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Re: [Xen-devel] Running XEN on imx8mq

Hello,

> It will be difficult to help without any log. You probably want to try with
> Stefano series instead. However ...

If we comment out GPU node(gpu@38000000) , we don't see this issue and
Dom0 kernel is
loaded into memory but we following crash:

Starting kernel ...

- 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]: 00000000be511000 - 00000000be51d000 Device Tree
(XEN) MODULE[1]: 0000000040480000 - 0000000042680000 Kernel
(XEN)  RESVD[0]: 0000000043000000 - 000000004300c000
(XEN)  RESVD[1]: 00000000be511000 - 00000000be51d000
(XEN)
(XEN)
(XEN) Command line: console=dtuart dom0_mem=1024M
(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 "/serial@30860000", options ""
(XEN) Unable to initialize dtuart: -9
(XEN) Bad console= option 'dtuart'
 Xen 4.12.0-rc
(XEN) Xen version 4.12.0-rc (amit@) (aarch64-linux-gnu-gcc (Linaro GCC
7.3-2018.05) 7.3.1 20180425 [linaro-7.3-2018.05 revision
d29120a424ecfbc167ef90065c0eeb7f91977701]) debug=y  Mon Mar 18
20:31:35 I9
(XEN) Latest ChangeSet: Tue Mar 5 12:48:52 2019 +0000 git:4deeaf2
(XEN) Processor: 410fd034: "ARM Limited", variant: 0x0, part 0xd03, rev 0x4
(XEN) 64-bit Execution:
(XEN)   Processor Features: 0000000001002222 0000000000000000
(XEN)     Exception Levels: EL3:64+32 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: 0000000000001122 0000000000000000
(XEN)   ISA Features:  0000000000011120 0000000000000000
(XEN) 32-bit Execution:
(XEN)   Processor Features: 00000131:10011011
(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 SMC Calling Convention v1.0
(XEN) Using PSCI v1.0
(XEN) SMP: Allowing 4 CPUs
(XEN) Generic Timer IRQ: phys=30 hyp=26 virt=27 Freq: 8333 KHz
(XEN) GICv3 initialization:
(XEN)       gic_dist_addr=0x00000038800000
(XEN)       gic_maintenance_irq=25
(XEN)       gic_rdist_stride=0
(XEN)       gic_rdist_regions=1
(XEN)       redistributor regions:
(XEN)         - region 0: 0x00000038880000 - 0x00000038940000
(XEN) GICv3: 160 lines, (IID 0001143b).
(XEN) GICv3: CPU0: Found redistributor in region 0 @000000004001a000
(XEN) Using scheduler: SMP Credit Scheduler rev2 (credit2)
(XEN) Initializing Credit2 scheduler
(XEN)  load_precision_shift: 18
(XEN)  load_window_shift: 30
(XEN)  underload_balance_tolerance: 0
(XEN)  overload_balance_tolerance: -3
(XEN)  runqueues arrangement: socket
(XEN)  cap enforcement granularity: 10ms
(XEN) load tracking window length 1073741824 ns
(XEN) Adding cpu 0 to runqueue 0
(XEN)  First cpu on runqueue, activating
(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) GICv3: CPU1: Found redistributor in region 0 @000000004003a000
(XEN) Adding cpu 1 to runqueue 0
(XEN) CPU 1 booted.
(XEN) Bringing up CPU2
- CPU 00000002 booting -
- Current EL 00000008 -
- Xen starting at EL2 -
- Setting up control registers -
- Turning on paging -
- Ready -
(XEN) GICv3: CPU2: Found redistributor in region 0 @000000004005a000
(XEN) Adding cpu 2 to runqueue 0
(XEN) CPU 2 booted.
(XEN) Bringing up CPU3
- CPU 00000003 booting -
- Current EL 00000008 -
- Xen starting at EL2 -
- Setting up control registers -
- Turning on paging -
- Ready -
(XEN) GICv3: CPU3: Found redistributor in region 0 @000000004007a000
(XEN) Adding cpu 3 to runqueue 0
(XEN) CPU 3 booted.
(XEN) Brought up 4 CPUs
(XEN) P2M: 40-bit IPA with 40-bit PA and 8-bit VMID
(XEN) P2M: 3 levels with order-1 root, VTCR 0x80023558
(XEN) I/O virtualisation disabled
(XEN) build-id: e89d2543bdd91038674917e9d0be5b56a3ef0fd7
(XEN) alternatives: Patching with alt table 00000000002abbd8 -> 00000000002ac220
(XEN) *** LOADING DOMAIN 0 ***
(XEN) Loading Domd0 kernel from boot module @ 0000000040480000
(XEN) Allocating 1:1 mappings totalling 1024MB for dom0:
(XEN) BANK[0] 0x00000060000000-0x000000a0000000 (1024MB)
(XEN) Grant table range: 0x00000042000000-0x00000042040000
(XEN) Allocating PPI 16 for event channel interrupt
(XEN) Loading zImage from 0000000040480000 to 0000000060080000-0000000062280000
(XEN) Loading dom0 DTB to 0x0000000068000000-0x000000006800b99e
(XEN) Initial low memory virq threshold set at 0x4000 pages.
(XEN) Scrubbing Free RAM in background
