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


  • To: Stefano Stabellini <sstabellini@xxxxxxxxxx>
  • From: Denis Obrezkov <denisobrezkov@xxxxxxxxx>
  • Date: Mon, 10 Jun 2019 23:24:31 +0200
  • Autocrypt: addr=denisobrezkov@xxxxxxxxx; prefer-encrypt=mutual; keydata= mQMuBFrAxPQRCAD59CJNd5LF1VmojUBpdr/bJ2TaKC7SW4ln7+PWn+QyAJfFOVFlTRIDsAlP 65y7CacXFCXmLTACo4a7HEhRb5787kPm6rc30zpL+04uXCeTruYZi0ZnQVXOiab/qy3aMsk0 6n9hMY28TSbM9nynnlrbg9pGkb1EiFVNsowJjFSKXa3Rpogte9qxfXmLf2eV0MZNnrmq6Kb2 8ri5/Ffh5DG1CsN/dkv8n1kw2QqMM2RT+ZS57D+yCehtw355EXSVh2r+GsXAqMinOexcdYI4 skvvP84OovRMnlJhmRdnbjO+QFiOVeLUj7WHMT3AbClaBlUuHkbFi9HLBHAiu6uMrNtzAQD9 KoM6SXbuvlhCq2v78dGkex9EgaA7CSnBcNXuUdrjYQf+MsZgI7oDihT6TUBO0IDQL+qSrozs /hHV+HhWtc5+SYTsHXxnTkcVe12vR0uPw3fFUuncWnMRzHivKZC2ZF/w3LJL/nGzguAoPa9e VghM38EP49yO6ESthD4WvELMy2+zPkMiUqilMfxOl370RXxEBUIzFSpP6oqvNq7fvThGTQah mrFhflGSyMHXk75VkCiY+cbrMeB9xG7H3nlbQ9fYVCOPejnt8gImeazdIghQh1tjbNpjQhy8 50klCowN5H+gaSZsy4K7jlJ1UNFz/vWCvlr3W8o4tA6EoJ4tjJV2HXcrUBPYLwkruKnv8QJM vyVj5an6Sfuwt/AmFEOKo1QJnAf+Oi47RrOmec8lXS/06TMn7z6krmuRul03HXayCtREqMyY VCf87oMpPYYnFJolDrSB8kCSZRn2aixzHl4IIGa9RVuywChzUvgZJbFGPFR+Qz1BK9Ltl7FC rQcuAqg3A2RJ7uoTNiZDfI0tKWm8BEUe5LqZqgFTkTkuV9D6UveYnDk2zUFGlDTguagW2XWI wiGaA9Ud7UBBlQGTZUwNGahAErUHI5gDSNfWEUaRBEccWKgddK3a/NhkxOveqDWWFcAt4K/g JOqBs+7Bm0RjQa+4EAP6gFx4098XBZP9ff6pPuFWRN6fvfdBDUMHqb3i2SGDWVPrRR/x+Iz/ yfjdWlC/87QoRGVuaXMgT2JyZXprb3YgPGRlbmlzb2JyZXprb3ZAZ21haWwuY29tPoiWBBMR CAA+FiEExuZY9Y+VSLigQ/5M+4kLEySe7PkFAlrAxPQCGyMFCQWjmoAFCwkIBwIGFQgJCgsC BBYCAwECHgECF4AACgkQ+4kLEySe7PleSQEAktULi71pVGKh0vykq0wrn6IyqXx1SLFNwLcr PnZ2N5gA/3Ipzf3vXWXWCwRR07BB/H+9XgqWRl3jsu5EL9TzmyFAuQINBFrAxPQQCADaIOKd +PPUX4GvjdLikKxHsFRRpk75LiFZJcFU8cCA0M4Dg/Q0LcSX82TfgrfU34y7/rrF4ig/Dj81 H8MB2u01lYA2QpQ/XdHfwFMxkj5FCB4Cq6EqGxsXsaRhw4Qu3ouiJiHCEeoMoloBLOlqpXBf qnJSnBXYJDnlyvxoFIVpX4l+q2xJk/877otbPK5TBYdeHQv/f7cWNxIUT5Feth9DVq4B9OG1 BgOA1gH13KUmWhMaO+k/rYCJd9UiRoGm7FihyWrsRnG5K6VNnLjwjMjxDukNxdlITVbeK5/E QaiKRGRcTp3OwfHy6HlQH/JXGGyfmEx0rKVjoW/DD76MPpk/AAMFB/0SBNOW9asG5HeRKhJm QOPJDwNQik4t8uuZb7mw6+QoQuyzMBkXvhL7Aud0OluPeSYL2jZPw2IB26gvlUVva+FJRW9X 7cInI5mnuB4HBGdNpzR+ngRzFyf+qsd6cUrrioQUQozQKCgKG/J2LimV1fC4hQW0n5Q0qM9I KX3PtRCgxItQbn/HdqkTXqv8oxDB9cQILJvIYDZnVLojB4rJFUNb397ao3qaXdXj3iaX6wwJ 2Oo3cSxMGdY/8grRTDGYjItpWEM2noIRzdWSybzavtLHu/LmG4rbgy2aNm/TiVp28G5KvWW/ fCLomZhN0JscRgSkYjSaxmMgEdks1h9DWTHkiH4EGBEIACYWIQTG5lj1j5VIuKBD/kz7iQsT JJ7s+QUCWsDE9AIbDAUJBaOagAAKCRD7iQsTJJ7s+UF2AQDqHEO2tekVMTWJa3SakIM5FJjk sao+JkzbKe0vDy4ecwEAukGaHvmKxMZsUOOjDWjDe4eV+aRTVjUjY7LAl3OJkiU=
  • Cc: Iain Hunter <drhunter95@xxxxxxxxx>, Julien Grall <julien.grall@xxxxxxx>, Hunyue Yau <hy-gsoc@xxxxxxxxxxxxxxx>, xen-users@xxxxxxxxxxxxxxxxxxxx
  • Delivery-date: Mon, 10 Jun 2019 21:25:56 +0000
  • List-id: Xen user discussion <xen-users.lists.xenproject.org>
  • Openpgp: preference=signencrypt

