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Re: [Xen-devel] [RFC PATCH v2 13/22] xen/arm: its: Add virtual ITS command support
- To: Manish Jaggi <mjaggi@xxxxxxxxxxxxxxxxxx>, Julien Grall <julien.grall@xxxxxxxxxx>, Vijay Kilari <vijay.kilari@xxxxxxxxx>
- From: Julien Grall <julien.grall@xxxxxxxxxx>
- Date: Wed, 29 Apr 2015 13:21:11 +0100
- Cc: Ian Campbell <ian.campbell@xxxxxxxxxx>, Stefano Stabellini <stefano.stabellini@xxxxxxxxxxxxx>, Prasun Kapoor <Prasun.Kapoor@xxxxxxxxxxxxxxxxxx>, Vijaya Kumar K <vijaya.kumar@xxxxxxxxxxxxxxxxxx>, Julien Grall <julien.grall@xxxxxxxxxx>, Tim Deegan <tim@xxxxxxx>, "xen-devel@xxxxxxxxxxxxx" <xen-devel@xxxxxxxxxxxxx>, Stefano Stabellini <stefano.stabellini@xxxxxxxxxx>, manish.jaggi@xxxxxxxxxxxxxxxxxx
- Delivery-date: Wed, 29 Apr 2015 12:22:08 +0000
- List-id: Xen developer discussion <xen-devel.lists.xen.org>
On 29/04/15 13:12, Manish Jaggi wrote:
>>> and that too
>>> ITS is not in critical path.
>>> It is only used when configuring interrupts of the device?
>> You need to think about security... Even though the ITS should only be
>> used for configuring interrupts, a malicious guest could try to exploit
>> weakness in the emulation.
> Can you describe the scenario ?
I already wrote several times the possible security impacts of the
polling solution... Please read again the previous mails.
Regards,
--
Julien Grall
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