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<title>LCOV - skiboot.info - core/trace.c</title>
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<td width="10%" class="headerItem">Current view:</td>
<td width="35%" class="headerValue"><a href="../index.html">top level</a> - <a href="index.html">core</a> - trace.c<span style="font-size: 80%;"> (source / <a href="trace.c.func-sort-c.html">functions</a>)</span></td>
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<td width="15%"></td>
<td width="10%" class="headerCovTableHead">Hit</td>
<td width="10%" class="headerCovTableHead">Total</td>
<td width="15%" class="headerCovTableHead">Coverage</td>
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<td class="headerItem">Test:</td>
<td class="headerValue">skiboot.info</td>
<td></td>
<td class="headerItem">Lines:</td>
<td class="headerCovTableEntry">90</td>
<td class="headerCovTableEntry">126</td>
<td class="headerCovTableEntryLo">71.4 %</td>
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<td class="headerItem">Date:</td>
<td class="headerValue">2022-05-09 20:27:43</td>
<td></td>
<td class="headerItem">Functions:</td>
<td class="headerCovTableEntry">5</td>
<td class="headerCovTableEntry">7</td>
<td class="headerCovTableEntryLo">71.4 %</td>
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<td class="headerCovTableEntry">0</td>
<td class="headerCovTableEntry">0</td>
<td class="headerCovTableEntryHi">-</td>
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<pre class="sourceHeading"> Branch data Line data Source code</pre>
<pre class="source">
<a name="1"><span class="lineNum"> 1 </span> : : // SPDX-License-Identifier: Apache-2.0 OR GPL-2.0-or-later</a>
<a name="2"><span class="lineNum"> 2 </span> : : /*</a>
<a name="3"><span class="lineNum"> 3 </span> : : * Trace various things into in-memory buffers</a>
<a name="4"><span class="lineNum"> 4 </span> : : *</a>
<a name="5"><span class="lineNum"> 5 </span> : : * Copyright 2013-2019 IBM Corp.</a>
<a name="6"><span class="lineNum"> 6 </span> : : */</a>
<a name="7"><span class="lineNum"> 7 </span> : : </a>
<a name="8"><span class="lineNum"> 8 </span> : : #include <trace.h></a>
<a name="9"><span class="lineNum"> 9 </span> : : #include <timebase.h></a>
<a name="10"><span class="lineNum"> 10 </span> : : #include <lock.h></a>
<a name="11"><span class="lineNum"> 11 </span> : : #include <string.h></a>
<a name="12"><span class="lineNum"> 12 </span> : : #include <stdlib.h></a>
<a name="13"><span class="lineNum"> 13 </span> : : #include <inttypes.h></a>
<a name="14"><span class="lineNum"> 14 </span> : : #include <cpu.h></a>
<a name="15"><span class="lineNum"> 15 </span> : : #include <device.h></a>
<a name="16"><span class="lineNum"> 16 </span> : : #include <libfdt.h></a>
<a name="17"><span class="lineNum"> 17 </span> : : #include <processor.h></a>
<a name="18"><span class="lineNum"> 18 </span> : : #include <skiboot.h></a>
<a name="19"><span class="lineNum"> 19 </span> : : #include <opal-api.h></a>
<a name="20"><span class="lineNum"> 20 </span> : : #include <debug_descriptor.h></a>
<a name="21"><span class="lineNum"> 21 </span> : : #include <nvram.h></a>
<a name="22"><span class="lineNum"> 22 </span> : : </a>
<a name="23"><span class="lineNum"> 23 </span> : : #define DEBUG_TRACES</a>
<a name="24"><span class="lineNum"> 24 </span> : : </a>
<a name="25"><span class="lineNum"> 25 </span> : : #define MAX_SIZE sizeof(union trace)</a>
<a name="26"><span class="lineNum"> 26 </span> : : </a>
