Index: linux-2.6/drivers/kvm/kvm_main.c
===================================================================
--- linux-2.6.orig/drivers/kvm/kvm_main.c
+++ linux-2.6/drivers/kvm/kvm_main.c
@@ -90,6 +90,9 @@ unsigned long segment_base(u16 selector)
 	typedef unsigned long ul;
 	unsigned long v;
 
+	if (selector == 0)
+		return 0;
+
 	asm ("sgdt %0" : "=m"(gdt));
 	table_base = gdt.base;
 
Index: linux-2.6/drivers/kvm/vmx.c
===================================================================
--- linux-2.6.orig/drivers/kvm/vmx.c
+++ linux-2.6/drivers/kvm/vmx.c
@@ -1702,6 +1702,9 @@ again:
 #ifdef __x86_64__
 	vmcs_writel(HOST_FS_BASE, read_msr(MSR_FS_BASE));
 	vmcs_writel(HOST_GS_BASE, read_msr(MSR_GS_BASE));
+#else
+	vmcs_writel(HOST_FS_BASE, segment_base(fs_sel));
+	vmcs_writel(HOST_GS_BASE, segment_base(gs_sel));
 #endif
 
 	if (vcpu->irq_summary &&