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=-13.0 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_CR_TRAILER,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS, USER_AGENT_SANE_1 autolearn=unavailable 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 8FA12C4320A for ; Fri, 30 Jul 2021 14:29:53 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 78C4160F01 for ; Fri, 30 Jul 2021 14:29:53 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S239217AbhG3O35 (ORCPT ); Fri, 30 Jul 2021 10:29:57 -0400 Received: from smtp-fw-9103.amazon.com ([207.171.188.200]:10765 "EHLO smtp-fw-9103.amazon.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230260AbhG3O3z (ORCPT ); Fri, 30 Jul 2021 10:29:55 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=amazon.de; i=@amazon.de; q=dns/txt; s=amazon201209; t=1627655391; x=1659191391; h=date:from:to:cc:message-id:references:mime-version: in-reply-to:subject; bh=4ugGiWQLoikc/lxB+XFb2AusVBQMiZ2U9lIaxumsem8=; b=UBa70MqBX7NOlP4fYWMWG7nAdfG1RD+awih3V3tJoKgaguzUKxCZ03W7 Xm7rDXA8WMAVcP4TqN+KxtNoYi1TBWphmD8Ozmu48A4qeVrvmMAIvV0RR Z0TGGMbEgoCoAFoRWBqIfBqJv1O1o1Ewf1M0Wot2QUKBLh0683u7FfyLA A=; X-IronPort-AV: E=Sophos;i="5.84,282,1620691200"; d="scan'208";a="947326459" Subject: Re: [PATCH 1/4] KVM: x86: hyper-v: Check access to hypercall before reading XMM registers Received: from pdx4-co-svc-p1-lb2-vlan2.amazon.com (HELO email-inbound-relay-2b-4ff6265a.us-west-2.amazon.com) ([10.25.36.210]) by smtp-border-fw-9103.sea19.amazon.com with ESMTP; 30 Jul 2021 14:29:43 +0000 Received: from EX13D28EUC003.ant.amazon.com (pdx1-ws-svc-p6-lb9-vlan3.pdx.amazon.com [10.236.137.198]) by email-inbound-relay-2b-4ff6265a.us-west-2.amazon.com (Postfix) with ESMTPS id 97D37A232E; Fri, 30 Jul 2021 14:29:42 +0000 (UTC) Received: from u366d62d47e3651.ant.amazon.com (10.43.160.41) by EX13D28EUC003.ant.amazon.com (10.43.164.43) with Microsoft SMTP Server (TLS) id 15.0.1497.23; Fri, 30 Jul 2021 14:29:38 +0000 Date: Fri, 30 Jul 2021 16:29:34 +0200 From: Siddharth Chandrasekaran To: Vitaly Kuznetsov CC: , Paolo Bonzini , Sean Christopherson , Wanpeng Li , Jim Mattson , Message-ID: <20210730142933.GA20232@u366d62d47e3651.ant.amazon.com> References: <20210730122625.112848-1-vkuznets@redhat.com> <20210730122625.112848-2-vkuznets@redhat.com> MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Disposition: inline In-Reply-To: <20210730122625.112848-2-vkuznets@redhat.com> User-Agent: Mutt/1.9.4 (2018-02-28) X-Originating-IP: [10.43.160.41] X-ClientProxiedBy: EX13D10UWB001.ant.amazon.com (10.43.161.111) To EX13D28EUC003.ant.amazon.com (10.43.164.43) Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Fri, Jul 30, 2021 at 02:26:22PM +0200, Vitaly Kuznetsov wrote: > In case guest doesn't have access to the particular hypercall we can avoid > reading XMM registers. > > Signed-off-by: Vitaly Kuznetsov Reviewed-by: Siddharth Chandrasekaran Amazon Development Center Germany GmbH Krausenstr. 38 10117 Berlin Geschaeftsfuehrung: Christian Schlaeger, Jonathan Weiss Eingetragen am Amtsgericht Charlottenburg unter HRB 149173 B Sitz: Berlin Ust-ID: DE 289 237 879