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.
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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