diff --git a/docs/misc/cache-coloring.rst b/docs/misc/cache-coloring.rst
index 5224b27afe..e156062aa2 100644
--- a/docs/misc/cache-coloring.rst
+++ b/docs/misc/cache-coloring.rst
@@ -115,6 +115,8 @@ Specific documentation is available at `docs/misc/xen-command-line.pandoc`.
 +----------------------+-------------------------------+
 | ``buddy-alloc-size`` | Buddy allocator reserved size |
 +----------------------+-------------------------------+
+| ``xen-llc-colors``   | Xen color configuration       |
++----------------------+-------------------------------+
 
 Colors selection format
 ***********************
diff --git a/docs/misc/xen-command-line.pandoc b/docs/misc/xen-command-line.pandoc
index cd43eccc5d..1dd8f714d3 100644
--- a/docs/misc/xen-command-line.pandoc
+++ b/docs/misc/xen-command-line.pandoc
@@ -2927,6 +2927,16 @@ mode.
 **WARNING: `x2apic_phys` is deprecated and superseded by `x2apic-mode`.
 The latter takes precedence if both are set.**
 
+### xen-llc-colors (arm64)
+> `= List of [ <integer> | <integer>-<integer> ]`
+
+> Default: `0: the lowermost color`
+
+Specify Xen LLC color configuration. This options is available only when
+`CONFIG_LLC_COLORING` is enabled.
+Two colors are most likely needed on platforms where private caches are
+physically indexed, e.g. the L1 instruction cache of the Arm Cortex-A57.
+
 ### xenheap_megabytes (arm32)
 > `= <size>`
 
diff --git a/xen/common/llc-coloring.c b/xen/common/llc-coloring.c
index bebd6e2056..0cfaa77a2b 100644
--- a/xen/common/llc-coloring.c
+++ b/xen/common/llc-coloring.c
@@ -13,6 +13,7 @@
 #include <xen/types.h>
 
 #define NR_LLC_COLORS          (1U << CONFIG_LLC_COLORS_ORDER)
+#define XEN_DEFAULT_NUM_COLORS 1
 
 /*
  * -1: not specified (disabled unless llc-size and llc-nr-ways present)
@@ -36,6 +37,9 @@ static unsigned int __ro_after_init default_colors[NR_LLC_COLORS];
 static unsigned int __initdata dom0_colors[NR_LLC_COLORS];
 static unsigned int __initdata dom0_num_colors;
 
+static unsigned int __ro_after_init xen_colors[NR_LLC_COLORS];
+static unsigned int __ro_after_init xen_num_colors;
+
 #define mfn_color_mask              (max_nr_colors - 1)
 #define mfn_to_color(mfn)           (mfn_x(mfn) & mfn_color_mask)
 
@@ -94,6 +98,13 @@ static int __init parse_dom0_colors(const char *s)
 }
 custom_param("dom0-llc-colors", parse_dom0_colors);
 
+static int __init parse_xen_colors(const char *s)
+{
+    return parse_color_config(s, xen_colors, ARRAY_SIZE(xen_colors),
+                              &xen_num_colors);
+}
+custom_param("xen-llc-colors", parse_xen_colors);
+
 static void print_colors(const unsigned int colors[], unsigned int num_colors)
 {
     unsigned int i;
@@ -178,6 +189,22 @@ void __init llc_coloring_init(void)
     for ( i = 0; i < max_nr_colors; i++ )
         default_colors[i] = i;
 
+    if ( !xen_num_colors )
+    {
+        unsigned int i;
+
+        xen_num_colors = MIN(XEN_DEFAULT_NUM_COLORS, max_nr_colors);
+
+        printk(XENLOG_WARNING
+               "Xen LLC color config not found. Using first %u colors\n",
+               xen_num_colors);
+        for ( i = 0; i < xen_num_colors; i++ )
+            xen_colors[i] = i;
+    }
+    else if ( xen_num_colors > max_nr_colors ||
+              !check_colors(xen_colors, xen_num_colors) )
+        panic("Bad LLC color config for Xen\n");
+
     arch_llc_coloring_init();
 }
 
@@ -188,6 +215,8 @@ void dump_llc_coloring_info(void)
 
     printk("LLC coloring info:\n");
     printk("    Number of LLC colors supported: %u\n", max_nr_colors);
+    printk("    Xen LLC colors (%u): ", xen_num_colors);
+    print_colors(xen_colors, xen_num_colors);
 }
 
 void domain_dump_llc_colors(const struct domain *d)