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 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 smtp.lore.kernel.org (Postfix) with ESMTPS id 6710AC433F5 for ; Sun, 6 Mar 2022 11:06:38 +0000 (UTC) Received: from localhost ([::1]:33186 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1nQoii-0005zZ-Vf for qemu-devel@archiver.kernel.org; Sun, 06 Mar 2022 06:06:37 -0500 Received: from eggs.gnu.org ([209.51.188.92]:53778) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1nQogL-0005Gf-5d for qemu-devel@nongnu.org; Sun, 06 Mar 2022 06:04:09 -0500 Received: from us-smtp-delivery-124.mimecast.com ([170.10.133.124]:47409) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1nQogH-0006pY-Rb for qemu-devel@nongnu.org; Sun, 06 Mar 2022 06:04:07 -0500 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1646564643; 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=SqbiZzv4Jh6+DQqrPRGzXQQ0/kRA1zZUTyKBjx3NUmo=; b=ZVTlMdL3NX8w8PhOm7XwNgB+rlpm0ruUltEhwnbOGkOyBjzTC5/UBQOiSlzL3ZC49WWPmK u+Gd3t0NG3o2TEHhsklh/GYJwC9IsC7NpkGq0Sg46Y1OZCXe6u8PVw9C9026TzhloF2qZF btlymcKNcjXqiPXESOM29ufhotTMLPU= Received: from mail-wm1-f72.google.com (mail-wm1-f72.google.com [209.85.128.72]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id us-mta-178-JcWoRwiaOSmDgeZ7ZBmB4w-1; Sun, 06 Mar 2022 06:04:01 -0500 X-MC-Unique: JcWoRwiaOSmDgeZ7ZBmB4w-1 Received: by mail-wm1-f72.google.com with SMTP id o207-20020a1ca5d8000000b0038977354e75so2010104wme.1 for ; Sun, 06 Mar 2022 03:04:01 -0800 (PST) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=x-gm-message-state:from:to:cc:subject:in-reply-to:references:date :message-id:mime-version; bh=SqbiZzv4Jh6+DQqrPRGzXQQ0/kRA1zZUTyKBjx3NUmo=; b=RPgGZA2i9XR0kGRrSNF3vwL8biWFCM2VzvBQNP3tLxZphIsJb2LRFX5GreyomNQ891 2Xi/dWj9aws7ne0IxIDP6rCbaCpHdEw4xLSlvR2xPDxcCPy8E9bDtqdEVbqUvDjWHk2L ZC55ckhTbzdIZLW+V96xAIZTHIJ0y2r5yUJdLGOIPDt9uElxIDml9uuW8BILo9dL7tey mwsQJfztz7uvNPclcVQbDXMZlldpAIcnvHBWtMuZEWOOhlILjukysPKK9zowAEqM66EM P0ajBryoMcicgVjyxDMMqvcUPW/rhNO2ckCGx0nxB7drDauUQE1rAQH8BGWVxc9W9UwW x6/w== X-Gm-Message-State: AOAM530eV8DL+UvVP6ZbG8qIxoi5s1bdz6Hw/NLFWvUEQH7JcQMoGn4i zP5RLm8uqH6DNOB9/5NhnimOBpG7TNnqrUuF4jvJWGwuzai0HQhWtDbfqqZTDI2MxB6bY363YxM JT4ul/an8twoQ12k= X-Received: by 2002:a5d:5850:0:b0:1f0:2d5b:dc35 with SMTP id i16-20020a5d5850000000b001f02d5bdc35mr4865706wrf.344.1646564640587; Sun, 06 Mar 2022 03:04:00 -0800 (PST) X-Google-Smtp-Source: ABdhPJx/hHPXLG2GWOGCQmLVhkb9+BYoURpIFHdksDAyPGyo9O9UAYUJwnasAdUE43+BndqWNl9ogA== X-Received: by 2002:a5d:5850:0:b0:1f0:2d5b:dc35 with SMTP id i16-20020a5d5850000000b001f02d5bdc35mr4865695wrf.344.1646564640346; Sun, 06 Mar 2022 03:04:00 -0800 (PST) Received: from fedora (ec2-3-80-233-239.compute-1.amazonaws.com. [3.80.233.239]) by smtp.gmail.com with ESMTPSA id i4-20020a05600c354400b003899f5a8195sm1891782wmq.32.2022.03.06.03.03.57 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sun, 06 Mar 2022 03:03:59 -0800 (PST) From: Vitaly Kuznetsov To: Paolo Bonzini Subject: Re: [PATCH v2 0/3] i386: Add support for Hyper-V Enlightened MSR-Bitmap and XMM fast hypercall input features In-Reply-To: <20220217142949.297454-1-vkuznets@redhat.com> References: <20220217142949.297454-1-vkuznets@redhat.com> Date: Sun, 06 Mar 2022 12:03:55 +0100 Message-ID: <8735jvbaw4.fsf@redhat.com> MIME-Version: 1.0 Authentication-Results: relay.mimecast.com; auth=pass smtp.auth=CUSA124A263 smtp.mailfrom=vkuznets@redhat.com X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: redhat.com Content-Type: text/plain Received-SPF: pass client-ip=170.10.133.124; envelope-from=vkuznets@redhat.com; helo=us-smtp-delivery-124.mimecast.com X-Spam_score_int: -21 X-Spam_score: -2.2 X-Spam_bar: -- X-Spam_report: (-2.2 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-0.082, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_NONE=-0.0001, RCVD_IN_MSPIKE_H5=0.001, RCVD_IN_MSPIKE_WL=0.001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001, T_SCC_BODY_TEXT_LINE=-0.01 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Marcelo Tosatti , qemu-devel@nongnu.org Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" Vitaly Kuznetsov writes: > 'XMM fast hypercall input feature' is supported by KVM since v5.14, > it allows for faster Hyper-V hypercall processing. > > 'Enlightened MSR-Bitmap' is a new nested specific enlightenment speeds up > L2 vmexits by avoiding unnecessary updates to L2 MSR-Bitmap. KVM support > for the feature on Intel CPUs is coming in v5.17 and is queued for 5.18 for > AMD CPUs. > Gentle ping) It seems the time is running out to get this in 7.0... -- Vitaly