kernel/linux.git/samples/vfio-mdev, branch master

vfio: Adapt drivers to use the core helper vfio_check_precopy_ioctl

2026-03-19T18:32:09+00:00

Introduce a core helper function for VFIO_MIG_GET_PRECOPY_INFO and adapt all drivers to use it. It centralizes the common code and ensures that output flags are cleared on entry, in case user opts in to VFIO_DEVICE_FEATURE_MIG_PRECOPY_INFOv2. This preventing any unintended echoing of userspace data back to userspace. Signed-off-by: Yishai Hadas Link: https://lore.kernel.org/r/20260317161753.18964-4-yishaih@nvidia.com Signed-off-by: Alex Williamson

vfio: mdev: replace mtty_dev->vd_class with a const struct class

2026-03-19T18:32:07+00:00

The class_create() call has been deprecated in favor of class_register() as the driver core now allows for a struct class to be in read-only memory. Replace mtty_dev->vd_class with a const struct class and drop the class_create() call. Compile tested and found no errors/warns in dmesg after enabling CONFIG_VFIO and CONFIG_SAMPLE_VFIO_MDEV_MTTY. Link: https://lore.kernel.org/all/2023040244-duffel-pushpin-f738@gregkh/ Suggested-by: Greg Kroah-Hartman Signed-off-by: Jori Koolstra Acked-by: Greg Kroah-Hartman Link: https://lore.kernel.org/r/20260308214939.1215682-1-jkoolstra@xs4all.nl Signed-off-by: Alex Williamson

vfio: Move the remaining drivers to get_region_info_caps

2025-11-12T22:06:41+00:00

Remove the duplicate code and change info to a pointer. caps are not used. Reviewed-by: Kevin Tian Acked-by: Pranjal Shrivastava Signed-off-by: Jason Gunthorpe Link: https://lore.kernel.org/r/21-v2-2a9e24d62f1b+e10a-vfio_get_region_info_op_jgg@nvidia.com Signed-off-by: Alex Williamson

vfio/mbochs: Convert mbochs to use vfio_info_add_capability()

2025-11-12T22:05:02+00:00

This driver open codes the cap chain manipulations. Instead use vfio_info_add_capability() and the get_region_info_caps() op. Reviewed-by: Kevin Tian Signed-off-by: Jason Gunthorpe Link: https://lore.kernel.org/r/16-v2-2a9e24d62f1b+e10a-vfio_get_region_info_op_jgg@nvidia.com Signed-off-by: Alex Williamson

vfio/mbochs: Provide a get_region_info op

2025-11-12T22:05:02+00:00

Move it out of mbochs_ioctl() and re-indent it. Reviewed-by: Kevin Tian Acked-by: Pranjal Shrivastava Signed-off-by: Jason Gunthorpe Link: https://lore.kernel.org/r/8-v2-2a9e24d62f1b+e10a-vfio_get_region_info_op_jgg@nvidia.com Signed-off-by: Alex Williamson

vfio/mdpy: Provide a get_region_info op

2025-11-12T22:05:02+00:00

Move it out of mdpy_ioctl() and re-indent it. Reviewed-by: Kevin Tian Acked-by: Pranjal Shrivastava Signed-off-by: Jason Gunthorpe Link: https://lore.kernel.org/r/7-v2-2a9e24d62f1b+e10a-vfio_get_region_info_op_jgg@nvidia.com Signed-off-by: Alex Williamson

vfio/mtty: Provide a get_region_info op

2025-11-12T22:05:02+00:00

Move it out of mtty_ioctl() and re-indent it. Reviewed-by: Kevin Tian Acked-by: Pranjal Shrivastava Signed-off-by: Jason Gunthorpe Link: https://lore.kernel.org/r/6-v2-2a9e24d62f1b+e10a-vfio_get_region_info_op_jgg@nvidia.com Signed-off-by: Alex Williamson

vfio/mtty: Fix spelling typo in samples/vfio-mdev

2025-11-05T19:10:34+00:00

The comment incorrectly used "atleast" instead of "at least". Signed-off-by: Chu Guangqing Link: https://lore.kernel.org/r/20251015015954.2363-2-chuguangqing@inspur.com Signed-off-by: Alex Williamson

module: Convert symbol namespace to string literal

2024-12-02T19:34:44+00:00

Clean up the existing export namespace code along the same lines of commit 33def8498fdd ("treewide: Convert macro and uses of __section(foo) to __section("foo")") and for the same reason, it is not desired for the namespace argument to be a macro expansion itself. Scripted using git grep -l -e MODULE_IMPORT_NS -e EXPORT_SYMBOL_NS | while read file; do awk -i inplace ' /^#define EXPORT_SYMBOL_NS/ { gsub(/__stringify$ns$/, "ns"); print; next; } /^#define MODULE_IMPORT_NS/ { gsub(/__stringify$ns$/, "ns"); print; next; } /MODULE_IMPORT_NS/ { $0 = gensub(/MODULE_IMPORT_NS$([^)]*)$/, "MODULE_IMPORT_NS(\"\\1\")", "g"); } /EXPORT_SYMBOL_NS/ { if ($0 ~ /(EXPORT_SYMBOL_NS[^(]*)$([^,]+),/) { if ($0 !~ /(EXPORT_SYMBOL_NS[^(]*)\(([^,]+), ([^)]+)$/ && $0 !~ /(EXPORT_SYMBOL_NS[^(]*)/ && $0 !~ /^my/) { getline line; gsub(/[[:space:]]*\\$/, ""); gsub(/[[:space:]]/, "", line); $0 = $0 " " line; } $0 = gensub(/(EXPORT_SYMBOL_NS[^(]*)$([^,]+), ([^)]+)$/, "\\1(\\2, \"\\3\")", "g"); } } { print }' $file; done Requested-by: Masahiro Yamada Signed-off-by: Peter Zijlstra (Intel) Link: https://mail.google.com/mail/u/2/#inbox/FMfcgzQXKWgMmjdFwwdsfgxzKpVHWPlc Acked-by: Greg KH Signed-off-by: Linus Torvalds

[tree-wide] finally take no_llseek out

2024-09-27T15:18:43+00:00

no_llseek had been defined to NULL two years ago, in commit 868941b14441 ("fs: remove no_llseek") To quote that commit, At -rc1 we'll need do a mechanical removal of no_llseek - git grep -l -w no_llseek | grep -v porting.rst | while read i; do sed -i '/\/d' $i done would do it. Unfortunately, that hadn't been done. Linus, could you do that now, so that we could finally put that thing to rest? All instances are of the form .llseek = no_llseek, so it's obviously safe. Signed-off-by: Al Viro Signed-off-by: Linus Torvalds