target/ppc: Print out literal exception names in logs

It facilitates reading the logs when mask CPU_LOG_INT is activated. We
should do the same for error codes.

Cc: Fabiano Rosas <farosas@linux.ibm.com>
Signed-off-by: Cédric Le Goater <clg@kaod.org>
Reviewed-by: Fabiano Rosas <farosas@linux.ibm.com>
Reviewed-by: David Gibson <david@gibson.dropbear.id.au>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-Id: <20211222064025.1541490-2-clg@kaod.org>
Signed-off-by: Cédric Le Goater <clg@kaod.org>
Message-Id: <20220103063441.3424853-3-clg@kaod.org>
Signed-off-by: Cédric Le Goater <clg@kaod.org>

target/ppc/excp_helper.c

@@ -36,6 +36,78 @@
 /* Exception processing */
 #if !defined(CONFIG_USER_ONLY)
 
+static const char *powerpc_excp_name(int excp)
+{
+    switch (excp) {
+    case POWERPC_EXCP_CRITICAL: return "CRITICAL";
+    case POWERPC_EXCP_MCHECK:   return "MCHECK";
+    case POWERPC_EXCP_DSI:      return "DSI";
+    case POWERPC_EXCP_ISI:      return "ISI";
+    case POWERPC_EXCP_EXTERNAL: return "EXTERNAL";
+    case POWERPC_EXCP_ALIGN:    return "ALIGN";
+    case POWERPC_EXCP_PROGRAM:  return "PROGRAM";
+    case POWERPC_EXCP_FPU:      return "FPU";
+    case POWERPC_EXCP_SYSCALL:  return "SYSCALL";
+    case POWERPC_EXCP_APU:      return "APU";
+    case POWERPC_EXCP_DECR:     return "DECR";
+    case POWERPC_EXCP_FIT:      return "FIT";
+    case POWERPC_EXCP_WDT:      return "WDT";
+    case POWERPC_EXCP_DTLB:     return "DTLB";
+    case POWERPC_EXCP_ITLB:     return "ITLB";
+    case POWERPC_EXCP_DEBUG:    return "DEBUG";
+    case POWERPC_EXCP_SPEU:     return "SPEU";
+    case POWERPC_EXCP_EFPDI:    return "EFPDI";
+    case POWERPC_EXCP_EFPRI:    return "EFPRI";
+    case POWERPC_EXCP_EPERFM:   return "EPERFM";
+    case POWERPC_EXCP_DOORI:    return "DOORI";
+    case POWERPC_EXCP_DOORCI:   return "DOORCI";
+    case POWERPC_EXCP_GDOORI:   return "GDOORI";
+    case POWERPC_EXCP_GDOORCI:  return "GDOORCI";
+    case POWERPC_EXCP_HYPPRIV:  return "HYPPRIV";
+    case POWERPC_EXCP_RESET:    return "RESET";
+    case POWERPC_EXCP_DSEG:     return "DSEG";
+    case POWERPC_EXCP_ISEG:     return "ISEG";
+    case POWERPC_EXCP_HDECR:    return "HDECR";
+    case POWERPC_EXCP_TRACE:    return "TRACE";
+    case POWERPC_EXCP_HDSI:     return "HDSI";
+    case POWERPC_EXCP_HISI:     return "HISI";
+    case POWERPC_EXCP_HDSEG:    return "HDSEG";
+    case POWERPC_EXCP_HISEG:    return "HISEG";
+    case POWERPC_EXCP_VPU:      return "VPU";
+    case POWERPC_EXCP_PIT:      return "PIT";
+    case POWERPC_EXCP_IO:       return "IO";
+    case POWERPC_EXCP_RUNM:     return "RUNM";
+    case POWERPC_EXCP_EMUL:     return "EMUL";
+    case POWERPC_EXCP_IFTLB:    return "IFTLB";
+    case POWERPC_EXCP_DLTLB:    return "DLTLB";
+    case POWERPC_EXCP_DSTLB:    return "DSTLB";
+    case POWERPC_EXCP_FPA:      return "FPA";
+    case POWERPC_EXCP_DABR:     return "DABR";
+    case POWERPC_EXCP_IABR:     return "IABR";
+    case POWERPC_EXCP_SMI:      return "SMI";
+    case POWERPC_EXCP_PERFM:    return "PERFM";
+    case POWERPC_EXCP_THERM:    return "THERM";
+    case POWERPC_EXCP_VPUA:     return "VPUA";
+    case POWERPC_EXCP_SOFTP:    return "SOFTP";
+    case POWERPC_EXCP_MAINT:    return "MAINT";
+    case POWERPC_EXCP_MEXTBR:   return "MEXTBR";
+    case POWERPC_EXCP_NMEXTBR:  return "NMEXTBR";
+    case POWERPC_EXCP_ITLBE:    return "ITLBE";
+    case POWERPC_EXCP_DTLBE:    return "DTLBE";
+    case POWERPC_EXCP_VSXU:     return "VSXU";
+    case POWERPC_EXCP_FU:       return "FU";
+    case POWERPC_EXCP_HV_EMU:   return "HV_EMU";
+    case POWERPC_EXCP_HV_MAINT: return "HV_MAINT";
+    case POWERPC_EXCP_HV_FU:    return "HV_FU";
+    case POWERPC_EXCP_SDOOR:    return "SDOOR";
+    case POWERPC_EXCP_SDOOR_HV: return "SDOOR_HV";
+    case POWERPC_EXCP_HVIRT:    return "HVIRT";
+    case POWERPC_EXCP_SYSCALL_VECTORED: return "SYSCALL_VECTORED";
+    default:
+        g_assert_not_reached();
+    }
+}
+
 static void dump_syscall(CPUPPCState *env)
 {
     qemu_log_mask(CPU_LOG_INT, "syscall r0=%016" PRIx64
@@ -301,7 +373,8 @@ static void powerpc_excp(PowerPCCPU *cpu, int excp_model, int excp)
     int srr0, srr1, asrr0, asrr1, lev = -1;
 
     qemu_log_mask(CPU_LOG_INT, "Raise exception at " TARGET_FMT_lx
-                  " => %08x (%02x)\n", env->nip, excp, env->error_code);
+                  " => %s (%d) error=%02x\n", env->nip, powerpc_excp_name(excp),
+                  excp, env->error_code);
 
     /* new srr1 value excluding must-be-zero bits */
     if (excp_model == POWERPC_EXCP_BOOKE) {