From mboxrd@z Thu Jan 1 00:00:00 1970 From: Feng Wu Subject: [v6 5/8] iommu, x86: Add cap_pi_support() to detect VT-d PI capability Date: Thu, 21 May 2015 14:59:12 +0800 Message-ID: <1432191555-3516-6-git-send-email-feng.wu@intel.com> References: <1432191555-3516-1-git-send-email-feng.wu@intel.com> Return-path: In-Reply-To: <1432191555-3516-1-git-send-email-feng.wu@intel.com> Sender: linux-kernel-owner@vger.kernel.org To: joro@8bytes.org, dwmw2@infradead.org Cc: tglx@linutronix.de, jiang.liu@linux.intel.com, iommu@lists.linux-foundation.org, linux-kernel@vger.kernel.org, Feng Wu List-Id: iommu@lists.linux-foundation.org Add helper function to detect VT-d Posted-Interrupts capability. Signed-off-by: Feng Wu Reviewed-by: Jiang Liu Acked-by: David Woodhouse --- 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