diff options
| author | Kirill A. Shutemov <kirill.shutemov@linux.intel.com> | 2017-07-17 01:59:47 +0300 |
|---|---|---|
| committer | Ingo Molnar <mingo@kernel.org> | 2017-07-21 11:05:17 +0300 |
| commit | 3a366f791d83c690f3042e37f410f38de04fb4c7 (patch) | |
| tree | 3dd47fe8d05f35acaf13d4f3241ba5e8ab8eb802 /arch/x86/mm/dump_pagetables.c | |
| parent | 693bf0aa01b7f9a1b24b2b932d555c6667f17a1a (diff) | |
| download | linux-3a366f791d83c690f3042e37f410f38de04fb4c7.tar.xz | |
x86/mm/dump_pagetables: Generalize address normalization
Modify normalize_addr to handle different sizes of virtual address
space.
It's preparation for enabling 5-level paging.
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/20170716225954.74185-2-kirill.shutemov@linux.intel.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'arch/x86/mm/dump_pagetables.c')
| -rw-r--r-- | arch/x86/mm/dump_pagetables.c | 11 |
1 files changed, 6 insertions, 5 deletions
diff --git a/arch/x86/mm/dump_pagetables.c b/arch/x86/mm/dump_pagetables.c index 0470826d2bdc..a824d575bb84 100644 --- a/arch/x86/mm/dump_pagetables.c +++ b/arch/x86/mm/dump_pagetables.c @@ -188,11 +188,12 @@ static void printk_prot(struct seq_file *m, pgprot_t prot, int level, bool dmsg) */ static unsigned long normalize_addr(unsigned long u) { -#ifdef CONFIG_X86_64 - return (signed long)(u << 16) >> 16; -#else - return u; -#endif + int shift; + if (!IS_ENABLED(CONFIG_X86_64)) + return u; + + shift = 64 - (__VIRTUAL_MASK_SHIFT + 1); + return (signed long)(u << shift) >> shift; } /* |