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+Linux kernel uprev UAPI investigations
+FEX currently exposes kernel version up to 5.18. Need to investigate UAPI changes to ensure it's safe to uprev.
+
+- 5.19
+  - Seems fine without any changes.
+  - Detected Changes
+    - si_perf_flags added to siginfo. FEX doesn't support.
+    - SO_RCVMARK Added to socket. FEX never touches
+    - agpgart changes. FEX doesn't support.
+    - BPF added some stuff. FEX doesn't support.
+    - io_uring changing some structs. Strictly padded so will just work.
+    - io_uring async ioctls added. FEX doesn't have coverage. Should just work.
+    - landlock added a bit. FEX doesn't care.
+  - Syscalls
+    - None added.
+  - DRM
+    - Already handled. 
+- 6.0
+  - Seems fine without any changes.
+  - Detected Changes
+     - BPF added some stuff. FEX doesn't support.
+     - dma_buf added two new ioctls. FEX doesn't have coverage. Should just work.
+     - io_uring added more flags. Should just work.
+     - v4l2 has some new structs. No coverage. So if it is broken we wouldn't know anyway. Not like x86 apps care about v4l2.
+     - HabanaLabs added some stuff. Don't care if it is broken.
+  - Syscalls
+    - None added.
+  - DRM
+    - Already handled. 
+- 6.1
+  - Seems fine without any changes.
+  - Detected Changes
+     - MADV_COLLAPSE added. Will just work.
+     - Panfrost added some userspace coredump stuff. Looks padded fine.
+     - More BPF stuff.
+     - io_uring added a couple things. Should just work.
+  - Syscalls
+    - None added.
+  - DRM
+    - Already handled. 
+- 6.2
+  - Seems fine without any changes.
+  - Detected Changes
+     - BPF added more stuff again.
+     - btrfs added some stuff. We don't care about this.
+     - Fuse adds some parallel write support. Will be fine.
+     - iommufd ioctls added. They fucked up tail padding on some of these ioctls but since I have no idea what this is for, I don't care.
+     - landlock added fs_truncate. Will be fine.
+     - HabanaLabs added more things. Still don't care.
+  - Syscalls
+    - None added.
+  - DRM
+    - Already handled. #2590
+- 6.3
+  - Needs work to expose because of the new prctl!
+  - Detected Changes
+     - `drm_amdgpu_info_device` added more elements. Will be fine.
+     - i810 drm removed.
+     - ivpu drm added. This is their FPGA vision system thing. Packing seems fine. Will fall down generic path and print a warning.
+     - mga_drm removed
+     - r128_drm removed
+     - savage_drm removed
+     - sis_drm removed
+     - via_drm removed
+     - BPF added more stuff again.
+     - fuse added some stuff. Should be fine.
+     - prctl PR_{GET,SET}_MDWE added.
+        - This is dangerous for FEX! It disallows allocating any more memory as `WX`. Which means as soon as this is called, FEX's JIT breaks.
+        - Can't be undone once enabled. Will likely need to be emulated in syscall handlers.
+     - rseq adds more fields, should be fine.
+     - v4l2 adds two new ioctls. Don't care. 
+  - Syscalls
+    - None added.
+  - DRM
+    - amdgpu: Adds some more queries to `IOCTL_AMDGPU_INFO`. FEX doesn't care.
+    - msm: Default BO_FLAGS options adds `NO_IMPLICIT`. FEX doesn't care.
+- 6.4+  (Not released as of 2023-04-09)
+  - drm/amdgpu: https://patchwork.freedesktop.org/patch/531519/ 
+  - Needs release before full investigation.
+
+- 6.5
+  - cachestat syscall
+  - new SNDRV ioctls (Needs investigation)
+  - **Things that FEX doesn't care about**
+    - Some drm additions that don't change ABI
+    - bpf additions
+    - New eventfd flags
+    - New fcntl `AT_HANDLE_FID` flag
+    - New FUSE `FUSE_HAS_EXPIRE_ONLY` flag
+    - new io_uring flags
+    - new mount flags
+    - New v4l2 flags
+    - new VFIO flags
+    - new asound flags
+- 6.6
+  - fchmodat syscall
+  - new `DRM_IOCTL_SYNCOBJ_EVENTFD` ioctl (already implemented)
+  - New seccomp flags
+    - `SECCOMP_USER_NOTIF_FD_SYNC_WAKE_UP`
+    - `SECCOMP_IOCTL_NOTIF_SET_FLAGS`
+    - Will matter when FEX supports user_notif
+  - **Things that FEX doesn't care about**
+    - fuse statx thing
+    - io_uring flags
+    - iommufd ioctls
+    - vfio additions
+- 6.7
+  - New syscalls - already implemented
+    -  map_shadow_stack, futex_wake, futex_wait, futex_requeue
+  - **Things that FEX doesn't care about**
+    - btrfs things
+    - new fuse flags
+    - New futex2 flags for 8-bit, 16-bit, 32-bit, 64-bit sizes
+    - io_uring changes
+    - iommufd again
+    - landlock changes
+    - more vfio changes
+- 6.8
+  - syscall additions
+    - statmount, listmount, lsm_get_self_attr, lsm_set_self_attr, lsm_list_modules
+  - more drm ioctl changes
+  - pvr_drm
+  - v3d ioctls
+  - xe_drm
+  - virtgpu drm flags
+  - **Things that FEX doesn't care about**
+    - bpf changes
+    - soft pages flag thing
+    - more iommufd things
+    - kvm changes
+    - lsm stuff
+    - mount flags
+    - netdev changes
+    - sync_file dead line ioctl
+    - v4l2 changes
+    - virtio changes
+    - asound flag changes
+- 6.9
+  - **Things that FEX doesn't care about**
+     - i915 guc change
+     - More bpf changes
+     - fs ioctl changes
+     - fuse changes (fopen passthrough!)
+     - io_uring changes
+     - kfd_ioctl changes
+     - kvm changes
+     - virtio gpu capset changes
+     - virtio sound stuff
+  - auxv 
+    - AT_HWCAP3, AT_HWCAP4
+    - Reserved for PowerPC things, x86 won't use it yet.
+- 6.10
+  - mseal syscall
+  - panthor_drm
+  - xe_drm changes 
+  - fcntl notification flags
+    - Will just get passed through (F_NOTIFY, F_DUPFD_QUERY)
+  - NTSYNC semaphore ioctl!
+    - Nothing for FEX to do here, will get passed through
+  - **Things that FEX doesn't care about**
+    - i915 changes
+    - bpf changes
+    - ethtool changes
+    - landlock flags
+    - trace mmap ioctl
+    - more v4l2 changes
+    - virtio_net changes
+
+- 6.11
+  - getrandom inside of vdso
+  - **Things that FEX doesn't care about**
+    - bpf additions
+    - btrfs additions
+    - ethtool things
+    - procmap_query ioctl - We don't emulate any procfs ioctls
+    - iommufd things?
+    - kfd_ioctl additions
+    - kvm things
+    - landlock things
+    - pi things
+    - mount namespace id ioctl adding
+    - tcp metrics
+    - statx atomic write fields
+- 6.12
+  - some new ioctls
+  - asound added some at least
+  - Needs more investigation
+- 6.13
+  - New drm base ioctl
+  - New xattr syscalls
+  - Needs more investigation.
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