Infiniband on s390x

[Josh Boyer]

On Fri, Sep 19, 2014 at 3:20 AM, Michal Toman <mtoman at redhat.com> wrote:
> Hi Josh,
>

CC'ing Fedora kernel list.

> as IBM has recently introduced support for Melanox Inifiniband card on
> s390x, we would like to enable the feature in the default Fedora kernel. The
> same request has already been addressed for RHEL [1].
> I have been playing with the kernel package using the guide [2] and found
> out that the following options seem to do the trick:
>
> CONFIG_PCI=y
> CONFIG_PCI_NR_FUNCTIONS=64
> CONFIG_PCI_NR_MSI=256
> CONFIG_HOTPLUG_PCI=y
> CONFIG_HOTPLUG_PCI_CPCI=y
> CONFIG_HOTPLUG_PCI_SHPC=y
> CONFIG_HOTPLUG_PCI_S390=y
> CONFIG_NETDEV_10000=y
> CONFIG_MLX4_EN=m
> CONFIG_MLX4_EN_DCB=y
> CONFIG_INFINIBAND=m
> CONFIG_INFINIBAND_USER_ACCESS=m
> CONFIG_MLX4_INFINIBAND=m
> CONFIG_RDS=m
> CONFIG_RDS_RDMA=m
> CONFIG_RDS_TCP=m
> CONFIG_IRQ_DOMAIN_DEBUG=y
>
> What is the proper way to get it merged into the default s390x config? Do I
> need to create a patch and submit it somewhere?

This is enough to start with.  I'll enable those options today.  If we
have questions, we'll let you know.

Thanks.

josh