diff --git a/xen/common/domctl.c b/xen/common/domctl.c
index 2c0331bb05..30cca9a4ae 100644
--- a/xen/common/domctl.c
+++ b/xen/common/domctl.c
@@ -8,6 +8,7 @@
 
 #include <xen/types.h>
 #include <xen/lib.h>
+#include <xen/llc-coloring.h>
 #include <xen/err.h>
 #include <xen/mm.h>
 #include <xen/sched.h>
@@ -864,6 +865,15 @@ long do_domctl(XEN_GUEST_HANDLE_PARAM(xen_domctl_t) u_domctl)
                 __HYPERVISOR_domctl, "h", u_domctl);
         break;
 
+    case XEN_DOMCTL_set_llc_colors:
+        if ( op->u.set_llc_colors.pad )
+            ret = -EINVAL;
+        else if ( llc_coloring_enabled )
+            ret = domain_set_llc_colors(d, &op->u.set_llc_colors);
+        else
+            ret = -EOPNOTSUPP;
+        break;
+
     default:
         ret = arch_do_domctl(op, d, u_domctl);
         break;
diff --git a/xen/common/llc-coloring.c b/xen/common/llc-coloring.c
index 26270cda9c..ecfeb0ce82 100644
--- a/xen/common/llc-coloring.c
+++ b/xen/common/llc-coloring.c
@@ -4,6 +4,7 @@
  *
  * Copyright (C) 2022 Xilinx Inc.
  */
+#include <xen/guest_access.h>
 #include <xen/keyhandler.h>
 #include <xen/llc-coloring.h>
 #include <xen/param.h>
@@ -103,8 +104,7 @@ static void print_colors(const unsigned int *colors, unsigned int num_colors)
     printk(" }\n");
 }
 
-static bool __init check_colors(const unsigned int *colors,
-                                unsigned int num_colors)
+static bool check_colors(const unsigned int *colors, unsigned int num_colors)
 {
     unsigned int i;
 
@@ -180,7 +180,7 @@ void domain_dump_llc_colors(const struct domain *d)
     print_colors(d->llc_colors, d->num_llc_colors);
 }
 
-static void __init domain_set_default_colors(struct domain *d)
+static void domain_set_default_colors(struct domain *d)
 {
     printk(XENLOG_WARNING
            "LLC color config not found for %pd, using all colors\n", d);
@@ -226,6 +226,46 @@ void domain_llc_coloring_free(struct domain *d)
     xfree(__va(__pa(d->llc_colors)));
 }
 
+int domain_set_llc_colors(struct domain *d,
+                          const struct xen_domctl_set_llc_colors *config)
+{
+    unsigned int *colors;
+
+    if ( d->num_llc_colors )
+        return -EEXIST;
+
+    if ( !config->num_llc_colors )
+    {
+        domain_set_default_colors(d);
+        return 0;
+    }
+
+    if ( config->num_llc_colors > max_nr_colors )
+        return -EINVAL;
+
+    colors = xmalloc_array(unsigned int, config->num_llc_colors);
+    if ( !colors )
+        return -ENOMEM;
+
+    if ( copy_from_guest(colors, config->llc_colors, config->num_llc_colors) )
+    {
+        xfree(colors);
+        return -EFAULT;
+    }
+
+    if ( !check_colors(colors, config->num_llc_colors) )
+    {
+        printk(XENLOG_ERR "Bad LLC color config for %pd\n", d);
+        xfree(colors);
+        return -EINVAL;
+    }
+
+    d->llc_colors = colors;
+    d->num_llc_colors = config->num_llc_colors;
+
+    return 0;
+}
+
 /*
  * Local variables:
  * mode: C
diff --git a/xen/include/public/domctl.h b/xen/include/public/domctl.h
index a33f9ec32b..d44eac8775 100644
--- a/xen/include/public/domctl.h
+++ b/xen/include/public/domctl.h
@@ -1190,6 +1190,13 @@ struct xen_domctl_vmtrace_op {
 typedef struct xen_domctl_vmtrace_op xen_domctl_vmtrace_op_t;
 DEFINE_XEN_GUEST_HANDLE(xen_domctl_vmtrace_op_t);
 
+struct xen_domctl_set_llc_colors {
+    /* IN LLC coloring parameters */
+    uint32_t num_llc_colors;
+    uint32_t pad;
+    XEN_GUEST_HANDLE_64(uint32) llc_colors;
+};
+
 struct xen_domctl {
     uint32_t cmd;
 #define XEN_DOMCTL_createdomain                   1
@@ -1277,6 +1284,7 @@ struct xen_domctl {
 #define XEN_DOMCTL_vmtrace_op                    84
 #define XEN_DOMCTL_get_paging_mempool_size       85
 #define XEN_DOMCTL_set_paging_mempool_size       86
+#define XEN_DOMCTL_set_llc_colors                87
 #define XEN_DOMCTL_gdbsx_guestmemio            1000
 #define XEN_DOMCTL_gdbsx_pausevcpu             1001
 #define XEN_DOMCTL_gdbsx_unpausevcpu           1002
@@ -1339,6 +1347,7 @@ struct xen_domctl {
         struct xen_domctl_vuart_op          vuart_op;
         struct xen_domctl_vmtrace_op        vmtrace_op;
         struct xen_domctl_paging_mempool    paging_mempool;
+        struct xen_domctl_set_llc_colors    set_llc_colors;
         uint8_t                             pad[128];
     } u;
 };
diff --git a/xen/include/xen/llc-coloring.h b/xen/include/xen/llc-coloring.h
index ee82932266..b3801fca00 100644
--- a/xen/include/xen/llc-coloring.h
+++ b/xen/include/xen/llc-coloring.h
@@ -29,6 +29,8 @@ static inline void domain_llc_coloring_free(struct domain *d) {}
 unsigned int get_llc_way_size(void);
 void arch_llc_coloring_init(void);
 int dom0_set_llc_colors(struct domain *d);
+int domain_set_llc_colors(struct domain *d,
+                          const struct xen_domctl_set_llc_colors *config);
 
 #endif /* __COLORING_H__ */
 
