Messages in this thread Patch in this message | | | From | Feng Wu <> | Subject | [v7 5/8] iommu, x86: Add cap_pi_support() to detect VT-d PI capability | Date | Mon, 25 May 2015 13:28:51 +0800 |
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Add helper function to detect VT-d Posted-Interrupts capability.
Signed-off-by: Feng Wu <feng.wu@intel.com> Reviewed-by: Jiang Liu <jiang.liu@linux.intel.com> Acked-by: David Woodhouse <David.Woodhouse@intel.com> --- include/linux/intel-iommu.h | 1 + 1 file changed, 1 insertion(+)
diff --git a/include/linux/intel-iommu.h b/include/linux/intel-iommu.h index 0af9b03..0c251be 100644 --- a/include/linux/intel-iommu.h +++ b/include/linux/intel-iommu.h @@ -87,6 +87,7 @@ static inline void dmar_writeq(void __iomem *addr, u64 val) /* * Decoding Capability Register */ +#define cap_pi_support(c) (((c) >> 59) & 1) #define cap_read_drain(c) (((c) >> 55) & 1) #define cap_write_drain(c) (((c) >> 54) & 1) #define cap_max_amask_val(c) (((c) >> 48) & 0x3f) -- 2.1.0
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