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| author | Jan Kiszka <jan.kiszka@siemens.com> | 2012-01-23 20:15:11 +0100 |
|---|---|---|
| committer | Anthony Liguori <aliguori@us.ibm.com> | 2012-02-01 14:45:01 -0600 |
| commit | 4e4fa398db69e22dcad23114eb7e33b4d89b10c4 (patch) | |
| tree | 81164d18007857c81ed538a4a610578a40d28829 /hw/qdev.h | |
| parent | 67ed96f9f25ddd69e23c455d44d389054addf165 (diff) | |
| download | qemu-4e4fa398db69e22dcad23114eb7e33b4d89b10c4.tar.gz | |
qdev: Introduce lost tick policy property
Potentially tick-generating timer devices will gain a common property:
lock_tick_policy. It allows to encode 4 different ways how to deal with
tick events the guest did not process in time:
discard - ignore lost ticks (e.g. if the guest compensates for them
already)
delay - replay all lost ticks in a row once the guest accepts them
again
merge - if multiple ticks are lost, all of them are merged into one
which is replayed once the guest accepts it again
slew - lost ticks are gradually replayed at a higher frequency than
the original tick
Not all timer device will need to support all modes. However, all need
to accept the configuration via this common property.
Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
Diffstat (limited to 'hw/qdev.h')
| -rw-r--r-- | hw/qdev.h | 7 |
1 files changed, 7 insertions, 0 deletions
@@ -158,6 +158,7 @@ enum PropertyType { PROP_TYPE_UINT64, PROP_TYPE_TADDR, PROP_TYPE_MACADDR, + PROP_TYPE_LOSTTICKPOLICY, PROP_TYPE_DRIVE, PROP_TYPE_CHR, PROP_TYPE_STRING, @@ -307,6 +308,7 @@ extern PropertyInfo qdev_prop_string; extern PropertyInfo qdev_prop_chr; extern PropertyInfo qdev_prop_ptr; extern PropertyInfo qdev_prop_macaddr; +extern PropertyInfo qdev_prop_losttickpolicy; extern PropertyInfo qdev_prop_drive; extern PropertyInfo qdev_prop_netdev; extern PropertyInfo qdev_prop_vlan; @@ -367,6 +369,9 @@ extern PropertyInfo qdev_prop_pci_devfn; DEFINE_PROP(_n, _s, _f, qdev_prop_drive, BlockDriverState *) #define DEFINE_PROP_MACADDR(_n, _s, _f) \ DEFINE_PROP(_n, _s, _f, qdev_prop_macaddr, MACAddr) +#define DEFINE_PROP_LOSTTICKPOLICY(_n, _s, _f, _d) \ + DEFINE_PROP_DEFAULT(_n, _s, _f, _d, qdev_prop_losttickpolicy, \ + LostTickPolicy) #define DEFINE_PROP_END_OF_LIST() \ {} @@ -389,6 +394,8 @@ void qdev_prop_set_vlan(DeviceState *dev, const char *name, VLANState *value); int qdev_prop_set_drive(DeviceState *dev, const char *name, BlockDriverState *value) QEMU_WARN_UNUSED_RESULT; void qdev_prop_set_drive_nofail(DeviceState *dev, const char *name, BlockDriverState *value); void qdev_prop_set_macaddr(DeviceState *dev, const char *name, uint8_t *value); +void qdev_prop_set_losttickpolicy(DeviceState *dev, const char *name, + LostTickPolicy *value); /* FIXME: Remove opaque pointer properties. */ void qdev_prop_set_ptr(DeviceState *dev, const char *name, void *value); void qdev_prop_set_defaults(DeviceState *dev, Property *props); |