diff --git a/block_int.h b/block_int.h
index 1a7240c..767cd29 100644
--- a/block_int.h
+++ b/block_int.h
@@ -231,12 +231,12 @@ static inline unsigned int get_physical_block_exp(BlockConf *conf)
 }
 
 #define DEFINE_BLOCK_PROPERTIES(_state, _conf)                          \
-    DEFINE_PROP_DRIVE("drive", _state, _conf.dinfo),                    \
+    DEFINE_PROP_DRIVE("drive", _state, _conf.dinfo, ""),                \
     DEFINE_PROP_UINT16("logical_block_size", _state,                    \
-                       _conf.logical_block_size, 512),                  \
+                       _conf.logical_block_size, 512, ""),              \
     DEFINE_PROP_UINT16("physical_block_size", _state,                   \
-                       _conf.physical_block_size, 512),                 \
-    DEFINE_PROP_UINT16("min_io_size", _state, _conf.min_io_size, 512),  \
-    DEFINE_PROP_UINT32("opt_io_size", _state, _conf.opt_io_size, 512)
+                       _conf.physical_block_size, 512, ""),             \
+    DEFINE_PROP_UINT16("min_io_size", _state, _conf.min_io_size, 512, ""), \
+    DEFINE_PROP_UINT32("opt_io_size", _state, _conf.opt_io_size, 512, "")
 
 #endif /* BLOCK_INT_H */
diff --git a/hw/a9mpcore.c b/hw/a9mpcore.c
index b5e5328..174f5d5 100644
--- a/hw/a9mpcore.c
+++ b/hw/a9mpcore.c
@@ -16,7 +16,7 @@ static SysBusDeviceInfo mpcore_priv_info = {
     .qdev.name  = "a9mpcore_priv",
     .qdev.size  = sizeof(mpcore_priv_state),
     .qdev.props = (Property[]) {
-        DEFINE_PROP_UINT32("num-cpu", mpcore_priv_state, num_cpu, 1),
+        DEFINE_PROP_UINT32("num-cpu", mpcore_priv_state, num_cpu, 1, ""),
         DEFINE_PROP_END_OF_LIST(),
     }
 };
diff --git a/hw/acpi_piix4.c b/hw/acpi_piix4.c
index 0fce958..fa65cc2 100644
--- a/hw/acpi_piix4.c
+++ b/hw/acpi_piix4.c
@@ -410,7 +410,7 @@ static PCIDeviceInfo piix4_pm_info = {
     .init               = piix4_pm_initfn,
     .config_write       = pm_write_config,
     .qdev.props         = (Property[]) {
-        DEFINE_PROP_UINT32("smb_io_base", PIIX4PMState, smb_io_base, 0),
+        DEFINE_PROP_UINT32("smb_io_base", PIIX4PMState, smb_io_base, 0, ""),
         DEFINE_PROP_END_OF_LIST(),
     }
 };
diff --git a/hw/arm11mpcore.c b/hw/arm11mpcore.c
index 3bbd885..a3a7a9d 100644
--- a/hw/arm11mpcore.c
+++ b/hw/arm11mpcore.c
@@ -88,7 +88,7 @@ static SysBusDeviceInfo mpcore_rirq_info = {
     .qdev.name  = "realview_mpcore",
     .qdev.size  = sizeof(mpcore_rirq_state),
     .qdev.props = (Property[]) {
-        DEFINE_PROP_UINT32("num-cpu", mpcore_rirq_state, num_cpu, 1),
+        DEFINE_PROP_UINT32("num-cpu", mpcore_rirq_state, num_cpu, 1, ""),
         DEFINE_PROP_END_OF_LIST(),
     }
 };
@@ -98,7 +98,7 @@ static SysBusDeviceInfo mpcore_priv_info = {
     .qdev.name  = "arm11mpcore_priv",
     .qdev.size  = sizeof(mpcore_priv_state),
     .qdev.props = (Property[]) {
-        DEFINE_PROP_UINT32("num-cpu", mpcore_priv_state, num_cpu, 1),
+        DEFINE_PROP_UINT32("num-cpu", mpcore_priv_state, num_cpu, 1, ""),
         DEFINE_PROP_END_OF_LIST(),
     }
 };
diff --git a/hw/arm_sysctl.c b/hw/arm_sysctl.c
index 0cb2ffc..b35d269 100644
--- a/hw/arm_sysctl.c
+++ b/hw/arm_sysctl.c
@@ -232,8 +232,8 @@ static SysBusDeviceInfo arm_sysctl_info = {
     .qdev.size  = sizeof(arm_sysctl_state),
     .qdev.reset = arm_sysctl_reset,
     .qdev.props = (Property[]) {
-        DEFINE_PROP_UINT32("sys_id", arm_sysctl_state, sys_id, 0),
-        DEFINE_PROP_UINT32("proc_id", arm_sysctl_state, proc_id, 0),
+        DEFINE_PROP_UINT32("sys_id", arm_sysctl_state, sys_id, 0, ""),
+        DEFINE_PROP_UINT32("proc_id", arm_sysctl_state, proc_id, 0, ""),
         DEFINE_PROP_END_OF_LIST(),
     }
 };
diff --git a/hw/armv7m.c b/hw/armv7m.c
index 854261d..9f8f2a0 100644
--- a/hw/armv7m.c
+++ b/hw/armv7m.c
@@ -247,7 +247,7 @@ static SysBusDeviceInfo bitband_info = {
     .qdev.name  = "ARM,bitband-memory",
     .qdev.size  = sizeof(BitBandState),
     .qdev.props = (Property[]) {
-        DEFINE_PROP_UINT32("base", BitBandState, base, 0),
+        DEFINE_PROP_UINT32("base", BitBandState, base, 0, ""),
         DEFINE_PROP_END_OF_LIST(),
     }
 };
diff --git a/hw/cs4231a.c b/hw/cs4231a.c
index 4d5ce5c..330dd4a 100644
--- a/hw/cs4231a.c
+++ b/hw/cs4231a.c
@@ -671,9 +671,9 @@ static ISADeviceInfo cs4231a_info = {
     .qdev.vmsd     = &vmstate_cs4231a,
     .init          = cs4231a_initfn,
     .qdev.props    = (Property[]) {
-        DEFINE_PROP_HEX32  ("iobase",  CSState, port, 0x534),
-        DEFINE_PROP_UINT32 ("irq",     CSState, irq,  9),
-        DEFINE_PROP_UINT32 ("dma",     CSState, dma,  3),
+        DEFINE_PROP_HEX32  ("iobase",  CSState, port, 0x534, ""),
+        DEFINE_PROP_UINT32 ("irq",     CSState, irq,  9,     ""),
+        DEFINE_PROP_UINT32 ("dma",     CSState, dma,  3,     ""),
         DEFINE_PROP_END_OF_LIST (),
     },
 };
diff --git a/hw/debugcon.c b/hw/debugcon.c
index 5ee6821..a1e06ee 100644
--- a/hw/debugcon.c
+++ b/hw/debugcon.c
@@ -92,9 +92,9 @@ static ISADeviceInfo debugcon_isa_info = {
     .qdev.size  = sizeof(ISADebugconState),
     .init       = debugcon_isa_initfn,
     .qdev.props = (Property[]) {
-        DEFINE_PROP_HEX32("iobase", ISADebugconState, iobase, 0xe9),
-        DEFINE_PROP_CHR("chardev",  ISADebugconState, state.chr),
-        DEFINE_PROP_HEX32("readback", ISADebugconState, state.readback, 0xe9),
+        DEFINE_PROP_HEX32("iobase", ISADebugconState, iobase, 0xe9, ""),
+        DEFINE_PROP_CHR("chardev",  ISADebugconState, state.chr, ""),
+        DEFINE_PROP_HEX32("readback", ISADebugconState, state.readback, 0xe9, ""),
         DEFINE_PROP_END_OF_LIST(),
     },
 };
diff --git a/hw/eccmemctl.c b/hw/eccmemctl.c
index 498c61a..442a695 100644
--- a/hw/eccmemctl.c
+++ b/hw/eccmemctl.c
@@ -324,7 +324,7 @@ static SysBusDeviceInfo ecc_info = {
     .qdev.vmsd  = &vmstate_ecc,
     .qdev.reset = ecc_reset,
     .qdev.props = (Property[]) {
-        DEFINE_PROP_HEX32("version", ECCState, version, -1),
+        DEFINE_PROP_HEX32("version", ECCState, version, -1, ""),
         DEFINE_PROP_END_OF_LIST(),
     }
 };
diff --git a/hw/escc.c b/hw/escc.c
index 6d2fd36..adda135 100644
--- a/hw/escc.c
+++ b/hw/escc.c
@@ -932,14 +932,14 @@ static SysBusDeviceInfo escc_info = {
     .qdev.vmsd  = &vmstate_escc,
     .qdev.reset = escc_reset,
     .qdev.props = (Property[]) {
-        DEFINE_PROP_UINT32("frequency", SerialState, frequency,   0),
-        DEFINE_PROP_UINT32("it_shift",  SerialState, it_shift,    0),
-        DEFINE_PROP_UINT32("disabled",  SerialState, disabled,    0),
