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| author | Feng Wu <feng.wu@intel.com> | 2015-06-09 13:20:34 +0800 |
|---|---|---|
| committer | Thomas Gleixner <tglx@linutronix.de> | 2015-06-12 11:33:52 +0200 |
| commit | 07c09787b26db724c94a912a572a9a4fa66008f3 (patch) | |
| tree | 78e25d1791a124fd159b7db37ba3ea792433b979 /include/linux/intel-iommu.h | |
| parent | d75f152fc389cdd73a6c17f1247fce9052fd579c (diff) | |
| download | lwn-07c09787b26db724c94a912a572a9a4fa66008f3.tar.gz lwn-07c09787b26db724c94a912a572a9a4fa66008f3.zip | |
iommu, x86: Add cap_pi_support() to detect VT-d PI capability
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>
Reviewed-by: Thomas Gleixner <tglx@linutronix.de>
Acked-by: David Woodhouse <David.Woodhouse@intel.com>
Acked-by: Joerg Roedel <joro@8bytes.org>
Cc: iommu@lists.linux-foundation.org
Cc: dwmw2@infradead.org
Link: http://lkml.kernel.org/r/1433827237-3382-8-git-send-email-feng.wu@intel.com
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Diffstat (limited to 'include/linux/intel-iommu.h')
| -rw-r--r-- | include/linux/intel-iommu.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/include/linux/intel-iommu.h b/include/linux/intel-iommu.h index 0af9b03e2b1c..0c251be39836 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) |