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Re: [Qemu-ppc] [Qemu-devel] [QEMU PATCH v5 3/6] migration: extend VMStat


From: David Gibson
Subject: Re: [Qemu-ppc] [Qemu-devel] [QEMU PATCH v5 3/6] migration: extend VMStateInfo
Date: Mon, 10 Oct 2016 16:02:35 +1100
User-agent: Mutt/1.7.0 (2016-08-17)

On Fri, Oct 07, 2016 at 07:42:12PM +0100, Dr. David Alan Gilbert wrote:
> * Jianjun Duan (address@hidden) wrote:
> > 
> > 
> > On 10/07/2016 05:08 AM, Dr. David Alan Gilbert wrote:
> > > * Jianjun Duan (address@hidden) wrote:
> > >> Current migration code cannot handle some data structures such as
> > >> QTAILQ in qemu/queue.h. Here we extend the signatures of put/get
> > >> in VMStateInfo so that customized handling is supported.
> > >>
> > >> Signed-off-by: Jianjun Duan <address@hidden>
> > >> ---
> > >>  hw/net/vmxnet3.c            | 18 ++++++---
> > >>  hw/nvram/eeprom93xx.c       |  6 ++-
> > >>  hw/nvram/fw_cfg.c           |  6 ++-
> > >>  hw/pci/msix.c               |  6 ++-
> > >>  hw/pci/pci.c                | 12 ++++--
> > >>  hw/pci/shpc.c               |  5 ++-
> > >>  hw/scsi/scsi-bus.c          |  6 ++-
> > >>  hw/timer/twl92230.c         |  6 ++-
> > >>  hw/usb/redirect.c           | 18 ++++++---
> > >>  hw/virtio/virtio-pci.c      |  6 ++-
> > >>  hw/virtio/virtio.c          |  6 ++-
> > >>  include/migration/vmstate.h | 10 +++--
> > >>  migration/savevm.c          |  5 ++-
> > >>  migration/vmstate.c         | 95 
> > >> ++++++++++++++++++++++++++++-----------------
> > >>  target-alpha/machine.c      |  5 ++-
> > >>  target-arm/machine.c        | 12 ++++--
> > >>  target-i386/machine.c       | 21 ++++++----
> > >>  target-mips/machine.c       | 10 +++--
> > >>  target-ppc/machine.c        | 10 +++--
> > >>  target-sparc/machine.c      |  5 ++-
> > >>  20 files changed, 171 insertions(+), 97 deletions(-)
> > >>
> > > 
> > > <snip>
> > > 
> > >> diff --git a/hw/usb/redirect.c b/hw/usb/redirect.c
> > >> index 444672a..2ca4b46 100644
> > >> --- a/hw/usb/redirect.c
> > >> +++ b/hw/usb/redirect.c
> > >> @@ -2154,7 +2154,8 @@ static int usbredir_post_load(void *priv, int 
> > >> version_id)
> > >>  }
> > >>  
> > >>  /* For usbredirparser migration */
> > >> -static void usbredir_put_parser(QEMUFile *f, void *priv, size_t unused)
> > >> +static void usbredir_put_parser(QEMUFile *f, void *priv, size_t unused,
> > >> +                                void *opaque, QJSON *vmdesc)
> > >>  {
> > >>      USBRedirDevice *dev = priv;
> > >>      uint8_t *data;
> > >> @@ -2174,7 +2175,8 @@ static void usbredir_put_parser(QEMUFile *f, void 
> > >> *priv, size_t unused)
> > >>      free(data);
> > >>  }
> > >>  
> > >> -static int usbredir_get_parser(QEMUFile *f, void *priv, size_t unused)
> > >> +static int usbredir_get_parser(QEMUFile *f, void *priv, size_t unused,
> > >> +                               void *opaque)
> > > 
> > > Neither of these built for me; I had to change those to VMStateField 
> > > rather than void *;
> > > 
> > > also is this series tested ontop of Halil's patches - because without them
> > > I'm finding I also had to fix up most of the other virtio devices.
> > > 
> > > Dave
> > 
> > I built it on top of ppc-for-2.8 without problems. Is Hail's patch in
> > ppc-for-2.8 yet?

If it's not in master, and not ppc specific, it won't be in ppc-for-2.8.

> I don't know about ppc-for-2.8;  patches for inclusion should work on the 
> current
> head unless stated otherwise.

Right.  These started as ppc specific patches, for which being on top
of ppc-for-2.8 would be the right choice (ppc-for-2.8 regularly
rebases on master).  However, they now include a bunch of generic
migration changes, it should be done directly against master.  This
may require splitting the series into generic and ppc specific
portions.

> Also, make sure you have the usbredir libraries installed and as much else as 
> possible
> to make sure you cover all the .get/.put functions - they're all over!
