From 6f06aee356bfd0c817cbe83debedd240fbed0719 Mon Sep 17 00:00:00 2001 From: James Morse Date: Tue, 11 Mar 2025 18:36:55 +0000 Subject: x86/resctrl: Remove rdtgroup from update_cpu_closid_rmid() update_cpu_closid_rmid() takes a struct rdtgroup as an argument, which it uses to update the local CPUs default pqr values. This is a problem once the resctrl parts move out to /fs/, as the arch code cannot poke around inside struct rdtgroup. Rename update_cpu_closid_rmid() as resctrl_arch_sync_cpus_defaults() to be used as the target of an IPI, and pass the effective CLOSID and RMID in a new struct. Co-developed-by: Dave Martin Signed-off-by: Dave Martin Signed-off-by: James Morse Signed-off-by: Borislav Petkov (AMD) Reviewed-by: Shaopeng Tan Reviewed-by: Tony Luck Reviewed-by: Reinette Chatre Reviewed-by: Fenghua Yu Reviewed-by: Babu Moger Tested-by: Carl Worth # arm64 Tested-by: Shaopeng Tan Tested-by: Peter Newman Tested-by: Amit Singh Tomar # arm64 Tested-by: Shanker Donthineni # arm64 Tested-by: Babu Moger Link: https://lore.kernel.org/r/20250311183715.16445-11-james.morse@arm.com --- include/linux/resctrl.h | 22 ++++++++++++++++++++++ 1 file changed, 22 insertions(+) (limited to 'include/linux') diff --git a/include/linux/resctrl.h b/include/linux/resctrl.h index d16dc960f1fc..31808b3ddecb 100644 --- a/include/linux/resctrl.h +++ b/include/linux/resctrl.h @@ -266,6 +266,28 @@ struct resctrl_schema { u32 num_closid; }; +struct resctrl_cpu_defaults { + u32 closid; + u32 rmid; +}; + +/** + * resctrl_arch_sync_cpu_closid_rmid() - Refresh this CPU's CLOSID and RMID. + * Call via IPI. + * @info: If non-NULL, a pointer to a struct resctrl_cpu_defaults + * specifying the new CLOSID and RMID for tasks in the default + * resctrl ctrl and mon group when running on this CPU. If NULL, + * this CPU is not re-assigned to a different default group. + * + * Propagates reassignment of CPUs and/or tasks to different resctrl groups + * when requested by the resctrl core code. + * + * This function records the per-cpu defaults specified by @info (if any), + * and then reconfigures the CPU's hardware CLOSID and RMID for subsequent + * execution based on @current, in the same way as during a task switch. + */ +void resctrl_arch_sync_cpu_closid_rmid(void *info); + /** * resctrl_get_default_ctrl() - Return the default control value for this * resource. -- cgit v1.2.3