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Oliver O'Halloran
a382d1638a
Previously we put all the trace buffer exports in the exports/ node. However, there's one trace buffer for each core so I moved them into a subdirectory since they were crowding up the place. Most kernels don't support recursively exporting subnodes though so kernel's don't have support for recursively exporting subnodes, so add a hack to restore the old behaviour for now. Signed-off-by: Oliver O'Halloran <oohall@gmail.com> [Fixed run-trace test case - Vasant] Signed-off-by: Vasant Hegde <hegdevasant@linux.vnet.ibm.com>
36 lines
894 B
C
36 lines
894 B
C
// SPDX-License-Identifier: Apache-2.0 OR GPL-2.0-or-later
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/* Copyright 2013-2019 IBM Corp. */
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#ifndef __TRACE_H
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#define __TRACE_H
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#include <ccan/short_types/short_types.h>
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#include <stddef.h>
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#include <lock.h>
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#include <trace_types.h>
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struct cpu_thread;
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/* Here's one we prepared earlier. */
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void init_boot_tracebuf(struct cpu_thread *boot_cpu);
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struct trace_info {
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/* Lock for writers. Exposed to kernel. */
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struct lock lock;
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/* Exposed to kernel. */
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struct tracebuf tb;
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};
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#define TBUF_SZ ((1024 * 1024) - sizeof(struct trace_info) - sizeof(union trace))
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/* Allocate trace buffers once we know memory topology */
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void init_trace_buffers(void);
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void trace_add_dt_props(void);
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/* This will fill in timestamp and cpu; you must do type and len. */
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void trace_add(union trace *trace, u8 type, u16 len);
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/* Put trace node into dt. */
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void trace_add_node(void);
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#endif /* __TRACE_H */
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