1 #ifndef _ASM_POWERPC_DTL_H
2 #define _ASM_POWERPC_DTL_H
3
4 #include <asm/lppaca.h>
5 #include <linux/spinlock_types.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 rwlock_t 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 */
44
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