s390: kvm: Cpu model support for msa6, msa7 and msa8

msa6 and msa7 require no changes.
msa8 adds kma instruction and feature area.

Signed-off-by: Jason J. Herne <jjherne@linux.vnet.ibm.com>
Reviewed-by: Christian Borntraeger <borntraeger@de.ibm.com>
Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
diff --git a/tools/arch/s390/include/uapi/asm/kvm.h b/tools/arch/s390/include/uapi/asm/kvm.h
index a2ffec4..7f4fd65 100644
--- a/tools/arch/s390/include/uapi/asm/kvm.h
+++ b/tools/arch/s390/include/uapi/asm/kvm.h
@@ -131,7 +131,8 @@ struct kvm_s390_vm_cpu_subfunc {
 	__u8 kmo[16];		/* with MSA4 */
 	__u8 pcc[16];		/* with MSA4 */
 	__u8 ppno[16];		/* with MSA5 */
-	__u8 reserved[1824];
+	__u8 kma[16];		/* with MSA8 */
+	__u8 reserved[1808];
 };
 
 /* kvm attributes for crypto */