This new command lists all the instances of VirtIODevice with
their path and virtio type
Signed-off-by: Laurent Vivier <lviv...@redhat.com>
---
hw/virtio/Makefile.objs | 2 ++
hw/virtio/virtio-stub.c | 14 ++++++++
hw/virtio/virtio.c | 28 ++++++++++++++++
include/hw/virtio/virtio.h | 1 +
qapi/Makefile.objs | 2 +-
qapi/qapi-schema.json | 1 +
qapi/virtio.json | 68 ++++++++++++++++++++++++++++++++++++++
tests/qtest/qmp-cmd-test.c | 1 +
8 files changed, 116 insertions(+), 1 deletion(-)
create mode 100644 hw/virtio/virtio-stub.c
create mode 100644 qapi/virtio.json
diff --git a/hw/virtio/Makefile.objs b/hw/virtio/Makefile.objs
index 4e4d39a0a48f..0b649f120044 100644
--- a/hw/virtio/Makefile.objs
+++ b/hw/virtio/Makefile.objs
@@ -38,6 +38,8 @@ obj-$(CONFIG_VIRTIO_SERIAL) += virtio-serial-pci.o
endif
else
common-obj-y += vhost-stub.o
+common-obj-y += virtio-stub.o
endif
common-obj-$(CONFIG_ALL) += vhost-stub.o
+common-obj-$(CONFIG_ALL) += virtio-stub.o
diff --git a/hw/virtio/virtio-stub.c b/hw/virtio/virtio-stub.c
new file mode 100644
index 000000000000..d4a88f5753a9
--- /dev/null
+++ b/hw/virtio/virtio-stub.c
@@ -0,0 +1,14 @@
+#include "qemu/osdep.h"
+#include "qapi/error.h"
+#include "qapi/qapi-commands-virtio.h"
+
+static void *qmp_virtio_unsupported(Error **errp)
+{
+ error_setg(errp, "Virtio is disabled");
+ return NULL;
+}
+
+VirtioInfoList *qmp_x_debug_query_virtio(Error **errp)
+{
+ return qmp_virtio_unsupported(errp);
+}
diff --git a/hw/virtio/virtio.c b/hw/virtio/virtio.c
index b6c8ef5bc025..05b640bcc267 100644
--- a/hw/virtio/virtio.c
+++ b/hw/virtio/virtio.c
@@ -13,6 +13,8 @@
#include "qemu/osdep.h"
#include "qapi/error.h"
+#include "qapi/qapi-commands-virtio.h"
+#include "qapi/qapi-visit-virtio.h"
#include "cpu.h"
#include "trace.h"
#include "exec/address-spaces.h"
@@ -28,6 +30,8 @@
#include "sysemu/dma.h"
#include "sysemu/runstate.h"
+static QTAILQ_HEAD(, VirtIODevice) virtio_list;
+
/*
* The alignment to use between consumer and producer parts of vring.
* x86 pagesize again. This is the default, used by transports like PCI
@@ -3628,6 +3632,7 @@ static void virtio_device_realize(DeviceState *dev, Error
**errp)
vdev->listener.commit = virtio_memory_listener_commit;
memory_listener_register(&vdev->listener, vdev->dma_as);
+ QTAILQ_INSERT_TAIL(&virtio_list, vdev, next);
}
static void virtio_device_unrealize(DeviceState *dev, Error **errp)
@@ -3646,6 +3651,7 @@ static void virtio_device_unrealize(DeviceState *dev,
Error **errp)
}
}
+ QTAILQ_REMOVE(&virtio_list, vdev, next);
g_free(vdev->bus_name);
vdev->bus_name = NULL;
}
@@ -3802,6 +3808,8 @@ static void virtio_device_class_init(ObjectClass *klass,
void *data)
vdc->stop_ioeventfd = virtio_device_stop_ioeventfd_impl;
vdc->legacy_features |= VIRTIO_LEGACY_FEATURES;
+
+ QTAILQ_INIT(&virtio_list);
}
bool virtio_device_ioeventfd_enabled(VirtIODevice *vdev)
@@ -3812,6 +3820,26 @@ bool virtio_device_ioeventfd_enabled(VirtIODevice *vdev)
return virtio_bus_ioeventfd_enabled(vbus);
}
+VirtioInfoList *qmp_x_debug_query_virtio(Error **errp)
+{
+ VirtioInfoList *list = NULL;
+ VirtioInfoList *node;
+ VirtIODevice *vdev;
+
+ QTAILQ_FOREACH(vdev, &virtio_list, next) {
+ DeviceState *dev = DEVICE(vdev);
+ node = g_new0(VirtioInfoList, 1);
+ node->value = g_new(VirtioInfo, 1);
+ node->value->path = g_strdup(dev->canonical_path);
+ node->value->type = qapi_enum_parse(&VirtioType_lookup, vdev->name,
+ VIRTIO_TYPE_UNKNOWN, NULL);
