From f627a39c5e7539502624648aeb69e9ff0de2b8e5 Mon Sep 17 00:00:00 2001
From: Jan Beulich <jbeulich@suse.com>
Date: Fri, 18 Feb 2022 14:44:32 +0100
Subject: [PATCH] video/vesa: unmap frame buffer when relinquishing console
MIME-Version: 1.0
Content-Type: text/plain; charset=utf8
Content-Transfer-Encoding: 8bit

There's no point in keeping the VA space occupied when no further output
will occur.

Signed-off-by: Jan Beulich <jbeulich@suse.com>
Reviewed-by: Roger Pau Monné <roger.pau@citrix.com>
Acked-by: Andrew Cooper <andrew.cooper3@citrix.com>
---
 xen/drivers/video/lfb.c  | 1 +
 xen/drivers/video/vesa.c | 2 ++
 2 files changed, 3 insertions(+)

diff --git a/xen/drivers/video/lfb.c b/xen/drivers/video/lfb.c
index 75b749b330..9254b5e902 100644
--- a/xen/drivers/video/lfb.c
+++ b/xen/drivers/video/lfb.c
@@ -168,4 +168,5 @@ void lfb_free(void)
     xfree(lfb.lbuf);
     xfree(lfb.text_buf);
     xfree(lfb.line_len);
+    lfb.lfbp.lfb = ZERO_BLOCK_PTR;
 }
diff --git a/xen/drivers/video/vesa.c b/xen/drivers/video/vesa.c
index f9169f701f..b9bdfc1670 100644
--- a/xen/drivers/video/vesa.c
+++ b/xen/drivers/video/vesa.c
@@ -197,5 +197,7 @@ void __init vesa_endboot(bool_t keep)
                    vlfb_info.width * bpp);
         lfb_flush();
         lfb_free();
+        iounmap(lfb);
+        lfb = ZERO_BLOCK_PTR;
     }
 }
-- 
2.30.2