[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]
Message-Id: <1433482974-14614-7-git-send-email-feng.wu@intel.com>
Date: Fri, 5 Jun 2015 13:42:51 +0800
From: Feng Wu <feng.wu@...el.com>
To: joro@...tes.org, dwmw2@...radead.org, tglx@...utronix.de
Cc: jiang.liu@...ux.intel.com, iommu@...ts.linux-foundation.org,
linux-kernel@...r.kernel.org, Feng Wu <feng.wu@...el.com>
Subject: [v9 6/9] 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@...el.com>
Reviewed-by: Jiang Liu <jiang.liu@...ux.intel.com>
Acked-by: David Woodhouse <David.Woodhouse@...el.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
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/
Powered by blists - more mailing lists