ShuriZma
/
xemu
mirror of https://github.com/xemu-project/xemu.git
1
0
Fork 0
Code Issues Packages Projects Releases Wiki Activity

vfio-user: instantiate vfio-user context 

create a context with the vfio-user library to run a PCI device

Signed-off-by: Elena Ufimtseva <elena.ufimtseva@oracle.com>
Signed-off-by: John G Johnson <john.g.johnson@oracle.com>
Signed-off-by: Jagannathan Raman <jag.raman@oracle.com>
Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com>
Message-id: a452871ac8c812ff96fc4f0ce6037f4769953fab.1655151679.git.jag.raman@oracle.com
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
This commit is contained in:
Jagannathan Raman 2022-06-13 16:26:26 -04:00 committed by Stefan Hajnoczi
parent 8f9a9259d3
commit 87f7249ff6
1 changed files with 82 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

82
hw/remote/vfio-user-obj.c
View File

@ -40,6 +40,9 @@
#include "hw/remote/machine.h"
#include "qapi/error.h"
#include "qapi/qapi-visit-sockets.h"
#include "qemu/notify.h"
#include "sysemu/sysemu.h"
#include "libvfio-user.h"
#define TYPE_VFU_OBJECT "x-vfio-user-server"
OBJECT_DECLARE_TYPE(VfuObject, VfuObjectClass, VFU_OBJECT)
@ -73,8 +76,14 @@ struct VfuObject {
char *device;
Error *err;
Notifier machine_done;
vfu_ctx_t *vfu_ctx;
};
static void vfu_object_init_ctx(VfuObject *o, Error **errp);
static bool vfu_object_auto_shutdown(void)
{
bool auto_shutdown = true;
@ -107,6 +116,11 @@ static void vfu_object_set_socket(Object *obj, Visitor *v, const char *name,
{
VfuObject *o = VFU_OBJECT(obj);
if (o->vfu_ctx) {
error_setg(errp, "vfu: Unable to set socket property - server busy");
return;
}
qapi_free_SocketAddress(o->socket);
o->socket = NULL;
@ -122,17 +136,69 @@ static void vfu_object_set_socket(Object *obj, Visitor *v, const char *name,
}
trace_vfu_prop("socket", o->socket->u.q_unix.path);
vfu_object_init_ctx(o, errp);
}
static void vfu_object_set_device(Object *obj, const char *str, Error **errp)
{
VfuObject *o = VFU_OBJECT(obj);
if (o->vfu_ctx) {
error_setg(errp, "vfu: Unable to set device property - server busy");
return;
}
g_free(o->device);
o->device = g_strdup(str);
trace_vfu_prop("device", str);
vfu_object_init_ctx(o, errp);
}
/*
* TYPE_VFU_OBJECT depends on the availability of the 'socket' and 'device'
* properties. It also depends on devices instantiated in QEMU. These
* dependencies are not available during the instance_init phase of this
* object's life-cycle. As such, the server is initialized after the
* machine is setup. machine_init_done_notifier notifies TYPE_VFU_OBJECT
* when the machine is setup, and the dependencies are available.
*/
static void vfu_object_machine_done(Notifier *notifier, void *data)
{
VfuObject *o = container_of(notifier, VfuObject, machine_done);
Error *err = NULL;
vfu_object_init_ctx(o, &err);
if (err) {
error_propagate(&error_abort, err);
}
}
static void vfu_object_init_ctx(VfuObject *o, Error **errp)
{
ERRP_GUARD();
if (o->vfu_ctx || !o->socket || !o->device ||
!phase_check(PHASE_MACHINE_READY)) {
return;
}
if (o->err) {
error_propagate(errp, o->err);
o->err = NULL;
return;
}
o->vfu_ctx = vfu_create_ctx(VFU_TRANS_SOCK, o->socket->u.q_unix.path, 0,
o, VFU_DEV_TYPE_PCI);
if (o->vfu_ctx == NULL) {
error_setg(errp, "vfu: Failed to create context - %s", strerror(errno));
return;
}
}
static void vfu_object_init(Object *obj)
@ -147,6 +213,12 @@ static void vfu_object_init(Object *obj)
TYPE_VFU_OBJECT, TYPE_REMOTE_MACHINE);
return;
}
if (!phase_check(PHASE_MACHINE_READY)) {
o->machine_done.notify = vfu_object_machine_done;
qemu_add_machine_init_done_notifier(&o->machine_done);
}
}
static void vfu_object_finalize(Object *obj)
@ -160,6 +232,11 @@ static void vfu_object_finalize(Object *obj)
o->socket = NULL;
if (o->vfu_ctx) {
vfu_destroy_ctx(o->vfu_ctx);
o->vfu_ctx = NULL;
}
g_free(o->device);
o->device = NULL;
@ -167,6 +244,11 @@ static void vfu_object_finalize(Object *obj)
if (!k->nr_devs && vfu_object_auto_shutdown()) {
qemu_system_shutdown_request(SHUTDOWN_CAUSE_GUEST_SHUTDOWN);
}
if (o->machine_done.notify) {
qemu_remove_machine_init_done_notifier(&o->machine_done);
o->machine_done.notify = NULL;
}
}
static void vfu_object_class_init(ObjectClass *klass, void *data)