> 
> Dave
> 
> > Thanks,
> > Jianjun
> > 
> > > 
> > > 
> > >>      USBRedirDevice *dev = priv;
> > >>      uint8_t *data;
> > >> @@ -2217,7 +2219,8 @@ static const VMStateInfo 
> > >> usbredir_parser_vmstate_info = {
> > >>  
> > >>  
> > >>  /* For buffered packets (iso/irq) queue migration */
> > >> -static void usbredir_put_bufpq(QEMUFile *f, void *priv, size_t unused)
> > >> +static void usbredir_put_bufpq(QEMUFile *f, void *priv, size_t unused,
> > >> +                               VMStateField *field, QJSON *vmdesc)
> > >>  {
> > >>      struct endp_data *endp = priv;
> > >>      USBRedirDevice *dev = endp->dev;
> > >> @@ -2237,7 +2240,8 @@ static void usbredir_put_bufpq(QEMUFile *f, void 
> > >> *priv, size_t unused)
> > >>      assert(i == endp->bufpq_size);
> > >>  }
> > >>  
> > >> -static int usbredir_get_bufpq(QEMUFile *f, void *priv, size_t unused)
> > >> +static int usbredir_get_bufpq(QEMUFile *f, void *priv, size_t unused,
> > >> +                              VMStateField *field)
> > >>  {
> > >>      struct endp_data *endp = priv;
> > >>      USBRedirDevice *dev = endp->dev;
> > >> @@ -2340,7 +2344,8 @@ static const VMStateDescription 
> > >> usbredir_ep_vmstate = {
> > >>  
> > >>  
> > >>  /* For PacketIdQueue migration */
> > >> -static void usbredir_put_packet_id_q(QEMUFile *f, void *priv, size_t 
> > >> unused)
> > >> +static void usbredir_put_packet_id_q(QEMUFile *f, void *priv, size_t 
> > >> unused,
> > >> +                                     VMStateField *field, QJSON *vmdesc)
> > >>  {
> > >>      struct PacketIdQueue *q = priv;
> > >>      USBRedirDevice *dev = q->dev;
> > >> @@ -2356,7 +2361,8 @@ static void usbredir_put_packet_id_q(QEMUFile *f, 
> > >> void *priv, size_t unused)
> > >>      assert(remain == 0);
> > >>  }
> > >>  
> > >> -static int usbredir_get_packet_id_q(QEMUFile *f, void *priv, size_t 
> > >> unused)
> > >> +static int usbredir_get_packet_id_q(QEMUFile *f, void *priv, size_t 
> > >> unused,
> > >> +                                    VMStateField *field)
> > >>  {
> > >>      struct PacketIdQueue *q = priv;
> > >>      USBRedirDevice *dev = q->dev;
> > >> diff --git a/hw/virtio/virtio-pci.c b/hw/virtio/virtio-pci.c
> > >> index 2d60a00..38a7abd 100644
> > >> --- a/hw/virtio/virtio-pci.c
> > >> +++ b/hw/virtio/virtio-pci.c
> > >> @@ -108,7 +108,8 @@ static bool virtio_pci_has_extra_state(DeviceState 
> > >> *d)
> > >>      return proxy->flags & VIRTIO_PCI_FLAG_MIGRATE_EXTRA;
> > >>  }
> > >>  
> > >> -static int get_virtio_pci_modern_state(QEMUFile *f, void *pv, size_t 
> > >> size)
> > >> +static int get_virtio_pci_modern_state(QEMUFile *f, void *pv, size_t 
> > >> size,
> > >> +                                       VMStateField *field)
> > >>  {
> > >>      VirtIOPCIProxy *proxy = pv;
> > >>      int i;
> > >> @@ -137,7 +138,8 @@ static void 
> > >> virtio_pci_save_modern_queue_state(VirtIOPCIQueue *vq,
> > >>      qemu_put_be32(f, vq->used[1]);
> > >>  }
> > >>  
> > >> -static void put_virtio_pci_modern_state(QEMUFile *f, void *pv, size_t 
> > >> size)
> > >> +static void put_virtio_pci_modern_state(QEMUFile *f, void *pv, size_t 
> > >> size,
> > >> +                                        VMStateField *field, QJSON 
> > >> *vmdesc)
> > >>  {
> > >>      VirtIOPCIProxy *proxy = pv;
> > >>      int i;
> > >> diff --git a/hw/virtio/virtio.c b/hw/virtio/virtio.c
> > >> index 18ce333..ade2683 100644
> > >> --- a/hw/virtio/virtio.c
> > >> +++ b/hw/virtio/virtio.c
> > >> @@ -1467,7 +1467,8 @@ static const VMStateDescription 
> > >> vmstate_virtio_ringsize = {
> > >>      }
> > >>  };
> > >>  
> > >> -static int get_extra_state(QEMUFile *f, void *pv, size_t size)
> > >> +static int get_extra_state(QEMUFile *f, void *pv, size_t size,
> > >> +                           VMStateField *field)
> > >>  {
> > >>      VirtIODevice *vdev = pv;
> > >>      BusState *qbus = qdev_get_parent_bus(DEVICE(vdev));
> > >> @@ -1480,7 +1481,8 @@ static int get_extra_state(QEMUFile *f, void *pv, 
> > >> size_t size)
> > >>      }
> > >>  }
> > >>  
> > >> -static void put_extra_state(QEMUFile *f, void *pv, size_t size)
> > >> +static void put_extra_state(QEMUFile *f, void *pv, size_t size,
> > >> +                            VMStateField *field, QJSON *vmdesc)
> > >>  {
> > >>      VirtIODevice *vdev = pv;
> > >>      BusState *qbus = qdev_get_parent_bus(DEVICE(vdev));
> > >> diff --git a/include/migration/vmstate.h b/include/migration/vmstate.h
