Skip to main content

Browse the archive

Revision 59df9f1fb4977b40cfad8d07b0d5baeb3a07e22c authored by Alexei Starovoitov on 15 May 2020, 15:10:36 UTC, committed by Alexei Starovoitov on 15 May 2020, 15:15:07 UTC 
Merge branch 'restrict-bpf_probe_read'
 
Daniel Borkmann says:

====================
Small set of fixes in order to restrict BPF helpers for tracing which are
broken on archs with overlapping address ranges as per discussion in [0].
I've targetted this for -bpf tree so they can be routed as fixes. Thanks!

v1 -> v2:
  - switch to reusable %pks, %pus format specifiers (Yonghong)
    - fixate %s on kernel_ds probing for archs with overlapping addr space

      [0] https://lore.kernel.org/bpf/CAHk-=wjJKo0GVixYLmqPn-Q22WFu0xHaBSjKEo7e7Yw72y5SPQ@mail.gmail.com/T/
====================

Signed-off-by: Alexei Starovoitov <ast@kernel.org>
2 parent s 6d74f64 + b2a5212
Raw File
video.h 
/* SPDX-License-Identifier: GPL-2.0 */
#ifndef __ACPI_VIDEO_H
#define __ACPI_VIDEO_H

#include <linux/errno.h> /* for ENODEV */
#include <linux/types.h> /* for bool */

struct acpi_video_brightness_flags {
	u8 _BCL_no_ac_battery_levels:1;	/* no AC/Battery levels in _BCL */
	u8 _BCL_reversed:1;		/* _BCL package is in a reversed order */
	u8 _BQC_use_index:1;		/* _BQC returns an index value */
};

struct acpi_video_device_brightness {
	int curr;
	int count;
	int *levels;
	struct acpi_video_brightness_flags flags;
};

struct acpi_device;

#define ACPI_VIDEO_CLASS	"video"

#define ACPI_VIDEO_DISPLAY_CRT  1
#define ACPI_VIDEO_DISPLAY_TV   2
#define ACPI_VIDEO_DISPLAY_DVI  3
#define ACPI_VIDEO_DISPLAY_LCD  4

#define ACPI_VIDEO_DISPLAY_LEGACY_MONITOR 0x0100
#define ACPI_VIDEO_DISPLAY_LEGACY_PANEL   0x0110
#define ACPI_VIDEO_DISPLAY_LEGACY_TV      0x0200

#define ACPI_VIDEO_NOTIFY_SWITCH		0x80
#define ACPI_VIDEO_NOTIFY_PROBE			0x81
#define ACPI_VIDEO_NOTIFY_CYCLE			0x82
#define ACPI_VIDEO_NOTIFY_NEXT_OUTPUT		0x83
#define ACPI_VIDEO_NOTIFY_PREV_OUTPUT		0x84
#define ACPI_VIDEO_NOTIFY_CYCLE_BRIGHTNESS	0x85
#define ACPI_VIDEO_NOTIFY_INC_BRIGHTNESS	0x86
#define ACPI_VIDEO_NOTIFY_DEC_BRIGHTNESS	0x87
#define ACPI_VIDEO_NOTIFY_ZERO_BRIGHTNESS	0x88
#define ACPI_VIDEO_NOTIFY_DISPLAY_OFF		0x89

enum acpi_backlight_type {
	acpi_backlight_undef = -1,
	acpi_backlight_none = 0,
	acpi_backlight_video,
	acpi_backlight_vendor,
	acpi_backlight_native,
};

#if IS_ENABLED(CONFIG_ACPI_VIDEO)
extern int acpi_video_register(void);
extern void acpi_video_unregister(void);
extern int acpi_video_get_edid(struct acpi_device *device, int type,
			       int device_id, void **edid);
extern enum acpi_backlight_type acpi_video_get_backlight_type(void);
extern void acpi_video_set_dmi_backlight_type(enum acpi_backlight_type type);
/*
 * Note: The value returned by acpi_video_handles_brightness_key_presses()
 * may change over time and should not be cached.
 */
extern bool acpi_video_handles_brightness_key_presses(void);
extern int acpi_video_get_levels(struct acpi_device *device,
				 struct acpi_video_device_brightness **dev_br,
				 int *pmax_level);
#else
static inline int acpi_video_register(void) { return -ENODEV; }
static inline void acpi_video_unregister(void) { return; }
static inline int acpi_video_get_edid(struct acpi_device *device, int type,
				      int device_id, void **edid)
{
	return -ENODEV;
}
static inline enum acpi_backlight_type acpi_video_get_backlight_type(void)
{
	return acpi_backlight_vendor;
}
static inline void acpi_video_set_dmi_backlight_type(enum acpi_backlight_type type)
{
}
static inline bool acpi_video_handles_brightness_key_presses(void)
{
	return false;
}
static inline int acpi_video_get_levels(struct acpi_device *device,
			struct acpi_video_device_brightness **dev_br,
			int *pmax_level)
{
	return -ENODEV;
}
#endif

#endif
back to top