Query for running Xen on ARM

Query for running Xen on ARM

[Chaitanya Deshpande]

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Hi,



I am Chaitanya, pursuing my master’s degree from Portland State University
in Embedded Systems.



I have started working on Xen Project and I am beginner in this field.



I have followed all the steps which are given in this link –



https://wiki.xenproject.org/wiki/Xen_ARM_with_Virtualization_Extensions/qemu-system-aarch64



https://wiki.xenproject.org/wiki/Xen_ARM_with_Virtualization_Extensions#Building_Xen_on_ARM


1) I have used buildroot(rootfs.cpio) for building Linux.

2) I have succeeded in booting Linux on Qemu (qemu-system-.aarch64)

3) Used make dist-xen XEN_TARGET_ARCH=arm64
CROSS_COMPILE=aarch64-linux-gnu-  for cross compiling and getting Xen
binary.

4) My root is root - root=/dev/sda1


After running the  last step UEFI Prompt opens and it gives me this error.



error: no such device: root.

Press any key to continue...
EFI stub: Booting Linux Kernel...
EFI stub: Using DTB from configuration table
EFI stub: Exiting boot services and installing virtual address map...
[   11.231789] acpi PNP0A08:00: Bus 0000:00 not present in PCI namespace
[   41.972816] NMI watchdog: BUG: soft lockup - CPU#1 stuck for 23s!
[swapper/0:1]
[  229.940369] NMI watchdog: BUG: soft lockup - CPU#0 stuck for 23s!
[swapper/0:1]
[  257.939966] NMI watchdog: BUG: soft lockup - CPU#0 stuck for 23s!
[swapper/0:1]
[  290.035395] NMI watchdog: BUG: soft lockup - CPU#3 stuck for 23s!
[swapper/0:1]
[  303.595373] kvm [1]: error: no compatible GIC node found
[  303.619405] kvm [1]: error initializing Hyp mode: -19





I am unable to find the root cause of this issue. Please can anyone help me
with this.



Thanks,

Chaitanya

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Re: Query for running Xen on ARM

[Julien Grall]

(+Stefano)

On 27/05/18 18:48, Chaitanya Deshpande wrote:
> Hi,

Hello Chaitanya,

> I am Chaitanya, pursuing my master’s degree from Portland State 
> University in Embedded Systems.
> 
> I have started working on Xen Project and I am beginner in this field.
> 
> I have followed all the steps which are given in this link –
> 
> https://wiki.xenproject.org/wiki/Xen_ARM_with_Virtualization_Extensions/qemu-system-aarch64
> 
> https://wiki.xenproject.org/wiki/Xen_ARM_with_Virtualization_Extensions#Building_Xen_on_ARM
> 
> 
> 1) I have used buildroot(rootfs.cpio) for building Linux.
> 
> 2) I have succeeded in booting Linux on Qemu (qemu-system-.aarch64)
> 
> 3) Used make dist-xen XEN_TARGET_ARCH=arm64 
> CROSS_COMPILE=aarch64-linux-gnu-  for cross compiling and getting Xen 
> binary.
> 
> 4) My root is root - root=/dev/sda1

May I ask why the root is different from the example in the wiki page? 
Are you using a different setup for the disk (e.g no virtio)?

> 
> 
> After running the  last step UEFI Prompt opens and it gives me this error.

What do you mean? Which last step?

> 
> error: no such device: root.

This is coming from UEFI, right?

> 
> Press any key to continue...
> EFI stub: Booting Linux Kernel...

This is booting Linux and not Xen. It is also trying to using ACPI 
rather than DT. Would it be possible for you to drop to the UEFI shell 
and try to boot by hand?

