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 /* 41 * When CONFIG_VIRT_CPU_ACCOUNTING_NATIVE = y, the cpu accounting code controls 42 * reading from the dispatch trace log. If other code wants to consume 43 * DTL entries, it can set this pointer to a function that will get 44 * called once for each DTL entry that gets processed. 45 */ 46 extern void (*dtl_consumer)(struct dtl_entry *entry, u64 index); 47 48 extern void register_dtl_buffer(int cpu); 49 extern void alloc_dtl_buffers(unsigned long *time_limit); 50 extern long hcall_vphn(unsigned long cpu, u64 flags, __be32 *associativity); 51 52 #endif /* _ASM_POWERPC_DTL_H */ 53