arch/powerpc/include/asm/dtl.h

   1 #ifndef _ASM_POWERPC_DTL_H
   2 #define _ASM_POWERPC_DTL_H
   3
   4 #include <linux/rwsem.h>
   5 #include <asm/lppaca.h>
   6
   7 /*
   8  * Layout of entries in the hypervisor's dispatch trace log buffer.
   9  */
  10 struct dtl_entry {
  11         u8      dispatch_reason;
  12         u8      preempt_reason;
  13         __be16  processor_id;
  14         __be32  enqueue_to_dispatch_time;
  15         __be32  ready_to_enqueue_time;
  16         __be32  waiting_to_ready_time;
  17         __be64  timebase;
  18         __be64  fault_addr;
  19         __be64  srr0;
  20         __be64  srr1;
  21 };
  22
  23 #define DISPATCH_LOG_BYTES      4096    /* bytes per cpu */
  24 #define N_DISPATCH_LOG          (DISPATCH_LOG_BYTES / sizeof(struct dtl_entry))
  25
  26 /*
  27  * Dispatch trace log event enable mask:
  28  *   0x1: voluntary virtual processor waits
  29  *   0x2: time-slice preempts
  30  *   0x4: virtual partition memory page faults
  31  */
  32 #define DTL_LOG_CEDE            0x1
  33 #define DTL_LOG_PREEMPT         0x2
  34 #define DTL_LOG_FAULT           0x4
  35 #define DTL_LOG_ALL             (DTL_LOG_CEDE | DTL_LOG_PREEMPT | DTL_LOG_FAULT)
  36
  37 extern struct kmem_cache *dtl_cache;
  38 extern struct rw_semaphore dtl_access_lock;
  39
  40 extern void register_dtl_buffer(int cpu);
  41 extern void alloc_dtl_buffers(unsigned long *time_limit);
  42
  43 #endif /* _ASM_POWERPC_DTL_H */