-        DEFINE_PROP_UINT32("disabled",  SerialState, disabled,    0),
-        DEFINE_PROP_UINT32("chnBtype",  SerialState, chn[0].type, 0),
-        DEFINE_PROP_UINT32("chnAtype",  SerialState, chn[1].type, 0),
-        DEFINE_PROP_CHR("chrB", SerialState, chn[0].chr),
-        DEFINE_PROP_CHR("chrA", SerialState, chn[1].chr),
+        DEFINE_PROP_UINT32("frequency", SerialState, frequency,   0, ""),
+        DEFINE_PROP_UINT32("it_shift",  SerialState, it_shift,    0, ""),
+        DEFINE_PROP_UINT32("disabled",  SerialState, disabled,    0, ""),
+        DEFINE_PROP_UINT32("disabled",  SerialState, disabled,    0, ""),
+        DEFINE_PROP_UINT32("chnBtype",  SerialState, chn[0].type, 0, ""),
+        DEFINE_PROP_UINT32("chnAtype",  SerialState, chn[1].type, 0, ""),
+        DEFINE_PROP_CHR("chrB", SerialState, chn[0].chr, ""),
+        DEFINE_PROP_CHR("chrA", SerialState, chn[1].chr, ""),
         DEFINE_PROP_END_OF_LIST(),
     }
 };
diff --git a/hw/etraxfs_pic.c b/hw/etraxfs_pic.c
index b2c4859..3cb6638 100644
--- a/hw/etraxfs_pic.c
+++ b/hw/etraxfs_pic.c
@@ -155,7 +155,8 @@ static SysBusDeviceInfo etraxfs_pic_info = {
     .qdev.name  = "etraxfs,pic",
     .qdev.size  = sizeof(struct etrax_pic),
     .qdev.props = (Property[]) {
-        DEFINE_PROP_PTR("interrupt_vector", struct etrax_pic, interrupt_vector),
+        DEFINE_PROP_PTR("interrupt_vector", struct etrax_pic, interrupt_vector,
+                        ""),
         DEFINE_PROP_END_OF_LIST(),
     }
 };
diff --git a/hw/fdc.c b/hw/fdc.c
index 6306496..2ecfc47 100644
--- a/hw/fdc.c
+++ b/hw/fdc.c
@@ -2031,8 +2031,8 @@ static ISADeviceInfo isa_fdc_info = {
     .qdev.vmsd  = &vmstate_isa_fdc,
     .qdev.reset = fdctrl_external_reset_isa,
     .qdev.props = (Property[]) {
-        DEFINE_PROP_DRIVE("driveA", FDCtrlISABus, state.drives[0].dinfo),
-        DEFINE_PROP_DRIVE("driveB", FDCtrlISABus, state.drives[1].dinfo),
+        DEFINE_PROP_DRIVE("driveA", FDCtrlISABus, state.drives[0].dinfo, ""),
+        DEFINE_PROP_DRIVE("driveB", FDCtrlISABus, state.drives[1].dinfo, ""),
         DEFINE_PROP_END_OF_LIST(),
     },
 };
@@ -2054,8 +2054,8 @@ static SysBusDeviceInfo sysbus_fdc_info = {
     .qdev.vmsd  = &vmstate_sysbus_fdc,
     .qdev.reset = fdctrl_external_reset_sysbus,
     .qdev.props = (Property[]) {
-        DEFINE_PROP_DRIVE("driveA", FDCtrlSysBus, state.drives[0].dinfo),
-        DEFINE_PROP_DRIVE("driveB", FDCtrlSysBus, state.drives[1].dinfo),
+        DEFINE_PROP_DRIVE("driveA", FDCtrlSysBus, state.drives[0].dinfo, ""),
+        DEFINE_PROP_DRIVE("driveB", FDCtrlSysBus, state.drives[1].dinfo, ""),
         DEFINE_PROP_END_OF_LIST(),
     },
 };
@@ -2067,7 +2067,7 @@ static SysBusDeviceInfo sun4m_fdc_info = {
     .qdev.vmsd  = &vmstate_sysbus_fdc,
     .qdev.reset = fdctrl_external_reset_sysbus,
     .qdev.props = (Property[]) {
-        DEFINE_PROP_DRIVE("drive", FDCtrlSysBus, state.drives[0].dinfo),
+        DEFINE_PROP_DRIVE("drive", FDCtrlSysBus, state.drives[0].dinfo, ""),
         DEFINE_PROP_END_OF_LIST(),
     },
 };
diff --git a/hw/gus.c b/hw/gus.c
index e9016d8..2c37ff9 100644
--- a/hw/gus.c
+++ b/hw/gus.c
@@ -303,10 +303,10 @@ static ISADeviceInfo gus_info = {
     .qdev.vmsd     = &vmstate_gus,
     .init          = gus_initfn,
     .qdev.props    = (Property[]) {
-        DEFINE_PROP_UINT32 ("freq",    GUSState, freq,        44100),
-        DEFINE_PROP_HEX32  ("iobase",  GUSState, port,        0x240),
-        DEFINE_PROP_UINT32 ("irq",     GUSState, emu.gusirq,  7),
-        DEFINE_PROP_UINT32 ("dma",     GUSState, emu.gusdma,  3),
+        DEFINE_PROP_UINT32 ("freq",    GUSState, freq,        44100, ""),
+        DEFINE_PROP_HEX32  ("iobase",  GUSState, port,        0x240, ""),
+        DEFINE_PROP_UINT32 ("irq",     GUSState, emu.gusirq,  7,     ""),
+        DEFINE_PROP_UINT32 ("dma",     GUSState, emu.gusdma,  3,     ""),
         DEFINE_PROP_END_OF_LIST (),
     },
 };
diff --git a/hw/i2c.c b/hw/i2c.c
index bee8e88..8e54c25 100644
--- a/hw/i2c.c
+++ b/hw/i2c.c
@@ -21,7 +21,7 @@ static struct BusInfo i2c_bus_info = {
     .name = "I2C",
     .size = sizeof(i2c_bus),
     .props = (Property[]) {
-        DEFINE_PROP_UINT8("address", struct i2c_slave, address, 0),
+        DEFINE_PROP_UINT8("address", struct i2c_slave, address, 0, ""),
         DEFINE_PROP_END_OF_LIST(),
     }
 };
diff --git a/hw/ide/cmd646.c b/hw/ide/cmd646.c
index cdcc9bf..885a460 100644
--- a/hw/ide/cmd646.c
+++ b/hw/ide/cmd646.c
@@ -286,7 +286,7 @@ static PCIDeviceInfo cmd646_ide_info[] = {
         .qdev.size    = sizeof(PCIIDEState),
         .init         = pci_cmd646_ide_initfn,
         .qdev.props   = (Property[]) {
-            DEFINE_PROP_UINT32("secondary", PCIIDEState, secondary, 0),
+            DEFINE_PROP_UINT32("secondary", PCIIDEState, secondary, 0, ""),
             DEFINE_PROP_END_OF_LIST(),
         },
     },{
diff --git a/hw/ide/isa.c b/hw/ide/isa.c
index dff7c79..b2de3db 100644
--- a/hw/ide/isa.c
+++ b/hw/ide/isa.c
@@ -102,9 +102,9 @@ static ISADeviceInfo isa_ide_info = {
     .init       = isa_ide_initfn,
     .qdev.reset = isa_ide_reset,
     .qdev.props = (Property[]) {
-        DEFINE_PROP_HEX32("iobase",  ISAIDEState, iobase,  0x1f0),
-        DEFINE_PROP_HEX32("iobase2", ISAIDEState, iobase2, 0x3f6),
-        DEFINE_PROP_UINT32("irq",    ISAIDEState, isairq,  14),
+        DEFINE_PROP_HEX32("iobase",  ISAIDEState, iobase,  0x1f0, ""),
+        DEFINE_PROP_HEX32("iobase2", ISAIDEState, iobase2, 0x3f6, ""),
+        DEFINE_PROP_UINT32("irq",    ISAIDEState, isairq,  14, ""),
         DEFINE_PROP_END_OF_LIST(),
     },
 };
diff --git a/hw/ide/qdev.c b/hw/ide/qdev.c
index b18693d..d71c2a1 100644
--- a/hw/ide/qdev.c
+++ b/hw/ide/qdev.c
@@ -109,9 +109,9 @@ static IDEDeviceInfo ide_drive_info = {
     .qdev.size  = sizeof(IDEDrive),
     .init       = ide_drive_initfn,
     .qdev.props = (Property[]) {
-        DEFINE_PROP_UINT32("unit", IDEDrive, dev.unit, -1),
+        DEFINE_PROP_UINT32("unit", IDEDrive, dev.unit, -1, ""),
         DEFINE_BLOCK_PROPERTIES(IDEDrive, dev.conf),
-        DEFINE_PROP_STRING("ver",  IDEDrive, dev.version),
+        DEFINE_PROP_STRING("ver",  IDEDrive, dev.version, ""),
         DEFINE_PROP_END_OF_LIST(),
     }
 };
diff --git a/hw/integratorcp.c b/hw/integratorcp.c
index bee8298..3492f03 100644
--- a/hw/integratorcp.c
+++ b/hw/integratorcp.c
@@ -528,7 +528,7 @@ static SysBusDeviceInfo core_info = {
     .qdev.name  = "integrator_core",
     .qdev.size  = sizeof(integratorcm_state),
     .qdev.props = (Property[]) {
