Message ID | 1571419545-20401-4-git-send-email-Dave.Martin@arm.com (mailing list archive) |
---|---|
State | New, archived |
Headers | show
Return-Path: <SRS0=LC8D=YL=lists.infradead.org=linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@kernel.org> Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 47B311575 for <patchwork-linux-arm@patchwork.kernel.org>; Fri, 18 Oct 2019 17:26:53 +0000 (UTC) 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 mail.kernel.org (Postfix) with ESMTPS id 1C12D21D7C for <patchwork-linux-arm@patchwork.kernel.org>; Fri, 18 Oct 2019 17:26:53 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=lists.infradead.org header.i=@lists.infradead.org header.b="CP4CTDVH" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 1C12D21D7C Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=arm.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20170209; h=Sender: Content-Transfer-Encoding:Content-Type:MIME-Version:Cc:List-Subscribe: List-Help:List-Post:List-Archive:List-Unsubscribe:List-Id:References: In-Reply-To:Message-Id:Date:Subject:To:From:Reply-To:Content-ID: Content-Description:Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc :Resent-Message-ID:List-Owner; bh=6nNPjNLZUbxLksb0uuRCqhzJdGG10qaMvwEZX6hvAFw=; b=CP4CTDVH5f/WIi441Sd9DiZEM3 baqB2l3arQJeKb2aaoD7P49yIQwS/qVcNb/WKnpz+lezdQY6lsrWi9mMzwJ58JijaY3dJj04TIZot O01NHMMS2thgaznf2XBtQLUACHLTThZZi/60G8cKSXTb+qmYxPdV+hTGsLYfO/OlTI181yeRy56NQ gvIGDLSDLxPDxRewIMrrPlVWoF64/BHgsAw0QY66v5jC5V0Vjl7RW1ZeSkBkTQXAnwYxG30ashXJ6 ps72mna/FtTicsWF+DgSz1I7wwuUKobzjLOg5jDwpEA1U499C4kQaQW16VONUkHwESUDEmHD7R2CE L881loxQ==; Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.92.3 #3 (Red Hat Linux)) id 1iLW1c-0004gv-CC; Fri, 18 Oct 2019 17:26:52 +0000 Received: from [217.140.110.172] (helo=foss.arm.com) by bombadil.infradead.org with esmtp (Exim 4.92.3 #3 (Red Hat Linux)) id 1iLW1Y-0004cG-8J for linux-arm-kernel@lists.infradead.org; Fri, 18 Oct 2019 17:26:50 +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 0025712FC; Fri, 18 Oct 2019 10:26:44 -0700 (PDT) Received: from e103592.cambridge.arm.com (usa-sjc-imap-foss1.foss.arm.com [10.121.207.14]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPA id 19EA63F718; Fri, 18 Oct 2019 10:26:40 -0700 (PDT) From: Dave Martin <Dave.Martin@arm.com> To: linux-kernel@vger.kernel.org Subject: [PATCH v3 03/12] mm: Reserve asm-generic prot flag 0x10 for arch use Date: Fri, 18 Oct 2019 18:25:36 +0100 Message-Id: <1571419545-20401-4-git-send-email-Dave.Martin@arm.com> X-Mailer: git-send-email 2.1.4 In-Reply-To: <1571419545-20401-1-git-send-email-Dave.Martin@arm.com> References: <1571419545-20401-1-git-send-email-Dave.Martin@arm.com> X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20191018_102649_355404_6AF94879 X-CRM114-Status: GOOD ( 11.11 ) X-Spam-Score: 1.3 (+) X-Spam-Report: SpamAssassin version 3.4.2 on bombadil.infradead.org summary: Content analysis details: (1.3 points) pts rule name description ---- ---------------------- -------------------------------------------------- 0.0 SPF_HELO_NONE SPF: HELO does not publish an SPF Record -0.0 SPF_PASS SPF: sender matches SPF record 1.3 RDNS_NONE Delivered to internal network by a host with no rDNS X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: <linux-arm-kernel.lists.infradead.org> List-Unsubscribe: <http://lists.infradead.org/mailman/options/linux-arm-kernel>, <mailto:linux-arm-kernel-request@lists.infradead.org?subject=unsubscribe> List-Archive: <http://lists.infradead.org/pipermail/linux-arm-kernel/> List-Post: <mailto:linux-arm-kernel@lists.infradead.org> List-Help: <mailto:linux-arm-kernel-request@lists.infradead.org?subject=help> List-Subscribe: <http://lists.infradead.org/mailman/listinfo/linux-arm-kernel>, <mailto:linux-arm-kernel-request@lists.infradead.org?subject=subscribe> Cc: Paul Elliott <paul.elliott@arm.com>, Peter Zijlstra <peterz@infradead.org>, Catalin Marinas <catalin.marinas@arm.com>, Yu-cheng Yu <yu-cheng.yu@intel.com>, Amit Kachhap <amit.kachhap@arm.com>, Vincenzo Frascino <vincenzo.frascino@arm.com>, Will Deacon <will@kernel.org>, linux-arch@vger.kernel.org, Marc Zyngier <maz@kernel.org>, Eugene Syromiatnikov <esyr@redhat.com>, Szabolcs Nagy <szabolcs.nagy@arm.com>, "H.J. Lu" <hjl.tools@gmail.com>, Andrew Jones <drjones@redhat.com>, Kees Cook <keescook@chromium.org>, Arnd Bergmann <arnd@arndb.de>, Jann Horn <jannh@google.com>, Richard Henderson <richard.henderson@linaro.org>, =?utf-8?q?Kristina_Mart?= =?utf-8?q?=C5=A1enko?= <kristina.martsenko@arm.com>, Mark Brown <broonie@kernel.org>, Thomas Gleixner <tglx@linutronix.de>, linux-arm-kernel@lists.infradead.org, Florian Weimer <fweimer@redhat.com>, Sudakshina Das <sudi.das@arm.com> MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-arm-kernel" <linux-arm-kernel-bounces@lists.infradead.org> Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org |
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arm64: ARMv8.5-A: Branch Target Identification support
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diff --git a/include/uapi/asm-generic/mman-common.h b/include/uapi/asm-generic/mman-common.h index c160a53..81442d2 100644 --- a/include/uapi/asm-generic/mman-common.h +++ b/include/uapi/asm-generic/mman-common.h @@ -11,6 +11,7 @@ #define PROT_WRITE 0x2 /* page can be written */ #define PROT_EXEC 0x4 /* page can be executed */ #define PROT_SEM 0x8 /* page may be used for atomic ops */ + /* 0x10 reserved for arch-specific use */ #define PROT_NONE 0x0 /* page can not be accessed */ #define PROT_GROWSDOWN 0x01000000 /* mprotect flag: extend change to start of growsdown vma */ #define PROT_GROWSUP 0x02000000 /* mprotect flag: extend change to end of growsup vma */
The asm-generic mman definitions are used by a few architectures that also define an arch-specific PROT flag with value 0x10. This currently applies to sparc and powerpc, and arm64 will soon join in. To help future maintainers, document the use of this flag in the asm-generic header too. Signed-off-by: Dave Martin <Dave.Martin@arm.com> --- include/uapi/asm-generic/mman-common.h | 1 + 1 file changed, 1 insertion(+)