Experimenting the vm-tz example on the Freescale i.mx6 SDB

Mahdi Aichouch foxmehdi at gmail.com
Fri Mar 20 09:48:52 CET 2015


Hello,

I am trying to test the "vm-tz", and I created a new entry in the
"/src/l4/conf/modules.list".

entry tz_vm
roottask moe --init=rom/vm-tz
module l4re
module vm-tz

Is my entry correct? Or there is some missing modules?
How to know what modules should be included?

Does someone has a successful running configuration.
Is it possible to share with us a working configuration.

Thank you very much in advance.

Best regards,

Mahdi




On Tue, Mar 17, 2015 at 4:39 PM, Mahdi Aichouch <foxmehdi at gmail.com> wrote:

> Hello,
>
> I was able to correct the error related to the creation of the VM, by
> recompiling the fiasco kernel using
> the "trustzone secure side" as an Execution Model option instead of the
> "Standard Mode".
>
> Now the code goes further and it stops at
>
> l4sigma0_map_iomem(sigma0_cap.cap(), Ram_base, Ram_base, Ram_size, 1);
>
> which return the following error:
>
> MOE: Hello world
> MOE: found 1031204 KByte free memory
> MOE: found RAM from 10000000 to 4f000000
> MOE: allocated 1008 KByte for the page array @0x10194000
> MOE: virtual user address space [0-bfffffff]
> MOE: rom name space cap -> [C:501000]
>   BOOTFS: [11100000-11119474] [C:503000] l4re
>   BOOTFS: [1111a000-1113365c] [C:504000] vm-tz
> MOE: cmdline: moe --init=rom/vm-tz
> MOE: Starting: rom/vm-tz
> MOE: loading 'rom/vm-tz'
> Vmm started
> Cannot map nonsecure memory No fpage received
>
> I used the same memory parameters of the example, that is,
> the RAM base of the non secure world is 0x20000000, and
> the RAM size is 0x00100000.
>
> Could someone help me to correct this.
>
> Thank you very much in advance.
>
> Best regards,
> Mahdi
>
>
> On Tue, Mar 17, 2015 at 2:46 PM, Mahdi Aichouch <foxmehdi at gmail.com>
> wrote:
>
>> Hello,
>>
>> I am trying to experiment the "vm-tz" example on the Freescale i.mx6 SDB
>> board.
>>
>> At first, my goal is to understand the example, thus I am interested in
>> running
>> a simple test kernel instead of a full linux kernel.
>>
>> Specifically, I am trying to reproduce the experimentation of the article
>> related to the trustzone
>> implementation on Fiasco.OC L4re, "ARM Trustzone as a Virtualization
>> Technique in Embedded Systems".
>> In particular, it is mentioned in the article at the "Implementation"
>> paragraph that "Multiplexing two or more OS is supported by our design."
>> I would like to investigate this point.
>>
>> I created a new entry to generate the vm-tz binary.
>> I added the following entry to the "src/l4/conf/modules.list" file :
>>
>> entry tz_vm
>> roottask moe --init=rom/vm-tz
>> module l4re
>> module vm-tz
>>
>> Is my configuration entry correct, is there any missing modules that are
>> required by the example?
>>
>> I tested the binary on the board using tftp, and I obtained the following
>> results:
>>
>> L4 Bootstrapper
>>   Build: #12 Tue Mar 17 12:10:02 CET 2015, 4.8.3 20140320 (prerelease)
>>   Scanning up to 1024 MB RAM, starting at offset 32MB
>>   Memory size is 1024MB (10000000 - 4fffffff)
>>   RAM: 0000000010000000 - 000000004fffffff: 1048576kB
>>   Total RAM: 1024MB
>>   Scanning fiasco
>>   Scanning sigma0
>>   Scanning moe
>>   Moving up to 5 modules behind 11100000
>>   moving module 02 { 110a5000-110de63f } -> { 11195000-111ce63f } [235072]
