diff --git a/hw/block/fdc.c b/hw/block/fdc.c
index 7c1c57f57fa6801ff31a266cefe0bad9c320f90f..2e9c1e1e2ff871b0b6ca4b8b4b5f3f142ad87a50 100644
--- a/hw/block/fdc.c
+++ b/hw/block/fdc.c
@@ -40,6 +40,7 @@
 #include "sysemu/blockdev.h"
 #include "sysemu/sysemu.h"
 #include "qemu/log.h"
+#include "trace.h"
 
 /********************************************************/
 /* debug Floppy devices */
@@ -927,7 +928,7 @@ static uint32_t fdctrl_read (void *opaque, uint32_t reg)
         retval = (uint32_t)(-1);
         break;
     }
-    FLOPPY_DPRINTF("read reg%d: 0x%02x\n", reg & 7, retval);
+    trace_fdc_ioport_read(reg, retval);
 
     return retval;
 }
@@ -936,9 +937,8 @@ static void fdctrl_write (void *opaque, uint32_t reg, uint32_t value)
 {
     FDCtrl *fdctrl = opaque;
 
-    FLOPPY_DPRINTF("write reg%d: 0x%02x\n", reg & 7, value);
-
     reg &= 7;
+    trace_fdc_ioport_write(reg, value);
     switch (reg) {
     case FD_REG_DOR:
         fdctrl_write_dor(fdctrl, value);
diff --git a/hw/block/pflash_cfi01.c b/hw/block/pflash_cfi01.c
index e4b5b3c2730967de6a97881d0a1c40c097bf78c6..bffb4c40e7be52f5ed18633f558ca392cf9271f2 100644
--- a/hw/block/pflash_cfi01.c
+++ b/hw/block/pflash_cfi01.c
@@ -47,6 +47,7 @@
 #include "qemu/log.h"
 #include "hw/sysbus.h"
 #include "sysemu/sysemu.h"
+#include "trace.h"
 
 #define PFLASH_BUG(fmt, ...) \
 do { \
@@ -120,7 +121,7 @@ static void pflash_timer (void *opaque)
 {
     pflash_t *pfl = opaque;
 
-    DPRINTF("%s: command %02x done\n", __func__, pfl->cmd);
+    trace_pflash_timer_expired(pfl->cmd);
     /* Reset flash */
     pfl->status ^= 0x80;
     memory_region_rom_device_set_romd(&pfl->mem, true);
@@ -218,15 +219,14 @@ static uint32_t pflash_devid_query(pflash_t *pfl, hwaddr offset)
     switch (boff & 0xFF) {
     case 0:
         resp = pfl->ident0;
-        DPRINTF("%s: Manufacturer Code %04x\n", __func__, resp);
+        trace_pflash_manufacturer_id(resp);
         break;
     case 1:
         resp = pfl->ident1;
-        DPRINTF("%s: Device ID Code %04x\n", __func__, resp);
+        trace_pflash_device_id(resp);
         break;
     default:
-        DPRINTF("%s: Read Device Information offset=%x\n", __func__,
-                (unsigned)offset);
+        trace_pflash_device_info(offset);
         return 0;
         break;
     }
@@ -251,8 +251,7 @@ static uint32_t pflash_data_read(pflash_t *pfl, hwaddr offset,
     switch (width) {
     case 1:
         ret = p[offset];
-        DPRINTF("%s: data offset " TARGET_FMT_plx " %02x\n",
-                __func__, offset, ret);
+        trace_pflash_data_read8(offset, ret);
         break;
     case 2:
         if (be) {
@@ -262,8 +261,7 @@ static uint32_t pflash_data_read(pflash_t *pfl, hwaddr offset,
             ret = p[offset];
             ret |= p[offset + 1] << 8;
         }
-        DPRINTF("%s: data offset " TARGET_FMT_plx " %04x\n",
-                __func__, offset, ret);
+        trace_pflash_data_read16(offset, ret);
         break;
     case 4:
         if (be) {
@@ -277,8 +275,7 @@ static uint32_t pflash_data_read(pflash_t *pfl, hwaddr offset,
             ret |= p[offset + 2] << 16;
             ret |= p[offset + 3] << 24;
         }
-        DPRINTF("%s: data offset " TARGET_FMT_plx " %08x\n",
-                __func__, offset, ret);
+        trace_pflash_data_read32(offset, ret);
         break;
     default:
         DPRINTF("BUG in %s\n", __func__);
@@ -294,11 +291,7 @@ static uint32_t pflash_read (pflash_t *pfl, hwaddr offset,
     uint32_t ret;
 
