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authorSheng Yang <sheng@linux.intel.com>2009-03-18 15:33:05 +0800
committerDavid Woodhouse <David.Woodhouse@intel.com>2009-03-24 09:42:43 +0000
commit58c610bd1a3f50820e45a7c09ec0e44d2cda15dd (patch)
tree696539e1e17fd7600222865fa331e9144737a58b /include/linux
parenta1e4ee22863d41a6fbb24310d7951836cb6dafe7 (diff)
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intel-iommu: Snooping control support
Snooping control enabled IOMMU to guarantee DMA cache coherency and thus reduce software effort (VMM) in maintaining effective memory type. Signed-off-by: Sheng Yang <sheng@linux.intel.com> Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
Diffstat (limited to 'include/linux')
-rw-r--r--include/linux/intel-iommu.h2
1 files changed, 1 insertions, 1 deletions
diff --git a/include/linux/intel-iommu.h b/include/linux/intel-iommu.h
index d2e3cbfba14f..3ad894004938 100644
--- a/include/linux/intel-iommu.h
+++ b/include/linux/intel-iommu.h
@@ -123,7 +123,7 @@ static inline void dmar_writeq(void __iomem *addr, u64 val)
#define ecap_eim_support(e) ((e >> 4) & 0x1)
#define ecap_ir_support(e) ((e >> 3) & 0x1)
#define ecap_max_handle_mask(e) ((e >> 20) & 0xf)
-
+#define ecap_sc_support(e) ((e >> 7) & 0x1) /* Snooping Control */
/* IOTLB_REG */
#define DMA_TLB_FLUSH_GRANU_OFFSET 60