KVM: arm/arm64: vgic-v2: Avoid accessing GICH registers

Browse source

GICv2 registers are *slow*. As in "terrifyingly slow". Which is bad.
But we're equaly bad, as we make a point in accessing them even if
we don't have any interrupt in flight.

A good solution is to first find out if we have anything useful to
write into the GIC, and if we don't, to simply not do it. This
involves tracking which LRs actually have something valid there.

Reviewed-by: Christoffer Dall <christoffer.dall@linaro.org>
Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>

...

This commit is contained in:

Marc Zyngier 2016-02-02 19:35:34 +00:00

parent 9b4a300443

commit 59f00ff9af

2 changed files with 52 additions and 22 deletions

Show all changes Ignore whitespace when comparing lines Ignore changes in amount of whitespace Ignore changes in whitespace at EOL

Download patch file Download diff file Expand all files Collapse all files

2

include/kvm/arm_vgic.h

View file