target/s390x: mask the SIGP order_code using SIGP_ORDER_MASK

For that move the definition from kvm.c to cpu.h

Reviewed-by: Thomas Huth <thuth@redhat.com>
Reviewed-by: Cornelia Huck <cornelia.huck@de.ibm.com>
Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
Message-Id: <20170509082800.10756-2-aurelien@aurel32.net>
Signed-off-by: Richard Henderson <rth@twiddle.net>

target/s390x/cpu.h

@@ -1078,6 +1078,9 @@ struct sysib_322 {
 #define SIGP_MODE_Z_ARCH_TRANS_ALL_PSW 1
 #define SIGP_MODE_Z_ARCH_TRANS_CUR_PSW 2
 
+/* SIGP order code mask corresponding to bit positions 56-63 */
+#define SIGP_ORDER_MASK 0x000000ff
+
 void load_psw(CPUS390XState *env, uint64_t mask, uint64_t addr);
 int mmu_translate(CPUS390XState *env, target_ulong vaddr, int rw, uint64_t asc,
                   target_ulong *raddr, int *flags, bool exc);

target/s390x/kvm.c

@@ -1764,8 +1764,6 @@ static int sigp_set_architecture(S390CPU *cpu, uint32_t param,
     return SIGP_CC_ORDER_CODE_ACCEPTED;
 }
 
-#define SIGP_ORDER_MASK 0x000000ff
-
 static int handle_sigp(S390CPU *cpu, struct kvm_run *run, uint8_t ipa1)
 {
     CPUS390XState *env = &cpu->env;

target/s390x/misc_helper.c

@@ -517,8 +517,7 @@ uint32_t HELPER(sigp)(CPUS390XState *env, uint64_t order_code, uint32_t r1,
     /* Remember: Use "R1 or R1 + 1, whichever is the odd-numbered register"
        as parameter (input). Status (output) is always R1. */
 
-    /* sigp contains the order code in bit positions 56-63, mask it here. */
-    switch (order_code & 0xff) {
+    switch (order_code & SIGP_ORDER_MASK) {
     case SIGP_SET_ARCH:
         /* switch arch */
         break;