diff --git a/hw/m68k/mcf5206.c b/hw/m68k/mcf5206.c
index b155dd8170..a2fef04f8e 100644
--- a/hw/m68k/mcf5206.c
+++ b/hw/m68k/mcf5206.c
@@ -8,6 +8,7 @@
 
 #include "qemu/osdep.h"
 #include "qemu/error-report.h"
+#include "qemu/log.h"
 #include "cpu.h"
 #include "hw/hw.h"
 #include "hw/irq.h"
@@ -225,7 +226,8 @@ static void m5206_mbar_update(m5206_mbar_state *s)
                 break;
             default:
                 /* Unknown vector.  */
-                error_report("Unhandled vector for IRQ %d", irq);
+                qemu_log_mask(LOG_UNIMP, "%s: Unhandled vector for IRQ %d\n",
+                              __func__, irq);
                 vector = 0xf;
                 break;
             }
@@ -273,7 +275,7 @@ static void m5206_mbar_reset(m5206_mbar_state *s)
 }
 
 static uint64_t m5206_mbar_read(m5206_mbar_state *s,
-                                uint64_t offset, unsigned size)
+                                uint16_t offset, unsigned size)
 {
     if (offset >= 0x100 && offset < 0x120) {
         return m5206_timer_read(s->timer[0], offset - 0x100);
@@ -306,11 +308,12 @@ static uint64_t m5206_mbar_read(m5206_mbar_state *s,
     case 0x170: return s->uivr[0];
     case 0x1b0: return s->uivr[1];
     }
-    hw_error("Bad MBAR read offset 0x%x", (int)offset);
+    qemu_log_mask(LOG_GUEST_ERROR, "%s: Bad MBAR offset 0x%"PRIx16"\n",
+                  __func__, offset);
     return 0;
 }
 
-static void m5206_mbar_write(m5206_mbar_state *s, uint32_t offset,
+static void m5206_mbar_write(m5206_mbar_state *s, uint16_t offset,
                              uint64_t value, unsigned size)
 {
     if (offset >= 0x100 && offset < 0x120) {
@@ -360,7 +363,8 @@ static void m5206_mbar_write(m5206_mbar_state *s, uint32_t offset,
         s->uivr[1] = value;
         break;
     default:
-        hw_error("Bad MBAR write offset 0x%x", (int)offset);
+        qemu_log_mask(LOG_GUEST_ERROR, "%s: Bad MBAR offset 0x%"PRIx16"\n",
+                      __func__, offset);
         break;
     }
 }
diff --git a/hw/m68k/mcf5208.c b/hw/m68k/mcf5208.c
index b84c152ce3..2ab9701ad6 100644
--- a/hw/m68k/mcf5208.c
+++ b/hw/m68k/mcf5208.c
@@ -9,10 +9,10 @@
 #include "qemu/osdep.h"
 #include "qemu/units.h"
 #include "qemu/error-report.h"
+#include "qemu/log.h"
 #include "qapi/error.h"
 #include "qemu-common.h"
 #include "cpu.h"
-#include "hw/hw.h"
 #include "hw/irq.h"
 #include "hw/m68k/mcf.h"
 #include "hw/m68k/mcf_fec.h"
@@ -111,8 +111,9 @@ static void m5208_timer_write(void *opaque, hwaddr offset,
     case 4:
         break;
     default:
-        hw_error("m5208_timer_write: Bad offset 0x%x\n", (int)offset);
-        break;
+        qemu_log_mask(LOG_GUEST_ERROR, "%s: Bad offset 0x%" HWADDR_PRIX "\n",
+                      __func__, offset);
+        return;
     }
     m5208_timer_update(s);
 }
@@ -136,7 +137,8 @@ static uint64_t m5208_timer_read(void *opaque, hwaddr addr,
     case 4:
         return ptimer_get_count(s->timer);
     default:
-        hw_error("m5208_timer_read: Bad offset 0x%x\n", (int)addr);
+        qemu_log_mask(LOG_GUEST_ERROR, "%s: Bad offset 0x%" HWADDR_PRIX "\n",
+                      __func__, addr);
         return 0;
     }
 }
@@ -164,7 +166,8 @@ static uint64_t m5208_sys_read(void *opaque, hwaddr addr,
         return 0;
 
