From patchwork Thu Jun 30 05:16:20 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Anshuman Khandual X-Patchwork-Id: 12901146 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 kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by smtp.lore.kernel.org (Postfix) with ESMTP id 4C7B6C433EF for ; Thu, 30 Jun 2022 05:19:07 +0000 (UTC) Received: by kanga.kvack.org (Postfix) id E0ED66B009A; Thu, 30 Jun 2022 01:19:06 -0400 (EDT) Received: by kanga.kvack.org (Postfix, from userid 40) id D97EF8E000B; Thu, 30 Jun 2022 01:19:06 -0400 (EDT) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id C38DC8E000A; Thu, 30 Jun 2022 01:19:06 -0400 (EDT) X-Delivered-To: linux-mm@kvack.org Received: from relay.hostedemail.com (smtprelay0011.hostedemail.com [216.40.44.11]) by kanga.kvack.org (Postfix) with ESMTP id B01F96B009A for ; Thu, 30 Jun 2022 01:19:06 -0400 (EDT) Received: from smtpin24.hostedemail.com (a10.router.float.18 [10.200.18.1]) by unirelay01.hostedemail.com (Postfix) with ESMTP id 2EE8F6044F for ; Thu, 30 Jun 2022 05:19:06 +0000 (UTC) X-FDA: 79633748292.24.035DBEA Received: from foss.arm.com (foss.arm.com [217.140.110.172]) by imf26.hostedemail.com (Postfix) with ESMTP id B39FE140024 for ; Thu, 30 Jun 2022 05:19:05 +0000 (UTC) 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 68C64176B; Wed, 29 Jun 2022 22:19:05 -0700 (PDT) Received: from a077893.blr.arm.com (unknown [10.162.41.8]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPA id CF15A3F66F; Wed, 29 Jun 2022 22:18:56 -0700 (PDT) From: Anshuman Khandual To: linux-mm@kvack.org, akpm@linux-foundation.org Cc: hch@infradead.org, christophe.leroy@csgroup.eu, Anshuman Khandual , linuxppc-dev@lists.ozlabs.org, sparclinux@vger.kernel.org, x86@kernel.org, openrisc@lists.librecores.org, linux-xtensa@linux-xtensa.org, linux-csky@vger.kernel.org, linux-hexagon@vger.kernel.org, linux-parisc@vger.kernel.org, linux-alpha@vger.kernel.org, linux-riscv@lists.infradead.org, linux-s390@vger.kernel.org, linux-ia64@vger.kernel.org, linux-mips@vger.kernel.org, linux-m68k@lists.linux-m68k.org, linux-snps-arc@lists.infradead.org, linux-arm-kernel@lists.infradead.org, linux-um@lists.infradead.org, linux-sh@vger.kernel.org, linux-kernel@vger.kernel.org, Paul Walmsley , Palmer Dabbelt Subject: [PATCH V6 16/26] riscv/mm: Enable ARCH_HAS_VM_GET_PAGE_PROT Date: Thu, 30 Jun 2022 10:46:20 +0530 Message-Id: <20220630051630.1718927-17-anshuman.khandual@arm.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20220630051630.1718927-1-anshuman.khandual@arm.com> References: <20220630051630.1718927-1-anshuman.khandual@arm.com> MIME-Version: 1.0 ARC-Authentication-Results: i=1; imf26.hostedemail.com; dkim=none; dmarc=pass (policy=none) header.from=arm.com; spf=pass (imf26.hostedemail.com: domain of anshuman.khandual@arm.com designates 217.140.110.172 as permitted sender) smtp.mailfrom=anshuman.khandual@arm.com ARC-Seal: i=1; s=arc-20220608; d=hostedemail.com; t=1656566345; a=rsa-sha256; cv=none; b=BeAEfRFLEwomVNFVshY8lhLptYIAMesllwhcLOz+inVLYgIxHsrsSQM/MsZkwDXM5vQFxV WuBTu3k0NWVvpZYDL6v7MAk2FFaOKJlXXYPaLzAR7AlA9zgOXcazPWJ2VXyTyF9A6PZBVx 9K49fq8ONqOMsKGVWvOFGbMBZbifopw= ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=hostedemail.com; s=arc-20220608; t=1656566345; h=from:from:sender:reply-to:subject:subject:date:date: message-id:message-id:to:to:cc:cc:mime-version:mime-version: content-type:content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=m1MkA66UkOH+2bNfLfqBge9YpcaoDgd4FQy0mf+euo4=; b=KubAG4Srdvu68c47PhRpHxkhqPvJSnCG5+bgWFe57rsbrDBDhp1GLxIkXeadThbzcFa/j3 KpA9Wvg35lPiWgb9QvZ7YTk5zemzn+Qrxy34/30RCxe8IE6sxg6r6LboBmXfnsdzR18E0v 9M6SK0YQcnlxN/z8sTHAdDc73wo/brs= X-Rspam-User: Authentication-Results: imf26.hostedemail.com; dkim=none; dmarc=pass (policy=none) header.from=arm.com; spf=pass (imf26.hostedemail.com: domain of anshuman.khandual@arm.com designates 217.140.110.172 as permitted sender) smtp.mailfrom=anshuman.khandual@arm.com X-Rspamd-Server: rspam08 X-Rspamd-Queue-Id: B39FE140024 X-Stat-Signature: x9upng4jyehqtf97khtqrzrrosxiayda X-HE-Tag: 1656566345-118629 X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: This enables ARCH_HAS_VM_GET_PAGE_PROT on the platform and exports standard vm_get_page_prot() implementation via DECLARE_VM_GET_PAGE_PROT, which looks up a private and static protection_map[] array. Subsequently all __SXXX and __PXXX macros can be dropped which are no longer needed. Cc: Paul Walmsley Cc: Palmer Dabbelt Cc: linux-riscv@lists.infradead.org Cc: linux-kernel@vger.kernel.org Signed-off-by: Anshuman Khandual --- arch/riscv/Kconfig | 1 + arch/riscv/include/asm/pgtable.h | 20 -------------------- arch/riscv/mm/init.c | 20 ++++++++++++++++++++ 3 files changed, 21 insertions(+), 20 deletions(-) diff --git a/arch/riscv/Kconfig b/arch/riscv/Kconfig index 32ffef9f6e5b..583389d4e43a 100644 --- a/arch/riscv/Kconfig +++ b/arch/riscv/Kconfig @@ -32,6 +32,7 @@ config RISCV select ARCH_HAS_STRICT_MODULE_RWX if MMU && !XIP_KERNEL select ARCH_HAS_TICK_BROADCAST if GENERIC_CLOCKEVENTS_BROADCAST select ARCH_HAS_UBSAN_SANITIZE_ALL + select ARCH_HAS_VM_GET_PAGE_PROT select ARCH_OPTIONAL_KERNEL_RWX if ARCH_HAS_STRICT_KERNEL_RWX select ARCH_OPTIONAL_KERNEL_RWX_DEFAULT select ARCH_STACKWALK diff --git a/arch/riscv/include/asm/pgtable.h b/arch/riscv/include/asm/pgtable.h index 1d1be9d9419c..23e643db6575 100644 --- a/arch/riscv/include/asm/pgtable.h +++ b/arch/riscv/include/asm/pgtable.h @@ -186,26 +186,6 @@ extern struct pt_alloc_ops pt_ops __initdata; extern pgd_t swapper_pg_dir[]; -/* MAP_PRIVATE permissions: xwr (copy-on-write) */ -#define __P000 PAGE_NONE -#define __P001 PAGE_READ -#define __P010 PAGE_COPY -#define __P011 PAGE_COPY -#define __P100 PAGE_EXEC -#define __P101 PAGE_READ_EXEC -#define __P110 PAGE_COPY_EXEC -#define __P111 PAGE_COPY_READ_EXEC - -/* MAP_SHARED permissions: xwr */ -#define __S000 PAGE_NONE -#define __S001 PAGE_READ -#define __S010 PAGE_SHARED -#define __S011 PAGE_SHARED -#define __S100 PAGE_EXEC -#define __S101 PAGE_READ_EXEC -#define __S110 PAGE_SHARED_EXEC -#define __S111 PAGE_SHARED_EXEC - #ifdef CONFIG_TRANSPARENT_HUGEPAGE static inline int pmd_present(pmd_t pmd) { diff --git a/arch/riscv/mm/init.c b/arch/riscv/mm/init.c index d466ec670e1f..a88b7dc31a68 100644 --- a/arch/riscv/mm/init.c +++ b/arch/riscv/mm/init.c @@ -288,6 +288,26 @@ static pmd_t __maybe_unused early_dtb_pmd[PTRS_PER_PMD] __initdata __aligned(PAG #define early_pg_dir ((pgd_t *)XIP_FIXUP(early_pg_dir)) #endif /* CONFIG_XIP_KERNEL */ +static const pgprot_t protection_map[16] = { + [VM_NONE] = PAGE_NONE, + [VM_READ] = PAGE_READ, + [VM_WRITE] = PAGE_COPY, + [VM_WRITE | VM_READ] = PAGE_COPY, + [VM_EXEC] = PAGE_EXEC, + [VM_EXEC | VM_READ] = PAGE_READ_EXEC, + [VM_EXEC | VM_WRITE] = PAGE_COPY_EXEC, + [VM_EXEC | VM_WRITE | VM_READ] = PAGE_COPY_READ_EXEC, + [VM_SHARED] = PAGE_NONE, + [VM_SHARED | VM_READ] = PAGE_READ, + [VM_SHARED | VM_WRITE] = PAGE_SHARED, + [VM_SHARED | VM_WRITE | VM_READ] = PAGE_SHARED, + [VM_SHARED | VM_EXEC] = PAGE_EXEC, + [VM_SHARED | VM_EXEC | VM_READ] = PAGE_READ_EXEC, + [VM_SHARED | VM_EXEC | VM_WRITE] = PAGE_SHARED_EXEC, + [VM_SHARED | VM_EXEC | VM_WRITE | VM_READ] = PAGE_SHARED_EXEC +}; +DECLARE_VM_GET_PAGE_PROT + void __set_fixmap(enum fixed_addresses idx, phys_addr_t phys, pgprot_t prot) { unsigned long addr = __fix_to_virt(idx);