Messages in this thread | | | Date | Thu, 17 Mar 2022 10:59:29 +0100 | From | Greg KH <> | Subject | Re: [PATCH v3 1/4] drivers/s390/char: Add Ultravisor io device' |
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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@linux.ibm.com> > Reviewed-by: Janosch Frank <frankja@linux.ibm.com>
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.
thanks,
greg k-h
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