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Re: [Xen-users] How to build Mini-OS for ARM
Ok, now that is clear.
(Sorry for the formatting)
As said before, there are no point to try this because Xen does not support GICv3 for Arm32.
Cheers
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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