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virtio-scsi: add backwards-compatibility properties for 1.1 and earlier machines

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Hotplug and parameter change are new in 1.2, disable them via compat
properties for pc-1.1 and earlier.

Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
This commit is contained in:
Paolo Bonzini 2012-08-20 15:23:28 +02:00
parent 1bd075f29e
commit 07a5298c30
3 changed files with 16 additions and 8 deletions
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8
hw/pc_piix.c
View File

@ -360,6 +360,14 @@ static QEMUMachine pc_machine_v1_2 = {
#define PC_COMPAT_1_1 \
{\
.driver = "virtio-scsi-pci",\
.property = "hotplug",\
.value = "off",\
},{\
.driver = "virtio-scsi-pci",\
.property = "param_change",\
.value = "off",\
},{\
.driver = "VGA",\
.property = "vgamem_mb",\
.value = stringify(8),\

7
hw/virtio-scsi.c
View File

@ -24,11 +24,6 @@
#define VIRTIO_SCSI_MAX_TARGET 255
#define VIRTIO_SCSI_MAX_LUN 16383
/* Feature Bits */
#define VIRTIO_SCSI_F_INOUT 0
#define VIRTIO_SCSI_F_HOTPLUG 1
#define VIRTIO_SCSI_F_CHANGE 2
/* Response codes */
#define VIRTIO_SCSI_S_OK 0
#define VIRTIO_SCSI_S_OVERRUN 1
@ -561,8 +556,6 @@ static void virtio_scsi_set_config(VirtIODevice *vdev,
static uint32_t virtio_scsi_get_features(VirtIODevice *vdev,
uint32_t requested_features)
{
requested_features |= (1UL << VIRTIO_SCSI_F_HOTPLUG);
requested_features |= (1UL << VIRTIO_SCSI_F_CHANGE);
return requested_features;
}

9
hw/virtio-scsi.h
View File

@ -21,6 +21,11 @@
/* The ID for virtio_scsi */
#define VIRTIO_ID_SCSI 8
/* Feature Bits */
#define VIRTIO_SCSI_F_INOUT 0
#define VIRTIO_SCSI_F_HOTPLUG 1
#define VIRTIO_SCSI_F_CHANGE 2
struct VirtIOSCSIConf {
uint32_t num_queues;
uint32_t max_sectors;
@ -31,6 +36,8 @@ struct VirtIOSCSIConf {
DEFINE_VIRTIO_COMMON_FEATURES(_state, _features_field), \
DEFINE_PROP_UINT32("num_queues", _state, _conf_field.num_queues, 1), \
DEFINE_PROP_UINT32("max_sectors", _state, _conf_field.max_sectors, 0xFFFF), \
DEFINE_PROP_UINT32("cmd_per_lun", _state, _conf_field.cmd_per_lun, 128)
DEFINE_PROP_UINT32("cmd_per_lun", _state, _conf_field.cmd_per_lun, 128), \
DEFINE_PROP_BIT("hotplug", _state, _features_field, VIRTIO_SCSI_F_HOTPLUG, true), \
DEFINE_PROP_BIT("param_change", _state, _features_field, VIRTIO_SCSI_F_CHANGE, true)
#endif /* _QEMU_VIRTIO_SCSI_H */