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Re: [Qemu-devel] Re: qdev property bug?
From: |
Michael S. Tsirkin |
Subject: |
Re: [Qemu-devel] Re: qdev property bug? |
Date: |
Mon, 14 Dec 2009 22:20:20 +0200 |
User-agent: |
Mutt/1.5.19 (2009-01-05) |
On Mon, Dec 14, 2009 at 01:59:47PM -0600, Anthony Liguori wrote:
> Michael S. Tsirkin wrote:
>> At some level this is wrong. ROM presence is a hardware feature and you
>> definitely need to select your hardware when you create a VM. For real
>> hardware, cards with PXE are sometimes more expensive than without as
>> they need ROM memory. People do select hardware based on this.
>>
>> Even when PXE is present in hardware, most BIOS
>> vendors will let you turn it on/off optionally,
>> for security if not for other reasons.
>>
>> What the default should be depends on whether the
>> majority of our users use PXE. I guess not,
>> and if I am right default should be off.
>>
>
> The real way to pose this question is, what is the impact to users by
> keeping this on to those that don't use it vs. the cost of turning it
> off by default for users that do need it.
>
> So far, it's not clear to me that anyone has demonstrated how this is
> harmful for people that don't want pxe booting. Assuming we fix the bug
> about rom loading, then there's really no impact to users.
>
> Regards,
>
> Anthony Liguori
PXE booting might have security impact. You do not want to
do this if you are on a hostile network.
--
MST
- Re: [Qemu-devel] Re: qdev property bug?, (continued)
- Re: [Qemu-devel] Re: qdev property bug?, Michael S. Tsirkin, 2009/12/14
- Re: [Qemu-devel] Re: qdev property bug?, Michael S. Tsirkin, 2009/12/14
- Re: [Qemu-devel] Re: qdev property bug?, Anthony Liguori, 2009/12/14
- Re: [Qemu-devel] Re: qdev property bug?, Michael S. Tsirkin, 2009/12/14
- Re: [Qemu-devel] Re: qdev property bug?, Sebastian Herbszt, 2009/12/14
- Re: [Qemu-devel] Re: qdev property bug?, Michael S. Tsirkin, 2009/12/14
- Re: [Qemu-devel] Re: qdev property bug?, Sebastian Herbszt, 2009/12/14
- Re: [Qemu-devel] Re: qdev property bug?, Anthony Liguori, 2009/12/14
- Re: [Qemu-devel] Re: qdev property bug?, Michael S. Tsirkin, 2009/12/14
- Re: [Qemu-devel] Re: qdev property bug?, Anthony Liguori, 2009/12/14
- Re: [Qemu-devel] Re: qdev property bug?,
Michael S. Tsirkin <=
- Re: [Qemu-devel] Re: qdev property bug?, Gerd Hoffmann, 2009/12/14
- Re: [Qemu-devel] Re: qdev property bug?, Michael S. Tsirkin, 2009/12/14
- Re: [Qemu-devel] Re: qdev property bug?, Michael S. Tsirkin, 2009/12/14
- Re: [Qemu-devel] Re: qdev property bug?, Anthony Liguori, 2009/12/14
- Re: [Qemu-devel] Re: qdev property bug?, Michael S. Tsirkin, 2009/12/14
- Proper support for PCI-based option rom loading (was Re: [Qemu-devel] Re: qdev property bug?), Anthony Liguori, 2009/12/14
- Re: Proper support for PCI-based option rom loading (was Re: [Qemu-devel] Re: qdev property bug?), Kevin O'Connor, 2009/12/14
- Re: Proper support for PCI-based option rom loading (was Re: [Qemu-devel] Re: qdev property bug?), Kevin O'Connor, 2009/12/14
- Re: Proper support for PCI-based option rom loading (was Re: [Qemu-devel] Re: qdev property bug?), Anthony Liguori, 2009/12/15
- Re: Proper support for PCI-based option rom loading (was Re: [Qemu-devel] Re: qdev property bug?), Anthony Liguori, 2009/12/15