> > >> index 1638ee5..459dd4a 100644
> > >> --- a/include/migration/vmstate.h
> > >> +++ b/include/migration/vmstate.h
> > >> @@ -81,11 +81,13 @@ void unregister_savevm(DeviceState *dev, const char 
> > >> *idstr, void *opaque);
> > >>  
> > >>  typedef struct VMStateInfo VMStateInfo;
> > >>  typedef struct VMStateDescription VMStateDescription;
> > >> +typedef struct VMStateField VMStateField;
> > >>  
> > >>  struct VMStateInfo {
> > >>      const char *name;
> > >> -    int (*get)(QEMUFile *f, void *pv, size_t size);
> > >> -    void (*put)(QEMUFile *f, void *pv, size_t size);
> > >> +    int (*get)(QEMUFile *f, void *pv, size_t size, VMStateField *field);
> > >> +    void (*put)(QEMUFile *f, void *pv, size_t size, VMStateField *field,
> > >> +                QJSON *vmdesc);
> > >>  };
> > >>  
> > >>  enum VMStateFlags {
> > >> @@ -186,7 +188,7 @@ enum VMStateFlags {
> > >>      VMS_MULTIPLY_ELEMENTS = 0x4000,
> > >>  };
> > >>  
> > >> -typedef struct {
> > >> +struct VMStateField {
> > >>      const char *name;
> > >>      size_t offset;
> > >>      size_t size;
> > >> @@ -199,7 +201,7 @@ typedef struct {
> > >>      const VMStateDescription *vmsd;
> > >>      int version_id;
> > >>      bool (*field_exists)(void *opaque, int version_id);
> > >> -} VMStateField;
> > >> +};
> > >>  
> > >>  struct VMStateDescription {
> > >>      const char *name;
> > >> diff --git a/migration/savevm.c b/migration/savevm.c
> > >> index ef5c3d1..13b53ad 100644
> > >> --- a/migration/savevm.c
> > >> +++ b/migration/savevm.c
> > >> @@ -220,14 +220,15 @@ void timer_get(QEMUFile *f, QEMUTimer *ts)
> > >>   * Not in vmstate.c to not add qemu-timer.c as dependency to vmstate.c
> > >>   */
> > >>  
> > >> -static int get_timer(QEMUFile *f, void *pv, size_t size)
> > >> +static int get_timer(QEMUFile *f, void *pv, size_t size, VMStateField 
> > >> *field)
> > >>  {
> > >>      QEMUTimer *v = pv;
> > >>      timer_get(f, v);
> > >>      return 0;
> > >>  }
> > >>  
> > >> -static void put_timer(QEMUFile *f, void *pv, size_t size)
> > >> +static void put_timer(QEMUFile *f, void *pv, size_t size, VMStateField 
> > >> *field,
> > >> +                QJSON *vmdesc)
> > >>  {
> > >>      QEMUTimer *v = pv;
> > >>      timer_put(f, v);
> > >> diff --git a/migration/vmstate.c b/migration/vmstate.c
> > >> index fc29acf..66802cb 100644
> > >> --- a/migration/vmstate.c
> > >> +++ b/migration/vmstate.c
> > >> @@ -122,7 +122,7 @@ int vmstate_load_state(QEMUFile *f, const 
> > >> VMStateDescription *vmsd,
> > >>                      ret = vmstate_load_state(f, field->vmsd, addr,
> > >>                                               field->vmsd->version_id);
> > >>                  } else {
> > >> -                    ret = field->info->get(f, addr, size);
> > >> +                    ret = field->info->get(f, addr, size, NULL);
> > >>  
> > >>                  }
> > >>                  if (ret >= 0) {
> > >> @@ -328,7 +328,7 @@ void vmstate_save_state(QEMUFile *f, const 
> > >> VMStateDescription *vmsd,
> > >>                  if (field->flags & VMS_STRUCT) {
> > >>                      vmstate_save_state(f, field->vmsd, addr, 
> > >> vmdesc_loop);
> > >>                  } else {
> > >> -                    field->info->put(f, addr, size);
> > >> +                    field->info->put(f, addr, size, NULL, NULL);
> > >>                  }
> > >>  
> > >>                  written_bytes = qemu_ftell_fast(f) - old_offset;
> > >> @@ -461,14 +461,15 @@ static void vmstate_subsection_save(QEMUFile *f, 
> > >> const VMStateDescription *vmsd,
> > >>  
> > >>  /* bool */
> > >>  
> > >> -static int get_bool(QEMUFile *f, void *pv, size_t size)
> > >> +static int get_bool(QEMUFile *f, void *pv, size_t size, VMStateField 
> > >> *field)
> > >>  {
> > >>      bool *v = pv;
> > >>      *v = qemu_get_byte(f);
> > >>      return 0;
> > >>  }
> > >>  
> > >> -static void put_bool(QEMUFile *f, void *pv, size_t size)
> > >> +static void put_bool(QEMUFile *f, void *pv, size_t size, VMStateField 
> > >> *field,
> > >> +                     QJSON *vmdesc)
> > >>  {
> > >>      bool *v = pv;
> > >>      qemu_put_byte(f, *v);
> > >> @@ -482,14 +483,15 @@ const VMStateInfo vmstate_info_bool = {
> > >>  
> > >>  /* 8 bit int */
> > >>  
> > >> -static int get_int8(QEMUFile *f, void *pv, size_t size)
> > >> +static int get_int8(QEMUFile *f, void *pv, size_t size, VMStateField 
> > >> *field)
> > >>  {
