[PATCHv4 14/17] arm64: uaccess: remove set_fs()

[James Morse]

Hi Mark,

On 17/11/2020 11:07, Mark Rutland wrote:
> On Tue, Nov 17, 2020 at 11:02:20AM +0000, Catalin Marinas wrote:
>> On Tue, Nov 17, 2020 at 10:57:40AM +0000, Mark Rutland wrote:
>>> On Tue, Nov 17, 2020 at 10:54:18AM +0000, Catalin Marinas wrote:
>>>> Does this requirement apply retrospectively or it only for the future
>>>> SDEI specs?
>>>
>>> It applies from the current spec, but note that TF-A has always
>>> generated a new PSTATE (with UAO clear).
>>
>> And we can assume that TF-A is the only implementation generating SDEI.
> 
> I *think* so, hopefully James can confirm.

Yup. Neither kvmtool nor Qemu implementations were merged.
We can avoid this with Gavin's in-kernel implementation if asynchronous-page-fault goes
that way.


Thanks,

James