[linux-block.git] / arch / x86 / include / asm / io_bitmap.h

/* SPDX-License-Identifier: GPL-2.0 */
#ifndef _ASM_X86_IOBITMAP_H
#define _ASM_X86_IOBITMAP_H

#include <linux/refcount.h>
#include <asm/processor.h>

struct io_bitmap {
	u64		sequence;
	refcount_t	refcnt;
	/* The maximum number of bytes to copy so all zero bits are covered */
	unsigned int	max;
	unsigned long	bitmap[IO_BITMAP_LONGS];
};

struct task_struct;

#ifdef CONFIG_X86_IOPL_IOPERM
void io_bitmap_share(struct task_struct *tsk);
void io_bitmap_exit(void);

void tss_update_io_bitmap(void);
#else
static inline void io_bitmap_share(struct task_struct *tsk) { }
static inline void io_bitmap_exit(void) { }
static inline void tss_update_io_bitmap(void) { }
#endif

#endif
Commit	Line	Data
577d5cd7 TG	1	/* SPDX-License-Identifier: GPL-2.0 */
	2	#ifndef _ASM_X86_IOBITMAP_H
	3	#define _ASM_X86_IOBITMAP_H
	4
4804e382	5	#include <linux/refcount.h>
577d5cd7 TG	6	#include <asm/processor.h>
	7
	8	struct io_bitmap {
060aa16f	9	u64 sequence;
4804e382	10	refcount_t refcnt;
577d5cd7 TG	11	/* The maximum number of bytes to copy so all zero bits are covered */
	12	unsigned int max;
	13	unsigned long bitmap[IO_BITMAP_LONGS];
	14	};
	15
4804e382 TG	16	struct task_struct;
4804e382 TG	17
111e7b15	18	#ifdef CONFIG_X86_IOPL_IOPERM
4804e382	19	void io_bitmap_share(struct task_struct *tsk);
ea5f1cd7 TG	20	void io_bitmap_exit(void);
ea5f1cd7 TG	21
22fe5b04	22	void tss_update_io_bitmap(void);
111e7b15 TG	23	#else
	24	static inline void io_bitmap_share(struct task_struct *tsk) { }
	25	static inline void io_bitmap_exit(void) { }
	26	static inline void tss_update_io_bitmap(void) { }
	27	#endif
22fe5b04	28
577d5cd7	29	#endif