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[v3,0/2] util/userfaultfd: Support /dev/userfaultfd

Message ID 20230207205711.1187216-1-peterx@redhat.com
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Series util/userfaultfd: Support /dev/userfaultfd | expand

Message

Peter Xu Feb. 7, 2023, 8:57 p.m. UTC 
To Juan: from what I observe on how to update the linux headers, I think it
can simply be in a pull just like a normal patch.

The most recent change and its pull for reference:

https://lore.kernel.org/all/20220915091035.3897-1-chenyi.qiang@intel.com/
https://lore.kernel.org/all/20220926170804.453855-1-thuth@redhat.com/

Changelog:

v3:
- Remove __linux__ macro check in util/userfaultfd.c [Juan]
- Avoid using globals, merge functions [Juan]

v2:
- Added R-bs for Phil
- Move open_mode into uffd_detect_open_mode() [Phil]
- Document uffd_open() in the header file [Phil]
- [Discussed with Daniel/Michal, decided to leave fd support for later]

The new /dev/userfaultfd handle is superior to the system call with a
better permission control and also works for a restricted seccomp
environment.

The new device was only introduced in v6.1 so we need a header update.

Please have a look, thanks.

Peter Xu (2):
  linux-headers: Update to v6.1
  util/userfaultfd: Support /dev/userfaultfd

 include/standard-headers/drm/drm_fourcc.h     |  34 ++++-
 include/standard-headers/linux/ethtool.h      |  63 +++++++-
 include/standard-headers/linux/fuse.h         |   6 +-
 .../linux/input-event-codes.h                 |   1 +
 include/standard-headers/linux/virtio_blk.h   |  19 +++
 linux-headers/asm-generic/hugetlb_encode.h    |  26 ++--
 linux-headers/asm-generic/mman-common.h       |   2 +
 linux-headers/asm-mips/mman.h                 |   2 +
 linux-headers/asm-riscv/kvm.h                 |   4 +
 linux-headers/linux/kvm.h                     |   1 +
 linux-headers/linux/psci.h                    |  14 ++
 linux-headers/linux/userfaultfd.h             |   4 +
 linux-headers/linux/vfio.h                    | 142 ++++++++++++++++++
 util/trace-events                             |   1 +
 util/userfaultfd.c                            |  32 ++++
 15 files changed, 331 insertions(+), 20 deletions(-)