From patchwork Mon Feb 21 06:38:37 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Anshuman Khandual X-Patchwork-Id: 12753147 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 CCA4BC433FE for ; Mon, 21 Feb 2022 06:40:22 +0000 (UTC) Received: by kanga.kvack.org (Postfix) id 5A0E78D001A; Mon, 21 Feb 2022 01:40:22 -0500 (EST) Received: by kanga.kvack.org (Postfix, from userid 40) id 54FE18D0001; Mon, 21 Feb 2022 01:40:22 -0500 (EST) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 3F08C8D001A; Mon, 21 Feb 2022 01:40:22 -0500 (EST) X-Delivered-To: linux-mm@kvack.org Received: from forelay.hostedemail.com (smtprelay0231.hostedemail.com [216.40.44.231]) by kanga.kvack.org (Postfix) with ESMTP id 2F6128D0001 for ; Mon, 21 Feb 2022 01:40:22 -0500 (EST) Received: from smtpin14.hostedemail.com (10.5.19.251.rfc1918.com [10.5.19.251]) by forelay05.hostedemail.com (Postfix) with ESMTP id EF958181CA08B for ; Mon, 21 Feb 2022 06:40:21 +0000 (UTC) X-FDA: 79165837842.14.E7212F4 Received: from foss.arm.com (foss.arm.com [217.140.110.172]) by imf16.hostedemail.com (Postfix) with ESMTP id 6B201180003 for ; Mon, 21 Feb 2022 06:40:21 +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 EF3F41476; Sun, 20 Feb 2022 22:40:20 -0800 (PST) Received: from p8cg001049571a15.arm.com (unknown [10.163.49.67]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPA id 649E53F70D; Sun, 20 Feb 2022 22:40:18 -0800 (PST) From: Anshuman Khandual To: linux-mm@kvack.org, akpm@linux-foundation.org Cc: linux-kernel@vger.kernel.org, Anshuman Khandual , Christoph Hellwig , linux-arch@vger.kernel.org, linux-ia64@vger.kernel.org Subject: [PATCH V2 28/30] ia64/mm: Enable ARCH_HAS_VM_GET_PAGE_PROT Date: Mon, 21 Feb 2022 12:08:37 +0530 Message-Id: <1645425519-9034-29-git-send-email-anshuman.khandual@arm.com> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1645425519-9034-1-git-send-email-anshuman.khandual@arm.com> References: <1645425519-9034-1-git-send-email-anshuman.khandual@arm.com> X-Rspam-User: X-Rspamd-Server: rspam12 X-Rspamd-Queue-Id: 6B201180003 X-Stat-Signature: r7kbw4bywbw6d77kngnnx8sfyinpamkn Authentication-Results: imf16.hostedemail.com; dkim=none; dmarc=pass (policy=none) header.from=arm.com; spf=pass (imf16.hostedemail.com: domain of anshuman.khandual@arm.com designates 217.140.110.172 as permitted sender) smtp.mailfrom=anshuman.khandual@arm.com X-HE-Tag: 1645425621-379177 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 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: linux-ia64@vger.kernel.org Cc: linux-kernel@vger.kernel.org Signed-off-by: Anshuman Khandual --- arch/ia64/Kconfig | 1 + arch/ia64/include/asm/pgtable.h | 17 -------------- arch/ia64/mm/init.c | 41 ++++++++++++++++++++++++++++++++- 3 files changed, 41 insertions(+), 18 deletions(-) diff --git a/arch/ia64/Kconfig b/arch/ia64/Kconfig index a7e01573abd8..0ab15e8d5783 100644 --- a/arch/ia64/Kconfig +++ b/arch/ia64/Kconfig @@ -11,6 +11,7 @@ config IA64 select ARCH_HAS_DMA_MARK_CLEAN select ARCH_HAS_STRNCPY_FROM_USER select ARCH_HAS_STRNLEN_USER + select ARCH_HAS_VM_GET_PAGE_PROT select ARCH_MIGHT_HAVE_PC_PARPORT select ARCH_MIGHT_HAVE_PC_SERIO select ACPI diff --git a/arch/ia64/include/asm/pgtable.h b/arch/ia64/include/asm/pgtable.h index 9584b2c5f394..8154c78bba56 100644 --- a/arch/ia64/include/asm/pgtable.h +++ b/arch/ia64/include/asm/pgtable.h @@ -161,23 +161,6 @@ * attempts to write to the page. */ /* xwr */ -#define __P000 PAGE_NONE -#define __P001 PAGE_READONLY -#define __P010 PAGE_READONLY /* write to priv pg -> copy & make writable */ -#define __P011 PAGE_READONLY /* ditto */ -#define __P100 __pgprot(__ACCESS_BITS | _PAGE_PL_3 | _PAGE_AR_X_RX) -#define __P101 __pgprot(__ACCESS_BITS | _PAGE_PL_3 | _PAGE_AR_RX) -#define __P110 PAGE_COPY_EXEC -#define __P111 PAGE_COPY_EXEC - -#define __S000 PAGE_NONE -#define __S001 PAGE_READONLY -#define __S010 PAGE_SHARED /* we don't have (and don't need) write-only */ -#define __S011 PAGE_SHARED -#define __S100 __pgprot(__ACCESS_BITS | _PAGE_PL_3 | _PAGE_AR_X_RX) -#define __S101 __pgprot(__ACCESS_BITS | _PAGE_PL_3 | _PAGE_AR_RX) -#define __S110 __pgprot(__ACCESS_BITS | _PAGE_PL_3 | _PAGE_AR_RWX) -#define __S111 __pgprot(__ACCESS_BITS | _PAGE_PL_3 | _PAGE_AR_RWX) #define pgd_ERROR(e) printk("%s:%d: bad pgd %016lx.\n", __FILE__, __LINE__, pgd_val(e)) #if CONFIG_PGTABLE_LEVELS == 4 diff --git a/arch/ia64/mm/init.c b/arch/ia64/mm/init.c index 5d165607bf35..2a922883e30f 100644 --- a/arch/ia64/mm/init.c +++ b/arch/ia64/mm/init.c @@ -273,7 +273,7 @@ static int __init gate_vma_init(void) gate_vma.vm_start = FIXADDR_USER_START; gate_vma.vm_end = FIXADDR_USER_END; gate_vma.vm_flags = VM_READ | VM_MAYREAD | VM_EXEC | VM_MAYEXEC; - gate_vma.vm_page_prot = __P101; + gate_vma.vm_page_prot = __pgprot(__ACCESS_BITS | _PAGE_PL_3 | _PAGE_AR_RX); return 0; } @@ -492,3 +492,42 @@ void arch_remove_memory(u64 start, u64 size, struct vmem_altmap *altmap) __remove_pages(start_pfn, nr_pages, altmap); } #endif + +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: + /* write to priv pg -> copy & make writable */ + case VM_WRITE: + /* write to priv pg -> copy & make writable */ + case VM_WRITE | VM_READ: + return PAGE_READONLY; + case VM_EXEC: + return __pgprot(__ACCESS_BITS | _PAGE_PL_3 | _PAGE_AR_X_RX); + case VM_EXEC | VM_READ: + return __pgprot(__ACCESS_BITS | _PAGE_PL_3 | _PAGE_AR_RX); + case VM_EXEC | VM_WRITE: + case VM_EXEC | VM_WRITE | VM_READ: + return PAGE_COPY_EXEC; + case VM_SHARED: + return PAGE_NONE; + case VM_SHARED | VM_READ: + return PAGE_READONLY; + /* we don't have (and don't need) write-only */ + case VM_SHARED | VM_WRITE: + case VM_SHARED | VM_WRITE | VM_READ: + return PAGE_SHARED; + case VM_SHARED | VM_EXEC: + return __pgprot(__ACCESS_BITS | _PAGE_PL_3 | _PAGE_AR_X_RX); + case VM_SHARED | VM_EXEC | VM_READ: + return __pgprot(__ACCESS_BITS | _PAGE_PL_3 | _PAGE_AR_RX); + case VM_SHARED | VM_EXEC | VM_WRITE: + case VM_SHARED | VM_EXEC | VM_WRITE | VM_READ: + return __pgprot(__ACCESS_BITS | _PAGE_PL_3 | _PAGE_AR_RWX); + default: + BUILD_BUG(); + } +} +EXPORT_SYMBOL(vm_get_page_prot);