From mboxrd@z Thu Jan 1 00:00:00 1970 From: Chas Williams <3chas3@gmail.com> Subject: [PATCH] eal: add option to force IOVA as PA mode Date: Wed, 29 Nov 2017 21:57:21 -0500 Message-ID: <20171130025721.4301-1-3chas3@gmail.com> Cc: skhare@vmware.com, Chas Williams To: dev@dpdk.org Return-path: Received: from mail-qt0-f193.google.com (mail-qt0-f193.google.com [209.85.216.193]) by dpdk.org (Postfix) with ESMTP id 69CC52C3F for ; Thu, 30 Nov 2017 03:57:27 +0100 (CET) Received: by mail-qt0-f193.google.com with SMTP id u10so7109419qtg.2 for ; Wed, 29 Nov 2017 18:57:27 -0800 (PST) List-Id: DPDK patches and discussions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: dev-bounces@dpdk.org Sender: "dev" From: Chas Williams The IOMMU in some machines report that they can only support limited widths. IOVA virtual addresses may exceed this width making the use of IOVA virtual addresses difficult. The option CONFIG_RTE_LIBRTE_USE_PHYS_IOVA can used to force IOVA physical address usage. Signed-off-by: Chas Williams --- config/common_base | 5 +++++ lib/librte_eal/bsdapp/eal/eal.c | 4 ++++ lib/librte_eal/linuxapp/eal/eal.c | 4 ++++ 3 files changed, 13 insertions(+) diff --git a/config/common_base b/config/common_base index e74febe..06b3ded 100644 --- a/config/common_base +++ b/config/common_base @@ -820,3 +820,8 @@ CONFIG_RTE_APP_CRYPTO_PERF=y # Compile the eventdev application # CONFIG_RTE_APP_EVENTDEV=y + +# +# Force IOVA physical addresses in VFIO +# +CONFIG_RTE_LIBRTE_USE_PHYS_IOVA=n diff --git a/lib/librte_eal/bsdapp/eal/eal.c b/lib/librte_eal/bsdapp/eal/eal.c index 369a682..b396285 100644 --- a/lib/librte_eal/bsdapp/eal/eal.c +++ b/lib/librte_eal/bsdapp/eal/eal.c @@ -569,8 +569,12 @@ rte_eal_init(int argc, char **argv) return -1; } +#ifdef RTE_LIBRTE_USE_PHYS_IOVA + rte_eal_get_configuration()->iova_mode = RTE_IOVA_PA; +#else /* autodetect the iova mapping mode (default is iova_pa) */ rte_eal_get_configuration()->iova_mode = rte_bus_get_iommu_class(); +#endif if (internal_config.no_hugetlbfs == 0 && internal_config.process_type != RTE_PROC_SECONDARY && diff --git a/lib/librte_eal/linuxapp/eal/eal.c b/lib/librte_eal/linuxapp/eal/eal.c index 229eec9..13b02fd 100644 --- a/lib/librte_eal/linuxapp/eal/eal.c +++ b/lib/librte_eal/linuxapp/eal/eal.c @@ -804,8 +804,12 @@ rte_eal_init(int argc, char **argv) return -1; } +#ifdef RTE_LIBRTE_USE_PHYS_IOVA + rte_eal_get_configuration()->iova_mode = RTE_IOVA_PA; +#else /* autodetect the iova mapping mode (default is iova_pa) */ rte_eal_get_configuration()->iova_mode = rte_bus_get_iommu_class(); +#endif /* Workaround for KNI which requires physical address to work */ if (rte_eal_get_configuration()->iova_mode == RTE_IOVA_VA && -- 2.9.5