KVM: arm64: Allow get_pkvm_hyp_vm() to take a reference to a dying VM

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Now that completion of the teardown path requires a refcount of zero for
the target VM, we can allow get_pkvm_hyp_vm() to take a reference on a
dying VM, which is necessary to unshare pages with a non-protected VM
during the teardown process itself.

Note that vCPUs belonging to a dying VM cannot be loaded and pages can
only be reclaimed from a protected VM (via
__pkvm_reclaim_dying_guest_page()) if the target VM is in the dying
state.

Signed-off-by: Will Deacon <will@kernel.org>
Link: https://patch.msgid.link/20260331155056.28220-3-will@kernel.org
Signed-off-by: Marc Zyngier <maz@kernel.org>

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Will Deacon 2026-03-31 16:50:54 +01:00 • committed by Marc Zyngier

parent 760299a1d8

commit 2400696883

1 changed files with 1 additions and 7 deletions

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arch/arm64/kvm/hyp/nvhe/pkvm.c

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