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 45500EE4996 for ; Mon, 21 Aug 2023 09:35:37 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230465AbjHUJfg (ORCPT ); Mon, 21 Aug 2023 05:35:36 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:58136 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S234421AbjHUJf2 (ORCPT ); Mon, 21 Aug 2023 05:35:28 -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 ESMTPS id EFD37CE for ; Mon, 21 Aug 2023 02:34:39 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1692610479; h=from:from:reply-to: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=9McAmfa26fnzkn4wkMS9Leiv/n/uMWhGX6XenuhYcak=; b=hcuv2p/Pzkv5x2ykWQnDtyhduGikRkbQwaKhG6FbsbrwCspV6ID2Yt4qPPlYx4tsk9sBPs WEtGUUp1rSaxxZfe06FynnErz0w/az3f/arE9oaM9cOde/yVQD4nj1RWYJeuMq56weWFN9 rdAgpzsYGslx/3eaRELY3rHHjdl5iX8= Received: from mimecast-mx02.redhat.com (mimecast-mx02.redhat.com [66.187.233.88]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id us-mta-594-PQPqsmjEMfCbLOPph2B-9g-1; Mon, 21 Aug 2023 05:34:34 -0400 X-MC-Unique: PQPqsmjEMfCbLOPph2B-9g-1 Received: from smtp.corp.redhat.com (int-mx10.intmail.prod.int.rdu2.redhat.com [10.11.54.10]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx02.redhat.com (Postfix) with ESMTPS id 0BEF8856F67; Mon, 21 Aug 2023 09:34:34 +0000 (UTC) Received: from redhat.com (unknown [10.42.28.139]) by smtp.corp.redhat.com (Postfix) with ESMTPS id 7D6494A9004; Mon, 21 Aug 2023 09:34:31 +0000 (UTC) Date: Mon, 21 Aug 2023 10:34:29 +0100 From: Daniel =?utf-8?B?UC4gQmVycmFuZ8Op?= To: Xiaoyao Li Cc: Paolo Bonzini , Richard Henderson , "Michael S. Tsirkin" , Marcel Apfelbaum , Igor Mammedov , Ani Sinha , Peter Xu , David Hildenbrand , Philippe =?utf-8?Q?Mathieu-Daud=C3=A9?= , Cornelia Huck , Eric Blake , Markus Armbruster , Marcelo Tosatti , Gerd Hoffmann , qemu-devel@nongnu.org, kvm@vger.kernel.org, Eduardo Habkost , Laszlo Ersek , Isaku Yamahata , erdemaktas@google.com, Chenyi Qiang Subject: Re: [PATCH v2 25/58] kvm/tdx: Don't complain when converting vMMIO region to shared Message-ID: Reply-To: Daniel =?utf-8?B?UC4gQmVycmFuZ8Op?= References: <20230818095041.1973309-1-xiaoyao.li@intel.com> <20230818095041.1973309-26-xiaoyao.li@intel.com> MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Disposition: inline In-Reply-To: <20230818095041.1973309-26-xiaoyao.li@intel.com> User-Agent: Mutt/2.2.9 (2022-11-12) X-Scanned-By: MIMEDefang 3.1 on 10.11.54.10 Precedence: bulk List-ID: X-Mailing-List: kvm@vger.kernel.org On Fri, Aug 18, 2023 at 05:50:08AM -0400, Xiaoyao Li wrote: > From: Isaku Yamahata > > Because vMMIO region needs to be shared region, guest TD may explicitly > convert such region from private to shared. Don't complain such > conversion. > > Signed-off-by: Isaku Yamahata > Signed-off-by: Xiaoyao Li > --- > accel/kvm/kvm-all.c | 20 ++++++++++++++++++-- > 1 file changed, 18 insertions(+), 2 deletions(-) > > diff --git a/accel/kvm/kvm-all.c b/accel/kvm/kvm-all.c > index fceec7f2a83f..9d0aa8c97feb 100644 > --- a/accel/kvm/kvm-all.c > +++ b/accel/kvm/kvm-all.c > @@ -3094,8 +3094,24 @@ static int kvm_convert_memory(hwaddr start, hwaddr size, bool to_private) > */ > ram_block_convert_range(rb, offset, size, to_private); > } else { > - warn_report("Convert non guest-memfd backed memory region (0x%"HWADDR_PRIx" ,+ 0x%"HWADDR_PRIx") to %s", > - start, size, to_private ? "private" : "shared"); > + MemoryRegion *mr = section.mr; > + > + /* > + * Because vMMIO region must be shared, guest TD may convert vMMIO > + * region to shared explicitly. Don't complain such case. See > + * memory_region_type() for checking if the region is MMIO region. > + */ > + if (to_private || > + memory_region_is_ram(mr) || > + memory_region_is_ram_device(mr) || > + memory_region_is_rom(mr) || > + memory_region_is_romd(mr)) { Should we also have !is_tdx_vm() as the first clause to check, as IIUC you only need the special logic for TDX VMs. > + warn_report("Convert non guest-memfd backed memory region (0x%"HWADDR_PRIx" ,+ 0x%"HWADDR_PRIx") of %s to %s", > + start, size, mr->name, to_private ? "private" : "shared"); > + } else { > + ret = 0; > + } Inconsistent indentation here due to use of tabs > + > } > > memory_region_unref(section.mr); > -- > 2.34.1 > With regards, Daniel -- |: https://berrange.com -o- https://www.flickr.com/photos/dberrange :| |: https://libvirt.org -o- https://fstop138.berrange.com :| |: https://entangle-photo.org -o- https://www.instagram.com/dberrange :|