diff options
| author | Siddha, Suresh B <suresh.b.siddha@intel.com> | 2008-01-30 13:33:43 +0100 |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2008-01-30 13:33:43 +0100 |
| commit | 4138cc3418f5eaa7524ff8e927102863f1ba0ea5 (patch) | |
| tree | b974b9b392b4cd7263596358dd634b11d7e8f350 /arch/x86 | |
| parent | fbd3bfd87f91e6a454f3f61f67ee745f0cb59aa4 (diff) | |
x86: set strong uncacheable where UC is really desired
Also use _PAGE_PWT for all the mappings which need uncache mapping.
Instead of existing PAT2 which is UC- (and can be overwritten by MTRRs),
we now use PAT3 which is strong uncacheable.
This makes it consistent with pgprot_noncached()
Signed-off-by: Suresh Siddha <suresh.b.siddha@intel.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Diffstat (limited to 'arch/x86')
| -rw-r--r-- | arch/x86/mm/ioremap_32.c | 2 | ||||
| -rw-r--r-- | arch/x86/mm/ioremap_64.c | 2 |
2 files changed, 2 insertions, 2 deletions
diff --git a/arch/x86/mm/ioremap_32.c b/arch/x86/mm/ioremap_32.c index 0b278315d73..ef0f6a452ee 100644 --- a/arch/x86/mm/ioremap_32.c +++ b/arch/x86/mm/ioremap_32.c @@ -119,7 +119,7 @@ EXPORT_SYMBOL(__ioremap); void __iomem *ioremap_nocache (unsigned long phys_addr, unsigned long size) { unsigned long last_addr; - void __iomem *p = __ioremap(phys_addr, size, _PAGE_PCD); + void __iomem *p = __ioremap(phys_addr, size, _PAGE_PCD | _PAGE_PWT); if (!p) return p; diff --git a/arch/x86/mm/ioremap_64.c b/arch/x86/mm/ioremap_64.c index d6cf1497682..2815ab60009 100644 --- a/arch/x86/mm/ioremap_64.c +++ b/arch/x86/mm/ioremap_64.c @@ -138,7 +138,7 @@ EXPORT_SYMBOL(__ioremap); void __iomem *ioremap_nocache (unsigned long phys_addr, unsigned long size) { - return __ioremap(phys_addr, size, _PAGE_PCD); + return __ioremap(phys_addr, size, _PAGE_PCD | _PAGE_PWT); } EXPORT_SYMBOL(ioremap_nocache); |