Merge tag 'kvm-s390-master-5.10-2' of git://git.kernel.org/pub/scm/li…

…nux/kernel/git/kvms390/linux into kvm-master

KVM: s390: Fix for destroy page ultravisor call

- handle response code from older firmware
- add uv.c to KVM: s390/s390 maintainer list

MAINTAINERS

@@ -9655,6 +9655,7 @@ F:	Documentation/virt/kvm/s390*
 F:	arch/s390/include/asm/gmap.h
 F:	arch/s390/include/asm/kvm*
 F:	arch/s390/include/uapi/asm/kvm*
+F:	arch/s390/kernel/uv.c
 F:	arch/s390/kvm/
 F:	arch/s390/mm/gmap.c
 F:	tools/testing/selftests/kvm/*/s390x/

arch/s390/kernel/uv.c

@@ -129,8 +129,15 @@ int uv_destroy_page(unsigned long paddr)
 		.paddr = paddr
 	};
 
-	if (uv_call(0, (u64)&uvcb))
+	if (uv_call(0, (u64)&uvcb)) {
+		/*
+		 * Older firmware uses 107/d as an indication of a non secure
+		 * page. Let us emulate the newer variant (no-op).
+		 */
+		if (uvcb.header.rc == 0x107 && uvcb.header.rrc == 0xd)
+			return 0;
 		return -EINVAL;
+	}
 	return 0;
 }