| lists.openwall.net | lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC | |
|
Open Source and information security mailing list archives
| ||
|
Message-ID: <20091203212026.GA32476@elte.hu>
Date: Thu, 3 Dec 2009 22:20:26 +0100
From: Ingo Molnar <mingo@...e.hu>
To: Linus Torvalds <torvalds@...ux-foundation.org>
Cc: linux-kernel@...r.kernel.org, Thomas Gleixner <tglx@...utronix.de>,
"H. Peter Anvin" <hpa@...or.com>,
Andrew Morton <akpm@...ux-foundation.org>
Subject: [GIT PULL] x86/setup for v2.6.33
Linus,
Please pull the latest x86-setup-for-linus git tree from:
git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip.git x86-setup-for-linus
out-of-topic modifications in x86-setup-for-linus:
--------------------------------------------------
drivers/char/vt.c # f6c06b6: vc: Add support for hiding the cu
drivers/video/console/vgacon.c # b434a68: vgacon: Add support for setting t
# f6c06b6: vc: Add support for hiding the cu
include/linux/screen_info.h # d9b2635: x86, setup: Store the boot cursor
include/linux/vt_kern.h # f6c06b6: vc: Add support for hiding the cu
Thanks,
Ingo
------------------>
Matthew Garrett (3):
x86, setup: Store the boot cursor state
vc: Add support for hiding the cursor when creating VTs
vgacon: Add support for setting the default cursor state
Documentation/kernel-parameters.txt | 9 +++++++++
arch/x86/boot/video.c | 6 ++++++
drivers/char/vt.c | 11 ++++++++++-
drivers/video/console/vgacon.c | 5 +++++
include/linux/screen_info.h | 5 ++++-
include/linux/vt_kern.h | 3 +++
6 files changed, 37 insertions(+), 2 deletions(-)
diff --git a/Documentation/kernel-parameters.txt b/Documentation/kernel-parameters.txt
index 9107b38..dd42eb6 100644
--- a/Documentation/kernel-parameters.txt
+++ b/Documentation/kernel-parameters.txt
@@ -2729,6 +2729,15 @@ and is between 256 and 4096 characters. It is defined in the file
Default is 1, i.e. UTF-8 mode is enabled for all
newly opened terminals.
+ vt.global_cursor_default=
+ [VT]
+ Format=<-1|0|1>
+ Set system-wide default for whether a cursor
+ is shown on new VTs. Default is -1,
+ i.e. cursors will be created by default unless
+ overridden by individual drivers. 0 will hide
+ cursors, 1 will display them.
+
waveartist= [HW,OSS]
Format: <io>,<irq>,<dma>,<dma2>
diff --git a/arch/x86/boot/video.c b/arch/x86/boot/video.c
index d42da38..f767164 100644
--- a/arch/x86/boot/video.c
+++ b/arch/x86/boot/video.c
@@ -27,6 +27,12 @@ static void store_cursor_position(void)
boot_params.screen_info.orig_x = oreg.dl;
boot_params.screen_info.orig_y = oreg.dh;
+
+ if (oreg.ch & 0x20)
+ boot_params.screen_info.flags |= VIDEO_FLAGS_NOCURSOR;
+
+ if ((oreg.ch & 0x1f) > (oreg.cl & 0x1f))
+ boot_params.screen_info.flags |= VIDEO_FLAGS_NOCURSOR;
}
static void store_video_mode(void)
diff --git a/drivers/char/vt.c b/drivers/char/vt.c
index 0c80c68..1e3d728 100644
--- a/drivers/char/vt.c
+++ b/drivers/char/vt.c
@@ -161,6 +161,8 @@ static void set_palette(struct vc_data *vc);
static int printable; /* Is console ready for printing? */
int default_utf8 = true;
module_param(default_utf8, int, S_IRUGO | S_IWUSR);
