Re: [libvirt] [RFC v2 10/16] qemu: add vhost-user-gpu helper unit

From: Marc-André Lureau <marcandre.lureau(a)redhat.com&gt; Similar to the qemu_tpm.c, add a unit with a few functions to start/stop and setup the cgroup of the external vhost-user-gpu process. See function documentation. Signed-off-by: Marc-André Lureau <marcandre.lureau(a)redhat.com&gt; --- src/conf/device_conf.h | 1 + src/qemu/Makefile.inc.am | 2 + src/qemu/qemu_vhost_user_gpu.c | 318 +++++++++++++++++++++++++++++++++ src/qemu/qemu_vhost_user_gpu.h | 48 +++++ 4 files changed, 369 insertions(+) create mode 100644 src/qemu/qemu_vhost_user_gpu.c create mode 100644 src/qemu/qemu_vhost_user_gpu.h diff --git a/src/conf/device_conf.h b/src/conf/device_conf.h index ff7d6c9d5f..79a7ea9fe2 100644 --- a/src/conf/device_conf.h +++ b/src/conf/device_conf.h @@ -175,6 +175,7 @@ struct _virDomainDeviceInfo { * cases we might want to prevent that from happening by * locking the isolation group */ bool isolationGroupLocked; + int vhost_user_fd; }; int virDomainDeviceInfoCopy(virDomainDeviceInfoPtr dst, diff --git a/src/qemu/Makefile.inc.am b/src/qemu/Makefile.inc.am index 2afa67f195..28daf9d426 100644 --- a/src/qemu/Makefile.inc.am +++ b/src/qemu/Makefile.inc.am @@ -56,6 +56,8 @@ QEMU_DRIVER_SOURCES = \ qemu/qemu_qapi.h \ qemu/qemu_tpm.c \ qemu/qemu_tpm.h \ + qemu/qemu_vhost_user_gpu.c \ + qemu/qemu_vhost_user_gpu.h \ $(NULL) diff --git a/src/qemu/qemu_vhost_user_gpu.c b/src/qemu/qemu_vhost_user_gpu.c new file mode 100644 index 0000000000..9007614020 --- /dev/null +++ b/src/qemu/qemu_vhost_user_gpu.c @@ -0,0 +1,318 @@ +/* + * qemu_vhost_user_gpu.c: QEMU vhost-user GPU support + * + * Copyright (C) 2018 Red Hat, Inc. + * + * This library is free software; you can redistribute it and/or + * modify it under the terms of the GNU Lesser General Public + * License as published by the Free Software Foundation; either + * version 2.1 of the License, or (at your option) any later version. + * + * This library is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * Lesser General Public License for more details. + * + * You should have received a copy of the GNU Lesser General Public + * License along with this library. If not, see + * <http://www.gnu.org/licenses/>;. + * + * Author: Marc-André Lureau <marcandre.lureau(a)redhat.com&gt; + */ + +#include <config.h> + +#include "qemu_extdevice.h" +#include "qemu_domain.h" +#include "qemu_security.h" + +#include "conf/domain_conf.h" +#include "vircommand.h" +#include "viralloc.h" +#include "virlog.h" +#include "virutil.h" +#include "virfile.h" +#include "virstring.h" +#include "virtime.h" +#include "virpidfile.h" +#include "qemu_vhost_user_gpu.h" + +#define VIR_FROM_THIS VIR_FROM_NONE + +VIR_LOG_INIT("qemu.vhost-user-gpu") + +/* + * Look up the vhost-user-gpu executable; to be found on the host + */ +static char *vhost_user_gpu_path; + +static int +qemuVhostUserGPUInit(void) +{ + if (!vhost_user_gpu_path) { + vhost_user_gpu_path = virFindFileInPath("vhost-user-gpu");