Peter Xu c40c046341 util/userfaultfd: Support /dev/userfaultfd ... 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>		2023-02-11 16:51:09 +01:00
..
aio-posix.c	util/aio: Defer disabling poll mode as long as possible	2023-01-23 15:01:22 -05:00
aio-posix.h
aio-wait.c
aio-win32.c	util/aio-win32: Correct the event array size in aio_poll()	2022-11-06 09:48:26 +01:00
aiocb.c
async-teardown.c	Fix non-first inclusions of qemu/osdep.h	2023-02-08 07:28:05 +01:00
async.c	coroutine: Use Coroutine typedef name instead of structure tag	2023-01-20 07:23:45 +01:00
atomic64.c
base64.c
bitmap.c	migration: Use non-atomic ops for clear log bitmap	2022-11-21 11:58:10 +01:00
bitops.c
block-helpers.c
block-helpers.h
buffer.c
bufferiszero.c	util/bufferiszero: Use __attribute__((target)) for avx2/avx512	2023-01-16 10:14:12 -10:00
cacheflush.c
compatfd.c
coroutine-sigaltstack.c
coroutine-ucontext.c
coroutine-win32.c
crc32c.c
crc-ccitt.c
cutils.c	util: remove support for hex numbers with a scaling suffix	2023-01-06 00:51:02 +01:00
dbus.c
drm.c
envlist.c
error-report.c	util/error: add G_GNUC_PRINTF for various functions	2023-01-11 10:44:34 +01:00
error.c	util/error: add G_GNUC_PRINTF for various functions	2023-01-11 10:44:34 +01:00
event_notifier-posix.c
event_notifier-win32.c
fdmon-epoll.c
fdmon-io_uring.c
fdmon-poll.c
fifo8.c
filemonitor-inotify.c
filemonitor-stub.c
getauxval.c
guest-random.c
hbitmap.c
hexdump.c
host-utils.c
id.c
int128.c	include/qemu/int128: Use Int128 structure for TCI	2023-02-04 06:19:42 -10:00
interval-tree.c	util: Add interval-tree.c	2022-12-20 17:09:41 -08:00
iov.c	util: make do_send_recv work with partial send/recv	2022-10-12 19:22:01 +04:00
iova-tree.c
keyval.c
lockcnt.c
log.c	util/log: Always send errors to logfile when daemonized	2023-01-06 00:50:32 +01:00
main-loop.c	Don't include headers already included by qemu/osdep.h	2023-02-08 07:28:05 +01:00
memalign.c
memfd.c
meson.build	accel: introduce accelerator blocker API	2023-01-11 09:59:39 +01:00
mmap-alloc.c
module.c	module: add Error arguments to module_load and module_load_qom	2022-11-06 09:48:50 +01:00
notify.c
nvdimm-utils.c
osdep.c	error handling: Use RETRY_ON_EINTR() macro where applicable	2023-01-09 13:50:47 +01:00
oslib-posix.c	Drop duplicate #include	2023-02-08 07:28:05 +01:00
oslib-win32.c	util/oslib-win32: Remove obsolete reference to g_poll code	2022-12-15 15:19:24 +01:00
path.c
qdist.c
qemu-co-shared-resource.c
qemu-co-timeout.c
qemu-config.c	util/qemu-config: Fix "query-command-line-options" to provide the right values	2022-12-15 15:19:23 +01:00
qemu-coroutine-io.c
qemu-coroutine-lock.c	coroutine: Clean up superfluous inclusion of qemu/coroutine.h	2023-01-19 10:18:28 +01:00
qemu-coroutine-sleep.c	coroutine: Clean up superfluous inclusion of qemu/coroutine.h	2023-01-19 10:18:28 +01:00
qemu-coroutine.c	coroutine: Clean up superfluous inclusion of qemu/coroutine.h	2023-01-19 10:18:28 +01:00
qemu-option.c
qemu-print.c
qemu-progress.c
qemu-sockets.c	sockets: Use ERRP_GUARD() where obviously appropriate	2022-12-14 16:19:35 +01:00
qemu-thread-common.h
qemu-thread-posix.c	util: Introduce qemu_thread_set_affinity() and qemu_thread_get_affinity()	2022-10-27 11:00:36 +02:00
qemu-thread-win32.c	util: Introduce qemu_thread_set_affinity() and qemu_thread_get_affinity()	2022-10-27 11:00:36 +02:00
qemu-timer-common.c
qemu-timer.c
qht.c	util/qht: use striped locks under TSAN	2023-02-02 11:48:20 +00:00
qsp.c
range.c
rcu.c
readline.c	readline: Extract readline_add_completion_of() from monitor	2023-02-04 07:56:54 +01:00
selfmap.c
stats64.c
sys_membarrier.c
systemd.c
thread-context.c	qapi: Use returned bool to check for failure (again)	2022-12-14 16:19:35 +01:00
thread-pool.c
throttle.c
timed-average.c
trace-events	util/userfaultfd: Support /dev/userfaultfd	2023-02-11 16:51:09 +01:00
trace.h
transactions.c
unicode.c
uri.c
userfaultfd.c	util/userfaultfd: Support /dev/userfaultfd	2023-02-11 16:51:09 +01:00
uuid.c
vfio-helpers.c	error handling: Use RETRY_ON_EINTR() macro where applicable	2023-01-09 13:50:47 +01:00
vhost-user-server.c	io: Add support for MSG_PEEK for socket channel	2023-02-06 19:22:56 +01:00
yank.c