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| author | Toshi Kani <toshi.kani@hp.com> | 2015-04-15 00:47:29 +0200 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2015-04-15 01:49:04 +0200 |
| commit | 5d72b4fba40ef4b3f7a1a11d6aacc85d9af81561 (patch) | |
| tree | 94312a459da826b4d0437de9de6f0db856d56c20 /arch/x86/include/asm | |
| parent | mm: change vunmap to tear down huge KVA mappings (diff) | |
| download | linux-5d72b4fba40ef4b3f7a1a11d6aacc85d9af81561.tar.xz linux-5d72b4fba40ef4b3f7a1a11d6aacc85d9af81561.zip | |
x86, mm: support huge I/O mapping capability I/F
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>
Diffstat (limited to 'arch/x86/include/asm')
| -rw-r--r-- | arch/x86/include/asm/page_types.h | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/arch/x86/include/asm/page_types.h b/arch/x86/include/asm/page_types.h index f97fbe3abb67..c7c712f2648b 100644 --- a/arch/x86/include/asm/page_types.h +++ b/arch/x86/include/asm/page_types.h @@ -40,8 +40,10 @@ #ifdef CONFIG_X86_64 #include <asm/page_64_types.h> +#define IOREMAP_MAX_ORDER (PUD_SHIFT) #else #include <asm/page_32_types.h> +#define IOREMAP_MAX_ORDER (PMD_SHIFT) #endif /* CONFIG_X86_64 */ #ifndef __ASSEMBLY__ |