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linux/arch/powerpc/include/asm/dtl.h
Michael Ellerman 9a6c05fe9a powerpc/pseries: Move hcall_vphn() prototype into vphn.h
Consolidate the two prototypes for hcall_vphn() into vphn.h.

Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://msgid.link/20230823055317.751786-2-mpe@ellerman.id.au
2023-08-24 22:33:16 +10:00

44 lines
1.1 KiB
C

#ifndef _ASM_POWERPC_DTL_H
#define _ASM_POWERPC_DTL_H
#include <asm/lppaca.h>
#include <linux/spinlock_types.h>
/*
* Layout of entries in the hypervisor's dispatch trace log buffer.
*/
struct dtl_entry {
u8 dispatch_reason;
u8 preempt_reason;
__be16 processor_id;
__be32 enqueue_to_dispatch_time;
__be32 ready_to_enqueue_time;
__be32 waiting_to_ready_time;
__be64 timebase;
__be64 fault_addr;
__be64 srr0;
__be64 srr1;
};
#define DISPATCH_LOG_BYTES 4096 /* bytes per cpu */
#define N_DISPATCH_LOG (DISPATCH_LOG_BYTES / sizeof(struct dtl_entry))
/*
* Dispatch trace log event enable mask:
* 0x1: voluntary virtual processor waits
* 0x2: time-slice preempts
* 0x4: virtual partition memory page faults
*/
#define DTL_LOG_CEDE 0x1
#define DTL_LOG_PREEMPT 0x2
#define DTL_LOG_FAULT 0x4
#define DTL_LOG_ALL (DTL_LOG_CEDE | DTL_LOG_PREEMPT | DTL_LOG_FAULT)
extern struct kmem_cache *dtl_cache;
extern rwlock_t dtl_access_lock;
extern void register_dtl_buffer(int cpu);
extern void alloc_dtl_buffers(unsigned long *time_limit);
#endif /* _ASM_POWERPC_DTL_H */