[PATCH 0/3] Postcopy migration: Add userfaultfd- user-mode-only capability

[Lin Ma]

Since kernel v5.11, Unprivileged user (without SYS_CAP_PTRACE capability)
must pass UFFD_USER_MODE_ONLY to userfaultd in case unprivileged_userfaultfd
sysctl knob is 0.
Please refer to https://lwn.net/Articles/819834/ and the kernel commits:
37cd0575 userfaultfd: add UFFD_USER_MODE_ONLY
d0d4730a userfaultfd: add user-mode only option to unprivileged_userfaultfd 
sysctl knob

This patch set adds a migration capability to pass UFFD_USER_MODE_ONLY
for postcopy migration.

Lin Ma (3):
  migration: introduce postcopy-uffd-usermode-only capability
  migration: postcopy-uffd-usermode-only documentation
  tests: add postcopy-uffd-usermode-only capability into migration-test

 docs/devel/migration.rst     |  9 +++++++++
 migration/migration.c        |  9 +++++++++
 migration/migration.h        |  1 +
 migration/postcopy-ram.c     | 22 +++++++++++++++++++---
 qapi/migration.json          |  8 +++++++-
 tests/qtest/migration-test.c | 11 +++++++++--
 6 files changed, 54 insertions(+), 6 deletions(-)

-- 
2.26.2