     ret = -1;
-
-#if 0
-    DPRINTF("%s: reading offset " TARGET_FMT_plx " under cmd %02x width %d\n",
-            __func__, offset, pfl->cmd, width);
-#endif
+    trace_pflash_read(offset, pfl->cmd, width, pfl->wcycle);
     switch (pfl->cmd) {
     default:
         /* This should never happen : reset state & treat it as a read */
@@ -349,15 +342,14 @@ static uint32_t pflash_read (pflash_t *pfl, hwaddr offset,
             switch (boff) {
             case 0:
                 ret = pfl->ident0 << 8 | pfl->ident1;
-                DPRINTF("%s: Manufacturer Code %04x\n", __func__, ret);
+                trace_pflash_manufacturer_id(ret);
                 break;
             case 1:
                 ret = pfl->ident2 << 8 | pfl->ident3;
-                DPRINTF("%s: Device ID Code %04x\n", __func__, ret);
+                trace_pflash_device_id(ret);
                 break;
             default:
-                DPRINTF("%s: Read Device Information boff=%x\n", __func__,
-                        (unsigned)boff);
+                trace_pflash_device_info(boff);
                 ret = 0;
                 break;
             }
@@ -425,9 +417,7 @@ static inline void pflash_data_write(pflash_t *pfl, hwaddr offset,
 {
     uint8_t *p = pfl->storage;
 
-    DPRINTF("%s: block write offset " TARGET_FMT_plx
-            " value %x counter %016" PRIx64 "\n",
-            __func__, offset, value, pfl->counter);
+    trace_pflash_data_write(offset, value, width, pfl->counter);
     switch (width) {
     case 1:
         p[offset] = value;
@@ -466,9 +456,7 @@ static void pflash_write(pflash_t *pfl, hwaddr offset,
 
     cmd = value;
 
-    DPRINTF("%s: writing offset " TARGET_FMT_plx " value %08x width %d wcycle 0x%x\n",
-            __func__, offset, value, width, pfl->wcycle);
-
+    trace_pflash_write(offset, value, width, pfl->wcycle);
     if (!pfl->wcycle) {
         /* Set the device in I/O access mode */
         memory_region_rom_device_set_romd(&pfl->mem, false);
@@ -656,8 +644,8 @@ static void pflash_write(pflash_t *pfl, hwaddr offset,
                   "\n", __func__, offset, pfl->wcycle, pfl->cmd, value);
 
  reset_flash:
+    trace_pflash_reset();
     memory_region_rom_device_set_romd(&pfl->mem, true);
-
     pfl->wcycle = 0;
     pfl->cmd = 0;
 }
diff --git a/hw/block/pflash_cfi02.c b/hw/block/pflash_cfi02.c
index 6c18e5e578679417ce39b9b4d2cb47e875474efc..0f8b7b8c7b364dfd10c3a022922f6c01270ab2eb 100644
--- a/hw/block/pflash_cfi02.c
+++ b/hw/block/pflash_cfi02.c
@@ -43,6 +43,7 @@
 #include "sysemu/block-backend.h"
 #include "qemu/host-utils.h"
 #include "hw/sysbus.h"
+#include "trace.h"
 
 //#define PFLASH_DEBUG
 #ifdef PFLASH_DEBUG
@@ -124,7 +125,7 @@ static void pflash_timer (void *opaque)
 {
     pflash_t *pfl = opaque;
 
