Re: [Xen-devel] Running Xen on Nvidia Jetson-TK1

[Meng Xu <mengxu@xxxxxxxxxxxxx>]

On Sat, Mar 12, 2016 at 9:20 AM, Dushyant Behl
<myselfdushyantbehl@xxxxxxxxx> wrote:
> Hi Julien,
>
> Thanks for the quick reply.
>
> On Thu, Mar 10, 2016 at 10:38 AM, Julien Grall <julien.grall@xxxxxxx> wrote:
>>
>> Hi Dushyant,
>>
>> On 09/03/2016 20:37, Wei Liu wrote:
>>>
>>> On Tue, Mar 08, 2016 at 08:23:29AM +0000, Dushyant K Behl wrote:
>>>>
>>>> I'm working on a research project with IBM, and I want to run Xen on
>>>> Nvidia
>>>> Tegra Jetson-tk1 board.
>>>> I looked at a post on this mailing list
>>>> (http://lists.xenproject.org/archives/
>>>> html/xen-devel/2015-03/msg01122.html),
>>>> and I am using this git tree -
>>>>
>>>> git://xenbits.xen.org/people/ianc/xen.git
>>>> and branch  - tegra-tk1-jetson-v1
>>>>
>>>> But when I try to boot Xen on the board I am not able to see any output
>>>> (even
>>>> with earlyprintk enabled).
>>>> After jumping to Xen the board just resets without showing any output.
>>>>
>>>> I am using upstream u-boot with non secure mode enabled. I have also
>>>> tested
>>>> booting the Linux kernel on the same setup
>>>> and Linux 4.0 is able to boot with all 4 cores in HYP mode and kvm
>>>> enabled.
>>>>
>>>> Can anyone help me as to what I might have done wrong while using Xen?
>>
>>
>> I never tried to boot Xen on Jetson-TK1 myself.
>>
>> Could you provide the command line you use to compile Xen (with
>> earlyprintk enabled) and the U-boot runes?
>
>
> I am running a ubuntu trusty schroot and I am using the Ubuntu/Linaro
> arm-linux-gnueabihf-gcc 4.7.3
> as the cross compiler to compile everything. The tree which I pointed
> towards (in my previous mail)
> contains the earlyprintk configurations for Jetson-TK1, so I am using this
> command to compile Xen with earlyprintk -
>
> make dist-xen debug=y CONFIG_EARLY_PRINTK=jetson XEN_TARGET_ARCH=arm32
>
> I want to update my current stage with Xen, after using this toolchain I am
> able to get Xen to print output
> on the Jetson-TK1's serial console and Xen is able to boot correctly with
> all 4 cores in HYP mode.
>
> But the problem is when Xen tries to boot the dom0 kernel and transfer
> control, I receive no output on the serial port.
> I am using Linux 4.1.0 as the dom0 kernel and the kernel is compiled with
> Xen specific options enabled.
> Also the same linux kernel is able to boot on the board without Xen.
>
> I am passing the dom0 kernel argument to Xen in the /chosen node in the
> device tree using these commands  -
>
> fdt mknod /chosen module
> fdt set /chosen/module compatible "xen,linux-zimage" "xen,multiboot-module"
> fdt set /chosen/module reg <0x0 $kernel_addr_r 0x0 0x$filesize>
> fdt set /chosen/module bootargs "$bootargs"

I haven't run Xen on ARM yet. But just a random thought:
Is it possible that you need to provide the console=hvc0 for the boot
cmdline of dom0?

dom0 needs share the serial port with Xen.

