drivers/virt: pkvm: Add Kconfig dependency on DMA_RESTRICTED_POOL

pKVM guests practically rely on CONFIG_DMA_RESTRICTED_POOL=y in order
to establish shared memory regions with the host for virtio buffers.

Make CONFIG_ARM_PKVM_GUEST depend on CONFIG_DMA_RESTRICTED_POOL to avoid
the inevitable segmentation faults experience if you have the former but
not the latter.

Reported-by: Marc Zyngier <maz@kernel.org>
Signed-off-by: Will Deacon <will@kernel.org>
Link: https://patch.msgid.link/20260330144841.26181-39-will@kernel.org
Signed-off-by: Marc Zyngier <maz@kernel.org>

diff --git a/drivers/virt/coco/pkvm-guest/Kconfig b/drivers/virt/coco/pkvm-guest/Kconfig
index d2f344f1f98f7bc954cb6ebe37f698961642f5a2..928b8e1668ccc3a8539b61b716c11b2d11fef8fc 100644 (file)
--- a/drivers/virt/coco/pkvm-guest/Kconfig
+++ b/drivers/virt/coco/pkvm-guest/Kconfig
@@ -1,6 +1,6 @@
 config ARM_PKVM_GUEST
        bool "Arm pKVM protected guest driver"
-       depends on ARM64
+       depends on ARM64 && DMA_RESTRICTED_POOL
        help
          Protected guests running under the pKVM hypervisor on arm64
          are isolated from the host and must issue hypercalls to enable