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Re: [Xen-users] How to build Mini-OS for ARM
Hi,
I got an error: Starting kernel ...
Xen 4.12.0
(XEN) Xen version 4.12.0 (denis@) (aarch64-linux-gnu-gcc (Ubuntu/Linaro 7.4.0-1ubuntu1~18.04) 7.4.0) debug=n Wed Jun 5 14:57:33 CEST 2019
(XEN) Latest ChangeSet:
(XEN) Processor: 411fd070: "ARM Limited", variant: 0x1, part 0xd07, rev 0x0
(XEN) 64-bit Execution:
(XEN) Processor Features: 0000000001000222 0000000000000000
(XEN) Exception Levels: EL3:No EL2:64+32 EL1:64+32 EL0:64+32
(XEN) Extensions: FloatingPoint AdvancedSIMD GICv3-SysReg
(XEN) Debug Features: 0000000010305106 0000000000000000
(XEN) Auxiliary Features: 0000000000000000 0000000000000000
(XEN) Memory Model Features: 0000000000001124 0000000000000000
(XEN) ISA Features: 0000000000011120 0000000000000000
(XEN) 32-bit Execution:
(XEN) Processor Features: 00000131:10011001
(XEN) Instruction Sets: AArch32 A32 Thumb Thumb-2 Jazelle
(XEN) Extensions: GenericTimer
(XEN) Debug Features: 03010066
(XEN) Auxiliary Features: 00000000
(XEN) Memory Model Features: 10101105 40000000 01260000 02102211
(XEN) ISA Features: 02101110 13112111 21232042 01112131 00011142 00011121
(XEN) Generic Timer IRQ: phys=30 hyp=26 virt=27 Freq: 62500 KHz
(XEN) GICv3 initialization:
(XEN) gic_dist_addr=0x00000008000000
(XEN) gic_maintenance_irq=25
(XEN) gic_rdist_stride=0
(XEN) gic_rdist_regions=1
(XEN) redistributor regions:
(XEN) - region 0: 0x000000080a0000 - 0x00000009000000
(XEN) GICv3: 256 lines, (IID 0000043b).
(XEN) GICv3: CPU0: Found redistributor in region 0 @000000004001c000
(XEN) Using scheduler: SMP Credit Scheduler rev2 (credit2)
(XEN) Initializing Credit2 scheduler
(XEN) Allocated console ring of 16 KiB.
(XEN) Bringing up CPU1
(XEN) GICv3: CPU1: Found redistributor in region 0 @000000004003c000
(XEN) Bringing up CPU2
(XEN) GICv3: CPU2: Found redistributor in region 0 @000000004005c000
(XEN) Bringing up CPU3
(XEN) GICv3: CPU3: Found redistributor in region 0 @000000004007c000
(XEN) Brought up 4 CPUs
(XEN) P2M: 44-bit IPA with 44-bit PA and 8-bit VMID
(XEN) P2M: 4 levels with order-0 root, VTCR 0x80043594
(XEN) I/O virtualisation disabled
(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 configured Linux with defconfig and on wiki-page I can see: In general the same kernel configuration as used to boot natively,
plus turning on the Xen specific options should work. A good starting
point is often the "multi_v7_defconfig" + Xen options.
but what are those Xen options?
Thank you, I'll give it a try today.
On Tue, 4 Jun 2019, Denis Obrezkov wrote:
> Hi,
>
> > Where does it hang exactly? I don't use QEMU with a debugger often, but
> > you can connect gdb to QEMU if that's what you'd like to do. Normally, I
> > just add enough printks to Xen to figure out where it gets stuck. It is
> > pretty easy because if it's an early boot hang, then it is still all
> > single threaded and easy to follow.
>
> I wrote it in another thread. When I launch it with the command:
>
> ~/bin/qemu-3.1.0/arm-softmmu/qemu-system-arm -machine virt,gic_version=2
> -machine virtualization=true -cpu cortex-a15 -machine virt -m 512M
> -bios u-boot.bin -device
> loader,file=xen-uImage,force-raw=on,addr=0x46000000 -device
> loader,file=zImage,addr=0x45000000 -nographic -no-reboot -chardev
> socket,id=qemu-monitor,host=localhost,port=7777,server,nowait,telnet
> -mon qemu-monitor,mode=readline
You need gic_version=3, version 2 doesn't have support for
virtualization in QEMU.
Please give a try to the command I posted in my previous email.
> I got:
>
> Starting kernel ...
>
> - 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) Looking for dtuart at "/pl011@9000000", options ""
> Xen 4.12.0
> (XEN) Xen version 4.12.0 (reprofy@local) (arm-linux-gnueabi-gcc (Debian
> 8.2.0-20) 8.2.0) debug=n Mon Jun 3 13:25:10 CEST 2019
> (XEN) Latest ChangeSet:
> (XEN) Processor: 412fc0f1: "ARM Limited", variant: 0x2, part 0xc0f, rev 0x1
> (XEN) 32-bit Execution:
> (XEN) Processor Features: 00001131:00011001
> (XEN) Instruction Sets: AArch32 A32 Thumb Thumb-2 ThumbEE Jazelle
> (XEN) Extensions: GenericTimer
> (XEN) Debug Features: 02010555
> (XEN) Auxiliary Features: 00000000
> (XEN) Memory Model Features: 10201105 20000000 01240000 02102211
> (XEN) ISA Features: 02101110 13112111 21232041 11112131 10011142 00000000
> (XEN) Generic Timer IRQ: phys=30 hyp=26 virt=27 Freq: 62500 KHz
> (XEN) GICv2m extension register frame:
> (XEN) gic_v2m_addr=0000000008020000
> (XEN) gic_v2m_size=0000000000001000
> (XEN) gic_v2m_spi_base=80
> (XEN) gic_v2m_num_spis=64
> (XEN) GICv2 initialization:
> (XEN) gic_dist_addr=0000000008000000
> (XEN) gic_cpu_addr=0000000008010000
> (XEN) gic_hyp_addr=0000000008030000
> (XEN) gic_vcpu_addr=0000000008040000
> (XEN) gic_maintenance_irq=25
> (XEN) GICv2: 288 lines, 1 cpu (IID 00000000).
> (XEN) Using scheduler: SMP Credit Scheduler rev2 (credit2)
> (XEN) Initializing Credit2 scheduler
>
> --
> Regards, Denis Obrezkov
>
>
>
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