Re: [PATCH v2 0/2] KVM: arm64: Optimize the wait for the completion of the VPT analysis

On Sat, 28 Nov 2020 22:18:55 +0800, Shenming Lu wrote:

Right after a vPE is made resident, the code starts polling the
GICR_VPENDBASER.Dirty bit until it becomes 0, where the delay_us
is set to 10. But in our measurement, it takes only hundreds of
nanoseconds, or 1~2 microseconds, to finish parsing the VPT in most
cases. What's more, we found that the MMIO delay on GICv4.1 system
(HiSilicon) is about 10 times higher than that on GICv4.0 system in
kvm-unit-tests (the specific data is as follows).

[...]

Applied to irq/irqchip-next, thanks!

[1/2] irqchip/gic-v4.1: Reduce the delay time of the poll on the GICR_VPENDBASER.Dirty bit
      commit: 0b39498230ae53e6af981141be99f4c7d5144de6

Patch 2 will be routed via the KVM/arm64 tree.

Cheers,

	M.
-- 
Without deviation from the norm, progress is not possible.