[PATCH v2 0/2] MTE support for KVM guest
richard.henderson at linaro.org
Thu Sep 10 11:36:44 EDT 2020
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.
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