Re: [Xen-users] [Xen-devel] UEFI Secure Boot Xen 4.9

[Tamas K Lengyel <tamas.k.lengyel@xxxxxxxxx>]

On Mon, Sep 4, 2017 at 6:40 AM, Daniel Kiper <daniel.kiper@xxxxxxxxxx> wrote:
> On Wed, Aug 30, 2017 at 10:16:23AM -0600, Tamas K Lengyel wrote:
>> On Tue, Aug 29, 2017 at 2:01 PM, Daniel Kiper <daniel.kiper@xxxxxxxxxx> 
>> wrote:
>> > Hey Tamas,
>> >
>> > Sorry for late reply. I was on vacation.
>> >
>> > On Tue, Aug 22, 2017 at 09:01:06PM -0600, Tamas K Lengyel wrote:
>> >> On Tue, May 16, 2017 at 5:04 AM, Daniel Kiper <daniel.kiper@xxxxxxxxxx> 
>> >> wrote:
>> >
>> > [...]
>> >
>> >> > UEFI will verify shim secure boot signature then shim will verify GRUB2
>> >> > signature then GRUB2 will verify (with shim protocol) Xen signature and
>> >> > finally Xen will verify (with shim protocol) Linux kernel signature. 
>> >> > Then
>> >> > your kernel can verify modules using whatever you want.
>> >> >
>> >> >> I would be happy to work to help achieve this.
>> >> >
>> >> > There is a chance that I will have something very raw at the beginning
>> >> > of June. If you wish to do tests drop me a line.
>> >>
>> >> Hi Daniel,
>> >> is there any news on this? I would be interested in giving this a shot 
>> >> too.
>> >
>> > Please look at
>> >
>> >   https://lists.xen.org/archives/html/xen-devel/2017-07/msg00982.html
>> >
>> > and at
>> >
>> >   https://lists.xen.org/archives/html/xen-devel/2017-07/msg00985.html
>> >
>> > Attachments contain the same patches as above but rebased on latest
>> > GRUB2 and Xen git repositories.
>> >
>> > Due to some travel I am going to restart work on this in the second
>> > half of September.
>> >
>> > If you have any questions please drop me a line.
>> >
>>
>> Hi Daniel,
>> thanks for the update, I'll give it a shot today to set it up. In a
>> somewhat related note, are you aware of any work on getting secure
>> boot + UEFI working in a guest? There is a PoC patch on OpenXT
>> (https://github.com/OpenXT/xenclient-oe/pull/729) but was wondering if
>> there are any parallel efforts ongoing.
>
> I do not follow this issue in detail. However, I suppose that if OVMF
> supports UEFI secure boot (well, QEMU has to enable SMM support too;
> I do not know does it work with Xen or not) then guest should work
> without any issue. Just guessing...
>

Sure, was just wondering if you are aware of anyone looking at that.

In other news I was able to get your patches working and have been
able to boot with Secure boot enabled as far as shim -> signed grub ->
signed linux without initrd. If I boot a signed version of Xen from
grub it goes as far as setup_efi_pci but then the system reboots
without anything else being printed on the screen. I haven't been able
to debug it any further yet.

Tamas

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