From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-qk0-x241.google.com (mail-qk0-x241.google.com [IPv6:2607:f8b0:400d:c09::241]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by lists.ozlabs.org (Postfix) with ESMTPS id 3xpsrQ2YcVzDrcw for ; Sat, 9 Sep 2017 08:46:46 +1000 (AEST) Received: by mail-qk0-x241.google.com with SMTP id d70so2319242qkc.1 for ; Fri, 08 Sep 2017 15:46:46 -0700 (PDT) Sender: Ram Pai From: Ram Pai To: mpe@ellerman.id.au, linuxppc-dev@lists.ozlabs.org Cc: benh@kernel.crashing.org, paulus@samba.org, khandual@linux.vnet.ibm.com, aneesh.kumar@linux.vnet.ibm.com, bsingharora@gmail.com, hbabu@us.ibm.com, mhocko@kernel.org, bauerman@linux.vnet.ibm.com, ebiederm@xmission.com, linuxram@us.ibm.com Subject: [PATCH 02/25] powerpc: define an additional vma bit for protection keys. Date: Fri, 8 Sep 2017 15:44:50 -0700 Message-Id: <1504910713-7094-11-git-send-email-linuxram@us.ibm.com> In-Reply-To: <1504910713-7094-1-git-send-email-linuxram@us.ibm.com> References: <1504910713-7094-1-git-send-email-linuxram@us.ibm.com> List-Id: Linux on PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , powerpc needs an additional vma bit to support 32 keys. Till the additional vma bit lands in include/linux/mm.h we have to define it in powerpc specific header file. This is needed to get pkeys working on power. Signed-off-by: Ram Pai --- arch/powerpc/include/asm/pkeys.h | 18 ++++++++++++++++++ 1 files changed, 18 insertions(+), 0 deletions(-) diff --git a/arch/powerpc/include/asm/pkeys.h b/arch/powerpc/include/asm/pkeys.h index c02305a..44e01a2 100644 --- a/arch/powerpc/include/asm/pkeys.h +++ b/arch/powerpc/include/asm/pkeys.h @@ -3,6 +3,24 @@ extern bool pkey_inited; extern bool pkey_execute_disable_support; + +/* + * powerpc needs an additional vma bit to support 32 keys. + * Till the additional vma bit lands in include/linux/mm.h + * we have to carry the hunk below. This is needed to get + * pkeys working on power. -- Ram + */ +#ifndef VM_HIGH_ARCH_BIT_4 +#define VM_HIGH_ARCH_BIT_4 36 +#define VM_HIGH_ARCH_4 BIT(VM_HIGH_ARCH_BIT_4) +#define VM_PKEY_SHIFT VM_HIGH_ARCH_BIT_0 +#define VM_PKEY_BIT0 VM_HIGH_ARCH_0 +#define VM_PKEY_BIT1 VM_HIGH_ARCH_1 +#define VM_PKEY_BIT2 VM_HIGH_ARCH_2 +#define VM_PKEY_BIT3 VM_HIGH_ARCH_3 +#define VM_PKEY_BIT4 VM_HIGH_ARCH_4 +#endif + #define ARCH_VM_PKEY_FLAGS 0 static inline bool mm_pkey_is_allocated(struct mm_struct *mm, int pkey) -- 1.7.1