diff --git a/hw/sd/sd.c b/hw/sd/sd.c
index bb149aa644..dc50d6bbf7 100644
--- a/hw/sd/sd.c
+++ b/hw/sd/sd.c
@@ -120,6 +120,7 @@ struct SDState {
     qemu_irq readonly_cb;
     qemu_irq inserted_cb;
     QEMUTimer *ocr_power_timer;
+    const char *proto_name;
     bool enable;
     uint8_t dat_lines;
     bool cmd_line;
@@ -875,7 +876,8 @@ static sd_rsp_type_t sd_normal_command(SDState *sd, SDRequest req)
      * However there is no ACMD55, so we want to trace this particular case.
      */
     if (req.cmd != 55 || sd->expecting_acmd) {
-        trace_sdcard_normal_command(sd_cmd_name(req.cmd), req.cmd,
+        trace_sdcard_normal_command(sd->proto_name,
+                                    sd_cmd_name(req.cmd), req.cmd,
                                     req.arg, sd_state_name(sd->state));
     }
 
@@ -1455,7 +1457,7 @@ static sd_rsp_type_t sd_normal_command(SDState *sd, SDRequest req)
 static sd_rsp_type_t sd_app_command(SDState *sd,
                                     SDRequest req)
 {
-    trace_sdcard_app_command(sd_acmd_name(req.cmd),
+    trace_sdcard_app_command(sd->proto_name, sd_acmd_name(req.cmd),
                              req.cmd, req.arg, sd_state_name(sd->state));
     sd->card_status |= APP_CMD;
     switch (req.cmd) {
@@ -1771,7 +1773,8 @@ void sd_write_data(SDState *sd, uint8_t value)
     if (sd->card_status & (ADDRESS_ERROR | WP_VIOLATION))
         return;
 
-    trace_sdcard_write_data(sd_acmd_name(sd->current_cmd),
+    trace_sdcard_write_data(sd->proto_name,
+                            sd_acmd_name(sd->current_cmd),
                             sd->current_cmd, value);
     switch (sd->current_cmd) {
     case 24:	/* CMD24:  WRITE_SINGLE_BLOCK */
@@ -1910,7 +1913,8 @@ uint8_t sd_read_data(SDState *sd)
 
     io_len = (sd->ocr & (1 << 30)) ? 512 : sd->blk_len;
 
-    trace_sdcard_read_data(sd_acmd_name(sd->current_cmd),
+    trace_sdcard_read_data(sd->proto_name,
+                           sd_acmd_name(sd->current_cmd),
                            sd->current_cmd, io_len);
     switch (sd->current_cmd) {
     case 6:	/* CMD6:   SWITCH_FUNCTION */
@@ -2037,6 +2041,8 @@ static void sd_realize(DeviceState *dev, Error **errp)
     SDState *sd = SD_CARD(dev);
     int ret;
 
+    sd->proto_name = sd->spi ? "SPI" : "SD";
+
     if (sd->blk && blk_is_read_only(sd->blk)) {
         error_setg(errp, "Cannot use read-only drive as SD card");
         return;
diff --git a/hw/sd/trace-events b/hw/sd/trace-events
index cdddca3dbf..2059ace61f 100644
--- a/hw/sd/trace-events
+++ b/hw/sd/trace-events
@@ -24,8 +24,8 @@ sdhci_write_dataport(uint16_t data_count) "write buffer filled with %u bytes of
 sdhci_capareg(const char *desc, uint16_t val) "%s: %u"
 
 # hw/sd/sd.c
-sdcard_normal_command(const char *cmd_desc, uint8_t cmd, uint32_t arg, const char *state) "%20s/ CMD%02d arg 0x%08x (state %s)"
-sdcard_app_command(const char *acmd_desc, uint8_t acmd, uint32_t arg, const char *state) "%23s/ACMD%02d arg 0x%08x (state %s)"
+sdcard_normal_command(const char *proto, const char *cmd_desc, uint8_t cmd, uint32_t arg, const char *state) "%s %20s/ CMD%02d arg 0x%08x (state %s)"
+sdcard_app_command(const char *proto, const char *acmd_desc, uint8_t acmd, uint32_t arg, const char *state) "%s %23s/ACMD%02d arg 0x%08x (state %s)"
 sdcard_response(const char *rspdesc, int rsplen) "%s (sz:%d)"
 sdcard_powerup(void) ""
 sdcard_inquiry_cmd41(void) ""
@@ -39,8 +39,8 @@ sdcard_lock(void) ""
 sdcard_unlock(void) ""
 sdcard_read_block(uint64_t addr, uint32_t len) "addr 0x%" PRIx64 " size 0x%x"
 sdcard_write_block(uint64_t addr, uint32_t len) "addr 0x%" PRIx64 " size 0x%x"
-sdcard_write_data(const char *cmd_desc, uint8_t cmd, uint8_t value) "%20s/ CMD%02d value 0x%02x"
-sdcard_read_data(const char *cmd_desc, uint8_t cmd, int length) "%20s/ CMD%02d len %d"
+sdcard_write_data(const char *proto, const char *cmd_desc, uint8_t cmd, uint8_t value) "%s %20s/ CMD%02d value 0x%02x"
+sdcard_read_data(const char *proto, const char *cmd_desc, uint8_t cmd, int length) "%s %20s/ CMD%02d len %d"
 sdcard_set_voltage(uint16_t millivolts) "%u mV"
 
 # hw/sd/milkymist-memcard.c