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memblock: Add flags and nid info in memblock debugfs
Currently, the memblock debugfs can display the count of memblock_type and the base and end of the reg. However, when memblock_mark_*() or memblock_set_node() is executed on some range, the information in the existing debugfs cannot make it clear why the address is not consecutive. For example, cat /sys/kernel/debug/memblock/memory 0: 0x0000000080000000..0x00000000901fffff 1: 0x0000000090200000..0x00000000905fffff 2: 0x0000000090600000..0x0000000092ffffff 3: 0x0000000093000000..0x00000000973fffff 4: 0x0000000097400000..0x00000000b71fffff 5: 0x00000000c0000000..0x00000000dfffffff 6: 0x00000000e2500000..0x00000000f87fffff 7: 0x00000000f8800000..0x00000000fa7fffff 8: 0x00000000fa800000..0x00000000fd3effff 9: 0x00000000fd3f0000..0x00000000fd3fefff 10: 0x00000000fd3ff000..0x00000000fd7fffff 11: 0x00000000fd800000..0x00000000fd901fff 12: 0x00000000fd902000..0x00000000fd909fff 13: 0x00000000fd90a000..0x00000000fd90bfff 14: 0x00000000fd90c000..0x00000000ffffffff 15: 0x0000000880000000..0x0000000affffffff So we can add flags and nid to this debugfs. For example, cat /sys/kernel/debug/memblock/memory 0: 0x0000000080000000..0x00000000901fffff 0 NONE 1: 0x0000000090200000..0x00000000905fffff 0 NOMAP 2: 0x0000000090600000..0x0000000092ffffff 0 NONE 3: 0x0000000093000000..0x00000000973fffff 0 NOMAP 4: 0x0000000097400000..0x00000000b71fffff 0 NONE 5: 0x00000000c0000000..0x00000000dfffffff 0 NONE 6: 0x00000000e2500000..0x00000000f87fffff 0 NONE 7: 0x00000000f8800000..0x00000000fa7fffff 0 NOMAP 8: 0x00000000fa800000..0x00000000fd3effff 0 NONE 9: 0x00000000fd3f0000..0x00000000fd3fefff 0 NOMAP 10: 0x00000000fd3ff000..0x00000000fd7fffff 0 NONE 11: 0x00000000fd800000..0x00000000fd901fff 0 NOMAP 12: 0x00000000fd902000..0x00000000fd909fff 0 NONE 13: 0x00000000fd90a000..0x00000000fd90bfff 0 NOMAP 14: 0x00000000fd90c000..0x00000000ffffffff 0 NONE 15: 0x0000000880000000..0x0000000affffffff 0 NONE Signed-off-by: Yuwei Guan <ssawgyw@gmail.com> Reviewed-by: Anshuman Khandual <anshuman.khandual@arm.com> Reviewed-by: Kefeng Wang <wangkefeng.wang@huawei.com> Link: https://lore.kernel.org/r/20230519105321.333-1-ssawgyw@gmail.com Signed-off-by: Mike Rapoport (IBM) <rppt@kernel.org>
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@ -2158,12 +2158,19 @@ void __init memblock_free_all(void)
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}
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#if defined(CONFIG_DEBUG_FS) && defined(CONFIG_ARCH_KEEP_MEMBLOCK)
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static const char * const flagname[] = {
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[ilog2(MEMBLOCK_HOTPLUG)] = "HOTPLUG",
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[ilog2(MEMBLOCK_MIRROR)] = "MIRROR",
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[ilog2(MEMBLOCK_NOMAP)] = "NOMAP",
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[ilog2(MEMBLOCK_DRIVER_MANAGED)] = "DRV_MNG",
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};
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static int memblock_debug_show(struct seq_file *m, void *private)
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{
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struct memblock_type *type = m->private;
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struct memblock_region *reg;
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int i;
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int i, j;
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unsigned int count = ARRAY_SIZE(flagname);
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phys_addr_t end;
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for (i = 0; i < type->cnt; i++) {
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@ -2171,7 +2178,20 @@ static int memblock_debug_show(struct seq_file *m, void *private)
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end = reg->base + reg->size - 1;
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seq_printf(m, "%4d: ", i);
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seq_printf(m, "%pa..%pa\n", ®->base, &end);
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seq_printf(m, "%pa..%pa ", ®->base, &end);
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seq_printf(m, "%4d ", memblock_get_region_node(reg));
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if (reg->flags) {
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for (j = 0; j < count; j++) {
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if (reg->flags & (1U << j)) {
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seq_printf(m, "%s\n", flagname[j]);
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break;
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}
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}
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if (j == count)
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seq_printf(m, "%s\n", "UNKNOWN");
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} else {
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seq_printf(m, "%s\n", "NONE");
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}
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}
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return 0;
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}
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