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charset="utf-8" add the libvfio-user library as a submodule. build it as part of QEMU Signed-off-by: Elena Ufimtseva Signed-off-by: John G Johnson Signed-off-by: Jagannathan Raman --- configure | 11 +++++++++++ meson.build | 35 +++++++++++++++++++++++++++++++++++ .gitmodules | 3 +++ MAINTAINERS | 7 +++++++ hw/remote/meson.build | 2 ++ libvfio-user | 1 + 6 files changed, 59 insertions(+) create mode 160000 libvfio-user diff --git a/configure b/configure index 49b5481..bc1c961 100755 --- a/configure +++ b/configure @@ -4297,6 +4297,17 @@ but not implemented on your system" fi =20 ########################################## +# check for multiprocess + +case "$multiprocess" in + auto | enabled ) + if test "$git_submodules_action" !=3D "ignore"; then + git_submodules=3D"${git_submodules} libvfio-user" + fi + ;; +esac + +########################################## # End of CC checks # After here, no more $cc or $ld runs =20 diff --git a/meson.build b/meson.build index 6e4d2d8..f2f9f86 100644 --- a/meson.build +++ b/meson.build @@ -1894,6 +1894,41 @@ if get_option('cfi') and slirp_opt =3D=3D 'system' + ' Please configure with --enable-slirp=3Dgit') endif =20 +vfiouser =3D not_found +if have_system and multiprocess_allowed + have_internal =3D fs.exists(meson.current_source_dir() / 'libvfio-user/M= akefile') + + if not have_internal + error('libvfio-user source not found - please pull git submodule') + endif + + vfiouser_files =3D [ + 'libvfio-user/lib/dma.c', + 'libvfio-user/lib/irq.c', + 'libvfio-user/lib/libvfio-user.c', + 'libvfio-user/lib/migration.c', + 'libvfio-user/lib/pci.c', + 'libvfio-user/lib/pci_caps.c', + 'libvfio-user/lib/tran_sock.c', + ] + + vfiouser_inc =3D include_directories('libvfio-user/include', 'libvfio-us= er/lib') + + json_c =3D dependency('json-c', required: false) + if not json_c.found() + json_c =3D dependency('libjson-c') + endif + + libvfiouser =3D static_library('vfiouser', + build_by_default: false, + sources: vfiouser_files, + dependencies: json_c, + include_directories: vfiouser_inc) + + vfiouser =3D declare_dependency(link_with: libvfiouser, + include_directories: vfiouser_inc) +endif + fdt =3D not_found fdt_opt =3D get_option('fdt') if have_system diff --git a/.gitmodules b/.gitmodules index 08b1b48..a583a39 100644 --- a/.gitmodules +++ b/.gitmodules @@ -64,3 +64,6 @@ [submodule "roms/vbootrom"] path =3D roms/vbootrom url =3D https://gitlab.com/qemu-project/vbootrom.git +[submodule "libvfio-user"] + path =3D libvfio-user + url =3D https://github.com/nutanix/libvfio-user.git diff --git a/MAINTAINERS b/MAINTAINERS index aa4df6c..99646e7 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -3350,6 +3350,13 @@ F: semihosting/ F: include/semihosting/ F: tests/tcg/multiarch/arm-compat-semi/ =20 +libvfio-user Library +M: Thanos Makatos +M: John Levon +T: https://github.com/nutanix/libvfio-user.git +S: Maintained +F: libvfio-user/* + Multi-process QEMU M: Elena Ufimtseva M: Jagannathan Raman diff --git a/hw/remote/meson.build b/hw/remote/meson.build index e6a5574..fb35fb8 100644 --- a/hw/remote/meson.build +++ b/hw/remote/meson.build @@ -7,6 +7,8 @@ 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')) =20 +remote_ss.add(when: 'CONFIG_MULTIPROCESS', if_true: vfiouser) + specific_ss.add(when: 'CONFIG_MULTIPROCESS', if_true: files('memory.c')) specific_ss.add(when: 'CONFIG_MULTIPROCESS', if_true: files('proxy-memory-= listener.c')) =20 diff --git a/libvfio-user b/libvfio-user new file mode 160000 index 0000000..2a0a929 --- /dev/null +++ b/libvfio-user @@ -0,0 +1 @@ +Subproject commit 2a0a92912d598de871ab47c034432c5fa6546dc4 --=20 1.8.3.1 From nobody Sat May 18 06:04:12 2024 Delivered-To: importer@patchew.org Authentication-Results: mx.zohomail.com; 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envelope-from=qemu-devel-bounces+importer=patchew.org@nongnu.org; helo=lists.gnu.org; Received-SPF: pass client-ip=205.220.165.32; 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, 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, jag.raman@oracle.com, swapnil.ingle@nutanix.com, john.levon@nutanix.com, alex.williamson@redhat.com, stefanha@redhat.com, thanos.makatos@nutanix.com Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: "Qemu-devel" X-ZohoMail-DKIM: pass (identity @oracle.onmicrosoft.com) X-ZM-MESSAGEID: 1626724987214100001 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 | 141 ++++++++++++++++++++++++++++++++++++++++++= ++++ MAINTAINERS | 1 + hw/remote/meson.build | 1 + hw/remote/trace-events | 3 + 5 files changed, 164 insertions(+), 2 deletions(-) create mode 100644 hw/remote/vfio-user-obj.c diff --git a/qapi/qom.json b/qapi/qom.json index 652be31..e0716d2 100644 --- a/qapi/qom.json +++ b/qapi/qom.json @@ -684,6 +684,20 @@ 'data': { 'fd': 'str', 'devid': 'str' } } =20 ## +# @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. @@ -807,7 +821,8 @@ 'tls-creds-psk', 'tls-creds-x509', 'tls-cipher-suites', - 'x-remote-object' + 'x-remote-object', + 'vfio-user' ] } =20 ## @@ -863,7 +878,8 @@ 'tls-creds-psk': 'TlsCredsPskProperties', 'tls-creds-x509': 'TlsCredsX509Properties', 'tls-cipher-suites': 'TlsCredsProperties', - 'x-remote-object': 'RemoteObjectProperties' + 'x-remote-object': 'RemoteObjectProperties', + 'vfio-user': 'VfioUserProperties' } } =20 ## diff --git a/hw/remote/vfio-user-obj.c b/hw/remote/vfio-user-obj.c new file mode 100644 index 0000000..5098169 --- /dev/null +++ b/hw/remote/vfio-user-obj.c @@ -0,0 +1,141 @@ +/* + * QEMU vfio-user server object + * + * Copyright =C2=A9 2021 Oracle and/or its affiliates. + * + * This work is licensed under the terms of the GNU GPL-v2, version 2 or l= ater. + * + * See the COPYING file in the top-level directory. + * + */ + +/** + * Usage: add options: + * -machine x-remote + * -device ,id=3D + * -object vfio-user,id=3D,socket=3D,devid=3D + * + * 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 op= tion. + */ + +#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 **er= rp) +{ + VfuObject *o =3D VFU_OBJECT(obj); + + g_free(o->socket); + + o->socket =3D g_strdup(str); + + trace_vfu_prop("socket", str); +} + +static void vfu_object_set_devid(Object *obj, const char *str, Error **err= p) +{ + VfuObject *o =3D VFU_OBJECT(obj); + + g_free(o->devid); + + o->devid =3D g_strdup(str); + + trace_vfu_prop("devid", str); +} + +static void vfu_object_init(Object *obj) +{ + VfuObjectClass *k =3D VFU_OBJECT_GET_CLASS(obj); + + /* Add test for remote machine and PCI device */ + + if (k->nr_devs >=3D 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 =3D VFU_OBJECT_GET_CLASS(obj); + VfuObject *o =3D VFU_OBJECT(obj); + + k->nr_devs--; + + g_free(o->socket); + g_free(o->devid); + + if (k->nr_devs =3D=3D 0) { + qemu_system_shutdown_request(SHUTDOWN_CAUSE_GUEST_SHUTDOWN); + } +} + +static void vfu_object_class_init(ObjectClass *klass, void *data) +{ + VfuObjectClass *k =3D VFU_OBJECT_CLASS(klass); + + /* Limiting maximum number of devices to 1 until IOMMU support is adde= d */ + k->max_devs =3D 1; + k->nr_devs =3D 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 =3D { + .name =3D TYPE_VFU_OBJECT, + .parent =3D TYPE_OBJECT, + .instance_size =3D sizeof(VfuObject), + .instance_init =3D vfu_object_init, + .instance_finalize =3D vfu_object_finalize, + .class_size =3D sizeof(VfuObjectClass), + .class_init =3D vfu_object_class_init, + .interfaces =3D (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 99646e7..46ab6b6 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -3380,6 +3380,7 @@ 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 =20 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= ')) =20 remote_ss.add(when: 'CONFIG_MULTIPROCESS', if_true: vfiouser) =20 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 @@ =20 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 si= ze %d, %d file descriptors to remote process" + +# vfio-user-obj.c +vfu_prop(const char *prop, const char *val) "vfu: setting %s as %s" --=20 1.8.3.1 From nobody Sat May 18 06:04:12 2024 Delivered-To: importer@patchew.org Authentication-Results: mx.zohomail.com; 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charset="utf-8" create a context with the vfio-user library for a device Signed-off-by: Elena Ufimtseva Signed-off-by: John G Johnson Signed-off-by: Jagannathan Raman --- hw/remote/vfio-user-obj.c | 30 ++++++++++++++++++++++++++++++ 1 file changed, 30 insertions(+) diff --git a/hw/remote/vfio-user-obj.c b/hw/remote/vfio-user-obj.c index 5098169..adb3193 100644 --- a/hw/remote/vfio-user-obj.c +++ b/hw/remote/vfio-user-obj.c @@ -27,11 +27,18 @@ #include "qemu/osdep.h" #include "qemu-common.h" =20 +#include + #include "qom/object.h" #include "qom/object_interfaces.h" #include "qemu/error-report.h" #include "trace.h" #include "sysemu/runstate.h" +#include "qemu/notify.h" +#include "qapi/error.h" +#include "sysemu/sysemu.h" + +#include "libvfio-user/include/libvfio-user.h" =20 #define TYPE_VFU_OBJECT "vfio-user" OBJECT_DECLARE_TYPE(VfuObject, VfuObjectClass, VFU_OBJECT) @@ -51,6 +58,10 @@ struct VfuObject { =20 char *socket; char *devid; + + Notifier machine_done; + + vfu_ctx_t *vfu_ctx; }; =20 static void vfu_object_set_socket(Object *obj, const char *str, Error **er= rp) @@ -75,9 +86,23 @@ static void vfu_object_set_devid(Object *obj, const char= *str, Error **errp) trace_vfu_prop("devid", str); } =20 +static void vfu_object_machine_done(Notifier *notifier, void *data) +{ + VfuObject *o =3D container_of(notifier, VfuObject, machine_done); + + o->vfu_ctx =3D vfu_create_ctx(VFU_TRANS_SOCK, o->socket, 0, + o, VFU_DEV_TYPE_PCI); + if (o->vfu_ctx =3D=3D NULL) { + error_setg(&error_abort, "vfu: Failed to create context - %s", + strerror(errno)); + return; + } +} + static void vfu_object_init(Object *obj) { VfuObjectClass *k =3D VFU_OBJECT_GET_CLASS(obj); + VfuObject *o =3D VFU_OBJECT(obj); =20 /* Add test for remote machine and PCI device */ =20 @@ -88,6 +113,9 @@ static void vfu_object_init(Object *obj) } =20 k->nr_devs++; + + o->machine_done.notify =3D vfu_object_machine_done; + qemu_add_machine_init_done_notifier(&o->machine_done); } =20 static void vfu_object_finalize(Object *obj) @@ -97,6 +125,8 @@ static void vfu_object_finalize(Object *obj) =20 k->nr_devs--; 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charset="utf-8" Find the PCI device with specified id. Initialize the device context with the QEMU PCI device Signed-off-by: Elena Ufimtseva Signed-off-by: John G Johnson Signed-off-by: Jagannathan Raman --- hw/remote/vfio-user-obj.c | 28 ++++++++++++++++++++++++++++ 1 file changed, 28 insertions(+) diff --git a/hw/remote/vfio-user-obj.c b/hw/remote/vfio-user-obj.c index adb3193..e362709 100644 --- a/hw/remote/vfio-user-obj.c +++ b/hw/remote/vfio-user-obj.c @@ -37,6 +37,8 @@ #include "qemu/notify.h" #include "qapi/error.h" #include "sysemu/sysemu.h" +#include "hw/qdev-core.h" +#include "hw/pci/pci.h" =20 #include "libvfio-user/include/libvfio-user.h" =20 @@ -62,6 +64,8 @@ struct VfuObject { Notifier machine_done; =20 vfu_ctx_t *vfu_ctx; + + PCIDevice *pci_dev; }; =20 static void vfu_object_set_socket(Object *obj, const char *str, Error **er= rp) @@ -89,6 +93,8 @@ static void vfu_object_set_devid(Object *obj, const char = *str, Error **errp) static void vfu_object_machine_done(Notifier *notifier, void *data) { VfuObject *o =3D container_of(notifier, VfuObject, machine_done); + DeviceState *dev =3D NULL; + int ret; =20 o->vfu_ctx =3D vfu_create_ctx(VFU_TRANS_SOCK, o->socket, 0, o, VFU_DEV_TYPE_PCI); @@ -97,6 +103,28 @@ static void vfu_object_machine_done(Notifier *notifier,= void *data) strerror(errno)); return; } + + dev =3D