Re: [Xen-users] How to boot domU and dom0 from a device tree

[Denis Obrezkov <denisobrezkov@xxxxxxxxx>]

Hi,
I have problems with domU console:
(XEN) Cannot send chars to Dom1: no UART available

this is a part of fdt command for domU:
fdt mknod /chosen/domU1 vpl011
fdt mknod /chosen/domU1 module@0
fdt set /chosen/domU1/module@0 compatible "multiboot,kernel" "multiboot,module"
fdt set /chosen/domU1/module@0 reg <0x53000000 0x1281a00>
fdt set /chosen/domU1/module@0 bootargs "rw root=/dev/ram
rdinit=/sbin/init console=hvc1"

fdt mknod /chosen/domU1 module@1
fdt set /chosen/domU1/module@1 compatible "multiboot,ramdisk" "multiboot,module"
fdt set /chosen/domU1/module@1 reg <0x58000000 0x121e65>

instead of hvc1 in console=hvc1 I tried hvc0, ttyS0 and ttyAMA0.
ср, 12 июн. 2019 г. в 12:18, Julien Grall <julien.grall@xxxxxxx>:
>
> Hi,
>
> On 11/06/2019 21:23, Denis Obrezkov wrote:
> > I agree I just don't know the right way for attachments on MLs
>
> Text file are commonly posted on pastebin like website and then linked in the
> thread. For bigger/binary files, you can either use google driver or upload to
> your own website (if you have own).
>
> Cheers,
>
> >
> > On 6/11/19 9:48 PM, Julien Grall wrote:
> >>
> >>
> >> On 11/06/2019 20:02, Denis Obrezkov wrote:
> >>> It seems I can't attach big files in xen mailing list, here the images 
> >>> are:
> >>> https://drive.google.com/file/d/1yhVQhqa0HQr8tOYIpr9FXPXPw-65vibN/view?usp=sharing
> >>
> >> Sending any attachment on the ML is strongly not recommended. Anything,
> >> you send as an attachment will be stored in the mail account of each
> >> person subscribed on the ML.
> >>
> >> To give an example, your attachment is 9MB in total (compress), if you
> >> had only 1024 users subscribed, this would mean 9G of disk used...
> >>
> >> Cheers,
> >>
> >>>
> >>> On 6/11/19 8:20 PM, Denis Obrezkov wrote:
> >>>> Ok,
> >>>> Linux 4.20.11
> >>>> xen 4.12.0
> >>>>
> >>>> Their configs are default (defconfig for Linux).
> >>>>
> >>>> maybe I should use a newer kernel.
> >>>> I will try it soon.
> >>>>
> >>>> On 6/11/19 6:09 PM, Stefano Stabellini wrote:
> >>>>> Hi Denis,
> >>>>>
> >>>>> I cannot spot anything wrong looking at the device tree configuration.
> >>>>> Could you please provide:
> >>>>>
> >>>>> - the original device tree
> >>>>> - all the binaries, including Xen, Linux, ramdisks
> >>>>> - the exact version of Xen and Linux you used
> >>>>> - the Xen and Linux kconfig (xen/.config for Xen and .config for Linux)
> >>>>> - the QEMU command line (if you are using QEMU)
> >>>>>
> >>>>> I'll try to repro the issue here.
> >>>>>
> >>>>>
> >>>>> On Tue, 11 Jun 2019, Denis Obrezkov wrote:
> >>>>>> Hi,
> >>>>>>
> >>>>>> I don't think it's the memory issue:
> >>>>>>
> >>>>>> (XEN) *** Serial input to DOM0 (type 'CTRL-a' three times to switch 
> >>>>>> input)
> >>>>>> (XEN) *** LOADING DOMU cpus=1 memory=a00000KB ***
> >>>>>> (XEN) Loading Domd1 kernel from boot module @ 0000000043000000
> >>>>>> (XEN) Loading ramdisk from boot module @ 0000000048000000
> >>>>>> (XEN)
> >>>>>> (XEN) ****************************************
> >>>>>> (XEN) Panic on CPU 0:
> >>>>>> (XEN) Out of memory
> >>>>>> (XEN) ****************************************
> >>>>>> (XEN)
> >>>>>> (XEN) Reboot in five seconds...
> >>>>>>
> >>>>>> On 6/11/19 2:57 PM, Julien Grall wrote:
> >>>>>>> On 10/06/2019 22:24, Denis Obrezkov wrote:
> >>>>>>>
> >>>>>>> Hi Denis,
> >>>>>>>
> >>>>>>>> On 6/10/19 10:30 PM, Stefano Stabellini wrote:
> >>>>>>>>> On Mon, 10 Jun 2019, Denis Obrezkov wrote:
> >>>>>>>>>> Also, I found out how to pass the amount of memory for dom0. And I
> >>>>>>>>>> passed 256M. And I can see that in a device tree there is a memory 
> >>>>>>>>>> node
> >>>>>>>>>> with 4096M allocated. So, I don't understand why I have this error:
> >>>>>>>>>
> >>>>>>>>> This is easy, the answer is below.
> >>>>>>>>>
> >>>>>>>>>
> >>>>>>>>>> (XEN) *** LOADING DOMAIN 0 ***