> > >>      int8_t *v = pv;
> > >>      qemu_get_s8s(f, v);
> > >>      return 0;
> > >>  }
> > >>  
> > >> -static void put_int8(QEMUFile *f, void *pv, size_t size)
> > >> +static void put_int8(QEMUFile *f, void *pv, size_t size, VMStateField 
> > >> *field,
> > >> +                     QJSON *vmdesc)
> > >>  {
> > >>      int8_t *v = pv;
> > >>      qemu_put_s8s(f, v);
> > >> @@ -503,14 +505,15 @@ const VMStateInfo vmstate_info_int8 = {
> > >>  
> > >>  /* 16 bit int */
> > >>  
> > >> -static int get_int16(QEMUFile *f, void *pv, size_t size)
> > >> +static int get_int16(QEMUFile *f, void *pv, size_t size, VMStateField 
> > >> *field)
> > >>  {
> > >>      int16_t *v = pv;
> > >>      qemu_get_sbe16s(f, v);
> > >>      return 0;
> > >>  }
> > >>  
> > >> -static void put_int16(QEMUFile *f, void *pv, size_t size)
> > >> +static void put_int16(QEMUFile *f, void *pv, size_t size, VMStateField 
> > >> *field,
> > >> +                      QJSON *vmdesc)
> > >>  {
> > >>      int16_t *v = pv;
> > >>      qemu_put_sbe16s(f, v);
> > >> @@ -524,14 +527,15 @@ const VMStateInfo vmstate_info_int16 = {
> > >>  
> > >>  /* 32 bit int */
> > >>  
> > >> -static int get_int32(QEMUFile *f, void *pv, size_t size)
> > >> +static int get_int32(QEMUFile *f, void *pv, size_t size, VMStateField 
> > >> *field)
> > >>  {
> > >>      int32_t *v = pv;
> > >>      qemu_get_sbe32s(f, v);
> > >>      return 0;
> > >>  }
> > >>  
> > >> -static void put_int32(QEMUFile *f, void *pv, size_t size)
> > >> +static void put_int32(QEMUFile *f, void *pv, size_t size, VMStateField 
> > >> *field,
> > >> +                      QJSON *vmdesc)
> > >>  {
> > >>      int32_t *v = pv;
> > >>      qemu_put_sbe32s(f, v);
> > >> @@ -546,7 +550,8 @@ const VMStateInfo vmstate_info_int32 = {
> > >>  /* 32 bit int. See that the received value is the same than the one
> > >>     in the field */
> > >>  
> > >> -static int get_int32_equal(QEMUFile *f, void *pv, size_t size)
> > >> +static int get_int32_equal(QEMUFile *f, void *pv, size_t size,
> > >> +                           VMStateField *field)
> > >>  {
> > >>      int32_t *v = pv;
> > >>      int32_t v2;
> > >> @@ -568,7 +573,7 @@ const VMStateInfo vmstate_info_int32_equal = {
> > >>   * and less than or equal to the one in the field.
> > >>   */
> > >>  
> > >> -static int get_int32_le(QEMUFile *f, void *pv, size_t size)
> > >> +static int get_int32_le(QEMUFile *f, void *pv, size_t size, 
> > >> VMStateField *field)
> > >>  {
> > >>      int32_t *cur = pv;
> > >>      int32_t loaded;
> > >> @@ -589,14 +594,15 @@ const VMStateInfo vmstate_info_int32_le = {
> > >>  
> > >>  /* 64 bit int */
> > >>  
> > >> -static int get_int64(QEMUFile *f, void *pv, size_t size)
> > >> +static int get_int64(QEMUFile *f, void *pv, size_t size, VMStateField 
> > >> *field)
> > >>  {
> > >>      int64_t *v = pv;
> > >>      qemu_get_sbe64s(f, v);
> > >>      return 0;
> > >>  }
> > >>  
> > >> -static void put_int64(QEMUFile *f, void *pv, size_t size)
> > >> +static void put_int64(QEMUFile *f, void *pv, size_t size, VMStateField 
> > >> *field,
> > >> +                      QJSON *vmdesc)
> > >>  {
> > >>      int64_t *v = pv;
> > >>      qemu_put_sbe64s(f, v);
> > >> @@ -610,14 +616,15 @@ const VMStateInfo vmstate_info_int64 = {
> > >>  
> > >>  /* 8 bit unsigned int */
> > >>  
> > >> -static int get_uint8(QEMUFile *f, void *pv, size_t size)
> > >> +static int get_uint8(QEMUFile *f, void *pv, size_t size, VMStateField 
> > >> *field)
> > >>  {
> > >>      uint8_t *v = pv;
> > >>      qemu_get_8s(f, v);
> > >>      return 0;
> > >>  }
> > >>  
> > >> -static void put_uint8(QEMUFile *f, void *pv, size_t size)
> > >> +static void put_uint8(QEMUFile *f, void *pv, size_t size, VMStateField 
> > >> *field,
> > >> +                      QJSON *vmdesc)
> > >>  {
> > >>      uint8_t *v = pv;
> > >>      qemu_put_8s(f, v);
> > >> @@ -631,14 +638,15 @@ const VMStateInfo vmstate_info_uint8 = {
> > >>  
> > >>  /* 16 bit unsigned int */
> > >>  
> > >> -static int get_uint16(QEMUFile *f, void *pv, size_t size)
> > >> +static int get_uint16(QEMUFile *f, void *pv, size_t size, VMStateField 
> > >> *field)
> > >>  {
> > >>      uint16_t *v = pv;
> > >>      qemu_get_be16s(f, v);
> > >>      return 0;
> > >>  }
> > >>  
> > >> -static void put_uint16(QEMUFile *f, void *pv, size_t size)
> > >> +static void put_uint16(QEMUFile *f, void *pv, size_t size, VMStateField 
> > >> *field,