qdev_find_recursive(sysbus_get_default(), o->devid); + if (dev =3D=3D NULL) { + error_setg(&error_abort, "vfu: Device %s not found", o->devid); + return; + } + o->pci_dev =3D PCI_DEVICE(dev); + + ret =3D vfu_pci_init(o->vfu_ctx, VFU_PCI_TYPE_CONVENTIONAL, + PCI_HEADER_TYPE_NORMAL, 0); + if (ret < 0) { + error_setg(&error_abort, + "vfu: Failed to attach PCI device %s to context - %s", + o->devid, strerror(errno)); + return; + } + + vfu_pci_set_id(o->vfu_ctx, + pci_get_word(o->pci_dev->config + PCI_VENDOR_ID), + pci_get_word(o->pci_dev->config + PCI_DEVICE_ID), + pci_get_word(o->pci_dev->config + PCI_SUBSYSTEM_VENDOR_= ID), + pci_get_word(o->pci_dev->config + PCI_SUBSYSTEM_ID)); } =20 static void vfu_object_init(Object *obj) --=20 1.8.3.1 From nobody Sat May 18 06:04:12 2024 Delivered-To: importer@patchew.org Authentication-Results: mx.zohomail.com; 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charset="utf-8" Setup a separate thread to run the vfio-user context. The thread acts as the main loop for the device. Signed-off-by: Elena Ufimtseva Signed-off-by: John G Johnson Signed-off-by: Jagannathan Raman --- hw/remote/vfio-user-obj.c | 44 ++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 44 insertions(+) diff --git a/hw/remote/vfio-user-obj.c b/hw/remote/vfio-user-obj.c index e362709..6a2d0f5 100644 --- a/hw/remote/vfio-user-obj.c +++ b/hw/remote/vfio-user-obj.c @@ -35,6 +35,7 @@ #include "trace.h" #include "sysemu/runstate.h" #include "qemu/notify.h" +#include "qemu/thread.h" #include "qapi/error.h" #include "sysemu/sysemu.h" #include "hw/qdev-core.h" @@ -66,6 +67,8 @@ struct VfuObject { vfu_ctx_t *vfu_ctx; =20 PCIDevice *pci_dev; + + QemuThread vfu_ctx_thread; }; =20 static void vfu_object_set_socket(Object *obj, const char *str, Error **er= rp) @@ -90,6 +93,44 @@ static void vfu_object_set_devid(Object *obj, const char= *str, Error **errp) trace_vfu_prop("devid", str); } =20 +static void *vfu_object_ctx_run(void *opaque) +{ + VfuObject *o =3D opaque; + int ret; + + ret =3D vfu_realize_ctx(o->vfu_ctx); + if (ret < 0) { + error_setg(&error_abort, "vfu: Failed to realize device %s- %s", + o->devid, strerror(errno)); + return NULL; + } + + ret =3D vfu_attach_ctx(o->vfu_ctx); + if (ret < 0) { + error_setg(&error_abort, + "vfu: Failed to attach device %s to context - %s", + o->devid, strerror(errno)); + return NULL; + } + + do { + ret =3D vfu_run_ctx(o->vfu_ctx); + if (ret < 0) { + if (errno =3D=3D EINTR) { + ret =3D 0; + } else if (errno =3D=3D ENOTCONN) { + object_unparent(OBJECT(o)); + break; + } else { + error_setg(&error_abort, "vfu: Failed to run device %s - %= s", + o->devid, strerror(errno)); + } + } + } while (ret =3D=3D 0); + + return NULL; +} + static void vfu_object_machine_done(Notifier *notifier, void *data) { VfuObject *o =3D container_of(notifier, VfuObject, machine_done); @@ -125,6 +166,9 @@ static void vfu_object_machine_done(Notifier *notifier,= void *data) pci_get_word(o->pci_dev->config + PCI_DEVICE_ID), pci_get_word(o->pci_dev->config + PCI_SUBSYSTEM_VENDOR_= ID), pci_get_word(o->pci_dev->config + PCI_SUBSYSTEM_ID)); + + qemu_thread_create(&o->vfu_ctx_thread, "VFU ctx runner", vfu_object_ct= x_run, + o, QEMU_THREAD_JOINABLE); } =20 static void vfu_object_init(Object *obj) --=20 1.8.3.1 From nobody Sat May 18 06:04:12 2024 Delivered-To: importer@patchew.org Authentication-Results: mx.zohomail.com; dkim=pass; spf=pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) smtp.mailfrom=qemu-devel-bounces+importer=patchew.org@nongnu.org; arc=pass (i=1 dmarc=pass fromdomain=oracle.com); dmarc=fail(p=none dis=none) header.from=oracle.com ARC-Seal: i=2; a=rsa-sha256; t=1626725053; cv=pass; d=zohomail.com; s=zohoarc; b=DUk9PfR4BTII8ELk+awuEYd6rrkm/qRNs3LiFSx0AEhcys2h0c372UW+KcnAApokEl0reyBE84i7hgTC40aVaVQNPDwDUOTGcv8IdzWmgvtvshTHRkHRWDHYPfr3T7TihcGCoCAL/RMHMGvTDZw1VrETgsrUpR6rr0ii1evhD3w= ARC-Message-Signature: i=2; a=rsa-sha256; c=relaxed/relaxed; d=zohomail.com; s=zohoarc; t=1626725053; h=Content-Type:Cc:Date:From:In-Reply-To:List-Subscribe:List-Post:List-Id:List-Archive:List-Help:List-Unsubscribe:MIME-Version:Message-ID:References:Sender:Subject:To; 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charset="utf-8" Define and register handlers for PCI config space accesses Signed-off-by: Elena Ufimtseva Signed-off-by: John G Johnson Signed-off-by: Jagannathan Raman --- hw/remote/vfio-user-obj.c | 41 +++++++++++++++++++++++++++++++++++++++++ hw/remote/trace-events | 2 ++ 2 files changed, 43 insertions(+) diff --git a/hw/remote/vfio-user-obj.c b/hw/remote/vfio-user-obj.c index 6a2d0f5..60d9fa8 100644 --- a/hw/remote/vfio-user-obj.c +++ b/hw/remote/vfio-user-obj.c @@ -36,6 +36,7 @@ #include "sysemu/runstate.h" #include "qemu/notify.h" #include "qemu/thread.h" +#include "qemu/main-loop.h" #include "qapi/error.h" #include "sysemu/sysemu.h" #include "hw/qdev-core.h" @@ -131,6 +132,35 @@ static void *vfu_object_ctx_run(void *opaque) return NULL; } =20 +static ssize_t vfu_object_cfg_access(vfu_ctx_t *vfu_ctx, char * const buf, + size_t count, loff_t offset, + const bool is_write) +{ + VfuObject *o =3D vfu_get_private(vfu_ctx); + uint32_t val =3D 0; + int i; + + qemu_mutex_lock_iothread(); + + for (i =3D 0; i < count; i++) { + if (is_write) { + val =3D *((uint8_t *)(buf + i)); + trace_vfu_cfg_write((offset + i), val); + pci_default_write_config(PCI_DEVICE(o->pci_dev), + (offset + i), val, 1); + } else { + val =3D pci_default_read_config(PCI_DEVICE(o->pci_dev), + (offset + i), 1); + *((uint8_t *)(buf + i)) =3D (uint8_t)val; + trace_vfu_cfg_read((offset + i), val); + } + } + + qemu_mutex_unlock_iothread(); + + return count; +} + static void vfu_object_machine_done(Notifier *notifier, void *data) { VfuObject *o =3D container_of(notifier, VfuObject, machine_done); @@ -167,6 +197,17 @@ static void vfu_object_machine_done(Notifier *notifier= , void *data) pci_get_word(o->pci_dev->config + PCI_SUBSYSTEM_VENDOR_= ID), pci_get_word(o->pci_dev->config + PCI_SUBSYSTEM_ID)); =20 + ret =3D vfu_setup_region(o->vfu_ctx, VFU_PCI_DEV_CFG_REGION_IDX, + pci_config_size(o->pci_dev), &vfu_object_cfg_ac= cess, + VFU_REGION_FLAG_RW | VFU_REGION_FLAG_ALWAYS_CB, + NULL, 0, -1, 0); + if (ret < 0) { + error_setg(&error_abort, + "vfu: Failed to setup config space handlers for %s- %s", + o->devid, strerror(errno)); + return; + } + qemu_thread_create(&o->vfu_ctx_thread, "VFU ctx runner", vfu_object_ct= x_run, o, QEMU_THREAD_JOINABLE); } diff --git a/hw/remote/trace-events b/hw/remote/trace-events index 7da12f0..2ef7884 100644 --- a/hw/remote/trace-events +++ b/hw/remote/trace-events @@ -5,3 +5,5 @@ mpqemu_recv_io_error(int cmd, int size, int nfds) "failed t= o receive %d size %d, =20 # vfio-user-obj.c vfu_prop(const char *prop, const char *val) "vfu: setting %s as %s" +vfu_cfg_read(uint32_t offset, uint32_t val) "vfu: cfg: 0x%u -> 0x%x" +vfu_cfg_write(uint32_t offset, uint32_t val) "vfu: cfg: 0x%u <- 0x%x" --=20 1.8.3.1 From nobody Sat May 18 06:04:12 2024 Delivered-To: importer@patchew.org Authentication-Results: mx.zohomail.com; dkim=pass; spf=pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) smtp.mailfrom=qemu-devel-bounces+importer=patchew.org@nongnu.org; arc=pass (i=1 dmarc=pass fromdomain=oracle.com); dmarc=fail(p=none dis=none) header.from=oracle.com ARC-Seal: i=2; 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charset="utf-8" Define and register callbacks to manage the RAM regions used for device DMA Signed-off-by: Elena Ufimtseva Signed-off-by: John G Johnson Signed-off-by: Jagannathan Raman --- hw/remote/vfio-user-obj.c | 58 +++++++++++++++++++++++++++++++++++++++++++= ++++ hw/remote/trace-events | 2 ++ 2 files changed, 60 insertions(+) diff --git a/hw/remote/vfio-user-obj.c b/hw/remote/vfio-user-obj.c index 60d9fa8..d158a7f 100644 --- a/hw/remote/vfio-user-obj.c +++ b/hw/remote/vfio-user-obj.c @@ -161,6 +161,57 @@ static ssize_t vfu_object_cfg_access(vfu_ctx_t *vfu_ct= x, char * const buf, return count; } =20 +static void dma_register(vfu_ctx_t *vfu_ctx, vfu_dma_info_t *info) +{ + MemoryRegion *subregion =3D NULL; + g_autofree char *name =3D NULL; + static unsigned int suffix; + struct iovec *iov =3D &info->iova; + + if (!info->vaddr) { + return; + } + + name =3D g_strdup_printf("remote-mem-%u", suffix++); + + subregion =3D g_new0(MemoryRegion, 1); + + qemu_mutex_lock_iothread(); + + memory_region_init_ram_ptr(subregion, NULL, name, + iov->iov_len, info->vaddr); + + memory_region_add_subregion(get_system_memory(), (hwaddr)iov->iov_base, + subregion); + + qemu_mutex_unlock_iothread(); + + trace_vfu_dma_register((uint64_t)iov->iov_base, iov->iov_len); +} + +static int dma_unregister(vfu_ctx_t *vfu_ctx, vfu_dma_info_t *info) +{ + MemoryRegion *mr =3D NULL; + ram_addr_t offset; + + mr =3D memory_region_from_host(info->vaddr, &offset); + if (!mr) { + return 0; + } + + qemu_mutex_lock_iothread(); + + memory_region_del_subregion(get_system_memory(), mr); + + object_unparent((OBJECT(mr))); + + qemu_mutex_unlock_iothread(); + + trace_vfu_dma_unregister((uint64_t)info->iova.iov_base); + + return 0; +} + static void vfu_object_machine_done(Notifier *notifier, void *data) { VfuObject *o =3D container_of(notifier, VfuObject, machine_done); @@ -208,6 +259,13 @@ static void vfu_object_machine_done(Notifier *notifier= , void *data) return; } =20 + ret =3D vfu_setup_device_dma(o->vfu_ctx, &dma_register, &dma_unregiste= r); + if (ret < 0) { + error_setg(&error_abort, "vfu: Failed to setup DMA handlers for %s= ", + o->devid); + return; + } + qemu_thread_create(&o->vfu_ctx_thread, "VFU ctx runner", vfu_object_ct= x_run, o, QEMU_THREAD_JOINABLE); } diff --git a/hw/remote/trace-events b/hw/remote/trace-events index 2ef7884..f945c7e 100644 --- a/hw/remote/trace-events +++ b/hw/remote/trace-events @@ -7,3 +7,5 @@ mpqemu_recv_io_error(int cmd, int size, int nfds) "failed t= o receive %d size %d, vfu_prop(const char *prop, const char *val) "vfu: setting %s as %s" vfu_cfg_read(uint32_t offset, uint32_t val) "vfu: cfg: 0x%u -> 0x%x" vfu_cfg_write(uint32_t offset, uint32_t val) "vfu: cfg: 0x%u <- 0x%x" +vfu_dma_register(uint64_t gpa, size_t len) "vfu: registering GPA 0x%"PRIx6= 4", %zu bytes" +vfu_dma_unregister(uint64_t gpa) "vfu: unregistering GPA 0x%"PRIx64"" --=20 1.8.3.1 From nobody Sat May 18 06:04:12 2024 Delivered-To: importer@patchew.org Authentication-Results: mx.zohomail.com; dkim=pass; spf=pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) smtp.mailfrom=qemu-devel-bounces+importer=patchew.org@nongnu.org; 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charset="utf-8" Determine the BARs used by the PCI device and register handlers to manage the access to the same. Signed-off-by: Elena Ufimtseva Signed-off-by: John G Johnson Signed-off-by: Jagannathan Raman --- hw/remote/vfio-user-obj.c | 95 +++++++++++++++++++++++++++++++++++++++++++= ++++ hw/remote/trace-events | 2 + 2 files changed, 97 insertions(+) diff --git a/hw/remote/vfio-user-obj.c b/hw/remote/vfio-user-obj.c index d158a7f..9853feb 100644 --- a/hw/remote/vfio-user-obj.c +++ b/hw/remote/vfio-user-obj.c @@ -212,6 +212,99 @@ static int dma_unregister(vfu_ctx_t *vfu_ctx, vfu_dma_= info_t *info) return 0; } =20 +static ssize_t vfu_object_bar_rw(PCIDevice *pci_dev, hwaddr addr, size_t c= ount, + char * const buf, const bool is_write, + uint8_t type) +{ + AddressSpace *as =3D NULL; + MemTxResult res; + + if (type =3D=3D PCI_BASE_ADDRESS_SPACE_MEMORY) { + as =3D pci_device_iommu_address_space(pci_dev); + } else { + as =3D &address_space_io; + } + + trace_vfu_bar_rw_enter(is_write ? "Write" : "Read", (uint64_t)addr); + + res =3D address_space_rw(as, addr, MEMTXATTRS_UNSPECIFIED, (void *)buf, + (hwaddr)count, is_write); + if (res !