Re: [Xen-users] Booting Xen on qemu-arm

[Julien Grall <julien.grall@xxxxxxx>]

On 03/06/2019 13:22, Denis Obrezkov wrote:
> Hi Julien,
> > This maybe because Xen crashed before the console is setup. You can
> > compile Xen with earlyprintk.
> >
> > Can you provide the command line you use to build Xen?
> - UART enabled -
> - CPU 00000000 booting -
> - Xen starting in Hyp mode -
> - Zero BSS -
> - Setting up control registers -
> - Turning on paging -
> - Ready -
> (XEN) Checking for initrd in /chosen
> (XEN) RAM: 0000000040000000 - 000000005fffffff
> (XEN)
> (XEN) MODULE[0]: 0000000040000000 - 0000000040002000 Device Tree
> (XEN) MODULE[1]: 0000000045000000 - 0000000045853200 Kernel
> (XEN)  RESVD[0]: 0000000040000000 - 0000000040002000
> (XEN)
> (XEN) CMDLINE[0000000045000000]:chosen earlyprintk=serial,ttyAMA0
> console=ttyAMA0,115200n8 earlycon=xenboot
> (XEN)
> (XEN) Command line: console=dtuart dtuart=/pl011@9000000
> (XEN) Xen heap: 000000005e000000-0000000060000000 (8192 pages)
> (XEN) Dom heap: 122880 pages
> (XEN) Domain heap initialised
> (XEN) Booting using Device Tree
> (XEN)
> (XEN) ****************************************
> (XEN) Panic on CPU 0:
> (XEN) Unable to find compatible GIC in the device tree
> (XEN) ****************************************
> (XEN)
> (XEN) Reboot in five seconds...
>
> Though, there is a node from my device tree:
>
> intc@8000000 {
>          phandle = <0x00008001>;
>          interrupts = <0x00000001 0x00000009 0x00000004>;
>          reg = <0x00000000 0x08000000 0x00000000 0x00010000 0x00000000
> 0x080a0000 0x00000000 0x00f60000>;
>          #redistributor-regions = <0x00000001>;
>          compatible = "arm,gic-v3";
>          ranges;
>          #size-cells = <0x00000002>;
>          #address-cells = <0x00000002>;
>          interrupt-controller;
>          #interrupt-cells = <0x00000003>;
>      };
Which version of Xen are you using? Also what is the content of xen/.config?

> I trued to boot with gic_version=2, but also stuck:
I am not entirely sure if QEMU supports GICv2 virtualization. Stefano, do you 
remember?
> ...
>
> (XEN) GICv2: 288 lines, 1 cpu (IID 00000000).
> (XEN) Using scheduler: SMP Credit Scheduler rev2 (credit2)
> (XEN) Initializing Credit2 scheduler
>
> My guess that here might be a problem with Dom0.
It is too early for having a problem with Dom0. It is most likely due to the 
configuration of your GIC.
Cheers,

--
Julien Grall

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