Hi, On 6/7/19 2:28 PM, Wayne wrote: > Hello, > > I am new to Linux development and Jailhouse. I have successfully booted > the Jailhouse Hypervisor and root cell on a bare metal X86 Linux system > (No QEMU). I am now trying to load a non-root Linux cell and I have a > few questions. Jailhouse accepts and starts my non-root linux cell > configuration and I see it as "running" through the "jailhouse cell > list" command. However, I don't see any serial output from the > "non-root linux" cell booting up. I’m not sure what the non-root node > is doing at this point.
Ok, first of all, can you see any output from Jailhouse's demo inmates (e.g., tiny-demo or apic-demo)? > > My root node is a 4.16 kernel configured this way: > 1. CONFIG_JAILHOUSE_GUEST is not set > 2. CONFIG_SERIO=y > 3. CONFIG_SERIAL_8250_RUNTIME_UARTS=4 > > My non-root node is a 4.16 kernel configured this way: > 1. CONFIG_JAILHOUSE_GUEST=y > 2. CONFIG_SERIO=m (can't seem to disable > completely in my config for 4.16) > 3. CONFIG_SERIAL_8250_RUNTIME_UARTS=1 Could you please provide a full .config? What branch are you exactly using? Vanilla 4.16? Please attach your system config and your non-root linux config as well. You may also want to try https://github.com/siemens/linux . See jailhouse-enabling branches for some releases. > > In general, do the kernel config settings have to match between the root > node and non-linux or is the above fine? No, they do not have to be the same, but they can. Still, an analysis requires your .config. > > The vmlinux-4.1.16-Guest bzImage is approx 7MB, and the inmate node is > allocated ~75MB of RAM. > > I have a single UART, so I have configured the root cell system config > to output to the virtual hypervisor console: Wait... You configured your root-cell to use the hypervisor debug console? How? It's only available once the hypervisor is enabled. How should this work? But let's have a look at your configuration first. So you want to: - Have the UART (0x3f8) available in the non-root cell - Use 0x3f8 as hypervisor debug console as well - No console for root-cell Did I get this right? Ralf > > .flags = JAILHOUSE_SYS_VIRTUAL_DEBUG_CONSOLE, > > .debug_console = { > .type = JAILHOUSE_CON_TYPE_NONE, > }, > > and I have configured the non-root linux cell to output to the UART: > > (Added serial 0x3f8 to pio bitmap for non-root linux) and started the > node with this: > > ./tools/jailhouse cell linux configs/x86/linux-x86.cell > /boot/vmlinux-4.1.16-Guest -c "console=ttyS0,115200" > (Note I also tried "console=jailhouse" in the command above, and that > produces the same result) > > I then see the following on my hypervisor console (./tools/jailhouse > console -f): > > Created cell "linux-x86-demo" > ... > Cell "linux-x86-demo" can be loaded > Started cell "linux-x86-demo" > > After a little while I do get a parked CPU error on the root node, looks > like its trying to do something with the UART as well: > FATAL: Invalid PIO read, port: 3fe size: 1 > > I would expect something to pop out on the UART from the non-root linux > node first. Note that root node has serial 0x3f8 disabled in its pio > bitmap. > > I verifed that the UART is functioning by allowing the hypervisor to > print to it and also performed an echo test over ttyS0. > > I have tried several configurations of kernel.....including your current > "queues/jailhouse" branch head kernel for the non-root node, along with > the kernel config for 4.7 posted in this thread below (but I get same > result as above when I start it, no kernel output): > > > "https://groups.google.com/forum/#!searchin/jailhouse-dev/Re$3A$20Failed$20to$20boot$20jailhouse%7Csort:relevance/jailhouse-dev/M7UO89XFIk0/Qi40DDuMBAAJ";. > > Any information you can provide to me will be helpful. I'm not sure > what might be going wrong here. > > Thanks, > Wayne > > -- > 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 [email protected] > <mailto:[email protected]>. > To view this discussion on the web visit > https://groups.google.com/d/msgid/jailhouse-dev/CA%2B%2BKhc2iKk1J6%2B0huh5__dS4HyujXzV9r%2BLbKLzuVZ4K3Bt5eA%40mail.gmail.com > <https://groups.google.com/d/msgid/jailhouse-dev/CA%2B%2BKhc2iKk1J6%2B0huh5__dS4HyujXzV9r%2BLbKLzuVZ4K3Bt5eA%40mail.gmail.com?utm_medium=email&utm_source=footer>. > For more options, visit https://groups.google.com/d/optout. -- 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 [email protected]. To view this discussion on the web visit https://groups.google.com/d/msgid/jailhouse-dev/57edbc3b-cadc-c850-8310-4640fc623085%40oth-regensburg.de. For more options, visit https://groups.google.com/d/optout.
