3 Commits

Author	SHA1	Message	Date
Shayon Mukherjee	0a32a9ca91	vmm: add compile-time validation for userfaultfd ioctl constants ... Cross-check each UFFDIO_* constant against the Linux _IOC(dir, type, nr, size) encoding formula at compile time so that transposed direction bits or struct sizes are caught immediately rather than silently producing wrong ioctl numbers at runtime. Signed-off-by: Shayon Mukherjee <shayonj@gmail.com>	2026-04-14 14:17:40 +00:00
Zhiheng Tao	df58e814eb	vmm: fix UFFDIO_WAKE and UFFD_FEATURE_MISSING_HUGETLBFS ... UFFDIO_WAKE was 0x4010_aa02 (_IOW) but should be 0x8010_aa02, causing every wake call to silently fail with -EINVAL. UFFD_FEATURE_MISSING_HUGETLBFS was (1<<6) but should be (1<<4), colliding with UFFD_FEATURE_EVENT_UNMAP. Signed-off-by: Zhiheng Tao <junchuan.tzh@antgroup.com>	2026-04-14 11:20:32 +00:00
Shayon Mukherjee	de37f27945	vmm: add userfaultfd constants module ... Add a small constants module with the ioctl numbers and protocol constants needed for userfaultfd-based demand-paged snapshot restore. These are derived from the kernel's include/uapi/linux/userfaultfd.h. Signed-off-by: Shayon Mukherjee <shayonj@gmail.com>	2026-03-13 21:17:21 +00:00