KVM: arm64: pkvm: Refcount the pages shared with EL2

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In order to simplify the page tracking infrastructure at EL2 in nVHE
protected mode, move the responsibility of refcounting pages that are
shared multiple times on the host. In order to do so, let's create a
red-black tree tracking all the PFNs that have been shared, along with
a refcount.

Acked-by: Will Deacon <will@kernel.org>
Signed-off-by: Quentin Perret <qperret@google.com>
Signed-off-by: Marc Zyngier <maz@kernel.org>
Link: https://lore.kernel.org/r/20211215161232.1480836-8-qperret@google.com

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Quentin Perret 2021-12-15 16:12:24 +00:00 • committed by Marc Zyngier

parent 3f868e142c

commit a83e2191b7

1 changed files with 68 additions and 10 deletions

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arch/arm64/kvm/mmu.c

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