diff options
| -rw-r--r-- | Documentation/arch/x86/resctrl.rst | 4 | ||||
| -rw-r--r-- | arch/x86/kernel/cpu/resctrl/internal.h | 1 | ||||
| -rw-r--r-- | arch/x86/kernel/cpu/resctrl/rdtgroup.c | 23 |
3 files changed, 28 insertions, 0 deletions
diff --git a/Documentation/arch/x86/resctrl.rst b/Documentation/arch/x86/resctrl.rst index 7412252f95a7..a6279df64a9d 100644 --- a/Documentation/arch/x86/resctrl.rst +++ b/Documentation/arch/x86/resctrl.rst @@ -376,6 +376,10 @@ When monitoring is enabled all MON groups will also contain: the sum for all tasks in the CTRL_MON group and all tasks in MON groups. Please see example section for more details on usage. +"mon_hw_id": + Available only with debug option. The identifier used by hardware + for the monitor group. On x86 this is the RMID. + Resource allocation rules ------------------------- diff --git a/arch/x86/kernel/cpu/resctrl/internal.h b/arch/x86/kernel/cpu/resctrl/internal.h index b816b902b5c0..a4f1aa15f0a2 100644 --- a/arch/x86/kernel/cpu/resctrl/internal.h +++ b/arch/x86/kernel/cpu/resctrl/internal.h @@ -254,6 +254,7 @@ struct rdtgroup { #define RFTYPE_MON_INFO (RFTYPE_INFO | RFTYPE_MON) #define RFTYPE_TOP_INFO (RFTYPE_INFO | RFTYPE_TOP) #define RFTYPE_CTRL_BASE (RFTYPE_BASE | RFTYPE_CTRL) +#define RFTYPE_MON_BASE (RFTYPE_BASE | RFTYPE_MON) /* List of all resource groups */ extern struct list_head rdt_all_groups; diff --git a/arch/x86/kernel/cpu/resctrl/rdtgroup.c b/arch/x86/kernel/cpu/resctrl/rdtgroup.c index 5f6d6ba63a2e..69a1de92384a 100644 --- a/arch/x86/kernel/cpu/resctrl/rdtgroup.c +++ b/arch/x86/kernel/cpu/resctrl/rdtgroup.c @@ -795,6 +795,22 @@ static int rdtgroup_closid_show(struct kernfs_open_file *of, return ret; } +static int rdtgroup_rmid_show(struct kernfs_open_file *of, + struct seq_file *s, void *v) +{ + struct rdtgroup *rdtgrp; + int ret = 0; + + rdtgrp = rdtgroup_kn_lock_live(of->kn); + if (rdtgrp) + seq_printf(s, "%u\n", rdtgrp->mon.rmid); + else + ret = -ENOENT; + rdtgroup_kn_unlock(of->kn); + + return ret; +} + #ifdef CONFIG_PROC_CPU_RESCTRL /* @@ -1868,6 +1884,13 @@ static struct rftype res_common_files[] = { .fflags = RFTYPE_BASE, }, { + .name = "mon_hw_id", + .mode = 0444, + .kf_ops = &rdtgroup_kf_single_ops, + .seq_show = rdtgroup_rmid_show, + .fflags = RFTYPE_MON_BASE | RFTYPE_DEBUG, + }, + { .name = "schemata", .mode = 0644, .kf_ops = &rdtgroup_kf_single_ops, |