intel / govmm / 370

81%

master: 81%

Pull #117

travis-ci

qemu: Don't set ".cache-size=" when CacheSize is 0

As there's no guarantee that ".cache-size" is a supported QEMU property,
let's not add it to the QEMU command line when the user explicitly set
virtio_fs_cache_size to zero.

By not always setting ".cache-size" property we avoid errors like:
```
$ sudo podman --runtime=/usr/bin/kata-runtime run --security-opt label=disable -it fedora:31 /bin/bash
Error: failed to launch qemu: exit status 1, error messages from qemu log: qemu-kvm: -device vhost-user-fs-pci,chardev=char-88c350403e95d3db,tag=kataShared,cache-size=0M: Property '.cache-size' not found: OCI runtime error
```

Signed-off-by: Fabiano Fidêncio <fidencio@redhat.com>

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