How to enable Guest Linux VM on Raspberry PI3?
Lei Zhou
lezhou at blackberry.com
Wed Jun 12 01:10:29 CEST 2019
Hi Adam,
I built Fiasco/L4Re and L4Linux vmlinuz, my own ramdisk-armv7.cpio.gz.
This is my l4linux.cfg content:
==============================================
-- vim:set ft=lua:
local L4 = require("L4");
L4.default_loader:start({ log = L4.Env.log:m("rws"), },
"rom/vmlinuz mem=64M console=ttyLv0 " ..
"l4x_rd=rom/ramdisk-armv7.cpio.gz" .. L4.Info.arch() .. ".rd "
.. "root=1:0 ramdisk_size=4000 init=/bin/sh");
=====================================================
This is my module.list:
entry L4Linux-rpi3
roottask moe rom/l4linux.cfg
module l4linux.cfg
module l4re
module ned
module vmlinuz
module ramdisk-armv7.cpio.gz
=======================================================
I made final bootstrap_L4Linux-rpi3.uimage.
=====================================================
After Rpi3 booted up, it stopped at NED exception and hangs! And log is pasted as below:
[0:20000000;ffffffff]
MOE: Hello world
MOE: found 501008 KByte free memory
MOE: found RAM from 54000 to 1f000000
MOE: allocated 495 KByte for the page array @0x55000
MOE: virtual user address space [0-bfffffff]
MOE: rom name space cap -> [C:103000]
MOE: rwfs name space cap -> [C:105000]
BOOTFS: [1100000-1100147] [C:107000] l4linux.cfg
BOOTFS: [1101000-11164f0] [C:109000] l4re
BOOTFS: [1117000-117876c] [C:10b000] ned
BOOTFS: [1179000-15ac4d0] [C:10d000] vmlinuz
BOOTFS: [15ad000-1717400] [C:10f000] ramdisk-armv7.cpio.gz
MOE: cmdline: moe rom/l4linux.cfg
MOE: Starting: rom/ned rom/l4linux.cfg
MOE: loading 'rom/ned'
Ned says: Hi World!
L4Re: rom/ned: Unhandled exception: PC=0x102cb30 PFA=20a960 LdrFlgs=0
========================================================
$arm-***-objdump -ldSC ned // gives following disassembly at above PC:
102cb1c: e1a00004 mov r0, r4
102cb20: e34f1ff0 movt r1, #65520 ; 0xfff0
102cb24: e30c825c movw r8, #49756 ; 0xc25c
102cb28: ebffa155 bl 1015084 <lua_rawsetp(lua_State*, int, void const*)>
102cb2c: ed9f0b71 vldr d0, [pc, #452] ; 102ccf8 <luaopen_package(lua_State*)+0x24c>
102cb30: e1a00004 mov r0, r4
102cb34: e3a01088 mov r1, #136 ; 0x88
102cb38: e3406102 movt r6, #258 ; 0x102
102cb3c: ebffe4f1 bl 1025f08 <luaL_checkversion_(lua_State*, double, unsigned int)>
=====================================================
Can you please help me? or get me familiar with how to debug on the L4Re system?
Much appreciated!
Lei
________________________________________
From: Lei Zhou
Sent: Friday, June 07, 2019 5:34 PM
To: Adam Lackorzynski; l4-hackers at os.inf.tu-dresden.de
Subject: RE: How to enable Guest Linux VM on Raspberry PI3?
Thanks Adam & Jakub for your promptly support.
1> I will experiment L4Linux on my Raspberry PI3 to get guest Linux VM up.
2> Yes, after I sycned to lastest <kernkonzept> code base and was able to make Linux VM upworking on the QEMU virtual ARM platform. Was using the source code from https://svn.l4re.org/repos/oc/l4re/. Seems they are not exactly the same.
Have a great weekend!
