On Thu, Mar 17, 2022 at 12:07:58PM +0100, Steffen Eiden wrote: > Hi greg, > > On 3/17/22 10:59, Greg KH wrote: > > On Thu, Mar 17, 2022 at 09:47:06AM +0000, 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 can call the Retrieve Attestation Measurement > > > Ultravisor Call using IOCTLs on the uvdevice. > > > > > > The uvdevice will do some sanity checks first. > > > Then, copy the request data to kernel space, build the UVCB, > > > perform the UV call, and copy the result back to userspace. > > > > > > Signed-off-by: Steffen Eiden <seiden@xxxxxxxxxxxxx> > > > Reviewed-by: Janosch Frank <frankja@xxxxxxxxxxxxx> > > > > Do you have a pointer to the userspace code that interacts with this > > kernel driver? That would be good to have to verify that the api here > > is sane. > > > There is a userspace tool currently under development, however, not yet > ready to be published. Then really, this driver should not be merged until the user/kernel api is determined to work properly, right? Why submit this now if userspace isn't working? thanks, greg k-h
