c40c046341
Teach QEMU to use /dev/userfaultfd when it existed and fallback to the system call if either it's not there or doesn't have enough permission. Firstly, as long as the app has permission to access /dev/userfaultfd, it always have the ability to trap kernel faults which QEMU mostly wants. Meanwhile, in some context (e.g. containers) the userfaultfd syscall can be forbidden, so it can be the major way to use postcopy in a restricted environment with strict seccomp setup. Signed-off-by: Peter Xu <peterx@redhat.com> Reviewed-by: Juan Quintela <quintela@redhat.com> Signed-off-by: Juan Quintela <quintela@redhat.com>
108 lines
7 KiB
Plaintext
108 lines
7 KiB
Plaintext
# See docs/devel/tracing.rst for syntax documentation.
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# aio-posix.c
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run_poll_handlers_begin(void *ctx, int64_t max_ns, int64_t timeout) "ctx %p max_ns %"PRId64 " timeout %"PRId64
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run_poll_handlers_end(void *ctx, bool progress, int64_t timeout) "ctx %p progress %d new timeout %"PRId64
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poll_shrink(void *ctx, int64_t old, int64_t new) "ctx %p old %"PRId64" new %"PRId64
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poll_grow(void *ctx, int64_t old, int64_t new) "ctx %p old %"PRId64" new %"PRId64
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poll_add(void *ctx, void *node, int fd, unsigned revents) "ctx %p node %p fd %d revents 0x%x"
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poll_remove(void *ctx, void *node, int fd) "ctx %p node %p fd %d"
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# async.c
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aio_co_schedule(void *ctx, void *co) "ctx %p co %p"
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aio_co_schedule_bh_cb(void *ctx, void *co) "ctx %p co %p"
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# thread-pool.c
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thread_pool_submit(void *pool, void *req, void *opaque) "pool %p req %p opaque %p"
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thread_pool_complete(void *pool, void *req, void *opaque, int ret) "pool %p req %p opaque %p ret %d"
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thread_pool_cancel(void *req, void *opaque) "req %p opaque %p"
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# buffer.c
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buffer_resize(const char *buf, size_t olen, size_t len) "%s: old %zd, new %zd"
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buffer_move_empty(const char *buf, size_t len, const char *from) "%s: %zd bytes from %s"
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buffer_move(const char *buf, size_t len, const char *from) "%s: %zd bytes from %s"
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buffer_free(const char *buf, size_t len) "%s: capacity %zd"
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# filemonitor-inotify.c
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qemu_file_monitor_add_watch(void *mon, const char *dirpath, const char *filename, void *cb, void *opaque, int64_t id) "File monitor %p add watch dir='%s' file='%s' cb=%p opaque=%p id=%" PRId64
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qemu_file_monitor_remove_watch(void *mon, const char *dirpath, int64_t id) "File monitor %p remove watch dir='%s' id=%" PRId64
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qemu_file_monitor_new(void *mon, int fd) "File monitor %p created fd=%d"
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qemu_file_monitor_enable_watch(void *mon, const char *dirpath, int id) "File monitor %p enable watch dir='%s' id=%u"
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qemu_file_monitor_disable_watch(void *mon, const char *dirpath, int id) "File monitor %p disable watch dir='%s' id=%u"
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qemu_file_monitor_event(void *mon, const char *dirpath, const char *filename, int mask, unsigned int id) "File monitor %p event dir='%s' file='%s' mask=0x%x id=%u"
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qemu_file_monitor_dispatch(void *mon, const char *dirpath, const char *filename, int ev, void *cb, void *opaque, int64_t id) "File monitor %p dispatch dir='%s' file='%s' ev=%d cb=%p opaque=%p id=%" PRId64
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# qemu-coroutine.c
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qemu_aio_coroutine_enter(void *ctx, void *from, void *to, void *opaque) "ctx %p from %p to %p opaque %p"
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qemu_coroutine_yield(void *from, void *to) "from %p to %p"
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qemu_coroutine_terminate(void *co) "self %p"
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# qemu-coroutine-lock.c
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qemu_co_mutex_lock_uncontended(void *mutex, void *self) "mutex %p self %p"
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qemu_co_mutex_lock_entry(void *mutex, void *self) "mutex %p self %p"
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qemu_co_mutex_lock_return(void *mutex, void *self) "mutex %p self %p"
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qemu_co_mutex_unlock_entry(void *mutex, void *self) "mutex %p self %p"
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qemu_co_mutex_unlock_return(void *mutex, void *self) "mutex %p self %p"
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# oslib-posix.c
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# oslib-win32.c
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qemu_memalign(size_t alignment, size_t size, void *ptr) "alignment %zu size %zu ptr %p"
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qemu_anon_ram_alloc(size_t size, void *ptr) "size %zu ptr %p"
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qemu_vfree(void *ptr) "ptr %p"
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qemu_anon_ram_free(void *ptr, size_t size) "ptr %p size %zu"
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# hbitmap.c
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hbitmap_iter_skip_words(const void *hb, void *hbi, uint64_t pos, unsigned long cur) "hb %p hbi %p pos %"PRId64" cur 0x%lx"
