Re: VW ELF loader

[David Gibson <david@gibson.dropbear.id.au>]

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On Fri, Feb 07, 2020 at 12:45:20AM +0100, Paolo Bonzini wrote:
> On 07/02/20 00:17, Alexey Kardashevskiy wrote:
> > This is a lot and what is exactly the benefit? My alternative does not
> > need drivers at all.
> 
> Anything you put in the host is potential attack surface.

Ok, it is attack surface you're concerned about.  That wasn't totally
clear before this point.

> Plus, you're
> not doing a different thing than anyone else and as you've found out it
> may be easy for block device but not for everything else.

Uh.. was that supposed to be "we *are* doing a different thing than
anyone else"?

> Every platform that QEMU supports is just using a firmware to do
> firmware things; it can be U-Boot, EDK-2, SLOF, SeaBIOS, qboot, with
> varying level of complexity.  Some are doing -kernel in QEMU rather than
> firmware, but that's where things end.

Well, yeah, but AIUI those platforms actually have a defined hardware
environment on which the firmware is running.  For PAPR we don't, we
*only* have a specification for the "hardware"+"firmware" environment
as seen by the OS together.

-- 
David Gibson			| I'll have my music baroque, and my code
david AT gibson.dropbear.id.au	| minimalist, thank you.  NOT _the_ _other_
				| _way_ _around_!
http://www.ozlabs.org/~dgibson

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