[meta-xilinx] AMP using Yocto meta-xilinx

[Edward Wingate]

Joe, Elvis,

I just found this documentation which probably has what I'm looking for:
http://www.yoctoproject.org/docs/1.7/dev-manual/dev-manual.html#configuring-the-kernel

And it does mention your bitbake menuconfig commands, so I will give
it a try.  Thanks!

Edward



On Fri, Nov 21, 2014 at 10:57 AM, Joe MacDonald
<Joe_MacDonald at mentor.com> wrote:
> Hey Edward,
>
> [Re: [meta-xilinx] AMP using Yocto meta-xilinx] On 14.11.21 (Fri 10:46) Edward Wingate wrote:
>
>> Hi Joe,
>>
>> Thanks for your reply.  I should have clarified, I am trying to do
>> this with Yocto, not Petalinux.  I saw those menu options in the ug978
>> document, but I am under the impression that Yocto doesn't have that
>> GUI to configure kernel options (please let me know if I'm wrong).
>> Instead, the kernel config items are specified in a text file that I
>> think is at meta-xilinx/conf/machine/boards/common/linux/zynq/defconfig_3.14.cfg.
>> I am looking for the text file equivalents of those menu options.
>
> You can create your own kernel config fragments in your own layer, of
> course, so you don't need to modify the defconfig, but I think maybe
> there was a bit of confusion about my notation.  I was just providing
> directions assuming you had done something like this:
>
>    % bitbake -c menuconfig virtual/kernel
>
> or
>
>    % bitbake -c menuconfig linux-xlnx
>
> I definitely wasn't talking about Petalinux, I've only built it a couple
> of times myself.  All of those options are available in the linux-xlnx
> kernel (the one referenced in SRC_URI from
> meta-xilinx/recipes-kernel/linux/linux-xlnx.inc) so you should be good.
> If you set those in your build you can try them out, then maybe use the
> kernel config fragment creation tool (the name escapes me right now
> since I almost never use it myself) to automatically generate just the
> piece you need.
>
> Hope that helps.
> -J.
>
>>
>> Thanks,
>> Edward
>>
>> On Fri, Nov 21, 2014 at 10:26 AM, Joe MacDonald
>> <Joe_MacDonald at mentor.com> wrote:
>> >
>> > Hi Edward,
>> >
>> > I'm in no way an expert, I just fritter around with meta-xilinx from
>> > time to time, but I can probably help with these.  They're all kernel
>> > configuration options, actually.
>> >
>> > [[meta-xilinx] AMP using Yocto meta-xilinx] On 14.11.21 (Fri 10:03) Edward Wingate wrote:
>> >
>> > > I'm trying to configure Yocto Linux with meta-xilinx layer to do AMP on a
>> > > zedboard.
>> > > I'm following the ug978 AMP guide and trying to configure the kernel similarly:
>> > >
>> > > 1. Enable loadable module support
>> > > 2. Select High Memory Support
>> > > 3. Select 2G/2G User/Kernel memory split
>> > > 4. Enable userspace firmware loading support
>> > > 5. Enable rpmsg driver
>> > > 6. Enable remoteproc driver
>> > >
>> > > I am looking for these options in meta-xilinx/conf/machine/boards/common/linux/
>> > > zynq/defconfig_3.14.cfg.  Is this the correct place?
>> > >
>> > > For #1, do these options accomplish loadable module support?
>> > > CONFIG_MODULES=y
>> > > CONFIG_MODULE_UNLOAD=y
>> > > CONFIG_MODULE_FORCE_UNLOAD=y
>> > >
>> > > For #2, CONFIG_HIGHMEM=y
>> > >
>> > > Can someone help me with #3-5?  I don't know what options corresponds with
>> > > those, or if that is even the right file to look for them.
>> >
>> > #3 is:
>> >
>> >    Kernel Features  --->
>> >       Memory split (3G/1G user/kernel split)  --->
>> >          (X) 2G/2G user/kernel split
>> >
>> > and #4 is:
>> >
>> >    Device Drivers  --->
>> >       Generic Driver Options  --->
>> >          -*- Userspace firmware loading support
>> >
>> > > For #6, how would I get the zynq remoteproc driver into the kernel using Yocto
>> > > and meta-xilinx?  I'm assuming #1-5 are standard kernel configurations, but #6
>> > > is zynq specific and wouldn't be a standard kernel config item.
>> >
>> > #5 and #6 are options so long as you're building linux-xlnx of some form
>> > as your virtual/kernel:
>> >
>> >    Device Drivers  --->
>> >       Remoteproc drivers  --->
>> >          < > Support ZYNQ remoteproc
>> >       Rpmsg drivers  --->
>> >          < > rpmsg user driver (for example...)
>> >
>> > >
>> > > Thank you for any help.
>> > >
>> > > Edward
>> >
>> > --
>> > -Joe MacDonald.
>> > :wq
>
> --
> -Joe MacDonald.
> :wq