86/include/asm/pkeys.h b/arch/x86/include/asm/pkeys.h\nindex b3b09b9..fa82799 100644\n--- a/arch/x86/include/asm/pkeys.h\n+++ b/arch/x86/include/asm/pkeys.h\n@@ -5,6 +5,7 @@\n \n extern int arch_set_user_pkey_access(struct task_struct *tsk, int pkey,\n \t\tunsigned long init_val);\n+extern bool arch_pkeys_enabled(void);\n \n /*\n * Try to dedicate one of the protection keys to be used as an\ndiff --git a/arch/x86/kernel/fpu/xstate.c b/arch/x86/kernel/fpu/xstate.c\nindex c24ac1e..df594b8 100644\n--- a/arch/x86/kernel/fpu/xstate.c\n+++ b/arch/x86/kernel/fpu/xstate.c\n@@ -918,6 +918,11 @@ int arch_set_user_pkey_access(struct task_struct *tsk, int pkey,\n \n \treturn 0;\n }\n+\n+bool arch_pkeys_enabled(void)\n+{\n+\treturn boot_cpu_has(X86_FEATURE_OSPKE);\n+}\n #endif /* ! CONFIG_ARCH_HAS_PKEYS */\n \n /*\ndiff --git a/include/linux/pkeys.h b/include/linux/pkeys.h\nindex a1bacf1..d120810 100644\n--- a/include/linux/pkeys.h\n+++ b/include/linux/pkeys.h\n@@ -34,6 +34,11 @@ static inline int arch_set_user_pkey_access(struct task_struct *tsk, int pkey,\n \treturn 0;\n }\n \n+static inline bool arch_pkeys_enabled(void)\n+{\n+\treturn false;\n+}\n+\n static inline void copy_init_pkru_to_fpregs(void)\n {\n }\n","prefixes":["2/6"]}