KVM: arm/arm64: vgic: Get rid of unnecessary process_maintenance operation

Browse source

Since we always read back the LRs that we wrote to the guest and the
MISR and EISR registers simply provide a summary of the configuration of
the bits in the LRs, there is really no need to read back those status
registers and process them.  We might as well just signal the
notifyfd when folding the LR state and save some cycles in the process.
We now clear the underflow bit in the fold_lr_state functions as we only
need to clear this bit if we had used all the LRs, so this is as good a
place as any to do that work.

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

...

This commit is contained in:

Christoffer Dall 2016-12-29 15:44:27 +01:00 • committed by Christoffer Dall

parent 90cac1f52a

commit af0614991a

4 changed files with 25 additions and 96 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

61

virt/kvm/arm/vgic/vgic-v2.c

View file

53

virt/kvm/arm/vgic/vgic-v3.c

View file

9

virt/kvm/arm/vgic/vgic.c

View file

2

virt/kvm/arm/vgic/vgic.h

View file