> > >> +                       QJSON *vmdesc)
> > >>  {
> > >>      uint16_t *v = pv;
> > >>      qemu_put_be16s(f, v);
> > >> @@ -652,14 +660,15 @@ const VMStateInfo vmstate_info_uint16 = {
> > >>  
> > >>  /* 32 bit unsigned int */
> > >>  
> > >> -static int get_uint32(QEMUFile *f, void *pv, size_t size)
> > >> +static int get_uint32(QEMUFile *f, void *pv, size_t size, VMStateField 
> > >> *field)
> > >>  {
> > >>      uint32_t *v = pv;
> > >>      qemu_get_be32s(f, v);
> > >>      return 0;
> > >>  }
> > >>  
> > >> -static void put_uint32(QEMUFile *f, void *pv, size_t size)
> > >> +static void put_uint32(QEMUFile *f, void *pv, size_t size, VMStateField 
> > >> *field,
> > >> +                       QJSON *vmdesc)
> > >>  {
> > >>      uint32_t *v = pv;
> > >>      qemu_put_be32s(f, v);
> > >> @@ -674,7 +683,8 @@ const VMStateInfo vmstate_info_uint32 = {
> > >>  /* 32 bit uint. See that the received value is the same than the one
> > >>     in the field */
> > >>  
> > >> -static int get_uint32_equal(QEMUFile *f, void *pv, size_t size)
> > >> +static int get_uint32_equal(QEMUFile *f, void *pv, size_t size,
> > >> +                            VMStateField *field)
> > >>  {
> > >>      uint32_t *v = pv;
> > >>      uint32_t v2;
> > >> @@ -694,14 +704,15 @@ const VMStateInfo vmstate_info_uint32_equal = {
> > >>  
> > >>  /* 64 bit unsigned int */
> > >>  
> > >> -static int get_uint64(QEMUFile *f, void *pv, size_t size)
> > >> +static int get_uint64(QEMUFile *f, void *pv, size_t size, VMStateField 
> > >> *field)
> > >>  {
> > >>      uint64_t *v = pv;
> > >>      qemu_get_be64s(f, v);
> > >>      return 0;
> > >>  }
> > >>  
> > >> -static void put_uint64(QEMUFile *f, void *pv, size_t size)
> > >> +static void put_uint64(QEMUFile *f, void *pv, size_t size, VMStateField 
> > >> *field,
> > >> +                       QJSON *vmdesc)
> > >>  {
> > >>      uint64_t *v = pv;
> > >>      qemu_put_be64s(f, v);
> > >> @@ -716,7 +727,8 @@ const VMStateInfo vmstate_info_uint64 = {
> > >>  /* 64 bit unsigned int. See that the received value is the same than 
> > >> the one
> > >>     in the field */
> > >>  
> > >> -static int get_uint64_equal(QEMUFile *f, void *pv, size_t size)
> > >> +static int get_uint64_equal(QEMUFile *f, void *pv, size_t size,
> > >> +                            VMStateField *field)
> > >>  {
> > >>      uint64_t *v = pv;
> > >>      uint64_t v2;
> > >> @@ -737,7 +749,8 @@ const VMStateInfo vmstate_info_uint64_equal = {
> > >>  /* 8 bit int. See that the received value is the same than the one
> > >>     in the field */
> > >>  
> > >> -static int get_uint8_equal(QEMUFile *f, void *pv, size_t size)
> > >> +static int get_uint8_equal(QEMUFile *f, void *pv, size_t size,
> > >> +                           VMStateField *field)
> > >>  {
> > >>      uint8_t *v = pv;
> > >>      uint8_t v2;
> > >> @@ -758,7 +771,8 @@ const VMStateInfo vmstate_info_uint8_equal = {
> > >>  /* 16 bit unsigned int int. See that the received value is the same 
> > >> than the one
> > >>     in the field */
> > >>  
> > >> -static int get_uint16_equal(QEMUFile *f, void *pv, size_t size)
> > >> +static int get_uint16_equal(QEMUFile *f, void *pv, size_t size,
> > >> +                            VMStateField *field)
> > >>  {
> > >>      uint16_t *v = pv;
> > >>      uint16_t v2;
> > >> @@ -778,7 +792,8 @@ const VMStateInfo vmstate_info_uint16_equal = {
> > >>  
> > >>  /* floating point */
> > >>  
> > >> -static int get_float64(QEMUFile *f, void *pv, size_t size)
> > >> +static int get_float64(QEMUFile *f, void *pv, size_t size,
> > >> +                       VMStateField *field)
> > >>  {
> > >>      float64 *v = pv;
> > >>  
> > >> @@ -786,7 +801,8 @@ static int get_float64(QEMUFile *f, void *pv, size_t 
> > >> size)
> > >>      return 0;
> > >>  }
> > >>  
> > >> -static void put_float64(QEMUFile *f, void *pv, size_t size)
> > >> +static void put_float64(QEMUFile *f, void *pv, size_t size, 
> > >> VMStateField *field,
> > >> +                        QJSON *vmdesc)
> > >>  {
> > >>      uint64_t *v = pv;
> > >>  
> > >> @@ -801,7 +817,8 @@ const VMStateInfo vmstate_info_float64 = {
> > >>  
> > >>  /* CPU_DoubleU type */
> > >>  
> > >> -static int get_cpudouble(QEMUFile *f, void *pv, size_t size)
> > >> +static int get_cpudouble(QEMUFile *f, void *pv, size_t size,
> > >> +                         VMStateField *field)
> > >>  {
> > >>      CPU_DoubleU *v = pv;
> > >>      qemu_get_be32s(f, &v->l.upper);
