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arm64: fault: Print info about page table structure when dumping pte

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Whilst debugging a remote crash, I noticed that show_pte is unhelpful
when it comes to describing the structure of the page table being walked.
This is easily fixed by printing out the page table (swapper vs user),
page size and virtual address size when displaying the PGD address.

Acked-by: Mark Rutland <mark.rutland@arm.com>
Signed-off-by: Will Deacon <will.deacon@arm.com>
This commit is contained in:
Will Deacon 2017-05-15 15:23:58 +01:00
parent 83016b2042
commit 1eb34b6e51
1 changed files with 3 additions and 1 deletions
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4
arch/arm64/mm/fault.c
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@ -104,7 +104,9 @@ void show_pte(unsigned long addr)
return;
}
pr_alert("pgd = %p\n", mm->pgd);
pr_alert("%s pgtable: %luk pages, %u-bit VAs, pgd = %p\n",
mm == &init_mm ? "swapper" : "user", PAGE_SIZE / SZ_1K,
VA_BITS, mm->pgd);
pgd = pgd_offset(mm, addr);
pr_alert("[%016lx] *pgd=%016llx", addr, pgd_val(*pgd));