> EFI stub: Using DTB from configuration table
> EFI stub: Exiting boot services and installing virtual address map...
> [   11.231789] acpi PNP0A08:00: Bus 0000:00 not present in PCI namespace
> [   41.972816] NMI watchdog: BUG: soft lockup - CPU#1 stuck for 23s! 
> [swapper/0:1]
> [  229.940369] NMI watchdog: BUG: soft lockup - CPU#0 stuck for 23s! 
> [swapper/0:1]
> [  257.939966] NMI watchdog: BUG: soft lockup - CPU#0 stuck for 23s! 
> [swapper/0:1]
> [  290.035395] NMI watchdog: BUG: soft lockup - CPU#3 stuck for 23s! 
> [swapper/0:1]
> [  303.595373] kvm [1]: error: no compatible GIC node found
> [  303.619405] kvm [1]: error initializing Hyp mode: -19
> 
> I am unable to find the root cause of this issue. Please can anyone help 
> me with this.

Cheers,

-- 
Julien Grall

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Re: Query for running Xen on ARM

[Chaitanya Deshpande]

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Hi Stefano, Julien,

I am able to solve that problem. Now the problem I am facing is my qemu is
unable to find file system from EFI.

Please find attached copy with this Email.

No fs0: in mapping table. (Only BLK0: and BLK1:)

Thanks,
Chaitanya

On Tue, May 29, 2018 at 7:35 AM, Julien Grall <julien.grall@arm.com> wrote:

> (+Stefano)
>
> On 27/05/18 18:48, Chaitanya Deshpande wrote:
>
>> Hi,
>>
>
> Hello Chaitanya,
>
> I am Chaitanya, pursuing my master’s degree from Portland State University
>> in Embedded Systems.
>>
>> I have started working on Xen Project and I am beginner in this field.
>>
>> I have followed all the steps which are given in this link –
>>
>> https://wiki.xenproject.org/wiki/Xen_ARM_with_Virtualization
>> _Extensions/qemu-system-aarch64
>>
>> https://wiki.xenproject.org/wiki/Xen_ARM_with_Virtualization
>> _Extensions#Building_Xen_on_ARM
>>
>>
>> 1) I have used buildroot(rootfs.cpio) for building Linux.
>>
>> 2) I have succeeded in booting Linux on Qemu (qemu-system-.aarch64)
>>
>> 3) Used make dist-xen XEN_TARGET_ARCH=arm64 CROSS_COMPILE=aarch64-linux-gnu-
>> for cross compiling and getting Xen binary.
>>
>> 4) My root is root - root=/dev/sda1
>>
>
> May I ask why the root is different from the example in the wiki page? Are
> you using a different setup for the disk (e.g no virtio)?
>
>
>>
>> After running the  last step UEFI Prompt opens and it gives me this error.
>>
>
> What do you mean? Which last step?
>
>
>> error: no such device: root.
>>
>
> This is coming from UEFI, right?
>
>
>> Press any key to continue...
>> EFI stub: Booting Linux Kernel...
>>
>
> This is booting Linux and not Xen. It is also trying to using ACPI rather
> than DT. Would it be possible for you to drop to the UEFI shell and try to
> boot by hand?
>
> EFI stub: Using DTB from configuration table
>> EFI stub: Exiting boot services and installing virtual address map...
>> [   11.231789] acpi PNP0A08:00: Bus 0000:00 not present in PCI namespace
>> [   41.972816] NMI watchdog: BUG: soft lockup - CPU#1 stuck for 23s!
>> [swapper/0:1]
>> [  229.940369] NMI watchdog: BUG: soft lockup - CPU#0 stuck for 23s!
>> [swapper/0:1]
>> [  257.939966] NMI watchdog: BUG: soft lockup - CPU#0 stuck for 23s!
>> [swapper/0:1]
>> [  290.035395] NMI watchdog: BUG: soft lockup - CPU#3 stuck for 23s!
>> [swapper/0:1]
>> [  303.595373] kvm [1]: error: no compatible GIC node found
>> [  303.619405] kvm [1]: error initializing Hyp mode: -19
>>
>> I am unable to find the root cause of this issue. Please can anyone help
>> me with this.
>>
>
> Cheers,
>
> --
> Julien Grall
>

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Re: Query for running Xen on ARM

[Chaitanya Deshpande]

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Thanks you so much for the pointers.

