Re: [Xen-devel] ARM64:Porting xen to new hardware

[Oleksandr Tyshchenko <olekstysh@xxxxxxxxx>]

On Thu, Aug 31, 2017 at 2:13 PM, bharat gohil <ghl.bhrt@xxxxxxxxx> wrote:
> Hello Oleksandr,
Hi Bharat

>
> I had removed A72 cluster and tried to boot only two A35 but I got same
> error.
>
> Is anything added or missing in A35 compare to A53?
Unfortunately, I don't know.

BTW, did you check your GIC settings in the device-tree?

>
> Regards,
> Bharat
>
> On Wed, Aug 30, 2017 at 8:00 PM, bharat gohil <ghl.bhrt@xxxxxxxxx> wrote:
>>
>> Hello Oleksandr,
>> Thank you very much for your input.
>>
>> Yes. agree. I will check by removing A72 core from DT.
>>
>> Thanks,
>> Bharat
>>
>> On Wed, Aug 30, 2017 at 7:44 PM, Oleksandr Tyshchenko
>> <olekstysh@xxxxxxxxx> wrote:
>>>
>>> Hi,
>>>
>>> Not sure that I am a competent person, just my assumptions.
>>>
>>> CCed ARM guys.
>>>
>>> On Tue, Aug 29, 2017 at 5:21 PM, bharat gohil <ghl.bhrt@xxxxxxxxx> wrote:
>>> > Hello All
>>> >
>>> > I am trying to run Xen on new hardware which has two A35 and one A72
>>> > core.
>>> > Xen booted intially but it hangs at
>>> > smp_call_function(setup_virt_paging_one,
>>> > (void *)val, 1) function call.
>>>
>>> It might be a consequence of that CPU cores are different. And they
>>> might have different set of features, or even settings.
>>> And these features/settings the boot CPU has don't compatible with
>>> other (non-boot) CPUs.
>>> Can you try not to bringup A72 core (remove it from DT or another
>>> way), leave only two A35 and see what will happen.
>>>
>>> > Find following log of Xen booting,same set of features.
>>> >
>>> > - UART enabled -
>>> > - CPU 00000000 booting -
>>> > - Current EL 00000008 -
>>> > - Xen starting at EL2 -
>>> > - Zero BSS -
>>> > - Setting up control registers -
>>> > - Turning on paging -
>>> > - Ready -
>>> > (XEN) Checking for initrd in /chosen
>>> > (XEN) RAM: 0000000040000000 - 00000000bfffffff
>>> > (XEN)
>>> > (XEN) MODULE[0]: 0000000044000000 - 000000004400fd5a Device Tree
>>> > (XEN)
>>> > (XEN) Command line: <NULL>
>>> Why? Does your device-tree have bootargs?
>>>
>>> > (XEN) Placing Xen at 0x00000000bfe00000-0x00000000c0000000
>>> > (XEN) Update BOOTMOD_XEN from 0000000040080000-0000000040194e01 =>
>>> > 00000000bfe01
>>> > (XEN) Domain heap initialised
>>> > (XEN) Booting using Device Tree
>>> > (XEN) Platform: Generic System
>>> > (XEN) Taking dtuart configuration from /chosen/stdout-path
>>> > (XEN) Looking for dtuart at "serial0", options ""
>>> >  __  __            _  _    _  ___                     _        _     _
>>> >  \ \/ /___ _ __   | || |  / |/ _ \    _   _ _ __  ___| |_ __ _| |__ | |
>>> > ___
>>> >   \  // _ \ '_ \  | || |_ | | | | |__| | | | '_ \/ __| __/ _` | '_ \|
>>> > |/ _ \
>>> >   /  \  __/ | | | |__   _|| | |_| |__| |_| | | | \__ \ || (_| | |_) | |
>>> > __/
>>> >  /_/\_\___|_| |_|    |_|(_)_|\___/    \__,_|_|
>>> > |_|___/\__\__,_|_.__/|_|\___|
>>> >
>>> > (XEN) Xen version 4.10-unstable (bgohil@) (aarch64-linux-gnu-gcc
>>> > (Ubuntu/Linaro7
>>> > (XEN) Latest ChangeSet: Fri Aug 11 19:02:51 2017 +0100
>>> > git:9053a74-dirty
>>> > (XEN) Processor: 410fd041: "ARM Limited", variant: 0x0, part 0xd04, rev
