linux-kernel - [tip:x86/setup] x86, setup: Store the boot cursor state

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

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <tip-d9b263528e01bfbaf716b51f38606b3dfe5ac1e9@git.kernel.org>
Date:	Sat, 14 Nov 2009 00:09:40 GMT
From:	tip-bot for Matthew Garrett <mjg@...hat.com>
To:	linux-tip-commits@...r.kernel.org
Cc:	linux-kernel@...r.kernel.org, mjg@...hat.com, hpa@...or.com,
	mingo@...hat.com, tglx@...utronix.de
Subject: [tip:x86/setup] x86, setup: Store the boot cursor state

Commit-ID:  d9b263528e01bfbaf716b51f38606b3dfe5ac1e9
Gitweb:     http://git.kernel.org/tip/d9b263528e01bfbaf716b51f38606b3dfe5ac1e9
Author:     Matthew Garrett <mjg@...hat.com>
AuthorDate: Fri, 13 Nov 2009 14:57:00 -0500
Committer:  H. Peter Anvin <hpa@...or.com>
CommitDate: Fri, 13 Nov 2009 14:23:11 -0800

x86, setup: Store the boot cursor state

Add a field to store the boot cursor state and implement this for VGA on
x86. This can then be used to set the default policy for the boot console.

Signed-off-by: Matthew Garrett <mjg@...hat.com>
LKML-Reference: <1258142222-16092-1-git-send-email-mjg@...hat.com>
Signed-off-by: H. Peter Anvin <hpa@...or.com>
---
 arch/x86/boot/video.c       |    6 ++++++
 include/linux/screen_info.h |    5 ++++-
 2 files changed, 10 insertions(+), 1 deletions(-)

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/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;
 
--
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/