(XEN) Std. Loglevel: All
(XEN) Guest Loglevel: All
(XEN) *** Serial input to DOM0 (type 'CTRL-a' three times to switch input)
(XEN) Data Abort Trap. Syndrome=0x6
(XEN) Walking Hypervisor VA 0x8 on CPU0 via TTBR 0x0000000042114000
(XEN) 0TH[0x0] = 0x0000000042113f7f
(XEN) 1ST[0x0] = 0x0000000042110f7f
(XEN) 2ND[0x0] = 0x0000000000000000
(XEN) CPU0: Unexpected Trap: Data Abort
(XEN) ----[ Xen-4.12.0-rc  arm64  debug=y   Not tainted ]----
(XEN) CPU:    0
(XEN) PC:     000000000021c220 page_alloc.c#free_heap_pages+0x3b0/0x58c
(XEN) LR:     000000000021c20c
(XEN) SP:     000080007ffefd90
(XEN) CPSR:   40000249 MODE:64-bit EL2h (Hypervisor, handler)
(XEN)      X0: 0000000000000000  X1: 0000000000000000  X2: 0000000000288db0
(XEN)      X3: ffffffffffffffff  X4: 0000000000040000  X5: 0000000000000000
(XEN)      X6: 0000000000000001  X7: 0180000000000000  X8: 0080000000000000
(XEN)      X9: 0000000000288da0 X10: 0000000000000000 X11: 0000000047ffffff
(XEN)     X12: 0000000000288000 X13: 0000000000288000 X14: 0000000000289000
(XEN)     X15: 6db6db6db6db6db7 X16: fffffff800000000 X17: 3d3d3d3d3d3d3d3d
(XEN)     X18: 0000000000289000 X19: 0000000000000000 X20: 0000000800071e30
(XEN)     X21: 0000000000000000 X22: 6db6db6db6db6db7 X23: 0000000000000013
(XEN)     X24: 0000000000288da0 X25: 0000000000289000 X26: 0000000000200200
(XEN)     X27: 0000000000100100 X28: 0000000800071e68  FP: 000080007ffefd90
(XEN)
(XEN)   VTCR_EL2: 80023558
(XEN)  VTTBR_EL2: 0000000000000000
(XEN)
(XEN)  SCTLR_EL2: 30cd183d
(XEN)    HCR_EL2: 000000000000003a
(XEN)  TTBR0_EL2: 0000000042114000
(XEN)
(XEN)    ESR_EL2: 96000006
(XEN)  HPFAR_EL2: 00000000fdce5ac0
(XEN)    FAR_EL2: 0000000000000008
(XEN)
(XEN) Xen stack trace from sp=000080007ffefd90:
(XEN)    000080007ffefdf0 000000000021e5f4 00000000002e0d40 0000000800071e30
(XEN)    0000000000000000 0000000000000056 0000000000288d78 0000000800071e30
(XEN)    0000000000000000 0000000040000000 00000000c0000000 6db6db6db6db6db7
(XEN)    000080007ffefe60 000000000021e840 0000000000056000 0000000000015800
(XEN)    000000004208a000 0000000000015800 0000000000000004 0000000000283630
(XEN)    00000000002b83d0 0000000040000000 00000000c0000000 0000000000000001
(XEN)    00000000be511000 00000000002e0d90 000080007ffefe70 000000000024e178
(XEN)    000080007ffefea0 0000000000252580 0000000000287000 0000000000000004
(XEN)    0000000000287c80 000000000031a430 00000000002d7de0 000000000029daa8
(XEN)    0000000000000000 0000000000000000 0000000000000000 0000000000000000
(XEN)    0000000000000000 0000000000000000 0000000000000000 0000000000000000
(XEN)    0000000000000000 0000000000000000 0000000000000000 0000000000000000
(XEN)    0000000000000000 0000000000000000 0000000000000000 0000000000000000
(XEN)    0000000000000000 0000000000000000 0000000000000000 0000000000000000
(XEN)    0000000000000000 0000000000000000 0000000000000000 0000000000000000
(XEN)    0000000000000000 0000000000000000 0000000000000000 0000000000000000
(XEN)    0000000000000000 0000000000000000 0000000000000000 0000000000000000
(XEN)    0000000000000000 0000000000000000 0000000000000000 0000000000000000
(XEN)    0000000000000000 0000000000000000 0000000000000000 0000000000000000
(XEN)    0000000000000000 0000000000000000
(XEN) Xen call trace:
(XEN)    [<000000000021c220>] page_alloc.c#free_heap_pages+0x3b0/0x58c (PC)
(XEN)    [<000000000021c20c>] page_alloc.c#free_heap_pages+0x39c/0x58c (LR)
(XEN)    [<000000000021e5f4>] page_alloc.c#init_heap_pages+0x334/0x4ec
(XEN)    [<000000000021e840>] init_domheap_pages+0x94/0x9c
(XEN)    [<000000000024e178>] free_init_memory+0xac/0xe0
(XEN)    [<0000000000252580>] setup.c#init_done+0x14/0x20
(XEN)    [<000000000029daa8>] 000000000029daa8
(XEN)
(XEN)
(XEN) ****************************************
(XEN) Panic on CPU 0:
(XEN) CPU0: Unexpected Trap: Data Abort
(XEN) ****************************************
(XEN)
(XEN) Reboot in five seconds...



> ... the tree you point below seems to contains a lot of patches for IMX8 
> support
> in Xen. So this may or may not be your issue. I am afraid I can't provide help
> on that tree.
>
> Cheers,
>
> --
> Julien Grall

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