>>> > 0x1
>>> > (XEN) 64-bit Execution:
>>> > (XEN)   Processor Features: 0000000000002222 0000000000000000
>>> > (XEN)     Exception Levels: EL3:64+32 EL2:64+32 EL1:64+32 EL0:64+32
>>> > (XEN)     Extensions: FloatingPoint AdvancedSIMD
>>> > (XEN)   Debug Features: 0000000010305106 0000000000000000
>>> > (XEN)   Auxiliary Features: 0000000000000000 0000000000000000
>>> > (XEN)   Memory Model Features: 0000000000101122 0000000000000000
>>> > (XEN)   ISA Features:  0000000000011120 0000000000000000
>>> > (XEN) 32-bit Execution:
>>> > (XEN)   Processor Features: 00000131:00011011
>>> > (XEN)     Instruction Sets: AArch32 A32 Thumb Thumb-2 Jazelle
>>> > (XEN)     Extensions: GenericTimer Security
>>> > (XEN)   Debug Features: 03010066
>>> > (XEN)   Auxiliary Features: 00000000
>>> > (XEN)   Memory Model Features: 10201105 40000000 01260000 02102211
>>> > (XEN)  ISA Features: 02101110 13112111 21232042 01112131 00011142
>>> > 00011121
>>> > (XEN) Using PSCI-1.0 for SMP bringup
>>> > (XEN) SMP: Allowing 3 CPUs
>>> > (XEN) Generic Timer IRQ: phys=30 hyp=26 virt=27 Freq: 13000 KHz
>>> > (XEN) GICv2: WARNING: The GICC size is too small: 0x1000 expected
>>> > 0x2000
>>> Sounds like GIC settings are not completely correct.
>>> Wrong GIC settings might lead to that IPIs won't work as expected. And
>>> boot CPU will
>>> get stuck waiting for another CPU.
>>> Just double check.
>>>
>>> > (XEN) GICv2 initialization:
>>> > (XEN)         gic_dist_addr=0000000010510000
>>> > (XEN)         gic_cpu_addr=0000000010520000
>>> > (XEN)         gic_hyp_addr=0000000010540000
>>> > (XEN)         gic_vcpu_addr=0000000010560000
>>> > (XEN)         gic_maintenance_irq=25
>>> > (XEN) GICv2: 384 lines, 6 cpus, secure (IID 0200143b).
>>> > (XEN) Using scheduler: SMP Credit Scheduler (credit)
>>> > (XEN) Allocated console ring of 32 KiB.
>>> > (XEN) Bringing up CPU1
>>> > - CPU 00000001 booting -
>>> > - Current EL 00000008 -
>>> > - Xen starting at EL2 -
>>> > - Setting up control registers -
>>> > - Turning on paging -
>>> > - Ready -
>>> > (XEN) CPU 1 booted.
>>> > (XEN) Bringing up CPU2
>>> > - CPU 00000200 booting -
>>> > - Current EL 00000008 -
>>> > - Xen starting at EL2 -
>>> > - Setting up control registers -
>>> > - Turning on paging -
>>> > - Ready -
>>> > (XEN) CPU 2 booted.
>>> > (XEN) Brought up 3 CPUs
>>> > (XEN) P2M: 40-bit IPA with 40-bit PA and 8-bit VMID
>>> > (XEN) P2M: 3 levels with order-1 root, VTCR 0x80023558
>>> >
>>> > Can anyone guide me how to debug this problem or what could be wrong
>>> > here?
>>> >
>>> > It looks, writing into VTCR_EL2 hang the system.
>>> >
>>> > --
>>> > Regards,
>>> > Bharat Gohil
>>> >
>>> >
>>> > _______________________________________________
>>> > Xen-devel mailing list
>>> > Xen-devel@xxxxxxxxxxxxx
>>> > https://lists.xen.org/xen-devel
>>> >
>>>
>>> --
>>> Regards,
>>>
>>> Oleksandr Tyshchenko
>>
>>
>>
>>
>> --
>> Regards,
>> Bharat Gohil
>> Sr.Software Engineer
>> bharat.gohil@xxxxxxxxxx
>> +919427054633
>
>
>
>
> --
> Regards,
> Bharat Gohil
> Sr.Software Engineer
> bharat.gohil@xxxxxxxxxx
> +919427054633



-- 
Regards,

Oleksandr Tyshchenko

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