=3D MEMTX_OK) { + warn_report("vfu: failed to %s 0x%"PRIx64"", + is_write ? "write to" : "read from", + addr); + return -1; + } + + trace_vfu_bar_rw_exit(is_write ? "Write" : "Read", (uint64_t)addr); + + return count; +} + +/** + * VFU_OBJECT_BAR_HANDLER - macro for defining handlers for PCI BARs. + * + * To create handler for BAR number 2, VFU_OBJECT_BAR_HANDLER(2) would + * define vfu_object_bar2_handler + */ +#define VFU_OBJECT_BAR_HANDLER(BAR_NO) = \ + static ssize_t vfu_object_bar##BAR_NO##_handler(vfu_ctx_t *vfu_ctx, = \ + char * const buf, size_t count, = \ + loff_t offset, const bool is_write= ) \ + { = \ + VfuObject *o =3D vfu_get_private(vfu_ctx); = \ + hwaddr addr =3D (hwaddr)(pci_get_long(o->pci_dev->config + = \ + PCI_BASE_ADDRESS_0 + = \ + (4 * BAR_NO)) + offset); = \ + = \ + return vfu_object_bar_rw(o->pci_dev, addr, count, buf, is_write, = \ + o->pci_dev->io_regions[BAR_NO].type); = \ + } = \ + +VFU_OBJECT_BAR_HANDLER(0) +VFU_OBJECT_BAR_HANDLER(1) +VFU_OBJECT_BAR_HANDLER(2) +VFU_OBJECT_BAR_HANDLER(3) +VFU_OBJECT_BAR_HANDLER(4) +VFU_OBJECT_BAR_HANDLER(5) + +static vfu_region_access_cb_t *vfu_object_bar_handlers[PCI_NUM_REGIONS] = =3D { + &vfu_object_bar0_handler, + &vfu_object_bar1_handler, + &vfu_object_bar2_handler, + &vfu_object_bar3_handler, + &vfu_object_bar4_handler, + &vfu_object_bar5_handler, +}; + +/** + * vfu_object_register_bars - Identify active BAR regions of pdev and setup + * callbacks to handle read/write accesses + */ +static void vfu_object_register_bars(vfu_ctx_t *vfu_ctx, PCIDevice *pdev) +{ + uint32_t orig_val, new_val; + int i, size; + + for (i =3D 0; i < PCI_NUM_REGIONS; i++) { + orig_val =3D pci_default_read_config(pdev, + PCI_BASE_ADDRESS_0 + (4 * i), 4= ); + new_val =3D 0xffffffff; + pci_default_write_config(pdev, + PCI_BASE_ADDRESS_0 + (4 * i), new_val, 4); + new_val =3D pci_default_read_config(pdev, + PCI_BASE_ADDRESS_0 + (4 * i), 4); + size =3D (~(new_val & 0xFFFFFFF0)) + 1; + pci_default_write_config(pdev, PCI_BASE_ADDRESS_0 + (4 * i), + orig_val, 4); + if (size) { + vfu_setup_region(vfu_ctx, VFU_PCI_DEV_BAR0_REGION_IDX + i, siz= e, + vfu_object_bar_handlers[i], VFU_REGION_FLAG_R= W, + NULL, 0, -1, 0); + } + } +} + static void vfu_object_machine_done(Notifier *notifier, void *data) { VfuObject *o =3D container_of(notifier, VfuObject, machine_done); @@ -266,6 +359,8 @@ static void vfu_object_machine_done(Notifier *notifier,= void *data) return; } =20 + vfu_object_register_bars(o->vfu_ctx, o->pci_dev); + qemu_thread_create(&o->vfu_ctx_thread, "VFU ctx runner", vfu_object_ct= x_run, o, QEMU_THREAD_JOINABLE); } diff --git a/hw/remote/trace-events b/hw/remote/trace-events index f945c7e..f3f65e2 100644 --- a/hw/remote/trace-events +++ b/hw/remote/trace-events @@ -9,3 +9,5 @@ vfu_cfg_read(uint32_t offset, uint32_t val) "vfu: cfg: 0x%u= -> 0x%x" vfu_cfg_write(uint32_t offset, uint32_t val) "vfu: cfg: 0x%u <- 0x%x" vfu_dma_register(uint64_t gpa, size_t len) "vfu: registering GPA 0x%"PRIx6= 4", %zu bytes" vfu_dma_unregister(uint64_t gpa) "vfu: unregistering GPA 0x%"PRIx64"" +vfu_bar_rw_enter(const char *op, uint64_t addr) "vfu: %s request for BAR a= ddress 0x%"PRIx64"" +vfu_bar_rw_exit(const char *op, uint64_t addr) "vfu: Finished %s of BAR ad= dress 0x%"PRIx64"" --=20 1.8.3.1 From nobody Sat May 18 06:04:12 2024 Delivered-To: importer@patchew.org Authentication-Results: mx.zohomail.com; dkim=pass; spf=pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) smtp.mailfrom=qemu-devel-bounces+importer=patchew.org@nongnu.org; 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charset="utf-8" Forward remote device's interrupts to the guest Signed-off-by: Elena Ufimtseva Signed-off-by: John G Johnson Signed-off-by: Jagannathan Raman --- include/hw/remote/iohub.h | 2 ++ hw/remote/iohub.c | 6 ++++++ hw/remote/vfio-user-obj.c | 30 ++++++++++++++++++++++++++++++ hw/remote/trace-events | 1 + 4 files changed, 39 insertions(+) diff --git a/include/hw/remote/iohub.h b/include/hw/remote/iohub.h index 0bf98e0..132f496 100644 --- a/include/hw/remote/iohub.h +++ b/include/hw/remote/iohub.h @@ -15,6 +15,7 @@ #include "qemu/event_notifier.h" #include "qemu/thread-posix.h" #include "hw/remote/mpqemu-link.h" +#include "libvfio-user/include/libvfio-user.h" =20 #define REMOTE_IOHUB_NB_PIRQS PCI_DEVFN_MAX =20 @@ -30,6 +31,7 @@ typedef struct RemoteIOHubState { unsigned int irq_level[REMOTE_IOHUB_NB_PIRQS]; ResampleToken token[REMOTE_IOHUB_NB_PIRQS]; QemuMutex irq_level_lock[REMOTE_IOHUB_NB_PIRQS]; + vfu_ctx_t *vfu_ctx[REMOTE_IOHUB_NB_PIRQS]; } RemoteIOHubState; =20 int remote_iohub_map_irq(PCIDevice *pci_dev, int intx); diff --git a/hw/remote/iohub.c b/hw/remote/iohub.c index 547d597..241c8d7 100644 --- a/hw/remote/iohub.c +++ b/hw/remote/iohub.c @@ -18,6 +18,8 @@ #include "hw/remote/machine.h" #include "hw/remote/iohub.h" #include "qemu/main-loop.h" +#include "libvfio-user/include/libvfio-user.h" +#include "trace.h" =20 void remote_iohub_init(RemoteIOHubState *iohub) { @@ -62,6 +64,10 @@ void remote_iohub_set_irq(void *opaque, int pirq, int le= vel) QEMU_LOCK_GUARD(&iohub->irq_level_lock[pirq]); =20 if (level) { + if (iohub->vfu_ctx[pirq]) { + trace_vfu_interrupt(pirq); + vfu_irq_trigger(iohub->vfu_ctx[pirq], 0); + } if (++iohub->irq_level[pirq] =3D=3D 1) { event_notifier_set(&iohub->irqfds[pirq]); } diff --git a/hw/remote/vfio-user-obj.c b/hw/remote/vfio-user-obj.c index 9853feb..d2a2e51 100644 --- a/hw/remote/vfio-user-obj.c +++ b/hw/remote/vfio-user-obj.c @@ -41,6 +41,9 @@ #include "sysemu/sysemu.h" #include "hw/qdev-core.h" #include "hw/pci/pci.h" +#include "hw/boards.h" +#include "hw/remote/iohub.h" +#include "hw/remote/machine.h" =20 #include "libvfio-user/include/libvfio-user.h" =20 @@ -305,6 +308,26 @@ static void vfu_object_register_bars(vfu_ctx_t *vfu_ct= x, PCIDevice *pdev) } } =20 +static int