>>   moving module 01 { 1109b000-110a438b } -> { 1118b000-1119438b } [37772]
>>   moving module 00 { 11044000-1109a0c7 } -> { 11134000-1118a0c7 } [352456]
>>   moving module 04 { 1102a000-11043597 } -> { 1111a000-11133597 } [103832]
>>   moving module 03 { 11010000-11029473 } -> { 11100000-11119473 } [103540]
>>   Loading fiasco
>>   Loading sigma0
>>   Loading moe
>>   find kernel info page...
>>   found kernel info page at 0x10002000
>> Regions of list 'regions'
>>     [ 10000000,  100000e3] {       e4} Root   mbi_rt
>>     [ 10001000,  10001aff] {      b00} Kern   fiasco
>>     [ 10002000,  10062fff] {    61000} Kern   fiasco
>>     [ 10090000,  10096edf] {     6ee0} Sigma0 sigma0
>>     [ 10098000,  1009e177] {     6178} Sigma0 sigma0
>>     [ 10140000,  10171d77] {    31d78} Root   moe
>>     [ 10178000,  101934ab] {    1b4ac} Root   moe
>>     [ 11000000,  1100f4ff] {     f500} Boot   bootstrap
>>     [ 11100000,  11133fff] {    34000} Root   Module
>>   API Version: (87) experimental
>>   Sigma0 config    ip:10090100 sp:00000000
>>   Roottask config  ip:10140260 sp:00000000
>>   Starting kernel fiasco at 100012c8
>> Number of IRQs available at this GIC: 160
>> FPU0: Arch: VFPv3(3), Part: VFPv3(30), r: 4, v: 9, i: 41, t: hard, p:
>> dbl/sngl
>> L2: ID=410000c7 Type=9e340340 Aux=02070000 WMask=ffff S=0
>> L2: Type L2C-310 Size = 1024kB  Ways=16 Waysize=64
>> SERIAL ESC: allocated IRQ 58 for serial uart
>> Not using serial hack in slow timer handler.
>> Welcome to Fiasco.OC (arm)!
>> L4/Fiasco.OC arm microkernel (C) 1998-2013 TU Dresden
>> Rev: rexported compiled with gcc 4.8.3 for i.MX6    []
>> Build: #3 Wed Mar 11 16:43:41 CET 2015
>>
>> Calibrating timer loop... done.
>> MDB: use page size: 20
>> MDB: use page size: 12
>> SIGMA0: Hello!
>>   KIP @ 10002000
>>   allocated 4KB for maintenance structures
>> SIGMA0: Dump of all resource maps
>> RAM:------------------------
>> [4:10000000;10000fff]
>> [0:10063000;1008ffff]
>> [0:10097000;10097fff]
>> [0:1009f000;1013ffff]
>> [4:10140000;10171fff]
>> [0:10172000;10177fff]
>> [4:10178000;10193fff]
>> [0:10194000;110fffff]
>> [4:11100000;11133fff]
>> [0:11134000;4effffff]
>> IOMEM:----------------------
>> [0:0;fffffff]
>> [0:50000000;ffffffff]
>> MOE: Hello world
>> MOE: found 1031220 KByte free memory
>> MOE: found RAM from 10000000 to 4f000000
>> MOE: allocated 1008 KByte for the page array @0x10194000
>> MOE: virtual user address space [0-bfffffff]
>> MOE: rom name space cap -> [C:501000]
>>   BOOTFS: [11100000-11119474] [C:503000] l4re
>>   BOOTFS: [1111a000-11133598] [C:504000] vm-tz
>> MOE: cmdline: moe --init=rom/vm-tz
>> MOE: Starting: rom/vm-tz
>> MOE: loading 'rom/vm-tz'
>> Vmm started
>> terminate called after throwing an instance of 'N2L413Runtime_errorE'
>> MOE: task 270000679 exited with 127
>>
>> The code stops at the beginning when it tries to create a VM :
>>
>> L4Re::chksys(env->factory()->create_vm(vm));
>>
>> After reading through the code, I saw that the code example is expecting
>> a linux-image and an initrd to be provided. Is it possible to tell me where
>> these should be added in the build directory? In my test case, the
>> linux-image will be replaced by a simple kernel image.
>>
>> Could someone help me to correct my test case.
>>
>> Many thanks in advance.
>>
>> Best regards,
>> Mahdi
>>
>
>
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