From mboxrd@z Thu Jan 1 00:00:00 1970 From: Alejandro Lucero Subject: [PATCH v2 3/6] bus/pci: check iommu addressing limitation just once Date: Fri, 5 Oct 2018 13:06:49 +0100 Message-ID: <1538741212-7922-4-git-send-email-alejandro.lucero@netronome.com> References: <1538741212-7922-1-git-send-email-alejandro.lucero@netronome.com> To: dev@dpdk.org Return-path: Received: from netronome.com (host-79-78-33-110.static.as9105.net [79.78.33.110]) by dpdk.org (Postfix) with ESMTP id 2FDD32952 for ; Fri, 5 Oct 2018 14:08:18 +0200 (CEST) Received: from netronome.com (localhost [127.0.0.1]) by netronome.com (8.14.4/8.14.4/Debian-4.1ubuntu1) with ESMTP id w95C6wC9007979 for ; Fri, 5 Oct 2018 13:06:58 +0100 Received: (from alucero@localhost) by netronome.com (8.14.4/8.14.4/Submit) id w95C6v5r007978 for dev@dpdk.org; Fri, 5 Oct 2018 13:06:57 +0100 In-Reply-To: <1538741212-7922-1-git-send-email-alejandro.lucero@netronome.com> List-Id: DPDK patches and discussions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: dev-bounces@dpdk.org Sender: "dev" Current code checks if IOMMU hardware reports enough addressing bits for using IOVA mode but it repeats the same check for any PCI device present. This is not necessary because the IOMMU hardware is the same for all of them. This patch only checks the IOMMU using first PCI device found. Signed-off-by: Alejandro Lucero --- drivers/bus/pci/linux/pci.c | 7 +++++-- 1 file changed, 5 insertions(+), 2 deletions(-) diff --git a/drivers/bus/pci/linux/pci.c b/drivers/bus/pci/linux/pci.c index 04648ac..a871549 100644 --- a/drivers/bus/pci/linux/pci.c +++ b/drivers/bus/pci/linux/pci.c @@ -620,8 +620,11 @@ FOREACH_DEVICE_ON_PCIBUS(dev) { if (!rte_pci_match(drv, dev)) continue; - if (!pci_one_device_iommu_support_va(dev)) - return false; + /* + * just one PCI device needs to be checked out because + * the IOMMU hardware is the same for all of them. + */ + return pci_one_device_iommu_support_va(dev); } } return true; -- 1.9.1