On Tue, May 29, 2018 at 7:35 AM, Julien Grall <julien.grall@arm.com> wrote:

> (+Stefano)
>
> On 27/05/18 18:48, Chaitanya Deshpande wrote:
>
>> Hi,
>>
>
> Hello Chaitanya,
>
> I am Chaitanya, pursuing my master’s degree from Portland State University
>> in Embedded Systems.
>>
>> I have started working on Xen Project and I am beginner in this field.
>>
>> I have followed all the steps which are given in this link –
>>
>> https://wiki.xenproject.org/wiki/Xen_ARM_with_Virtualization
>> _Extensions/qemu-system-aarch64
>>
>> https://wiki.xenproject.org/wiki/Xen_ARM_with_Virtualization
>> _Extensions#Building_Xen_on_ARM
>>
>>
>> 1) I have used buildroot(rootfs.cpio) for building Linux.
>>
>> 2) I have succeeded in booting Linux on Qemu (qemu-system-.aarch64)
>>
>> 3) Used make dist-xen XEN_TARGET_ARCH=arm64 CROSS_COMPILE=aarch64-linux-gnu-
>> for cross compiling and getting Xen binary.
>>
>> 4) My root is root - root=/dev/sda1
>>
>
> May I ask why the root is different from the example in the wiki page? Are
> you using a different setup for the disk (e.g no virtio)?


    Chaitanya - For building linux I am using buildroot toolchain (my root
is /path/to/rootfs.cpio) and I able to run the linux on ARM64 (Qemu).

>
>
>
>>
>> After running the  last step UEFI Prompt opens and it gives me this error.
>>
>
> What do you mean? Which last step?
>
>
>> error: no such device: root.
>>
>
> This is coming from UEFI, right?


   Chaitanya - Yes it was. But I changed the root and it worked for me.

>
>
>
>> Press any key to continue...
>> EFI stub: Booting Linux Kernel...
>>
>
> This is booting Linux and not Xen. It is also trying to using ACPI rather
> than DT. Would it be possible for you to drop to the UEFI shell and try to
> boot by hand?


   Chaitanya -  Yes. I am trying that but I am unable to find fs0: in the
mapping table of qemu. (It is showing only BLK0: and BLK1:)
   I have xen.cfg and xen.efi in the root@127.0.0.1:/boot/efi folder but I
am unable to reach to that folder from qemu UEFI.


>
>
> EFI stub: Using DTB from configuration table
>> EFI stub: Exiting boot services and installing virtual address map...
>> [   11.231789] acpi PNP0A08:00: Bus 0000:00 not present in PCI namespace
>> [   41.972816] NMI watchdog: BUG: soft lockup - CPU#1 stuck for 23s!
>> [swapper/0:1]
>> [  229.940369] NMI watchdog: BUG: soft lockup - CPU#0 stuck for 23s!
>> [swapper/0:1]
>> [  257.939966] NMI watchdog: BUG: soft lockup - CPU#0 stuck for 23s!
>> [swapper/0:1]
>> [  290.035395] NMI watchdog: BUG: soft lockup - CPU#3 stuck for 23s!
>> [swapper/0:1]
>> [  303.595373] kvm [1]: error: no compatible GIC node found
>> [  303.619405] kvm [1]: error initializing Hyp mode: -19
>>
>> I am unable to find the root cause of this issue. Please can anyone help
>> me with this.
>>
>
> Cheers,
>
> --
> Julien Grall
>

Thanks,
Chaitanya

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Re: Query for running Xen on ARM

[Stefano Stabellini]

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FS0: is mapped to the first partition on your disk, that needs to be
formatted with the FAT filesystem. Do you have a FAT partition on your
disk?

