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=-6.0 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS 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 2C5DCC49360 for ; Mon, 14 Jun 2021 07:48:09 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 0C2D66124B for ; Mon, 14 Jun 2021 07:48:09 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232509AbhFNHuJ (ORCPT ); Mon, 14 Jun 2021 03:50:09 -0400 Received: from us-smtp-delivery-124.mimecast.com ([170.10.133.124]:46569 "EHLO us-smtp-delivery-124.mimecast.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232492AbhFNHuG (ORCPT ); Mon, 14 Jun 2021 03:50:06 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1623656883; 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=uVVQDAqE2mNu93zrjVnb7Wt06L1/09jtCkVYdV1XAfc=; b=YkWQLAGs4500hMYddsrdqMOqX2wgsZO1Qbz7DTWm7u7/0mrEdXZ7NKBrFzhdX3isi5JD7r uA1TKyZSpVPbfl66vUu8xMvW51gpYiLdI2xwpWC2leibv5I+oRUkZcvyPRaqbC089mnVlR 5dYYkepuyC1YAnLj9rRvXXsJAcGZJfo= Received: from mail-ed1-f69.google.com (mail-ed1-f69.google.com [209.85.208.69]) (Using TLS) by relay.mimecast.com with ESMTP id us-mta-460-PYEspA8oMfSNlmzn4T1dkw-1; Mon, 14 Jun 2021 03:48:02 -0400 X-MC-Unique: PYEspA8oMfSNlmzn4T1dkw-1 Received: by mail-ed1-f69.google.com with SMTP id x8-20020aa7d3880000b029038fe468f5f4so19666091edq.10 for ; Mon, 14 Jun 2021 00:48:02 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:in-reply-to:references:date :message-id:mime-version; bh=uVVQDAqE2mNu93zrjVnb7Wt06L1/09jtCkVYdV1XAfc=; b=UbbSCsn2UjWPLCKOB0urZZ+UmbAbhGSp9NYgm/pehHjkv/o/a1pYIeIAfhnIxjS5Oh gJh1dZLEdNYHJjAizrbCHy/j/iTOecs0Lr2hKm+s8WfAWcgGthpnnGFLb186N/XORT35 UMXWtD6KME73bFE8Z4E86xIpy9i+dEmyFB8cklNtEik3WMYyFPqBqgalxFXB8vcA0tKi ul3QEyq+MO8k9KIsdyT44IJ1TURK+UWV29qHieSWHquZQkyPBLnw6eSsaajZ+fEgcHD6 vZfGOPqfhwBosmLVyLH/FEcutYroEe1qPDmiA0iHoEZUKdrpxiLRpeO4Uhespo1LQydb HX5A== X-Gm-Message-State: AOAM530v7Nzv7DPmZ2Fm6R0CRsVt/IEtxxFRlbq5gc38OGzyhc41HxbT SnbvDgR0g2GV3Ej3u19OgMDl2winNW/xxMiCUw5CVwYMX3+AnQoFPL3MnaXZFQkTCZ0KeaCnqZO 8v1bDS4ZjWKRA+Poubxplhqtg X-Received: by 2002:aa7:cb19:: with SMTP id s25mr15927086edt.194.1623656881435; Mon, 14 Jun 2021 00:48:01 -0700 (PDT) X-Google-Smtp-Source: ABdhPJzR5ViPXNZ/W1P6S7MeGqL1karb6GMvkiVX7a6Cj3XRWtU7Ght+0fiIaUQS7VaSMZPx0qyfEA== X-Received: by 2002:aa7:cb19:: with SMTP id s25mr15927063edt.194.1623656881266; Mon, 14 Jun 2021 00:48:01 -0700 (PDT) Received: from vitty.brq.redhat.com (g-server-2.ign.cz. [91.219.240.2]) by smtp.gmail.com with ESMTPSA id h8sm6839060ejj.22.2021.06.14.00.47.59 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 14 Jun 2021 00:48:00 -0700 (PDT) From: Vitaly Kuznetsov To: Paolo Bonzini Cc: "H. Peter Anvin" , Thomas Gleixner , Ingo Molnar , Borislav Petkov , "K. Y. Srinivasan" , x86@kernel.org, kvm@vger.kernel.org, linux-kernel@vger.kernel.org, linux-hyperv@vger.kernel.org, Maxim Levitsky , Vineeth Pillai , Lan Tianyu , Michael Kelley , Sean Christopherson , Tom Lendacky , Wanpeng Li , Jim Mattson , Joerg Roedel , Wei Liu , Stephen Hemminger , Haiyang Zhang Subject: Re: [PATCH v5 0/7] Hyper-V nested virt enlightenments for SVM In-Reply-To: <50dea657-ef03-4bde-b9c7-75d9e18157ea@redhat.com> References: <5af1ccce-a07d-5a13-107b-fc4c4553dd4d@redhat.com> <683fa50765b29f203cb4b0953542dc43226a7a2f.camel@redhat.com> <878s3gybuk.fsf@vitty.brq.redhat.com> <50dea657-ef03-4bde-b9c7-75d9e18157ea@redhat.com> Date: Mon, 14 Jun 2021 09:47:59 +0200 Message-ID: <87wnqwx4y8.fsf@vitty.brq.redhat.com> MIME-Version: 1.0 Content-Type: text/plain Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Paolo Bonzini writes: > CONFIG_HYPERV=m is possible. We've stubmled upon this multiple times already. Initially, the whole Hyper-V support code was a module (what's now in drivers/hv/) but then some core functionallity was moved out to arch/x86/ but we didn't add a new config back then. Still suffering :-) Ideally, we would want to have CONFIG_HYPERV_GUEST=y/n for what's in arch/x86/ (just like CONFIG_KVM_GUEST) CONFIG_HYPERV_VMBUS=y/n/m for what's in drivers/hv -- Vitaly