From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id D081DC433FE for ; Mon, 24 Jan 2022 12:58:10 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S239721AbiAXM6J (ORCPT ); Mon, 24 Jan 2022 07:58:09 -0500 Received: from foss.arm.com ([217.140.110.172]:33032 "EHLO foss.arm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S242794AbiAXM6G (ORCPT ); Mon, 24 Jan 2022 07:58:06 -0500 Received: from usa-sjc-imap-foss1.foss.arm.com (unknown [10.121.207.14]) by usa-sjc-mx-foss1.foss.arm.com (Postfix) with ESMTP id 73214101E; Mon, 24 Jan 2022 04:58:05 -0800 (PST) Received: from p8cg001049571a15.arm.com (unknown [10.163.43.190]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPA id 93EF23F774; Mon, 24 Jan 2022 04:58:01 -0800 (PST) From: Anshuman Khandual To: linux-mm@kvack.org Cc: linux-kernel@vger.kernel.org, hch@infradead.org, akpm@linux-foundation.org, Anshuman Khandual , Heiko Carstens , Vasily Gorbik , linux-s390@vger.kernel.org Subject: [RFC V1 14/31] s390/mm: Enable ARCH_HAS_VM_GET_PAGE_PROT Date: Mon, 24 Jan 2022 18:26:51 +0530 Message-Id: <1643029028-12710-15-git-send-email-anshuman.khandual@arm.com> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1643029028-12710-1-git-send-email-anshuman.khandual@arm.com> References: <1643029028-12710-1-git-send-email-anshuman.khandual@arm.com> Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org This defines and exports a platform specific custom vm_get_page_prot() via subscribing ARCH_HAS_VM_GET_PAGE_PROT. Subsequently all __SXXX and __PXXX macros can be dropped which are no longer needed. Cc: Heiko Carstens Cc: Vasily Gorbik Cc: linux-s390@vger.kernel.org Cc: linux-kernel@vger.kernel.org Signed-off-by: Anshuman Khandual --- arch/s390/Kconfig | 1 + arch/s390/include/asm/pgtable.h | 17 -------------- arch/s390/mm/mmap.c | 41 +++++++++++++++++++++++++++++++++ 3 files changed, 42 insertions(+), 17 deletions(-) diff --git a/arch/s390/Kconfig b/arch/s390/Kconfig index 9750f92380f5..83d1e0e3c762 100644 --- a/arch/s390/Kconfig +++ b/arch/s390/Kconfig @@ -78,6 +78,7 @@ config S390 select ARCH_HAS_SYSCALL_WRAPPER select ARCH_HAS_UBSAN_SANITIZE_ALL select ARCH_HAS_VDSO_DATA + select ARCH_HAS_VM_GET_PAGE_PROT select ARCH_HAVE_NMI_SAFE_CMPXCHG select ARCH_INLINE_READ_LOCK select ARCH_INLINE_READ_LOCK_BH diff --git a/arch/s390/include/asm/pgtable.h b/arch/s390/include/asm/pgtable.h index 008a6c856fa4..3893ef64b439 100644 --- a/arch/s390/include/asm/pgtable.h +++ b/arch/s390/include/asm/pgtable.h @@ -422,23 +422,6 @@ static inline int is_module_addr(void *addr) * implies read permission. */ /*xwr*/ -#define __P000 PAGE_NONE -#define __P001 PAGE_RO -#define __P010 PAGE_RO -#define __P011 PAGE_RO -#define __P100 PAGE_RX -#define __P101 PAGE_RX -#define __P110 PAGE_RX -#define __P111 PAGE_RX - -#define __S000 PAGE_NONE -#define __S001 PAGE_RO -#define __S010 PAGE_RW -#define __S011 PAGE_RW -#define __S100 PAGE_RX -#define __S101 PAGE_RX -#define __S110 PAGE_RWX -#define __S111 PAGE_RWX /* * Segment entry (large page) protection definitions. diff --git a/arch/s390/mm/mmap.c b/arch/s390/mm/mmap.c index e54f928503c5..5b15469eef7a 100644 --- a/arch/s390/mm/mmap.c +++ b/arch/s390/mm/mmap.c @@ -188,3 +188,44 @@ void arch_pick_mmap_layout(struct mm_struct *mm, struct rlimit *rlim_stack) mm->get_unmapped_area = arch_get_unmapped_area_topdown; } } + +pgprot_t vm_get_page_prot(unsigned long vm_flags) +{ + switch (vm_flags & (VM_READ | VM_WRITE | VM_EXEC | VM_SHARED)) { + case VM_NONE: + return PAGE_NONE; + case VM_READ: + return PAGE_RO; + case VM_WRITE: + return PAGE_RO; + case VM_READ | VM_WRITE: + return PAGE_RO; + case VM_EXEC: + return PAGE_RX; + case VM_EXEC | VM_READ: + return PAGE_RX; + case VM_EXEC | VM_WRITE: + return PAGE_RX; + case VM_EXEC | VM_READ | VM_WRITE: + return PAGE_RX; + case VM_SHARED: + return PAGE_NONE; + case VM_SHARED | VM_READ: + return PAGE_RO; + case VM_SHARED | VM_WRITE: + return PAGE_RW; + case VM_SHARED | VM_READ | VM_WRITE: + return PAGE_RW; + case VM_SHARED | VM_EXEC: + return PAGE_RX; + case VM_SHARED | VM_EXEC | VM_READ: + return PAGE_RX; + case VM_SHARED | VM_EXEC | VM_WRITE: + return PAGE_RWX; + case VM_SHARED | VM_EXEC | VM_READ | VM_WRITE: + return PAGE_RWX; + default: + BUILD_BUG(); + } +} +EXPORT_SYMBOL(vm_get_page_prot); -- 2.25.1