<a name="27"><span class="lineNum"> 27 </span> : : /* Smaller trace buffer for early booting */</a>
<a name="28"><span class="lineNum"> 28 </span> : : #define BOOT_TBUF_SZ 65536</a>
<a name="29"><span class="lineNum"> 29 </span> : : static struct {</a>
<a name="30"><span class="lineNum"> 30 </span> : : struct trace_info trace_info;</a>
<a name="31"><span class="lineNum"> 31 </span> : : char buf[BOOT_TBUF_SZ + MAX_SIZE];</a>
<a name="32"><span class="lineNum"> 32 </span> : : } boot_tracebuf __section(".data.boot_trace");</a>
<a name="33"><span class="lineNum"> 33 </span> : : </a>
<a name="34"><span class="lineNum"> 34 </span> :<span class="lineNoCov"> 0 : void init_boot_tracebuf(struct cpu_thread *boot_cpu)</span></a>
<a name="35"><span class="lineNum"> 35 </span> : : {</a>
<a name="36"><span class="lineNum"> 36 </span> :<span class="lineNoCov"> 0 : init_lock(&boot_tracebuf.trace_info.lock);</span></a>
<a name="37"><span class="lineNum"> 37 </span> :<span class="lineNoCov"> 0 : boot_tracebuf.trace_info.tb.buf_size = cpu_to_be64(BOOT_TBUF_SZ);</span></a>
<a name="38"><span class="lineNum"> 38 </span> :<span class="lineNoCov"> 0 : boot_tracebuf.trace_info.tb.max_size = cpu_to_be32(MAX_SIZE);</span></a>
<a name="39"><span class="lineNum"> 39 </span> : : </a>
<a name="40"><span class="lineNum"> 40 </span> :<span class="lineNoCov"> 0 : boot_cpu->trace = &boot_tracebuf.trace_info;</span></a>
<a name="41"><span class="lineNum"> 41 </span> :<span class="lineNoCov"> 0 : }</span></a>
<a name="42"><span class="lineNum"> 42 </span> : : </a>
<a name="43"><span class="lineNum"> 43 </span> :<span class="lineCov"> 4 : static size_t tracebuf_extra(void)</span></a>
<a name="44"><span class="lineNum"> 44 </span> : : {</a>
<a name="45"><span class="lineNum"> 45 </span> : : /* We make room for the largest possible record */</a>
<a name="46"><span class="lineNum"> 46 </span> :<span class="lineCov"> 4 : return TBUF_SZ + MAX_SIZE;</span></a>
<a name="47"><span class="lineNum"> 47 </span> : : }</a>
<a name="48"><span class="lineNum"> 48 </span> : : </a>
<a name="49"><span class="lineNum"> 49 </span> : : /* To avoid bloating each entry, repeats are actually specific entries.</a>
<a name="50"><span class="lineNum"> 50 </span> : : * tb->last points to the last (non-repeat) entry. */</a>
<a name="51"><span class="lineNum"> 51 </span> :<span class="lineCov"> 6418120 : static bool handle_repeat(struct tracebuf *tb, const union trace *trace)</span></a>
<a name="52"><span class="lineNum"> 52 </span> : : {</a>
<a name="53"><span class="lineNum"> 53 </span> : : struct trace_hdr *prev;</a>
<a name="54"><span class="lineNum"> 54 </span> : : struct trace_repeat *rpt;</a>
<a name="55"><span class="lineNum"> 55 </span> : : u32 len;</a>
<a name="56"><span class="lineNum"> 56 </span> : : </a>
<a name="57"><span class="lineNum"> 57 </span> :<span class="lineCov"> 6418120 : prev = (void *)tb->buf + be64_to_cpu(tb->last) % be64_to_cpu(tb->buf_size);</span></a>
<a name="58"><span class="lineNum"> 58 </span> : : </a>
<a name="59"><span class="lineNum"> 59 </span> :<span class="lineCov"> 6418120 : if (prev->type != trace->hdr.type</span></a>
<a name="60"><span class="lineNum"> 60 </span> :<span class="lineCov"> 3121740 : || prev->len_div_8 != trace->hdr.len_div_8</span></a>
<a name="61"><span class="lineNum"> 61 </span> :<span class="lineCov"> 3121740 : || prev->cpu != trace->hdr.cpu)</span></a>
<a name="62"><span class="lineNum"> 62 </span> :<span class="lineCov"> 3296380 : return false;</span></a>
<a name="63"><span class="lineNum"> 63 </span> : : </a>
