![]() InstallationĮxtract the archive to a directory and then run Coreinfo by typing from that directory Coreinfo in the console on a 32 bit Windows version or Coreinfo64 for a 64 bit version. Coreinfo is useful for gaining insight into the processor and cache topology of your system. It uses the Windows’ GetLogicalProcessorInformation function to obtain this information and prints it to the screen, representing a mapping to a logical processor with an asterisk e.g. On a system that runs udev, you will probably need to add the following line somewhere in your udev configuration so it will automatically give the right group to the newly created device (i-e for ubuntu add a line to /etc/udev/rules.d/les).Coreinfo is a command-line utility that shows you the mapping between logical processors and the physical processor, NUMA node, and socket on which they reside, as well as the cache’s assigned to each logical processor. The output of "ls -l /dev/kvm" should be like this:Ĭrw-rw-+ 1 root kvm 10, 232 09:27 /dev/kvm ![]() ![]() To work around this, we need create a new group named kvm, and make both /dev/kvm and the non-root user belongs to it. Qemu is started as non-root user in poky, but /dev/kvm from some distribution remains root:root that only allow root to use KVM. So you get a KVM capable qemu after poky build.Ĭhange the kvm dev ownership for non-root user Upstream QEMU has already supported KVM, and I have already checked in one patch to enable it. In other cases, you need refer getting kvm modules.Īfter getting the modules, you can install them into kernel by No effort is needed to build or install the modules, support is provided by the distribution, and the distribution/module combination is well tested. For someone looking for stability, these are the best choice. As of now, all major community and enterprise distributions contain kvm kernel modules these are either installed by default or require installing a kvm package. The quick & easy way for this is just using it from your distribution. In case of doubt, contact your hardware vendor. Use the `uname -r` command to query your kernel version. ![]() `/proc/cpuinfo` only shows virtualization capabilities starting with Linux 2.6.15 (Intel) and Linux 2.6.16 (AMD).Some manufacturers disable VT in the machine's BIOS, in such a way that it cannot be re-enabled.The Xen hypervisor suppresses these flags in order to prevent hijacking. You'll never see (vmx|svm) in /proc/cpuinfo if you're currently running in in a dom0 or domU.You can also check the processor model name (in `/proc/cpuinfo`) in the vendor's web site. $ egrep '^flags.*(vmx|svm)' /proc/cpuinfo With a recent enough Linux kernel, run the command: You need make sure your x86 processor support VT before using KVM. KVM also requires a modified QEMU although work is underway to get the required changes upstream.Ĭompared with native qemu, a pure emulator, KVM has better performance based on virtualization as most of guest instruction can be executed directly on the host processor. It consists of a loadable kernel module, kvm.ko, that provides the core virtualization infrastructure and a processor specific module, kvm-intel.ko or kvm-amd.ko. KVM (for Kernel-based Virtual Machine) is a full virtualization solution for Linux on x86 hardware containing virtualization extensions (Intel VT or AMD-V). 1.5 Change the kvm dev ownership for non-root userĮnable KVM for poky qemu KVM introduction. ![]()
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