diff --git a/arch/x86/xen/enlighten_pv.c b/arch/x86/xen/enlighten_pv.c
index 093b78c8bbec..8732b85d5650 100644
--- a/arch/x86/xen/enlighten_pv.c
+++ b/arch/x86/xen/enlighten_pv.c
@@ -68,6 +68,7 @@
 #include <asm/reboot.h>
 #include <asm/hypervisor.h>
 #include <asm/mach_traps.h>
+#include <asm/mtrr.h>
 #include <asm/mwait.h>
 #include <asm/pci_x86.h>
 #include <asm/cpu.h>
@@ -119,6 +120,54 @@ static int __init parse_xen_msr_safe(char *str)
 }
 early_param("xen_msr_safe", parse_xen_msr_safe);
 
+/* Get MTRR settings from Xen and put them into mtrr_state. */
+static void __init xen_set_mtrr_data(void)
+{
+#ifdef CONFIG_MTRR
+	struct xen_platform_op op = {
+		.cmd = XENPF_read_memtype,
+		.interface_version = XENPF_INTERFACE_VERSION,
+	};
+	unsigned int reg;
+	unsigned long mask;
+	uint32_t eax, width;
+	static struct mtrr_var_range var[MTRR_MAX_VAR_RANGES] __initdata;
+
+	/* Get physical address width (only 64-bit cpus supported). */
+	width = 36;
+	eax = cpuid_eax(0x80000000);
+	if ((eax >> 16) == 0x8000 && eax >= 0x80000008) {
+		eax = cpuid_eax(0x80000008);
+		width = eax & 0xff;
+	}
+
+	for (reg = 0; reg < MTRR_MAX_VAR_RANGES; reg++) {
+		op.u.read_memtype.reg = reg;
+		if (HYPERVISOR_platform_op(&op))
+			break;
+
+		/*
+		 * Only called in dom0, which has all RAM PFNs mapped at
+		 * RAM MFNs, and all PCI space etc. is identity mapped.
+		 * This means we can treat MFN == PFN regarding MTRR settings.
+		 */
+		var[reg].base_lo = op.u.read_memtype.type;
+		var[reg].base_lo |= op.u.read_memtype.mfn << PAGE_SHIFT;
+		var[reg].base_hi = op.u.read_memtype.mfn >> (32 - PAGE_SHIFT);
+		mask = ~((op.u.read_memtype.nr_mfns << PAGE_SHIFT) - 1);
+		mask &= (1UL << width) - 1;
+		if (mask)
+			mask |= MTRR_PHYSMASK_V;
+		var[reg].mask_lo = mask;
+		var[reg].mask_hi = mask >> 32;
+	}
+
+	/* Only overwrite MTRR state if any MTRR could be got from Xen. */
+	if (reg)
+		mtrr_overwrite_state(var, reg, MTRR_TYPE_UNCACHABLE);
+#endif
+}
+
 static void __init xen_pv_init_platform(void)
 {
 	/* PV guests can't operate virtio devices without grants. */
@@ -135,6 +184,9 @@ static void __init xen_pv_init_platform(void)
 
 	/* pvclock is in shared info area */
 	xen_init_time_ops();
+
+	if (xen_initial_domain())
+		xen_set_mtrr_data();
 }
 
 static void __init xen_pv_guest_late_init(void)