On Thu, Oct 24, 2024 at 3:20 PM Philipp Eppelt <philipp.eppelt@kernkonzept.com> wrote:

Hi Mohamed,

just a quick reply. Long one comes later.

Am 24.10.24 um 12:47 schrieb Mohamed Dawod:
> Hi Philipp,
>
> The mentioned commit didn't help.
> Also the added qemu configuration didn't change anything.
> I added `earlyprinkt=serial,ttyS0` in order to show more logs from the VM kernel
Sorry, I mistyped: the linux cmdline argument is `earlyprintk=serial,ttyS0`.
(not earlyprinkt).

Cheers,
Philipp

> but nothing new.
>
> I also think that it's an interrupt issue!
> I'm not an expert in device tree nodes, How can I use Legacy IRQ instead of MSI-X ?
>
> Thanks,
> Regards
>
> On Wed, Oct 23, 2024 at 5:34 PM Philipp Eppelt <philipp.eppelt@kernkonzept.com
> <mailto:philipp.eppelt@kernkonzept.com>> wrote:
>
> Hi Mohamed,
>
> I'm not quite certain where this issue comes from. My hunch is, it's an
> interrupt issue. Please try to cherry-pick this commit [1] to uvmm and see if
> this helps. The commit is new and probably not part of the snapshot.
>
> Another thing is that you configured qemu to use legacy virtio devices. Please
> add `disable-legacy=on,disable-modern=off` to -device virtio-blk-pci,...
>
>
> Also note, that hardware pass-through of PCIe devices on arm64 is not yet
> supporting MSI-X. Meaning, the device tree node of the PCIe host bridge device
> for uvmm should not mention the msi-map property. Legacy IRQ should work,
> though.
>
>
> Hint: add `earlyprinkt=serial,ttyS0` to the guest linux' command line to see
> more information from the guest linux boot.
>
>
> Let's see what these things change.
>
> Cheers,
> Philipp
>
>
>
> [1]
> https://github.com/kernkonzept/uvmm/commit/b8bcbf4d34460cc7d66dcdcb7763fc1e84dbae82 <https://github.com/kernkonzept/uvmm/commit/b8bcbf4d34460cc7d66dcdcb7763fc1e84dbae82>
>
>
>
>
>
>
> Am 23.10.24 um 11:52 schrieb Mohamed Dawod:
> > 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
> >
> >
> <https://mail.google.com/mail/u/0?ui=2&ik=b05e32a9ef&attid=0.1&permmsgid=msg-a:r-4942377897740831663&view=att&disp=safe&realattid=f_m2lp0t191 <https://mail.google.com/mail/u/0?ui=2&ik=b05e32a9ef&attid=0.1&permmsgid=msg-a:r-4942377897740831663&view=att&disp=safe&realattid=f_m2lp0t191>>
> >
> > image.png
> >
> >
> > Many Thanks,
> > Regards
> >
> >
> >
> > On Tue, Oct 22, 2024 at 6:54 PM Philipp Eppelt
> <philipp.eppelt@kernkonzept.com <mailto:philipp.eppelt@kernkonzept.com>
> > <mailto:philipp.eppelt@kernkonzept.com
> <mailto: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>
> <mailto:philipp.eppelt@kernkonzept.com <mailto:philipp.eppelt@kernkonzept.com>>
> > > <mailto:philipp.eppelt@kernkonzept.com
> <mailto:philipp.eppelt@kernkonzept.com>
> > <mailto: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> <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>> <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> <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>>
> > <mailto:matthias.lange@kernkonzept.com
> <mailto:matthias.lange@kernkonzept.com>
> <mailto:matthias.lange@kernkonzept.com <mailto:matthias.lange@kernkonzept.com>>>
> > > > <mailto:matthias.lange@kernkonzept.com
> <mailto:matthias.lange@kernkonzept.com>
> > <mailto:matthias.lange@kernkonzept.com
> <mailto:matthias.lange@kernkonzept.com>>
> > > <mailto: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
> > > > >
> > > > > --
> > > > > Mohamed Dawod
> > > > > *Software Engineer,* Cairo Egypt
> > > > >
> > > > > --
> > > > >
> > > > >
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Kernkonzept GmbH. Sitz: Dresden. Amtsgericht Dresden, HRB 31129.
Geschäftsführer: Dr.-Ing. Michael Hohmuth