6ba5aa541a
dtl is the PAPR Dispatch Trace Log, which is entirely a pseries feature. The pseries platform alrady has a file dealing with the dtl, so move scanning for stolen time accounting there from kernel/time.c. Signed-off-by: Nicholas Piggin <npiggin@gmail.com> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Link: https://lore.kernel.org/r/20220902085316.2071519-5-npiggin@gmail.com
45 lines
1.1 KiB
C
45 lines
1.1 KiB
C
#ifndef _ASM_POWERPC_DTL_H
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#define _ASM_POWERPC_DTL_H
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#include <asm/lppaca.h>
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#include <linux/spinlock_types.h>
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/*
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* Layout of entries in the hypervisor's dispatch trace log buffer.
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*/
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struct dtl_entry {
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u8 dispatch_reason;
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u8 preempt_reason;
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__be16 processor_id;
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__be32 enqueue_to_dispatch_time;
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__be32 ready_to_enqueue_time;
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__be32 waiting_to_ready_time;
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__be64 timebase;
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__be64 fault_addr;
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__be64 srr0;
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__be64 srr1;
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};
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#define DISPATCH_LOG_BYTES 4096 /* bytes per cpu */
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#define N_DISPATCH_LOG (DISPATCH_LOG_BYTES / sizeof(struct dtl_entry))
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/*
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* Dispatch trace log event enable mask:
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* 0x1: voluntary virtual processor waits
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* 0x2: time-slice preempts
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* 0x4: virtual partition memory page faults
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*/
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#define DTL_LOG_CEDE 0x1
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#define DTL_LOG_PREEMPT 0x2
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#define DTL_LOG_FAULT 0x4
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#define DTL_LOG_ALL (DTL_LOG_CEDE | DTL_LOG_PREEMPT | DTL_LOG_FAULT)
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extern struct kmem_cache *dtl_cache;
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extern rwlock_t dtl_access_lock;
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extern void register_dtl_buffer(int cpu);
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extern void alloc_dtl_buffers(unsigned long *time_limit);
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extern long hcall_vphn(unsigned long cpu, u64 flags, __be32 *associativity);
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#endif /* _ASM_POWERPC_DTL_H */
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