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x86/resctrl: Group staged configuration into a separate struct

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When configuration changes are made, the new value is written to struct
rdt_domain's new_ctrl field and the have_new_ctrl flag is set. Later
new_ctrl is copied to hardware by a call to update_domains().

Once the CDP resources are merged, there will be one new_ctrl field in
use by two struct resctrl_schema requiring a per-schema IPI to copy the
value to hardware.

Move new_ctrl and have_new_ctrl into a new struct resctrl_staged_config.
Before the CDP resources can be merged, struct rdt_domain will need an
array of these, one per type of configuration. Using the type as an
index to the array will ensure that a schema configuration string can't
specify the same domain twice.

Signed-off-by: James Morse <james.morse@arm.com>
Signed-off-by: Borislav Petkov <bp@suse.de>
Reviewed-by: Jamie Iles <jamie@nuviainc.com>
Reviewed-by: Reinette Chatre <reinette.chatre@intel.com>
Tested-by: Babu Moger <babu.moger@amd.com>
Link: https://lkml.kernel.org/r/20210728170637.25610-14-james.morse@arm.com
This commit is contained in:
James Morse
2021-07-28 17:06:26 +00:00
committed by Borislav Petkov
parent e198fde3fe
commit e8f7282552
3 changed files with 54 additions and 27 deletions
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16
include/linux/resctrl.h
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@@ -27,13 +27,21 @@ enum resctrl_conf_type {
CDP_DATA,
};
/**
* struct resctrl_staged_config - parsed configuration to be applied
* @new_ctrl: new ctrl value to be loaded
* @have_new_ctrl: whether the user provided new_ctrl is valid
*/
struct resctrl_staged_config {
u32 new_ctrl;
bool have_new_ctrl;
};
/**
* struct rdt_domain - group of CPUs sharing a resctrl resource
* @list: all instances of this resource
* @id: unique id for this instance
* @cpu_mask: which CPUs share this resource
* @new_ctrl: new ctrl value to be loaded
* @have_new_ctrl: did user provide new_ctrl for this domain
* @rmid_busy_llc: bitmap of which limbo RMIDs are above threshold
* @mbm_total: saved state for MBM total bandwidth
* @mbm_local: saved state for MBM local bandwidth
@@ -42,13 +50,12 @@ enum resctrl_conf_type {
* @mbm_work_cpu: worker CPU for MBM h/w counters
* @cqm_work_cpu: worker CPU for CQM h/w counters
* @plr: pseudo-locked region (if any) associated with domain
* @staged_config: parsed configuration to be applied
*/
struct rdt_domain {
struct list_head list;
int id;
struct cpumask cpu_mask;
u32 new_ctrl;
bool have_new_ctrl;
unsigned long *rmid_busy_llc;
struct mbm_state *mbm_total;
struct mbm_state *mbm_local;
@@ -57,6 +64,7 @@ struct rdt_domain {
int mbm_work_cpu;
int cqm_work_cpu;
struct pseudo_lock_region *plr;
struct resctrl_staged_config staged_config;
};
/**