From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([2001:4830:134:3::10]:40789) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1fQvYx-0006YX-17 for qemu-devel@nongnu.org; Thu, 07 Jun 2018 10:06:56 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1fQvYr-00045Y-5n for qemu-devel@nongnu.org; Thu, 07 Jun 2018 10:06:51 -0400 Message-ID: <63fece55c4708744d9289fedf42d67ebb1bccbdd.camel@redhat.com> From: Andrea Bolognani Date: Thu, 07 Jun 2018 16:06:34 +0200 In-Reply-To: <20180607134953.GN2522@work-vm> References: <61a301dd-8e50-8799-8328-341d6ab744f5@redhat.com> <20180606143134.GG2660@work-vm> <39bcee27-329a-61d8-47fa-678b431b0a79@redhat.com> <20180606150507.GJ2660@work-vm> <66727986-1cf1-c12e-d78c-d56cc15eaf00@redhat.com> <20180606163246.GL3064@redhat.com> <20180607102257.GH28827@redhat.com> <2afb9305deb37c8ca4f930235eaf52486ab0153e.camel@redhat.com> <20180607123847.GL28827@redhat.com> <20180607134953.GN2522@work-vm> Content-Type: text/plain; charset="UTF-8" Mime-Version: 1.0 Content-Transfer-Encoding: 7bit Subject: Re: [Qemu-devel] storing machine data in qcow images? List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: "Dr. David Alan Gilbert" , "Daniel P. =?ISO-8859-1?Q?Berrang=E9?=" Cc: Eric Blake , Kevin Wolf , qemu-block@nongnu.org, "Michael S. Tsirkin" , qemu-devel@nongnu.org, armbru@redhat.com, "Richard W.M. Jones" , stefanha@redhat.com, Max Reitz On Thu, 2018-06-07 at 14:49 +0100, Dr. David Alan Gilbert wrote: > Including the nvram and efi makes me nervous; but I can see why together > they might work. However, there's no guarantee that EFI has been tested > with the QEMU it's used on and ... that could be trouble. If the QEMU binary doesn't support EFI, then a guest expecting EFI won't be able to start regardless of where the EFI ROM came from. > Also, if we're going to start including the EFI rom then that would have > to be migrated with the VM so that after a restart on a different host > it's still using the right ROM that's compatible with it's varfile. That's a problem that needs to be addressed anyway, because even as it is now you could easily find yourself trying and failing to migrate a guest between two hosts that have different and incompatible EFI ROMs installed. -- Andrea Bolognani / Red Hat / Virtualization