> >>>>>>>>>> (XEN) Loading Domd0 kernel from boot module @ 0000000047000000
> >>>>>>>>>> (XEN) Loading ramdisk from boot module @ 0000000042000000
> >>>>>>>>>> (XEN) Allocating 1:1 mappings totalling 256MB for dom0:
> >>>>>>>>>> (XEN) BANK[0] 0x00000050000000-0x00000060000000 (256MB)
> >>>>>>>>>> (XEN) Grant table range: 0x00000049000000-0x00000049040000
> >>>>>>>>>> (XEN) Allocating PPI 16 for event channel interrupt
> >>>>>>>>>> (XEN) Loading zImage from 0000000138000000 to
> >>>>>>>>>> 0000000050080000-00000000512d1a00
> >>>>>>>>>> (XEN) Loading dom0 initrd from 0000000042000000 to
> >>>>>>>>>> 0x0000000058200000-0x000000005831b680
> >>>>>>>>>> (XEN) Loading dom0 DTB to 0x0000000058000000-0x0000000058001da8
> >>>>>>>>>> (XEN) Initial low memory virq threshold set at 0x4000 pages.
> >>>>>>>>>> (XEN) Scrubbing Free RAM in background
> >>>>>>>>>> (XEN) Std. Loglevel: Errors and warnings
> >>>>>>>>>> (XEN) Guest Loglevel: Nothing (Rate-limited: Errors and warnings)
> >>>>>>>>>> (XEN) ***************************************************
> >>>>>>>>>> (XEN) No support for ARM_SMCCC_ARCH_WORKAROUND_1.
> >>>>>>>>>> (XEN) Please update your firmware.
> >>>>>>>>>> (XEN) ***************************************************
> >>>>>>>>>> (XEN) 3... 2... 1...
> >>>>>>>>>> (XEN) *** Serial input to DOM0 (type 'CTRL-a' three times to switch
> >>>>>>>>>> input)
> >>>>>>>>>> (XEN) *** LOADING DOMU cpus=1 memory=140000KB ***
> >>>>>>>>>> (XEN) Loading Domd1 kernel from boot module @ 0000000043000000
> >>>>>>>>>> (XEN) Loading ramdisk from boot module @ 0000000048000000
> >>>>>>>>>> (XEN)
> >>>>>>>>>> (XEN) ****************************************
> >>>>>>>>>> (XEN) Panic on CPU 0:
> >>>>>>>>>> (XEN) Out of memory
> >>>>>>>>>> (XEN) ****************************************
> >>>>>>>>>> (XEN)
> >>>>>>>>>> (XEN) Reboot in five seconds...
> >>>>>>>>>>
> >>>>>>>>>> fdt commands passed via u-boot:
> >>>>>>>>>>
> >>>>>>>>>> setenv xen_bootargs 'dom0_mem=256M'
> >>>>>>>>>
> >>>>>>>>> You just need to give more memory to dom0. Use dom0_mem=1G or 
> >>>>>>>>> something
> >>>>>>>>> like that for a start.
> >>>>>>>> But as far as I understand domU doesn't have enough memory and
> >>>>>>>> fails.     I
> >>>>>>>> change dom0_mem to 1G but the problem still exists.
> >>>>>>>
> >>>>>>> You are right, the problem is from DomU not Dom0...
> >>>>>>>
> >>>>>>>>>
> >>>>>>>>>
> >>>>>>>>>> fdt addr 0x44000000
> >>>>>>>>>> fdt resize
> >>>>>>>>>> fdt set /chosen \#address-cells <1>
> >>>>>>>>>> fdt set /chosen \#size-cells <1>
> >>>>>>>>>> fdt set /chosen xen,xen-bootargs \"$xen_bootargs\"
> >>>>>>>>>> fdt mknod /chosen module@0
> >>>>>>>>>> fdt set /chosen/module@0 compatible "xen,linux-zimage"
> >>>>>>>>>> "xen,multiboot-module"
> >>>>>>>>>> fdt set /chosen/module@0 reg <0x47000000 0x7cc561>
> >>>>>>>>>> fdt set /chosen/module@0 bootargs "rw root=/dev/ram 
> >>>>>>>>>> rdinit=/sbin/init
> >>>>>>>>>> earlyprintk=serial,ttyAMA0 console=hvc0 earlycon=xenboot"
> >>>>>>>>>> fdt mknod /chosen module@1
> >>>>>>>>>> fdt set /chosen/module@1 compatible "xen,linux-initrd"
> >>>>>>>>>> "xen,multiboot-module"
> >>>>>>>>>> fdt set /chosen/module@1 reg <0x42000000 0x11b680>
> >>>>>>>>>>
> >>>>>>>>>> fdt mknod /chosen domU1
> >>>>>>>>>> fdt set /chosen/domU1 compatible "xen,domain"
> >>>>>>>>>> fdt set /chosen/domU1 \#address-cells <1>
> >>>>>>>>>> fdt set /chosen/domU1 \#size-cells <1>
> >>>>>>>>>> fdt set /chosen/domU1 \cpus <1>
> >>>>>>>>>> fdt set /chosen/domU1 \memory <0 1310720>
> >>>>>>>
> >>>>>>> ... this property is used to tell how much memory the guest domU1 
> >>>>>>> has. I
> >>>>>>> am a bit surprised that 136MB of RAM is not enough, but you could try 
> >>>>>>> to
> >>>>>>> bump it to 512MB or even 1GB and see.
> >>>>>>>
> >>>>>>> Cheers,
> >>>>>>>
> >>>>>>
> >>>>>> --
> >>>>>> Regards, Denis Obrezkov
> >>>>>>
> >>>>
> >>>
> >>
> >
>
> --
> Julien Grall

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