<a name="64"><span class="lineNum"> 64 </span> :<span class="lineCov"> 3121740 : len = prev->len_div_8 << 3;</span></a>
<a name="65"><span class="lineNum"> 65 </span> :<span class="lineCov"> 3121740 : if (memcmp(prev + 1, &trace->hdr + 1, len - sizeof(*prev)) != 0)</span></a>
<a name="66"><span class="lineNum"> 66 </span> :<span class="lineNoCov"> 0 : return false;</span></a>
<a name="67"><span class="lineNum"> 67 </span> : : </a>
<a name="68"><span class="lineNum"> 68 </span> : : /* If they've consumed prev entry, don't repeat. */</a>
<a name="69"><span class="lineNum"> 69 </span> :<span class="lineCov"> 3121740 : if (be64_to_cpu(tb->last) < be64_to_cpu(tb->start))</span></a>
<a name="70"><span class="lineNum"> 70 </span> :<span class="lineNoCov"> 0 : return false;</span></a>
<a name="71"><span class="lineNum"> 71 </span> : : </a>
<a name="72"><span class="lineNum"> 72 </span> : : /* OK, it's a duplicate. Do we already have repeat? */</a>
<a name="73"><span class="lineNum"> 73 </span> :<span class="lineCov"> 3121740 : if (be64_to_cpu(tb->last) + len != be64_to_cpu(tb->end)) {</span></a>
<a name="74"><span class="lineNum"> 74 </span> :<span class="lineCov"> 1985760 : u64 pos = be64_to_cpu(tb->last) + len;</span></a>
<a name="75"><span class="lineNum"> 75 </span> : : /* FIXME: Reader is not protected from seeing this! */</a>
<a name="76"><span class="lineNum"> 76 </span> :<span class="lineCov"> 1985760 : rpt = (void *)tb->buf + pos % be64_to_cpu(tb->buf_size);</span></a>
<a name="77"><span class="lineNum"> 77 </span> :<span class="lineCov"> 1985760 : assert(pos + rpt->len_div_8*8 == be64_to_cpu(tb->end));</span></a>
<a name="78"><span class="lineNum"> 78 </span> :<span class="lineCov"> 1985760 : assert(rpt->type == TRACE_REPEAT);</span></a>
<a name="79"><span class="lineNum"> 79 </span> : : </a>
<a name="80"><span class="lineNum"> 80 </span> : : /* If this repeat entry is full, don't repeat. */</a>
<a name="81"><span class="lineNum"> 81 </span> :<span class="lineCov"> 1985760 : if (be16_to_cpu(rpt->num) == 0xFFFF)</span></a>
<a name="82"><span class="lineNum"> 82 </span> :<span class="lineCov"> 16 : return false;</span></a>
<a name="83"><span class="lineNum"> 83 </span> : : </a>
<a name="84"><span class="lineNum"> 84 </span> :<span class="lineCov"> 1985750 : rpt->num = cpu_to_be16(be16_to_cpu(rpt->num) + 1);</span></a>
<a name="85"><span class="lineNum"> 85 </span> :<span class="lineCov"> 1985750 : rpt->timestamp = trace->hdr.timestamp;</span></a>
<a name="86"><span class="lineNum"> 86 </span> :<span class="lineCov"> 1985750 : return true;</span></a>
<a name="87"><span class="lineNum"> 87 </span> : : }</a>
<a name="88"><span class="lineNum"> 88 </span> : : </a>
<a name="89"><span class="lineNum"> 89 </span> : : /*</a>
<a name="90"><span class="lineNum"> 90 </span> : : * Generate repeat entry: it's the smallest possible entry, so we</a>
<a name="91"><span class="lineNum"> 91 </span> : : * must have eliminated old entries.</a>
<a name="92"><span class="lineNum"> 92 </span> : : */</a>
<a name="93"><span class="lineNum"> 93 </span> :<span class="lineCov"> 1135980 : assert(trace->hdr.len_div_8 * 8 >= sizeof(*rpt));</span></a>
<a name="94"><span class="lineNum"> 94 </span> : : </a>
<a name="95"><span class="lineNum"> 95 </span> :<span class="lineCov"> 1135980 : rpt = (void *)tb->buf + be64_to_cpu(tb->end) % be64_to_cpu(tb->buf_size);</span></a>
<a name="96"><span class="lineNum"> 96 </span> :<span class="lineCov"> 1135980 : rpt->timestamp = trace->hdr.timestamp;</span></a>
