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x86/mm/dump_pagetables: Fix printout of p4d level

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Modify printk_prot() and callers to print out additional page table
level correctly.

Signed-off-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Andy Lutomirski <luto@amacapital.net>
Cc: Dave Hansen <dave.hansen@intel.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: linux-arch@vger.kernel.org
Cc: linux-mm@kvack.org
Link: http://lkml.kernel.org/r/20170716225954.74185-3-kirill.shutemov@linux.intel.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
This commit is contained in:
Kirill A. Shutemov 2017-07-17 01:59:48 +03:00 committed by Ingo Molnar
parent 3a366f791d
commit 45dcd20913
1 changed files with 9 additions and 9 deletions
repo.diff.show_diff_stats Download patch file Download diff file Expand all files Collapse all files

18
arch/x86/mm/dump_pagetables.c
View file

@ -138,7 +138,7 @@ static void printk_prot(struct seq_file *m, pgprot_t prot, int level, bool dmsg)
{ {
pgprotval_t pr = pgprot_val(prot); pgprotval_t pr = pgprot_val(prot);
static const char * const level_name[] = static const char * const level_name[] =
{ "cr3", "pgd", "pud", "pmd", "pte" }; { "cr3", "pgd", "p4d", "pud", "pmd", "pte" };
if (!pgprot_val(prot)) { if (!pgprot_val(prot)) {
/* Not present */ /* Not present */
@ -162,12 +162,12 @@ static void printk_prot(struct seq_file *m, pgprot_t prot, int level, bool dmsg)
pt_dump_cont_printf(m, dmsg, " "); pt_dump_cont_printf(m, dmsg, " ");
/* Bit 7 has a different meaning on level 3 vs 4 */ /* Bit 7 has a different meaning on level 3 vs 4 */
if (level <= 3 && pr & _PAGE_PSE) if (level <= 4 && pr & _PAGE_PSE)
pt_dump_cont_printf(m, dmsg, "PSE "); pt_dump_cont_printf(m, dmsg, "PSE ");
else else
pt_dump_cont_printf(m, dmsg, " "); pt_dump_cont_printf(m, dmsg, " ");
if ((level == 4 && pr & _PAGE_PAT) || if ((level == 5 && pr & _PAGE_PAT) ||
((level == 3 || level == 2) && pr & _PAGE_PAT_LARGE)) ((level == 4 || level == 3) && pr & _PAGE_PAT_LARGE))
pt_dump_cont_printf(m, dmsg, "PAT "); pt_dump_cont_printf(m, dmsg, "PAT ");
else else
pt_dump_cont_printf(m, dmsg, " "); pt_dump_cont_printf(m, dmsg, " ");
@ -298,7 +298,7 @@ static void walk_pte_level(struct seq_file *m, struct pg_state *st, pmd_t addr,
for (i = 0; i < PTRS_PER_PTE; i++) { for (i = 0; i < PTRS_PER_PTE; i++) {
prot = pte_flags(*start); prot = pte_flags(*start);
st->current_address = normalize_addr(P + i * PTE_LEVEL_MULT); st->current_address = normalize_addr(P + i * PTE_LEVEL_MULT);
note_page(m, st, __pgprot(prot), 4); note_page(m, st, __pgprot(prot), 5);
start++; start++;
} }
} }
@ -317,13 +317,13 @@ static void walk_pmd_level(struct seq_file *m, struct pg_state *st, pud_t addr,
if (!pmd_none(*start)) { if (!pmd_none(*start)) {
if (pmd_large(*start) || !pmd_present(*start)) { if (pmd_large(*start) || !pmd_present(*start)) {
prot = pmd_flags(*start); prot = pmd_flags(*start);
note_page(m, st, __pgprot(prot), 3); note_page(m, st, __pgprot(prot), 4);
} else { } else {
walk_pte_level(m, st, *start, walk_pte_level(m, st, *start,
P + i * PMD_LEVEL_MULT); P + i * PMD_LEVEL_MULT);
} }
} else } else
note_page(m, st, __pgprot(0), 3); note_page(m, st, __pgprot(0), 4);
start++; start++;
} }
} }
@ -362,13 +362,13 @@ static void walk_pud_level(struct seq_file *m, struct pg_state *st, p4d_t addr,
!pud_already_checked(prev_pud, start, st->check_wx)) { !pud_already_checked(prev_pud, start, st->check_wx)) {
if (pud_large(*start) || !pud_present(*start)) { if (pud_large(*start) || !pud_present(*start)) {
prot = pud_flags(*start); prot = pud_flags(*start);
note_page(m, st, __pgprot(prot), 2); note_page(m, st, __pgprot(prot), 3);
} else { } else {
walk_pmd_level(m, st, *start, walk_pmd_level(m, st, *start,
P + i * PUD_LEVEL_MULT); P + i * PUD_LEVEL_MULT);
} }
} else } else
note_page(m, st, __pgprot(0), 2); note_page(m, st, __pgprot(0), 3);
prev_pud = start; prev_pud = start;
start++; start++;