On 04.02.19 09:14, Arvid Rosén wrote:
Hi,

Thanks for getting back to me!

Jan, of course you are right. I did not reserve the memory needed, but I now 
remember reading about it for other platforms. Do you have any idea how to do 
it for this particular board? Peng might know I guess.

The description, "Reservation via device tree: reg = <0x0 0xffaf0000 0x0 
0x510000>", doesn't get me all the way to understanding exactly how to do this. But I 
guess I will need to read up on the device tree and how to reserve memory regions, or can this 
be achieved using boot parameters?

If the reservation is at the end of the physical memory, you can also reduce it via "mem=xxxM". To punch a whole, you do need that device tree change.

reserved-memory = {
        jailhouse@ffaf0000 {
                reg = <0x0 0xffaf0000 0x0 0x510000>;
                no-map;
        };
};

Jan

--
Siemens AG, Corporate Technology, CT RDA IOT SES-DE
Corporate Competence Center Embedded Linux

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