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=-8.0 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,NICE_REPLY_A,SPF_HELO_NONE,SPF_PASS,USER_AGENT_SANE_1 autolearn=no 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 19017C433E0 for ; Wed, 3 Feb 2021 08:00:18 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id B33E864F65 for ; Wed, 3 Feb 2021 08:00:17 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232007AbhBCIAQ (ORCPT ); Wed, 3 Feb 2021 03:00:16 -0500 Received: from us-smtp-delivery-124.mimecast.com ([63.128.21.124]:26566 "EHLO us-smtp-delivery-124.mimecast.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231704AbhBCIAQ (ORCPT ); Wed, 3 Feb 2021 03:00:16 -0500 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1612339128; 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: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=Le4iuV0fc/jRHPu6t79f0QWPTHoOpEryhOXjwy8BhTY=; b=L00SfHNIiHrT9tw0Z5SEkeyQNgTHVprBzmVGjrWv7heMjRb+fQdiWdaQdpUy+fakDz0z1i y6gcI5nB2BaK7+k1uptwf5vnNEssCjRV1FJmDY38VAvszANAgM59pP0g0Z3GYzoDDwXkgI asUtwHVpdf6hKtvsBdg2K3exg6nZ5mY= Received: from mail-ed1-f71.google.com (mail-ed1-f71.google.com [209.85.208.71]) (Using TLS) by relay.mimecast.com with ESMTP id us-mta-56-QqafcvoAN3eKzpQYJggRQA-1; Wed, 03 Feb 2021 02:58:46 -0500 X-MC-Unique: QqafcvoAN3eKzpQYJggRQA-1 Received: by mail-ed1-f71.google.com with SMTP id u19so10990201edr.1 for ; Tue, 02 Feb 2021 23:58:46 -0800 (PST) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:subject:to:cc:references:from:message-id:date :user-agent:mime-version:in-reply-to:content-language :content-transfer-encoding; bh=Le4iuV0fc/jRHPu6t79f0QWPTHoOpEryhOXjwy8BhTY=; b=Juq7yLWERobfAJchaaD3W5X0RCv1lroh2qLWf+XDyotKZUBAB+mfVQfho3+RLEL/QQ 2xz/ql+steUrP+kmPi9yH8U3sD9C5TYwY/8VNNAcyJEzlsX94rlWhtfgNqjsxICdCLrD lZvKUk8qrQSzeHxgxm12fuHAzE2ai/E9tVKgdAp3fwcyrWwj+1cLpzonjYrLqHpEqUnI PwD6/gK9VSKrSkPftUOuyg039plI2NUefcCQXFV43dMeycFNw3uXb0mdXRXWXJ3emERt amVkeIbmTtKIFWRdi7wCj0Fw0BgDpQAjll3QmUqlMrFf6vAVTO1aKpUkTAQxGKjGP5ll KGFw== X-Gm-Message-State: AOAM532tuAw6OWjaquT+NxX2iDo7a/q+Sic4OMHGUilYzJwVUnm7NrEX KxEwA2DSBlPPGUagDTCeLYhYbA+WL2BYwveHFiIpIekFpMqu/TCvP5J3YB0bmSCa/rOeN/u0aPu pjbY3Y7Tob41T X-Received: by 2002:a50:85c4:: with SMTP id q4mr1758707edh.7.1612339125181; Tue, 02 Feb 2021 23:58:45 -0800 (PST) X-Google-Smtp-Source: ABdhPJyxqSe/aIV6dIfbUVUz74HMqp55I3lNhi5OrNIWNtt8xEda6IAGvtGzrH+zwwcWXss16JTlDw== X-Received: by 2002:a50:85c4:: with SMTP id q4mr1758695edh.7.1612339124995; Tue, 02 Feb 2021 23:58:44 -0800 (PST) Received: from ?IPv6:2001:b07:6468:f312:c8dd:75d4:99ab:290a? ([2001:b07:6468:f312:c8dd:75d4:99ab:290a]) by smtp.gmail.com with ESMTPSA id k3sm601608ejv.121.2021.02.02.23.58.43 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Tue, 02 Feb 2021 23:58:44 -0800 (PST) Subject: Re: Optimized clocksource with AMD AVIC enabled for Windows guest To: Kechen Lu , "kvm@vger.kernel.org" , "qemu-discuss@nongnu.org" Cc: "suravee.suthikulpanit@amd.com" , Somdutta Roy References: From: Paolo Bonzini Message-ID: <5688445c-b9c8-dbd6-e9ee-ed40df84f8ca@redhat.com> Date: Wed, 3 Feb 2021 08:58:43 +0100 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:78.0) Gecko/20100101 Thunderbird/78.6.0 MIME-Version: 1.0 In-Reply-To: Content-Type: text/plain; charset=utf-8; format=flowed Content-Language: en-US Content-Transfer-Encoding: 7bit Precedence: bulk List-ID: X-Mailing-List: kvm@vger.kernel.org On 03/02/21 07:40, Kechen Lu wrote: > From the above observations, trying to see if there's a way for > enabling AVIC while also having the most optimized clock source for > windows guest. > You would have to change KVM, so that AVIC is only disabled if Auto-EOI interrupts are used. Paolo