Re: i.MX8MP jailhouse load image stuck at copy_from_user

Mon, 08 Jan 2024 03:12:50 -0800 

Hi,

On 08/01/2024 09:26, wheatfox wrote:
I'm using OK8MP board with i.MX8MP CPU. I have already started jailhouse with imx8mp.cell configuration, and the example gic-demo works fine. However, when I try to start a linux inmate using imx8mp-linux-demo.cell, the jailhouse's load progress seems stuck. 


After adding some debug print in jailhouse's python script, firmware 
code and kernel module code, I found out that the *copy_from_user* call 
in *load_image* function (driver/cell.c) doesn't return and halt forever: >

jailhouse commands:
./tools/jailhouse enable ./imx8mp.cell
./tools/jailhouse cell linux \
./imx8mp-linux-demo.cell \
./kernel/Image \
-i ./kernel/ramdisk.img \



For testing, try to not load the ramdisk. The kernel should at least 
boot and crash. If that works, we know that there's something odd with 
the ramdisk.



Second, double and triple check addresses where things get loaded. 
What's in your non-root cell configuration, and where does the 
linux-loader try to load stuff? Does that match?


Thanks,
  Ralf


-d ./kernel/imx8mp-evk-inmate-wheatfox.dtb \

-c "clk_ignore_unused console=ttymxc1,0x30890000,115200 
earlycon=ec_imx6q,0x30890000,115200"



start linux cell output(with the string 'wheatfox' means it's my custom 
debug print):

root@OK8MP:/mnt# ./start-linux.sh
[wheatfox|python] Jailhouse Linux Cell Boot Helper

[wheatfox|python] linux_loader=/m[  129.965933] [wheatfox] 
(jailhouse_ioctl) ioctl=0x5401 arg=281474720244744
nt/tools/../inmates/tools/arm64/l[  129.975611] [wheatfox] 
(jailhouse_ioctl) ioctl=0x5401 arg=281474720244728

inux-loader.bin

[  129.988033] [wheatfox] (jailhouse_ioctl) ioctl=0x40100002 
arg=281474720244800

[  129.995192] [wheatfox] (jailhouse_ioctl) JAILHOUSE_CELL_CREATE
[  130.001072] [wheatfox] (jailhouse_cmd_cell_create) start
[  130.006404] [wheatfox] (jailhouse_cmd_cell_create) copy_from_user done
[  130.012960] [wheatfox] (jailhouse_cmd_cell_create) copy_from_user done
[  130.019507] [wheatfox] (jailhouse_cmd_cell_create) cell_id.id = -1
[  130.095151] IRQ 6: no longer affine to CPU2
[  130.095333] CPU2: shutdown
[  130.102251] psci: CPU2 killed (polled 0 ms)
[  130.155283] CPU3: shutdown
[  130.157999] psci: CPU3 killed (polled 0 ms)
[wheatfox] in hypercall, code = 1, arg1 = 2955416576, arg2 = 2
[wheatfox] in hypercall, JAILHOUSE_HC_CELL_CREATE
Adding virtual PCI device 00:00.0 to cell "linux-inmate-demo"
Shared memory connection established, peer cells:
  "imx8mp"
Adding virtual PCI device 00:01.0 to cell "linux-inmate-demo"
Shared memory connection established, peer cells:
  "imx8mp"
[wheatfox] in resume_cpu, cpu_id = 2
[wheatfox] in resume_cpu, target_data->cpu_suspended = 1
[wheatfox] in resume_cpu, cpu_id = 3
[wheatfox] in resume_cpu, target_data->cpu_suspended = 1
Created cell "linux-inmate-demo"
Page pool usage after cell creation: mem 82/992, remap 144/131072
[wheatfox] in resume_cpu, cpu_id = 0
[wheatfox] in resume_cpu, target_data->cpu_suspended = 1

[  130.231800] [wheatfox] (jailhouse_cmd_cell_create) Created cell 
"linux-inmate-demo"
[wheatfox|python] cell created, 
name=b'linux-inmate-demo\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00'
[wheatf[  130.249264] [wheatfox] (jailhouse_ioctl) ioctl=0x40300003 
arg=281474720245360
ox|python] trying to load linux_l[  130.257905] [wheatfox] 
(jailhouse_ioctl) JAILHOUSE_CELL_LOAD

oader.bin into cell, addr=0x0
[  130.266684] [wheatfox] (jailhouse_cmd_cell_load) start

[  130.274322] [wheatfox] (jailhouse_cmd_cell_load) 
cell_management_prologue(&cell_load.cell_id, &cell) done

[wheatfox] in hypercall, code = 3, arg1 = 1, arg2 = 4308871775073466112
[wheatfox] in hypercall, JAILHOUSE_HC_CELL_SET_LOADABLE
[wheatfox] in cell_set_loadable, id = 1
[wheatfox] cell_management_prologue finished
[wheatfox] in resume_cpu, cpu_id = 2
[wheatfox] in resume_cpu, target_data->cpu_suspended = 1
[wheatfox] in resume_cpu, cpu_id = 3
[wheatfox] in resume_cpu, target_data->cpu_suspended = 1
[wheatfox] finished arch_park_cpu
[wheatfox] cell->loadable = 0
[wheatfox] not jumped to out_resume
Cell "linux-inmate-demo" can be loaded
[wheatfox] in out_resume
[wheatfox] in resume_cpu, cpu_id = 1
[wheatfox] in resume_cpu, target_data->cpu_suspended = 1

