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 vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 4D989C433FE for ; Tue, 22 Mar 2022 10:13:05 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232802AbiCVKOb (ORCPT ); Tue, 22 Mar 2022 06:14:31 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:42638 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231845AbiCVKO2 (ORCPT ); Tue, 22 Mar 2022 06:14:28 -0400 Received: from us-smtp-delivery-124.mimecast.com (us-smtp-delivery-124.mimecast.com [170.10.133.124]) by lindbergh.monkeyblade.net (Postfix) with ESMTP id 51BA9119 for ; Tue, 22 Mar 2022 03:12:57 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1647943976; 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=YQp1gYLyNcExNlv89/UFFWzjc9zXJmAYUKrBW18aegE=; b=UDn0N7n7/lxQIRybk10EsLNFyMFOIEOWOcX4cN0mbpD7TxttEHsBijHpP1xp3/JZn7rdu3 ixpcxEn5mpDTM1wvos9PrpVdh4fI1UokIF+k/Vmo9GATKs90Ms/IXf1vnbJ6Kmxhok+S5x ko1NY7euY9sfGBZZi6L+Jd1aghP7yGE= Received: from mail-ed1-f70.google.com (mail-ed1-f70.google.com [209.85.208.70]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id us-mta-392-9iNIkC2aMhOrBejWVGcsbA-1; Tue, 22 Mar 2022 06:12:55 -0400 X-MC-Unique: 9iNIkC2aMhOrBejWVGcsbA-1 Received: by mail-ed1-f70.google.com with SMTP id v9-20020a509549000000b00418d7c2f62aso10247175eda.15 for ; Tue, 22 Mar 2022 03:12:55 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=x-gm-message-state:message-id:date:mime-version:user-agent:subject :content-language:to:cc:references:from:in-reply-to :content-transfer-encoding; bh=YQp1gYLyNcExNlv89/UFFWzjc9zXJmAYUKrBW18aegE=; b=BsUBEA9HgmKcNzRhCGr24sxZ4WYDLGPMGkZ2gvIdMx5v5NKAvD8ZJ2qQychdIG/QO8 VmS8q5mEKPIuyLC+4TGS4EhioHJIdFFP0YyPyQCdbJEhgYF+IP/8Ej3UeNegxZZ/YP5e b7LTeSsgoQRGZtBOgm7FdQkbK4KlM6TE7g1oXczaAgS3C/gnhT+PksuRaTx0kTkT60vc iHhI+Xz+6tSO6shLTwzulkPYRuzZs1TeQWW46U7yZ6+YWTQSlVDFp8AXPzut4JtCH/RL iSFUKdqFm4xGkWgGQUdJNJevZCuKjy0AY5ATSBYTr4Yyt9klKbD842LxTWRZfrWDjqjf PwIA== X-Gm-Message-State: AOAM530PNWrZ8vz+q9VLW7fGNi4XvyjSH7yrgXiXXbKsuQ9THLi5cKdB vsjJASqDqeRDUqjHCWCIshwFGGQW9L6VQ10wtRyy3gEOJP5/eFFFpA68nj+h8vSdAdOq4wTABy4 noeBZXd2I39mo6Pzg0Uz1pm5Z X-Received: by 2002:a17:907:7815:b0:6ce:5242:1280 with SMTP id la21-20020a170907781500b006ce52421280mr25061538ejc.217.1647943974083; Tue, 22 Mar 2022 03:12:54 -0700 (PDT) X-Google-Smtp-Source: ABdhPJxDBB9tGmtD3a23htpdMy5Uitfw5FvxbGEfQJ0gNsoD+jzGxh0echsqZesil7pTtNq0t5Cnhw== X-Received: by 2002:a17:907:7815:b0:6ce:5242:1280 with SMTP id la21-20020a170907781500b006ce52421280mr25061522ejc.217.1647943973849; Tue, 22 Mar 2022 03:12:53 -0700 (PDT) Received: from ?IPV6:2001:b07:6468:f312:c8dd:75d4:99ab:290a? ([2001:b07:6468:f312:c8dd:75d4:99ab:290a]) by smtp.googlemail.com with ESMTPSA id d2-20020a50cf42000000b004135b6eef60sm9356472edk.94.2022.03.22.03.12.52 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Tue, 22 Mar 2022 03:12:53 -0700 (PDT) Message-ID: Date: Tue, 22 Mar 2022 11:12:51 +0100 MIME-Version: 1.0 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:91.0) Gecko/20100101 Thunderbird/91.4.0 Subject: Re: [PATCH v3 4/7] KVM: x86: nSVM: support PAUSE filter threshold and count when cpu_pm=on Content-Language: en-US To: Jim Mattson , Maxim Levitsky Cc: kvm@vger.kernel.org, Ingo Molnar , Dave Hansen , Sean Christopherson , Borislav Petkov , "H. Peter Anvin" , Thomas Gleixner , x86@kernel.org, Vitaly Kuznetsov , Joerg Roedel , linux-kernel@vger.kernel.org, Wanpeng Li References: <20220301143650.143749-1-mlevitsk@redhat.com> <20220301143650.143749-5-mlevitsk@redhat.com> <6a7f13d1-ed00-b4a6-c39b-dd8ba189d639@redhat.com> <8071f0f0a857b0775f1fb2d1ebd86ffc4fd9096b.camel@redhat.com> From: Paolo Bonzini In-Reply-To: Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 3/21/22 23:41, Jim Mattson wrote: >> 100%. Do you have a pointer where to document it? > I think this will be the first KVM virtual CPU erratum documented, > though there are plenty of others that I'd like to see documented > (e.g. nVMX processes posted interrupts on emulated VM-entry, AMD's > merged PMU counters are only 48 bits wide, etc.). > > Maybe Paolo has some ideas? So let's document them, that's a great idea. I can help writing them down if you have a pointer to prior email discussions. I'll send a skeleton. Paolo