From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752748AbbETF0Y (ORCPT ); Wed, 20 May 2015 01:26:24 -0400 Received: from mga01.intel.com ([192.55.52.88]:50878 "EHLO mga01.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752491AbbETFYm (ORCPT ); Wed, 20 May 2015 01:24:42 -0400 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.13,463,1427785200"; d="scan'208";a="574074455" From: Feng Wu 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 Subject: [v5 6/9] iommu, x86: Add cap_pi_support() to detect VT-d PI capability Date: Wed, 20 May 2015 13:15:34 +0800 Message-Id: <1432098937-19527-7-git-send-email-feng.wu@intel.com> X-Mailer: git-send-email 2.1.0 In-Reply-To: <1432098937-19527-1-git-send-email-feng.wu@intel.com> References: <1432098937-19527-1-git-send-email-feng.wu@intel.com> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.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