<a name="97"><span class="lineNum"> 97 </span> :<span class="lineCov"> 1135980 : rpt->type = TRACE_REPEAT;</span></a>
<a name="98"><span class="lineNum"> 98 </span> :<span class="lineCov"> 1135980 : rpt->len_div_8 = sizeof(*rpt) >> 3;</span></a>
<a name="99"><span class="lineNum"> 99 </span> :<span class="lineCov"> 1135980 : rpt->cpu = trace->hdr.cpu;</span></a>
<a name="100"><span class="lineNum"> 100 </span> :<span class="lineCov"> 1135980 : rpt->prev_len = cpu_to_be16(trace->hdr.len_div_8 << 3);</span></a>
<a name="101"><span class="lineNum"> 101 </span> :<span class="lineCov"> 1135980 : rpt->num = cpu_to_be16(1);</span></a>
<a name="102"><span class="lineNum"> 102 </span> :<span class="lineCov"> 1135980 : lwsync(); /* write barrier: complete repeat record before exposing */</span></a>
<a name="103"><span class="lineNum"> 103 </span> :<span class="lineCov"> 1135980 : tb->end = cpu_to_be64(be64_to_cpu(tb->end) + sizeof(*rpt));</span></a>
<a name="104"><span class="lineNum"> 104 </span> :<span class="lineCov"> 1135980 : return true;</span></a>
<a name="105"><span class="lineNum"> 105 </span> : : }</a>
<a name="106"><span class="lineNum"> 106 </span> : : </a>
<a name="107"><span class="lineNum"> 107 </span> :<span class="lineCov"> 6418120 : void trace_add(union trace *trace, u8 type, u16 len)</span></a>
<a name="108"><span class="lineNum"> 108 </span> : : {</a>
<a name="109"><span class="lineNum"> 109 </span> :<span class="lineCov"> 6418120 : struct trace_info *ti = this_cpu()->trace;</span></a>
<a name="110"><span class="lineNum"> 110 </span> : : unsigned int tsz;</a>
<a name="111"><span class="lineNum"> 111 </span> : : </a>
<a name="112"><span class="lineNum"> 112 </span> :<span class="lineCov"> 6418120 : trace->hdr.type = type;</span></a>
<a name="113"><span class="lineNum"> 113 </span> :<span class="lineCov"> 6418120 : trace->hdr.len_div_8 = (len + 7) >> 3;</span></a>
<a name="114"><span class="lineNum"> 114 </span> : : </a>
<a name="115"><span class="lineNum"> 115 </span> :<span class="lineCov"> 6418120 : tsz = trace->hdr.len_div_8 << 3;</span></a>
<a name="116"><span class="lineNum"> 116 </span> : : </a>
<a name="117"><span class="lineNum"> 117 </span> : : #ifdef DEBUG_TRACES</a>
<a name="118"><span class="lineNum"> 118 </span> :<span class="lineCov"> 6418120 : assert(tsz >= sizeof(trace->hdr));</span></a>
<a name="119"><span class="lineNum"> 119 </span> :<span class="lineCov"> 6418120 : assert(tsz <= sizeof(*trace));</span></a>
<a name="120"><span class="lineNum"> 120 </span> :<span class="lineCov"> 6418120 : assert(trace->hdr.type != TRACE_REPEAT);</span></a>
<a name="121"><span class="lineNum"> 121 </span> :<span class="lineCov"> 6418120 : assert(trace->hdr.type != TRACE_OVERFLOW);</span></a>
<a name="122"><span class="lineNum"> 122 </span> : : #endif</a>
<a name="123"><span class="lineNum"> 123 </span> : : /* Skip traces not enabled in the debug descriptor */</a>
<a name="124"><span class="lineNum"> 124 </span> :<span class="lineCov"> 6418120 : if (trace->hdr.type < (8 * sizeof(debug_descriptor.trace_mask)) &&</span></a>
<a name="125"><span class="lineNum"> 125 </span> :<span class="lineCov"> 3997700 : !((1ul << trace->hdr.type) & be64_to_cpu(debug_descriptor.trace_mask)))</span></a>
<a name="126"><span class="lineNum"> 126 </span> :<span class="lineNoCov"> 0 : return;</span></a>
<a name="127"><span class="lineNum"> 127 </span> : : </a>
<a name="128"><span class="lineNum"> 128 </span> :<span class="lineCov"> 6418120 : trace->hdr.timestamp = cpu_to_be64(mftb());</span></a>
