On 3/2/22 11:34, Janosch Frank wrote:
On 2/23/22 15:48, Steffen Eiden wrote:
This patch adds a new miscdevice to expose some Ultravisor functions
to userspace. Userspace can send IOCTLs to the uvdevice that will then
emit a corresponding Ultravisor Call and hands the result over to
userspace. The uvdevice is available if the Ultravisor Call facility is
present.
Userspace is now able to call the Query Ultravisor Information
Ultravisor Command through the uvdevice.
Signed-off-by: Steffen Eiden <seiden@xxxxxxxxxxxxx>
---
[...]
+
+config S390_UV_UAPI
+ def_tristate y
+ prompt "Ultravisor userspace API"
+ depends on PROTECTED_VIRTUALIZATION_GUEST
Please drop the dependency.
We want this to be available to both guest and host as QUI is available
in both environments and more calls like this could follow.
We could put an option around the attestation but the savings are not
worth the effort.
Makes sense. I will drop the dependency in v3.
Steffen
