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Custom CPU Model Configuration

The /etc/pve/virtual-guest/cpu-models.conf file stores custom CPU models, which can be used by VMs to get access to advanced CPU features (for example custom CPU flags).

File Format

CPU models each have their own section in the file, beginning with the header:

cpu-model: <name>

Note that <name> does not include the custom- prefix, which is required in VM configs to denote custom CPU models.

For example, if the <name> is foobar, the CPU for a VM would need to be configured as custom-foobar.

Each section can specify several options. They are indented by either one TAB character or multiple spaces. Every option and its value is separated by one space, for example:

reported-model qemu64

See below for all available options.

Blank lines and those starting with a # are ignored.

Options

Example File

cpu-model: avx
    flags +avx;+avx2
    phys-bits host
    hidden 0
    hv-vendor-id proxmox
    reported-model kvm64