On Tue, 29 May 2018, Chaitanya Deshpande wrote:
> Hi Stefano, Julien,
> I am able to solve that problem. Now the problem I am facing is my qemu is unable to find file system from EFI.
> 
> Please find attached copy with this Email.
> 
> No fs0: in mapping table. (Only BLK0: and BLK1:)
> 
> Thanks,
> Chaitanya
> 
> On Tue, May 29, 2018 at 7:35 AM, Julien Grall <julien.grall@arm.com> wrote:
>       (+Stefano)
> 
>       On 27/05/18 18:48, Chaitanya Deshpande wrote:
>             Hi,
> 
> 
>       Hello Chaitanya,
> 
>             I am Chaitanya, pursuing my master’s degree from Portland State University in Embedded Systems.
> 
>             I have started working on Xen Project and I am beginner in this field.
> 
>             I have followed all the steps which are given in this link –
> 
>             https://wiki.xenproject.org/wiki/Xen_ARM_with_Virtualization_Extensions/qemu-system-aarch64
> 
>             https://wiki.xenproject.org/wiki/Xen_ARM_with_Virtualization_Extensions#Building_Xen_on_ARM
> 
> 
>             1) I have used buildroot(rootfs.cpio) for building Linux.
> 
>             2) I have succeeded in booting Linux on Qemu (qemu-system-.aarch64)
> 
>             3) Used make dist-xen XEN_TARGET_ARCH=arm64 CROSS_COMPILE=aarch64-linux-gnu-  for cross compiling and
>             getting Xen binary.
> 
>             4) My root is root - root=/dev/sda1
> 
> 
>       May I ask why the root is different from the example in the wiki page? Are you using a different setup for the disk
>       (e.g no virtio)?
> 
> 
> 
>             After running the  last step UEFI Prompt opens and it gives me this error.
> 
> 
>       What do you mean? Which last step?
> 
> 
>             error: no such device: root.
> 
> 
>       This is coming from UEFI, right?
> 
> 
>             Press any key to continue...
>             EFI stub: Booting Linux Kernel...
> 
> 
>       This is booting Linux and not Xen. It is also trying to using ACPI rather than DT. Would it be possible for you to
>       drop to the UEFI shell and try to boot by hand?
> 
>             EFI stub: Using DTB from configuration table
>             EFI stub: Exiting boot services and installing virtual address map...
>             [   11.231789] acpi PNP0A08:00: Bus 0000:00 not present in PCI namespace
>             [   41.972816] NMI watchdog: BUG: soft lockup - CPU#1 stuck for 23s! [swapper/0:1]
>             [  229.940369] NMI watchdog: BUG: soft lockup - CPU#0 stuck for 23s! [swapper/0:1]
>             [  257.939966] NMI watchdog: BUG: soft lockup - CPU#0 stuck for 23s! [swapper/0:1]
>             [  290.035395] NMI watchdog: BUG: soft lockup - CPU#3 stuck for 23s! [swapper/0:1]
>             [  303.595373] kvm [1]: error: no compatible GIC node found
>             [  303.619405] kvm [1]: error initializing Hyp mode: -19
> 
>             I am unable to find the root cause of this issue. Please can anyone help me with this.
> 
> 
>       Cheers,
> 
>       --
>       Julien Grall
> 
> 
> 
> 

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Re: Query for running Xen on ARM

[Chaitanya Deshpande]

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Hi Stefano,

I have created W95 FAT32 partition as my first partition (Bootable) but
still I unable to see fs0: in the list.

Please find attached copy of the screen shot with this Email.

Please can you help me.

Thanks,
Chaitanya

On Tue, May 29, 2018 at 1:06 PM, Stefano Stabellini <sstabellini@kernel.org>
wrote:

> FS0: is mapped to the first partition on your disk, that needs to be
> formatted with the FAT filesystem. Do you have a FAT partition on your
> disk?
>
> On Tue, 29 May 2018, Chaitanya Deshpande wrote:
> > Hi Stefano, Julien,
> > I am able to solve that problem. Now the problem I am facing is my qemu
> is unable to find file system from EFI.
> >
> > Please find attached copy with this Email.
> >
> > No fs0: in mapping table. (Only BLK0: and BLK1:)
> >
> > Thanks,
> > Chaitanya
> >
> > On Tue, May 29, 2018 at 7:35 AM, Julien Grall <julien.grall@arm.com>
> wrote:
> >       (+Stefano)
> >
> >       On 27/05/18 18:48, Chaitanya Deshpande wrote:
> >             Hi,
> >
> >
> >       Hello Chaitanya,
> >
> >             I am Chaitanya, pursuing my master’s degree from Portland
> State University in Embedded Systems.
> >
> >             I have started working on Xen Project and I am beginner in
> this field.
> >
> >             I have followed all the steps which are given in this link –
> >
> >             https://wiki.xenproject.org/wiki/Xen_ARM_with_
> Virtualization_Extensions/qemu-system-aarch64
> >
> >             https://wiki.xenproject.org/wiki/Xen_ARM_with_
> Virtualization_Extensions#Building_Xen_on_ARM
> >
> >
> >             1) I have used buildroot(rootfs.cpio) for building Linux.
> >
> >             2) I have succeeded in booting Linux on Qemu
> (qemu-system-.aarch64)
> >
> >             3) Used make dist-xen XEN_TARGET_ARCH=arm64
> CROSS_COMPILE=aarch64-linux-gnu-  for cross compiling and
> >             getting Xen binary.
> >
> >             4) My root is root - root=/dev/sda1
> >
> >
> >       May I ask why the root is different from the example in the wiki
> page? Are you using a different setup for the disk
> >       (e.g no virtio)?
> >
> >
> >
> >             After running the  last step UEFI Prompt opens and it gives
> me this error.
> >
> >
> >       What do you mean? Which last step?
> >
> >
> >             error: no such device: root.
> >
> >
> >       This is coming from UEFI, right?
> >
> >
> >             Press any key to continue...
> >             EFI stub: Booting Linux Kernel...
> >
> >
> >       This is booting Linux and not Xen. It is also trying to using ACPI
> rather than DT. Would it be possible for you to
> >       drop to the UEFI shell and try to boot by hand?
> >
> >             EFI stub: Using DTB from configuration table
> >             EFI stub: Exiting boot services and installing virtual
> address map...
> >             [   11.231789] acpi PNP0A08:00: Bus 0000:00 not present in
> PCI namespace
> >             [   41.972816] NMI watchdog: BUG: soft lockup - CPU#1 stuck
> for 23s! [swapper/0:1]
> >             [  229.940369] NMI watchdog: BUG: soft lockup - CPU#0 stuck
> for 23s! [swapper/0:1]
> >             [  257.939966] NMI watchdog: BUG: soft lockup - CPU#0 stuck
> for 23s! [swapper/0:1]
> >             [  290.035395] NMI watchdog: BUG: soft lockup - CPU#3 stuck
> for 23s! [swapper/0:1]
> >             [  303.595373] kvm [1]: error: no compatible GIC node found
> >             [  303.619405] kvm [1]: error initializing Hyp mode: -19
> >
> >             I am unable to find the root cause of this issue. Please can
> anyone help me with this.
> >
> >
> >       Cheers,
> >
> >       --
> >       Julien Grall
> >
> >
> >
> >
>

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Re: Query for running Xen on ARM

[Stefano Stabellini]

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I am not sure what the problem is. I would compared your partition table
with a standard Linux distro UEFI image [1] to see if there are any
important differences. Checkout the UEFI spec [2] section 13.3.1 onward
to read the details of the partitions and filesystem requirements.

