[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

Re: [Xen-devel] [PATCH v3 05/11] optee: add fast calls handling





On 17/01/2019 20:10, Volodymyr Babchuk wrote:

Hi,

Julien Grall writes:

Hi,

On 1/17/19 7:22 PM, Volodymyr Babchuk wrote:
Julien Grall writes:

[...]
Because mediator can't share one static SHM region with all guests,
it just disables it for all.

I haven't seen an answer to my question on the previous version. For reminder:
I'm sorry, I missed this somehow.


Would it make sense to still allow the hardware domain to access static SHM?
Not really. If linux drivers sees that OP-TEE support dynamic SHM, it
uses it by default. And all new versions of OP-TEE support dynamic SHM.

So, it will add unnecessary code to enable feature which will not be used.

But, actually, there is a caveat. Right now linux driver requires static SHM,
even if it will not use it. I have submitted patch that fixes it, but
it still not merged.

So... what do you think? Should I add piece of code which is needed
right now, but will not be used later?

I think it would be nice to have OP-TEE working in Dom0 with current
Linux. For the guest, we can require a more recent Linux if there are
no other solution.

Okay, I'll take a look what can be done. Can I do this in a separate patch?

I am fine with that. Please mention it in the commit message though.

Cheers,

--
Julien Grall

_______________________________________________
Xen-devel mailing list
Xen-devel@xxxxxxxxxxxxxxxxxxxx
https://lists.xenproject.org/mailman/listinfo/xen-devel

 


Rackspace

Lists.xenproject.org is hosted with RackSpace, monitoring our
servers 24x7x365 and backed by RackSpace's Fanatical Support®.