From: Paolo Bonzini <pbonzini@redhat.com>
To: David Gibson <david@gibson.dropbear.id.au>
Cc: Thomas Huth <thuth@redhat.com>,
Alexey Kardashevskiy <aik@ozlabs.ru>,
qemu-devel <qemu-devel@nongnu.org>,
Cornelia Huck <conny@cornelia-huck.de>,
Christian Borntraeger <borntraeger@de.ibm.com>,
Stefano Garzarella <sgarzare@redhat.com>
Subject: Re: VW ELF loader
Date: Mon, 10 Feb 2020 12:25:39 +0100 [thread overview]
Message-ID: <c40f83a1-6dbd-7223-e825-0ab153a36aed@redhat.com> (raw)
In-Reply-To: <20200210073008.GE22584@umbus.fritz.box>
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
next prev parent reply other threads:[~2020-02-10 11:27 UTC|newest]
Thread overview: 48+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-02-01 13:39 VW ELF loader Alexey Kardashevskiy
2020-02-01 19:04 ` Paolo Bonzini
2020-02-02 11:51 ` Alexey Kardashevskiy
2020-02-02 17:38 ` Paolo Bonzini
2020-02-03 1:31 ` David Gibson
2020-02-03 1:28 ` David Gibson
2020-02-03 9:12 ` Paolo Bonzini
2020-02-03 9:50 ` David Gibson
2020-02-03 10:58 ` Alexey Kardashevskiy
2020-02-03 15:08 ` Paolo Bonzini
2020-02-03 22:36 ` Alexey Kardashevskiy
2020-02-03 22:56 ` Paolo Bonzini
2020-02-03 23:19 ` Alexey Kardashevskiy
2020-02-03 23:26 ` Paolo Bonzini
2020-02-04 6:16 ` Thomas Huth
2020-02-04 8:54 ` Cornelia Huck
2020-02-04 9:20 ` Restrictions of libnet (was: Re: VW ELF loader) Thomas Huth
2020-02-04 9:32 ` Thomas Huth
2020-02-04 9:33 ` Michal Suchánek
2020-02-05 5:30 ` David Gibson
2020-02-05 6:24 ` Thomas Huth
2020-02-10 7:55 ` David Gibson
2020-02-10 9:39 ` Michal Suchánek
2020-02-13 3:16 ` David Gibson
2020-02-04 23:18 ` VW ELF loader Alexey Kardashevskiy
2020-02-05 6:06 ` David Gibson
2020-02-05 9:28 ` Cornelia Huck
2020-02-06 4:47 ` David Gibson
2020-02-06 8:27 ` Paolo Bonzini
2020-02-06 23:17 ` Alexey Kardashevskiy
2020-02-06 23:45 ` Paolo Bonzini
2020-02-10 7:30 ` David Gibson
2020-02-10 10:37 ` Peter Maydell
2020-02-10 11:25 ` Paolo Bonzini [this message]
2020-02-14 3:23 ` David Gibson
2020-02-10 7:28 ` David Gibson
2020-02-10 11:26 ` Paolo Bonzini
2020-02-14 4:02 ` David Gibson
2020-02-05 5:58 ` David Gibson
2020-02-06 8:29 ` Paolo Bonzini
2020-02-06 23:23 ` Alexey Kardashevskiy
2020-02-06 23:46 ` Paolo Bonzini
2020-02-10 0:31 ` Alexey Kardashevskiy
2020-02-13 1:43 ` Alexey Kardashevskiy
2020-02-13 10:17 ` Paolo Bonzini
2020-02-14 0:01 ` Alexey Kardashevskiy
2020-02-14 2:30 ` David Gibson
2020-02-04 9:40 ` Christian Borntraeger
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