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ARM: add support to dump the kernel page tables

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This patch allows the kernel page tables to be dumped via a debugfs file,
allowing kernel developers to check the layout of the kernel page tables
and the verify the various permissions and type settings.

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
This commit is contained in:
Russell King
2013-10-23 16:13:02 +01:00
parent 6ce4eac1f6
commit 1fd15b879d
5 changed files with 360 additions and 0 deletions
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arch/arm/include/asm/pgtable-2level.h
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@@ -160,6 +160,7 @@ static inline pmd_t *pmd_offset(pud_t *pud, unsigned long addr)
return (pmd_t *)pud;
}
#define pmd_large(pmd) (pmd_val(pmd) & 2)
#define pmd_bad(pmd) (pmd_val(pmd) & 2)
#define copy_pmd(pmdpd,pmdps) \