+ node->next = list;
+ list = node;
+ }
+
+ return list;
+}
+
static const TypeInfo virtio_device_info = {
.name = TYPE_VIRTIO_DEVICE,
.parent = TYPE_DEVICE,
diff --git a/include/hw/virtio/virtio.h b/include/hw/virtio/virtio.h
index b69d51749635..65adce680188 100644
--- a/include/hw/virtio/virtio.h
+++ b/include/hw/virtio/virtio.h
@@ -111,6 +111,7 @@ struct VirtIODevice
bool use_guest_notifier_mask;
AddressSpace *dma_as;
QLIST_HEAD(, VirtQueue) *vector_queues;
+ QTAILQ_ENTRY(VirtIODevice) next;
};
typedef struct VirtioDeviceClass {
diff --git a/qapi/Makefile.objs b/qapi/Makefile.objs
index 4673ab7490df..4fae2e37cfc9 100644
--- a/qapi/Makefile.objs
+++ b/qapi/Makefile.objs
@@ -8,7 +8,7 @@ util-obj-y += qapi-util.o
QAPI_COMMON_MODULES = audio authz block-core block char common control crypto
QAPI_COMMON_MODULES += dump error introspect job machine migration misc
QAPI_COMMON_MODULES += net pragma qdev qom rdma rocker run-state sockets tpm
-QAPI_COMMON_MODULES += trace transaction ui
+QAPI_COMMON_MODULES += trace transaction ui virtio
QAPI_TARGET_MODULES = machine-target misc-target
QAPI_MODULES = $(QAPI_COMMON_MODULES) $(QAPI_TARGET_MODULES)
diff --git a/qapi/qapi-schema.json b/qapi/qapi-schema.json
index 43b0ba0dea22..189f5a0a7383 100644
--- a/qapi/qapi-schema.json
+++ b/qapi/qapi-schema.json
@@ -84,3 +84,4 @@
{ 'include': 'misc.json' }
{ 'include': 'misc-target.json' }
{ 'include': 'audio.json' }
+{ 'include': 'virtio.json' }
diff --git a/qapi/virtio.json b/qapi/virtio.json
new file mode 100644
index 000000000000..da59a118dbfb
--- /dev/null
+++ b/qapi/virtio.json
@@ -0,0 +1,68 @@
+##
+# = Virtio devices
+##
+
+##
+# @VirtioType:
+#
+# An enumeration of Virtio device types.
+#
+# Since: 5.1.0
+##
+{ 'enum': 'VirtioType',
+ 'data': [ 'unknown', 'virtio-9p', 'virtio-blk', 'virtio-serial',
+ 'virtio-gpu', 'virtio-input', 'virtio-net', 'virtio-scsi',
+ 'vhost-user-fs', 'vhost-vsock', 'virtio-balloon', 'virtio-crypto',
+ 'virtio-iommu', 'virtio-pmem', 'virtio-rng' ]
+}
+
+##
+# @VirtioInfo:
+#
+# Information about a given VirtIODevice
+#
+# @path: VirtIO device canonical path.
+#
+# @type: VirtIO device type.
+#
+# Since: 5.1
+#
+##
+{ 'struct': 'VirtioInfo',
+ 'data': {
+ 'path': 'str',
+ 'type': 'VirtioType'
+ }
+}
+
+##
+# @x-debug-query-virtio:
+#
+# Return the list of all VirtIO devices
+#
+# Returns: list of @VirtioInfo
+#
+# Since: 5.1
+#
+# Example:
+#
+# -> { "execute": "x-debug-query-virtio" }
+# <- { "return": [
+# {
+# "path": "/machine/peripheral-anon/device[3]/virtio-backend",
+# "type": "virtio-net"
+# },
+# {
+# "path": "/machine/peripheral-anon/device[1]/virtio-backend",
+# "type": "virtio-serial"
+# },
+# {
+# "path": "/machine/peripheral-anon/device[0]/virtio-backend",
+# "type": "virtio-blk"
+# }
+# ]
+# }
+#
+##
+
+{ 'command': 'x-debug-query-virtio', 'returns': ['VirtioInfo'] }
diff --git a/tests/qtest/qmp-cmd-test.c b/tests/qtest/qmp-cmd-test.c
index 9f5228cd9951..a7bf8aab6357 100644
--- a/tests/qtest/qmp-cmd-test.c
+++ b/tests/qtest/qmp-cmd-test.c
@@ -92,6 +92,7 @@ static bool query_is_blacklisted(const char *cmd)
"query-gic-capabilities", /* arm */
/* Success depends on target-specific build configuration: */
"query-pci", /* CONFIG_PCI */
+ "x-debug-query-virtio", /* CONFIG_VIRTIO */
/* Success depends on launching SEV guest */
"query-sev-launch-measure",
/* Success depends on Host or Hypervisor SEV support */
--
2.26.2
