Thanks for your advice.
It took me a lot of time, to make it work, I was only missing the
ARM-Trusted-Firmware. And now it is working like charm.
I needed to understand jaihouse better and every time I discover new and
interesting information.
Moustafa
On Thursday, 19 August 2021 at 15:56:23 UTC+2 [email protected] wrote:
> On 19.08.21 13:59, Moustafa Nofal wrote:
> > I tried this configuration, but it did not work with me, I attached the
> > log file. I have Pi4(4GB version). Initially installed 5.10, it did not
> > compile so I back-patched to 5.3 and added CONFIG_HOTPLUG_CPU=y to the
> > build configuration, I was able to understand, why it was essential.
> > Then I tried different memory reservations using device tree:
> > reserved-memory {
> > #address-cells=<2>;
> > #size-cells=<1>;
> > ranges;
> > memmap:memmap@0x20000000{
> > reg = <0x0 0x20000000 0x10000000>;
> > };
> > };
> > The memory is reserved and observable at proc/iomem but the result is
> > either crash as in the log file or this:
> > [ 1463.849868] jailhouse: request_mem_region failed for hypervisor
> memory.
> > [ 1463.849882] jailhouse: Did you reserve the memory with "memmap=" or
> > "mem="?
> > In rpi4.c
> > I edited memory regions to begin with 2:
> >
> > .hypervisor_memory = {
> > .phys_start = 0x2fc00000,
> > .size = 0x00400000,
> > },
> > and the same for all memory regions.
> >
> > Something that I do not really understand, is the RAM address. In the
> > jailhouse Image, there was a RAM at 0x20000000 and the image works fine.
> > But in my case there is nothing at this address.
> > Any help would be appreciated and thanks in advance.
> >
>
> Integrating all the loose ends of these targets is a hairy process (I
> stopped counting hours I invested). Therefore, I strongly recommend
> starting from jailhouse-images where the RPi4 works fine, at least here,
> and then step-wise deviate from that towards whatever alternative
> configuration is desired.
>
> Jan
>
> --
> Siemens AG, T RDA IOT
> Corporate Competence Center Embedded Linux
>
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