From: Denis Mukhin <dmukhin@ford.com> 

Add initial Kconfig options configure NS16550-capable emulator.

Signed-off-by: Denis Mukhin <dmukhin@ford.com>
---
Changes since v6:
- new patch
---
 xen/common/emul/vuart/Kconfig | 19 +++++++++++++++++++
 1 file changed, 19 insertions(+)

diff --git a/xen/common/emul/vuart/Kconfig b/xen/common/emul/vuart/Kconfig
index ce1b976b7da7..9a49a6528b5a 100644
--- a/xen/common/emul/vuart/Kconfig
+++ b/xen/common/emul/vuart/Kconfig
@@ -3,4 +3,23 @@ config VUART_FRAMEWORK
 
 menu "UART Emulation"
 
+config VUART_NS16X50
+	bool "NS16550-compatible UART Emulator" if EXPERT
+	depends on X86 && HVM
+	select VUART_FRAMEWORK
+	help
+	  In-hypervisor NS16550-compatible UART emulation.
+
+	  Only one legacy PC COM port is emulated for domain with a certain ID
+	  (set via 'vuart-domid=' command line setting).
+
+	  This is strictly for testing purposes (such as early HVM guest console),
+	  and not appropriate for use in production.
+
+config VUART_NS16X50_DEBUG
+	bool "Development: NS16550-compatible UART Emulator Debugging"
+	depends on VUART_NS16X50 && DEBUG
+	help
+	  Enable development debugging.
+
 endmenu
-- 
2.51.0