target/s390x: Implement processor-assist insn

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

target/s390x/insn-data.def

@@ -699,6 +699,9 @@
     /* Implemented as nops of course.  */
     C(0xe336, PFD,     RXY_b, GIE, 0, 0, 0, 0, 0, 0)
     C(0xc602, PFDRL,   RIL_c, GIE, 0, 0, 0, 0, 0, 0)
+/* PERFORM PROCESSOR ASSIST */
+    /* Implemented as nop of course.  */
+    C(0xb2e8, PPA,     RRF_c, PPA, 0, 0, 0, 0, 0, 0)
 
 /* POPULATION COUNT */
     C(0xb9e1, POPCNT,  RRE,   PC,  0, r2_o, r1, 0, popcnt, nz64)

target/s390x/translate.c

@@ -5444,6 +5444,7 @@ enum DisasInsnEnum {
 #define FAC_DAT_ENH     S390_FEAT_DAT_ENH
 #define FAC_E2          S390_FEAT_EXTENDED_TRANSLATION_2
 #define FAC_EH          S390_FEAT_STFLE_49 /* execution-hint */
+#define FAC_PPA         S390_FEAT_STFLE_49 /* processor-assist */
 #define FAC_LZRB        S390_FEAT_STFLE_53 /* load-and-zero-rightmost-byte */
 
 static const DisasInsn insn_info[] = {