>
> I am loading Xen at top of the ram and linux and device tree at their
> default locations (near starting of ram).
>
> This is the Xen BootLog which I receive through the earlyprintk serial port
> -
>
> - UART enabled -
> - CPU 00000000 booting -
> - Xen starting in Hyp mode -
> - Zero BSS -
> - Setting up control registers -
> - CPU Init Done -- Turning on paging -
> - Ready -
> (XEN) Checking for initrd in /chosen
> (XEN) RAM: 0000000080000000 - 00000000ffefffff
> (XEN)
> (XEN) MODULE[0]: 0000000082000000 - 0000000082010000 Device Tree
> (XEN) MODULE[1]: 0000000081000000 - 0000000081544448 Kernel
> (XEN)  RESVD[0]: 0000000082000000 - 0000000082010000
> (XEN)
> (XEN) Command line: <NULL>
> (XEN) Placing Xen at 0x00000000ffc00000-0x00000000ffe00000
> (XEN) Update BOOTMOD_XEN from 00000000fd000000-00000000fd0f9701 =>
> 00000000ffc00000-00000000ffcf9701
> (XEN) Xen heap: 00000000fa000000-00000000fe000000 (16384 pages)
> (XEN) Dom heap: 507648 pages
> (XEN) Domain heap initialised
> (XEN) Platform: TEGRA124
> (XEN) No dtuart path configured
> (XEN) Bad console= option 'dtuart'
>  Xen 4.6-unstable
> (XEN) Xen version 4.6-unstable (root@) (arm-linux-gnueabihf-gcc
> (Ubuntu/Linaro 4.7.3-11ubuntu1) 4.7.3) debug=y Fri Mar 11 10:09:07 UTC 2016
> (XEN) Latest ChangeSet:
> (XEN) Processor: 413fc0f3: "ARM Limited", variant: 0x3, part 0xc0f, rev 0x3
> (XEN) 32-bit Execution:
> (XEN)   Processor Features: 00001131:00011011
> (XEN)     Instruction Sets: AArch32 A32 Thumb Thumb-2 ThumbEE Jazelle
> (XEN)     Extensions: GenericTimer Security
> (XEN)   Debug Features: 02010555
> (XEN)   Auxiliary Features: 00000000
> (XEN)   Memory Model Features: 10201105 40000000 01240000 02102211
> (XEN)  ISA Features: 02101110 13112111 21232041 11112131 10011142 00000000
> (XEN) Using PSCI-0.1 for SMP bringup
> (XEN) Generic Timer IRQ: phys=30 hyp=26 virt=27 Freq: 12000 KHz
> (XEN) GICv2 initialization:
> (XEN)         gic_dist_addr=0000000050041000
> (XEN)         gic_cpu_addr=0000000050042000
> (XEN)         gic_hyp_addr=0000000050044000
> (XEN)         gic_vcpu_addr=0000000050046000
> (XEN)         gic_maintenance_irq=25
> (XEN) GICv2: 192 lines, 4 cpus, secure (IID 0000043b).
> (XEN) Using scheduler: SMP Credit Scheduler (credit)
> (XEN) I/O virtualisation disabled
> (XEN) Allocated console ring of 32 KiB.
> (XEN) VFP implementer 0x41 architecture 4 part 0x30 variant 0xf rev 0x0
> (XEN) Bringing up CPU1
> - CPU 00000001 booting -
> - Xen starting in Hyp mode -
> - Setting up control registers -
> - CPU Init Done -- Turning on paging -
> - Ready -
> (XEN) CPU 1 booted.
> (XEN) Bringing up CPU2
> - CPU 00000002 booting -
> - Xen starting in Hyp mode -
> - Setting up control registers -
> - CPU Init Done -- Turning on paging -
> - Ready -
> (XEN) CPU 2 booted.
> (XEN) Bringing up CPU3
> - CPU 00000003 booting -
> - Xen starting in Hyp mode -
> - Setting up control registers -
> - CPU Init Done -- Turning on paging -
> - Ready -
> (XEN) CPU 3 booted.
> (XEN) Brought up 4 CPUs
> (XEN) P2M: 40-bit IPA
> (XEN) P2M: 3 levels with order-1 root, VTCR 0x80003558
> (XEN) *** LOADING DOMAIN 0 ***
> (XEN) Loading kernel from boot module @ 0000000081000000
> (XEN) Allocating 1:1 mappings totalling 128MB for dom0:
> (XEN) BANK[0] 0x00000088000000-0x00000090000000 (128MB)
> (XEN) Additional MMIO 40000-40040 (IRAM)
> (XEN) Additional MMIO 54200-54240 (Display A)
> (XEN) Additional MMIO 54240-54280 (Display B)
> (XEN) Additional MMIO 6000f-60010 (EXCEPTION VECTORS)
> (XEN) Additional MMIO 6000c-6000d (SYSREG)
> (XEN) Additional MMIO 1000-1001 (PCI CFG0)
> (XEN) Additional MMIO 1001-1002 (PCI CFG1)
> (XEN) Additional MMIO 12000-12010 (PCI IO)
> (XEN) Additional MMIO 13000-20000 (PCI MEM)
> (XEN) Additional MMIO 20000-40000 (PCI MEM (PREFETCH))
> (XEN) Additional IRQ 105 (DISPLAY)
> (XEN) TEGRA: Routing IRQ105 to dom0, ICTLR2, mask 0x000200
> (XEN) Additional IRQ 106 (DISPLAY B)
> (XEN) TEGRA: Routing IRQ106 to dom0, ICTLR2, mask 0x000400
> (XEN) Loading zImage from 0000000081000000 to
> 000000008fa00000-000000008ff44448
> (XEN) Allocating PPI 16 for event channel interrupt
> (XEN) Loading dom0 DTB to 0x000000008f800000-0x000000008f80f4a4
> (XEN) Scrubbing Free RAM on 1 nodes using 4 CPUs
> (XEN) ....done.
> (XEN) Initial low memory virq threshold set at 0x4000 pages.
> (XEN) Std. Loglevel: All
> (XEN) Guest Loglevel: All
> (XEN) *** Serial input -> DOM0 (type 'CTRL-a' three times to switch input to
> Xen)
> (XEN) Freed 272kB init memory.
>
> After this last line the system just hangs with no output on the serial
> console.

But is dom0 booted up?
If you have network, can you connect to it?
If dom0 did boot up, then at least we know it's some configuration issue.
Again, I haven't tried on ARM yet, but I'd love to... :-)

Best,

Meng

-- 
Meng Xu
PhD Student in Computer and Information Science
University of Pennsylvania
http://www.cis.upenn.edu/~mengxu/

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