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 */
10struct 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
37extern struct kmem_cache *dtl_cache;
38extern struct rw_semaphore dtl_access_lock;
39
40extern void register_dtl_buffer(int cpu);
41extern void alloc_dtl_buffers(unsigned long *time_limit);
42
43#endif /* _ASM_POWERPC_DTL_H */