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=-2.4 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI, 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 5E50EC433E0 for ; Thu, 21 May 2020 14:08:38 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 3C7FB20748 for ; Thu, 21 May 2020 14:08:38 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=redhat.com header.i=@redhat.com header.b="WxnF8KBG" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1729843AbgEUOIe (ORCPT ); Thu, 21 May 2020 10:08:34 -0400 Received: from us-smtp-delivery-1.mimecast.com ([205.139.110.120]:56614 "EHLO us-smtp-1.mimecast.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1729810AbgEUOId (ORCPT ); Thu, 21 May 2020 10:08:33 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1590070112; 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=KYPruZ8qzCyc8Zuc6WzgrqHrImI6iIZQ3tFwxDcY6eQ=; b=WxnF8KBGBcrKr+ZP6/55jsOICaV7MSdgVrywBtIxXkd6Oe/HNj8SFmz9LR3ViZqXevgyTq A11iXGIEroZTTMmv8836AR0rCqLXhuW58baccSjgwXd6D7MsTQ9GbOEW6//fQZ//iejB19 ZG62JpwXU65TRPd/o+7HsYK6kic4gbE= Received: from mail-wr1-f69.google.com (mail-wr1-f69.google.com [209.85.221.69]) (Using TLS) by relay.mimecast.com with ESMTP id us-mta-266-Y2ams0TDMiqCMfuuWMzfbA-1; Thu, 21 May 2020 10:08:22 -0400 X-MC-Unique: Y2ams0TDMiqCMfuuWMzfbA-1 Received: by mail-wr1-f69.google.com with SMTP id z8so2961384wrp.7 for ; Thu, 21 May 2020 07:08:22 -0700 (PDT) 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=KYPruZ8qzCyc8Zuc6WzgrqHrImI6iIZQ3tFwxDcY6eQ=; b=MqrqD+MFj9KTPfqhP9yVhiF7Mk3YSsU6SNFUwSqERNuw1g5AyFAyzQzvShHsbwDVcP gKnB9wFmYDE4bcMjvrBC8hwXJMV8V9tNatFslSqWUUJv+OWi/9pIA9KXPrlLahDociKy C2mpfi9D+DxlC0ZvawqMkTxwkbP9TLNzfoGyM7zCh88ZaI1ner3sRExdjUHwY8B7PzKF vwbExj9Fj5EAQ9oqhuM9ciQhaL/dE3SiP7r7hQfFJm6pGbdvqbpiP9jUTAedQjY+OTRc XDdXkAQfToskYjZiSmxsUMvsqYkgWgPamL1PYwI1tCewVH8nHqP/I+ZG4F7zM04CE4Ao IC1w== X-Gm-Message-State: AOAM531N+0a8IohpUcAuI0HYXKEjf93zC2zPLx/zEGJLFTGitIdFNHmd jhJ2vAhnvqN0u93HMFrwf6MBv2NPNsOeFJCjGcB0ubCfvSPWua5SPNl5qZbee3hP8C9j+FdB51Z DafZHEdlA3Ly4 X-Received: by 2002:a1c:7c0b:: with SMTP id x11mr9419091wmc.149.1590070101175; Thu, 21 May 2020 07:08:21 -0700 (PDT) X-Google-Smtp-Source: ABdhPJxeqE8s6kqITQ5zRCGAR7thbTgJ+XBuN/t8JKtVxsAPKAeoBu546k0CmcwDaZnB6+qd45/Ykw== X-Received: by 2002:a1c:7c0b:: with SMTP id x11mr9419073wmc.149.1590070100967; Thu, 21 May 2020 07:08:20 -0700 (PDT) Received: from [192.168.178.58] ([151.30.94.134]) by smtp.gmail.com with ESMTPSA id q144sm7012698wme.0.2020.05.21.07.08.20 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Thu, 21 May 2020 07:08:20 -0700 (PDT) Subject: Re: [PATCH v2 03/22] KVM: SVM: immediately inject INTR vmexit To: Vitaly Kuznetsov Cc: wei.huang2@amd.com, cavery@redhat.com, Sean Christopherson , Oliver Upton , Jim Mattson , linux-kernel@vger.kernel.org, kvm@vger.kernel.org References: <20200424172416.243870-1-pbonzini@redhat.com> <20200424172416.243870-4-pbonzini@redhat.com> <87blmhsb7y.fsf@vitty.brq.redhat.com> From: Paolo Bonzini Message-ID: <8bc4c38a-1717-1e4f-b322-fdd51f614717@redhat.com> Date: Thu, 21 May 2020 16:08:19 +0200 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:68.0) Gecko/20100101 Thunderbird/68.6.0 MIME-Version: 1.0 In-Reply-To: <87blmhsb7y.fsf@vitty.brq.redhat.com> Content-Type: text/plain; charset=utf-8 Content-Language: en-US Content-Transfer-Encoding: 7bit Sender: kvm-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: kvm@vger.kernel.org On 21/05/20 14:50, Vitaly Kuznetsov wrote: > Sorry for reporting this late but I just found out that this commit > breaks Hyper-V 2016 on KVM on SVM completely (always hangs on boot). I > haven't investigated it yet (well, this is Windows, you know...) but > what's usually different about Hyper-V is that unlike KVM/Linux it has > handlers for some hardware interrupts in the guest and not in the > hypervisor. "Always hangs on boot" is easy. :) At this point I think it's easiest to debug it on top of the whole pending SVM patches that remove exit_required completely (and exit_required is not coming back anyway). Can you get a trace and send it to me? Paolo