> > >> @@ -809,7 +826,8 @@ static int get_cpudouble(QEMUFile *f, void *pv, 
> > >> size_t size)
> > >>      return 0;
> > >>  }
> > >>  
> > >> -static void put_cpudouble(QEMUFile *f, void *pv, size_t size)
> > >> +static void put_cpudouble(QEMUFile *f, void *pv, size_t size,
> > >> +                          VMStateField *field, QJSON *vmdesc)
> > >>  {
> > >>      CPU_DoubleU *v = pv;
> > >>      qemu_put_be32s(f, &v->l.upper);
> > >> @@ -824,14 +842,16 @@ const VMStateInfo vmstate_info_cpudouble = {
> > >>  
> > >>  /* uint8_t buffers */
> > >>  
> > >> -static int get_buffer(QEMUFile *f, void *pv, size_t size)
> > >> +static int get_buffer(QEMUFile *f, void *pv, size_t size,
> > >> +                      VMStateField *field)
> > >>  {
> > >>      uint8_t *v = pv;
> > >>      qemu_get_buffer(f, v, size);
> > >>      return 0;
> > >>  }
> > >>  
> > >> -static void put_buffer(QEMUFile *f, void *pv, size_t size)
> > >> +static void put_buffer(QEMUFile *f, void *pv, size_t size, VMStateField 
> > >> *field,
> > >> +                       QJSON *vmdesc)
> > >>  {
> > >>      uint8_t *v = pv;
> > >>      qemu_put_buffer(f, v, size);
> > >> @@ -846,7 +866,8 @@ const VMStateInfo vmstate_info_buffer = {
> > >>  /* unused buffers: space that was used for some fields that are
> > >>     not useful anymore */
> > >>  
> > >> -static int get_unused_buffer(QEMUFile *f, void *pv, size_t size)
> > >> +static int get_unused_buffer(QEMUFile *f, void *pv, size_t size,
> > >> +                             VMStateField *field)
> > >>  {
> > >>      uint8_t buf[1024];
> > >>      int block_len;
> > >> @@ -859,7 +880,8 @@ static int get_unused_buffer(QEMUFile *f, void *pv, 
> > >> size_t size)
> > >>     return 0;
> > >>  }
> > >>  
> > >> -static void put_unused_buffer(QEMUFile *f, void *pv, size_t size)
> > >> +static void put_unused_buffer(QEMUFile *f, void *pv, size_t size,
> > >> +                              VMStateField *field, QJSON *vmdesc)
> > >>  {
> > >>      static const uint8_t buf[1024];
> > >>      int block_len;
> > >> @@ -884,7 +906,7 @@ const VMStateInfo vmstate_info_unused_buffer = {
> > >>   */
> > >>  /* This is the number of 64 bit words sent over the wire */
> > >>  #define BITS_TO_U64S(nr) DIV_ROUND_UP(nr, 64)
> > >> -static int get_bitmap(QEMUFile *f, void *pv, size_t size)
> > >> +static int get_bitmap(QEMUFile *f, void *pv, size_t size, VMStateField 
> > >> *field)
> > >>  {
> > >>      unsigned long *bmp = pv;
> > >>      int i, idx = 0;
> > >> @@ -898,7 +920,8 @@ static int get_bitmap(QEMUFile *f, void *pv, size_t 
> > >> size)
> > >>      return 0;
> > >>  }
> > >>  
> > >> -static void put_bitmap(QEMUFile *f, void *pv, size_t size)
> > >> +static void put_bitmap(QEMUFile *f, void *pv, size_t size, VMStateField 
> > >> *field,
> > >> +                QJSON *vmdesc)
> > >>  {
> > >>      unsigned long *bmp = pv;
> > >>      int i, idx = 0;
> > >> diff --git a/target-alpha/machine.c b/target-alpha/machine.c
> > >> index 710b783..48e3278 100644
> > >> --- a/target-alpha/machine.c
> > >> +++ b/target-alpha/machine.c
> > >> @@ -5,14 +5,15 @@
> > >>  #include "hw/boards.h"
> > >>  #include "migration/cpu.h"
> > >>  
> > >> -static int get_fpcr(QEMUFile *f, void *opaque, size_t size)
> > >> +static int get_fpcr(QEMUFile *f, void *opaque, size_t size, 
> > >> VMStateField *field)
> > >>  {
> > >>      CPUAlphaState *env = opaque;
> > >>      cpu_alpha_store_fpcr(env, qemu_get_be64(f));
> > >>      return 0;
> > >>  }
> > >>  
> > >> -static void put_fpcr(QEMUFile *f, void *opaque, size_t size)
> > >> +static void put_fpcr(QEMUFile *f, void *opaque, size_t size,
> > >> +                     VMStateField *field, QJSON *vmdesc)
> > >>  {
> > >>      CPUAlphaState *env = opaque;
> > >>      qemu_put_be64(f, cpu_alpha_load_fpcr(env));
> > >> diff --git a/target-arm/machine.c b/target-arm/machine.c
> > >> index 7a6ca31..41a0de9 100644
> > >> --- a/target-arm/machine.c
> > >> +++ b/target-arm/machine.c
> > >> @@ -17,7 +17,8 @@ static bool vfp_needed(void *opaque)
> > >>      return arm_feature(env, ARM_FEATURE_VFP);
> > >>  }
> > >>  
> > >> -static int get_fpscr(QEMUFile *f, void *opaque, size_t size)
> > >> +static int get_fpscr(QEMUFile *f, void *opaque, size_t size,
> > >> +                     VMStateField *field)
> > >>  {
> > >>      ARMCPU *cpu = opaque;
> > >>      CPUARMState *env = &cpu->env;
> > >> @@ -27,7 +28,8 @@ static int get_fpscr(QEMUFile *f, void *opaque, size_t 
> > >> size)
> > >>      return 0;
> > >>  }
> > >>  
> > >> -static void put_fpscr(QEMUFile *f, void *opaque, size_t size)
> > >> +static void put_fpscr(QEMUFile *f, void *opaque, size_t size,
> > >> +                      VMStateField *field, QJSON *vmdesc)
> > >>  {
> > >>      ARMCPU *cpu = opaque;
> > >>      CPUARMState *env = &cpu->env;
> > >> @@ -163,7 +165,8 @@ static const VMStateDescription vmstate_pmsav7 = {
> > >>      }
> > >>  };
> > >>  
> > >> -static int get_cpsr(QEMUFile *f, void *opaque, size_t size)
> > >> +static int get_cpsr(QEMUFile *f, void *opaque, size_t size,
> > >> +                    VMStateField *field)
> > >>  {
> > >>      ARMCPU *cpu = opaque;
> > >>      CPUARMState *env = &cpu->env;
> > >> @@ -180,7 +183,8 @@ static int get_cpsr(QEMUFile *f, void *opaque, 
> > >> size_t size)
> > >>      return 0;
> > >>  }
> > >>  
> > >> -static void put_cpsr(QEMUFile *f, void *opaque, size_t size)
> > >> +static void put_cpsr(QEMUFile *f, void *opaque, size_t size,
> > >> +                     VMStateField *field, QJSON *vmdesc)
> > >>  {
> > >>      ARMCPU *cpu = opaque;
> > >>      CPUARMState *env = &cpu->env;
> > >> diff --git a/target-i386/machine.c b/target-i386/machine.c
> > >> index 71c0e4d..1df19e2 100644
> > >> --- a/target-i386/machine.c
> > >> +++ b/target-i386/machine.c
> > >> @@ -139,7 +139,8 @@ static const VMStateDescription vmstate_mtrr_var = {
> > >>  #define VMSTATE_MTRR_VARS(_field, _state, _n, _v)                    \
> > >>      VMSTATE_STRUCT_ARRAY(_field, _state, _n, _v, vmstate_mtrr_var, 
> > >> MTRRVar)
> > >>  
> > >> -static void put_fpreg_error(QEMUFile *f, void *opaque, size_t size)
> > >> +static void put_fpreg_error(QEMUFile *f, void *opaque, size_t size,
> > >> +                            VMStateField *field, QJSON *vmdesc)
> > >>  {
> > >>      fprintf(stderr, "call put_fpreg() with invalid arguments\n");
> > >>      exit(0);
> > >> @@ -167,7 +168,8 @@ static void fp64_to_fp80(union x86_longdouble *p, 
> > >> uint64_t temp)
> > >>      p->exp = e;
> > >>  }
> > >>  
> > >> -static int get_fpreg(QEMUFile *f, void *opaque, size_t size)
> > >> +static int get_fpreg(QEMUFile *f, void *opaque, size_t size,
> > >> +                     VMStateField *field)
> > >>  {
> > >>      FPReg *fp_reg = opaque;
> > >>      uint64_t mant;
> > >> @@ -179,7 +181,8 @@ static int get_fpreg(QEMUFile *f, void *opaque, 
> > >> size_t size)
> > >>      return 0;
> > >>  }
> > >>  
> > >> -static void put_fpreg(QEMUFile *f, void *opaque, size_t size)
> > >> +static void put_fpreg(QEMUFile *f, void *opaque, size_t size,
> > >> +                      VMStateField *field, QJSON *vmdesc)
> > >>  {
> > >>      FPReg *fp_reg = opaque;
> > >>      uint64_t mant;
> > >> @@ -197,7 +200,8 @@ static const VMStateInfo vmstate_fpreg = {
> > >>      .put  = put_fpreg,
> > >>  };
> > >>  
> > >> -static int get_fpreg_1_mmx(QEMUFile *f, void *opaque, size_t size)
> > >> +static int get_fpreg_1_mmx(QEMUFile *f, void *opaque, size_t size,
> > >> +                           VMStateField *field)
> > >>  {
> > >>      union x86_longdouble *p = opaque;
> > >>      uint64_t mant;
> > >> @@ -214,7 +218,8 @@ static const VMStateInfo vmstate_fpreg_1_mmx = {
> > >>      .put  = put_fpreg_error,
> > >>  };
> > >>  
> > >> -static int get_fpreg_1_no_mmx(QEMUFile *f, void *opaque, size_t size)
> > >> +static int get_fpreg_1_no_mmx(QEMUFile *f, void *opaque, size_t size,
> > >> +                              VMStateField *field)
> > >>  {
> > >>      union x86_longdouble *p = opaque;
> > >>      uint64_t mant;
> > >> @@ -276,14 +281,16 @@ static bool less_than_7(void *opaque, int 
> > >> version_id)
> > >>      return version_id < 7;
> > >>  }
> > >>  
> > >> -static int get_uint64_as_uint32(QEMUFile *f, void *pv, size_t size)
> > >> +static int get_uint64_as_uint32(QEMUFile *f, void *pv, size_t size,
> > >> +                                VMStateField *field)
> > >>  {
> > >>      uint64_t *v = pv;
> > >>      *v = qemu_get_be32(f);
> > >>      return 0;
> > >>  }
> > >>  
> > >> -static void put_uint64_as_uint32(QEMUFile *f, void *pv, size_t size)
> > >> +static void put_uint64_as_uint32(QEMUFile *f, void *pv, size_t size,
> > >> +                                 VMStateField *field, QJSON *vmdesc)
> > >>  {
> > >>      uint64_t *v = pv;
> > >>      qemu_put_be32(f, *v);
> > >> diff --git a/target-mips/machine.c b/target-mips/machine.c
