cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
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part_stat.h (2434B)

      1/* SPDX-License-Identifier: GPL-2.0 */
      2#ifndef _LINUX_PART_STAT_H
      3#define _LINUX_PART_STAT_H
      4
      5#include <linux/blkdev.h>
      6#include <asm/local.h>
      7
      8struct disk_stats {
      9	u64 nsecs[NR_STAT_GROUPS];
     10	unsigned long sectors[NR_STAT_GROUPS];
     11	unsigned long ios[NR_STAT_GROUPS];
     12	unsigned long merges[NR_STAT_GROUPS];
     13	unsigned long io_ticks;
     14	local_t in_flight[2];
     15};
     16
     17/*
     18 * Macros to operate on percpu disk statistics:
     19 *
     20 * {disk|part|all}_stat_{add|sub|inc|dec}() modify the stat counters and should
     21 * be called between disk_stat_lock() and disk_stat_unlock().
     22 *
     23 * part_stat_read() can be called at any time.
     24 */
     25#define part_stat_lock()	preempt_disable()
     26#define part_stat_unlock()	preempt_enable()
     27
     28#define part_stat_get_cpu(part, field, cpu)				\
     29	(per_cpu_ptr((part)->bd_stats, (cpu))->field)
     30
     31#define part_stat_get(part, field)					\
     32	part_stat_get_cpu(part, field, smp_processor_id())
     33
     34#define part_stat_read(part, field)					\
     35({									\
     36	typeof((part)->bd_stats->field) res = 0;			\
     37	unsigned int _cpu;						\
     38	for_each_possible_cpu(_cpu)					\
     39		res += per_cpu_ptr((part)->bd_stats, _cpu)->field; \
     40	res;								\
     41})
     42
     43static inline void part_stat_set_all(struct block_device *part, int value)
     44{
     45	int i;
     46
     47	for_each_possible_cpu(i)
     48		memset(per_cpu_ptr(part->bd_stats, i), value,
     49				sizeof(struct disk_stats));
     50}
     51
     52#define part_stat_read_accum(part, field)				\
     53	(part_stat_read(part, field[STAT_READ]) +			\
     54	 part_stat_read(part, field[STAT_WRITE]) +			\
     55	 part_stat_read(part, field[STAT_DISCARD]))
     56
     57#define __part_stat_add(part, field, addnd)				\
     58	__this_cpu_add((part)->bd_stats->field, addnd)
     59
     60#define part_stat_add(part, field, addnd)	do {			\
     61	__part_stat_add((part), field, addnd);				\
     62	if ((part)->bd_partno)						\
     63		__part_stat_add(bdev_whole(part), field, addnd);	\
     64} while (0)
     65
     66#define part_stat_dec(part, field)					\
     67	part_stat_add(part, field, -1)
     68#define part_stat_inc(part, field)					\
     69	part_stat_add(part, field, 1)
     70#define part_stat_sub(part, field, subnd)				\
     71	part_stat_add(part, field, -subnd)
     72
     73#define part_stat_local_dec(part, field)				\
     74	local_dec(&(part_stat_get(part, field)))
     75#define part_stat_local_inc(part, field)				\
     76	local_inc(&(part_stat_get(part, field)))
     77#define part_stat_local_read(part, field)				\
     78	local_read(&(part_stat_get(part, field)))
     79#define part_stat_local_read_cpu(part, field, cpu)			\
     80	local_read(&(part_stat_get_cpu(part, field, cpu)))
     81
     82#endif /* _LINUX_PART_STAT_H */