I am trying to build L4re operating system on qemu while running VM-basic I am getting following error
FATAL: Could not create vCPU. Running virtualization-enabled kernel?
terminate called after throwing an instance of 'N2L413Runtime_errorE'
what: No such device:
I am expecting to boot fiasco kernel on L4Re qemu platform
Related
While installing falco on Digital Ocean managed kubernetes. I am getting the following error
Runtime error: can't open BPF probe '/root/.falco/falco-bpf.o': Errno 2. Exiting. I know this is caused because the ebpf probe was not installed on the cluster nodes.
But when I try installing without the ebpf probe I get the following error
Unable to load the driver. Runtime error: error opening device /host/dev/falco0. Make sure you have root credentials and that the falco module is loaded.. Exiting.
We have to manually install falco and the drivers by sshing into the nodes. After that also we can install only without the ebpf probe, using the kernel module. Has anyone faced with the same issue? Is there any solution to this without doing ssh into the nodes?
Falco version: latest
System info: Worker node Debian 10 Linux kernel 5.10.0
Cloud provider or hardware configuration: 3 vCPU, 6GB Memory, 150 GB Disk
OS: Debian 10
Kernel: Linux 5.10.0
Installation method: from source
We are running the latest raspibian on the raspberry pi board and have a kernel driver for a USB peripheral which is added externally (sudo insmod driverx.ko) after boot-up by connecting to the hardware using ssh (its a headless system).
The problem is as follows:
If the device is already connected to the system upon power-up then running sudo insmod driverx.ko leads to the terminal getting stuck (no response, Ctrl+C doesn't work). Running lsmod by starting another ssh session shows that the module is in use even though there is no code running that will use it.
If I plug the USB device after the system boots up then sudo insmod driverx.ko works normally, (the terminal is still active). Running lsmod subsequently shows that that module is loaded but not in use by anyone. I can then run my user code and everything is fine. Upon running my user code lsmod shows the kernel module is in use and the number of users is 1.
In our system the USB device will always be plugged in. The kernel version and the driver version are the same.
I can fill in more details but do not wish to bias or make this query un-readble.
Please advise on what could the problem be.
Thank you for your time and help.
Possibility is that, the device is already attached into some other driver during startup. If it’s the case, the device credential of your specific device has to be removed from the startup driver.
Check the USB device list before to insert your driver.
I want to connect windbg to Bochs virtual machine in order to debug the os, But the windbg terminates when the os boot operation starts (without any error message.)
Please consider that I have already connected windbg to Bochs through com port.
The reason this problem occurred was because of Windows first debug message. (the message was modified in Bochs for no reason and caused the windbg to crash)
I solved the problem by modifying the Bochs source code. I created a thread to create pipes after the os is booted so the Windows message is not being sent
I tried to enter monitor mode with my wlan-usb stick on my raspberry pi following this two instructions:
https://github.com/hexameron/rtlwifi
https://stackoverflow.com/questions/16365487/kali-linux-on-raspberry-pi-wlan0-monitor-mode
I'm using the following wlan-stick:
Edimax Technology Co., Ltd EW-7811Un 802.11n Wireless Adapter [Realtek RTL8188CUS]
however, if I try to load the new driver with
modprobe rtl8192cu
i get the following error:
ERROR: could not insert 'rtl8192cu': Exec format error
any idea whats going wrong?
ERROR: could not insert 'rtl8192cu': Exec format error means that this module is not for your current kernel, you can recompile kernel with rtl8192cu module enabled and then install it. Don`t know if driver if this chipset in rpi kernel supports monitor mode.
This is kernel source - https://github.com/raspberrypi/linux
And instruction on building - http://elinux.org/RPi_Kernel_Compilation
I am currently taking an operating systems class and I need to use qemu to run a small operating system that my professor provided. I am trying to use qemu within an ubuntu 12.04 virtual machine on virtualbox on my macbook air 5.2. I know the problems I am having probably have to do with nested virtualization but the specific error I get when I try to run qemu is:
Could not access the KVM kernel module: No such file or directory
failed to initialize KVM: no such file or directory
Back to tcg accelerator.
qemu does start up the os but the window flickers quite a lot and I would like to fix the KVM problem if possible. I've done research but I can't find a solution I can understand or that works so any help would be greatly appreciated.
Also for the ubuntu virtual machine in virtualbox I have both Enable VT-x/AMD-V and Enable Nested Paging checked under Hardware Virtualization. I've also tried using
modprobe kvm-intel
and I get this error:
FATAL: Error inserting kvm_intel (/lib/modules.3.5.0-22-generic/kernel/arch/x86/kvm/kvm-intel.ko): Operation not permitted.
In my case, the virtualization was disabled.
So sudo modprobe kvm-intel kept giving me the following error
could not insert 'kvm_intel': Operation not supported
I just had to go in the BIOS and enable Virtualization.
Try with sudo modprobe kvm-intel.
In order to have the module automatically loaded at the startup of the virtual machine, do the following:
Edit the corresponding file from the shell with sudo vim /etc/modules.conf
Possibly enter your username password.
Press the key G to go to the end of the document and then o to begin inserting.
Write kvm-intel and press Enter, producing a new line.
Press Esc to return to the Normal mode of vim. "--INSERT--" will disappear from
the bottom.
Save the file and exit vim by writing :wq.
You are done. Try to reboot and load the nested virtual machine.