Re: [kvm-unit-tests PATCH v2 3/8] arm64: microbench: gic: Add gicv4.1 support for ipi latency test.

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On 7/2/2020 5:17 PM, Marc Zyngier wrote:
On 2020-07-02 10:02, Jingyi Wang wrote:
Hi Marc,

On 7/2/2020 4:22 PM, Marc Zyngier wrote:
On 2020-07-02 04:01, Jingyi Wang wrote:
If gicv4.1(sgi hardware injection) supported, we test ipi injection
via hw/sw way separately.

nit: active-less SGIs are not strictly a feature of GICv4.1 (you could
imagine a GIC emulation offering the same thing). Furthermore, GICv4.1
isn't as such visible to the guest itself (it only sees a GICv3).

Thanks,

         M.

Yes, but to measure the performance difference of hw/sw SGI injection,
do you think it is acceptable to make it visible to guest and let it
switch SGI injection mode?

It is of course acceptable. I simply object to the "GICv4.1" description.

         M.

Okay, maybe description like "GICv4.1 supported kvm" is better.

Thanks,
Jingyi




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