     default:
-        hw_error("m5208_sys_read: Bad offset 0x%x\n", (int)addr);
+        qemu_log_mask(LOG_GUEST_ERROR, "%s: Bad offset 0x%" HWADDR_PRIX "\n",
+                      __func__, addr);
         return 0;
     }
 }
@@ -172,7 +175,8 @@ static uint64_t m5208_sys_read(void *opaque, hwaddr addr,
 static void m5208_sys_write(void *opaque, hwaddr addr,
                             uint64_t value, unsigned size)
 {
-    hw_error("m5208_sys_write: Bad offset 0x%x\n", (int)addr);
+    qemu_log_mask(LOG_GUEST_ERROR, "%s: Bad offset 0x%" HWADDR_PRIX "\n",
+                  __func__, addr);
 }
 
 static const MemoryRegionOps m5208_sys_ops = {
diff --git a/hw/m68k/mcf_intc.c b/hw/m68k/mcf_intc.c
index d9e03a06ab..bc20742d9a 100644
--- a/hw/m68k/mcf_intc.c
+++ b/hw/m68k/mcf_intc.c
@@ -8,6 +8,7 @@
 
 #include "qemu/osdep.h"
 #include "qemu/module.h"
+#include "qemu/log.h"
 #include "cpu.h"
 #include "hw/hw.h"
 #include "hw/irq.h"
@@ -80,7 +81,9 @@ static uint64_t mcf_intc_read(void *opaque, hwaddr addr,
     case 0xe1: case 0xe2: case 0xe3: case 0xe4:
     case 0xe5: case 0xe6: case 0xe7:
         /* LnIACK */
-        hw_error("mcf_intc_read: LnIACK not implemented\n");
+        qemu_log_mask(LOG_UNIMP, "%s: LnIACK not implemented (offset 0x%02x)\n",
+                      __func__, offset);
+        /* fallthru */
     default:
         return 0;
     }
@@ -127,8 +130,9 @@ static void mcf_intc_write(void *opaque, hwaddr addr,
         }
         break;
     default:
-        hw_error("mcf_intc_write: Bad write offset %d\n", offset);
-        break;
+        qemu_log_mask(LOG_GUEST_ERROR, "%s: Bad offset 0x%02x\n",
+                      __func__, offset);
+        return;
     }
     mcf_intc_update(s);
 }
diff --git a/hw/net/mcf_fec.c b/hw/net/mcf_fec.c
index 9327ac8a30..281345862c 100644
--- a/hw/net/mcf_fec.c
+++ b/hw/net/mcf_fec.c
@@ -7,7 +7,7 @@
  */
 
 #include "qemu/osdep.h"
-#include "hw/hw.h"
+#include "qemu/log.h"
 #include "hw/irq.h"
 #include "net/net.h"
 #include "qemu/module.h"
@@ -392,7 +392,8 @@ static uint64_t mcf_fec_read(void *opaque, hwaddr addr,
     case 0x188: return s->emrbr;
     case 0x200 ... 0x2e0: return s->mib[(addr & 0x1ff) / 4];
     default:
-        hw_error("mcf_fec_read: Bad address 0x%x\n", (int)addr);
+        qemu_log_mask(LOG_GUEST_ERROR, "%s: Bad address 0x%" HWADDR_PRIX "\n",
+                      __func__, addr);
         return 0;
     }
 }
@@ -492,7 +493,9 @@ static void mcf_fec_write(void *opaque, hwaddr addr,
         s->mib[(addr & 0x1ff) / 4] = value;
         break;
     default:
-        hw_error("mcf_fec_write Bad address 0x%x\n", (int)addr);
+        qemu_log_mask(LOG_GUEST_ERROR, "%s: Bad address 0x%" HWADDR_PRIX "\n",
+                      __func__, addr);
+        return;
     }
     mcf_fec_update(s);
 }