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envelope-from=jag.raman@oracle.com; helo=mx0a-00069f02.pphosted.com X-Spam_score_int: -27 X-Spam_score: -2.8 X-Spam_bar: -- X-Spam_report: (-2.8 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, MSGID_FROM_MTA_HEADER=0.001, RCVD_IN_DNSWL_LOW=-0.7, RCVD_IN_MSPIKE_H2=-0.001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: elena.ufimtseva@oracle.com, john.g.johnson@oracle.com, thuth@redhat.com, jag.raman@oracle.com, swapnil.ingle@nutanix.com, john.levon@nutanix.com, philmd@redhat.com, alex.williamson@redhat.com, marcandre.lureau@gmail.com, stefanha@redhat.com, thanos.makatos@nutanix.com, alex.bennee@linaro.org Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" Define vfio-user object which is remote process server for QEMU. Setup object initialization functions and properties necessary to instantiate the object Signed-off-by: Elena Ufimtseva Signed-off-by: John G Johnson Signed-off-by: Jagannathan Raman --- qapi/qom.json | 20 ++++++- hw/remote/vfio-user-obj.c | 145 ++++++++++++++++++++++++++++++++++++++++++++++ MAINTAINERS | 1 + hw/remote/meson.build | 1 + hw/remote/trace-events | 3 + 5 files changed, 168 insertions(+), 2 deletions(-) create mode 100644 hw/remote/vfio-user-obj.c diff --git a/qapi/qom.json b/qapi/qom.json index a25616b..3e941ee 100644 --- a/qapi/qom.json +++ b/qapi/qom.json @@ -689,6 +689,20 @@ 'data': { 'fd': 'str', 'devid': 'str' } } ## +# @VfioUserProperties: +# +# Properties for vfio-user objects. +# +# @socket: path to be used as socket by the libvfiouser library +# +# @devid: the id of the device to be associated with the file descriptor +# +# Since: 6.0 +## +{ 'struct': 'VfioUserProperties', + 'data': { 'socket': 'str', 'devid': 'str' } } + +## # @RngProperties: # # Properties for objects of classes derived from rng. @@ -812,7 +826,8 @@ 'tls-creds-psk', 'tls-creds-x509', 'tls-cipher-suites', - 'x-remote-object' + 'x-remote-object', + 'vfio-user' ] } ## @@ -868,7 +883,8 @@ 'tls-creds-psk': 'TlsCredsPskProperties', 'tls-creds-x509': 'TlsCredsX509Properties', 'tls-cipher-suites': 'TlsCredsProperties', - 'x-remote-object': 'RemoteObjectProperties' + 'x-remote-object': 'RemoteObjectProperties', + 'vfio-user': 'VfioUserProperties' } } ## diff --git a/hw/remote/vfio-user-obj.c b/hw/remote/vfio-user-obj.c new file mode 100644 index 0000000..4a1e297 --- /dev/null +++ b/hw/remote/vfio-user-obj.c @@ -0,0 +1,145 @@ +/** + * QEMU vfio-user server object + * + * Copyright © 2021 Oracle and/or its affiliates. + * + * This work is licensed under the terms of the GNU GPL-v2, version 2 or later. + * + * See the COPYING file in the top-level directory. + * + */ + +/** + * Usage: add options: + * -machine x-remote + * -device ,id= + * -object vfio-user,id=,socket=,devid= + * + * Note that vfio-user object must be used with x-remote machine only. This + * server could only support PCI devices for now. + * + * socket is path to a file. This file will be created by the server. It is + * a required option + * + * devid is the id of a PCI device on the server. It is also a required option. + */ + +#include "qemu/osdep.h" +#include "qemu-common.h" + +#include "qom/object.h" +#include "qom/object_interfaces.h" +#include "qemu/error-report.h" +#include "trace.h" +#include "sysemu/runstate.h" + +#define TYPE_VFU_OBJECT "vfio-user" +OBJECT_DECLARE_TYPE(VfuObject, VfuObjectClass, VFU_OBJECT) + +struct VfuObjectClass { + ObjectClass parent_class; + + unsigned int nr_devs; + + /* Maximum number of devices the server could support */ + unsigned