-        DEFINE_PROP_UINT32("memsz", integratorcm_state, memsz, 0),
+        DEFINE_PROP_UINT32("memsz", integratorcm_state, memsz, 0, ""),
         DEFINE_PROP_END_OF_LIST(),
     }
 };
diff --git a/hw/lance.c b/hw/lance.c
index b6b04dd..c64bf36 100644
--- a/hw/lance.c
+++ b/hw/lance.c
@@ -151,7 +151,7 @@ static SysBusDeviceInfo lance_info = {
     .qdev.reset = lance_reset,
     .qdev.vmsd  = &vmstate_lance,
     .qdev.props = (Property[]) {
-        DEFINE_PROP_PTR("dma", SysBusPCNetState, state.dma_opaque),
+        DEFINE_PROP_PTR("dma", SysBusPCNetState, state.dma_opaque, ""),
         DEFINE_NIC_PROPERTIES(SysBusPCNetState, state.conf),
         DEFINE_PROP_END_OF_LIST(),
     }
diff --git a/hw/m48t59.c b/hw/m48t59.c
index c3d7b3a..5402932 100644
--- a/hw/m48t59.c
+++ b/hw/m48t59.c
@@ -730,9 +730,9 @@ static ISADeviceInfo m48t59_isa_info = {
     .qdev.reset = m48t59_reset_isa,
     .qdev.no_user = 1,
     .qdev.props = (Property[]) {
-        DEFINE_PROP_UINT32("size",    M48t59ISAState, state.size,    -1),
-        DEFINE_PROP_UINT32("type",    M48t59ISAState, state.type,    -1),
-        DEFINE_PROP_HEX32( "io_base", M48t59ISAState, state.io_base,  0),
+        DEFINE_PROP_UINT32("size",    M48t59ISAState, state.size,    -1, ""),
+        DEFINE_PROP_UINT32("type",    M48t59ISAState, state.type,    -1, ""),
+        DEFINE_PROP_HEX32( "io_base", M48t59ISAState, state.io_base,  0, ""),
         DEFINE_PROP_END_OF_LIST(),
     }
 };
@@ -743,9 +743,9 @@ static SysBusDeviceInfo m48t59_info = {
     .qdev.size = sizeof(M48t59SysBusState),
     .qdev.reset = m48t59_reset_sysbus,
     .qdev.props = (Property[]) {
-        DEFINE_PROP_UINT32("size",    M48t59SysBusState, state.size,    -1),
-        DEFINE_PROP_UINT32("type",    M48t59SysBusState, state.type,    -1),
-        DEFINE_PROP_HEX32( "io_base", M48t59SysBusState, state.io_base,  0),
+        DEFINE_PROP_UINT32("size",    M48t59SysBusState, state.size,    -1, ""),
+        DEFINE_PROP_UINT32("type",    M48t59SysBusState, state.type,    -1, ""),
+        DEFINE_PROP_HEX32( "io_base", M48t59SysBusState, state.io_base,  0, ""),
         DEFINE_PROP_END_OF_LIST(),
     }
 };
diff --git a/hw/mc146818rtc.c b/hw/mc146818rtc.c
index 571c593..a2691f4 100644
--- a/hw/mc146818rtc.c
+++ b/hw/mc146818rtc.c
@@ -637,7 +637,7 @@ static ISADeviceInfo mc146818rtc_info = {
     .qdev.vmsd     = &vmstate_rtc,
     .init          = rtc_initfn,
     .qdev.props    = (Property[]) {
-        DEFINE_PROP_INT32("base_year", RTCState, base_year, 1980),
+        DEFINE_PROP_INT32("base_year", RTCState, base_year, 1980, ""),
         DEFINE_PROP_END_OF_LIST(),
     }
 };
diff --git a/hw/ne2000-isa.c b/hw/ne2000-isa.c
index 03a5a1f..ec7daa3 100644
--- a/hw/ne2000-isa.c
+++ b/hw/ne2000-isa.c
@@ -107,8 +107,8 @@ static ISADeviceInfo ne2000_isa_info = {
     .qdev.size  = sizeof(ISANE2000State),
     .init       = isa_ne2000_initfn,
     .qdev.props = (Property[]) {
-        DEFINE_PROP_HEX32("iobase", ISANE2000State, iobase, 0x300),
-        DEFINE_PROP_UINT32("irq",   ISANE2000State, isairq, 9),
+        DEFINE_PROP_HEX32("iobase", ISANE2000State, iobase, 0x300, ""),
+        DEFINE_PROP_UINT32("irq",   ISANE2000State, isairq, 9, ""),
         DEFINE_NIC_PROPERTIES(ISANE2000State, ne2000.c),
         DEFINE_PROP_END_OF_LIST(),
     },
diff --git a/hw/parallel.c b/hw/parallel.c
index be8e2d5..9298d26 100644
--- a/hw/parallel.c
+++ b/hw/parallel.c
@@ -586,10 +586,10 @@ static ISADeviceInfo parallel_isa_info = {
     .qdev.size  = sizeof(ISAParallelState),
     .init       = parallel_isa_initfn,
     .qdev.props = (Property[]) {
-        DEFINE_PROP_UINT32("index", ISAParallelState, index,   -1),
-        DEFINE_PROP_HEX32("iobase", ISAParallelState, iobase,  -1),
-        DEFINE_PROP_UINT32("irq",   ISAParallelState, isairq,  7),
-        DEFINE_PROP_CHR("chardev",  ISAParallelState, state.chr),
+        DEFINE_PROP_UINT32("index", ISAParallelState, index,   -1, ""),
+        DEFINE_PROP_HEX32("iobase", ISAParallelState, iobase,  -1, ""),
+        DEFINE_PROP_UINT32("irq",   ISAParallelState, isairq,  7, ""),
+        DEFINE_PROP_CHR("chardev",  ISAParallelState, state.chr, ""),
         DEFINE_PROP_END_OF_LIST(),
     },
 };
diff --git a/hw/pci.c b/hw/pci.c
index 8d84651..a3c6c9f 100644
--- a/hw/pci.c
+++ b/hw/pci.c
@@ -64,9 +64,9 @@ static struct BusInfo pci_bus_info = {
     .size       = sizeof(PCIBus),
     .print_dev  = pcibus_dev_print,
     .props      = (Property[]) {
-        DEFINE_PROP_PCI_DEVFN("addr", PCIDevice, devfn, -1),
-        DEFINE_PROP_STRING("romfile", PCIDevice, romfile),
-        DEFINE_PROP_UINT32("rombar",  PCIDevice, rom_bar, 1),
+        DEFINE_PROP_PCI_DEVFN("addr", PCIDevice, devfn, -1, ""),
+        DEFINE_PROP_STRING("romfile", PCIDevice, romfile, ""),
+        DEFINE_PROP_UINT32("rombar",  PCIDevice, rom_bar, 1, ""),
         DEFINE_PROP_END_OF_LIST()
     }
 };
@@ -1906,8 +1906,8 @@ static PCIDeviceInfo bridge_info = {
     .config_write = pci_bridge_write_config,
     .header_type  = PCI_HEADER_TYPE_BRIDGE,
     .qdev.props   = (Property[]) {
-        DEFINE_PROP_HEX32("vendorid", PCIBridge, vid, 0),
-        DEFINE_PROP_HEX32("deviceid", PCIBridge, did, 0),
+        DEFINE_PROP_HEX32("vendorid", PCIBridge, vid, 0, ""),
+        DEFINE_PROP_HEX32("deviceid", PCIBridge, did, 0, ""),
         DEFINE_PROP_END_OF_LIST(),
     }
 };
diff --git a/hw/qdev-addr.h b/hw/qdev-addr.h
index a0ddf38..515a887 100644
--- a/hw/qdev-addr.h
+++ b/hw/qdev-addr.h
@@ -1,5 +1,5 @@
-#define DEFINE_PROP_TADDR(_n, _s, _f, _d)                               \
-    DEFINE_PROP_DEFAULT(_n, _s, _f, _d, qdev_prop_taddr, target_phys_addr_t)
+#define DEFINE_PROP_TADDR(_n, _s, _f, _d, _c)				\
+    DEFINE_PROP_DEFAULT(_n, _s, _f, _d, qdev_prop_taddr, target_phys_addr_t, _c)
 
 extern PropertyInfo qdev_prop_taddr;
 void qdev_prop_set_taddr(DeviceState *dev, const char *name, target_phys_addr_t value);
diff --git a/hw/qdev.c b/hw/qdev.c
index af17486..2cd205b 100644
--- a/hw/qdev.c
+++ b/hw/qdev.c
@@ -187,7 +187,8 @@ int qdev_device_help(QemuOpts *opts)
         if (!prop->info->parse) {
             continue;           /* no way to set it, don't show */
         }
-        error_printf("%s.%s=%s\n", info->name, prop->name, prop->info->name);
+        error_printf("%s.%s=%s, %s\n", info->name, prop->name,
+                     prop->info->name, prop->desc ?: "");
     }
     return 1;
 }
diff --git a/hw/qdev.h b/hw/qdev.h
index a44060e..012e303 100644
--- a/hw/qdev.h
+++ b/hw/qdev.h