-    DPRINTF("%s: command %02x done\n", __func__, pfl->cmd);
+    trace_pflash_timer_expired(pfl->cmd);
     /* Reset flash */
     pfl->status ^= 0x80;
     if (pfl->bypass) {
@@ -143,8 +144,8 @@ static uint32_t pflash_read (pflash_t *pfl, hwaddr offset,
     uint32_t ret;
     uint8_t *p;
 
-    DPRINTF("%s: offset " TARGET_FMT_plx "\n", __func__, offset);
     ret = -1;
+    trace_pflash_read(offset, pfl->cmd, width, pfl->wcycle);
     /* Lazy reset to ROMD mode after a certain amount of read accesses */
     if (!pfl->rom_mode && pfl->wcycle == 0 &&
         ++pfl->read_counter > PFLASH_LAZY_ROMD_THRESHOLD) {
@@ -172,7 +173,7 @@ static uint32_t pflash_read (pflash_t *pfl, hwaddr offset,
         switch (width) {
         case 1:
             ret = p[offset];
-//            DPRINTF("%s: data offset %08x %02x\n", __func__, offset, ret);
+            trace_pflash_data_read8(offset, ret);
             break;
         case 2:
             if (be) {
@@ -182,7 +183,7 @@ static uint32_t pflash_read (pflash_t *pfl, hwaddr offset,
                 ret = p[offset];
                 ret |= p[offset + 1] << 8;
             }
-//            DPRINTF("%s: data offset %08x %04x\n", __func__, offset, ret);
+            trace_pflash_data_read16(offset, ret);
             break;
         case 4:
             if (be) {
@@ -196,7 +197,7 @@ static uint32_t pflash_read (pflash_t *pfl, hwaddr offset,
                 ret |= p[offset + 2] << 16;
                 ret |= p[offset + 3] << 24;
             }
-//            DPRINTF("%s: data offset %08x %08x\n", __func__, offset, ret);
+            trace_pflash_data_read32(offset, ret);
             break;
         }
         break;
@@ -274,8 +275,7 @@ static void pflash_write (pflash_t *pfl, hwaddr offset,
 #endif
         goto reset_flash;
     }
-    DPRINTF("%s: offset " TARGET_FMT_plx " %08x %d %d\n", __func__,
-            offset, value, width, pfl->wcycle);
+    trace_pflash_write(offset, value, width, pfl->wcycle);
     offset &= pfl->chip_len - 1;
 
     DPRINTF("%s: offset " TARGET_FMT_plx " %08x %d\n", __func__,
@@ -345,8 +345,7 @@ static void pflash_write (pflash_t *pfl, hwaddr offset,
             /* We need another unlock sequence */
             goto check_unlock0;
         case 0xA0:
-            DPRINTF("%s: write data offset " TARGET_FMT_plx " %08x %d\n",
-                    __func__, offset, value, width);
+            trace_pflash_data_write(offset, value, width, 0);
             p = pfl->storage;
             if (!pfl->ro) {
                 switch (width) {
@@ -483,6 +482,7 @@ static void pflash_write (pflash_t *pfl, hwaddr offset,
 
     /* Reset flash */
  reset_flash:
+    trace_pflash_reset();
     pfl->bypass = 0;
     pfl->wcycle = 0;
     pfl->cmd = 0;
diff --git a/hw/block/trace-events b/hw/block/trace-events
index 6b9e733412f2c2e0431c50aeb7f1e73a495e497f..335c092450795a43e41d469cf3f7e3283dcb15dc 100644
--- a/hw/block/trace-events
+++ b/hw/block/trace-events
@@ -1,5 +1,22 @@
 # See docs/devel/tracing.txt for syntax documentation.
 