<a name="129"><span class="lineNum"> 129 </span> :<span class="lineCov"> 6418120 : trace->hdr.cpu = cpu_to_be16(this_cpu()->server_no);</span></a>
<a name="130"><span class="lineNum"> 130 </span> : : </a>
<a name="131"><span class="lineNum"> 131 </span> :<span class="lineCov"> 6418120 : lock(&ti->lock);</span></a>
<a name="132"><span class="lineNum"> 132 </span> : : </a>
<a name="133"><span class="lineNum"> 133 </span> : : /* Throw away old entries before we overwrite them. */</a>
<a name="134"><span class="lineNum"> 134 </span> :<span class="lineCov"> 10572500 : while ((be64_to_cpu(ti->tb.start) + be64_to_cpu(ti->tb.buf_size))</span></a>
<a name="135"><span class="lineNum"> 135 </span> :<span class="lineCov"> 10572500 : < (be64_to_cpu(ti->tb.end) + tsz)) {</span></a>
<a name="136"><span class="lineNum"> 136 </span> : : struct trace_hdr *hdr;</a>
<a name="137"><span class="lineNum"> 137 </span> : : </a>
<a name="138"><span class="lineNum"> 138 </span> :<span class="lineCov"> 8308770 : hdr = (void *)ti->tb.buf +</span></a>
<a name="139"><span class="lineNum"> 139 </span> :<span class="lineCov"> 4154380 : be64_to_cpu(ti->tb.start) % be64_to_cpu(ti->tb.buf_size);</span></a>
<a name="140"><span class="lineNum"> 140 </span> :<span class="lineCov"> 8308770 : ti->tb.start = cpu_to_be64(be64_to_cpu(ti->tb.start) +</span></a>
<a name="141"><span class="lineNum"> 141 </span> :<span class="lineCov"> 4154380 : (hdr->len_div_8 << 3));</span></a>
<a name="142"><span class="lineNum"> 142 </span> : : }</a>
<a name="143"><span class="lineNum"> 143 </span> : : </a>
<a name="144"><span class="lineNum"> 144 </span> : : /* Must update ->start before we rewrite new entries. */</a>
<a name="145"><span class="lineNum"> 145 </span> :<span class="lineCov"> 6418120 : lwsync(); /* write barrier */</span></a>
<a name="146"><span class="lineNum"> 146 </span> : : </a>
<a name="147"><span class="lineNum"> 147 </span> : : /* Check for duplicates... */</a>
<a name="148"><span class="lineNum"> 148 </span> :<span class="lineCov"> 6418120 : if (!handle_repeat(&ti->tb, trace)) {</span></a>
<a name="149"><span class="lineNum"> 149 </span> : : /* This may go off end, and that's why ti->tb.buf is oversize */</a>
<a name="150"><span class="lineNum"> 150 </span> :<span class="lineCov"> 3296390 : memcpy(ti->tb.buf + be64_to_cpu(ti->tb.end) % be64_to_cpu(ti->tb.buf_size),</span></a>
<a name="151"><span class="lineNum"> 151 </span> : : trace, tsz);</a>
<a name="152"><span class="lineNum"> 152 </span> :<span class="lineCov"> 3296390 : ti->tb.last = ti->tb.end;</span></a>
<a name="153"><span class="lineNum"> 153 </span> :<span class="lineCov"> 3296390 : lwsync(); /* write barrier: write entry before exposing */</span></a>
<a name="154"><span class="lineNum"> 154 </span> :<span class="lineCov"> 3296390 : ti->tb.end = cpu_to_be64(be64_to_cpu(ti->tb.end) + tsz);</span></a>
<a name="155"><span class="lineNum"> 155 </span> : : }</a>
<a name="156"><span class="lineNum"> 156 </span> :<span class="lineCov"> 6418120 : unlock(&ti->lock);</span></a>
<a name="157"><span class="lineNum"> 157 </span> : : }</a>
<a name="158"><span class="lineNum"> 158 </span> : : </a>
<a name="159"><span class="lineNum"> 159 </span> :<span class="lineNoCov"> 0 : void trace_add_dt_props(void)</span></a>
<a name="160"><span class="lineNum"> 160 </span> : : {</a>
<a name="161"><span class="lineNum"> 161 </span> :<span class="lineNoCov"> 0 : uint64_t boot_buf_phys = (uint64_t) &boot_tracebuf.trace_info;</span></a>