@@ -69,6 +69,7 @@ struct BusState {
 struct Property {
     const char   *name;
     PropertyInfo *info;
+    const char   *desc;
     int          offset;
     int          bitnr;
     void         *defval;
@@ -201,59 +202,63 @@ extern PropertyInfo qdev_prop_netdev;
 extern PropertyInfo qdev_prop_vlan;
 extern PropertyInfo qdev_prop_pci_devfn;
 
-#define DEFINE_PROP(_name, _state, _field, _prop, _type) { \
+#define DEFINE_PROP(_name, _state, _field, _prop, _type, _desc) {       \
         .name      = (_name),                                    \
         .info      = &(_prop),                                   \
+        .desc      = (_desc),                                    \
         .offset    = offsetof(_state, _field)                    \
             + type_check(_type,typeof_field(_state, _field)),    \
         }
-#define DEFINE_PROP_DEFAULT(_name, _state, _field, _defval, _prop, _type) { \
+#define DEFINE_PROP_DEFAULT(_name, _state, _field, _defval, _prop, _type, \
+                            _desc) {                                    \
         .name      = (_name),                                           \
         .info      = &(_prop),                                          \
+        .desc      = (_desc),                                           \
         .offset    = offsetof(_state, _field)                           \
             + type_check(_type,typeof_field(_state, _field)),           \
         .defval    = (_type[]) { _defval },                             \
         }
-#define DEFINE_PROP_BIT(_name, _state, _field, _bit, _defval) {  \
+#define DEFINE_PROP_BIT(_name, _state, _field, _bit, _defval, _desc) {  \
         .name      = (_name),                                    \
         .info      = &(qdev_prop_bit),                           \
-        .bitnr    = (_bit),                                      \
+        .desc      = (_desc),                                    \
+        .bitnr     = (_bit),                                     \
         .offset    = offsetof(_state, _field)                    \
             + type_check(uint32_t,typeof_field(_state, _field)), \
         .defval    = (bool[]) { (_defval) },                     \
         }
 
-#define DEFINE_PROP_UINT8(_n, _s, _f, _d)                       \
-    DEFINE_PROP_DEFAULT(_n, _s, _f, _d, qdev_prop_uint8, uint8_t)
-#define DEFINE_PROP_UINT16(_n, _s, _f, _d)                      \
-    DEFINE_PROP_DEFAULT(_n, _s, _f, _d, qdev_prop_uint16, uint16_t)
-#define DEFINE_PROP_UINT32(_n, _s, _f, _d)                      \
-    DEFINE_PROP_DEFAULT(_n, _s, _f, _d, qdev_prop_uint32, uint32_t)
-#define DEFINE_PROP_INT32(_n, _s, _f, _d)                      \
-    DEFINE_PROP_DEFAULT(_n, _s, _f, _d, qdev_prop_int32, int32_t)
-#define DEFINE_PROP_UINT64(_n, _s, _f, _d)                      \
-    DEFINE_PROP_DEFAULT(_n, _s, _f, _d, qdev_prop_uint64, uint64_t)
-#define DEFINE_PROP_HEX32(_n, _s, _f, _d)                       \
-    DEFINE_PROP_DEFAULT(_n, _s, _f, _d, qdev_prop_hex32, uint32_t)
-#define DEFINE_PROP_HEX64(_n, _s, _f, _d)                       \
-    DEFINE_PROP_DEFAULT(_n, _s, _f, _d, qdev_prop_hex64, uint64_t)
-#define DEFINE_PROP_PCI_DEVFN(_n, _s, _f, _d)                   \
-    DEFINE_PROP_DEFAULT(_n, _s, _f, _d, qdev_prop_pci_devfn, uint32_t)
-
-#define DEFINE_PROP_PTR(_n, _s, _f)             \
-    DEFINE_PROP(_n, _s, _f, qdev_prop_ptr, void*)
-#define DEFINE_PROP_CHR(_n, _s, _f)             \
-    DEFINE_PROP(_n, _s, _f, qdev_prop_chr, CharDriverState*)
-#define DEFINE_PROP_STRING(_n, _s, _f)             \
-    DEFINE_PROP(_n, _s, _f, qdev_prop_string, char*)
-#define DEFINE_PROP_NETDEV(_n, _s, _f)             \
-    DEFINE_PROP(_n, _s, _f, qdev_prop_netdev, VLANClientState*)
-#define DEFINE_PROP_VLAN(_n, _s, _f)             \
-    DEFINE_PROP(_n, _s, _f, qdev_prop_vlan, VLANState*)
-#define DEFINE_PROP_DRIVE(_n, _s, _f)             \
-    DEFINE_PROP(_n, _s, _f, qdev_prop_drive, DriveInfo*)
-#define DEFINE_PROP_MACADDR(_n, _s, _f)         \
-    DEFINE_PROP(_n, _s, _f, qdev_prop_macaddr, MACAddr)
+#define DEFINE_PROP_UINT8(_n, _s, _f, _d, _c)                           \
+    DEFINE_PROP_DEFAULT(_n, _s, _f, _d, qdev_prop_uint8, uint8_t, _c)
+#define DEFINE_PROP_UINT16(_n, _s, _f, _d, _c)                          \
+    DEFINE_PROP_DEFAULT(_n, _s, _f, _d, qdev_prop_uint16, uint16_t, _c)
+#define DEFINE_PROP_UINT32(_n, _s, _f, _d, _c)                          \
+    DEFINE_PROP_DEFAULT(_n, _s, _f, _d, qdev_prop_uint32, uint32_t, _c)
+#define DEFINE_PROP_INT32(_n, _s, _f, _d, _c)                           \
+    DEFINE_PROP_DEFAULT(_n, _s, _f, _d, qdev_prop_int32, int32_t, _c)
+#define DEFINE_PROP_UINT64(_n, _s, _f, _d, _c)                          \
+    DEFINE_PROP_DEFAULT(_n, _s, _f, _d, qdev_prop_uint64, uint64_t, _c)
+#define DEFINE_PROP_HEX32(_n, _s, _f, _d, _c)                           \
+    DEFINE_PROP_DEFAULT(_n, _s, _f, _d, qdev_prop_hex32, uint32_t, _c)
+#define DEFINE_PROP_HEX64(_n, _s, _f, _d, _c)                           \
+    DEFINE_PROP_DEFAULT(_n, _s, _f, _d, qdev_prop_hex64, uint64_t, _c)
+#define DEFINE_PROP_PCI_DEVFN(_n, _s, _f, _d, _c)                       \
+    DEFINE_PROP_DEFAULT(_n, _s, _f, _d, qdev_prop_pci_devfn, uint32_t, _c)
+
+#define DEFINE_PROP_PTR(_n, _s, _f, _c)                 \
+    DEFINE_PROP(_n, _s, _f, qdev_prop_ptr, void*, _c)
+#define DEFINE_PROP_CHR(_n, _s, _f, _c)                         \
+    DEFINE_PROP(_n, _s, _f, qdev_prop_chr, CharDriverState*, _c)
+#define DEFINE_PROP_STRING(_n, _s, _f, _c)              \
+    DEFINE_PROP(_n, _s, _f, qdev_prop_string, char*, _c)
+#define DEFINE_PROP_NETDEV(_n, _s, _f, _c)                      \
+    DEFINE_PROP(_n, _s, _f, qdev_prop_netdev, VLANClientState*, _c)
+#define DEFINE_PROP_VLAN(_n, _s, _f, _c)                \
+    DEFINE_PROP(_n, _s, _f, qdev_prop_vlan, VLANState*, _c)
+#define DEFINE_PROP_DRIVE(_n, _s, _f, _c)                       \
+    DEFINE_PROP(_n, _s, _f, qdev_prop_drive, DriveInfo*, _c)
+#define DEFINE_PROP_MACADDR(_n, _s, _f, _c)             \
+    DEFINE_PROP(_n, _s, _f, qdev_prop_macaddr, MACAddr, _c)
 
 #define DEFINE_PROP_END_OF_LIST()               \
     {}
diff --git a/hw/s390-virtio-bus.c b/hw/s390-virtio-bus.c
index fe6884d..7d37b51 100644
--- a/hw/s390-virtio-bus.c
+++ b/hw/s390-virtio-bus.c
@@ -348,7 +348,7 @@ static VirtIOS390DeviceInfo s390_virtio_serial = {
     .qdev.size = sizeof(VirtIOS390Device),
     .qdev.props = (Property[]) {
         DEFINE_PROP_UINT32("max_ports", VirtIOS390Device, max_virtserial_ports,
