KVM: arm64: Introduce a new VMID allocator for KVM
A new VMID allocator for arm64 KVM use. This is based on arm64 ASID allocator algorithm. One major deviation from the ASID allocator is the way we flush the context. Unlike ASID allocator, we expect less frequent rollover in the case of VMIDs. Hence, instead of marking the CPU as flush_pending and issuing a local context invalidation on the next context switch, we broadcast TLB flush + I-cache invalidation over the inner shareable domain on rollover. Signed-off-by: Shameer Kolothum <shameerali.kolothum.thodi@huawei.com> Signed-off-by: Marc Zyngier <maz@kernel.org> Link: https://lore.kernel.org/r/20211122121844.867-2-shameerali.kolothum.thodi@huawei.com
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arch/arm64/kvm/vmid.c
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