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x86/resctrl: Remove rdtgroup from update_cpu_closid_rmid()

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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 <Dave.Martin@arm.com>
Signed-off-by: Dave Martin <Dave.Martin@arm.com>
Signed-off-by: James Morse <james.morse@arm.com>
Signed-off-by: Borislav Petkov (AMD) <bp@alien8.de>
Reviewed-by: Shaopeng Tan <tan.shaopeng@jp.fujitsu.com>
Reviewed-by: Tony Luck <tony.luck@intel.com>
Reviewed-by: Reinette Chatre <reinette.chatre@intel.com>
Reviewed-by: Fenghua Yu <fenghuay@nvidia.com>
Reviewed-by: Babu Moger <babu.moger@amd.com>
Tested-by: Carl Worth <carl@os.amperecomputing.com> # arm64
Tested-by: Shaopeng Tan <tan.shaopeng@jp.fujitsu.com>
Tested-by: Peter Newman <peternewman@google.com>
Tested-by: Amit Singh Tomar <amitsinght@marvell.com> # arm64
Tested-by: Shanker Donthineni <sdonthineni@nvidia.com> # arm64
Tested-by: Babu Moger <babu.moger@amd.com>
Link: https://lore.kernel.org/r/20250311183715.16445-11-james.morse@arm.com
This commit is contained in:
James Morse
2025-03-11 18:36:55 +00:00
committed by Borislav Petkov (AMD)
parent aebd5354dd
commit 6f06aee356
2 changed files with 35 additions and 4 deletions
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include/linux/resctrl.h
+22
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@@ -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.