> > >> index a27f2f1..179084c 100644
> > >> --- a/target-mips/machine.c
> > >> +++ b/target-mips/machine.c
> > >> @@ -20,7 +20,7 @@ static int cpu_post_load(void *opaque, int version_id)
> > >>  
> > >>  /* FPU state */
> > >>  
> > >> -static int get_fpr(QEMUFile *f, void *pv, size_t size)
> > >> +static int get_fpr(QEMUFile *f, void *pv, size_t size, VMStateField 
> > >> *field)
> > >>  {
> > >>      int i;
> > >>      fpr_t *v = pv;
> > >> @@ -31,7 +31,8 @@ static int get_fpr(QEMUFile *f, void *pv, size_t size)
> > >>      return 0;
> > >>  }
> > >>  
> > >> -static void put_fpr(QEMUFile *f, void *pv, size_t size)
> > >> +static void put_fpr(QEMUFile *f, void *pv, size_t size, VMStateField 
> > >> *field,
> > >> +                    QJSON *vmdesc)
> > >>  {
> > >>      int i;
> > >>      fpr_t *v = pv;
> > >> @@ -125,7 +126,7 @@ const VMStateDescription vmstate_mvp = {
> > >>  
> > >>  /* TLB state */
> > >>  
> > >> -static int get_tlb(QEMUFile *f, void *pv, size_t size)
> > >> +static int get_tlb(QEMUFile *f, void *pv, size_t size, VMStateField 
> > >> *field)
> > >>  {
> > >>      r4k_tlb_t *v = pv;
> > >>      uint16_t flags;
> > >> @@ -152,7 +153,8 @@ static int get_tlb(QEMUFile *f, void *pv, size_t 
> > >> size)
> > >>      return 0;
> > >>  }
> > >>  
> > >> -static void put_tlb(QEMUFile *f, void *pv, size_t size)
> > >> +static void put_tlb(QEMUFile *f, void *pv, size_t size, VMStateField 
> > >> *field,
> > >> +                    QJSON *vmdesc)
> > >>  {
> > >>      r4k_tlb_t *v = pv;
> > >>  
> > >> diff --git a/target-ppc/machine.c b/target-ppc/machine.c
> > >> index 4820f22..0e1822c 100644
> > >> --- a/target-ppc/machine.c
> > >> +++ b/target-ppc/machine.c
> > >> @@ -106,7 +106,7 @@ static int cpu_load_old(QEMUFile *f, void *opaque, 
> > >> int version_id)
> > >>      return 0;
> > >>  }
> > >>  
> > >> -static int get_avr(QEMUFile *f, void *pv, size_t size)
> > >> +static int get_avr(QEMUFile *f, void *pv, size_t size, VMStateField 
> > >> *field)
> > >>  {
> > >>      ppc_avr_t *v = pv;
> > >>  
> > >> @@ -116,7 +116,8 @@ static int get_avr(QEMUFile *f, void *pv, size_t 
> > >> size)
> > >>      return 0;
> > >>  }
> > >>  
> > >> -static void put_avr(QEMUFile *f, void *pv, size_t size)
> > >> +static void put_avr(QEMUFile *f, void *pv, size_t size, VMStateField 
> > >> *field,
> > >> +                    QJSON *vmdesc)
> > >>  {
> > >>      ppc_avr_t *v = pv;
> > >>  
> > >> @@ -324,7 +325,7 @@ static const VMStateDescription vmstate_sr = {
> > >>  };
> > >>  
> > >>  #ifdef TARGET_PPC64
> > >> -static int get_slbe(QEMUFile *f, void *pv, size_t size)
> > >> +static int get_slbe(QEMUFile *f, void *pv, size_t size, VMStateField 
> > >> *field)
> > >>  {
> > >>      ppc_slb_t *v = pv;
> > >>  
> > >> @@ -334,7 +335,8 @@ static int get_slbe(QEMUFile *f, void *pv, size_t 
> > >> size)
> > >>      return 0;
> > >>  }
> > >>  
> > >> -static void put_slbe(QEMUFile *f, void *pv, size_t size)
> > >> +static void put_slbe(QEMUFile *f, void *pv, size_t size, VMStateField 
> > >> *field,
> > >> +                     QJSON *vmdesc)
> > >>  {
> > >>      ppc_slb_t *v = pv;
> > >>  
> > >> diff --git a/target-sparc/machine.c b/target-sparc/machine.c
> > >> index 59c92f7..3194e03 100644
> > >> --- a/target-sparc/machine.c
> > >> +++ b/target-sparc/machine.c
> > >> @@ -59,7 +59,7 @@ static const VMStateDescription vmstate_tlb_entry = {
> > >>  };
> > >>  #endif
> > >>  
> > >> -static int get_psr(QEMUFile *f, void *opaque, size_t size)
> > >> +static int get_psr(QEMUFile *f, void *opaque, size_t size, VMStateField 
> > >> *field)
> > >>  {
> > >>      SPARCCPU *cpu = opaque;
> > >>      CPUSPARCState *env = &cpu->env;
> > >> @@ -72,7 +72,8 @@ static int get_psr(QEMUFile *f, void *opaque, size_t 
> > >> size)
> > >>      return 0;
> > >>  }
> > >>  
> > >> -static void put_psr(QEMUFile *f, void *opaque, size_t size)
> > >> +static void put_psr(QEMUFile *f, void *opaque, size_t size, 
> > >> VMStateField *field,
> > >> +                QJSON *vmdesc)
> > >>  {
> > >>      SPARCCPU *cpu = opaque;
> > >>      CPUSPARCState *env = &cpu->env;
> > >>
> > >>
> > 

-- 
David Gibson                    | I'll have my music baroque, and my code
david AT gibson.dropbear.id.au  | minimalist, thank you.  NOT _the_ _other_
                                | _way_ _around_!
http://www.ozlabs.org/~dgibson

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