-                           31),
+                           31, ""),
         DEFINE_PROP_END_OF_LIST(),
     },
 };
diff --git a/hw/sb16.c b/hw/sb16.c
index 78590a7..f2181a2 100644
--- a/hw/sb16.c
+++ b/hw/sb16.c
@@ -1400,11 +1400,11 @@ static ISADeviceInfo sb16_info = {
     .qdev.vmsd     = &vmstate_sb16,
     .init          = sb16_initfn,
     .qdev.props    = (Property[]) {
-        DEFINE_PROP_HEX32  ("version", SB16State, ver,  0x0405), /* 4.5 */
-        DEFINE_PROP_HEX32  ("iobase",  SB16State, port, 0x220),
-        DEFINE_PROP_UINT32 ("irq",     SB16State, irq,  5),
-        DEFINE_PROP_UINT32 ("dma",     SB16State, dma,  1),
-        DEFINE_PROP_UINT32 ("dma16",   SB16State, hdma, 5),
+        DEFINE_PROP_HEX32  ("version", SB16State, ver,  0x0405, ""), /* 4.5 */
+        DEFINE_PROP_HEX32  ("iobase",  SB16State, port, 0x220, ""),
+        DEFINE_PROP_UINT32 ("irq",     SB16State, irq,  5, ""),
+        DEFINE_PROP_UINT32 ("dma",     SB16State, dma,  1, ""),
+        DEFINE_PROP_UINT32 ("dma16",   SB16State, hdma, 5, ""),
         DEFINE_PROP_END_OF_LIST (),
     },
 };
diff --git a/hw/scsi-bus.c b/hw/scsi-bus.c
index 383240b..356a97d 100644
--- a/hw/scsi-bus.c
+++ b/hw/scsi-bus.c
@@ -9,7 +9,7 @@ static struct BusInfo scsi_bus_info = {
     .name  = "SCSI",
     .size  = sizeof(SCSIBus),
     .props = (Property[]) {
-        DEFINE_PROP_UINT32("scsi-id", SCSIDevice, id, -1),
+        DEFINE_PROP_UINT32("scsi-id", SCSIDevice, id, -1, ""),
         DEFINE_PROP_END_OF_LIST(),
     },
 };
diff --git a/hw/scsi-disk.c b/hw/scsi-disk.c
index 4d20919..594a9ad 100644
--- a/hw/scsi-disk.c
+++ b/hw/scsi-disk.c
@@ -1089,7 +1089,7 @@ static SCSIDeviceInfo scsi_disk_info = {
     .get_buf      = scsi_get_buf,
     .qdev.props   = (Property[]) {
         DEFINE_BLOCK_PROPERTIES(SCSIDiskState, qdev.conf),
-        DEFINE_PROP_STRING("ver",  SCSIDiskState, version),
+        DEFINE_PROP_STRING("ver",  SCSIDiskState, version, ""),
         DEFINE_PROP_END_OF_LIST(),
     },
 };
diff --git a/hw/serial.c b/hw/serial.c
index 9102edb..561cc07 100644
--- a/hw/serial.c
+++ b/hw/serial.c
@@ -969,10 +969,10 @@ static ISADeviceInfo serial_isa_info = {
     .qdev.vmsd  = &vmstate_isa_serial,
     .init       = serial_isa_initfn,
     .qdev.props = (Property[]) {
-        DEFINE_PROP_UINT32("index", ISASerialState, index,   -1),
-        DEFINE_PROP_HEX32("iobase", ISASerialState, iobase,  -1),
-        DEFINE_PROP_UINT32("irq",   ISASerialState, isairq,  -1),
-        DEFINE_PROP_CHR("chardev",  ISASerialState, state.chr),
+        DEFINE_PROP_UINT32("index", ISASerialState, index,   -1, ""),
+        DEFINE_PROP_HEX32("iobase", ISASerialState, iobase,  -1, ""),
+        DEFINE_PROP_UINT32("irq",   ISASerialState, isairq,  -1, ""),
+        DEFINE_PROP_CHR("chardev",  ISASerialState, state.chr, ""),
         DEFINE_PROP_END_OF_LIST(),
     },
 };
diff --git a/hw/slavio_timer.c b/hw/slavio_timer.c
index d787553..a1d7ec8 100644
--- a/hw/slavio_timer.c
+++ b/hw/slavio_timer.c
@@ -425,7 +425,7 @@ static SysBusDeviceInfo slavio_timer_info = {
     .qdev.vmsd  = &vmstate_slavio_timer,
     .qdev.reset = slavio_timer_reset,
     .qdev.props = (Property[]) {
-        DEFINE_PROP_UINT32("num_cpus",  SLAVIO_TIMERState, num_cpus,  0),
+        DEFINE_PROP_UINT32("num_cpus",  SLAVIO_TIMERState, num_cpus,  0, ""),
         DEFINE_PROP_END_OF_LIST(),
     }
 };
diff --git a/hw/smbus_eeprom.c b/hw/smbus_eeprom.c
index 52463e0..9ee8f54 100644
--- a/hw/smbus_eeprom.c
+++ b/hw/smbus_eeprom.c
@@ -108,7 +108,7 @@ static SMBusDeviceInfo smbus_eeprom_info = {
     .i2c.qdev.name = "smbus-eeprom",
     .i2c.qdev.size = sizeof(SMBusEEPROMDevice),
     .i2c.qdev.props = (Property[]) {
-        DEFINE_PROP_PTR("data", SMBusEEPROMDevice, data),
+        DEFINE_PROP_PTR("data", SMBusEEPROMDevice, data, ""),
         DEFINE_PROP_END_OF_LIST(),
     },
     .init = smbus_eeprom_init,
diff --git a/hw/sparc32_dma.c b/hw/sparc32_dma.c
index b521707..5e58605 100644
--- a/hw/sparc32_dma.c
+++ b/hw/sparc32_dma.c
@@ -274,7 +274,7 @@ static SysBusDeviceInfo sparc32_dma_info = {
     .qdev.vmsd  = &vmstate_dma,
     .qdev.reset = dma_reset,
     .qdev.props = (Property[]) {
-        DEFINE_PROP_PTR("iommu_opaque", DMAState, iommu),
+        DEFINE_PROP_PTR("iommu_opaque", DMAState, iommu, ""),
         DEFINE_PROP_END_OF_LIST(),
     }
 };
diff --git a/hw/sun4m.c b/hw/sun4m.c
index 7ba0f76..37c0ce4 100644
--- a/hw/sun4m.c
+++ b/hw/sun4m.c
@@ -760,7 +760,7 @@ static SysBusDeviceInfo ram_info = {
     .qdev.name  = "memory",
     .qdev.size  = sizeof(RamDevice),
     .qdev.props = (Property[]) {
-        DEFINE_PROP_UINT64("size", RamDevice, size, 0),
+        DEFINE_PROP_UINT64("size", RamDevice, size, 0, ""),
         DEFINE_PROP_END_OF_LIST(),
     }
 };
diff --git a/hw/sun4m_iommu.c b/hw/sun4m_iommu.c
index 1dbe077..fa146b8 100644
--- a/hw/sun4m_iommu.c
+++ b/hw/sun4m_iommu.c
@@ -379,7 +379,7 @@ static SysBusDeviceInfo iommu_info = {
     .qdev.vmsd  = &vmstate_iommu,
     .qdev.reset = iommu_reset,
     .qdev.props = (Property[]) {
-        DEFINE_PROP_HEX32("version", IOMMUState, version, 0),
+        DEFINE_PROP_HEX32("version", IOMMUState, version, 0, ""),
         DEFINE_PROP_END_OF_LIST(),
     }
 };
diff --git a/hw/sun4u.c b/hw/sun4u.c
index 40b5f1f..e70609f 100644
--- a/hw/sun4u.c
+++ b/hw/sun4u.c
@@ -692,7 +692,7 @@ static SysBusDeviceInfo ram_info = {
     .qdev.name  = "memory",
     .qdev.size  = sizeof(RamDevice),
     .qdev.props = (Property[]) {
-        DEFINE_PROP_UINT64("size", RamDevice, size, 0),
+        DEFINE_PROP_UINT64("size", RamDevice, size, 0, ""),
         DEFINE_PROP_END_OF_LIST(),
     }
 };
diff --git a/hw/syborg_fb.c b/hw/syborg_fb.c
index 7be04a3..c707cab 100644
--- a/hw/syborg_fb.c
+++ b/hw/syborg_fb.c
@@ -536,8 +536,8 @@ static SysBusDeviceInfo syborg_fb_info = {
     .qdev.name  = "syborg,framebuffer",
     .qdev.size  = sizeof(SyborgFBState),
     .qdev.props = (Property[]) {
-        DEFINE_PROP_UINT32("width",  SyborgFBState, cols, 0),
-        DEFINE_PROP_UINT32("height", SyborgFBState, rows, 0),
+        DEFINE_PROP_UINT32("width",  SyborgFBState, cols, 0, ""),
+        DEFINE_PROP_UINT32("height", SyborgFBState, rows, 0, ""),
         DEFINE_PROP_END_OF_LIST(),
     }
 };
diff --git a/hw/syborg_interrupt.c b/hw/syborg_interrupt.c
index f3a1767..c9c787d 100644
--- a/hw/syborg_interrupt.c
+++ b/hw/syborg_interrupt.c
@@ -223,7 +223,7 @@ static SysBusDeviceInfo syborg_int_info = {
     .qdev.name  = "syborg,interrupt",
     .qdev.size  = sizeof(SyborgIntState),
     .qdev.props = (Property[]) {
-        DEFINE_PROP_UINT32("num-interrupts", SyborgIntState, num_irqs, 64),
+        DEFINE_PROP_UINT32("num-interrupts", SyborgIntState, num_irqs, 64, ""),
         DEFINE_PROP_END_OF_LIST(),
     }
 };
diff --git a/hw/syborg_keyboard.c b/hw/syborg_keyboard.c
index 4a562f8..89a0ce9 100644
--- a/hw/syborg_keyboard.c
+++ b/hw/syborg_keyboard.c
@@ -230,7 +230,7 @@ static SysBusDeviceInfo syborg_keyboard_info = {
     .qdev.name  = "syborg,keyboard",
     .qdev.size  = sizeof(SyborgKeyboardState),
     .qdev.props = (Property[]) {
-        DEFINE_PROP_UINT32("fifo-size", SyborgKeyboardState, fifo_size, 16),
+        DEFINE_PROP_UINT32("fifo-size", SyborgKeyboardState, fifo_size, 16, ""),
         DEFINE_PROP_END_OF_LIST(),
     }
 };
diff --git a/hw/syborg_pointer.c b/hw/syborg_pointer.c
index 563d730..c5f28d4 100644
--- a/hw/syborg_pointer.c
+++ b/hw/syborg_pointer.c
@@ -228,8 +228,8 @@ static SysBusDeviceInfo syborg_pointer_info = {
     .qdev.name  = "syborg,pointer",
     .qdev.size  = sizeof(SyborgPointerState),
     .qdev.props = (Property[]) {
-        DEFINE_PROP_UINT32("fifo-size", SyborgPointerState, fifo_size, 16),
-        DEFINE_PROP_UINT32("absolute",  SyborgPointerState, absolute,   1),
+        DEFINE_PROP_UINT32("fifo-size", SyborgPointerState, fifo_size, 16, ""),
+        DEFINE_PROP_UINT32("absolute",  SyborgPointerState, absolute,   1, ""),
         DEFINE_PROP_END_OF_LIST(),
     }
 };
diff --git a/hw/syborg_serial.c b/hw/syborg_serial.c
index cac00ea..6a2203f 100644
--- a/hw/syborg_serial.c
+++ b/hw/syborg_serial.c
@@ -345,7 +345,7 @@ static SysBusDeviceInfo syborg_serial_info = {
     .qdev.name  = "syborg,serial",
     .qdev.size  = sizeof(SyborgSerialState),
     .qdev.props = (Property[]) {
-        DEFINE_PROP_UINT32("fifo-size", SyborgSerialState, fifo_size, 16),
+        DEFINE_PROP_UINT32("fifo-size", SyborgSerialState, fifo_size, 16, ""),
         DEFINE_PROP_END_OF_LIST(),
     }
 };
diff --git a/hw/syborg_timer.c b/hw/syborg_timer.c
index 3e4a447..7edbeed 100644
--- a/hw/syborg_timer.c
+++ b/hw/syborg_timer.c
@@ -231,7 +231,7 @@ static SysBusDeviceInfo syborg_timer_info = {
     .qdev.name  = "syborg,timer",
     .qdev.size  = sizeof(SyborgTimerState),
     .qdev.props = (Property[]) {
-        DEFINE_PROP_UINT32("frequency",SyborgTimerState, freq, 0),
+        DEFINE_PROP_UINT32("frequency",SyborgTimerState, freq, 0, ""),
         DEFINE_PROP_END_OF_LIST(),
     }
 };
diff --git a/hw/tcx.c b/hw/tcx.c
index beb30ac..52eb656 100644
--- a/hw/tcx.c
+++ b/hw/tcx.c
@@ -633,11 +633,11 @@ static SysBusDeviceInfo tcx_info = {
     .qdev.reset = tcx_reset,
     .qdev.vmsd  = &vmstate_tcx,
     .qdev.props = (Property[]) {
-        DEFINE_PROP_TADDR("addr",      TCXState, addr,      -1),
-        DEFINE_PROP_HEX32("vram_size", TCXState, vram_size, -1),
-        DEFINE_PROP_UINT16("width",    TCXState, width,     -1),
-        DEFINE_PROP_UINT16("height",   TCXState, height,    -1),
-        DEFINE_PROP_UINT16("depth",    TCXState, depth,     -1),
+        DEFINE_PROP_TADDR("addr",      TCXState, addr,      -1, ""),
+        DEFINE_PROP_HEX32("vram_size", TCXState, vram_size, -1, ""),
+        DEFINE_PROP_UINT16("width",    TCXState, width,     -1, ""),
+        DEFINE_PROP_UINT16("height",   TCXState, height,    -1, ""),
+        DEFINE_PROP_UINT16("depth",    TCXState, depth,     -1, ""),
         DEFINE_PROP_END_OF_LIST(),
     }
 };
diff --git a/hw/usb-ohci.c b/hw/usb-ohci.c
index 9f80e15..30a2e7f 100644
--- a/hw/usb-ohci.c
+++ b/hw/usb-ohci.c
@@ -1778,8 +1778,8 @@ static SysBusDeviceInfo ohci_sysbus_info = {
     .qdev.desc    = "OHCI USB Controller",
     .qdev.size    = sizeof(OHCISysBusState),
     .qdev.props = (Property[]) {
-        DEFINE_PROP_UINT32("num-ports", OHCISysBusState, num_ports, 3),
-        DEFINE_PROP_TADDR("dma-offset", OHCISysBusState, dma_offset, 3),
+        DEFINE_PROP_UINT32("num-ports", OHCISysBusState, num_ports, 3, ""),
+        DEFINE_PROP_TADDR("dma-offset", OHCISysBusState, dma_offset, 3, ""),
         DEFINE_PROP_END_OF_LIST(),
     }
 };
diff --git a/hw/usb-serial.c b/hw/usb-serial.c
index 5b2483a..a07404c 100644
--- a/hw/usb-serial.c
+++ b/hw/usb-serial.c
@@ -637,9 +637,9 @@ static struct USBDeviceInfo serial_info = {
     .usbdevice_name = "serial",
     .usbdevice_init = usb_serial_init,
     .qdev.props     = (Property[]) {
-        DEFINE_PROP_CHR("chardev",     USBSerialState, cs),
-        DEFINE_PROP_HEX32("vendorid",  USBSerialState, vendorid,  0x0403),
-        DEFINE_PROP_HEX32("productid", USBSerialState, productid, 0x6001),
+        DEFINE_PROP_CHR("chardev",     USBSerialState, cs, ""),
+        DEFINE_PROP_HEX32("vendorid",  USBSerialState, vendorid,  0x0403, ""),
+        DEFINE_PROP_HEX32("productid", USBSerialState, productid, 0x6001, ""),
         DEFINE_PROP_END_OF_LIST(),
     },
 };
@@ -657,9 +657,9 @@ static struct USBDeviceInfo braille_info = {
     .usbdevice_name = "braille",
     .usbdevice_init = usb_braille_init,
     .qdev.props     = (Property[]) {
-        DEFINE_PROP_CHR("chardev",     USBSerialState, cs),
-        DEFINE_PROP_HEX32("vendorid",  USBSerialState, vendorid,  0x0403),
-        DEFINE_PROP_HEX32("productid", USBSerialState, productid, 0xfe72),
+        DEFINE_PROP_CHR("chardev",     USBSerialState, cs, ""),
+        DEFINE_PROP_HEX32("vendorid",  USBSerialState, vendorid,  0x0403, ""),
+        DEFINE_PROP_HEX32("productid", USBSerialState, productid, 0xfe72, ""),
         DEFINE_PROP_END_OF_LIST(),
     },
 };
diff --git a/hw/vga-pci.c b/hw/vga-pci.c
index eef78ed..a4688ea 100644
--- a/hw/vga-pci.c
+++ b/hw/vga-pci.c
@@ -132,8 +132,8 @@ static PCIDeviceInfo vga_info = {
     .init         = pci_vga_initfn,
     .config_write = pci_vga_write_config,
     .qdev.props   = (Property[]) {
-        DEFINE_PROP_HEX32("bios-offset", PCIVGAState, vga.bios_offset, 0),
-        DEFINE_PROP_HEX32("bios-size",   PCIVGAState, vga.bios_size,   0),
+        DEFINE_PROP_HEX32("bios-offset", PCIVGAState, vga.bios_offset, 0, ""),
+        DEFINE_PROP_HEX32("bios-size",   PCIVGAState, vga.bios_size,   0, ""),
         DEFINE_PROP_END_OF_LIST(),
     }
 };
diff --git a/hw/virtio-blk.h b/hw/virtio-blk.h
index 7a7ece3..00af0e8 100644
--- a/hw/virtio-blk.h
+++ b/hw/virtio-blk.h
@@ -94,8 +94,8 @@ struct virtio_scsi_inhdr
 
 #ifdef __linux__
 #define DEFINE_VIRTIO_BLK_FEATURES(_state, _field) \
-        DEFINE_VIRTIO_COMMON_FEATURES(_state, _field), \
-        DEFINE_PROP_BIT("scsi", _state, _field, VIRTIO_BLK_F_SCSI, true)