<a name="162"><span class="lineNum"> 162 </span> : : struct dt_node *exports, *traces;</a>
<a name="163"><span class="lineNum"> 163 </span> : : unsigned int i;</a>
<a name="164"><span class="lineNum"> 164 </span> : : fdt64_t *prop;</a>
<a name="165"><span class="lineNum"> 165 </span> : : u64 tmask;</a>
<a name="166"><span class="lineNum"> 166 </span> : : char tname[256];</a>
<a name="167"><span class="lineNum"> 167 </span> : : </a>
<a name="168"><span class="lineNum"> 168 </span> :<span class="lineNoCov"> 0 : exports = dt_find_by_path(opal_node, "firmware/exports");</span></a>
<a name="169"><span class="lineNum"> 169 </span> :<span class="lineNoCov"> 0 : if (!exports)</span></a>
<a name="170"><span class="lineNum"> 170 </span> :<span class="lineNoCov"> 0 : return;</span></a>
<a name="171"><span class="lineNum"> 171 </span> : : </a>
<a name="172"><span class="lineNum"> 172 </span> : : /*</a>
<a name="173"><span class="lineNum"> 173 </span> : : * nvram hack to put all the trace buffer exports in the exports</a>
<a name="174"><span class="lineNum"> 174 </span> : : * node. This is useful if the kernel doesn't also export subnodes.</a>
<a name="175"><span class="lineNum"> 175 </span> : : */</a>
<a name="176"><span class="lineNum"> 176 </span> :<span class="lineNoCov"> 0 : if (nvram_query_safe("flat-trace-buf"))</span></a>
<a name="177"><span class="lineNum"> 177 </span> :<span class="lineNoCov"> 0 : traces = exports;</span></a>
<a name="178"><span class="lineNum"> 178 </span> : : else</a>
<a name="179"><span class="lineNum"> 179 </span> :<span class="lineNoCov"> 0 : traces = dt_new(exports, "traces");</span></a>
<a name="180"><span class="lineNum"> 180 </span> : : </a>
<a name="181"><span class="lineNum"> 181 </span> :<span class="lineNoCov"> 0 : prop = malloc(sizeof(u64) * 2 * be32_to_cpu(debug_descriptor.num_traces));</span></a>
<a name="182"><span class="lineNum"> 182 </span> : : </a>
<a name="183"><span class="lineNum"> 183 </span> :<span class="lineNoCov"> 0 : for (i = 0; i < be32_to_cpu(debug_descriptor.num_traces); i++) {</span></a>
<a name="184"><span class="lineNum"> 184 </span> :<span class="lineNoCov"> 0 : uint64_t addr = be64_to_cpu(debug_descriptor.trace_phys[i]);</span></a>
<a name="185"><span class="lineNum"> 185 </span> :<span class="lineNoCov"> 0 : uint64_t size = be32_to_cpu(debug_descriptor.trace_size[i]);</span></a>
<a name="186"><span class="lineNum"> 186 </span> :<span class="lineNoCov"> 0 : uint32_t pir = be16_to_cpu(debug_descriptor.trace_pir[i]);</span></a>
<a name="187"><span class="lineNum"> 187 </span> : : </a>
<a name="188"><span class="lineNum"> 188 </span> :<span class="lineNoCov"> 0 : prop[i * 2] = cpu_to_fdt64(addr);</span></a>
<a name="189"><span class="lineNum"> 189 </span> :<span class="lineNoCov"> 0 : prop[i * 2 + 1] = cpu_to_fdt64(size);</span></a>
<a name="190"><span class="lineNum"> 190 </span> : : </a>
<a name="191"><span class="lineNum"> 191 </span> :<span class="lineNoCov"> 0 : if (addr == boot_buf_phys)</span></a>
<a name="192"><span class="lineNum"> 192 </span> :<span class="lineNoCov"> 0 : snprintf(tname, sizeof(tname), "boot-%x", pir);</span></a>
<a name="193"><span class="lineNum"> 193 </span> : : else</a>
<a name="194"><span class="lineNum"> 194 </span> :<span class="lineNoCov"> 0 : snprintf(tname, sizeof(tname), "trace-%x", pir);</span></a>
<a name="195"><span class="lineNum"> 195 </span> : : </a>
<a name="196"><span class="lineNum"> 196 </span> :<span class="lineNoCov"> 0 : dt_add_property_u64s(traces, tname, addr, size);</span></a>