vfu_object_setup_irqs(vfu_ctx_t *vfu_ctx, PCIDevice *pci_dev) +{ + RemoteMachineState *machine =3D REMOTE_MACHINE(current_machine); + RemoteIOHubState *iohub =3D &machine->iohub; + int pirq, intx, ret; + + ret =3D vfu_setup_device_nr_irqs(vfu_ctx, VFU_DEV_INTX_IRQ, 1); + if (ret < 0) { + return ret; + } + + intx =3D pci_get_byte(pci_dev->config + PCI_INTERRUPT_PIN) - 1; + + pirq =3D remote_iohub_map_irq(pci_dev, intx); + + iohub->vfu_ctx[pirq] =3D vfu_ctx; + + return 0; +} + static void vfu_object_machine_done(Notifier *notifier, void *data) { VfuObject *o =3D container_of(notifier, VfuObject, machine_done); @@ -361,6 +384,13 @@ static void vfu_object_machine_done(Notifier *notifier= , void *data) =20 vfu_object_register_bars(o->vfu_ctx, o->pci_dev); =20 + ret =3D vfu_object_setup_irqs(o->vfu_ctx, o->pci_dev); + if (ret < 0) { + error_setg(&error_abort, "vfu: Failed to setup interrupts for %s", + o->devid); + return; + } + qemu_thread_create(&o->vfu_ctx_thread, "VFU ctx runner", vfu_object_ct= x_run, o, QEMU_THREAD_JOINABLE); } diff --git a/hw/remote/trace-events b/hw/remote/trace-events index f3f65e2..b419d6f 100644 --- a/hw/remote/trace-events +++ b/hw/remote/trace-events @@ -11,3 +11,4 @@ vfu_dma_register(uint64_t gpa, size_t len) "vfu: register= ing GPA 0x%"PRIx64", %z vfu_dma_unregister(uint64_t gpa) "vfu: unregistering GPA 0x%"PRIx64"" vfu_bar_rw_enter(const char *op, uint64_t addr) "vfu: %s request for BAR a= ddress 0x%"PRIx64"" vfu_bar_rw_exit(const char *op, uint64_t addr) "vfu: Finished %s of BAR ad= dress 0x%"PRIx64"" +vfu_interrupt(int pirq) "vfu: sending interrupt to device - PIRQ %d" --=20 1.8.3.1 From nobody Sat May 18 06:04:12 2024 Delivered-To: importer@patchew.org Authentication-Results: mx.zohomail.com; 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envelope-from=qemu-devel-bounces+importer=patchew.org@nongnu.org; helo=lists.gnu.org; Received-SPF: pass client-ip=205.220.165.32; 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, 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, jag.raman@oracle.com, swapnil.ingle@nutanix.com, john.levon@nutanix.com, alex.williamson@redhat.com, stefanha@redhat.com, thanos.makatos@nutanix.com Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: "Qemu-devel" X-ZohoMail-DKIM: pass (identity @oracle.onmicrosoft.com) X-ZM-MESSAGEID: 1626725009674100003 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" Store and load the device's state using handlers for live migration Signed-off-by: Elena Ufimtseva Signed-off-by: John G Johnson Signed-off-by: Jagannathan Raman --- migration/savevm.h | 2 + hw/remote/vfio-user-obj.c | 287 ++++++++++++++++++++++++++++++++++++++++++= ++++ migration/savevm.c | 63 ++++++++++ 3 files changed, 352 insertions(+) diff --git a/migration/savevm.h b/migration/savevm.h index 6461342..71d1733 100644 --- a/migration/savevm.h +++ b/migration/savevm.h @@ -67,5 +67,7 @@ int qemu_loadvm_state_main(QEMUFile *f, MigrationIncoming= State *mis); int qemu_load_device_state(QEMUFile *f); int qemu_savevm_state_complete_precopy_non_iterable(QEMUFile *f, bool in_postcopy, bool inactivate_disks); +int qemu_remote_savevm(QEMUFile *f); +int qemu_remote_loadvm(QEMUFile *f); =20 #endif diff --git a/hw/remote/vfio-user-obj.c b/hw/remote/vfio-user-obj.c index d2a2e51..5948576 100644 --- a/hw/remote/vfio-user-obj.c +++ b/hw/remote/vfio-user-obj.c @@ -44,6 +44,10 @@ #include "hw/boards.h" #include "hw/remote/iohub.h" #include "hw/remote/machine.h" +#include "migration/qemu-file.h" +#include "migration/savevm.h" +#include "migration/global_state.h" +#include "block/block.h" =20 #include "libvfio-user/include/libvfio-user.h" =20 @@ -73,6 +77,31 @@ struct VfuObject { PCIDevice *pci_dev; =20 QemuThread vfu_ctx_thread; + + /* + * vfu_mig_buf holds the migration data. In the remote process, this + * buffer replaces the role of an IO channel which links the source + * and the destination. + * + * Whenever the client QEMU process initiates migration, the libvfio-u= ser + * library notifies that to this server. The remote/server QEMU sets u= p a + * QEMUFile object using this buffer as backend. The remote passes this + * object to its migration subsystem, and it slirps the VMSDs of all i= ts + * devices and stores them in this buffer. + * + * libvfio-user library subsequetly asks the remote for any data that = needs + * to be moved over to the destination using its vfu_migration_callbac= ks_t + * APIs. The remote hands over this buffer as data at this time. + * + * A reverse of this process happens at the destination. + */ + uint8_t *vfu_mig_buf; + + uint64_t vfu_mig_buf_size; + + uint64_t vfu_mig_buf_pending; + + QEMUFile *vfu_mig_file; }; =20 static void vfu_object_set_socket(Object *obj, const char *str, Error **er= rp) @@ -97,6 +126,226 @@ static void vfu_object_set_devid(Object *obj, const ch= ar *str, Error **errp) trace_vfu_prop("devid", str); } =20 +/** + * Migration helper functions + * + * vfu_mig_buf_read & vfu_mig_buf_write are used by QEMU's migration + * subsystem - qemu_remote_savevm & qemu_remote_loadvm. savevm/loadvm + * call these functions via QEMUFileOps to save/load the VMSD of all + * the devices into vfu_mig_buf + * + */ +static ssize_t vfu_mig_buf_read(void *opaque, uint8_t *buf, int64_t pos, + size_t size, Error **errp) +{ + VfuObject *o =3D opaque; + + if (pos > o->vfu_mig_buf_size) { + size =3D 0; + } else if ((pos + size) > o->vfu_mig_buf_size) { + size =3D o->vfu_mig_buf_size; + } + + memcpy(buf, (o->vfu_mig_buf + pos), size); + + o->vfu_mig_buf_size -=3D size; + + return size; +} + +static ssize_t vfu_mig_buf_write(void *opaque, struct iovec *iov, int iovc= nt, + int64_t pos, Error **errp) +{ + VfuObject *o =3D opaque; + uint64_t end =3D pos + iov_size(iov, iovcnt); + int i; + + if (end > o->vfu_mig_buf_size) { + o->vfu_mig_buf =3D g_realloc(o->vfu_mig_buf, end); + } + + for (i =3D 0; i < iovcnt; i++) { + memcpy((o->vfu_mig_buf + o->vfu_mig_buf_size), iov[i].iov_base, + iov[i].iov_len); + o->vfu_mig_buf_size +=3D iov[i].iov_len; + o->vfu_mig_buf_pending +=3D iov[i].iov_len; + } + + return iov_size(iov, iovcnt); +} + +static int vfu_mig_buf_shutdown(void *opaque, bool rd, bool wr, Error **er= rp) +{ + VfuObject *o =3D opaque; + + o->vfu_mig_buf_size =3D 0; + + g_free(o->vfu_mig_buf); + + return 0; +} + +static const QEMUFileOps vfu_mig_fops_save =3D { + .writev_buffer =3D vfu_mig_buf_write, + .shut_down =3D vfu_mig_buf_shutdown, +}; + +static const QEMUFileOps vfu_mig_fops_load =3D { + .get_buffer =3D vfu_mig_buf_read, + .shut_down =3D vfu_mig_buf_shutdown, +}; + +/** + * handlers for vfu_migration_callbacks_t + * + * The libvfio-user library accesses these handlers to drive the migration + * at the remote end, and also to transport the data stored in vfu_mig_buf + * + */ +static void vfu_mig_state_precopy(vfu_ctx_t *vfu_ctx) +{ + VfuObject *o =3D vfu_get_private(vfu_ctx); + int ret; + + if (!o->vfu_mig_file) { + o->vfu_mig_file =3D qemu_fopen_ops(o, &vfu_mig_fops_save); + } + + global_state_store(); + + ret =3D qemu_remote_savevm(o->vfu_mig_file); + if (ret) { + qemu_file_shutdown(o->vfu_mig_file); + return; + } + + qemu_fflush(o->vfu_mig_file); + + bdrv_inactivate_all(); +} + +static void vfu_mig_state_running(vfu_ctx_t *vfu_ctx) +{ + VfuObject *o =3D vfu_get_private(vfu_ctx); + Error *local_err =3D NULL; + int ret; + + ret =3D qemu_remote_loadvm(o->vfu_mig_file); + if (ret) { + error_setg(&error_abort, "vfu: failed to restore device state"); + return; + } + + bdrv_invalidate_cache_all(&local_err); + if (local_err) { + error_report_err(local_err); + return; + } + + vm_start(); +} + +static int vfu_mig_transition(vfu_ctx_t *vfu_ctx, vfu_migr_state_t state) +{ + switch (state) { + case VFU_MIGR_STATE_RESUME: + case VFU_MIGR_STATE_STOP_AND_COPY: + case VFU_MIGR_STATE_STOP: + break; + case VFU_MIGR_STATE_PRE_COPY: + vfu_mig_state_precopy(vfu_ctx); + break; + case VFU_MIGR_STATE_RUNNING: + if (!runstate_is_running()) { + vfu_mig_state_running(vfu_ctx); + } + break; + default: + warn_report("vfu: Unknown migration state %d", state); + } + + return 0; +} + +static uint64_t vfu_mig_get_pending_bytes(vfu_ctx_t *vfu_ctx) +{ + VfuObject *o =3D vfu_get_private(vfu_ctx); + + return o->vfu_mig_buf_pending; +} + +static int vfu_mig_prepare_data(vfu_ctx_t *vfu_ctx, uint64_t *offset, + uint64_t *size) +{ + VfuObject *o =3D vfu_get_private(vfu_ctx); + + if (offset) { + *offset =3D 0; + } + + if (size) { + *size =3D o->vfu_mig_buf_size; + } + + return 0; +} + +static ssize_t vfu_mig_read_data(vfu_ctx_t *vfu_ctx, void *buf, + uint64_t size, uint64_t offset) +{ + VfuObject *o =3D vfu_get_private(vfu_ctx); + + if (offset > o->vfu_mig_buf_size) { + return -1; + } + + if ((offset + size) > o->vfu_mig_buf_size) { + warn_report("vfu: buffer overflow - check pending_bytes"); + size =3D o->vfu_mig_buf_size - offset; + } + + memcpy(buf, (o->vfu_mig_buf + offset), size); + + o->vfu_mig_buf_pending -=3D size; + + return size; +} + +static ssize_t vfu_mig_write_data(vfu_ctx_t *vfu_ctx, void *data, + uint64_t size, uint64_t offset) +{ + VfuObject *o =3D vfu_get_private(vfu_ctx); + uint64_t end =3D offset + size; + + if (end > o->vfu_mig_buf_size) { + o->vfu_mig_buf =3D g_realloc(o->vfu_mig_buf, end); + o->vfu_mig_buf_size =3D end; + } + + memcpy((o->vfu_mig_buf + offset), data, size); + + if (!o->vfu_mig_file) { + o->vfu_mig_file =3D qemu_fopen_ops(o, &vfu_mig_fops_load); + } + + return size; +} + +static int vfu_mig_data_written(vfu_ctx_t *vfu_ctx, uint64_t count) +{ + return 0; +} + +static const vfu_migration_callbacks_t vfu_mig_cbs =3D { + .version =3D VFU_MIGR_CALLBACKS_VERS, + .transition =3D &vfu_mig_transition, + .get_pending_bytes =3D &vfu_mig_get_pending_bytes, + .prepare_data =3D &vfu_mig_prepare_data, + .read_data =3D &vfu_mig_read_data, + .data_written =3D &vfu_mig_data_written, + .write_data =3D &vfu_mig_write_data, +}; + static void *vfu_object_ctx_run(void *opaque) { VfuObject *o =3D opaque; @@ -332,6 +581,7 @@ static void vfu_object_machine_done(Notifier *notifier,= void *data) { VfuObject *o =3D container_of(notifier, VfuObject, machine_done); DeviceState *dev =3D NULL; + size_t migr_area_size; int ret; =20 o->vfu_ctx =3D vfu_create_ctx(VFU_TRANS_SOCK, o->socket, 0, @@ -391,6 +641,35 @@ static void vfu_object_machine_done(Notifier *notifier= , void *data) return; } =20 + /* + * TODO: The 0x20000 number used below is a temporary. We are working = on + * a cleaner fix for this. + * + * The libvfio-user library assumes that the remote knows the size= of + * the data to be migrated at boot time, but that is not the case = with + * VMSDs, as it can contain a variable-size buffer. 0x20000 is used + * as a sufficiently large buffer to demonstrate migration, but th= at + * cannot be used as a solution. + * + */ + ret =3D vfu_setup_region(o->vfu_ctx, VFU_PCI_DEV_MIGR_REGION_IDX, + 0x20000, NULL, + VFU_REGION_FLAG_RW, NULL, 0, -1, 0); + if (ret < 0) { + error_setg(&error_abort, "vfu: Failed to register migration BAR %s= - %s", + o->devid, strerror(errno)); + return; + } + + migr_area_size =3D vfu_get_migr_register_area_size(); + ret =3D vfu_setup_device_migration_callbacks(o->vfu_ctx, &vfu_mig_cbs, + migr_area_size); + if (ret < 0) { + error_setg(&error_abort, "vfu: Failed to setup migration %s- %s", + o->devid, strerror(errno)); + return; + } + qemu_thread_create(&o->vfu_ctx_thread, "VFU ctx runner", vfu_object_ct= x_run, o, QEMU_THREAD_JOINABLE); } @@ -412,6 +691,14 @@ static void vfu_object_init(Object *obj) =20 o->machine_done.notify =3D vfu_object_machine_done; qemu_add_machine_init_done_notifier(&o->machine_done); + + o->vfu_mig_file =3D NULL; + + o->vfu_mig_buf =3D NULL; + + o->vfu_mig_buf_size =3D 