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authorJames Morse <james.morse@arm.com>2022-09-02 15:48:16 +0000
committerBorislav Petkov <bp@suse.de>2022-09-22 17:17:59 +0200
commit781096d971dfe3c5f9401a300bdb0b148a600584 (patch)
tree56c9f9c2e0bffe7d1551ffddb81e9388874d6060 /include/linux/resctrl.h
parentb045c215866393419fb960432ed6be69a0113ee1 (diff)
x86/resctrl: Create mba_sc configuration in the rdt_domain
To support resctrl's MBA software controller, the architecture must provide a second configuration array to hold the mbps_val[] from user-space. This complicates the interface between the architecture specific code and the filesystem portions of resctrl that will move to /fs/, to allow multiple architectures to support resctrl. Make the filesystem parts of resctrl create an array for the mba_sc values. The software controller can be changed to use this, allowing the architecture code to only consider the values configured in hardware. Signed-off-by: James Morse <james.morse@arm.com> Signed-off-by: Borislav Petkov <bp@suse.de> Reviewed-by: Jamie Iles <quic_jiles@quicinc.com> Reviewed-by: Shaopeng Tan <tan.shaopeng@fujitsu.com> Reviewed-by: Reinette Chatre <reinette.chatre@intel.com> Tested-by: Xin Hao <xhao@linux.alibaba.com> Tested-by: Shaopeng Tan <tan.shaopeng@fujitsu.com> Tested-by: Cristian Marussi <cristian.marussi@arm.com> Link: https://lore.kernel.org/r/20220902154829.30399-9-james.morse@arm.com
Diffstat (limited to 'include/linux/resctrl.h')
-rw-r--r--include/linux/resctrl.h7
1 files changed, 7 insertions, 0 deletions
diff --git a/include/linux/resctrl.h b/include/linux/resctrl.h
index 5d283bdd6162..93dfe553b364 100644
--- a/include/linux/resctrl.h
+++ b/include/linux/resctrl.h
@@ -15,6 +15,9 @@ int proc_resctrl_show(struct seq_file *m,
#endif
+/* max value for struct rdt_domain's mbps_val */
+#define MBA_MAX_MBPS U32_MAX
+
/**
* enum resctrl_conf_type - The type of configuration.
* @CDP_NONE: No prioritisation, both code and data are controlled or monitored.
@@ -53,6 +56,9 @@ struct resctrl_staged_config {
* @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
+ * @mbps_val: When mba_sc is enabled, this holds the array of user
+ * specified control values for mba_sc in MBps, indexed
+ * by closid
*/
struct rdt_domain {
struct list_head list;
@@ -67,6 +73,7 @@ struct rdt_domain {
int cqm_work_cpu;
struct pseudo_lock_region *plr;
struct resctrl_staged_config staged_config[CDP_NUM_TYPES];
+ u32 *mbps_val;
};
/**