<a name="197"><span class="lineNum"> 197 </span> : : }</a>
<a name="198"><span class="lineNum"> 198 </span> : : </a>
<a name="199"><span class="lineNum"> 199 </span> :<span class="lineNoCov"> 0 : dt_add_property(opal_node, "ibm,opal-traces",</span></a>
<a name="200"><span class="lineNum"> 200 </span> : : prop, sizeof(u64) * 2 * i);</a>
<a name="201"><span class="lineNum"> 201 </span> :<span class="lineNoCov"> 0 : free(prop);</span></a>
<a name="202"><span class="lineNum"> 202 </span> : : </a>
<a name="203"><span class="lineNum"> 203 </span> :<span class="lineNoCov"> 0 : tmask = (uint64_t)&debug_descriptor.trace_mask;</span></a>
<a name="204"><span class="lineNum"> 204 </span> :<span class="lineNoCov"> 0 : dt_add_property_u64(opal_node, "ibm,opal-trace-mask", tmask);</span></a>
<a name="205"><span class="lineNum"> 205 </span> : : }</a>
<a name="206"><span class="lineNum"> 206 </span> : : </a>
<a name="207"><span class="lineNum"> 207 </span> :<span class="lineCov"> 3 : static void trace_add_desc(struct trace_info *t, uint64_t size, uint16_t pir)</span></a>
<a name="208"><span class="lineNum"> 208 </span> : : {</a>
<a name="209"><span class="lineNum"> 209 </span> :<span class="lineCov"> 3 : unsigned int i = be32_to_cpu(debug_descriptor.num_traces);</span></a>
<a name="210"><span class="lineNum"> 210 </span> : : </a>
<a name="211"><span class="lineNum"> 211 </span> :<span class="lineCov"> 3 : if (i >= DEBUG_DESC_MAX_TRACES) {</span></a>
<a name="212"><span class="lineNum"> 212 </span> :<span class="lineNoCov"> 0 : prerror("TRACE: Debug descriptor trace list full !\n");</span></a>
<a name="213"><span class="lineNum"> 213 </span> :<span class="lineNoCov"> 0 : return;</span></a>
<a name="214"><span class="lineNum"> 214 </span> : : }</a>
<a name="215"><span class="lineNum"> 215 </span> : : </a>
<a name="216"><span class="lineNum"> 216 </span> :<span class="lineCov"> 3 : debug_descriptor.num_traces = cpu_to_be32(i + 1);</span></a>
<a name="217"><span class="lineNum"> 217 </span> :<span class="lineCov"> 3 : debug_descriptor.trace_phys[i] = cpu_to_be64((uint64_t)t);</span></a>
<a name="218"><span class="lineNum"> 218 </span> :<span class="lineCov"> 3 : debug_descriptor.trace_tce[i] = 0; /* populated later */</span></a>
<a name="219"><span class="lineNum"> 219 </span> :<span class="lineCov"> 3 : debug_descriptor.trace_size[i] = cpu_to_be32(size);</span></a>
<a name="220"><span class="lineNum"> 220 </span> :<span class="lineCov"> 3 : debug_descriptor.trace_pir[i] = cpu_to_be16(pir);</span></a>
<a name="221"><span class="lineNum"> 221 </span> : : }</a>
<a name="222"><span class="lineNum"> 222 </span> : : </a>
<a name="223"><span class="lineNum"> 223 </span> : : /* Allocate trace buffers once we know memory topology */</a>
<a name="224"><span class="lineNum"> 224 </span> :<span class="lineCov"> 1 : void init_trace_buffers(void)</span></a>
<a name="225"><span class="lineNum"> 225 </span> : : {</a>
<a name="226"><span class="lineNum"> 226 </span> : : struct cpu_thread *t;</a>
<a name="227"><span class="lineNum"> 227 </span> :<span class="lineCov"> 1 : struct trace_info *any = &boot_tracebuf.trace_info;</span></a>
<a name="228"><span class="lineNum"> 228 </span> : : uint64_t size;</a>
<a name="229"><span class="lineNum"> 229 </span> : : </a>
<a name="230"><span class="lineNum"> 230 </span> : : /* Boot the boot trace in the debug descriptor */</a>
<a name="231"><span class="lineNum"> 231 </span> :<span class="lineCov"> 1 : trace_add_desc(any, sizeof(boot_tracebuf), this_cpu()->pir);</span></a>