0; + + o->vfu_mig_buf_pending =3D 0; } =20 static void vfu_object_finalize(Object *obj) diff --git a/migration/savevm.c b/migration/savevm.c index 72848b9..c2279af 100644 --- a/migration/savevm.c +++ b/migration/savevm.c @@ -1603,6 +1603,33 @@ static int qemu_savevm_state(QEMUFile *f, Error **er= rp) return ret; } =20 +int qemu_remote_savevm(QEMUFile *f) +{ + SaveStateEntry *se; + int ret; + + QTAILQ_FOREACH(se, &savevm_state.handlers, entry) { + if (!se->vmsd || !vmstate_save_needed(se->vmsd, se->opaque)) { + continue; + } + + save_section_header(f, se, QEMU_VM_SECTION_FULL); + + ret =3D vmstate_save(f, se, NULL); + if (ret) { + qemu_file_set_error(f, ret); + return ret; + } + + save_section_footer(f, se); + } + + qemu_put_byte(f, QEMU_VM_EOF); + qemu_fflush(f); + + return 0; +} + void qemu_savevm_live_state(QEMUFile *f) { /* save QEMU_VM_SECTION_END section */ @@ -2443,6 +2470,42 @@ qemu_loadvm_section_start_full(QEMUFile *f, Migratio= nIncomingState *mis) return 0; } =20 +int qemu_remote_loadvm(QEMUFile *f) +{ + uint8_t section_type; + int ret =3D 0; + + qemu_mutex_lock_iothread(); + + while (true) { + section_type =3D qemu_get_byte(f); + + if (qemu_file_get_error(f)) { + ret =3D qemu_file_get_error(f); + break; + } + + switch (section_type) { + case QEMU_VM_SECTION_FULL: + ret =3D qemu_loadvm_section_start_full(f, NULL); + if (ret < 0) { + break; + } + break; + case QEMU_VM_EOF: + goto out; + default: + ret =3D -EINVAL; + goto out; + } + } + +out: + qemu_mutex_unlock_iothread(); + + return ret; +} + static int qemu_loadvm_section_part_end(QEMUFile *f, MigrationIncomingState *mis) { --=20 1.8.3.1 From nobody Sat May 18 06:04:12 2024 Delivered-To: importer@patchew.org Authentication-Results: mx.zohomail.com; dkim=pass; spf=pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) smtp.mailfrom=qemu-devel-bounces+importer=patchew.org@nongnu.org; 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charset="utf-8" Acceptance test for libvfio-user in QEMU Signed-off-by: Elena Ufimtseva Signed-off-by: John G Johnson Signed-off-by: Jagannathan Raman --- MAINTAINERS | 1 + tests/acceptance/vfio-user.py | 94 +++++++++++++++++++++++++++++++++++++++= ++++ 2 files changed, 95 insertions(+) create mode 100644 tests/acceptance/vfio-user.py diff --git a/MAINTAINERS b/MAINTAINERS index 46ab6b6..644bd35 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -3381,6 +3381,7 @@ 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 +F: tests/acceptance/vfio-user.py =20 EBPF: M: Jason Wang diff --git a/tests/acceptance/vfio-user.py b/tests/acceptance/vfio-user.py new file mode 100644 index 0000000..ef318d9 --- /dev/null +++ b/tests/acceptance/vfio-user.py @@ -0,0 +1,94 @@ +# vfio-user protocol sanity test +# +# This work is licensed under the terms of the GNU GPL, version 2 or +# later. See the COPYING file in the top-level directory. + + +import os +import socket +import uuid + +from avocado_qemu import Test +from avocado_qemu import wait_for_console_pattern +from avocado_qemu import exec_command +from avocado_qemu import exec_command_and_wait_for_pattern + +class VfioUser(Test): + """ + :avocado: tags=3Dvfiouser + """ + KERNEL_COMMON_COMMAND_LINE =3D 'printk.time=3D0 ' + + def do_test(self, kernel_url, initrd_url, kernel_command_line, + machine_type): + """Main test method""" + self.require_accelerator('kvm') + + kernel_path =3D self.fetch_asset(kernel_url) + initrd_path =3D self.fetch_asset(initrd_url) + + socket =3D os.path.join('/tmp', str(uuid.uuid4())) + if os.path.exists(socket): + os.remove(socket) + + # Create remote process + remote_vm =3D self.get_vm() + remote_vm.add_args('-machine', 'x-remote') + remote_vm.add_args('-nodefaults') + remote_vm.add_args('-device', 'lsi53c895a,id=3Dlsi1') + remote_vm.add_args('-object', 'vfio-user,id=3Dvfioobj1,' + 'devid=3Dlsi1,socket=3D'+socket) + remote_vm.launch() + + # Create proxy process + self.vm.set_console() + self.vm.add_args('-machine', machine_type) + self.vm.add_args('-accel', 'kvm') + self.vm.add_args('-cpu', 'host') + self.vm.add_args('-object', + 'memory-backend-memfd,id=3Dsysmem-file,size=3D2G') + self.vm.add_args('--numa', 'node,memdev=3Dsysmem-file') + self.vm.add_args('-m', '2048') + self.vm.add_args('-kernel', kernel_path, + '-initrd', initrd_path, + '-append', kernel_command_line) + self.vm.add_args('-device', + 'vfio-user-pci,' + 'socket=3D'+socket) + self.vm.launch() + wait_for_console_pattern(self, 'as init process', + 'Kernel panic - not syncing') + exec_command(self, 'mount -t sysfs sysfs /sys') + exec_command_and_wait_for_pattern(self, + 'cat /sys/bus/pci/devices/*/ueve= nt', + 'PCI_ID=3D1000:0012') + + def test_multiprocess_x86_64(self): + """ + :avocado: tags=3Darch:x86_64 + """ + kernel_url =3D ('https://archives.fedoraproject.org/pub/archive/fe= dora' + '/linux/releases/31/Everything/x86_64/os/images' + '/pxeboot/vmlinuz') + initrd_url =3D ('https://archives.fedoraproject.org/pub/archive/fe= dora' + '/linux/releases/31/Everything/x86_64/os/images' + '/pxeboot/initrd.img') + kernel_command_line =3D (self.KERNEL_COMMON_COMMAND_LINE + + 'console=3DttyS0 rdinit=3D/bin/bash') + machine_type =3D 'pc' + self.do_test(kernel_url, initrd_url, kernel_command_line, machine_= type) + + def test_multiprocess_aarch64(self): + """ + :avocado: tags=3Darch:aarch64 + """ + kernel_url =3D ('https://archives.fedoraproject.org/pub/archive/fe= dora' + '/linux/releases/31/Everything/aarch64/os/images' + '/pxeboot/vmlinuz') + initrd_url =3D ('https://archives.fedoraproject.org/pub/archive/fe= dora' + '/linux/releases/31/Everything/aarch64/os/images' + '/pxeboot/initrd.img') + kernel_command_line =3D (self.KERNEL_COMMON_COMMAND_LINE + + 'rdinit=3D/bin/bash console=3DttyAMA0') + machine_type =3D 'virt,gic-version=3D3' + self.do_test(kernel_url, initrd_url, kernel_command_line, machine_= type) --=20 1.8.3.1