lkml.org 
[lkml]   [2015]   [Jun]   [5]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
    Patch in this message
    /
    From
    Subject[v9 6/9] iommu, x86: Add cap_pi_support() to detect VT-d PI capability
    Date
    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


    \
     
     \ /
      Last update: 2015-06-05 08:21    [W:4.147 / U:0.044 seconds]
    ©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site