From patchwork Mon Feb 28 10:47:49 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Anshuman Khandual X-Patchwork-Id: 12763026 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 bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 8D4B7C433F5 for ; Mon, 28 Feb 2022 11:15:43 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender: Content-Transfer-Encoding:Content-Type:MIME-Version:List-Subscribe:List-Help: List-Post:List-Archive:List-Unsubscribe:List-Id:References:In-Reply-To: Message-Id:Date:Subject:Cc:To:From:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=o6I/V6fOGEyaOLR20rgbsGDDAAXq0JF1t4UD+5Kmays=; b=fD6DjzXqp6HK4U /BaPvAaQVXGXZXWZHHNUWMwleAdgTiEO3AyqPcXFnQB7NJHsB/My/+WKIK1wL5xcJxjooZ6BMHk6d AkMa7dK8EMkIUf2t9RtWKn6kOs5twviu6Gk29PrcxIOKxWognrfn7kJnGOku/IJgP4M5WySEEOnng YUAh7ckU3+0v5BJIdfjqqrW+CizEiP6wzT0UkxtOvn1eVAceFBb8Dsydu9pBOigjHpYjkKViOx52q exWaqWJOeKyH+WmkLwVRqgu/k5THK4IuMT7Efhx7cIohh09sBohhC90aB4h+ndyUS3b9zgg0kJlrV /n55+t0FAtzshEDfESYA==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.94.2 #2 (Red Hat Linux)) id 1nOe08-00Bm1o-HX; Mon, 28 Feb 2022 11:15:36 +0000 Received: from foss.arm.com ([217.140.110.172]) by bombadil.infradead.org with esmtp (Exim 4.94.2 #2 (Red Hat Linux)) id 1nOddj-00BZTi-A7; Mon, 28 Feb 2022 10:52:30 +0000 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 8AD69106F; Mon, 28 Feb 2022 02:52:26 -0800 (PST) Received: from p8cg001049571a15.arm.com (unknown [10.163.47.185]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPA id A4B533F73D; Mon, 28 Feb 2022 02:52:18 -0800 (PST) From: Anshuman Khandual To: linux-mm@kvack.org, akpm@linux-foundation.org Cc: linux-kernel@vger.kernel.org, geert@linux-m68k.org, Anshuman Khandual , Christoph Hellwig , linuxppc-dev@lists.ozlabs.org, linux-arm-kernel@lists.infradead.org, sparclinux@vger.kernel.org, linux-mips@vger.kernel.org, linux-m68k@lists.linux-m68k.org, linux-s390@vger.kernel.org, linux-riscv@lists.infradead.org, linux-alpha@vger.kernel.org, linux-sh@vger.kernel.org, linux-snps-arc@lists.infradead.org, linux-csky@vger.kernel.org, linux-xtensa@linux-xtensa.org, linux-parisc@vger.kernel.org, openrisc@lists.librecores.org, linux-um@lists.infradead.org, linux-hexagon@vger.kernel.org, linux-ia64@vger.kernel.org, linux-arch@vger.kernel.org, Brian Cain Subject: [PATCH V3 26/30] hexagon/mm: Enable ARCH_HAS_VM_GET_PAGE_PROT Date: Mon, 28 Feb 2022 16:17:49 +0530 Message-Id: <1646045273-9343-27-git-send-email-anshuman.khandual@arm.com> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1646045273-9343-1-git-send-email-anshuman.khandual@arm.com> References: <1646045273-9343-1-git-send-email-anshuman.khandual@arm.com> X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20220228_025227_541400_42DEAAC9 X-CRM114-Status: GOOD ( 10.68 ) X-BeenThere: linux-riscv@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , MIME-Version: 1.0 Sender: "linux-riscv" Errors-To: linux-riscv-bounces+linux-riscv=archiver.kernel.org@lists.infradead.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: Brian Cain Cc: linux-hexagon@vger.kernel.org Cc: linux-kernel@vger.kernel.org Signed-off-by: Anshuman Khandual --- arch/hexagon/Kconfig | 1 + arch/hexagon/include/asm/pgtable.h | 24 ----------- arch/hexagon/mm/init.c | 67 ++++++++++++++++++++++++++++++ 3 files changed, 68 insertions(+), 24 deletions(-) diff --git a/arch/hexagon/Kconfig b/arch/hexagon/Kconfig index 15dd8f38b698..cdc5df32a1e3 100644 --- a/arch/hexagon/Kconfig +++ b/arch/hexagon/Kconfig @@ -6,6 +6,7 @@ config HEXAGON def_bool y select ARCH_32BIT_OFF_T select ARCH_HAS_SYNC_DMA_FOR_DEVICE + select ARCH_HAS_VM_GET_PAGE_PROT select ARCH_NO_PREEMPT select DMA_GLOBAL_POOL # Other pending projects/to-do items. diff --git a/arch/hexagon/include/asm/pgtable.h