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| author | Mukesh Kumar Chaurasiya <mchauras@linux.ibm.com> | 2026-04-27 15:27:39 +0300 |
|---|---|---|
| committer | Madhavan Srinivasan <maddy@linux.ibm.com> | 2026-05-20 04:27:14 +0300 |
| commit | d7a6797e0bc1ee7bddb8a298f2d1acddb300efb3 (patch) | |
| tree | 47bad1ee2239117cca73db8d33b2355597436277 /include/linux | |
| parent | 02565a782c1ee7e8ada38ad24a698e01d6ea9ff8 (diff) | |
| download | linux-d7a6797e0bc1ee7bddb8a298f2d1acddb300efb3.tar.xz | |
powerpc: add exit_flags field in pt_regs
Add a new field `exit_flags` in the pt_regs structure. This field will hold
the flags set during interrupt or syscall execution that are required during
exit to user mode.
Specifically, the `TIF_RESTOREALL` flag, stored in this field, helps the
exit routine determine if any NVGPRs were modified and need to be restored
before returning to userspace.
This addition ensures a clean and architecture-specific mechanism to track
per-syscall or per-interrupt state transitions related to register restore.
Changes:
- Add `exit_flags` and `__pt_regs_pad` to maintain 16-byte stack alignment
- Update asm-offsets.c and ptrace.c for offset and validation
- Update PT_* constants in uapi header to reflect the new layout
Signed-off-by: Mukesh Kumar Chaurasiya <mchauras@linux.ibm.com>
Tested-by: Samir M <samir@linux.ibm.com>
Tested-by: David Gow <davidgow@google.com>
Tested-by: Venkat Rao Bagalkote <venkat88@linux.ibm.com>
Reviewed-by: Shrikanth Hegde <sshegde@linux.ibm.com>
Signed-off-by: Madhavan Srinivasan <maddy@linux.ibm.com>
Link: https://patch.msgid.link/20260427122742.210074-6-mkchauras@gmail.com
Diffstat (limited to 'include/linux')
0 files changed, 0 insertions, 0 deletions