docs: formatdomain: clarify support of some filesystem options

Not all are supported by all hypervisors.

Signed-off-by: Ján Tomko <jtomko@redhat.com>
Reviewed-by: Andrea Bolognani <abologna@redhat.com>

diff --git a/docs/formatdomain.rst b/docs/formatdomain.rst
index 4a1b6faee49343ff88e7b0d06b6f10ca8f35d720..af62fcd82005cd4bbde1c65100efff0ed638c9b2 100644 (file)
--- a/docs/formatdomain.rst
+++ b/docs/formatdomain.rst
@@ -3686,13 +3686,16 @@ A directory on the host that can be accessed directly from the guest.
    tag that is exported to the guest as a hint for where to mount.
 ``readonly``
    Enables exporting filesystem as a readonly mount for guest, by default
-   read-write access is given (currently only works for QEMU/KVM driver).
+   read-write access is given (currently only works for QEMU/KVM driver; not
+   with virtiofs).
 ``space_hard_limit``
    Maximum space available to this guest's filesystem. :since:`Since 0.9.13`
+   Only supported by the OpenVZ driver.
 ``space_soft_limit``
    Maximum space available to this guest's filesystem. The container is
    permitted to exceed its soft limits for a grace period of time. Afterwards
    the hard limit is enforced. :since:`Since 0.9.13`
+   Only supported by the OpenVZ driver.
 
 
 Device Addresses