riscv/qemu - qemu - Gitea: Git with a cup of tea

Author	SHA1	Message	Date
Dr. David Alan Gilbert	ccf6b78275	util/userfaultfd: Remove unused uffd_poll_events uffd_poll_events has been unused since it was added; it's also just a wrapper around a plain old poll call, so doesn't add anything. Signed-off-by: Dr. David Alan Gilbert <dave@treblig.org> Reviewed-by: Peter Xu <peterx@redhat.com> Link: https://lore.kernel.org/r/20240919134626.166183-8-dave@treblig.org Signed-off-by: Peter Xu <peterx@redhat.com>	2 years ago
Dr. David Alan Gilbert	6f81bd1a3e	util/userfaultfd: Return -errno on error Convert (the currently unused) uffd_wakeup, uffd_copy_page and uffd_zero_page to return -errno on error rather than -1. That will make it easier to reuse in postcopy. Signed-off-by: Dr. David Alan Gilbert <dave@treblig.org> Reviewed-by: Peter Xu <peterx@redhat.com> Link: https://lore.kernel.org/r/20240919134626.166183-6-dave@treblig.org Signed-off-by: Peter Xu <peterx@redhat.com>	2 years ago
Peter Maydell	493bc2dbc1	misc: Clean up includes This commit was created with scripts/clean-includes: ./scripts/clean-includes --git misc net/af-xdp.c plugins/.c audio/pwaudio.c util/userfaultfd.c All .c should include qemu/osdep.h first. The script performs three related cleanups: Ensure .c files include qemu/osdep.h first. * Including it in a .h is redundant, since the .c already includes it. Drop such inclusions. * Likewise, including headers qemu/osdep.h includes is redundant. Drop these, too. Signed-off-by: Peter Maydell <peter.maydell@linaro.org> Reviewed-by: Zhao Liu <zhao1.liu@intel.com> Signed-off-by: Michael Tokarev <mjt@tls.msk.ru>	2 years ago
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>	3 years ago
Peter Xu	d5890ea072	util/userfaultfd: Add uffd_open() Add a helper to create the uffd handle. Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org> Reviewed-by: Juan Quintela <quintela@redhat.com> Signed-off-by: Peter Xu <peterx@redhat.com> Signed-off-by: Juan Quintela <quintela@redhat.com>	3 years ago
Andrey Gruzdev	0e9b5cd6b2	migration: introduce UFFD-WP low-level interface helpers Glue code to the userfaultfd kernel implementation. Querying feature support, createing file descriptor, feature control, memory region registration, IOCTLs on registered registered regions. Signed-off-by: Andrey Gruzdev <andrey.gruzdev@virtuozzo.com> Reviewed-by: Peter Xu <peterx@redhat.com> Message-Id: <20210129101407.103458-3-andrey.gruzdev@virtuozzo.com> Signed-off-by: Dr. David Alan Gilbert <dgilbert@redhat.com> Fixed up range.start casting for 32bit	5 years ago