Re: Automotive Grade Linux over xen issues.

[Bertrand Marquis <Bertrand.Marquis@xxxxxxx>]

Hi Arun,
(Putting back Xen-users in destination)

> On 18 May 2020, at 15:36, Arun K <arun.k@xxxxxxxxxxxxxxxxxxx> wrote:
> 
> Hi Bertrand,
> I have modified the xen source and  turned the "unhandled word write" into a 
> write_ignore.
> Now ICACTIVER4 error is not coming but it shows another error 
> 
> (XEN) d0v0: vGICD: unhandled write r4=ffffffff offset 0x000384
> (XEN) traps.c:2449:d0v0 HSR=0x93840047 pc=0xc05fa49c gva=0xf0800384 
> gpa=0x00000010481384.
>  
> Able to bring up the CPU successfully. but hangs here.
> 

You need to switch to a newer Xen version, 4.6 if far to old to be able to 
support you.
Also please stick with linux 4.19, Linux 3.10 is very very old

On my test I have xen master (but same is produced with 4.12) and Linux 5.4 
(but also tested with 4.19) and I see the warning but I boot properly:

[   33.065195] xenbr0: port 2(vif1.0) entered blocking state
[   33.070503] xenbr0: port 2(vif1.0) entered disabled state
[   33.076015] device vif1.0 entered promiscuous mode
root@n1sdp:~# (XEN) d1v0: vGICR: SGI: unhandled word write 0x000000ffffffff to 
ICACTIVER0
(XEN) d1v1: vGICR: SGI: unhandled word write 0x000000ffffffff to ICACTIVER0
(XEN) d1v2: vGICR: SGI: unhandled word write 0x000000ffffffff to ICACTIVER0
(XEN) d1v3: vGICR: SGI: unhandled word write 0x000000ffffffff to ICACTIVER0
(XEN) grant_table.c:1801:d1v1 Expanding d1 grant table from 1 to 2 frames
(XEN) grant_table.c:1801:d1v1 Expanding d1 grant table from 2 to 3 frames
(XEN) grant_table.c:1801:d1v1 Expanding d1 grant table from 3 to 4 frames
(XEN) grant_table.c:1801:d1v1 Expanding d1 grant table from 4 to 5 frames
[   34.646998] vif vif-1-0 vif1.0: Guest Rx ready
[   34.651356] IPv6: ADDRCONF(NETDEV_CHANGE): vi
f1.0: link becomroot@n1sdp:~# es ready
[   34.659358] xenbr0: port 2(vif1.0) entered blocking state
[   34.664793] xenbr0: port 2(vif1.0) entered forwarding state
(XEN) gnttab_mark_dirty not implemented yet

root@n1sdp:~# xl console stresstest
[    0.000000] Booting Linux on physical CPU 0x0000000000 [0x411fd0c0]
[    0.000000] Linux version 5.4.0-yocto-standard (oe-user@oe-host) (gcc 
version 9.3.0 (GCC)) #1 SMP PREEMPT Thu Mar 12 05:30:37 UTC 2020
[    0.000000] Machine model: XENVM-4.14
[    0.000000] Xen 4.14 support found
[    0.000000] efi: Getting EFI parameters from FDT:
[    0.000000] efi: UEFI not found.
[    0.000000] cma: Reserved 32 MiB at 0x00000000fdc00000
[    0.000000] NUMA: No NUMA configuration found
[    0.000000] NUMA: Faking a node at [mem 
0x0000000040000000-0x00000003bfffffff]
[    0.000000] NUMA: NODE_DATA [mem 0x3bebf2100-0x3bebf3fff]
[    0.000000] Zone ranges:
[    0.000000]   DMA32    [mem 0x0000000040000000-0x00000000ffffffff]
[    0.000000]   Normal   [mem 0x0000000100000000-0x00000003bfffffff]
[    0.000000]   Device   empty
[    0.000000] Movable zone start for each node
[    0.000000] Early memory node ranges
[    0.000000]   node   0: [mem 0x0000000040000000-0x00000000ffffffff]
[    0.000000]   node   0: [mem 0x0000000200000000-0x00000003bfffffff]
[    0.000000] Initmem setup node 0 [mem 0x0000000040000000-0x00000003bfffffff]
[    0.000000] psci: probing for conduit method from DT.
[    0.000000] psci: PSCIv1.1 detected in firmware.
[    0.000000] psci: Using standard PSCI v0.2 function IDs
[    0.000000] psci: Trusted OS migration not required
[    0.000000] psci: SMC Calling Convention v1.1


Bertrand

> 
> 
> 
> 
> On Mon, May 18, 2020 at 1:09 PM Bertrand Marquis <Bertrand.Marquis@xxxxxxx> 
> wrote:
> Hi Arun,
> 
> > On 11 May 2020, at 05:55, Arun K <arun.k@xxxxxxxxxxxxxxxxxxx> wrote:
> >
> > Hi,
> >
> > Myself Arun working as a lead engineer at pathpartner technologies.
> > Currently i am working on odroid xu4 with xen. I am trying to install 
> > Automotive Grade Linux (AGL) on odroid xu4 as dom0.
> > AGL has a kernel version of 4.19 and which is ported to the odroid xu4 and 
> > booted successfully.But while trying to run it over xen it shows error 
> > "d0v0: vGICD: unhandled word write 0xffffffff to ICACTIVER4". Then I tried 
> > lowering the kernel versions to 3.10 which has xen odroid support but has 
> > some issues with the AGL filesystem. tuning the AGL fs i am able to reach 
> > at login prompt but failed to login successfully.
> 
> This is a warning that you can ignore.
> 
> > My xen version is 4.6. .
> 
> I would highly suggest to upgrade to a newer version of Xen.
> 
> >
> > Can you please suggest a solution to overcome this issue.
> 
> The message is in fact a warning that some register accessed by Linux is not 
> properly emulated by Xen.
> In your version of Linux the register is not used by Linux out of boot phase 
> so you can safely ignore the warning.
> 
> Regards
> Bertrand
> 
> >
> > --
> > Thanks and Regards
> > Arun K
> > Lead Engineer
> > Pathpartner
> >
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> 
> -- 
> Thanks and Regards
> Arun K 
> Lead Engineer
> Pathpartner 
> 
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