KVM: arm64: Implement the MEM_SHARE hypercall for protected VMs

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Implement the ARM_SMCCC_KVM_FUNC_MEM_SHARE hypercall to allow protected
VMs to share memory (e.g. the swiotlb bounce buffers) back to the host.

Reviewed-by: Vincent Donnefort <vdonnefort@google.com>
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/20260330144841.26181-30-will@kernel.org
Signed-off-by: Marc Zyngier <maz@kernel.org>

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

parent 94c5250515

commit 03313efed5

3 changed files with 94 additions and 0 deletions

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arch/arm64/kvm/hyp/include/nvhe/mem_protect.h

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

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

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