On Thu, Apr 25, 2024 at 02:21:06AM +0000, Hao Xiang wrote: > * DSA device open and close. > * DSA group contains multiple DSA devices. > * DSA group configure/start/stop/clean. > > Signed-off-by: Hao Xiang <hao.xi...@linux.dev> > Signed-off-by: Bryan Zhang <bryan.zh...@bytedance.com> > --- > include/qemu/dsa.h | 72 +++++++++++ > util/dsa.c | 316 +++++++++++++++++++++++++++++++++++++++++++++ > util/meson.build | 1 + > 3 files changed, 389 insertions(+) > create mode 100644 include/qemu/dsa.h > create mode 100644 util/dsa.c > > diff --git a/include/qemu/dsa.h b/include/qemu/dsa.h > new file mode 100644 > index 0000000000..f15c05ee85 > --- /dev/null > +++ b/include/qemu/dsa.h > @@ -0,0 +1,72 @@
Missing license header. > +#ifndef QEMU_DSA_H > +#define QEMU_DSA_H > + > +#include "qemu/error-report.h" > +#include "qemu/thread.h" > +#include "qemu/queue.h" > + > +#ifdef CONFIG_DSA_OPT > + > +#pragma GCC push_options > +#pragma GCC target("enqcmd") > + > +#include <linux/idxd.h> > +#include "x86intrin.h" > + > +/** > + * @brief Initializes DSA devices. > + * > + * @param dsa_parameter A list of DSA device path from migration parameter. > + * > + * @return int Zero if successful, otherwise non zero. > + */ > +int dsa_init(const char *dsa_parameter); > + > +/** > + * @brief Start logic to enable using DSA. > + */ > +void dsa_start(void); > + > +/** > + * @brief Stop the device group and the completion thread. > + */ > +void dsa_stop(void); > + > +/** > + * @brief Clean up system resources created for DSA offloading. > + */ > +void dsa_cleanup(void); > + > +/** > + * @brief Check if DSA is running. > + * > + * @return True if DSA is running, otherwise false. > + */ > +bool dsa_is_running(void); > + > +#else > + > +static inline bool dsa_is_running(void) > +{ > + return false; > +} > + > +static inline int dsa_init(const char *dsa_parameter) > +{ > + if (dsa_parameter != NULL && strlen(dsa_parameter) != 0) { > + error_report("DSA not supported."); Using error_report in this code is undesirable, as it means the migration code has no way to feed error information back to the mgmt app. *all* the APIs in dsa.h/dsa.c that can have errors, need to have an "Error **errp" parameter, so useful info can be propagated back the caller in the migration code. > + return -1; > + } > + > + return 0; > +} > + > +static inline void dsa_start(void) {} > + > +static inline void dsa_stop(void) {} > + > +static inline void dsa_cleanup(void) {} > + > +#endif > + > +#endif > diff --git a/util/dsa.c b/util/dsa.c > new file mode 100644 > index 0000000000..05bbf8e31a > --- /dev/null > +++ b/util/dsa.c > @@ -0,0 +1,316 @@ > +/* > + * Use Intel Data Streaming Accelerator to offload certain background > + * operations. > + * > + * Copyright (c) 2023 Hao Xiang <hao.xi...@bytedance.com> > + * Bryan Zhang <bryan.zh...@bytedance.com> > + * > + * Permission is hereby granted, free of charge, to any person obtaining a > copy > + * of this software and associated documentation files (the "Software"), to > deal > + * in the Software without restriction, including without limitation the > rights > + * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell > + * copies of the Software, and to permit persons to whom the Software is > + * furnished to do so, subject to the following conditions: > + * > + * The above copyright notice and this permission notice shall be included in > + * all copies or substantial portions of the Software. > + * > + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR > + * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, > + * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL > + * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER > + * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING > FROM, > + * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN > + * THE SOFTWARE. > + */ This is an MIT license header, but QEMU's standard license is GPL-2.0-or-later. Please keep new contributions under QEMU's normal license unless there's a reason why you must differ. With regards, Daniel -- |: https://berrange.com -o- https://www.flickr.com/photos/dberrange :| |: https://libvirt.org -o- https://fstop138.berrange.com :| |: https://entangle-photo.org -o- https://www.instagram.com/dberrange :|