virtio-mem currently depends on !DEVMEM | STRICT_DEVMEM. Let's default
STRICT_DEVMEM to "y" just like we do for arm64 and x86.

There could be ways in the future to filter access to virtio-mem device
memory even without STRICT_DEVMEM, but for now let's just keep it
simple.

Tested-by: Mario Casquero <mcasquer@redhat.com>
Acked-by: Heiko Carstens <hca@linux.ibm.com>
Signed-off-by: David Hildenbrand <david@redhat.com>
---
 lib/Kconfig.debug | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/lib/Kconfig.debug b/lib/Kconfig.debug
index 7312ae7c3cc5..fcad505e7c8b 100644
--- a/lib/Kconfig.debug
+++ b/lib/Kconfig.debug
@@ -1905,7 +1905,7 @@ config STRICT_DEVMEM
 	bool "Filter access to /dev/mem"
 	depends on MMU && DEVMEM
 	depends on ARCH_HAS_DEVMEM_IS_ALLOWED || GENERIC_LIB_DEVMEM_IS_ALLOWED
-	default y if PPC || X86 || ARM64
+	default y if PPC || X86 || ARM64 || S390
 	help
 	  If this option is disabled, you allow userspace (root) access to all
 	  of memory, including kernel and userspace memory. Accidental
-- 
2.46.1