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s390/page table dumper: add support for change-recording override bit
Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
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parent
2a7d2b96d5
commit
1819ed1f06
2 changed files with 22 additions and 5 deletions
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@ -340,6 +340,8 @@ extern unsigned long MODULES_END;
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#define _REGION3_ENTRY_EMPTY (_REGION_ENTRY_TYPE_R3 | _REGION_ENTRY_INV)
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#define _REGION3_ENTRY_LARGE 0x400 /* RTTE-format control, large page */
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#define _REGION3_ENTRY_RO 0x200 /* page protection bit */
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#define _REGION3_ENTRY_CO 0x100 /* change-recording override */
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/* Bits in the segment table entry */
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#define _SEGMENT_ENTRY_ORIGIN ~0x7ffUL/* segment table origin */
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@ -49,10 +49,13 @@ static void print_prot(struct seq_file *m, unsigned int pr, int level)
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{ "ASCE", "PGD", "PUD", "PMD", "PTE" };
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seq_printf(m, "%s ", level_name[level]);
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if (pr & _PAGE_INVALID)
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if (pr & _PAGE_INVALID) {
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seq_printf(m, "I\n");
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else
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seq_printf(m, "%s\n", pr & _PAGE_RO ? "RO" : "RW");
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return;
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}
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seq_printf(m, "%s", pr & _PAGE_RO ? "RO " : "RW ");
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seq_printf(m, "%s", pr & _PAGE_CO ? "CO " : " ");
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seq_putc(m, '\n');
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}
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static void note_page(struct seq_file *m, struct pg_state *st,
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@ -125,6 +128,12 @@ static void walk_pte_level(struct seq_file *m, struct pg_state *st,
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}
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}
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#ifdef CONFIG_64BIT
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#define _PMD_PROT_MASK (_SEGMENT_ENTRY_RO | _SEGMENT_ENTRY_CO)
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#else
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#define _PMD_PROT_MASK 0
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#endif
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static void walk_pmd_level(struct seq_file *m, struct pg_state *st,
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pud_t *pud, unsigned long addr)
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{
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@ -137,7 +146,7 @@ static void walk_pmd_level(struct seq_file *m, struct pg_state *st,
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pmd = pmd_offset(pud, addr);
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if (!pmd_none(*pmd)) {
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if (pmd_large(*pmd)) {
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prot = pmd_val(*pmd) & _SEGMENT_ENTRY_RO;
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prot = pmd_val(*pmd) & _PMD_PROT_MASK;
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note_page(m, st, prot, 3);
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} else
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walk_pte_level(m, st, pmd, addr);
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@ -147,6 +156,12 @@ static void walk_pmd_level(struct seq_file *m, struct pg_state *st,
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}
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}
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#ifdef CONFIG_64BIT
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#define _PUD_PROT_MASK (_REGION3_ENTRY_RO | _REGION3_ENTRY_CO)
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#else
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#define _PUD_PROT_MASK 0
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#endif
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static void walk_pud_level(struct seq_file *m, struct pg_state *st,
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pgd_t *pgd, unsigned long addr)
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{
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@ -159,7 +174,7 @@ static void walk_pud_level(struct seq_file *m, struct pg_state *st,
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pud = pud_offset(pgd, addr);
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if (!pud_none(*pud))
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if (pud_large(*pud)) {
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prot = pud_val(*pud) & _PAGE_RO;
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prot = pud_val(*pud) & _PUD_PROT_MASK;
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note_page(m, st, prot, 2);
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} else
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walk_pmd_level(m, st, pud, addr);
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