From: Greg KH <greg@kroah.com>
To: Steffen Eiden <seiden@linux.ibm.com>
Cc: agordeev@linux.ibm.com, borntraeger@linux.ibm.com,
david@redhat.com, frankja@linux.ibm.com, gor@linux.ibm.com,
hca@linux.ibm.com, imbrenda@linux.ibm.com, kvm@vger.kernel.org,
linux-kernel@vger.kernel.org, linux-kselftest@vger.kernel.org,
linux-s390@vger.kernel.org, nrb@linux.ibm.com, shuah@kernel.org
Subject: Re: [PATCH v3 1/4] drivers/s390/char: Add Ultravisor io device'
Date: Thu, 17 Mar 2022 10:59:29 +0100 [thread overview]
Message-ID: <YjMGgSstSCZAmcVa@kroah.com> (raw)
In-Reply-To: <20220317094706.4921-1-seiden@linux.ibm.com>
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
next prev parent reply other threads:[~2022-03-17 10:05 UTC|newest]
Thread overview: 14+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-03-04 14:11 [PATCH v3 0/4] s390: Ultravisor device Steffen Eiden
2022-03-04 14:11 ` [PATCH v3 1/4] drivers/s390/char: Add Ultravisor io device Steffen Eiden
2022-03-16 8:23 ` Janosch Frank
2022-03-16 9:02 ` Janosch Frank
2022-03-17 9:47 ` [PATCH v3 1/4] drivers/s390/char: Add Ultravisor io device' Steffen Eiden
2022-03-17 9:59 ` Greg KH [this message]
2022-03-17 11:07 ` [PATCH v3 1/4] drivers/s390/char: Add Ultravisor io device Steffen Eiden
2022-03-17 11:23 ` Steffen Eiden
2022-03-17 11:59 ` Greg KH
2022-03-04 14:11 ` [PATCH v3 2/4] drivers/s390/char: Add Query Ultravisor Information to uvdevice Steffen Eiden
2022-03-16 8:56 ` Janosch Frank
2022-03-04 14:11 ` [PATCH v3 3/4] selftests: drivers/s390x: Add uvdevice tests Steffen Eiden
2022-03-04 14:11 ` [PATCH v3 4/4] selftests: drivers/s390x: Add uvdevice QUI tests Steffen Eiden
2022-03-16 9:04 ` [PATCH v3 0/4] s390: Ultravisor device Janosch Frank
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