On 16.12.20 19:55, Andrea Bastoni wrote:
> Hi,
>
> On 16/12/2020 14:34, Jan Kiszka wrote:
>> On 10.12.20 16:20, Bram Hooimeijer wrote:
>>> Dear Jailhouse community,
>>>
>>> Over the last days I have been trying to get Jailhouse running on real
>>> hardware. I ran into quite some issues, but managed to get it running
>>> eventually.
>>> For some issues, I was able to find a solution somewhere in the mailing
>>> archives, but not for all of them. So I thought I'd share my experiences
>>> here for future references.
>>> There's also some solutions which are not entirely clear. If you have any
>>> reference on that it would be welcome, but I understand these might be very
>>> system specific as well.
>>>
>>> ** Installing Jailhouse **
>>> * Installing Jailhouse on generic Ubuntu (2.10) gives the following error:
>>>> ERROR: modpost: "lapic_timer_period"
>>>> [/data/ecseqm/jailhouse/510_siemens_jailhouse/driver/jailhouse.ko]
>>>> undefined!
>>>> ERROR: modpost: "__get_vm_area_caller"
>>>> [/data/ecseqm/jailhouse/510_siemens_jailhouse/driver/jailhouse.ko]
>>>> undefined!
>>>> ERROR: modpost: "ioremap_page_range"
>>>> [/data/ecseqm/jailhouse/510_siemens_jailhouse/driver/jailhouse.ko]
>>>> undefined!
>>> I believe some of the kernel symbols have been renamed in I believe 5.8. As
>>> a solution, I switched to 2.04 LTS (Kernel 5.4), where it installed without
>>> issues.
>>>
>>
>> That used to work by luck for some kernels via ksymall, but that is
>> disabled in other kernels for security reasons - and now even removed
>> from upstream. You need some patches from the github.com/siemens/linux
>> jailhouse-enabling/5.4 queue (or queues/jailhouse for the head queue,
>> that's on git.kiszka.org).
>>
>>> ** Enabling Jailhouse
>>> * enabling a compiled sysconfig.cell results in:
>>>> JAILHOUSE_ENABLE: Invalid argument
>>> with dmesg listing:
>>>> jailhouse: Not a system configuration
>>> This issue was already reported on the mailing list, but I'd like to note
>>> that it was not a singular case. Switching from GCC-9 to GCC-7 solved the
>>> issue for me too. I guess GCC-9 takes the freedom to move the header away
>>> from the initial memory location, which results in Jailhouse failing to
>>> verify the .cell to be a system configuration description.
>>>
>>
>> If that isn't solved in current next, we should address it. The proper
>> fix is moving away from gcc to a different way of compiling, but that's
>> another story.
>
> If it's the same issue that was reported in October ("Jailhouse in qemu and
> ubuntu"), then maybe the attached patch could help.
>
Likely. Could you send the patch as a regular one to the list? Bram,
could you test that and give feedback?
Jan
--
Siemens AG, T RDA IOT
Corporate Competence Center Embedded Linux
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