Hi,

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.
> 
> 
>> 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>
>>
>> fdt mknod /chosen/domU1 module@0
>> fdt set /chosen/domU1/module@0 compatible "multiboot,kernel"
>> "multiboot,module"
>> fdt set /chosen/domU1/module@0 reg <0x43000000 0x7cc561>
>> fdt set /chosen/domU1/module@0 bootargs "rw root=/dev/ram
>> rdinit=/sbin/init console=hvc0 earlycon=xenboot"
>>
>> fdt mknod /chosen/domU1 module@1
>> fdt set /chosen/domU1/module@1 compatible "multiboot,ramdisk"
>> "multiboot,module"
>> fdt set /chosen/domU1/module@1 reg <0x48000000 0x11b680>
>>
>> booti 0x49000000 - 0x44000000
>>
>> On 6/10/19 2:24 PM, Denis Obrezkov wrote:
>>> I found out that I can get rid of that error if I load the same image to
>>> another address space with -device loader. But then I get the error:
>>> (XEN) ***************************************************
>>> (XEN) PLEASE SPECIFY dom0_mem PARAMETER - USING 512M FOR NOW
>>> (XEN) ***************************************************
>>> (XEN) 3... 2... 1...
>>> (XEN) *** Serial input to DOM0 (type 'CTRL-a' three times to switch input)
>>> (XEN) *** LOADING DOMU cpus=1 memory=200000KB ***
>>> (XEN) Loading Domd1 kernel from boot module @ 0000000043000000
>>> (XEN) Loading ramdisk from boot module @ 0000000042000000
>>> (XEN)
>>> (XEN) ****************************************
>>> (XEN) Panic on CPU 0:
>>> (XEN) Out of memory
>>> (XEN) ****************************************
>>> (XEN)
>>> (XEN) Reboot in five seconds...
>>>
>>> So, I don't understand how xen distribute the allocated memory and how
>>> can it be allocated via a device tree.
>>>
>>> On 6/10/19 12:09 PM, Denis Obrezkov wrote:
>>>> Hello,
>>>>
>>>> I  am trying to boot domU from a device tree. I want to use the same
>>>> ramdisk and kernel image as for dom0. These are my u-boot commands:
>>>>
>>>> fdt addr 0x44000000
>>>> fdt resize
>>>> fdt set /chosen \#address-cells <1>
>>>> fdt set /chosen \#size-cells <1>
>>>> 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 mknod /chosen/domU1 module@0
>>>> fdt set /chosen/domU1/module@0 compatible "xen,linux-zimage"
>>>> "xen,multiboot-module"
>>>> fdt set /chosen/domU1/module@0 reg <0x47000000 0x7cc561>
>>>> fdt set /chosen/domU1/module@0 bootargs "rw root=/dev/ram
>>>> rdinit=/sbin/init console=hvc0 earlycon=xenboot"
>>>>
>>>> fdt mknod /chosen/domU1 module@1
>>>> fdt set /chosen/domU1/module@1 compatible "xen,linux-initrd"
>>>> "xen,multiboot-module"
>>>> fdt set /chosen/domU1/module@1 reg <0x42000000 0x11b680>
>>>>
>>>> booti 0x49000000 - 0x44000000
>>>>
>>>> I got: 
>>>>
>>>> ....
>>>>
>>>> (XEN) *** LOADING DOMAIN 0 ***
>>>> (XEN) Missing kernel boot module?
>>>> (XEN)
>>>> (XEN) ****************************************
>>>> (XEN) Panic on CPU 0:
>>>> (XEN) Could not set up DOM0 guest OS
>>>> (XEN) ****************************************
>>>> (XEN)
>>>> (XEN) Reboot in five seconds...
>>>>
>>>> I wasn't able to find instructions on how to run domU and dom0 images
>>>> simultaneously.
>>>>
>>>
>>
>> -- 
>> Regards, Denis Obrezkov
>>

-- 
Regards, Denis Obrezkov

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