+# hw/block/fdc.c
+fdc_ioport_read(uint8_t reg, uint8_t value) "read reg 0x%02x val 0x%02x"
+fdc_ioport_write(uint8_t reg, uint8_t value) "write reg 0x%02x val 0x%02x"
+
+# hw/block/pflash_cfi0?.c
+pflash_reset(void) "reset"
+pflash_read(uint64_t offset, uint8_t cmd, int width, uint8_t wcycle) "offset:0x%04"PRIx64" cmd:0x%02x width:%d wcycle:%u"
+pflash_write(uint64_t offset, uint32_t value, int width, uint8_t wcycle) "offset:0x%04"PRIx64" value:0x%03x width:%d wcycle:%u"
+pflash_timer_expired(uint8_t cmd) "command 0x%02x done"
+pflash_data_read8(uint64_t offset, uint32_t value) "data offset:0x%04"PRIx64" value:0x%02x"
+pflash_data_read16(uint64_t offset, uint32_t value) "data offset:0x%04"PRIx64" value:0x%04x"
+pflash_data_read32(uint64_t offset, uint32_t value) "data offset:0x%04"PRIx64" value:0x%08x"
+pflash_data_write(uint64_t offset, uint32_t value, int width, uint64_t counter) "data offset:0x%04"PRIx64" value:0x%08x width:%d counter:0x%016"PRIx64
+pflash_manufacturer_id(uint16_t id) "Read Manufacturer ID: 0x%04x"
+pflash_device_id(uint16_t id) "Read Device ID: 0x%04x"
+pflash_device_info(uint64_t offset) "Read Device Information offset:0x%04"PRIx64
+
 # hw/block/virtio-blk.c
 virtio_blk_req_complete(void *vdev, void *req, int status) "vdev %p req %p status %d"
 virtio_blk_rw_complete(void *vdev, void *req, int ret) "vdev %p req %p ret %d"
diff --git a/hw/char/parallel.c b/hw/char/parallel.c
index 35748e6c1b5747df9e4cc8fbcafa63968077f311..a80da47ecf567dc0ff1738c021204efadd5a17d0 100644
--- a/hw/char/parallel.c
+++ b/hw/char/parallel.c
@@ -30,6 +30,7 @@
 #include "hw/isa/isa.h"
 #include "hw/char/parallel.h"
 #include "sysemu/sysemu.h"
+#include "trace.h"
 
 //#define DEBUG_PARALLEL
 
@@ -110,9 +111,8 @@ parallel_ioport_write_sw(void *opaque, uint32_t addr, uint32_t val)
 {
     ParallelState *s = opaque;
 
-    pdebug("write addr=0x%02x val=0x%02x\n", addr, val);
-
     addr &= 7;
+    trace_parallel_ioport_write("SW", addr, val);
     switch(addr) {
     case PARA_REG_DATA:
         s->dataw = val;
@@ -157,6 +157,7 @@ static void parallel_ioport_write_hw(void *opaque, uint32_t addr, uint32_t val)
     s->last_read_offset = ~0U;
 
     addr &= 7;
+    trace_parallel_ioport_write("HW", addr, val);
     switch(addr) {
     case PARA_REG_DATA:
         if (s->dataw == val)
@@ -230,6 +231,8 @@ parallel_ioport_eppdata_write_hw2(void *opaque, uint32_t addr, uint32_t val)
     struct ParallelIOArg ioarg = {
         .buffer = &eppdata, .count = sizeof(eppdata)
     };
+
+    trace_parallel_ioport_write("EPP", addr, val);
     if ((s->control & (PARA_CTR_DIR|PARA_CTR_SIGNAL)) != PARA_CTR_INIT) {
         /* Controls not correct for EPP data cycle, so do nothing */
         pdebug("we%04x s\n", val);
@@ -253,6 +256,8 @@ parallel_ioport_eppdata_write_hw4(void *opaque, uint32_t addr, uint32_t val)
     struct ParallelIOArg ioarg = {
         .buffer = &eppdata, .count = sizeof(eppdata)
     };
+
+    trace_parallel_ioport_write("EPP", addr, val);
     if ((s->control & (PARA_CTR_DIR|PARA_CTR_SIGNAL)) != PARA_CTR_INIT) {
         /* Controls not correct for EPP data cycle, so do nothing */
         pdebug("we%08x s\n", val);
@@ -299,7 +304,7 @@ static uint32_t parallel_ioport_read_sw(void *opaque, uint32_t addr)
         ret = s->control;
         break;
     }
-    pdebug("read addr=0x%02x val=0x%02x\n", addr, ret);
+    trace_parallel_ioport_read("SW", addr, ret);
     return ret;
 }
 
