3 files changed, 62 insertions, 2 deletions

diff --git a/arch/x86/include/asm/intel_rdt.h b/arch/x86/include/asm/intel_rdt.h
index b0f0a600c739..167fe10f00b9 100644
--- a/arch/x86/include/asm/intel_rdt.h
+++ b/arch/x86/include/asm/intel_rdt.h
@@ -174,6 +174,7 @@ struct rdt_resource {
 };
 
 void rdt_get_cache_infofile(struct rdt_resource *r);
+void rdt_get_mba_infofile(struct rdt_resource *r);
 
 extern struct mutex rdtgroup_mutex;
 
diff --git a/arch/x86/kernel/cpu/intel_rdt.c b/arch/x86/kernel/cpu/intel_rdt.c
index b387e04885be..438efefd6862 100644
--- a/arch/x86/kernel/cpu/intel_rdt.c
+++ b/arch/x86/kernel/cpu/intel_rdt.c
@@ -203,6 +203,7 @@ static bool rdt_get_mem_config(struct rdt_resource *r)
                         return false;
         }
         r->data_width = 3;
+        rdt_get_mba_infofile(r);
 
         r->capable = true;
         r->enabled = true;
diff --git a/arch/x86/kernel/cpu/intel_rdt_rdtgroup.c b/arch/x86/kernel/cpu/intel_rdt_rdtgroup.c
index 65d957b96567..f5af0cc7eb0d 100644
--- a/arch/x86/kernel/cpu/intel_rdt_rdtgroup.c
+++ b/arch/x86/kernel/cpu/intel_rdt_rdtgroup.c
@@ -515,7 +515,6 @@ static int rdt_num_closids_show(struct kernfs_open_file *of,
         struct rdt_resource *r = of->kn->parent->priv;
 
         seq_printf(seq, "%d\n", r->num_closid);
-
         return 0;
 }
 
@@ -525,7 +524,6 @@ static int rdt_default_ctrl_show(struct kernfs_open_file *of,
         struct rdt_resource *r = of->kn->parent->priv;
 
         seq_printf(seq, "%x\n", r->default_ctrl);
-
         return 0;
 }
 
@@ -535,7 +533,33 @@ static int rdt_min_cbm_bits_show(struct kernfs_open_file *of,
         struct rdt_resource *r = of->kn->parent->priv;
 
         seq_printf(seq, "%u\n", r->cache.min_cbm_bits);
+        return 0;
+}
+
+static int rdt_min_bw_show(struct kernfs_open_file *of,
+                             struct seq_file *seq, void *v)
+{
+        struct rdt_resource *r = of->kn->parent->priv;
 
+        seq_printf(seq, "%u\n", r->membw.min_bw);
+        return 0;
+}
+
+static int rdt_bw_gran_show(struct kernfs_open_file *of,
+                             struct seq_file *seq, void *v)
+{
+        struct rdt_resource *r = of->kn->parent->priv;
+
+        seq_printf(seq, "%u\n", r->membw.bw_gran);
+        return 0;
+}
+
+static int rdt_delay_linear_show(struct kernfs_open_file *of,
+                             struct seq_file *seq, void *v)
+{
+        struct rdt_resource *r = of->kn->parent->priv;
+
+        seq_printf(seq, "%u\n", r->membw.delay_linear);
         return 0;
 }
 
@@ -561,6 +585,40 @@ static struct rftype res_cache_info_files[] = {
         },
 };
 
+/* rdtgroup information files for memory bandwidth. */
+static struct rftype res_mba_info_files[] = {
+        {
+                .name           = "num_closids",
+                .mode           = 0444,
+                .kf_ops         = &rdtgroup_kf_single_ops,
+                .seq_show       = rdt_num_closids_show,
+        },
+        {
+                .name           = "min_bandwidth",
+                .mode           = 0444,
+                .kf_ops         = &rdtgroup_kf_single_ops,
+                .seq_show       = rdt_min_bw_show,
+        },
+        {
+                .name           = "bandwidth_gran",
+                .mode           = 0444,
+                .kf_ops         = &rdtgroup_kf_single_ops,
+                .seq_show       = rdt_bw_gran_show,
+        },
+        {
+                .name           = "delay_linear",
+                .mode           = 0444,
+                .kf_ops         = &rdtgroup_kf_single_ops,
+                .seq_show       = rdt_delay_linear_show,
+        },
+};
+
+void rdt_get_mba_infofile(struct rdt_resource *r)
+{
+        r->info_files = res_mba_info_files;
+        r->nr_info_files = ARRAY_SIZE(res_mba_info_files);
+}
+
 void rdt_get_cache_infofile(struct rdt_resource *r)
 {
         r->info_files = res_cache_info_files;