KVM: arm64: Simplify nested VMA shift calculation

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In the kvm_s2_resolve_vma_size() helper, the local variable vma_pagesize
is calculated from vma_shift, only to be used to bound the vma_pagesize
by max_map_size and subsequently convert it back to a shift via __ffs().

Because vma_pagesize and max_map_size are both powers of two, we can
simplify the logic by omitting vma_pagesize entirely and bounding the
vma_shift directly using the shift of max_map_size. This achieves the
same result while keeping the size-to-shift conversion out of the helper
logic.

Signed-off-by: Fuad Tabba <tabba@google.com>
Signed-off-by: Marc Zyngier <maz@kernel.org>

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Fuad Tabba 2026-03-06 14:02:26 +00:00 • committed by Marc Zyngier

parent 5557a3f843

commit 2175ca5384

1 changed files with 1 additions and 5 deletions

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arch/arm64/kvm/mmu.c

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