[  130.342417] [wheatfox] (jailhouse_cmd_cell_load) 
jailhouse_call_arg1(JAILHOUSE_HC_CELL_SET_LOADABLE, cell->id) done
[  130.353079] [wheatfox] (jailhouse_cmd_cell_load) 
cell_load.num_preload_images = 1
[  130.360584] [wheatfox] (jailhouse_cmd_cell_load) load_image(cell, 
image) start, n = 1

[  130.368444] [wheatfox] (load_image) start
[  130.372468] [wheatfox] (load_image) copy_from_user done
[  130.377712] [wheatfox] (load_image) image.size = 34b0

[  130.382776] [wheatfox] (load_image) found suitable memory region, 
mem->virt_start = 0, mem->size = 10000

[  130.392280] [wheatfox] (load_image) image load mem region found
[  130.398228] [wheatfox] (load_image) phys_start = fdb00000
[  130.403653] [wheatfox] (load_image) page_offs = 0
[  130.408373] [wheatfox] (load_image) image_mem = 0000000079dd6ce3
[  130.414405] [wheatfox] (load_image) copy_from_user params:
[  130.419905] [wheatfox] (load_image) to = 0000000079dd6ce3
[  130.425329] [wheatfox] (load_image) from = 00000000c239ec71
[  130.430915] [wheatfox] (load_image) n = 34b0
[  130.435220] [wheatfox] (load_image) copy_from_user start
[  130.440563] [wheatfox] (load_image) copy_from_user done
[  130.445822] [wheatfox] (load_image) flush_icache_range done

[  130.451429] [wheatfox] (jailhouse_cmd_cell_load) load_image(cell, 
image) done, n = 1
[  130.459186] [wheatfox] (jailhouse_cmd_cell_load) unlock_out done, 
exiting jailhouse_cmd_cell_load

[wheatfox|python] linux_loader.bin loaded
[wheatfox|python] trying to load kernel into cell, addr=0xc0280000

[  130.500262] [wheatfox] (jailhouse_ioctl) ioctl=0x40300003 
arg=281474720245360

[  130.507454] [wheatfox] (jailhouse_ioctl) JAILHOUSE_CELL_LOAD
[  130.513165] [wheatfox] (jailhouse_cmd_cell_load) start

[  130.518321] [wheatfox] (jailhouse_cmd_cell_load) 
cell_management_prologue(&cell_load.cell_id, &cell) done

[wheatfox] in hypercall, code = 3, arg1 = 1, arg2 = 4308871775073466112
[wheatfox] in hypercall, JAILHOUSE_HC_CELL_SET_LOADABLE
[wheatfox] in cell_set_loadable, id = 1
[wheatfox] cell_management_prologue finished
[wheatfox] in resume_cpu, cpu_id = 2
[wheatfox] in resume_cpu, target_data->cpu_suspended = 1
[wheatfox] in resume_cpu, cpu_id = 3
[wheatfox] in resume_cpu, target_data->cpu_suspended = 1
[wheatfox] finished arch_park_cpu
[wheatfox] cell->loadable = 1
[wheatfox] in out_resume
[wheatfox] in resume_cpu, cpu_id = 1
[wheatfox] in resume_cpu, target_data->cpu_suspended = 1

[  130.579626] [wheatfox] (jailhouse_cmd_cell_load) 
jailhouse_call_arg1(JAILHOUSE_HC_CELL_SET_LOADABLE, cell->id) done
[  130.590182] [wheatfox] (jailhouse_cmd_cell_load) 
cell_load.num_preload_images = 1
[  130.597678] [wheatfox] (jailhouse_cmd_cell_load) load_image(cell, 
image) start, n = 1

[  130.605532] [wheatfox] (load_image) start
[  130.609557] [wheatfox] (load_image) copy_from_user done
[  130.614795] [wheatfox] (load_image) image.size = 1ab7200

[  130.620131] [wheatfox] (load_image) found suitable memory region, 
mem->virt_start = c0000000, mem->size = 3d700000

[  130.630505] [wheatfox] (load_image) image load mem region found
[  130.636699] [wheatfox] (load_image) phys_start = c0280000
[  130.642128] [wheatfox] (load_image) page_offs = 0
[  130.646853] [wheatfox] (load_image) image_mem = 000000007135b443
[  130.652883] [wheatfox] (load_image) copy_from_user params:
[  130.658387] [wheatfox] (load_image) to = 000000007135b443
[  130.663808] [wheatfox] (load_image) from = 00000000ebdde5d4
[  130.669399] [wheatfox] (load_image) n = 1ab7200
[  130.673952] [wheatfox] (load_image) copy_from_user start

then nothing happens after this 'copy_from_user start`, the source code is:
printk("[wheatfox] (load_image) copy_from_user start\n");
if (copy_from_user(image_mem + page_offs,
(void __user *)(unsigned long)image.source_address,
image.size))
err = -EFAULT;
printk("[wheatfox] (load_image) copy_from_user done\n");


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