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linux-next/arch/arm/kvm
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
..
arm.c KVM: arm/arm64: add irqfd support 2015-03-12 15:15:34 +01:00
coproc_a7.c arm/arm64: KVM: Use set/way op trapping to track the state of the caches 2015-01-29 23:24:56 +01:00
coproc_a15.c arm/arm64: KVM: Use set/way op trapping to track the state of the caches 2015-01-29 23:24:56 +01:00
coproc.c arm/arm64: KVM: Use set/way op trapping to track the state of the caches 2015-01-29 23:24:56 +01:00
coproc.h arm/arm64: KVM: Use set/way op trapping to track the state of the caches 2015-01-29 23:24:56 +01:00
emulate.c KVM: ARM: Fix typo in comments of inject_abt() 2013-10-02 17:29:19 +01:00
guest.c arm/arm64: KVM: Kill CONFIG_KVM_ARM_{VGIC,TIMER} 2015-03-12 15:15:27 +01:00
handle_exit.c ARM: KVM: extend WFI tracepoint to differentiate between wfi and wfe 2015-01-15 13:12:27 +01:00
init.S ARM/ARM64: KVM: Nuke Hyp-mode tlbs before enabling MMU 2014-08-29 11:53:26 +02:00
interrupts_head.S arm/arm64: KVM: Kill CONFIG_KVM_ARM_{VGIC,TIMER} 2015-03-12 15:15:27 +01:00
interrupts.S KVM: arm: Add ARMv7 API to flush TLBs 2015-01-16 14:40:14 +01:00
Kconfig KVM: arm/arm64: add irqfd support 2015-03-12 15:15:34 +01:00
Makefile KVM: arm/arm64: add irqfd support 2015-03-12 15:15:34 +01:00
mmio.c arm/arm64: KVM: avoid unnecessary guest register mangling on MMIO read 2014-11-25 13:57:28 +00:00
mmu.c arm/arm64: KVM: Implement Stage-2 page aging 2015-03-12 22:34:43 +01:00
perf.c ARM: KVM: add support for minimal host vs guest profiling 2013-04-28 21:44:01 -07:00
psci.c arm/arm64: KVM: rework MPIDR assignment and add accessors 2015-01-20 18:25:17 +01:00
reset.c Updates for KVM/ARM, take 3 supporting more than 4 CPUs. 2013-11-11 12:02:27 +01:00
trace.h arm/arm64: KVM: Implement Stage-2 page aging 2015-03-12 22:34:43 +01:00