[1] https://cloud-images.ubuntu.com/xenial/current/xenial-server-cloudimg-arm64-uefi1.img
[2] http://www.uefi.org/sites/default/files/resources/UEFI%20Spec%202_7_A%20Sept%206.pdf#G17.1019485

On Tue, 29 May 2018, Chaitanya Deshpande wrote:
> Hi Stefano,
> 
> I have created W95 FAT32 partition as my first partition (Bootable) but still I unable to see fs0: in the list.
> 
> Please find attached copy of the screen shot with this Email.
> 
> Please can you help me.
> 
> Thanks,
> Chaitanya
> 
> On Tue, May 29, 2018 at 1:06 PM, Stefano Stabellini <sstabellini@kernel.org> wrote:
>       FS0: is mapped to the first partition on your disk, that needs to be
>       formatted with the FAT filesystem. Do you have a FAT partition on your
>       disk?
> 
>       On Tue, 29 May 2018, Chaitanya Deshpande wrote:
>       > Hi Stefano, Julien,
>       > I am able to solve that problem. Now the problem I am facing is my qemu is unable to find file system from EFI.
>       >
>       > Please find attached copy with this Email.
>       >
>       > No fs0: in mapping table. (Only BLK0: and BLK1:)
>       >
>       > Thanks,
>       > Chaitanya
>       >
>       > On Tue, May 29, 2018 at 7:35 AM, Julien Grall <julien.grall@arm.com> wrote:
>       >       (+Stefano)
>       >
>       >       On 27/05/18 18:48, Chaitanya Deshpande wrote:
>       >             Hi,
>       >
>       >
>       >       Hello Chaitanya,
>       >
>       >             I am Chaitanya, pursuing my master’s degree from Portland State University in Embedded Systems.
>       >
>       >             I have started working on Xen Project and I am beginner in this field.
>       >
>       >             I have followed all the steps which are given in this link –
>       >
>       >             https://wiki.xenproject.org/wiki/Xen_ARM_with_Virtualization_Extensions/qemu-system-aarch64
>       >
>       >             https://wiki.xenproject.org/wiki/Xen_ARM_with_Virtualization_Extensions#Building_Xen_on_ARM
>       >
>       >
>       >             1) I have used buildroot(rootfs.cpio) for building Linux.
>       >
>       >             2) I have succeeded in booting Linux on Qemu (qemu-system-.aarch64)
>       >
>       >             3) Used make dist-xen XEN_TARGET_ARCH=arm64 CROSS_COMPILE=aarch64-linux-gnu-  for cross compiling and
>       >             getting Xen binary.
>       >
>       >             4) My root is root - root=/dev/sda1
>       >
>       >
>       >       May I ask why the root is different from the example in the wiki page? Are you using a different setup for
>       the disk
>       >       (e.g no virtio)?
>       >
>       >
>       >
>       >             After running the  last step UEFI Prompt opens and it gives me this error.
>       >
>       >
>       >       What do you mean? Which last step?
>       >
>       >
>       >             error: no such device: root.
>       >
>       >
>       >       This is coming from UEFI, right?
>       >
>       >
>       >             Press any key to continue...
>       >             EFI stub: Booting Linux Kernel...
>       >
>       >
>       >       This is booting Linux and not Xen. It is also trying to using ACPI rather than DT. Would it be possible for
>       you to
>       >       drop to the UEFI shell and try to boot by hand?
>       >
>       >             EFI stub: Using DTB from configuration table
>       >             EFI stub: Exiting boot services and installing virtual address map...
>       >             [   11.231789] acpi PNP0A08:00: Bus 0000:00 not present in PCI namespace
>       >             [   41.972816] NMI watchdog: BUG: soft lockup - CPU#1 stuck for 23s! [swapper/0:1]
>       >             [  229.940369] NMI watchdog: BUG: soft lockup - CPU#0 stuck for 23s! [swapper/0:1]
>       >             [  257.939966] NMI watchdog: BUG: soft lockup - CPU#0 stuck for 23s! [swapper/0:1]
>       >             [  290.035395] NMI watchdog: BUG: soft lockup - CPU#3 stuck for 23s! [swapper/0:1]
>       >             [  303.595373] kvm [1]: error: no compatible GIC node found
>       >             [  303.619405] kvm [1]: error initializing Hyp mode: -19
>       >
>       >             I am unable to find the root cause of this issue. Please can anyone help me with this.
>       >
>       >
>       >       Cheers,
>       >
>       >       --
>       >       Julien Grall
>       >
>       >
>       >
>       >
> 
> 
> 
> 

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Re: Query for running Xen on ARM

[Julien Grall]

Hi,

On 05/30/2018 05:18 PM, Stefano Stabellini wrote:
> I am not sure what the problem is. I would compared your partition table
> with a standard Linux distro UEFI image [1] to see if there are any
> important differences. Checkout the UEFI spec [2] section 13.3.1 onward
> to read the details of the partitions and filesystem requirements.

I may have an idea of what's going on. Looking at the picture sent, The 
disk you show seems to be the one used by your Ubuntu running in 
VirtualBox. This seems to be confirmed by your previous e-mail where you 
mention sda1. Am I right?

You need to create that partition in the image used by QEMU. But likely 
this will already be there if you use a pre-built image (e.g ubuntu or 
else). I am assuming you were booting Linux using UEFI.

Cheers,

-- 
Julien Grall

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Re: Query for running Xen on ARM

[Chaitanya Deshpande]

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On Wed, May 30, 2018 at 9:44 AM, Julien Grall <julien.grall@arm.com> wrote:

> Hi,
>
> On 05/30/2018 05:18 PM, Stefano Stabellini wrote:
>
>> I am not sure what the problem is. I would compared your partition table
>> with a standard Linux distro UEFI image [1] to see if there are any
>> important differences. Checkout the UEFI spec [2] section 13.3.1 onward
>> to read the details of the partitions and filesystem requirements.
>>
>
> I may have an idea of what's going on. Looking at the picture sent, The
> disk you show seems to be the one used by your Ubuntu running in
> VirtualBox. This seems to be confirmed by your previous e-mail where you
> mention sda1. Am I right?
>
>    Chaitanya - Yes you are absolutely right. I have Virtualbox on which I
am running Ubuntu.  And I have sda1 disk (bootable) which is FAT32
   (1st partition for mapping fs0:).



> You need to create that partition in the image used by QEMU. But likely
> this will already be there if you use a pre-built image (e.g ubuntu or
> else). I am assuming you were booting Linux using UEFI.
>

  Chaitanya: I able to boot Linux through UEFI because I have root =
rootfs.cpio which I created from buildroot. And in config file of Linux I
have put INITRAMFS =        "rootfs.cpio" . So do you want me to give
root=/dev/sda1 while booting Linux on qemu?

>
> Cheers,
>
> --
> Julien Grall
>

Thanks,
Chaitanya

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Re: Query for running Xen on ARM

[Chaitanya Deshpande]

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Hi Stefano,

Sure. I will look into those documents. Thanks a lot.

Chaitanya

On Wed, May 30, 2018 at 9:18 AM, Stefano Stabellini <sstabellini@kernel.org>
wrote:

> I am not sure what the problem is. I would compared your partition table
> with a standard Linux distro UEFI image [1] to see if there are any
> important differences. Checkout the UEFI spec [2] section 13.3.1 onward
> to read the details of the partitions and filesystem requirements.
>
> [1] https://cloud-images.ubuntu.com/xenial/current/xenial-
> server-cloudimg-arm64-uefi1.img
> [2] http://www.uefi.org/sites/default/files/resources/UEFI%
> 20Spec%202_7_A%20Sept%206.pdf#G17.1019485
>
> On Tue, 29 May 2018, Chaitanya Deshpande wrote:
> > Hi Stefano,
> >
> > I have created W95 FAT32 partition as my first partition (Bootable) but
> still I unable to see fs0: in the list.
> >
> > Please find attached copy of the screen shot with this Email.
> >
> > Please can you help me.
> >
> > Thanks,
> > Chaitanya
> >
> > On Tue, May 29, 2018 at 1:06 PM, Stefano Stabellini <
> sstabellini@kernel.org> wrote:
> >       FS0: is mapped to the first partition on your disk, that needs to
> be
> >       formatted with the FAT filesystem. Do you have a FAT partition on
> your
> >       disk?
> >
> >       On Tue, 29 May 2018, Chaitanya Deshpande wrote:
> >       > Hi Stefano, Julien,
> >       > I am able to solve that problem. Now the problem I am facing is
> my qemu is unable to find file system from EFI.
> >       >
> >       > Please find attached copy with this Email.
> >       >
> >       > No fs0: in mapping table. (Only BLK0: and BLK1:)
> >       >
> >       > Thanks,
> >       > Chaitanya
> >       >
> >       > On Tue, May 29, 2018 at 7:35 AM, Julien Grall <
> julien.grall@arm.com> wrote:
> >       >       (+Stefano)
> >       >
> >       >       On 27/05/18 18:48, Chaitanya Deshpande wrote:
> >       >             Hi,
> >       >
> >       >
> >       >       Hello Chaitanya,
> >       >
> >       >             I am Chaitanya, pursuing my master’s degree from
> Portland State University in Embedded Systems.
> >       >
> >       >             I have started working on Xen Project and I am
> beginner in this field.
> >       >
> >       >             I have followed all the steps which are given in
> this link –
> >       >
> >       >             https://wiki.xenproject.org/wiki/Xen_ARM_with_
> Virtualization_Extensions/qemu-system-aarch64
> >       >
> >       >             https://wiki.xenproject.org/wiki/Xen_ARM_with_
> Virtualization_Extensions#Building_Xen_on_ARM
> >       >
> >       >
> >       >             1) I have used buildroot(rootfs.cpio) for building
> Linux.
> >       >
> >       >             2) I have succeeded in booting Linux on Qemu
> (qemu-system-.aarch64)
> >       >
> >       >             3) Used make dist-xen XEN_TARGET_ARCH=arm64
> CROSS_COMPILE=aarch64-linux-gnu-  for cross compiling and
> >       >             getting Xen binary.
> >       >
> >       >             4) My root is root - root=/dev/sda1
> >       >
> >       >
> >       >       May I ask why the root is different from the example in
> the wiki page? Are you using a different setup for
> >       the disk
> >       >       (e.g no virtio)?
> >       >
> >       >
> >       >
> >       >             After running the  last step UEFI Prompt opens and
> it gives me this error.
> >       >
> >       >
> >       >       What do you mean? Which last step?
> >       >
> >       >
> >       >             error: no such device: root.
> >       >
> >       >
> >       >       This is coming from UEFI, right?
> >       >
> >       >
> >       >             Press any key to continue...
> >       >             EFI stub: Booting Linux Kernel...
> >       >
> >       >
> >       >       This is booting Linux and not Xen. It is also trying to
> using ACPI rather than DT. Would it be possible for
> >       you to
> >       >       drop to the UEFI shell and try to boot by hand?
> >       >
> >       >             EFI stub: Using DTB from configuration table
> >       >             EFI stub: Exiting boot services and installing
> virtual address map...
> >       >             [   11.231789] acpi PNP0A08:00: Bus 0000:00 not
> present in PCI namespace
> >       >             [   41.972816] NMI watchdog: BUG: soft lockup -
> CPU#1 stuck for 23s! [swapper/0:1]
> >       >             [  229.940369] NMI watchdog: BUG: soft lockup -
> CPU#0 stuck for 23s! [swapper/0:1]
> >       >             [  257.939966] NMI watchdog: BUG: soft lockup -
> CPU#0 stuck for 23s! [swapper/0:1]
> >       >             [  290.035395] NMI watchdog: BUG: soft lockup -
> CPU#3 stuck for 23s! [swapper/0:1]
> >       >             [  303.595373] kvm [1]: error: no compatible GIC
> node found
> >       >             [  303.619405] kvm [1]: error initializing Hyp mode:
> -19
> >       >
> >       >             I am unable to find the root cause of this issue.
> Please can anyone help me with this.
> >       >
> >       >
> >       >       Cheers,
> >       >
> >       >       --
> >       >       Julien Grall
> >       >
> >       >
> >       >
> >       >
> >
> >
> >
> >
>

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