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=-10.1 required=3.0 tests=BAYES_00,DKIM_INVALID, DKIM_SIGNED,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER, MAILING_LIST_MULTI,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 41EB3C07E94 for ; Fri, 4 Jun 2021 14:07:43 +0000 (UTC) Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) (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 C5A0B61405 for ; Fri, 4 Jun 2021 14:07:42 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org C5A0B61405 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=redhat.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Received: from localhost ([::1]:47586 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1lpAU9-0007pf-Tw for qemu-devel@archiver.kernel.org; Fri, 04 Jun 2021 10:07:41 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:44092) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1lpATT-00078T-Jf for qemu-devel@nongnu.org; Fri, 04 Jun 2021 10:06:59 -0400 Received: from us-smtp-delivery-124.mimecast.com ([216.205.24.124]:56585) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1lpATR-0001wb-R8 for qemu-devel@nongnu.org; Fri, 04 Jun 2021 10:06:59 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1622815616; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: in-reply-to:in-reply-to:references:references; bh=bAQx3drSo/aaHUi7HQXqJBHHCrkrrlqn72OVCZXBmxc=; b=eUYJBli9/pUv7O4XANEeTG9T1puiCwwJG8rHjY+5L/y9BWVckxYqJ0UU6e+4tpW+IN/axS MK4sekVDs/dabA4b4J3merGh/MJdeYz52APnXJvYMdt4GuIPlRxyPbiM/c5Bc4+DSdd8rk /E9Zm0GBclBMV3KRs90ll9m+elcjbqk= Received: from mimecast-mx01.redhat.com (mimecast-mx01.redhat.com [209.132.183.4]) (Using TLS) by relay.mimecast.com with ESMTP id us-mta-529-mYXHlTVLPhSSMiFyxA-ojQ-1; Fri, 04 Jun 2021 10:06:54 -0400 X-MC-Unique: mYXHlTVLPhSSMiFyxA-ojQ-1 Received: from smtp.corp.redhat.com (int-mx06.intmail.prod.int.phx2.redhat.com [10.5.11.16]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx01.redhat.com (Postfix) with ESMTPS id 7F84B805F03 for ; Fri, 4 Jun 2021 14:06:53 +0000 (UTC) Received: from redhat.com (ovpn-113-53.phx2.redhat.com [10.3.113.53]) by smtp.corp.redhat.com (Postfix) with ESMTPS id 029CE5C1C5; Fri, 4 Jun 2021 14:06:52 +0000 (UTC) Date: Fri, 4 Jun 2021 09:06:51 -0500 From: Eric Blake To: Vitaly Kuznetsov Subject: Re: [PATCH v7 8/9] i386: Hyper-V SynIC requires POST_MESSAGES/SIGNAL_EVENTS priviliges Message-ID: <20210604140651.oq47qrda5uc6hrpq@redhat.com> References: <20210603114835.847451-1-vkuznets@redhat.com> <20210603114835.847451-9-vkuznets@redhat.com> MIME-Version: 1.0 In-Reply-To: <20210603114835.847451-9-vkuznets@redhat.com> User-Agent: NeoMutt/20210205 X-Scanned-By: MIMEDefang 2.79 on 10.5.11.16 Authentication-Results: relay.mimecast.com; auth=pass smtp.auth=CUSA124A263 smtp.mailfrom=eblake@redhat.com X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: redhat.com Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Received-SPF: pass client-ip=216.205.24.124; envelope-from=eblake@redhat.com; helo=us-smtp-delivery-124.mimecast.com X-Spam_score_int: -31 X-Spam_score: -3.2 X-Spam_bar: --- X-Spam_report: (-3.2 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-0.373, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_LOW=-0.7, RCVD_IN_MSPIKE_H4=0.001, RCVD_IN_MSPIKE_WL=0.001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Paolo Bonzini , Igor Mammedov , Marcelo Tosatti , qemu-devel@nongnu.org, Eduardo Habkost Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" On Thu, Jun 03, 2021 at 01:48:34PM +0200, Vitaly Kuznetsov wrote: In the subject, s/priviliges/privileges/ > When Hyper-V SynIC is enabled, we may need to allow Windows guests to make > hypercalls (POST_MESSAGES/SIGNAL_EVENTS). No issue is currently observed > because KVM is very permissive, allowing these hypercalls regarding of > guest visible CPUid bits. > > Signed-off-by: Vitaly Kuznetsov -- Eric Blake, Principal Software Engineer Red Hat, Inc. +1-919-301-3266 Virtualization: qemu.org | libvirt.org