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hbitmap_reset(void *hb, uint64_t start, uint64_t count, uint64_t sbit, uint64_t ebit) "hb %p items %"PRIu64",%"PRIu64" bits %"PRIu64"..%"PRIu64
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hbitmap_set(void *hb, uint64_t start, uint64_t count, uint64_t sbit, uint64_t ebit) "hb %p items %"PRIu64",%"PRIu64" bits %"PRIu64"..%"PRIu64
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# lockcnt.c
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lockcnt_fast_path_attempt(const void *lockcnt, int expected, int new) "lockcnt %p fast path %d->%d"
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lockcnt_fast_path_success(const void *lockcnt, int expected, int new) "lockcnt %p fast path %d->%d succeeded"
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lockcnt_unlock_attempt(const void *lockcnt, int expected, int new) "lockcnt %p unlock %d->%d"
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lockcnt_unlock_success(const void *lockcnt, int expected, int new) "lockcnt %p unlock %d->%d succeeded"
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lockcnt_futex_wait_prepare(const void *lockcnt, int expected, int new) "lockcnt %p preparing slow path %d->%d"
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lockcnt_futex_wait(const void *lockcnt, int val) "lockcnt %p waiting on %d"
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lockcnt_futex_wait_resume(const void *lockcnt, int new) "lockcnt %p after wait: %d"
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lockcnt_futex_wake(const void *lockcnt) "lockcnt %p waking up one waiter"
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# qemu-sockets.c
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socket_listen(int num) "backlog: %d"
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# qemu-thread-common.h
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# qemu-thread-posix.c
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# qemu-thread-win32.c
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qemu_mutex_lock(void *mutex, const char *file, const int line) "waiting on mutex %p (%s:%d)"
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qemu_mutex_locked(void *mutex, const char *file, const int line) "taken mutex %p (%s:%d)"
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qemu_mutex_unlock(void *mutex, const char *file, const int line) "released mutex %p (%s:%d)"
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# vfio-helpers.c
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qemu_vfio_dma_reset_temporary(void *s) "s %p"
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qemu_vfio_ram_block_added(void *s, void *p, size_t size) "s %p host %p size 0x%zx"
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qemu_vfio_ram_block_removed(void *s, void *p, size_t size) "s %p host %p size 0x%zx"
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qemu_vfio_dump_mapping(void *host, uint64_t iova, size_t size) "vfio mapping %p to iova 0x%08" PRIx64 " size 0x%zx"
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qemu_vfio_find_mapping(void *s, void *p) "s %p host %p"
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qemu_vfio_new_mapping(void *s, void *host, size_t size, int index, uint64_t iova) "s %p host %p size 0x%zx index %d iova 0x%"PRIx64
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qemu_vfio_do_mapping(void *s, void *host, uint64_t iova, size_t size) "s %p host %p <-> iova 0x%"PRIx64 " size 0x%zx"
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qemu_vfio_dma_map(void *s, void *host, size_t size, bool temporary, uint64_t *iova) "s %p host %p size 0x%zx temporary %d &iova %p"
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qemu_vfio_dma_mapped(void *s, void *host, uint64_t iova, size_t size) "s %p host %p <-> iova 0x%"PRIx64" size 0x%zx"
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qemu_vfio_dma_unmap(void *s, void *host) "s %p host %p"
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qemu_vfio_pci_read_config(void *buf, int ofs, int size, uint64_t region_ofs, uint64_t region_size) "read cfg ptr %p ofs 0x%x size 0x%x (region addr 0x%"PRIx64" size 0x%"PRIx64")"
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qemu_vfio_pci_write_config(void *buf, int ofs, int size, uint64_t region_ofs, uint64_t region_size) "write cfg ptr %p ofs 0x%x size 0x%x (region addr 0x%"PRIx64" size 0x%"PRIx64")"
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qemu_vfio_region_info(const char *desc, uint64_t region_ofs, uint64_t region_size, uint32_t cap_offset) "region '%s' addr 0x%"PRIx64" size 0x%"PRIx64" cap_ofs 0x%"PRIx32
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qemu_vfio_pci_map_bar(int index, uint64_t region_ofs, uint64_t region_size, int ofs, void *host) "map region bar#%d addr 0x%"PRIx64" size 0x%"PRIx64" ofs 0x%x host %p"
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#userfaultfd.c
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uffd_detect_open_mode(int mode) "%d"
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uffd_query_features_nosys(int err) "errno: %i"
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uffd_query_features_api_failed(int err) "errno: %i"
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uffd_create_fd_nosys(int err) "errno: %i"
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uffd_create_fd_api_failed(int err) "errno: %i"
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uffd_create_fd_api_noioctl(uint64_t ioctl_req, uint64_t ioctl_supp) "ioctl_req: 0x%" PRIx64 "ioctl_supp: 0x%" PRIx64
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uffd_register_memory_failed(void *addr, uint64_t length, uint64_t mode, int err) "addr: %p length: %" PRIu64 " mode: 0x%" PRIx64 " errno: %i"
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uffd_unregister_memory_failed(void *addr, uint64_t length, int err) "addr: %p length: %" PRIu64 " errno: %i"
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# module.c
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module_load_module(const char *name) "file %s"
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module_lookup_object_type(const char *name) "name %s"
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