diff --git a/Documentation/x86/intel_rdt_ui.txt b/Documentation/x86/intel_rdt_ui.txt
index 76f21e2ac176..4d8848e4e224 100644
--- a/Documentation/x86/intel_rdt_ui.txt
+++ b/Documentation/x86/intel_rdt_ui.txt
@@ -48,6 +48,13 @@ related to allocation:
 "min_cbm_bits": 	The minimum number of consecutive bits which
 			must be set when writing a mask.
 
+"shareable_bits":	Bitmask of shareable resource with other executing
+			entities (e.g. I/O). User can use this when
+			setting up exclusive cache partitions. Note that
+			some platforms support devices that have their
+			own settings for cache use which can over-ride
+			these bits.
+
 Memory bandwitdh(MB) subdirectory contains the following files
 with respect to allocation:
 
diff --git a/arch/x86/kernel/cpu/intel_rdt.c b/arch/x86/kernel/cpu/intel_rdt.c
index de26aa7971d4..da4f3898d517 100644
--- a/arch/x86/kernel/cpu/intel_rdt.c
+++ b/arch/x86/kernel/cpu/intel_rdt.c
@@ -193,6 +193,7 @@ static inline bool cache_alloc_hsw_probe(void)
 		r->num_closid = 4;
 		r->default_ctrl = max_cbm;
 		r->cache.cbm_len = 20;
+		r->cache.shareable_bits = 0xc0000;
 		r->cache.min_cbm_bits = 2;
 		r->alloc_capable = true;
 		r->alloc_enabled = true;
@@ -260,6 +261,7 @@ static void rdt_get_cache_alloc_cfg(int idx, struct rdt_resource *r)
 	r->num_closid = edx.split.cos_max + 1;
 	r->cache.cbm_len = eax.split.cbm_len + 1;
 	r->default_ctrl = BIT_MASK(eax.split.cbm_len + 1) - 1;
+	r->cache.shareable_bits = ebx & r->default_ctrl;
 	r->data_width = (r->cache.cbm_len + 3) / 4;
 	r->alloc_capable = true;
 	r->alloc_enabled = true;
diff --git a/arch/x86/kernel/cpu/intel_rdt.h b/arch/x86/kernel/cpu/intel_rdt.h
index 94e488af082e..4040bf1a075c 100644
--- a/arch/x86/kernel/cpu/intel_rdt.h
+++ b/arch/x86/kernel/cpu/intel_rdt.h
@@ -227,12 +227,15 @@ struct msr_param {
  * @cbm_idx_offset:	Offset of CBM index. CBM index is computed by:
  *			closid * cbm_idx_multi + cbm_idx_offset
  *			in a cache bit mask
+ * @shareable_bits:	Bitmask of shareable resource with other
+ *			executing entities
  */
 struct rdt_cache {
 	unsigned int	cbm_len;
 	unsigned int	min_cbm_bits;
 	unsigned int	cbm_idx_mult;
 	unsigned int	cbm_idx_offset;
+	unsigned int	shareable_bits;
 };
 
 /**
diff --git a/arch/x86/kernel/cpu/intel_rdt_rdtgroup.c b/arch/x86/kernel/cpu/intel_rdt_rdtgroup.c
index c24dd067b9c5..2621ae3f07fc 100644
--- a/arch/x86/kernel/cpu/intel_rdt_rdtgroup.c
+++ b/arch/x86/kernel/cpu/intel_rdt_rdtgroup.c
@@ -596,6 +596,15 @@ static int rdt_min_cbm_bits_show(struct kernfs_open_file *of,
 	return 0;
 }
 
+static int rdt_shareable_bits_show(struct kernfs_open_file *of,
+				   struct seq_file *seq, void *v)
+{
+	struct rdt_resource *r = of->kn->parent->priv;
+
+	seq_printf(seq, "%x\n", r->cache.shareable_bits);
+	return 0;
+}
+
 static int rdt_min_bw_show(struct kernfs_open_file *of,
 			     struct seq_file *seq, void *v)
 {
@@ -711,6 +720,13 @@ static struct rftype res_common_files[] = {
 		.seq_show	= rdt_min_cbm_bits_show,
 		.fflags		= RF_CTRL_INFO | RFTYPE_RES_CACHE,
 	},
+	{
+		.name		= "shareable_bits",
+		.mode		= 0444,
+		.kf_ops		= &rdtgroup_kf_single_ops,
+		.seq_show	= rdt_shareable_bits_show,
+		.fflags		= RF_CTRL_INFO | RFTYPE_RES_CACHE,
+	},
 	{
 		.name		= "min_bandwidth",
 		.mode		= 0444,