Re: [dpdk-dev] [PATCH] eal: force IOVA mode to physical

[Hemant <hemant.agrawal@nxp.com>]

On 8/29/2018 9:28 PM, eric zhang wrote:
> This patch adds a configuration option to force the IOVA mode to
> physical address (PA). 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. Having the configuration
> option permits the mode to be explicitly configured in this scenario.
>
> Signed-off-by: eric zhang <eric.zhang@windriver.com>
> ---
>   lib/librte_eal/linuxapp/eal/eal.c | 7 +++++++
you will also need the same in bsdapp/eal

>   1 file changed, 7 insertions(+)
>
> diff --git a/lib/librte_eal/linuxapp/eal/eal.c b/lib/librte_eal/linuxapp/eal/eal.c
> index e0b5ae1..bee4aed 100644
> --- a/lib/librte_eal/linuxapp/eal/eal.c
> +++ b/lib/librte_eal/linuxapp/eal/eal.c
> @@ -805,6 +805,7 @@ static void rte_eal_init_alert(const char *msg)
>   		return -1;
>   	}
>   
> +#ifndef RTE_EAL_IOVA_MODE_PA
Add the default option as 'n'  in config/common_base
>   	/* autodetect the iova mapping mode (default is iova_pa) */
>   	rte_eal_get_configuration()->iova_mode = rte_bus_get_iommu_class();
>   
> @@ -816,6 +817,12 @@ static void rte_eal_init_alert(const char *msg)
>   			"Some devices want IOVA as VA but PA will be used because.. "
>   			"KNI module inserted\n");
>   	}
> +#else
> +	/* Force iova mapping mode to be physical address */
> +	rte_eal_get_configuration()->iova_mode = RTE_IOVA_PA;
> +	RTE_LOG(WARNING, EAL,
> +		"Force the iova mapping mode to be physical address\n");
> +#endif
>   
>   	if (internal_config.no_hugetlbfs == 0 &&
>   			internal_config.process_type != RTE_PROC_SECONDARY &&