Re: [XenARM] Xen with Cortex-A15 - Guest data abort: Translation fault

[Jenny Smith <smithjenny183@xxxxxxxxx>]

I have both CONFIG_ARM_APPENDED_DTB and CONFIG_ARM_ATAG_DTB_COMPAT set
in my .config.

However, you're right and my kernel build doesn't seem to build the
DTBs properly. It is not building anything when calling 'make dtbs'.

Regarding the architecture configuration, all that I need to enable is
CONFIG_ARCH_VEXPRESS=y
CONFIG_ARCH_VEXPRESS_DT=y

Or is there anything I'm missing here?

Booting with your pre-built DTB still falls over when starting Dom0.
 __  __            _  _    ____                     _        _     _
 \ \/ /___ _ __   | || |  |___ \    _   _ _ __  ___| |_ __ _| |__ | | ___
  \  // _ \ '_ \  | || |_   __) |__| | | | '_ \/ __| __/ _` | '_ \| |/ _ \
  /  \  __/ | | | |__   _| / __/|__| |_| | | | \__ \ || (_| | |_) | |  __/
 /_/\_\___|_| |_|    |_|(_)_____|   \__,_|_| |_|___/\__\__,_|_.__/|_|\___|

(XEN) Latest ChangeSet: unavailable
(XEN) Using generic timer at 100000000 Hz
(XEN) Domain heap initialised
(XEN) Set hyp vector base to 238160 (expected 00238160)
(XEN) GIC: 64 lines, 1 cpu, secure (IID 0000043b).
(XEN) GICH: 4 list registers available
(XEN) Using scheduler: SMP Credit Scheduler (credit)
(XEN) Allocated console ring of 16 KiB.
(XEN) Brought up 1 CPUs
(XEN) *** LOADING DOMAIN 0 ***
(XEN) Copying 0x8 bytes from flash 00000000001c8680 to
0029fc48Populate P2M 0x80000000->0x88000000
(XEN) Map CS2 MMIO regions 1:1 in the P2M 0x18000000->0x1bffffff
(XEN) Map CS3 MMIO regions 1:1 in the P2M 0x1c000000->0x1fffffff
(XEN) Map VGIC MMIO regions 1:1 in the P2M 0x2c008000->0x2dffffff
(XEN) mapping GICC at 0x2c002000 to 0x2c006000
(XEN) Routing peripheral interrupts to guest
(XEN) VTTBR dom0 = 10080bdffe000
(XEN) Loading 00000000001c9be4 byte zImage from flash 0000000000000000
to 0000000080008000-00000000801d1be4: [..]
(XEN) Std. Loglevel: All
(XEN) Guest Loglevel: All
(XEN) *** Serial input -> DOM0 (type 'CTRL-a' three times to switch
input to Xen)
(XEN) Freed 48kB init memory.
(XEN) context switch 32767:0 (idle) -> 0:0
(XEN) VTTBR dom0 = 10080bdffe000
Uncompressing Linux... done, booting the kernel.
(XEN) Xen BUG at gic.c:351
(XEN) Unexpected Trap: Undefined Instruction
(XEN) ----[ Xen-4.2-unstable  x86_64  debug=y  Not tainted ]----
(XEN) CPU:    0
(XEN) PC:     002369d4 __bug+0x2c/0x44
(XEN) CPSR:   200001da MODE:HYP
(XEN)      R0: 0024b51c R1: 0000000a R2: 00000001 R3: 00000fff
(XEN)      R4: 00248880 R5: 00248f60 R6: 0000015f R7: 7ffe6000
(XEN)      R8: 7ffe403c R9: 00000000 R10:7fff7e08 R11:0029fee4 R12:00000000
(XEN)      SP: 0029fedc LR: 002369d4
(XEN)
(XEN) HTTBR 80ffe91000
(XEN) HDFAR c8800104
(XEN) HIFAR 0
(XEN) HPFAR 2c0010
(XEN) HCR 00000031
(XEN) HSR   0
(XEN)
(XEN) DFSR 0 DFAR 0
(XEN) IFSR 0 IFAR 0
(XEN)
(XEN) Xen stack trace from sp=0029fedc:
(XEN)    00000000 0029feec 002396f8 0029ff14 0023d58c 7fff7ea0 00269180 7fff2000
(XEN)    00269194 00000022 00268080 00000000 0029ff50 0029ff3c 00239c30 000003ff
(XEN)    00000000 c03378fc c0480260 c03432b8 80004059 412fc0f0 00000000 0029ff44
(XEN)    002399d4 0029ff4c 0023c404 0029ff50 0023835c 0000002f ffff8ad0 ffff8ad0
(XEN)    c0346688 00000000 c03378fc c0480260 c03432b8 80004059 412fc0f0 00000000
(XEN)    00000000 00000933 ffffffff 00000000 c0335268 60000153 00000000 00000000
(XEN)    00000000 00000000 00000000 00000000 00000000 c033ffb0 c035eeec c035eef8
(XEN)    c035eee0 00000000 00000000 c0335260 c035eeec c035eef8 c035eee0 00000000
(XEN)    00000000 00000000 00000000 00000000 00000000 00000000 00000000 7ffe6000
(XEN)    e7f000f0
(XEN) Xen call trace:
(XEN)    [<002369d4>] __bug+0x2c/0x44
(XEN)    [<002396f8>] gic_set_guest_irq+0x2c/0x5c
(XEN)    [<0023d58c>] vgic_vcpu_inject_irq+0x98/0x134
(XEN)    [<00239c30>] do_IRQ+0xe8/0x190
(XEN)    [<002399d4>] gic_interrupt+0x30/0x34
(XEN)    [<0023c404>] do_trap_irq+0x10/0x14
(XEN)    [<0023835c>] return_from_trap+0x0/0x10


On Mon, Feb 13, 2012 at 1:09 PM, David Vrabel <david.vrabel@xxxxxxxxxx> wrote:
> On 13/02/12 12:49, Jenny Smith wrote:
>> I also tried both device trees, e.g. vexpress-v2p-aem-v7a.dts and
>> vexpress-v2p-ca15-tc1.dts - they also both give the same error.
>
> These are the source files.  You need to build them with make dtbs and
> use the generated .dtb files.
>
> I've also uploaded a pre-built DTB to:
>
> http://xenbits.xen.org/people/dvrabel/xen-arm/vexpress-v2p-aem-v7a.dtb
>
> You also need to have CONFIG_ARM_APPENDED_DTB and
> CONFIG_ARM_ATAG_DTB_COMPAT enabled and to have appended the DTB to the
> zImage (see wiki).
>
> David

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