linux_dsm_epyc7002/arch/arm/include
Marc Zyngier 35307b9a5f arm/arm64: KVM: Implement Stage-2 page aging
Until now, KVM/arm didn't care much for page aging (who was swapping
anyway?), and simply provided empty hooks to the core KVM code. With
server-type systems now being available, things are quite different.

This patch implements very simple support for page aging, by clearing
the Access flag in the Stage-2 page tables. On access fault, the current
fault handling will write the PTE or PMD again, putting the Access flag
back on.

It should be possible to implement a much faster handling for Access
faults, but that's left for a later patch.

With this in place, performance in VMs is degraded much more gracefully.

Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
Acked-by: Christoffer Dall <christoffer.dall@linaro.org>
Signed-off-by: Christoffer Dall <christoffer.dall@linaro.org>
2015-03-12 22:34:43 +01:00
..
asm arm/arm64: KVM: Implement Stage-2 page aging 2015-03-12 22:34:43 +01:00
debug ARM: SoC platform changes 2015-02-17 09:27:54 -08:00
uapi/asm KVM: arm/arm64: add irqfd support 2015-03-12 15:15:34 +01:00