On Tue, 2022-09-06 at 18:32 +0800, 韩光宇 wrote:
Hello,
I see `egrep -c '(vmx|svm)' /proc/cpuinfo` in nova install documentation[1]. It can be used to confirm whether a node supports hardware acceleration for virtual machines on x86 architecture. But it is not applicable in the ARM architecture.
Do we have an officially recommended method to confirm in ARM architecture?
on arm like x86 there are several extions that allow virutalistion the most basic is called VHE(Virtualization Host Extension) https://lwn.net/Articles/674533/ https://developer.arm.com/documentation/102142/0100/Virtualization-host-exte...
they really only started to be a thing in armv8.1-a onwords https://en.wikipedia.org/wiki/AArch64
im not really sure fither is a prefered way to detect those. i would hope lscpu or /proc/cpuinfo would be an option
looking on m1 macbook air under debian virt-host-valdiate show that kvm is aviable and acceible but lscpu does not show any cpu flags that looked virtualistion related. your milage might vary on a more standard arm plathform.
virt-host-validate is gerneally provided as part of the libvirt installation so that would be my starting point.
Thanks, Han Guangyu
[1]https://docs.openstack.org/nova/latest/install/compute-install-rdo.html#fina...