int max_devs; +}; + +struct VfuObject { + /* private */ + Object parent; + + char *socket; + char *devid; +}; + +static void vfu_object_set_socket(Object *obj, const char *str, Error **errp) +{ + VfuObject *o = VFU_OBJECT(obj); + + g_free(o->socket); + + o->socket = g_strdup(str); + + trace_vfu_prop("socket", str); +} + +static void vfu_object_set_devid(Object *obj, const char *str, Error **errp) +{ + VfuObject *o = VFU_OBJECT(obj); + + g_free(o->devid); + + o->devid = g_strdup(str); + + trace_vfu_prop("devid", str); +} + +static void vfu_object_init(Object *obj) +{ + VfuObjectClass *k = VFU_OBJECT_GET_CLASS(obj); + + if (!object_dynamic_cast(OBJECT(current_machine), TYPE_REMOTE_MACHINE)) { + error_report("vfu: %s only compatible with %s machine", + TYPE_VFU_OBJECT, TYPE_REMOTE_MACHINE); + return; + } + + if (k->nr_devs >= k->max_devs) { + error_report("Reached maximum number of vfio-user devices: %u", + k->max_devs); + return; + } + + k->nr_devs++; +} + +static void vfu_object_finalize(Object *obj) +{ + VfuObjectClass *k = VFU_OBJECT_GET_CLASS(obj); + VfuObject *o = VFU_OBJECT(obj); + + k->nr_devs--; + + g_free(o->socket); + g_free(o->devid); + + if (k->nr_devs == 0) { + qemu_system_shutdown_request(SHUTDOWN_CAUSE_GUEST_SHUTDOWN); + } +} + +static void vfu_object_class_init(ObjectClass *klass, void *data) +{ + VfuObjectClass *k = VFU_OBJECT_CLASS(klass); + + /* Limiting maximum number of devices to 1 until IOMMU support is added */ + k->max_devs = 1; + k->nr_devs = 0; + + object_class_property_add_str(klass, "socket", NULL, + vfu_object_set_socket); + object_class_property_add_str(klass, "devid", NULL, + vfu_object_set_devid); +} + +static const TypeInfo vfu_object_info = { + .name = TYPE_VFU_OBJECT, + .parent = TYPE_OBJECT, + .instance_size = sizeof(VfuObject), + .instance_init = vfu_object_init, + .instance_finalize = vfu_object_finalize, + .class_size = sizeof(VfuObjectClass), + .class_init = vfu_object_class_init, + .interfaces = (InterfaceInfo[]) { + { TYPE_USER_CREATABLE }, + { } + } +}; + +static void vfu_register_types(void) +{ + type_register_static(&vfu_object_info); +} + +type_init(vfu_register_types); diff --git a/MAINTAINERS b/MAINTAINERS index 0c5a18e..f9d8092 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -3391,6 +3391,7 @@ F: hw/remote/proxy-memory-listener.c F: include/hw/remote/proxy-memory-listener.h F: hw/remote/iohub.c F: include/hw/remote/iohub.h +F: hw/remote/vfio-user-obj.c EBPF: M: Jason Wang diff --git a/hw/remote/meson.build b/hw/remote/meson.build index fb35fb8..cd44dfc 100644 --- a/hw/remote/meson.build +++ b/hw/remote/meson.build @@ -6,6 +6,7 @@ remote_ss.add(when: 'CONFIG_MULTIPROCESS', if_true: files('message.c')) remote_ss.add(when: 'CONFIG_MULTIPROCESS', if_true: files('remote-obj.c')) remote_ss.add(when: 'CONFIG_MULTIPROCESS', if_true: files('proxy.c')) remote_ss.add(when: 'CONFIG_MULTIPROCESS', if_true: files('iohub.c')) +remote_ss.add(when: 'CONFIG_MULTIPROCESS', if_true: files('vfio-user-obj.c')) remote_ss.add(when: 'CONFIG_MULTIPROCESS', if_true: vfiouser) diff --git a/hw/remote/trace-events b/hw/remote/trace-events index 0b23974..7da12f0 100644 --- a/hw/remote/trace-events +++ b/hw/remote/trace-events @@ -2,3 +2,6 @@ mpqemu_send_io_error(int cmd, int size, int nfds) "send command %d size %d, %d file descriptors to remote process" mpqemu_recv_io_error(int cmd, int size, int nfds) "failed to receive %d size %d, %d file descriptors to remote process" + +# vfio-user-obj.c +vfu_prop(const char *prop, const char *val) "vfu: setting %s as %s" -- 1.8.3.1