From 384d5cfe5d7e391a5584492bb2ce5794cbd691a9 Mon Sep 17 00:00:00 2001
From: Peng Fan <peng.fan@nxp.com>
Date: Thu, 6 Aug 2020 12:42:50 +0300
Subject: serial: serial_xen: Add Xen PV serial driver

Add support for Xen para-virtualized serial driver. This
driver fully supports serial console for the virtual machine.

Please note that as the driver is initialized late, so no banner
nor memory size is visible.

Signed-off-by: Peng Fan <peng.fan@nxp.com>
Signed-off-by: Oleksandr Andrushchenko <oleksandr_andrushchenko@epam.com>
Signed-off-by: Anastasiia Lukianenko <anastasiia_lukianenko@epam.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
---
 drivers/xen/events.c | 4 ++++
 1 file changed, 4 insertions(+)

(limited to 'drivers/xen/events.c')

diff --git a/drivers/xen/events.c b/drivers/xen/events.c
index b4c84814c5..beaccded69 100644
--- a/drivers/xen/events.c
+++ b/drivers/xen/events.c
@@ -23,6 +23,8 @@
 #include <xen/events.h>
 #include <xen/hvm.h>
 
+extern u32 console_evtchn;
+
 #define NR_EVS 1024
 
 /**
@@ -49,6 +51,8 @@ void unbind_all_ports(void)
 	struct vcpu_info *vcpu_info = &s->vcpu_info[cpu];
 
 	for (i = 0; i < NR_EVS; i++) {
+		if (i == console_evtchn)
+			continue;
 		if (test_and_clear_bit(i, bound_ports)) {
 			printf("port %d still bound!\n", i);
 			unbind_evtchn(i);
-- 
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