<a name="232"><span class="lineNum"> 232 </span> : : </a>
<a name="233"><span class="lineNum"> 233 </span> : : /* Allocate a trace buffer for each primary cpu. */</a>
<a name="234"><span class="lineNum"> 234 </span> :<span class="lineCov"> 5 : for_each_cpu(t) {</span></a>
<a name="235"><span class="lineNum"> 235 </span> :<span class="lineCov"> 4 : if (t->is_secondary)</span></a>
<a name="236"><span class="lineNum"> 236 </span> :<span class="lineCov"> 2 : continue;</span></a>
<a name="237"><span class="lineNum"> 237 </span> : : </a>
<a name="238"><span class="lineNum"> 238 </span> : : /* Use a 64K alignment for TCE mapping */</a>
<a name="239"><span class="lineNum"> 239 </span> :<span class="lineCov"> 2 : size = ALIGN_UP(sizeof(*t->trace) + tracebuf_extra(), 0x10000);</span></a>
<a name="240"><span class="lineNum"> 240 </span> :<span class="lineCov"> 2 : t->trace = local_alloc(t->chip_id, size, 0x10000);</span></a>
<a name="241"><span class="lineNum"> 241 </span> :<span class="lineCov"> 2 : if (t->trace) {</span></a>
<a name="242"><span class="lineNum"> 242 </span> :<span class="lineCov"> 2 : any = t->trace;</span></a>
<a name="243"><span class="lineNum"> 243 </span> :<span class="lineCov"> 2 : memset(t->trace, 0, size);</span></a>
<a name="244"><span class="lineNum"> 244 </span> :<span class="lineCov"> 2 : init_lock(&t->trace->lock);</span></a>
<a name="245"><span class="lineNum"> 245 </span> :<span class="lineCov"> 2 : t->trace->tb.max_size = cpu_to_be32(MAX_SIZE);</span></a>
<a name="246"><span class="lineNum"> 246 </span> :<span class="lineCov"> 2 : t->trace->tb.buf_size = cpu_to_be64(TBUF_SZ);</span></a>
<a name="247"><span class="lineNum"> 247 </span> :<span class="lineCov"> 2 : trace_add_desc(any, sizeof(t->trace->tb) +</span></a>
<a name="248"><span class="lineNum"> 248 </span> :<span class="lineCov"> 2 : tracebuf_extra(), t->pir);</span></a>
<a name="249"><span class="lineNum"> 249 </span> : : } else</a>
<a name="250"><span class="lineNum"> 250 </span> :<span class="lineNoCov"> 0 : prerror("TRACE: cpu 0x%x allocation failed\n", t->pir);</span></a>
<a name="251"><span class="lineNum"> 251 </span> : : }</a>
<a name="252"><span class="lineNum"> 252 </span> : : </a>
<a name="253"><span class="lineNum"> 253 </span> : : /* In case any allocations failed, share trace buffers. */</a>
<a name="254"><span class="lineNum"> 254 </span> :<span class="lineCov"> 5 : for_each_cpu(t) {</span></a>
<a name="255"><span class="lineNum"> 255 </span> :<span class="lineCov"> 4 : if (!t->is_secondary && !t->trace)</span></a>
<a name="256"><span class="lineNum"> 256 </span> :<span class="lineNoCov"> 0 : t->trace = any;</span></a>
<a name="257"><span class="lineNum"> 257 </span> : : }</a>
<a name="258"><span class="lineNum"> 258 </span> : : </a>
<a name="259"><span class="lineNum"> 259 </span> : : /* And copy those to the secondaries. */</a>
<a name="260"><span class="lineNum"> 260 </span> :<span class="lineCov"> 5 : for_each_cpu(t) {</span></a>
<a name="261"><span class="lineNum"> 261 </span> :<span class="lineCov"> 4 : if (!t->is_secondary)</span></a>
<a name="262"><span class="lineNum"> 262 </span> :<span class="lineCov"> 2 : continue;</span></a>
<a name="263"><span class="lineNum"> 263 </span> :<span class="lineCov"> 2 : t->trace = t->primary->trace;</span></a>
<a name="264"><span class="lineNum"> 264 </span> : : }</a>
<a name="265"><span class="lineNum"> 265 </span> :<span class="lineCov"> 1 : }</span></a>
</pre>
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