b/arch/hexagon/include/asm/pgtable.h index 18cd6ea9ab23..5eceddfe013d 100644 --- a/arch/hexagon/include/asm/pgtable.h +++ b/arch/hexagon/include/asm/pgtable.h @@ -127,31 +127,7 @@ extern unsigned long _dflt_cache_att; #define CACHEDEF (CACHE_DEFAULT << 6) /* Private (copy-on-write) page protections. */ -#define __P000 __pgprot(_PAGE_PRESENT | _PAGE_USER | CACHEDEF) -#define __P001 __pgprot(_PAGE_PRESENT | _PAGE_USER | _PAGE_READ | CACHEDEF) -#define __P010 __P000 /* Write-only copy-on-write */ -#define __P011 __P001 /* Read/Write copy-on-write */ -#define __P100 __pgprot(_PAGE_PRESENT | _PAGE_USER | \ - _PAGE_EXECUTE | CACHEDEF) -#define __P101 __pgprot(_PAGE_PRESENT | _PAGE_USER | _PAGE_EXECUTE | \ - _PAGE_READ | CACHEDEF) -#define __P110 __P100 /* Write/execute copy-on-write */ -#define __P111 __P101 /* Read/Write/Execute, copy-on-write */ - /* Shared page protections. */ -#define __S000 __P000 -#define __S001 __P001 -#define __S010 __pgprot(_PAGE_PRESENT | _PAGE_USER | \ - _PAGE_WRITE | CACHEDEF) -#define __S011 __pgprot(_PAGE_PRESENT | _PAGE_USER | _PAGE_READ | \ - _PAGE_WRITE | CACHEDEF) -#define __S100 __pgprot(_PAGE_PRESENT | _PAGE_USER | \ - _PAGE_EXECUTE | CACHEDEF) -#define __S101 __P101 -#define __S110 __pgprot(_PAGE_PRESENT | _PAGE_USER | \ - _PAGE_EXECUTE | _PAGE_WRITE | CACHEDEF) -#define __S111 __pgprot(_PAGE_PRESENT | _PAGE_USER | _PAGE_READ | \ - _PAGE_EXECUTE | _PAGE_WRITE | CACHEDEF) extern pgd_t swapper_pg_dir[PTRS_PER_PGD]; /* located in head.S */ diff --git a/arch/hexagon/mm/init.c b/arch/hexagon/mm/init.c index f01e91e10d95..b53595fc4103 100644 --- a/arch/hexagon/mm/init.c +++ b/arch/hexagon/mm/init.c @@ -236,3 +236,70 @@ void __init setup_arch_memory(void) * which is called by start_kernel() later on in the process */ } + +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 __pgprot(_PAGE_PRESENT | _PAGE_USER | + CACHEDEF); + case VM_READ: + return __pgprot(_PAGE_PRESENT | _PAGE_USER | + _PAGE_READ | CACHEDEF); + /* Write-only copy-on-write */ + case VM_WRITE: + return __pgprot(_PAGE_PRESENT | _PAGE_USER | + CACHEDEF); + /* Read/Write copy-on-write */ + case VM_WRITE | VM_READ: + return __pgprot(_PAGE_PRESENT | _PAGE_USER | + _PAGE_READ | CACHEDEF); + case VM_EXEC: + return __pgprot(_PAGE_PRESENT | _PAGE_USER | + _PAGE_EXECUTE | CACHEDEF); + case VM_EXEC | VM_READ: + return __pgprot(_PAGE_PRESENT | _PAGE_USER | + _PAGE_EXECUTE | _PAGE_READ | + CACHEDEF); + /* Write/execute copy-on-write */ + case VM_EXEC | VM_WRITE: + return __pgprot(_PAGE_PRESENT | _PAGE_USER | + _PAGE_EXECUTE | CACHEDEF); + /* Read/Write/Execute, copy-on-write */ + case VM_EXEC | VM_WRITE | VM_READ: + return __pgprot(_PAGE_PRESENT | _PAGE_USER | + _PAGE_EXECUTE | _PAGE_READ | + CACHEDEF); + case VM_SHARED: + return __pgprot(_PAGE_PRESENT | _PAGE_USER | + CACHEDEF); + case VM_SHARED | VM_READ: + return __pgprot(_PAGE_PRESENT | _PAGE_USER | + _PAGE_READ | CACHEDEF); + case VM_SHARED | VM_WRITE: + return __pgprot(_PAGE_PRESENT | _PAGE_USER | + _PAGE_WRITE | CACHEDEF); + case VM_SHARED | VM_WRITE | VM_READ: + return __pgprot(_PAGE_PRESENT | _PAGE_USER | + _PAGE_READ | _PAGE_WRITE | + CACHEDEF); + case VM_SHARED | VM_EXEC: + return __pgprot(_PAGE_PRESENT | _PAGE_USER | + _PAGE_EXECUTE | CACHEDEF); + case VM_SHARED | VM_EXEC | VM_READ: + return __pgprot(_PAGE_PRESENT | _PAGE_USER | + _PAGE_EXECUTE | _PAGE_READ | + CACHEDEF); + case VM_SHARED | VM_EXEC | VM_WRITE: + return __pgprot(_PAGE_PRESENT | _PAGE_USER | + _PAGE_EXECUTE | _PAGE_WRITE | + CACHEDEF); + case VM_SHARED | VM_EXEC | VM_WRITE | VM_READ: + return __pgprot(_PAGE_PRESENT | _PAGE_USER | + _PAGE_READ | _PAGE_EXECUTE | + _PAGE_WRITE | CACHEDEF); + default: + BUILD_BUG(); + } +} +EXPORT_SYMBOL(vm_get_page_prot);