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=-11.0 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER, 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 88BC3C433B4 for ; Fri, 14 May 2021 11:02:55 +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 408D961459 for ; Fri, 14 May 2021 11:02:55 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 408D961459 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=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=4hA+fry2ryP4ToF6r31eD5QLw2HnzcSHd/XSKwCV6ms=; b=cVjoH/ZO4dsQ1pJi6RDPfczgu PogR91lYNlfJCQUX1hIMJiVGKHeT2XxymIplXxEm8o4T8tFpa1HeEaeJr0BFf/jLXsjXiDF5tqiNN Mi/SpsU9dnGaReV0LkjxepWdWIUc4BxZnwsCBYFCEGQjqOg/4uEaQ5P7ywys+jN34EzLDIpI4okpg eTqUiWs1Jp4u36wN33It12aTIzFmPrPMsyurNeBjrkrVMg9DmspSkKcXQLiAQZvuS5nW3RkkdWtqi /6NdqpzzIA1v6PTnT0YJgQUGYkxNKM/LUItfH48t7OS8DZz1XDkGKOXBlFDveFMoh+ftgUYh54Tvy o5yxW7Zpg==; Received: from localhost ([::1] helo=desiato.infradead.org) by desiato.infradead.org with esmtp (Exim 4.94 #2 (Red Hat Linux)) id 1lhVZK-007po2-6a; Fri, 14 May 2021 11:01:22 +0000 Received: from bombadil.infradead.org ([2607:7c80:54:e::133]) by desiato.infradead.org with esmtps (Exim 4.94 #2 (Red Hat Linux)) id 1lhVZI-007pnj-Fi for linux-arm-kernel@desiato.infradead.org; Fri, 14 May 2021 11:01:20 +0000 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=bombadil.20210309; h=In-Reply-To:Content-Type:MIME-Version :References:Message-ID:Subject:Cc:To:From:Date:Sender:Reply-To: Content-Transfer-Encoding:Content-ID:Content-Description; bh=PLM5yVCtR6/q/rXF4ZfVD8SuotcBbFSzGLOYLV22qsg=; b=KAMxkXZZsljL2P3xJLJfIM6wig DPSHDfJl+u4Nw5qSam0FoF7Yobehf0IE53arDAnxiOlFdEu2rIPtBWVUq6vSV0odhjxojN6dNB26g ISbj1ncY46dYN06Oejq+FMOcdG6zbddGbEwwXfh7nmfsJaKjE4SEeUy9nncaW+dEoVB6rRibwdwIr RQhRKhPe9UcfpqYETEDIzFTbYNRCV7BMANGOsXdmEtwLO71Rgua8H93F/ruSpQu0bnwVgqWFTNvlu hBDTzOkyo3mOOFsqo8o6WQLaWxR2TQhgZPmvVz/kt03kqusZixTTzVPrXRoJ5EwvgufDN22gjzWV5 NWAF8n4g==; Received: from mail.kernel.org ([198.145.29.99]) by bombadil.infradead.org with esmtps (Exim 4.94 #2 (Red Hat Linux)) id 1lhVZG-00Bv2p-4R for linux-arm-kernel@lists.infradead.org; Fri, 14 May 2021 11:01:19 +0000 Received: by mail.kernel.org (Postfix) with ESMTPSA id E01C961457; Fri, 14 May 2021 11:01:16 +0000 (UTC) Date: Fri, 14 May 2021 12:01:14 +0100 From: Catalin Marinas To: Mark Brown Cc: Will Deacon , linux-arm-kernel@lists.infradead.org, Marc Zyngier Subject: Re: [PATCH] arm64: Document requirement for access to FEAT_HCX Message-ID: <20210514110114.GD855@arm.com> References: <20210512162350.20349-1-broonie@kernel.org> MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: <20210512162350.20349-1-broonie@kernel.org> 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-20210514_040118_213111_3337D50B X-CRM114-Status: UNSURE ( 9.36 ) X-CRM114-Notice: Please train this message. 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 Wed, May 12, 2021 at 05:23:50PM +0100, Mark Brown wrote: > v8.7 of the architecture introduced FEAT_HCX which adds an additional > hypervisor configuration register HCRX_EL2. Even though Linux does not > currently make use of this feature let's document that the EL3 trap for > access to the register should be disabled so that we are able to make > use of it in future. > > Signed-off-by: Mark Brown Acked-by: Catalin Marinas _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel