Jan Beulich
2007-Aug-09 13:12 UTC
[Xen-devel] [PATCH] linux/x86: retrieve VESA capabilities in dom0
Subject: Obtain VESA capabilities and attributes of VESA mode
Also, move some more common code to dom0_init_screen_info().
This was tested on 2.6.22.1, and only made apply to 2.6.18 without
further testing.
Signed-off-by: Jan Beulich <jbeulich@novell.com>
Index: head-2007-08-07/arch/i386/kernel/setup-xen.c
==================================================================---
head-2007-08-07.orig/arch/i386/kernel/setup-xen.c 2007-08-07 10:40:43.000000000
+0200
+++ head-2007-08-07/arch/i386/kernel/setup-xen.c 2007-08-09 12:21:12.000000000
+0200
@@ -1669,23 +1669,12 @@ void __init setup_arch(char **cmdline_p)
bootloader_type = LOADER_TYPE;
if (is_initial_xendomain()) {
- /* This is drawn from a dump from vgacon:startup in
- * standard Linux. */
- screen_info.orig_video_mode = 3;
- screen_info.orig_video_isVGA = 1;
- screen_info.orig_video_lines = 25;
- screen_info.orig_video_cols = 80;
- screen_info.orig_video_ega_bx = 3;
- screen_info.orig_video_points = 16;
- screen_info.orig_y = screen_info.orig_video_lines - 1;
- if (xen_start_info->console.dom0.info_size >- sizeof(struct
dom0_vga_console_info)) {
- const struct dom0_vga_console_info *info - (struct dom0_vga_console_info
*)(
- (char *)xen_start_info +
- xen_start_info->console.dom0.info_off);
- dom0_init_screen_info(info);
- }
+ const struct dom0_vga_console_info *info + (void *)((char *)xen_start_info
+
+ xen_start_info->console.dom0.info_off);
+
+ dom0_init_screen_info(info,
+ xen_start_info->console.dom0.info_size);
xen_start_info->console.domU.mfn = 0;
xen_start_info->console.domU.evtchn = 0;
} else
Index: head-2007-08-07/arch/x86_64/kernel/setup-xen.c
==================================================================---
head-2007-08-07.orig/arch/x86_64/kernel/setup-xen.c 2007-08-07
10:40:43.000000000 +0200
+++ head-2007-08-07/arch/x86_64/kernel/setup-xen.c 2007-08-09 12:21:07.000000000
+0200
@@ -594,23 +594,12 @@ void __init setup_arch(char **cmdline_p)
screen_info = SCREEN_INFO;
if (is_initial_xendomain()) {
- /* This is drawn from a dump from vgacon:startup in
- * standard Linux. */
- screen_info.orig_video_mode = 3;
- screen_info.orig_video_isVGA = 1;
- screen_info.orig_video_lines = 25;
- screen_info.orig_video_cols = 80;
- screen_info.orig_video_ega_bx = 3;
- screen_info.orig_video_points = 16;
- screen_info.orig_y = screen_info.orig_video_lines - 1;
- if (xen_start_info->console.dom0.info_size >- sizeof(struct
dom0_vga_console_info)) {
- const struct dom0_vga_console_info *info - (struct dom0_vga_console_info
*)(
- (char *)xen_start_info +
- xen_start_info->console.dom0.info_off);
- dom0_init_screen_info(info);
- }
+ const struct dom0_vga_console_info *info + (void *)((char *)xen_start_info
+
+ xen_start_info->console.dom0.info_off);
+
+ dom0_init_screen_info(info,
+ xen_start_info->console.dom0.info_size);
xen_start_info->console.domU.mfn = 0;
xen_start_info->console.domU.evtchn = 0;
} else
Index: head-2007-08-07/drivers/xen/console/console.c
==================================================================---
head-2007-08-07.orig/drivers/xen/console/console.c 2007-08-07 10:14:35.000000000
+0200
+++ head-2007-08-07/drivers/xen/console/console.c 2007-08-09 12:54:01.000000000
+0200
@@ -288,13 +288,23 @@
}
-void dom0_init_screen_info(const struct dom0_vga_console_info *info)
+void __init dom0_init_screen_info(const struct dom0_vga_console_info *info,
size_t size)
{
+ /* This is drawn from a dump from vgacon:startup in
+ * standard Linux. */
+ screen_info.orig_video_mode = 3;
+ screen_info.orig_video_isVGA = 1;
+ screen_info.orig_video_lines = 25;
+ screen_info.orig_video_cols = 80;
+ screen_info.orig_video_ega_bx = 3;
+ screen_info.orig_video_points = 16;
+ screen_info.orig_y = screen_info.orig_video_lines - 1;
+
switch (info->video_type) {
case XEN_VGATYPE_TEXT_MODE_3:
- screen_info.orig_video_mode = 3;
- screen_info.orig_video_ega_bx = 3;
- screen_info.orig_video_isVGA = 1;
+ if (size < offsetof(struct dom0_vga_console_info, u.text_mode_3)
+ + sizeof(info->u.text_mode_3))
+ break;
screen_info.orig_video_lines = info->u.text_mode_3.rows;
screen_info.orig_video_cols = info->u.text_mode_3.columns;
screen_info.orig_x = info->u.text_mode_3.cursor_x;
@@ -302,7 +312,11 @@ void dom0_init_screen_info(const struct
screen_info.orig_video_points info->u.text_mode_3.font_height;
break;
+
case XEN_VGATYPE_VESA_LFB:
+ if (size < offsetof(struct dom0_vga_console_info,
+ u.vesa_lfb.capabilities))
+ break;
screen_info.orig_video_isVGA = VIDEO_TYPE_VLFB;
screen_info.lfb_width = info->u.vesa_lfb.width;
screen_info.lfb_height = info->u.vesa_lfb.height;
@@ -318,6 +332,14 @@ void dom0_init_screen_info(const struct
screen_info.blue_pos = info->u.vesa_lfb.blue_pos;
screen_info.rsvd_size = info->u.vesa_lfb.rsvd_size;
screen_info.rsvd_pos = info->u.vesa_lfb.rsvd_pos;
+ if (size >= offsetof(struct dom0_vga_console_info,
+ u.vesa_lfb.capabilities)
+ + sizeof(info->u.vesa_lfb.capabilities))
+ screen_info.capabilities = info->u.vesa_lfb.capabilities;
+ if (size >= offsetof(struct dom0_vga_console_info,
+ u.vesa_lfb.attributes)
+ + sizeof(info->u.vesa_lfb.attributes))
+ screen_info.vesa_attributes = info->u.vesa_lfb.attributes;
break;
}
}
Index: head-2007-08-07/include/xen/interface/xen.h
==================================================================---
head-2007-08-07.orig/include/xen/interface/xen.h 2007-08-07 09:34:51.000000000
+0200
+++ head-2007-08-07/include/xen/interface/xen.h 2007-08-09 12:29:56.000000000
+0200
@@ -565,6 +565,12 @@ typedef struct dom0_vga_console_info {
uint8_t green_pos, green_size;
uint8_t blue_pos, blue_size;
uint8_t rsvd_pos, rsvd_size;
+#if __XEN_INTERFACE_VERSION__ >= 0x00030206
+ /* VESA capabilities. */
+ uint32_t capabilities;
+ /* Mode attributes. */
+ uint16_t attributes;
+#endif
} vesa_lfb;
} u;
} dom0_vga_console_info_t;
Index: head-2007-08-07/include/xen/xencons.h
==================================================================---
head-2007-08-07.orig/include/xen/xencons.h 2007-08-07 10:14:35.000000000 +0200
+++ head-2007-08-07/include/xen/xencons.h 2007-08-09 12:10:06.000000000 +0200
@@ -2,7 +2,7 @@
#define __ASM_XENCONS_H__
struct dom0_vga_console_info;
-void dom0_init_screen_info(const struct dom0_vga_console_info *info);
+void dom0_init_screen_info(const struct dom0_vga_console_info *, size_t);
void xencons_force_flush(void);
void xencons_resume(void);
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