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=-15.7 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,INCLUDES_CR_TRAILER,INCLUDES_PATCH,MAILING_LIST_MULTI, SPF_HELO_NONE,SPF_PASS,USER_AGENT_SANE_1 autolearn=ham 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 4ABA6C433DB for ; Thu, 25 Mar 2021 19:08:18 +0000 (UTC) Received: from desiato.infradead.org (desiato.infradead.org [90.155.92.199]) (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 CD9E161A25 for ; Thu, 25 Mar 2021 19:08:17 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org CD9E161A25 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=kernel.org 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=desiato.20200630; h=Sender:Content-Transfer-Encoding :Content-Type:List-Subscribe:List-Help:List-Post:List-Archive: List-Unsubscribe:List-Id:In-Reply-To:MIME-Version:References:Message-ID: Subject:Cc:To:From:Date:Reply-To:Content-ID:Content-Description:Resent-Date: Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Owner; bh=3m5RJrjzM9/AzA0H+r66+jxtUZOGGWBreGi5FLlAOMc=; b=SI/R7HHn2ach/IND5M4c5cIWf L24lvg14gvKJV+JDiqnlBZChqWvMJ02FpmsCFG9/Z60SqcQXEU7pfY3JLAI/BXMixbXTN/groVxh4 5QR2X31il+anPPVcPIDrmEh+X+cozcrsXqWvmkK1Juk+ksHRNmC9+n/vtfpRV6FPo/p7Z0yBp5aH4 CYx1KyessWrLxuxIMAyLtpdc2s9fgjcTUIsisBmuIHLhnVgdDd2pASur00RhWSoi2bj3wPlCalo4L /wA69X3wdwPsDH5+eOK7L0Ybnu6zjrkR8/+1l79DD2eGVb0m/kLljhSMJRbqC79T/gsiYECjorprR jP/Ve679Q==; Received: from localhost ([::1] helo=desiato.infradead.org) by desiato.infradead.org with esmtp (Exim 4.94 #2 (Red Hat Linux)) id 1lPVJc-00236r-C0; Thu, 25 Mar 2021 19:06:44 +0000 Received: from mail.kernel.org ([198.145.29.99]) by desiato.infradead.org with esmtps (Exim 4.94 #2 (Red Hat Linux)) id 1lPVJX-00235j-6n for linux-arm-kernel@lists.infradead.org; Thu, 25 Mar 2021 19:06:40 +0000 Received: by mail.kernel.org (Postfix) with ESMTPSA id BDCEB61A25; Thu, 25 Mar 2021 19:06:36 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1616699197; bh=syzm0ZSFcg9wqczP+523EjSfR3d8QUVvGN57fePcbjQ=; h=Date:From:To:Cc:Subject:References:In-Reply-To:From; b=XbVL6mr+X0aFYDjYvBHvi4euvf4zcfx8g/muNDFzm0xdaQ3zY8w85WB0IymEmFpPx WKEyB2E+RpW+6SBAjznhN89C40URYnqFGrkPZ5iRpajC6uMS2CLKkHiI58fXniq7wY bZjAWPcyGaPZwU6WCbUHdvYTUh6z1xACIY4MEx6GmmdJJpqKHsu9Oe/M2wXLy+36sU NhEnROwrTbZ5Jj10ixuoIsm1CZirUbrWTdfML0rz3K5Z1Vmc4P9GAXVlCUq6DitRas p4x/DL3764Xn91V3SxER1GDvXGZ8QxgEOZcjejptcHDnqg9s7zIrxJDGHQ1aZrz18D R38izEjbTiczw== Date: Thu, 25 Mar 2021 19:06:33 +0000 From: Will Deacon To: Vladimir Murzin Cc: linux-arm-kernel@lists.infradead.org, keescook@chromium.org, dave.martin@arm.com, catalin.marinas@arm.com Subject: Re: [PATCH v4 1/2] arm64: Support execute-only permissions with Enhanced PAN Message-ID: <20210325190632.GD15860@willie-the-truck> References: <20210312173811.58284-1-vladimir.murzin@arm.com> <20210312173811.58284-2-vladimir.murzin@arm.com> MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: <20210312173811.58284-2-vladimir.murzin@arm.com> User-Agent: Mutt/1.10.1 (2018-07-13) X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20210325_190639_451158_9C073C95 X-CRM114-Status: GOOD ( 10.73 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , 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 On Fri, Mar 12, 2021 at 05:38:10PM +0000, Vladimir Murzin wrote: > Enhanced Privileged Access Never (EPAN) allows Privileged Access Never > to be used with Execute-only mappings. > > Absence of such support was a reason for 24cecc377463 ("arm64: Revert > support for execute-only user mappings"). Thus now it can be revisited > and re-enabled. > > Cc: Kees Cook > Cc: Catalin Marinas > Signed-off-by: Vladimir Murzin > --- > arch/arm64/Kconfig | 17 +++++++++++++++ > arch/arm64/include/asm/cpucaps.h | 3 ++- > arch/arm64/include/asm/pgtable-prot.h | 5 +++-- > arch/arm64/include/asm/pgtable.h | 31 ++++++++++++++++++++------- > arch/arm64/include/asm/sysreg.h | 3 ++- > arch/arm64/kernel/cpufeature.c | 12 +++++++++++ > arch/arm64/mm/fault.c | 18 +++++++++++++++- > mm/mmap.c | 6 ++++++ > 8 files changed, 82 insertions(+), 13 deletions(-) Acked-by: Will Deacon Will _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel