Add command-line parameters (x-plugin-path and x-plugin-arg) of migration plugin
for VFIO PCI functions. x-plugin-path indicates the path of a dynamic load
library and x-plugin-arg is the necessary parameter to load and use it.
A typical example is, if the plugin communicates with the agent running on
IPU/DPU backend SOC through network, the argument should be the IP and Port of
agent. The usage as follows:
-device vfio-pci,id=$ID,host=$bdf,x-enable-migration,\
x-plugin-path=$plugin_path,x-plugin-arg=<IP:Port>
Signed-off-by: Lei Rao <lei....@intel.com>
Reviewed-by: Eddie Dong <eddie.d...@intel.com>
---
hw/vfio/pci.c | 2 ++
include/hw/vfio/vfio-common.h | 6 ++++++
2 files changed, 8 insertions(+)
diff --git a/hw/vfio/pci.c b/hw/vfio/pci.c
index 939dcc3d4a..1553ba7116 100644
--- a/hw/vfio/pci.c
+++ b/hw/vfio/pci.c
@@ -3309,6 +3309,8 @@ static Property vfio_pci_dev_properties[] = {
qdev_prop_nv_gpudirect_clique, uint8_t),
DEFINE_PROP_OFF_AUTO_PCIBAR("x-msix-relocation", VFIOPCIDevice, msix_relo,
OFF_AUTOPCIBAR_OFF),
+ DEFINE_PROP_STRING("x-plugin-path", VFIOPCIDevice, vbasedev.desc.path),
+ DEFINE_PROP_STRING("x-plugin-arg", VFIOPCIDevice, vbasedev.desc.arg),
/*
* TODO - support passed fds... is this necessary?
* DEFINE_PROP_STRING("vfiofd", VFIOPCIDevice, vfiofd_name),
diff --git a/include/hw/vfio/vfio-common.h b/include/hw/vfio/vfio-common.h
index be8adf890f..45d6d75284 100644
--- a/include/hw/vfio/vfio-common.h
+++ b/include/hw/vfio/vfio-common.h
@@ -58,6 +58,11 @@ typedef struct VFIORegion {
uint8_t nr; /* cache the region number for debug */
} VFIORegion;
+struct vfio_migration_plugin_desc {
+ char *path;
+ char *arg;
+};
+
typedef struct VFIOMigrationOps VFIOMigrationOps;
typedef struct VFIOMigration {
@@ -144,6 +149,7 @@ typedef struct VFIODevice {
unsigned int num_regions;
unsigned int flags;
VFIOMigration *migration;
+ struct vfio_migration_plugin_desc desc;
Error *migration_blocker;
OnOffAuto pre_copy_dirty_page_tracking;
} VFIODevice;
--
2.32.0