+        DEFINE_VIRTIO_COMMON_FEATURES(_state, _field),                      \
+        DEFINE_PROP_BIT("scsi", _state, _field, VIRTIO_BLK_F_SCSI, true, "")
 #else
 #define DEFINE_VIRTIO_BLK_FEATURES(_state, _field) \
         DEFINE_VIRTIO_COMMON_FEATURES(_state, _field)
diff --git a/hw/virtio-console.c b/hw/virtio-console.c
index caea11f..ccd277a 100644
--- a/hw/virtio-console.c
+++ b/hw/virtio-console.c
@@ -95,10 +95,11 @@ static VirtIOSerialPortInfo virtconsole_info = {
     .init          = virtconsole_initfn,
     .exit          = virtconsole_exitfn,
     .qdev.props = (Property[]) {
-        DEFINE_PROP_UINT8("is_console", VirtConsole, port.is_console, 1),
-        DEFINE_PROP_UINT32("nr", VirtConsole, port.id, VIRTIO_CONSOLE_BAD_ID),
-        DEFINE_PROP_CHR("chardev", VirtConsole, chr),
-        DEFINE_PROP_STRING("name", VirtConsole, port.name),
+        DEFINE_PROP_UINT8("is_console", VirtConsole, port.is_console, 1, ""),
+        DEFINE_PROP_UINT32("nr", VirtConsole, port.id, VIRTIO_CONSOLE_BAD_ID,
+                           ""),
+        DEFINE_PROP_CHR("chardev", VirtConsole, chr, ""),
+        DEFINE_PROP_STRING("name", VirtConsole, port.name, ""),
         DEFINE_PROP_END_OF_LIST(),
     },
 };
@@ -131,9 +132,10 @@ static VirtIOSerialPortInfo virtserialport_info = {
     .init          = virtserialport_initfn,
     .exit          = virtconsole_exitfn,
     .qdev.props = (Property[]) {
-        DEFINE_PROP_UINT32("nr", VirtConsole, port.id, VIRTIO_CONSOLE_BAD_ID),
-        DEFINE_PROP_CHR("chardev", VirtConsole, chr),
-        DEFINE_PROP_STRING("name", VirtConsole, port.name),
+        DEFINE_PROP_UINT32("nr", VirtConsole, port.id, VIRTIO_CONSOLE_BAD_ID,
+                           ""),
+        DEFINE_PROP_CHR("chardev", VirtConsole, chr, ""),
+        DEFINE_PROP_STRING("name", VirtConsole, port.name, ""),
         DEFINE_PROP_END_OF_LIST(),
     },
 };
diff --git a/hw/virtio-net.h b/hw/virtio-net.h
index 235f1a9..b322ee4 100644
--- a/hw/virtio-net.h
+++ b/hw/virtio-net.h
@@ -154,22 +154,37 @@ struct virtio_net_ctrl_mac {
  #define VIRTIO_NET_CTRL_VLAN_DEL             1
 
 #define DEFINE_VIRTIO_NET_FEATURES(_state, _field) \
-        DEFINE_VIRTIO_COMMON_FEATURES(_state, _field), \
-        DEFINE_PROP_BIT("csum", _state, _field, VIRTIO_NET_F_CSUM, true), \
-        DEFINE_PROP_BIT("guest_csum", _state, _field, VIRTIO_NET_F_GUEST_CSUM, true), \
-        DEFINE_PROP_BIT("gso", _state, _field, VIRTIO_NET_F_GSO, true), \
-        DEFINE_PROP_BIT("guest_tso4", _state, _field, VIRTIO_NET_F_GUEST_TSO4, true), \
-        DEFINE_PROP_BIT("guest_tso6", _state, _field, VIRTIO_NET_F_GUEST_TSO6, true), \
-        DEFINE_PROP_BIT("guest_ecn", _state, _field, VIRTIO_NET_F_GUEST_ECN, true), \
-        DEFINE_PROP_BIT("guest_ufo", _state, _field, VIRTIO_NET_F_GUEST_UFO, true), \
-        DEFINE_PROP_BIT("host_tso4", _state, _field, VIRTIO_NET_F_HOST_TSO4, true), \
-        DEFINE_PROP_BIT("host_tso6", _state, _field, VIRTIO_NET_F_HOST_TSO6, true), \
-        DEFINE_PROP_BIT("host_ecn", _state, _field, VIRTIO_NET_F_HOST_ECN, true), \
-        DEFINE_PROP_BIT("host_ufo", _state, _field, VIRTIO_NET_F_HOST_UFO, true), \
-        DEFINE_PROP_BIT("mrg_rxbuf", _state, _field, VIRTIO_NET_F_MRG_RXBUF, true), \
-        DEFINE_PROP_BIT("status", _state, _field, VIRTIO_NET_F_STATUS, true), \
-        DEFINE_PROP_BIT("ctrl_vq", _state, _field, VIRTIO_NET_F_CTRL_VQ, true), \
-        DEFINE_PROP_BIT("ctrl_rx", _state, _field, VIRTIO_NET_F_CTRL_RX, true), \
-        DEFINE_PROP_BIT("ctrl_vlan", _state, _field, VIRTIO_NET_F_CTRL_VLAN, true), \
-        DEFINE_PROP_BIT("ctrl_rx_extra", _state, _field, VIRTIO_NET_F_CTRL_RX_EXTRA, true)
+        DEFINE_VIRTIO_COMMON_FEATURES(_state, _field),                        \
+        DEFINE_PROP_BIT("csum", _state, _field, VIRTIO_NET_F_CSUM, true, ""), \
+        DEFINE_PROP_BIT("guest_csum", _state, _field, VIRTIO_NET_F_GUEST_CSUM, \
+                        true, ""),                                      \
+        DEFINE_PROP_BIT("gso", _state, _field, VIRTIO_NET_F_GSO, true, ""), \
+        DEFINE_PROP_BIT("guest_tso4", _state, _field, VIRTIO_NET_F_GUEST_TSO4, \
+                        true, ""),                                      \
+        DEFINE_PROP_BIT("guest_tso6", _state, _field, VIRTIO_NET_F_GUEST_TSO6, \
+                        true, ""),                                      \
+        DEFINE_PROP_BIT("guest_ecn", _state, _field, VIRTIO_NET_F_GUEST_ECN, \
+                        true, ""),                                      \
+        DEFINE_PROP_BIT("guest_ufo", _state, _field, VIRTIO_NET_F_GUEST_UFO, \
+                        true, ""),                                      \
+        DEFINE_PROP_BIT("host_tso4", _state, _field, VIRTIO_NET_F_HOST_TSO4, \
+                        true, ""),                                      \
+        DEFINE_PROP_BIT("host_tso6", _state, _field, VIRTIO_NET_F_HOST_TSO6, \
+                        true, ""),                                      \
+        DEFINE_PROP_BIT("host_ecn", _state, _field, VIRTIO_NET_F_HOST_ECN, \
+                        true, ""),                                      \
+        DEFINE_PROP_BIT("host_ufo", _state, _field, VIRTIO_NET_F_HOST_UFO, \
+                        true, ""),                                      \
+        DEFINE_PROP_BIT("mrg_rxbuf", _state, _field, VIRTIO_NET_F_MRG_RXBUF, \
+                        true, ""),                                      \
+        DEFINE_PROP_BIT("status", _state, _field, VIRTIO_NET_F_STATUS, true, \
+                        ""),                                            \
+        DEFINE_PROP_BIT("ctrl_vq", _state, _field, VIRTIO_NET_F_CTRL_VQ, true, \
+                        ""),                                            \
+        DEFINE_PROP_BIT("ctrl_rx", _state, _field, VIRTIO_NET_F_CTRL_RX, true, \
+                        ""),                                            \
+        DEFINE_PROP_BIT("ctrl_vlan", _state, _field, VIRTIO_NET_F_CTRL_VLAN, \
+                        true, ""),                                      \
+        DEFINE_PROP_BIT("ctrl_rx_extra", _state, _field,                \
+                        VIRTIO_NET_F_CTRL_RX_EXTRA, true, "")
 #endif
diff --git a/hw/virtio-pci.c b/hw/virtio-pci.c
index 7ddf612..5dd910c 100644
--- a/hw/virtio-pci.c
+++ b/hw/virtio-pci.c
@@ -666,9 +666,9 @@ static PCIDeviceInfo virtio_info[] = {
         .init      = virtio_blk_init_pci,
         .exit      = virtio_blk_exit_pci,
         .qdev.props = (Property[]) {
-            DEFINE_PROP_HEX32("class", VirtIOPCIProxy, class_code, 0),
+            DEFINE_PROP_HEX32("class", VirtIOPCIProxy, class_code, 0, ""),
             DEFINE_BLOCK_PROPERTIES(VirtIOPCIProxy, block),
-            DEFINE_PROP_UINT32("vectors", VirtIOPCIProxy, nvectors, 2),
+            DEFINE_PROP_UINT32("vectors", VirtIOPCIProxy, nvectors, 2, ""),
             DEFINE_VIRTIO_BLK_FEATURES(VirtIOPCIProxy, host_features),
             DEFINE_PROP_END_OF_LIST(),
         },
@@ -680,7 +680,7 @@ static PCIDeviceInfo virtio_info[] = {
         .exit       = virtio_net_exit_pci,
         .romfile    = "pxe-virtio.bin",
         .qdev.props = (Property[]) {
-            DEFINE_PROP_UINT32("vectors", VirtIOPCIProxy, nvectors, 3),
+            DEFINE_PROP_UINT32("vectors", VirtIOPCIProxy, nvectors, 3, ""),
             DEFINE_VIRTIO_NET_FEATURES(VirtIOPCIProxy, host_features),
             DEFINE_NIC_PROPERTIES(VirtIOPCIProxy, nic),
             DEFINE_PROP_END_OF_LIST(),
@@ -694,11 +694,11 @@ static PCIDeviceInfo virtio_info[] = {
         .exit      = virtio_exit_pci,
         .qdev.props = (Property[]) {
             DEFINE_PROP_UINT32("vectors", VirtIOPCIProxy, nvectors,
-                               DEV_NVECTORS_UNSPECIFIED),
-            DEFINE_PROP_HEX32("class", VirtIOPCIProxy, class_code, 0),
+                               DEV_NVECTORS_UNSPECIFIED, ""),
+            DEFINE_PROP_HEX32("class", VirtIOPCIProxy, class_code, 0, ""),
             DEFINE_VIRTIO_COMMON_FEATURES(VirtIOPCIProxy, host_features),
             DEFINE_PROP_UINT32("max_ports", VirtIOPCIProxy, max_virtserial_ports,
-                               31),
+                               31, ""),
             DEFINE_PROP_END_OF_LIST(),
         },
         .qdev.reset = virtio_pci_reset,
@@ -719,8 +719,8 @@ static PCIDeviceInfo virtio_info[] = {
         .init      = virtio_9p_init_pci,
         .qdev.props = (Property[]) {
             DEFINE_VIRTIO_COMMON_FEATURES(VirtIOPCIProxy, host_features),
-            DEFINE_PROP_STRING("mount_tag", VirtIOPCIProxy, fsconf.tag),
-            DEFINE_PROP_STRING("fsdev", VirtIOPCIProxy, fsconf.fsdev_id),
+            DEFINE_PROP_STRING("mount_tag", VirtIOPCIProxy, fsconf.tag, ""),
+            DEFINE_PROP_STRING("fsdev", VirtIOPCIProxy, fsconf.fsdev_id, ""),
             DEFINE_PROP_END_OF_LIST(),
         },
     }, {
diff --git a/hw/virtio.h b/hw/virtio.h
index e4306cd..21f0c4c 100644
--- a/hw/virtio.h
+++ b/hw/virtio.h
@@ -197,7 +197,7 @@ void virtio_net_exit(VirtIODevice *vdev);
 
 #define DEFINE_VIRTIO_COMMON_FEATURES(_state, _field) \
 	DEFINE_PROP_BIT("indirect_desc", _state, _field, \
-			VIRTIO_RING_F_INDIRECT_DESC, true)
+			VIRTIO_RING_F_INDIRECT_DESC, true, "")
 
 target_phys_addr_t virtio_queue_get_desc_addr(VirtIODevice *vdev, int n);
 target_phys_addr_t virtio_queue_get_avail_addr(VirtIODevice *vdev, int n);
diff --git a/hw/xilinx_ethlite.c b/hw/xilinx_ethlite.c
index 37e33ec..80fa5b6 100644
--- a/hw/xilinx_ethlite.c
+++ b/hw/xilinx_ethlite.c
@@ -239,8 +239,10 @@ static SysBusDeviceInfo xilinx_ethlite_info = {
     .qdev.name  = "xilinx,ethlite",
     .qdev.size  = sizeof(struct xlx_ethlite),
     .qdev.props = (Property[]) {
-        DEFINE_PROP_UINT32("txpingpong", struct xlx_ethlite, c_tx_pingpong, 1),
-        DEFINE_PROP_UINT32("rxpingpong", struct xlx_ethlite, c_rx_pingpong, 1),
+        DEFINE_PROP_UINT32("txpingpong", struct xlx_ethlite, c_tx_pingpong, 1,
+                           ""),
+        DEFINE_PROP_UINT32("rxpingpong", struct xlx_ethlite, c_rx_pingpong, 1,
+                           ""),
         DEFINE_NIC_PROPERTIES(struct xlx_ethlite, conf),
         DEFINE_PROP_END_OF_LIST(),
     }
diff --git a/hw/xilinx_intc.c b/hw/xilinx_intc.c
index 8ef6474..c33e878 100644
--- a/hw/xilinx_intc.c
+++ b/hw/xilinx_intc.c
@@ -163,7 +163,8 @@ static SysBusDeviceInfo xilinx_intc_info = {
     .qdev.name  = "xilinx,intc",
     .qdev.size  = sizeof(struct xlx_pic),
     .qdev.props = (Property[]) {
-        DEFINE_PROP_UINT32("kind-of-intr", struct xlx_pic, c_kind_of_intr, 0),
+        DEFINE_PROP_UINT32("kind-of-intr", struct xlx_pic, c_kind_of_intr, 0,
+                           ""),
         DEFINE_PROP_END_OF_LIST(),
     }
 };
diff --git a/hw/xilinx_timer.c b/hw/xilinx_timer.c
index e2d9541..65155e7 100644
--- a/hw/xilinx_timer.c
+++ b/hw/xilinx_timer.c
@@ -220,8 +220,8 @@ static SysBusDeviceInfo xilinx_timer_info = {
     .qdev.name  = "xilinx,timer",
     .qdev.size  = sizeof(struct timerblock),
     .qdev.props = (Property[]) {
-        DEFINE_PROP_UINT32("frequency", struct timerblock, freq_hz,   0),
-        DEFINE_PROP_UINT32("nr-timers", struct timerblock, nr_timers, 0),
+        DEFINE_PROP_UINT32("frequency", struct timerblock, freq_hz,   0, ""),
+        DEFINE_PROP_UINT32("nr-timers", struct timerblock, nr_timers, 0, ""),
         DEFINE_PROP_END_OF_LIST(),
     }
 };
diff --git a/net.h b/net.h
index b83f615..0e9cc5d 100644
--- a/net.h
+++ b/net.h
@@ -21,9 +21,9 @@ typedef struct NICConf {
 } NICConf;
 
 #define DEFINE_NIC_PROPERTIES(_state, _conf)                            \
-    DEFINE_PROP_MACADDR("mac",   _state, _conf.macaddr),                \
-    DEFINE_PROP_VLAN("vlan",     _state, _conf.vlan),                   \
-    DEFINE_PROP_NETDEV("netdev", _state, _conf.peer)
+    DEFINE_PROP_MACADDR("mac",   _state, _conf.macaddr, ""),            \
+    DEFINE_PROP_VLAN("vlan",     _state, _conf.vlan, ""),               \
+    DEFINE_PROP_NETDEV("netdev", _state, _conf.peer, "")
 
 /* VLANs support */
 
diff --git a/usb-linux.c b/usb-linux.c
index 88273ff..fd62a94 100644
--- a/usb-linux.c
+++ b/usb-linux.c
@@ -1018,10 +1018,10 @@ static struct USBDeviceInfo usb_host_dev_info = {
     .usbdevice_name = "host",
     .usbdevice_init = usb_host_device_open,
     .qdev.props     = (Property[]) {
-        DEFINE_PROP_UINT32("hostbus",  USBHostDevice, match.bus_num,    0),
-        DEFINE_PROP_UINT32("hostaddr", USBHostDevice, match.addr,       0),
-        DEFINE_PROP_HEX32("vendorid",  USBHostDevice, match.vendor_id,  0),
-        DEFINE_PROP_HEX32("productid", USBHostDevice, match.product_id, 0),
+        DEFINE_PROP_UINT32("hostbus",  USBHostDevice, match.bus_num,    0, ""),
+        DEFINE_PROP_UINT32("hostaddr", USBHostDevice, match.addr,       0, ""),
+        DEFINE_PROP_HEX32("vendorid",  USBHostDevice, match.vendor_id,  0, ""),
+        DEFINE_PROP_HEX32("productid", USBHostDevice, match.product_id, 0, ""),
         DEFINE_PROP_END_OF_LIST(),
     },
 };
