KVM: arm64: Hook up donation hypercall to pkvm_pgtable_stage2_map()

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Mapping pages into a protected guest requires the donation of memory
from the host.

Extend pkvm_pgtable_stage2_map() to issue a donate hypercall when the
target VM is protected. Since the hypercall only handles a single page,
the splitting logic used for the share path is not required.

Tested-by: Fuad Tabba <tabba@google.com>
Tested-by: Mostafa Saleh <smostafa@google.com>
Signed-off-by: Will Deacon <will@kernel.org>
Link: https://patch.msgid.link/20260330144841.26181-14-will@kernel.org
Signed-off-by: Marc Zyngier <maz@kernel.org>

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Will Deacon 2026-03-30 15:48:14 +01:00 • committed by Marc Zyngier

parent 1e579adca1

commit 5fef16ef49

1 changed files with 41 additions and 17 deletions

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arch/arm64/kvm/pkvm.c

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