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List:       qubes-devel
Subject:    Re: [qubes-devel] CoreBoot + Qubes on thinkpad x230
From:       Joanna Rutkowska <joanna () invisiblethingslab ! com>
Date:       2016-07-25 9:11:07
Message-ID: 20160725091106.GA20002 () work-mutt
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On Sun, Jul 24, 2016 at 12:15:54PM -0600, Trammell Hudson wrote:
> On Sun, Jul 24, 2016 at 11:47:53AM -0600, Trammell Hudson wrote:
> > I reported on twitter that my Thinkpad x230 with a recent build of
> > coreboot (from git head) appears to support DMAR and the IOMMU is
> > configured with Qubes 3.1. [...]
> 
> Here is the Xen dmesg and xl info output, which Johanna had requested:
> 
(...)

Hi, thanks for sharing.

After a quick grep through the commits, it seems like the DMAR was already there
since Oct 2015, but was broken for many platforms until this commit from March:

https://github.com/coreboot/coreboot/commit/f3f654ddb90fedfb72eab99db6f9893e898ffbff

Also, a quick grep inside src/northbridge/intel suggests coreboot implements
DMAR only for sandybridge/ivebridge platforms. Are there any plans to change
that anytime soon? CCing coreboot ML.

One question out of curiosity: how did you verify the authenticity/integrity of
your coreboot clone? I just cloned the repo also, but I see 1) no signed tags,
nor 2) signed commits?

Thanks,
joanna.
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