From f74d50a7dfccb928e7b4ac75af7817703be5697b Mon Sep 17 00:00:00 2001 From: Alejandro Lucero Date: Fri, 5 Oct 2018 13:45:24 +0100 Subject: [PATCH] bus/pci: check IOMMU addressing limitation just once 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 Acked-by: Anatoly Burakov --- 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 145cb1091a..649ef3c392 100644 --- a/drivers/bus/pci/linux/pci.c +++ b/drivers/bus/pci/linux/pci.c @@ -621,8 +621,11 @@ pci_devices_iommu_support_va(void) 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;