Messages in this thread | | | Subject | Re: [PATCH v2 0/2] MTE support for KVM guest | From | Richard Henderson <> | Date | Thu, 10 Sep 2020 08:36:44 -0700 |
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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~
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