KVM: arm64: Make active_vmids invalid on vCPU schedule out

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Like ASID allocator, we copy the active_vmids into the
reserved_vmids on a rollover. But it's unlikely that
every CPU will have a vCPU as current task and we may
end up unnecessarily reserving the VMID space.

Hence, set active_vmids to an invalid one when scheduling
out a vCPU.

Signed-off-by: Shameer Kolothum <shameerali.kolothum.thodi@huawei.com>
Signed-off-by: Marc Zyngier <maz@kernel.org>
Link: https://lore.kernel.org/r/20211122121844.867-5-shameerali.kolothum.thodi@huawei.com

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Shameer Kolothum 2021-11-22 12:18:44 +00:00 • committed by Marc Zyngier

parent 3248136b36

commit 100b4f092f

3 changed files with 24 additions and 3 deletions

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1

arch/arm64/include/asm/kvm_host.h

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1

arch/arm64/kvm/arm.c

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25

arch/arm64/kvm/vmid.c

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