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qemuBuildHostdevCommandLine: Format PCI host devices via JSON

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For properties we use these are the QEMU types:
  host=<str>             - Address (bus/device/function) of the host device, example: 04:10.0
  bootindex=<int32>
  failover_pair_id=<str>

Signed-off-by: Peter Krempa <pkrempa@redhat.com>
Reviewed-by: Ján Tomko <jtomko@redhat.com>
This commit is contained in:
Peter Krempa 2021-10-01 22:28:59 +02:00
parent c3b1bd723e
commit fcf96b11ba
3 changed files with 43 additions and 38 deletions
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69
src/qemu/qemu_command.c
View File

@ -4732,20 +4732,23 @@ qemuBuildVideoCommandLine(virCommand *cmd,
}
char *
qemuBuildPCIHostdevDevStr(const virDomainDef *def,
virDomainHostdevDef *dev,
virQEMUCaps *qemuCaps G_GNUC_UNUSED)
virJSONValue *
qemuBuildPCIHostdevDevProps(const virDomainDef *def,
virDomainHostdevDef *dev)
{
g_auto(virBuffer) buf = VIR_BUFFER_INITIALIZER;
g_autoptr(virJSONValue) props = NULL;
virDomainHostdevSubsysPCI *pcisrc = &dev->source.subsys.u.pci;
int backend = pcisrc->backend;
virDomainNetTeamingInfo *teaming;
g_autofree char *host = g_strdup_printf(VIR_PCI_DEVICE_ADDRESS_FMT,
pcisrc->addr.domain,
pcisrc->addr.bus,
pcisrc->addr.slot,
pcisrc->addr.function);
const char *failover_pair_id = NULL;
/* caller has to assign proper passthrough backend type */
switch ((virDomainHostdevSubsysPCIBackendType)backend) {
switch ((virDomainHostdevSubsysPCIBackendType) pcisrc->backend) {
case VIR_DOMAIN_HOSTDEV_PCI_BACKEND_VFIO:
virBufferAddLit(&buf, "vfio-pci");
break;
case VIR_DOMAIN_HOSTDEV_PCI_BACKEND_KVM:
@ -4754,25 +4757,10 @@ qemuBuildPCIHostdevDevStr(const virDomainDef *def,
case VIR_DOMAIN_HOSTDEV_PCI_BACKEND_TYPE_LAST:
virReportError(VIR_ERR_INTERNAL_ERROR,
_("invalid PCI passthrough type '%s'"),
virDomainHostdevSubsysPCIBackendTypeToString(backend));
virDomainHostdevSubsysPCIBackendTypeToString(pcisrc->backend));
return NULL;
}
virBufferAddLit(&buf, ",host=");
virBufferAsprintf(&buf,
VIR_PCI_DEVICE_ADDRESS_FMT,
pcisrc->addr.domain,
pcisrc->addr.bus,
pcisrc->addr.slot,
pcisrc->addr.function);
virBufferAsprintf(&buf, ",id=%s", dev->info->alias);
if (dev->info->effectiveBootIndex > 0)
virBufferAsprintf(&buf, ",bootindex=%u", dev->info->effectiveBootIndex);
if (qemuBuildDeviceAddressStr(&buf, def, dev->info) < 0)
return NULL;
if (qemuBuildRomStr(&buf, dev->info) < 0)
return NULL;
if (dev->parentnet)
teaming = dev->parentnet->teaming;
else
@ -4780,11 +4768,29 @@ qemuBuildPCIHostdevDevStr(const virDomainDef *def,
if (teaming &&
teaming->type == VIR_DOMAIN_NET_TEAMING_TYPE_TRANSIENT &&
teaming->persistent) {
virBufferAsprintf(&buf, ",failover_pair_id=%s", teaming->persistent);
}
teaming->persistent)
failover_pair_id = teaming->persistent;
return virBufferContentAndReset(&buf);
if (virJSONValueObjectCreate(&props,
"s:driver", "vfio-pci",
"s:host", host,
"s:id", dev->info->alias,
"p:bootindex", dev->info->effectiveBootIndex,
NULL) < 0)
return NULL;
if (qemuBuildDeviceAddressProps(props, def, dev->info) < 0)
return NULL;
if (qemuBuildRomProps(props, dev->info) < 0)
return NULL;
if (virJSONValueObjectAdd(props,
"S:failover_pair_id", failover_pair_id,
NULL) < 0)
return NULL;
return g_steal_pointer(&props);
}
@ -5536,12 +5542,11 @@ qemuBuildHostdevCommandLine(virCommand *cmd,
if (qemuCommandAddExtDevice(cmd, hostdev->info, qemuCaps) < 0)
return -1;
virCommandAddArg(cmd, "-device");
devstr = qemuBuildPCIHostdevDevStr(def, hostdev, qemuCaps);
if (!devstr)
if (!(devprops = qemuBuildPCIHostdevDevProps(def, hostdev)))
return -1;
virCommandAddArg(cmd, devstr);
if (qemuBuildDeviceCommandlineFromJSON(cmd, devprops, qemuCaps) < 0)
return -1;
break;
/* SCSI */

6
src/qemu/qemu_command.h
View File

@ -165,9 +165,9 @@ qemuBuildMemoryDeviceProps(const virDomainDef *def,
virDomainMemoryDef *mem);
/* Current, best practice */
char *qemuBuildPCIHostdevDevStr(const virDomainDef *def,
virDomainHostdevDef *dev,
virQEMUCaps *qemuCaps);
virJSONValue *
qemuBuildPCIHostdevDevProps(const virDomainDef *def,
virDomainHostdevDef *dev);
virJSONValue *
qemuBuildRNGDevProps(const virDomainDef *def,

6
src/qemu/qemu_hotplug.c
View File

@ -1629,7 +1629,7 @@ qemuDomainAttachHostPCIDevice(virQEMUDriver *driver,
{ .hostdev = hostdev } };
virDomainDeviceInfo *info = hostdev->info;
int ret;
g_autofree char *devstr = NULL;
g_autoptr(virJSONValue) devprops = NULL;
bool releaseaddr = false;
bool teardowncgroup = false;
bool teardownlabel = false;
@ -1706,7 +1706,7 @@ qemuDomainAttachHostPCIDevice(virQEMUDriver *driver,
goto error;
}
if (!(devstr = qemuBuildPCIHostdevDevStr(vm->def, hostdev, priv->qemuCaps)))
if (!(devprops = qemuBuildPCIHostdevDevProps(vm->def, hostdev)))
goto error;
qemuDomainObjEnterMonitor(driver, vm);
@ -1714,7 +1714,7 @@ qemuDomainAttachHostPCIDevice(virQEMUDriver *driver,
if ((ret = qemuDomainAttachExtensionDevice(priv->mon, hostdev->info)) < 0)
goto exit_monitor;
if ((ret = qemuMonitorAddDevice(priv->mon, devstr)) < 0)
if ((ret = qemuMonitorAddDeviceProps(priv->mon, &devprops)) < 0)
ignore_value(qemuDomainDetachExtensionDevice(priv->mon, hostdev->info));
exit_monitor: