Hi, 

Thanks Philipp for your patience and valuable support.

I changed the areas where the RAM should be placed in the memory node of the device tree and it worked.
Now, I want to test the pci bus by connecting a virtio-blk-pci device via qemu to be mounted on /dev/vda
to do that, I run qemu using the following options : 

$ qemu-system-aarch64 -kernel /home/dawod/workspace/l4re-snapshot-24.08.0/build_aarch64/l4/images/l4re_VM-basic-pci.elf -serial stdio -M virt,virtualization=true,iommu=smmuv3 -cpu cortex-a57 -m 4096 --display none -drive if=none,file=/home/dawod/storage/disk.rootfs.ext4,format=raw,id=disk0 -device virtio-blk-pci,drive=disk0

but the VM hangs in the booting stage while trying to create the /dev/vda block device which will be responsible for handling the added disk.
please find attached a text log from the serial console  : 
vm-blk-pci.log


image.png


Many Thanks,
Regards



On Tue, Oct 22, 2024 at 6:54 PM Philipp Eppelt <philipp.eppelt@kernkonzept.com> wrote:
Hi Mohamed,

I'm happy to see you resolved the issue.
If possible, please prefer a text log from the serial console over a picture,
because the text log is longer and thus provides more information about the
booted system.

uvmm show this error, when memory regions overlap. In this case RAM and the intc
device overlap. The intc device is specified in the device tree you passed to uvmm.
Here, the device tree does not contain explicit RAM regions, so uvmm sets up the
default RAM region, which spans the area starting at zero up to the size of the
RAM you configured in the ned script.
In this case, RAM covers the area [      0: fff'ffff] (256MB).
The itc device wants to allocate the area [0x0800'0000 : 0x0800'ffff] which is
contained within the already existing RAM allocation. Thus the error message.

You have two options, either specify the areas where the RAM should be placed in
the memory node of the device tree or move the intc device such that it doesn't
overlap. For this setup this means above 0x1000'0000.


Cheers
Philipp


Am 22.10.24 um 09:36 schrieb Mohamed Dawod:
> I upgraded L4 version to 24.08 instead of 23.10 because 24.08 contains the
> missing virt-arm_virt-64_pci.dts file.
> I'm building for arm64 and when I run the demo VM-basic-pci, I got the following
> error !
> I didn't change anything in the dts/dtb or ned scripts excepting the typo of
>
>       overlay = "-drom/virt-pci.dtbo"
>
>
> What is the problem here ?
>
> image.png
>
> On Mon, Oct 21, 2024 at 11:35 AM Philipp Eppelt <philipp.eppelt@kernkonzept.com
> <mailto:philipp.eppelt@kernkonzept.com>> wrote:
>
>     Hi Mohamed,
>
>     can you please check your arm64 build tree and look into the folder
>     'assets/dtb/'? There should be links to all the .dtb files of uvmm. The link of
>     the file in question on my machine is:
>
>     [...]/.build-arm64/pkg/uvmm/configs/dts/OBJ-arm64_armv8a-std-l4f/virt-arm_virt-64_pci.dtb
>
>     If the file is missing in the linked folder, please check the corresponding
>     source directory:
>
>     <src>/pkg/uvmm/configs/dts/
>
>     If virt-arm_virt-64_pci.dts isn't in there, you can download it from our
>     development version of L4Re on github and recompile the uvmm package.
>
>     https://github.com/kernkonzept/uvmm/blob/master/configs/dts/virt-arm_virt-64_pci.dts <https://github.com/kernkonzept/uvmm/blob/master/configs/dts/virt-arm_virt-64_pci.dts>
>
>     If the file is there, please check that '<arm64-build>/assets' directory is in
>     your MODULE_SEARCH_PATH.
>
>     Let me know, if this solves the missing file problem.
>
>     Cheers,
>     Philipp
>
>
>
>     Am 20.10.24 um 09:20 schrieb Mohamed Dawod:
>      > Thanks Matthias
>      > I'm going to fix the typo of *virt-pci.dtbo*.
>      > What about the missing file *dtb/virt-arm_virt-64_pci.dtb *?
>      >
>      >
>      > On Tue, Oct 15, 2024 at 11:58 PM Matthias Lange
>     <matthias.lange@kernkonzept.com <mailto:matthias.lange@kernkonzept.com>
>      > <mailto:matthias.lange@kernkonzept.com
>     <mailto:matthias.lange@kernkonzept.com>>> wrote:
>      >
>      >     Hi Mohamed,
>      >
>      >     On [15-10-2024 16:59], Mohamed Dawod wrote:
>      >      > Hi,
>      >      > I was trying to run the L4 demo *vm-basic-pci* for *arm64* using
>     the command
>      >      > $ make qemu E=vm-basic-pci
>      >      > but It didn't work because of the missing 2 files :
>      >      > * virt-arm_virt-64_pci.dtb : which is requested by the
>     *modules.list* file
>      >      > in the line :
>      >      >
>      >      > > module[arch=arm64,fname=virt-pci.dtb]   
>       dtb/virt-arm_virt-64_pci.dtb
>      >      >
>      >      > * virt-pci.dtbo : which is requested by the *vm-basic-pci.cfg* by the
>      >      > configuration
>      >      >
>      >      > > if (L4.Info.arch() == "arm64") then
>      >      > >    dt = "-drom/.fdt"
>      >      > >    overlay = "*-drom/virt-pci.dtbo*"
>      >
>      >     This is actually a typo. Please change this line to
>      >
>      >        overlay = "-drom/virt-pci.dtb"
>      >
>      >     Best,
>      >     Matthias.
>      >
>      >      > > else
>      >      > >    dt = "-drom/virt-pci.dtb"
>      >      > >    overlay = ""
>      >      > > end
>      >      >
>      >      >
>      >      > I searched for both files in the whole *l4re-snapshot-23.10.1*
>     directory
>      >      > but I couldn't find them
>      >      > Where can I find those necessary files to run *vm-basic-pc*i demo?
>      >      >
>      >      > Thanks in advance,
>      >      > Regards
>      >      >
>      >      > --
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