Lei
________________________________________
From: l4-hackers [l4-hackers-bounces at os.inf.tu-dresden.de] on behalf of Adam Lackorzynski [adam at os.inf.tu-dresden.de]
Sent: Friday, June 07, 2019 3:54 PM
To: l4-hackers at os.inf.tu-dresden.de
Subject: Re: How to enable Guest Linux VM on Raspberry PI3?
On Fri Jun 07, 2019 at 18:27:18 +0000, Lei Zhou wrote:
> After I brought up L4Re and Fiasco on Raspberry PI3, would like to enable guest Linux VM on top of it.
>
> I'm looking at the link https://urldefense.proofpoint.com/v2/url?u=https-3A__github.com_kernkonzept_manifest_wiki_LinuxVM&d=DwICAg&c=yzoHOc_ZK-sxl-kfGNSEvlJYanssXN3q-lhj0sp26wE&r=zgPsMwBitHoKyTzLULGKGmtjlsV9d0M7_KqUo-WYeMg&m=VXUaQ18nPG5EFxWsPyMuOEWiVIUJi6NK5XgzyKn7IqM&s=2xhsd-rfRCHenVuPfjY7zmNW0FLbQ0Da6Io2gb_UuD4&e= and hoping I can do the same thing on Raspberry PI3.
>
> The link seems using hardware-assisted virtualization option uvmm based for guest VM. There seems also L4Linux Paravirtualization option. Which option should I use for me to enable guest LInux VM on Raspberry PI3?
You can only use L4Linux as the Raspberries do not support
hardware-assisted virtualization (because they have the wrong interrupt
controller).
Adam
> In addition, when I followed the link to try on QEMU first, encounter some "vbus" capability issue. I followed the guidance exactly as the link says. However, when I started the command to spawning the Linux VM as:
> $make E=uvmm-basic qemu
>
> It failed with following log:
>
> ============================================
> MOE: virtual user address space [0-7fffffffff]
> MOE: rom name space cap -> [C:103000]
> MOE: rwfs name space cap -> [C:105000]
> BOOTFS: [41100000-411974b8] [C:107000] uvmm
> BOOTFS: [41198000-411c4e58] [C:109000] l4re
> BOOTFS: [411c5000-41246770] [C:10b000] ned
> BOOTFS: [41247000-412475c4] [C:10d000] virt-arm_virt.dtb
> BOOTFS: [41248000-41430200] [C:10f000] ramdisk-armv8.cpio.gz
> BOOTFS: [41431000-41431242] [C:111000] uvmm-basic.ned
> BOOTFS: [41432000-42618a00] [C:113000] Image.gz
> MOE: cmdline: moe rom/uvmm-basic.ned
> MOE: Starting: rom/ned rom/uvmm-basic.ned
> MOE: loading 'rom/ned'
> Ned says: Hi World!
> Ned: loading file: 'rom/uvmm-basic.ned'
> VMM[vmbus]: 'vbus' capability not found. Hardware access not possible for VM.
> VMM[main]: Hello out there.
> VMM: FATAL: ERROR: ARM GIC virtualization does not work without passing the virtual GICC via the vbus
> VMM[vm]: Device creation for virtual device virtio_uart at 20000 failed. Disabling device.
> VMM[]: virtio_net at 10000.l4vmm,virtiocap: capability net is invalid.
> VMM[vm]: Device creation for virtual device virtio_net at 10000 failed. Disabling device.
> VMM: FATAL: ERROR: ARM GIC virtualization does not work without passing the virtual GICC via the vbus
> VMM[vm]: Device creation for virtual device interrupt-controller failed. Disabling device.
> VMM: FATAL: Parsing timer interrupt: Argument out of range
> qemu-system-aarch64: terminating on signal 2
> Makefile:6: recipe for target 'do-all-make-goals' failed
> make: *** [do-all-make-goals] Interrupt
> =========================================================================
>
> Any feedbacks are greatly appreciated!
> Lei Zhou
>
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