tools/perf/util/cacheline.h

   1 /* SPDX-License-Identifier: GPL-2.0 */
   2 #ifndef PERF_CACHELINE_H
   3 #define PERF_CACHELINE_H
   4
   5 #include <linux/compiler.h>
   6
   7 int __pure cacheline_size(void);
   8
   9
  10 /*
  11  * Some architectures have 'Adjacent Cacheline Prefetch' feature,
  12  * which performs like the cacheline size being doubled.
  13  */
  14 static inline u64 cl_address(u64 address, bool double_cl)
  15 {
  16         u64 size = cacheline_size();
  17
  18         if (double_cl)
  19                 size *= 2;
  20
  21         /* return the cacheline of the address */
  22         return (address & ~(size - 1));
  23 }
  24
  25 static inline u64 cl_offset(u64 address, bool double_cl)
  26 {
  27         u64 size = cacheline_size();
  28
  29         if (double_cl)
  30                 size *= 2;
  31
  32         /* return the offset inside cacheline */
  33         return (address & (size - 1));
  34 }
  35
  36 #endif // PERF_CACHELINE_H