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| author | Eric Zhang <eric.zhang@windriver.com> | 2018-10-03 16:53:13 -0400 |
|---|---|---|
| committer | Thomas Monjalon <thomas@monjalon.net> | 2018-10-29 00:01:05 +0100 |
| commit | 075b182b54ce90e0a22810e67cf3204e22673bac (patch) | |
| tree | 09d5ed1de0bbeff8aae236a1e64c53fd4586344b /lib | |
| parent | 783667c9f90ba3f242fb946c4aefcdaba26ca96a (diff) | |
| download | dpdk-075b182b54ce90e0a22810e67cf3204e22673bac.zip dpdk-075b182b54ce90e0a22810e67cf3204e22673bac.tar.gz dpdk-075b182b54ce90e0a22810e67cf3204e22673bac.tar.xz | |
eal: force IOVA to a particular mode
This patch uses EAL option "--iova-mode" to force the IOVA mode to a
particular value. There exists virtual devices that are not directly
attached to the PCI bus, and therefore the auto detection of the IOVA
mode based on probing the PCI bus and IOMMU configuration may not
report the required addressing mode. Using the EAL option permits the
mode to be explicitly configured in this scenario.
Signed-off-by: Eric Zhang <eric.zhang@windriver.com>
Acked-by: Hemant Agrawal <hemant.agrawal@nxp.com>
Acked-by: Anatoly Burakov <anatoly.burakov@intel.com>
Reviewed-by: Marko Kovacevic <marko.kovacevic@intel.com>
Diffstat (limited to 'lib')
| -rw-r--r-- | lib/librte_eal/bsdapp/eal/eal.c | 11 | ||||
| -rw-r--r-- | lib/librte_eal/linuxapp/eal/eal.c | 27 |
2 files changed, 26 insertions, 12 deletions
diff --git a/lib/librte_eal/bsdapp/eal/eal.c b/lib/librte_eal/bsdapp/eal/eal.c index 21997ce..508cbc4 100644 --- a/lib/librte_eal/bsdapp/eal/eal.c +++ b/lib/librte_eal/bsdapp/eal/eal.c @@ -656,8 +656,15 @@ rte_eal_init(int argc, char **argv) return -1; } - /* autodetect the iova mapping mode (default is iova_pa) */ - rte_eal_get_configuration()->iova_mode = rte_bus_get_iommu_class(); + /* if no EAL option "--iova-mode=<pa|va>", use bus IOVA scheme */ + if (internal_config.iova_mode == RTE_IOVA_DC) { + /* autodetect the IOVA mapping mode (default is RTE_IOVA_PA) */ + rte_eal_get_configuration()->iova_mode = + rte_bus_get_iommu_class(); + } else { + rte_eal_get_configuration()->iova_mode = + internal_config.iova_mode; + } if (internal_config.no_hugetlbfs == 0) { /* rte_config isn't initialized yet */ diff --git a/lib/librte_eal/linuxapp/eal/eal.c b/lib/librte_eal/linuxapp/eal/eal.c index 6a3395f..361744d 100644 --- a/lib/librte_eal/linuxapp/eal/eal.c +++ b/lib/librte_eal/linuxapp/eal/eal.c @@ -912,16 +912,23 @@ rte_eal_init(int argc, char **argv) return -1; } - /* autodetect the iova mapping mode (default is iova_pa) */ - rte_eal_get_configuration()->iova_mode = rte_bus_get_iommu_class(); - - /* Workaround for KNI which requires physical address to work */ - if (rte_eal_get_configuration()->iova_mode == RTE_IOVA_VA && - rte_eal_check_module("rte_kni") == 1) { - rte_eal_get_configuration()->iova_mode = RTE_IOVA_PA; - RTE_LOG(WARNING, EAL, - "Some devices want IOVA as VA but PA will be used because.. " - "KNI module inserted\n"); + /* if no EAL option "--iova-mode=<pa|va>", use bus IOVA scheme */ + if (internal_config.iova_mode == RTE_IOVA_DC) { + /* autodetect the IOVA mapping mode (default is RTE_IOVA_PA) */ + rte_eal_get_configuration()->iova_mode = + rte_bus_get_iommu_class(); + + /* Workaround for KNI which requires physical address to work */ + if (rte_eal_get_configuration()->iova_mode == RTE_IOVA_VA && + rte_eal_check_module("rte_kni") == 1) { + rte_eal_get_configuration()->iova_mode = RTE_IOVA_PA; + RTE_LOG(WARNING, EAL, + "Some devices want IOVA as VA but PA will be used because.. " + "KNI module inserted\n"); + } + } else { + rte_eal_get_configuration()->iova_mode = + internal_config.iova_mode; } if (internal_config.no_hugetlbfs == 0) { |