Index: kernel/arch/amd64/src/asm.S
===================================================================
--- kernel/arch/amd64/src/asm.S	(revision ed88c8e9e48e792fdd0df46568e33e36eb624db3)
+++ kernel/arch/amd64/src/asm.S	(revision 00e8290f885b3dc03a5c5a191983eb336d1e852c)
@@ -398,8 +398,5 @@
 	.asciz "Invalid instruction pointer."
 
-/** Print Unicode character to EGA display.
- *
- * If CONFIG_EGA is undefined or CONFIG_FB is defined
- * then this function does nothing.
+/** Print Unicode character to an early display device.
  *
  * Since the EGA can only display Extended ASCII (usually
@@ -413,4 +410,11 @@
  */
 FUNCTION_BEGIN(early_putwchar)
+
+#if (defined(CONFIG_L4RE_UVMM_EARLY_PRINT))
+	xorl %eax, %eax  /* RAX==0: uvmm's print hypercall */
+	mov %rdi, %rcx   /* RCX:    printed character */
+	vmcall
+#endif
+
 #if ((defined(CONFIG_EGA)) && (!defined(CONFIG_FB)))