[PATCH 7/7] video/vesa: adjust (not just) command line option handling

[Jan Beulich <jbeulich@xxxxxxxx>]

Document both options. Add section annotations to both variables holding
the parsed values as well as a few adjacent ones. Adjust the types of
font_height and vga_compat.

Signed-off-by: Jan Beulich <jbeulich@xxxxxxxx>

--- a/docs/misc/xen-command-line.pandoc
+++ b/docs/misc/xen-command-line.pandoc
@@ -2369,9 +2369,21 @@ cache-warming. 1ms (1000) has been measu
 ### vesa-map
 > `= <integer>`
 
+> Default: `0`
+
+Specify, in MiB, the portion of video RAM to actually remap.  This will be
+honored only when large enough to cover the space needed for the chosen video
+mode, and only when less than a non-zero value possibly specified through
+'vesa-ram'.
+
 ### vesa-ram
 > `= <integer>`
 
+> Default: `0`
+
+This allows to override the amount of video RAM, in MiB, determined to be
+present.
+
 ### vga
 > `= ( ask | current | text-80x<rows> | gfx-<width>x<height>x<depth> | 
 > mode-<mode> )[,keep]`
 
--- a/xen/drivers/video/vesa.c
+++ b/xen/drivers/video/vesa.c
@@ -19,17 +19,17 @@
 
 static void lfb_flush(void);
 
-static unsigned char *lfb;
-static const struct font_desc *font;
-static bool_t vga_compat;
+static unsigned char *__read_mostly lfb;
+static const struct font_desc *__initdata font;
+static bool __initdata vga_compat;
 
-static unsigned int vram_total;
+static unsigned int __initdata vram_total;
 integer_param("vesa-ram", vram_total);
 
-static unsigned int vram_remap;
+static unsigned int __initdata vram_remap;
 integer_param("vesa-map", vram_remap);
 
-static int font_height;
+static unsigned int __initdata font_height;
 static int __init parse_font_height(const char *s)
 {
     if ( simple_strtoul(s, &s, 10) == 8 && (*s++ == 'x') )