KVM: arm64: Support dirty page tracking for PUD hugepages
authorPunit Agrawal <punit.agrawal@arm.com>
Tue, 11 Dec 2018 17:10:37 +0000 (17:10 +0000)
committerMarc Zyngier <marc.zyngier@arm.com>
Tue, 18 Dec 2018 15:14:47 +0000 (15:14 +0000)
commit4ea5af53114091e23a8fc279f25637e6c4e892c6
treef81d7d136dc8d099ffb8a7960bad1bf11b321fe8
parentf8df73388ee25b5e5f1d26249202e7126ca8139d
KVM: arm64: Support dirty page tracking for PUD hugepages

In preparation for creating PUD hugepages at stage 2, add support for
write protecting PUD hugepages when they are encountered. Write
protecting guest tables is used to track dirty pages when migrating
VMs.

Also, provide trivial implementations of required kvm_s2pud_* helpers
to allow sharing of code with arm32.

Signed-off-by: Punit Agrawal <punit.agrawal@arm.com>
Reviewed-by: Christoffer Dall <christoffer.dall@arm.com>
Cc: Russell King <linux@armlinux.org.uk>
Cc: Catalin Marinas <catalin.marinas@arm.com>
Cc: Will Deacon <will.deacon@arm.com>
[ Replaced BUG() => WARN_ON() in arm32 pud helpers ]
Signed-off-by: Suzuki K Poulose <suzuki.poulose@arm.com>
Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
arch/arm/include/asm/kvm_mmu.h
arch/arm64/include/asm/kvm_mmu.h
virt/kvm/arm/mmu.c