mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
synced 2026-09-13 18:23:44 -04:00
Enable user space applications to access the PHC state page when firmware RDMA completion timestamp is supported. This mapping allows user space to convert RDMA completion timestamps to system wall time without kernel transitions, minimizing latency overhead. Applications can directly read the PHC state through mmap, enabling efficient timestamp correlation for precision timing applications. Co-developed-by: Allen Hubbe <allen.hubbe@amd.com> Signed-off-by: Allen Hubbe <allen.hubbe@amd.com> Signed-off-by: Abhijit Gangurde <abhijit.gangurde@amd.com> Link: https://patch.msgid.link/20260610154216.712374-4-abhijit.gangurde@amd.com Signed-off-by: Leon Romanovsky <leon@kernel.org>