From mboxrd@z Thu Jan 1 00:00:00 1970 From: Feng Wu Subject: [v3 07/26] iommu, x86: Add cap_pi_support() to detect VT-d PI capability Date: Fri, 12 Dec 2014 23:14:41 +0800 Message-ID: <1418397300-10870-8-git-send-email-feng.wu@intel.com> References: <1418397300-10870-1-git-send-email-feng.wu@intel.com> Return-path: In-Reply-To: <1418397300-10870-1-git-send-email-feng.wu@intel.com> Sender: linux-kernel-owner@vger.kernel.org To: tglx@linutronix.de, mingo@redhat.com, hpa@zytor.com, x86@kernel.org, gleb@kernel.org, pbonzini@redhat.com, dwmw2@infradead.org, joro@8bytes.org, alex.williamson@redhat.com, jiang.liu@linux.intel.com Cc: eric.auger@linaro.org, linux-kernel@vger.kernel.org, iommu@lists.linux-foundation.org, kvm@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 --- 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 ecaf3a9..8174ae8 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) -- 1.9.1