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 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 smtp.lore.kernel.org (Postfix) with ESMTPS id B3519C433EF for ; Wed, 23 Feb 2022 15:34:14 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; 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=Jnq/1TVCNWKF3T1yxGMl/ccjiuUyQrEh/jaQyIT8p2s=; b=TmPba9BAaq92zj vuEUbmbvJ5Arbvf8gMiQPfs+6AxCu331H9YlzjBZhLvPwb3q3Ehpvxga7LFkNsi6BIjROjbdz6b4I ck1FHbADoa1bK/gQQaE1e4WAWRkrNcHntjbDeec+GZrkotFl6N/wxjVHBYd31e0tZCbCv2zqen5A+ CaERIg69c6PHXC8OI5UMc/OXQR6t6vEwiVEODR5yWm+6TUjO1NvEJ22rr9yEAGJSmr9rzZ6dv+DCx 0i5vMeP9pPvCwM1TP2g8zJJhmG/EnngiRPs6yycwbP5df/pUtCc1zhKTtiv46/CdTlPm82ym+GqCC aU+BHQ9mWe4FNFggB6Zw==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.94.2 #2 (Red Hat Linux)) id 1nMtdc-00F2rA-Gv; Wed, 23 Feb 2022 15:33:08 +0000 Received: from dfw.source.kernel.org ([2604:1380:4641:c500::1]) by bombadil.infradead.org with esmtps (Exim 4.94.2 #2 (Red Hat Linux)) id 1nMtdY-00F2pH-3e for linux-arm-kernel@lists.infradead.org; Wed, 23 Feb 2022 15:33:05 +0000 Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by dfw.source.kernel.org (Postfix) with ESMTPS id AC76A61803; Wed, 23 Feb 2022 15:33:03 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id B34F8C340EB; Wed, 23 Feb 2022 15:32:59 +0000 (UTC) Date: Wed, 23 Feb 2022 15:32:56 +0000 From: Catalin Marinas To: Mark Brown Cc: Will Deacon , Marc Zyngier , Shuah Khan , Shuah Khan , Alan Hayward , Luis Machado , Salil Akerkar , Basant Kumar Dwivedi , Szabolcs Nagy , James Morse , Alexandru Elisei , Suzuki K Poulose , linux-arm-kernel@lists.infradead.org, linux-kselftest@vger.kernel.org, kvmarm@lists.cs.columbia.edu Subject: Re: [PATCH v11 26/40] KVM: arm64: Hide SME system registers from guests Message-ID: References: <20220207152109.197566-1-broonie@kernel.org> <20220207152109.197566-27-broonie@kernel.org> MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: <20220207152109.197566-27-broonie@kernel.org> X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20220223_073304_216753_B7DB4ACF X-CRM114-Status: GOOD ( 11.13 ) 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 Mon, Feb 07, 2022 at 03:20:55PM +0000, Mark Brown wrote: > For the time being we do not support use of SME by KVM guests, support for > this will be enabled in future. In order to prevent any side effects or > side channels via the new system registers, including the EL0 read/write > register TPIDR2, explicitly undefine all the system registers added by > SME and mask out the SME bitfield in SYS_ID_AA64PFR1. > > Signed-off-by: Mark Brown Reviewed-by: Catalin Marinas _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel