diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig
index 1042d69..bce241f 100644
--- a/arch/x86/Kconfig
+++ b/arch/x86/Kconfig
@@ -235,6 +235,20 @@
 
 	  If you don't know what to do here, say N.
 
+config X86_X2APIC
+	bool "Support x2apic"
+	depends on X86_LOCAL_APIC && X86_64
+	---help---
+	  This enables x2apic support on CPUs that have this feature.
+
+	  This allows 32-bit apic IDs (so it can support very large systems),
+	  and accesses the local apic via MSRs not via mmio.
+
+	  ( On certain CPU models you may need to enable INTR_REMAP too,
+	    to get functional x2apic mode. )
+
+	  If you don't know what to do here, say N.
+
 config SPARSE_IRQ
 	bool "Support sparse irq numbering"
 	depends on PCI_MSI || HT_IRQ
@@ -1828,6 +1842,7 @@
 config INTR_REMAP
 	bool "Support for Interrupt Remapping (EXPERIMENTAL)"
 	depends on X86_64 && X86_IO_APIC && PCI_MSI && ACPI && EXPERIMENTAL
+	select X86_X2APIC
 	---help---
 	  Supports Interrupt remapping for IO-APIC and MSI devices.
 	  To use x2apic mode in the CPU's which support x2APIC enhancements or