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 X-Spam-Level: X-Spam-Status: No, score=-6.8 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI, SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT autolearn=no autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 9D20CC55ABD for ; Fri, 13 Nov 2020 15:21:07 +0000 (UTC) Received: from merlin.infradead.org (merlin.infradead.org [205.233.59.134]) (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 40C3D2223C for ; Fri, 13 Nov 2020 15:21:07 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=lists.infradead.org header.i=@lists.infradead.org header.b="t8A+B4AO" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 40C3D2223C Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=arm.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=merlin.20170209; h=Sender:Content-Transfer-Encoding: Content-Type:Cc:List-Subscribe:List-Help:List-Post:List-Archive: List-Unsubscribe:List-Id:MIME-Version: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:In-Reply-To:References:List-Owner; bh=NU5RZsbBsFaKwnsAZ6RvR7s9loNuo4MIIX0gZNYWw0w=; b=t8A+B4AO4zkapax2NzaZZWFF35 rYPNxlw55s71XQEULPKLxh3kSFilOjASs4TwDHYRyVtfhbaEEg/oB/oV50y+XUo+ap4D9J+WlDvIf NmHSU0o2IUdEAzMYELIMWpGiQeckSWyJD8MTgUy2fk+XP3/ShWgasr5qcE/U4i7+98o9r3vmvqfky /hoZrlBQIsH8D78s2UOMe8kAPelrWmQ1bMapJk0+93hpjVETfFJqfAQseuj6xKU7QZeCpwlhrn+UV vbZ3K5Sq7jjSxYgi/xz/lem8oBQTfqgkTR00xX+V8zK04j5J4goiMhOeoOz+LDY+qKaX85hrQYeZA GNq4CkpQ==; Received: from localhost ([::1] helo=merlin.infradead.org) by merlin.infradead.org with esmtp (Exim 4.92.3 #3 (Red Hat Linux)) id 1kdasY-0001GQ-BM; Fri, 13 Nov 2020 15:20:46 +0000 Received: from foss.arm.com ([217.140.110.172]) by merlin.infradead.org with esmtp (Exim 4.92.3 #3 (Red Hat Linux)) id 1kdasV-0001FJ-9R for linux-arm-kernel@lists.infradead.org; Fri, 13 Nov 2020 15:20:44 +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 F03781042; Fri, 13 Nov 2020 07:20:38 -0800 (PST) Received: from login2.euhpc.arm.com (login2.euhpc.arm.com [10.6.27.34]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPA id 4ECF73F718; Fri, 13 Nov 2020 07:20:38 -0800 (PST) From: Vladimir Murzin To: linux-arm-kernel@lists.infradead.org Subject: [RFC PATCH 0/2] arm64: Support Enhanced PAN Date: Fri, 13 Nov 2020 15:20:21 +0000 Message-Id: <20201113152023.102855-1-vladimir.murzin@arm.com> X-Mailer: git-send-email 2.24.0 MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20201113_102043_409722_9920B5E8 X-CRM114-Status: GOOD ( 10.04 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: catalin.marinas@arm.com, keescook@chromium.org Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org Hi ARM architecture gains support of Enhanced Privileged Access Never (EPAN) which allows Privileged Access Never to be used with Execute-only mappings. As a consequence 24cecc377463 ("arm64: Revert support for execute-only user mappings") can be revisited and re-enabled. Thanks! Vladimir Murzin (2): arm64: Support execute-only permissions with Enhanced PAN arm64: Expose EPAN support via HWCAPS2_EPAN arch/arm64/Kconfig | 17 +++++++++++++++++ arch/arm64/include/asm/cpucaps.h | 3 ++- arch/arm64/include/asm/hwcap.h | 1 + arch/arm64/include/asm/pgtable-prot.h | 5 +++-- arch/arm64/include/asm/pgtable.h | 23 +++++++++++++++++++++-- arch/arm64/include/asm/sysreg.h | 2 ++ arch/arm64/include/uapi/asm/hwcap.h | 1 + arch/arm64/kernel/cpufeature.c | 23 +++++++++++++++++++++++ arch/arm64/kernel/cpuinfo.c | 1 + arch/arm64/mm/fault.c | 3 +++ 10 files changed, 74 insertions(+), 5 deletions(-) -- 2.7.4 _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel