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Re: [PATCH v2 0/2] MTE support for KVM guest
From: |
Richard Henderson |
Subject: |
Re: [PATCH v2 0/2] MTE support for KVM guest |
Date: |
Thu, 10 Sep 2020 08:36:44 -0700 |
User-agent: |
Mozilla/5.0 (X11; Linux x86_64; rv:68.0) Gecko/20100101 Thunderbird/68.10.0 |
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~
- Re: [PATCH v2 0/2] MTE support for KVM guest, (continued)
Re: [PATCH v2 0/2] MTE support for KVM guest, Richard Henderson, 2020/09/09
Re: [PATCH v2 0/2] MTE support for KVM guest, Richard Henderson, 2020/09/09