target/s390x: Implement CSPG

Reviewed-by: Aurelien Jarno <aurelien@aurel32.net>
Signed-off-by: Richard Henderson <rth@twiddle.net>

target/s390x/insn-data.def

@@ -838,6 +838,7 @@
 #ifndef CONFIG_USER_ONLY
 /* COMPARE AND SWAP AND PURGE */
     D(0xb250, CSP,     RRE,   Z,   r1_32u, ra2, r1_P, 0, csp, 0, MO_TEUL)
+    D(0xb98a, CSPG,    RRE, DAT_ENH, r1_o, ra2, r1_P, 0, csp, 0, MO_TEQ)
 /* DIAGNOSE (KVM hypercall) */
     C(0x8300, DIAG,    RSI,   Z,   0, 0, 0, 0, diag, 0)
 /* INSERT STORAGE KEY EXTENDED */

target/s390x/translate.c

@@ -1200,6 +1200,7 @@ typedef enum DisasFacility {
     FAC_SFLE,               /* store facility list extended */
     FAC_ILA,                /* interlocked access facility 1 */
     FAC_LPP,                /* load-program-parameter */
+    FAC_DAT_ENH,            /* DAT-enhancement */
 } DisasFacility;
 
 struct DisasInsn {