x86, mm: support huge I/O mapping capability I/F

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Implement huge I/O mapping capability interfaces for ioremap() on x86.

IOREMAP_MAX_ORDER is defined to PUD_SHIFT on x86/64 and PMD_SHIFT on
x86/32, which overrides the default value defined in <linux/vmalloc.h>.

Signed-off-by: Toshi Kani <toshi.kani@hp.com>
Cc: "H. Peter Anvin" <hpa@zytor.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: Dave Hansen <dave.hansen@intel.com>
Cc: Robert Elliott <Elliott@hp.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

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Toshi Kani 2015-04-14 15:47:29 -07:00 • committed by Linus Torvalds

parent b9820d8f39

commit 5d72b4fba4

2 changed files with 23 additions and 2 deletions

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2

arch/x86/include/asm/page_types.h

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23

arch/x86/mm/ioremap.c

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