Commit 1819ed1f authored by Heiko Carstens's avatar Heiko Carstens Committed by Martin Schwidefsky

s390/page table dumper: add support for change-recording override bit

Signed-off-by: default avatarHeiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: default avatarMartin Schwidefsky <schwidefsky@de.ibm.com>
parent 2a7d2b96
......@@ -340,6 +340,8 @@ extern unsigned long MODULES_END;
#define _REGION3_ENTRY_EMPTY (_REGION_ENTRY_TYPE_R3 | _REGION_ENTRY_INV)
#define _REGION3_ENTRY_LARGE 0x400 /* RTTE-format control, large page */
#define _REGION3_ENTRY_RO 0x200 /* page protection bit */
#define _REGION3_ENTRY_CO 0x100 /* change-recording override */
/* Bits in the segment table entry */
#define _SEGMENT_ENTRY_ORIGIN ~0x7ffUL/* segment table origin */
......
......@@ -49,10 +49,13 @@ static void print_prot(struct seq_file *m, unsigned int pr, int level)
{ "ASCE", "PGD", "PUD", "PMD", "PTE" };
seq_printf(m, "%s ", level_name[level]);
if (pr & _PAGE_INVALID)
if (pr & _PAGE_INVALID) {
seq_printf(m, "I\n");
else
seq_printf(m, "%s\n", pr & _PAGE_RO ? "RO" : "RW");
return;
}
seq_printf(m, "%s", pr & _PAGE_RO ? "RO " : "RW ");
seq_printf(m, "%s", pr & _PAGE_CO ? "CO " : " ");
seq_putc(m, '\n');
}
static void note_page(struct seq_file *m, struct pg_state *st,
......@@ -125,6 +128,12 @@ static void walk_pte_level(struct seq_file *m, struct pg_state *st,
}
}
#ifdef CONFIG_64BIT
#define _PMD_PROT_MASK (_SEGMENT_ENTRY_RO | _SEGMENT_ENTRY_CO)
#else
#define _PMD_PROT_MASK 0
#endif
static void walk_pmd_level(struct seq_file *m, struct pg_state *st,
pud_t *pud, unsigned long addr)
{
......@@ -137,7 +146,7 @@ static void walk_pmd_level(struct seq_file *m, struct pg_state *st,
pmd = pmd_offset(pud, addr);
if (!pmd_none(*pmd)) {
if (pmd_large(*pmd)) {
prot = pmd_val(*pmd) & _SEGMENT_ENTRY_RO;
prot = pmd_val(*pmd) & _PMD_PROT_MASK;
note_page(m, st, prot, 3);
} else
walk_pte_level(m, st, pmd, addr);
......@@ -147,6 +156,12 @@ static void walk_pmd_level(struct seq_file *m, struct pg_state *st,
}
}
#ifdef CONFIG_64BIT
#define _PUD_PROT_MASK (_REGION3_ENTRY_RO | _REGION3_ENTRY_CO)
#else
#define _PUD_PROT_MASK 0
#endif
static void walk_pud_level(struct seq_file *m, struct pg_state *st,
pgd_t *pgd, unsigned long addr)
{
......@@ -159,7 +174,7 @@ static void walk_pud_level(struct seq_file *m, struct pg_state *st,
pud = pud_offset(pgd, addr);
if (!pud_none(*pud))
if (pud_large(*pud)) {
prot = pud_val(*pud) & _PAGE_RO;
prot = pud_val(*pud) & _PUD_PROT_MASK;
note_page(m, st, prot, 2);
} else
walk_pmd_level(m, st, pud, addr);
......
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