+int global_cursor_default = -1;
+module_param(global_cursor_default, int, S_IRUGO | S_IWUSR);
/*
* ignore_poke: don't unblank the screen when things are typed. This is
@@ -775,6 +777,12 @@ int vc_allocate(unsigned int currcons) /* return 0 on success */
vc_cons[currcons].d = NULL;
return -ENOMEM;
}
+
+ /* If no drivers have overridden us and the user didn't pass a
+ boot option, default to displaying the cursor */
+ if (global_cursor_default == -1)
+ global_cursor_default = 1;
+
vc_init(vc, vc->vc_rows, vc->vc_cols, 1);
vcs_make_sysfs(currcons);
atomic_notifier_call_chain(&vt_notifier_list, VT_ALLOCATE, ¶m);
@@ -1616,7 +1624,7 @@ static void reset_terminal(struct vc_data *vc, int do_clear)
vc->vc_decscnm = 0;
vc->vc_decom = 0;
vc->vc_decawm = 1;
- vc->vc_deccm = 1;
+ vc->vc_deccm = global_cursor_default;
vc->vc_decim = 0;
set_kbd(vc, decarm);
@@ -4078,6 +4086,7 @@ EXPORT_SYMBOL(fg_console);
EXPORT_SYMBOL(console_blank_hook);
EXPORT_SYMBOL(console_blanked);
EXPORT_SYMBOL(vc_cons);
+EXPORT_SYMBOL(global_cursor_default);
#ifndef VT_SINGLE_DRIVER
EXPORT_SYMBOL(take_over_console);
EXPORT_SYMBOL(give_up_console);
diff --git a/drivers/video/console/vgacon.c b/drivers/video/console/vgacon.c
index da55cca..cc4bbbe 100644
--- a/drivers/video/console/vgacon.c
+++ b/drivers/video/console/vgacon.c
@@ -585,6 +585,11 @@ static void vgacon_init(struct vc_data *c, int init)
vgacon_uni_pagedir[1]++;
if (!vgacon_uni_pagedir[0] && p)
con_set_default_unimap(c);
+
+ /* Only set the default if the user didn't deliberately override it */
+ if (global_cursor_default == -1)
+ global_cursor_default =
+ !(screen_info.flags & VIDEO_FLAGS_NOCURSOR);
}
static void vgacon_deinit(struct vc_data *c)
diff --git a/include/linux/screen_info.h b/include/linux/screen_info.h
index 1ee2c05..899fbb4 100644
--- a/include/linux/screen_info.h
+++ b/include/linux/screen_info.h
@@ -14,7 +14,8 @@ struct screen_info {
__u16 orig_video_page; /* 0x04 */
__u8 orig_video_mode; /* 0x06 */
__u8 orig_video_cols; /* 0x07 */
- __u16 unused2; /* 0x08 */
+ __u8 flags; /* 0x08 */
+ __u8 unused2; /* 0x09 */
__u16 orig_video_ega_bx;/* 0x0a */
__u16 unused3; /* 0x0c */
__u8 orig_video_lines; /* 0x0e */
@@ -65,6 +66,8 @@ struct screen_info {
#define VIDEO_TYPE_EFI 0x70 /* EFI graphic mode */
+#define VIDEO_FLAGS_NOCURSOR (1 << 0) /* The video mode has no cursor set */
+
#ifdef __KERNEL__
extern struct screen_info screen_info;
diff --git a/include/linux/vt_kern.h b/include/linux/vt_kern.h
index c0c4e11..7f56db4 100644
--- a/include/linux/vt_kern.h
+++ b/include/linux/vt_kern.h
@@ -110,6 +110,7 @@ extern char con_buf[CON_BUF_SIZE];
extern struct mutex con_buf_mtx;
extern char vt_dont_switch;
extern int default_utf8;
+extern int global_cursor_default;
struct vt_spawn_console {
spinlock_t lock;
@@ -130,4 +131,6 @@ struct vt_notifier_param {
extern int register_vt_notifier(struct notifier_block *nb);
extern int unregister_vt_notifier(struct notifier_block *nb);
+extern void hide_boot_cursor(bool hide);
+
#endif /* _VT_KERN_H */
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/
Powered by blists - more mailing lists