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=-8.5 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_HELO_NONE, SPF_PASS,URIBL_BLOCKED,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 195B4C388F7 for ; Thu, 5 Nov 2020 22:51:15 +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 972F6206CA for ; Thu, 5 Nov 2020 22:51:14 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=lists.infradead.org header.i=@lists.infradead.org header.b="eIJfMNkJ"; dkim=fail reason="signature verification failed" (1024-bit key) header.d=kernel.org header.i=@kernel.org header.b="OfFoo/WX" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 972F6206CA 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=merlin.20170209; h=Sender:Content-Transfer-Encoding: Content-Type:Cc:List-Subscribe:List-Help:List-Post:List-Archive: List-Unsubscribe:List-Id:In-Reply-To:MIME-Version:References:Message-ID: Subject: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=6UjSg+ANuzSdM50nZg5u4K8NC2NOz6Tiem0I68BaVEs=; b=eIJfMNkJxscF8PdcBwhVt75Pd oDw8eeixFQeo6LtebNLbz6L8aprSgy+w5Wnmcc9da4LHHtM0XUkvsj31oHfxqJkkJJO6Q8BTf4RPW XLJErs+H960w75OTLrx1wLUjNwB/zfe280vZolVBLwQc+oI+fApZ2i2IyOSBCYPk3yZ5F/T5mpqc2 6dRZf+aExqSlAoygs3z7EGn0MayjD/BVlrRtGW58VU21/1VX2Ow9P8MBO8+jL7qXq4ctNSQAR8Uct JHAf/RoniyKASODWeouhk4jt0DZKv6lnDUS+1S2bWzvk8GoYVYeXPdZQFILCCuG7W8o7VLhY7MG7M Ol4hd/Xsg==; Received: from localhost ([::1] helo=merlin.infradead.org) by merlin.infradead.org with esmtp (Exim 4.92.3 #3 (Red Hat Linux)) id 1kao5i-0005X8-Ud; Thu, 05 Nov 2020 22:50:50 +0000 Received: from mail.kernel.org ([198.145.29.99]) by merlin.infradead.org with esmtps (Exim 4.92.3 #3 (Red Hat Linux)) id 1kao5g-0005WN-Pr for linux-arm-kernel@lists.infradead.org; Thu, 05 Nov 2020 22:50:49 +0000 Received: from willie-the-truck (236.31.169.217.in-addr.arpa [217.169.31.236]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id 33C07206CA; Thu, 5 Nov 2020 22:50:45 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1604616646; bh=i0KTUnwHXRywNXytlunN2AFWsQbhzt3gRCrTn0gzgpg=; h=Date:From:To:Cc:Subject:References:In-Reply-To:From; b=OfFoo/WXvxdNy1NAYDKVfo8AJKU+9jfnTaskPF4Ua1vcLBIjqdZAPKlSDmgIbVtCc nHCrsd/ea4VC+HOSOzeKvYUCbNXx5gVY/wN4YMuxTJlJma94Tfqwe+jS7Bp3vlVDbb QiPOaeNW/rVzB3o0Oddmd1x1WCHc1R6WS0bP5kj8= Date: Thu, 5 Nov 2020 22:50:42 +0000 From: Will Deacon To: Marc Zyngier Subject: Re: [PATCH 3/3] KVM: arm64: Handle SCXTNUM_ELx traps Message-ID: <20201105225041.GF8842@willie-the-truck> References: <20201103171445.271195-1-maz@kernel.org> <20201103171445.271195-4-maz@kernel.org> MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: <20201103171445.271195-4-maz@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-20201105_175048_971868_16B27EA1 X-CRM114-Status: GOOD ( 12.42 ) 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: kvm@vger.kernel.org, Suzuki K Poulose , Peng Liang , James Morse , Julien Thierry , kernel-team@android.com, kvmarm@lists.cs.columbia.edu, linux-arm-kernel@lists.infradead.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 On Tue, Nov 03, 2020 at 05:14:45PM +0000, Marc Zyngier wrote: > As the kernel never sets HCR_EL2.EnSCXT, accesses to SCXTNUM_ELx > will trap to EL2. Let's handle that as gracefully as possible > by injecting an UNDEF exception into the guest. This is consistent > with the guest's view of ID_AA64PFR0_EL1.CSV2 being at most 1. > > Signed-off-by: Marc Zyngier > --- > arch/arm64/include/asm/sysreg.h | 4 ++++ > arch/arm64/kvm/sys_regs.c | 4 ++++ > 2 files changed, 8 insertions(+) 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