@@ -371,6 +376,7 @@ static uint32_t parallel_ioport_read_hw(void *opaque, uint32_t addr)
         }
         break;
     }
+    trace_parallel_ioport_read("HW", addr, ret);
     s->last_read_offset = addr;
     return ret;
 }
@@ -399,6 +405,7 @@ parallel_ioport_eppdata_read_hw2(void *opaque, uint32_t addr)
     }
     else
         pdebug("re%04x\n", ret);
+    trace_parallel_ioport_read("EPP", addr, ret);
     return ret;
 }
 
@@ -426,11 +433,13 @@ parallel_ioport_eppdata_read_hw4(void *opaque, uint32_t addr)
     }
     else
         pdebug("re%08x\n", ret);
+    trace_parallel_ioport_read("EPP", addr, ret);
     return ret;
 }
 
 static void parallel_ioport_ecp_write(void *opaque, uint32_t addr, uint32_t val)
 {
+    trace_parallel_ioport_write("ECP", addr & 7, val);
     pdebug("wecp%d=%02x\n", addr & 7, val);
 }
 
@@ -438,6 +447,7 @@ static uint32_t parallel_ioport_ecp_read(void *opaque, uint32_t addr)
 {
     uint8_t ret = 0xff;
 
+    trace_parallel_ioport_read("ECP", addr & 7, ret);
     pdebug("recp%d:%02x\n", addr & 7, ret);
     return ret;
 }
diff --git a/hw/char/serial.c b/hw/char/serial.c
index 6de6c297791a0e38347cd0ea15a80f4d72f79259..cd7d747c684a007263fc52949c3a62bb419ff4f3 100644
--- a/hw/char/serial.c
+++ b/hw/char/serial.c
@@ -29,6 +29,7 @@
 #include "qapi/error.h"
 #include "qemu/timer.h"
 #include "qemu/error-report.h"
+#include "trace.h"
 
 //#define DEBUG_SERIAL
 
@@ -335,7 +336,7 @@ static void serial_ioport_write(void *opaque, hwaddr addr, uint64_t val,
     SerialState *s = opaque;
 
     addr &= 7;
-    DPRINTF("write addr=0x%" HWADDR_PRIx " val=0x%" PRIx64 "\n", addr, val);
+    trace_serial_ioport_write(addr, val);
     switch(addr) {
     default:
     case 0:
@@ -548,7 +549,7 @@ static uint64_t serial_ioport_read(void *opaque, hwaddr addr, unsigned size)
         ret = s->scr;
         break;
     }
-    DPRINTF("read addr=0x%" HWADDR_PRIx " val=0x%02x\n", addr, ret);
+    trace_serial_ioport_read(addr, ret);
     return ret;
 }
 
diff --git a/hw/char/trace-events b/hw/char/trace-events
index ebd8a92450fa0ebeb4447cbf87ac9a6248963834..b64213d4dd11e6630e1587d62f847b73fb2062da 100644
--- a/hw/char/trace-events
+++ b/hw/char/trace-events
@@ -1,5 +1,13 @@
 # See docs/devel/tracing.txt for syntax documentation.
 
+# hw/char/parallel.c
+parallel_ioport_read(const char *desc, uint16_t addr, uint8_t value) "read [%s] addr 0x%02x val 0x%02x"
+parallel_ioport_write(const char *desc, uint16_t addr, uint8_t value) "write [%s] addr 0x%02x val 0x%02x"
+
+# hw/char/serial.c
+serial_ioport_read(uint16_t addr, uint8_t value) "read addr 0x%02x val 0x%02x"
+serial_ioport_write(uint16_t addr, uint8_t value) "write addr 0x%02x val 0x%02x"
+
 # hw/char/virtio-serial-bus.c
 virtio_serial_send_control_event(unsigned int port, uint16_t event, uint16_t value) "port %u, event %u, value %u"
 virtio_serial_throttle_port(unsigned int port, bool throttle) "port %u, throttle %d"
diff --git a/hw/input/trace-events b/hw/input/trace-events
index db72484a25264ef28c1a5980f3adfd1156a5d882..3965a842aee564add0ea53d81228e11783ecac7b 100644
--- a/hw/input/trace-events
+++ b/hw/input/trace-events
@@ -41,5 +41,8 @@ milkymist_softusb_pulse_irq(void) "Pulse IRQ"
 hid_kbd_queue_full(void) "queue full"
 hid_kbd_queue_empty(void) "queue empty"
 
+# hw/input/tsc2005.c
+tsc2005_sense(const char *state) "touchscreen sense %s"
+
 # hw/input/virtio
 virtio_input_queue_full(void) "queue full"
diff --git a/hw/input/tsc2005.c b/hw/input/tsc2005.c
index 4dd95596ab7421eba4a1a5a9ef813ffb698351ac..2b9108a193285c34866de2df32989d1b6819f220 100644
--- a/hw/input/tsc2005.c
+++ b/hw/input/tsc2005.c
@@ -24,6 +24,7 @@
 #include "qemu/timer.h"
 #include "ui/console.h"
 #include "hw/devices.h"
+#include "trace.h"
 
 #define TSC_CUT_RESOLUTION(value, p)	((value) >> (16 - (p ? 12 : 10)))
 
@@ -201,8 +202,7 @@ static void tsc2005_write(TSC2005State *s, int reg, uint16_t data)
         s->host_mode = (data >> 15) != 0;
         if (s->enabled != !(data & 0x4000)) {
             s->enabled = !(data & 0x4000);
-            fprintf(stderr, "%s: touchscreen sense %sabled\n",
-                            __func__, s->enabled ? "en" : "dis");
+            trace_tsc2005_sense(s->enabled ? "enabled" : "disabled");
             if (s->busy && !s->enabled)
                 timer_del(s->timer);
             s->busy = s->busy && s->enabled;
@@ -340,8 +340,7 @@ static uint8_t tsc2005_txrx_word(void *opaque, uint8_t value)
                 s->nextprecision = (value >> 2) & 1;
                 if (s->enabled != !(value & 1)) {
                     s->enabled = !(value & 1);
-                    fprintf(stderr, "%s: touchscreen sense %sabled\n",
-                                    __func__, s->enabled ? "en" : "dis");
+                    trace_tsc2005_sense(s->enabled ? "enabled" : "disabled");
                     if (s->busy && !s->enabled)
                         timer_del(s->timer);
                     s->busy = s->busy && s->enabled;
diff --git a/hw/net/etraxfs_eth.c b/hw/net/etraxfs_eth.c
index 013c8d0a4103b60b9db46cced364df6f15e06bab..a6932432b164876fdd9b8e3e2fb9734deb64bd23 100644
--- a/hw/net/etraxfs_eth.c
+++ b/hw/net/etraxfs_eth.c
@@ -27,6 +27,7 @@
 #include "net/net.h"
 #include "hw/cris/etraxfs.h"
 #include "qemu/error-report.h"
+#include "trace.h"
 
 #define D(x)
 
@@ -106,7 +107,7 @@ static unsigned int tdk_read(struct qemu_phy *phy, unsigned int req)
         r = phy->regs[regnum];
         break;
     }
-    D(printf("\n%s %x = reg[%d]\n", __func__, r, regnum));
+    trace_mdio_phy_read(regnum, r);
     return r;
 }
 
@@ -116,7 +117,7 @@ tdk_write(struct qemu_phy *phy, unsigned int req, unsigned int data)
     int regnum;
 
     regnum = req & 0x1f;
-    D(printf("%s reg[%d] = %x\n", __func__, regnum, data));
+    trace_mdio_phy_write(regnum, data);
     switch (regnum) {
     default:
         phy->regs[regnum] = data;
@@ -206,8 +207,7 @@ static void mdio_cycle(struct qemu_mdio *bus)
 {
     bus->cnt++;
 
-    D(printf("mdc=%d mdio=%d state=%d cnt=%d drv=%d\n",
-        bus->mdc, bus->mdio, bus->state, bus->cnt, bus->drive));
+    trace_mdio_bitbang(bus->mdc, bus->mdio, bus->state, bus->cnt, bus->drive);
 #if 0
     if (bus->mdc) {
         printf("%d", bus->mdio);
diff --git a/hw/net/ne2000.c b/hw/net/ne2000.c
index 3a9fc89e484b6e6db817adfa5342b00eacb8743e..07d79e317f9e1ba430209bf53d28593651181a12 100644
--- a/hw/net/ne2000.c
+++ b/hw/net/ne2000.c
@@ -26,6 +26,7 @@
 #include "net/eth.h"
 #include "ne2000.h"
 #include "sysemu/sysemu.h"
+#include "trace.h"
 
 /* debug NE2000 card */
 //#define DEBUG_NE2000
@@ -276,9 +277,7 @@ static void ne2000_ioport_write(void *opaque, uint32_t addr, uint32_t val)
     int offset, page, index;
 
     addr &= 0xf;
-#ifdef DEBUG_NE2000
-    printf("NE2000: write addr=0x%x val=0x%02x\n", addr, val);
-#endif
+    trace_ne2000_ioport_write(addr, val);
     if (addr == E8390_CMD) {
         /* control register */
         s->cmd = val;
@@ -441,9 +440,7 @@ static uint32_t ne2000_ioport_read(void *opaque, uint32_t addr)
             break;
         }
     }
-#ifdef DEBUG_NE2000
-    printf("NE2000: read addr=0x%x val=%02x\n", addr, ret);
-#endif
+    trace_ne2000_ioport_read(addr, ret);
     return ret;
 }
 
@@ -662,19 +659,24 @@ static uint64_t ne2000_read(void *opaque, hwaddr addr,
                             unsigned size)
 {
     NE2000State *s = opaque;
+    uint64_t val;
 
     if (addr < 0x10 && size == 1) {
-        return ne2000_ioport_read(s, addr);
+        val = ne2000_ioport_read(s, addr);
     } else if (addr == 0x10) {
         if (size <= 2) {
-            return ne2000_asic_ioport_read(s, addr);
+            val = ne2000_asic_ioport_read(s, addr);
         } else {
-            return ne2000_asic_ioport_readl(s, addr);
+            val = ne2000_asic_ioport_readl(s, addr);
         }
     } else if (addr == 0x1f && size == 1) {
-        return ne2000_reset_ioport_read(s, addr);
+        val = ne2000_reset_ioport_read(s, addr);
+    } else {
+        val = ((uint64_t)1 << (size * 8)) - 1;
     }
-    return ((uint64_t)1 << (size * 8)) - 1;
+    trace_ne2000_read(addr, val);
+
+    return val;
 }
 
 static void ne2000_write(void *opaque, hwaddr addr,
@@ -682,6 +684,7 @@ static void ne2000_write(void *opaque, hwaddr addr,
 {
     NE2000State *s = opaque;
 
+    trace_ne2000_write(addr, data);
     if (addr < 0x10 && size == 1) {
         ne2000_ioport_write(s, addr, data);
     } else if (addr == 0x10) {
diff --git a/hw/net/trace-events b/hw/net/trace-events
index 45c4e9fba0c1a9234dd88c39257bd089c37309e2..663bea1b7484e005c252d1c8abc885457658ef0a 100644
--- a/hw/net/trace-events
+++ b/hw/net/trace-events
@@ -1,5 +1,10 @@
 # See docs/devel/tracing.txt for syntax documentation.
 
+# hw/net/etraxfs_eth.c
+mdio_phy_read(int regnum, uint16_t value) "read phy_reg:%d value:0x%04x"
+mdio_phy_write(int regnum, uint16_t value) "write phy_reg:%d value:0x%04x"
+mdio_bitbang(bool mdc, bool mdio, int state, uint16_t cnt, unsigned int drive) "bitbang mdc=%u mdio=%u state=%d cnt=%u drv=%d"
+
 # hw/net/lance.c
 lance_mem_readw(uint64_t addr, uint32_t ret) "addr=0x%"PRIx64"val=0x%04x"
 lance_mem_writew(uint64_t addr, uint32_t val) "addr=0x%"PRIx64"val=0x%04x"
@@ -23,6 +28,12 @@ mipsnet_read(uint64_t addr, uint32_t val) "read addr=0x%" PRIx64 " val=0x%x"
 mipsnet_write(uint64_t addr, uint64_t val) "write addr=0x%" PRIx64 " val=0x%" PRIx64
 mipsnet_irq(uint32_t isr, uint32_t intctl) "set irq to %d (0x%02x)"
 
+# hw/net/ne2000.c
+ne2000_read(uint64_t addr, uint64_t val) "read addr=0x%" PRIx64 " val=0x%" PRIx64
+ne2000_write(uint64_t addr, uint64_t val) "write addr=0x%" PRIx64 " val=0x%" PRIx64
+ne2000_ioport_read(uint64_t addr, uint64_t val) "io read addr=0x%02" PRIx64 " val=0x%02" PRIx64
+ne2000_ioport_write(uint64_t addr, uint64_t val) "io write addr=0x%02" PRIx64 " val=0x%02" PRIx64
+
 # hw/net/opencores_eth.c
 open_eth_mii_write(unsigned idx, uint16_t v) "MII[0x%02x] <- 0x%04x"
 open_eth_mii_read(unsigned idx, uint16_t v) "MII[0x%02x] -> 0x%04x"
diff --git a/hw/sd/trace-events b/hw/sd/trace-events
index 43cffab8b1751c6c3ae94edde781086e44d259ff..fb0615cd3c75367212ffade827c03b3706f71e2a 100644
--- a/hw/sd/trace-events
+++ b/hw/sd/trace-events
@@ -37,7 +37,7 @@ sdcard_powerup(void) ""
 sdcard_inquiry_cmd41(void) ""
 sdcard_set_enable(bool current_state, bool new_state) "%u -> %u"
 sdcard_reset(void) ""
-sdcard_set_blocklen(uint16_t length) "0x%04x"
+sdcard_set_blocklen(uint16_t length) "0x%03x"
 sdcard_inserted(bool readonly) "read_only: %u"
 sdcard_ejected(void) ""
 sdcard_erase(void) ""
diff --git a/scripts/simpletrace.py b/scripts/simpletrace.py
index d4a50a1e2b989978732538c88ac355530e7d065e..4ad34f90cd55a78b2a9c802161b390fdcd31ad95 100755
--- a/scripts/simpletrace.py
+++ b/scripts/simpletrace.py
@@ -70,7 +70,7 @@ def get_record(edict, idtoname, rechdr, fobj):
 def get_mapping(fobj):
     (event_id, ) = struct.unpack('=Q', fobj.read(8))
     (len, ) = struct.unpack('=L', fobj.read(4))
-    name = fobj.read(len)
+    name = fobj.read(len).decode()
 
     return (event_id, name)
 
diff --git a/scripts/tracetool/backend/log.py b/scripts/tracetool/backend/log.py
index 78933d03ad39648263e1a1e8865b943e877b77ae..6751f41bc5a641e37dc460055bd0d1e5920d2472 100644
--- a/scripts/tracetool/backend/log.py
+++ b/scripts/tracetool/backend/log.py
@@ -38,7 +38,7 @@ def generate_h(event, group):
     out('    if (%(cond)s && qemu_loglevel_mask(LOG_TRACE)) {',
         '        struct timeval _now;',
         '        gettimeofday(&_now, NULL);',
-        '        qemu_log("%%d@%%zd.%%06zd:%(name)s " %(fmt)s "\\n",',
+        '        qemu_log("%%d@%%zu.%%06zu:%(name)s " %(fmt)s "\\n",',
         '                 getpid(),',
         '                 (size_t)_now.tv_sec, (size_t)_now.tv_usec',
         '                 %(argnames)s);',