KVM: arm64: Add hvc handler at EL2 for hypercalls from protected VMs

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Add a hypercall handler at EL2 for hypercalls originating from protected
VMs. For now, this implements only the FEATURES and MEMINFO calls, but
subsequent patches will implement the SHARE and UNSHARE functions
necessary for virtio.

Unhandled hypercalls (including PSCI) are passed 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/20260330144841.26181-29-will@kernel.org
Signed-off-by: Marc Zyngier <maz@kernel.org>

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Will Deacon 2026-03-30 15:48:29 +01:00 • committed by Marc Zyngier

parent 5991916392

commit 94c5250515

3 changed files with 39 additions and 0 deletions

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

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

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

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