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Re: VW ELF loader
From: |
Paolo Bonzini |
Subject: |
Re: VW ELF loader |
Date: |
Mon, 10 Feb 2020 12:25:39 +0100 |
User-agent: |
Mozilla/5.0 (X11; Linux x86_64; rv:68.0) Gecko/20100101 Thunderbird/68.1.1 |
On 10/02/20 08:30, David Gibson wrote:
>> 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.
Part that, part having to add backend hooks that weren't needed so far.
>> 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"?
Alexey's question was "what is exactly the benefit", so "not doing a
different thing" is the answer (one of them).
>> 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.
PAPR is a specification for the environment as seen by the OS. But "-M
pseries" is already a defined hardware environment on which SLOF is
running. There's nothing that prevents you from defining more of that
environment in order to run Linux (for petitboot) or your own
pseudo-OpenFirmware driver provider inside it.
Paolo
- Re: Restrictions of libnet (was: Re: VW ELF loader), (continued)
- Re: Restrictions of libnet (was: Re: VW ELF loader), David Gibson, 2020/02/12
- Re: VW ELF loader, Alexey Kardashevskiy, 2020/02/04
- Re: VW ELF loader, David Gibson, 2020/02/05
- Re: VW ELF loader, Cornelia Huck, 2020/02/05
- Re: VW ELF loader, David Gibson, 2020/02/05
- Re: VW ELF loader, Paolo Bonzini, 2020/02/06
- Re: VW ELF loader, Alexey Kardashevskiy, 2020/02/06
- Re: VW ELF loader, Paolo Bonzini, 2020/02/06
- Re: VW ELF loader, David Gibson, 2020/02/10
- Re: VW ELF loader, Peter Maydell, 2020/02/10
- Re: VW ELF loader,
Paolo Bonzini <=
- Re: VW ELF loader, David Gibson, 2020/02/13
- Re: VW ELF loader, David Gibson, 2020/02/10
- Re: VW ELF loader, Paolo Bonzini, 2020/02/10
- Re: VW ELF loader, David Gibson, 2020/02/13
- Re: VW ELF loader, David Gibson, 2020/02/05
- Re: VW ELF loader, Paolo Bonzini, 2020/02/06
- Re: VW ELF loader, Alexey Kardashevskiy, 2020/02/06
- Re: VW ELF loader, Paolo Bonzini, 2020/02/06
- Re: VW ELF loader, Alexey Kardashevskiy, 2020/02/09
- Re: VW ELF loader, Alexey Kardashevskiy, 2020/02/12