Re: [PATCH v2 0/2] MTE support for KVM guest

[Richard Henderson]

On 9/10/20 3:24 AM, Steven Price wrote:
> It is a shame, however I suspect this is because to use those instructions you
> need to know the block size held in GMID_EL1. And at least in theory that 
> could
> vary between CPUs.

Which is no different from having to read DCZID_EL0 in order to implement
memset, in my opinion.  But, whatever.


> When we have some real hardware it would be worth profiling this. At the 
> moment
> I've no idea whether the kernel entry overhead would make such an interface
> useful from a performance perspective or not.

Yep.


r~