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Re: [Qemu-devel] [RFC PATCH v1 20/22] fw_cfg: sev: disable dma in real m


From: Brijesh Singh
Subject: Re: [Qemu-devel] [RFC PATCH v1 20/22] fw_cfg: sev: disable dma in real mode
Date: Wed, 21 Sep 2016 13:19:25 -0500
User-agent: Mozilla/5.0 (X11; Linux x86_64; rv:45.0) Gecko/20100101 Thunderbird/45.2.0

Hi Michael,


Again it isn't clear how much value does attestation have,
we are assuming arbitrary restrictions on the attacker such
as inability to trigger exits at random times, why not
assume it can't attack guest during boot?
IOW it seems reasonable to just ignore the need for attestation
completely as the first step.
Get the other stuff merged first.


Thanks for feedbacks. In v2, I will try to remove the attestation code and we can revisit it later.

-Brijesh



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