s390/mm,ptdump: make page table dumping seq_file optional
s390 version of ae5d1cf358
("arm64: dump: Make the page table
dumping seq_file optional").
Tested-by: Vasily Gorbik <gor@linux.ibm.com>
Signed-off-by: Heiko Carstens <hca@linux.ibm.com>
Signed-off-by: Vasily Gorbik <gor@linux.ibm.com>
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parent
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@ -51,18 +51,34 @@ struct pg_state {
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const struct addr_marker *marker;
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};
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#define pt_dump_seq_printf(m, fmt, args...) \
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({ \
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struct seq_file *__m = (m); \
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\
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if (__m) \
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seq_printf(__m, fmt, ##args); \
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})
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#define pt_dump_seq_puts(m, fmt) \
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({ \
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struct seq_file *__m = (m); \
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\
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if (__m) \
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seq_printf(__m, fmt); \
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})
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static void print_prot(struct seq_file *m, unsigned int pr, int level)
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{
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static const char * const level_name[] =
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{ "ASCE", "PGD", "PUD", "PMD", "PTE" };
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seq_printf(m, "%s ", level_name[level]);
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pt_dump_seq_printf(m, "%s ", level_name[level]);
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if (pr & _PAGE_INVALID) {
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seq_printf(m, "I\n");
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pt_dump_seq_printf(m, "I\n");
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return;
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}
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seq_puts(m, (pr & _PAGE_PROTECT) ? "RO " : "RW ");
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seq_puts(m, (pr & _PAGE_NOEXEC) ? "NX\n" : "X\n");
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pt_dump_seq_puts(m, (pr & _PAGE_PROTECT) ? "RO " : "RW ");
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pt_dump_seq_puts(m, (pr & _PAGE_NOEXEC) ? "NX\n" : "X\n");
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}
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static void note_page(struct ptdump_state *pt_st, unsigned long addr, int level, u64 val)
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@ -87,25 +103,25 @@ static void note_page(struct ptdump_state *pt_st, unsigned long addr, int level,
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if (level == -1)
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addr = max_addr;
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if (st->level == -1) {
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seq_printf(m, "---[ %s ]---\n", st->marker->name);
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pt_dump_seq_printf(m, "---[ %s ]---\n", st->marker->name);
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st->start_address = addr;
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st->current_prot = prot;
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st->level = level;
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} else if (prot != st->current_prot || level != st->level ||
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addr >= st->marker[1].start_address) {
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seq_printf(m, "0x%0*lx-0x%0*lx ",
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width, st->start_address,
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width, addr);
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pt_dump_seq_printf(m, "0x%0*lx-0x%0*lx ",
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width, st->start_address,
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width, addr);
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delta = (addr - st->start_address) >> 10;
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while (!(delta & 0x3ff) && unit[1]) {
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delta >>= 10;
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unit++;
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}
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seq_printf(m, "%9lu%c ", delta, *unit);
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pt_dump_seq_printf(m, "%9lu%c ", delta, *unit);
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print_prot(m, st->current_prot, st->level);
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while (addr >= st->marker[1].start_address) {
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st->marker++;
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seq_printf(m, "---[ %s ]---\n", st->marker->name);
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pt_dump_seq_printf(m, "---[ %s ]---\n", st->marker->name);
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}
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st->start_address = addr;
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st->current_prot = prot;
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