Re: [Xen-devel] [PATCH RFC] Add SUPPORT.md

[George Dunlap <george.dunlap@xxxxxxxxxx>]

On 09/11/2017 05:16 PM, Julien Grall wrote:
> 
> 
> On 11/09/17 15:16, George Dunlap wrote:
>> On 09/07/2017 10:54 PM, Stefano Stabellini wrote:
>>> On Thu, 31 Aug 2017, George Dunlap wrote:
>>>> +### Direct-boot kernel image format
>>>> +
>>>> +    Supported, x86: bzImage
>>>> +    Supported, ARM32: zImage
>>>> +    Supported, ARM64: Image [XXX - Not sure if this is correct]
>>>
>>> On ARM64 it's called Image.gz.
>>
>> Ack.
>>>> +### vTPM Support
>>>> +
>>>> +    Status: Supported, x86 only
>>>
>>> This should probably be x86/vTPM. TPM, the way we are discussing it, is
>>> an x86-only implementation. ARM-based alternatives are not called TPM
>>> AFAIK.
>>
>> Someone said that because this was implemented entirely in userspace,
>> there's no reason the PV TPM couldn't work on ARM.  OTOH I suppose it
>> would be a lot less valuable if there weren't a physical TPM to back
>> it up.
>>
>> Any thoughts on that?
> 
> Per my understanding TPM is a specification and not tie to Arm, x86 or
> else. So if providing the PV driver is agnostic to x86 it should work.
> Note that I haven't looked at the code nor I am aware of some that
> tested it.

OK -- in my local copy I'm not making a distinction between x86 and ARM
then.

But I do wonder if we should make this 'Tech Preview', since it's not
being tested by osstest, and the most recent message from the maintainer
wasn't terribly promising [1].

 -George

[1]
marc.info/?i=<E0A769A898ADB6449596C41F51EF62C6B06031@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxx>

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