Subject: [PATCH v4 38/38] drivers/virt: pkvm: Add Kconfig dependency on DMA_RESTRICTED_POOL

From: Will Deacon <[email-masked]>
Date: Fri, 27 Mar 2026 14:00:37 +0000

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 <[email-masked]>
Signed-off-by: Will Deacon <[email-masked]>
---
 drivers/virt/coco/pkvm-guest/Kconfig | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/virt/coco/pkvm-guest/Kconfig b/drivers/virt/coco/pkvm-guest/Kconfig
index d2f344f1f98f..928b8e1668cc 100644
--- 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
-- 
2.53.0.1018.g2bb0e51243-goog