On 25.03.22 16:11, 'johannes lex' via Jailhouse wrote: > Hello everybody, > > i'm investigating the jailhouse hypervisor for a research project of an > automotive company. > > As a first step, i want to set up the Jetson TX2 Board and add an inmate > which toggels one GPIO Pin. I used the VM from the ERIKA V3 > (https://www.erika-enterprise.com/index.php/download/virtual-machines.html) > as a base development platform. > So far, Jailhouse is running and my configs seem to work. > > However, I can't access (not even read) the registers of the GPIO or any > other peripheral which i assign to my cell, except the already > configured UART. > The cell config and assignment of the registers themself seems to work: > i can, for example, read the register 0x02210890 from the Linux host > before creating the cell. After creating the cell, a read attempt from > the Linux host leads to a system crash. > Unfortunately, i can't read that register from the inmate as well :/ > > Do you have a clue why i can't read the register in my setup? I've > attached my configs and the source code for the bare metal application > of the inmate. > > Or do you have any examples in which you access the GPIOs (or other > peripherals) of the Jetson TX2 from an inmate which you could share?
Already checked your configs for undesired overlaps (jailhouse config check)? Looking at the jetson-tx2-demo.c config you shared, the GPIO range is exclusively assigned from the root cell to the non-root demo. So, any further accesses from the Linux root cell should indeed trigger a violation. But accesses from the demo cell must be possible. However, I'm not seeing any violation reports regarding that cell. Jan -- You received this message because you are subscribed to the Google Groups "Jailhouse" group. To unsubscribe from this group and stop receiving emails from it, send an email to jailhouse-dev+unsubscr...@googlegroups.com. To view this discussion on the web visit https://groups.google.com/d/msgid/jailhouse-dev/27e635ef-500f-6f19-a461-9a5e88d12c8d%40web.de.
