My serial port is "/dev/ttyUSB0".
I've connected this with an other Linux PC and tested it with "minicom".
But if I start Jailhouse with "jailhouse enable ..." then I do not receive
any messages via this serial port.
Do jailhouse use "/dev/ttyUSB*"?
Jan-Marc Stranz schrieb am Mittwoch, 9. September 2020 um 15:55:31 UTC+2:
> I got it!
> The entry msut be "memmap=0x5200000\$0x3a000000"(only one "\").
>
> The command "less /proc/iomem" then shows the following:
> ...
> 3a000000-3f1fffff : Reserved
> ...
>
> So far everything is fine.
>
> I've also tried "jailhouse enable nuc8i7.cell"; the system freezes.
> So now I have to adjust the cell configuration.
> It could be that I need your help later.
>
>
> j.kiszka...@gmail.com schrieb am Mittwoch, 9. September 2020 um 15:35:09
> UTC+2:
>
>> On 09.09.20 15:21, Jan-Marc Stranz wrote:
>> > I change the kernel command line directly in the "grub.cfg" file; i.e.
>> > the resulting command line is identical to the line specified in the
>> file.
>> >
>> > I've also tried "memmap=0x5200000\\\$0x3a000000" with the same result.
>> >
>>
>> If the resulting command line of the kernel is actually
>> "memmap=0x5200000$0x3a000000" now (directly in grub.conf, you must only
>> quote once: "\$"), you either have some other resources at 0x3a000000,
>> not just RAM. Check what /proc/iomem reports - when that parameter is
>> not in use. Or your system has less than 512 MB RAM (unlikely)...
>>
>> Maybe share your generated config.c.
>>
>> Jan
>>
>> > j.kiszka...@gmail.com schrieb am Mittwoch, 9. September 2020 um
>> 15:10:03
>> > UTC+2:
>> >
>> > On 09.09.20 14:58, Jan-Marc Stranz wrote:
>> > > I have good news.
>> > > I now have a Linux system on an Intel NUC8I7 with IOMMU support!.
>> > >
>> > > The hardware check of Jalihouse works and I was able to create a
>> > > configuration for the root cell with "jailhouse config create
>> > nuc8i7.c".
>> > > (I've attached this configuration.)
>> > > I inserted this cell configuration into the Yocto build system and
>> > the
>> > > file "nuc8i7.cell" is created and installed under
>> > > "/usr/share/jailhouse/cells".
>> > >
>> > > In order to start Jailhouse with "jailhouse enable nuc8i7.cell" I
>> > > extended the Linux command line with:
>> > > intel_iommu=off memmap=0x5200000$0x3a000000
>> > >
>> > > I took the entry "memmap = ..." from the generated configuration
>> > "nuc8i7.c".
>> > >
>> > > While re-booting the system it gets stuck with the following message:
>> > > Kernel panic - System is deadlocked on memory
>> > >
>> > > The kernel parameter "memmap = ..." should actually work, because
>> > 82M
>> > > of the following area is reserved:
>> > >
>> > > /* MemRegion: 00100000-39ffffff : System RAM */
>> > > {
>> > > .phys_start = 0x100000,
>> > > .virt_start = 0x100000,
>> > > .size = 0x39f00000,
>> > > .flags = JAILHOUSE_MEM_READ | JAILHOUSE_MEM_WRITE |
>> > > JAILHOUSE_MEM_EXECUTE | JAILHOUSE_MEM_DMA,
>> > > }
>> > >
>> > > What could I do?
>> > >
>> >
>> > Most probably, that "$" in the kernel command line is prematurely
>> > resolved as "$0" or so and the resulting kernel command line is
>> > invalid.
>> > Depending in how you inject the parameter, make sure quoting or
>> > escaping
>> > ("\$", or even more) is correctly done and validate the output of the
>> > kernel.
>> >
>> > Jan
>> >
>> > --
>> > Siemens AG, Corporate Technology, CT RDA IOT SES-DE
>> > Corporate Competence Center Embedded Linux
>> >
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>>
>> > <
>> https://groups.google.com/d/msgid/jailhouse-dev/618bbad6-8276-476b-934e-ea765b28a796n%40googlegroups.com?utm_medium=email&utm_source=footer>.
>>
>>
>>
>> --
>> Siemens AG, Corporate Technology, CT RDA IOT SES-DE
>> Corporate Competence Center Embedded Linux
>>
>
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