From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-qt0-x243.google.com (mail-qt0-x243.google.com [IPv6:2607:f8b0:400d:c0d::243]) (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 3x9CMd6VsLzDqmj for ; Sun, 16 Jul 2017 13:58:37 +1000 (AEST) Received: by mail-qt0-x243.google.com with SMTP id j25so998118qtf.0 for ; Sat, 15 Jul 2017 20:58:37 -0700 (PDT) Sender: Ram Pai 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, mhocko@kernel.org Subject: [RFC v6 14/62] powerpc: helper function to read, write AMR, IAMR, UAMOR registers Date: Sat, 15 Jul 2017 20:56:16 -0700 Message-Id: <1500177424-13695-15-git-send-email-linuxram@us.ibm.com> In-Reply-To: <1500177424-13695-1-git-send-email-linuxram@us.ibm.com> References: <1500177424-13695-1-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: , Implements helper functions to read and write the key related registers; AMR, IAMR, UAMOR. AMR register tracks the read,write permission of a key IAMR register tracks the execute permission of a key UAMOR register enables and disables a key Signed-off-by: Ram Pai --- arch/powerpc/include/asm/book3s/64/pgtable.h | 26 ++++++++++++++++++++++++++ 1 files changed, 26 insertions(+), 0 deletions(-) diff --git a/arch/powerpc/include/asm/book3s/64/pgtable.h b/arch/powerpc/include/asm/book3s/64/pgtable.h index 85bc987..d4da0e9 100644 --- a/arch/powerpc/include/asm/book3s/64/pgtable.h +++ b/arch/powerpc/include/asm/book3s/64/pgtable.h @@ -428,6 +428,32 @@ static inline void huge_ptep_set_wrprotect(struct mm_struct *mm, pte_update(mm, addr, ptep, 0, _PAGE_PRIVILEGED, 1); } +#include +static inline u64 read_amr(void) +{ + return mfspr(SPRN_AMR); +} +static inline void write_amr(u64 value) +{ + mtspr(SPRN_AMR, value); +} +static inline u64 read_iamr(void) +{ + return mfspr(SPRN_IAMR); +} +static inline void write_iamr(u64 value) +{ + mtspr(SPRN_IAMR, value); +} +static inline u64 read_uamor(void) +{ + return mfspr(SPRN_UAMOR); +} +static inline void write_uamor(u64 value) +{ + mtspr(SPRN_UAMOR, value); +} + #define __HAVE_ARCH_PTEP_GET_AND_CLEAR static inline pte_t ptep_get_and_clear(struct mm_struct *mm, unsigned long addr, pte_t *ptep) -- 1.7.1