From: Steffen Eiden <seiden@linux.ibm.com>
To: Heiko Carstens <hca@linux.ibm.com>,
Vasily Gorbik <gor@linux.ibm.com>,
Christian Borntraeger <borntraeger@linux.ibm.com>,
Alexander Gordeev <agordeev@linux.ibm.com>,
Janosch Frank <frankja@linux.ibm.com>,
David Hildenbrand <david@redhat.com>,
Claudio Imbrenda <imbrenda@linux.ibm.com>,
Shuah Khan <shuah@kernel.org>,
linux-kernel@vger.kernel.org, linux-s390@vger.kernel.org,
kvm@vger.kernel.org, linux-kselftest@vger.kernel.org
Subject: [PATCH 0/3] s390: Ultravisor device
Date: Thu, 17 Feb 2022 06:37:14 -0500 [thread overview]
Message-ID: <20220217113717.46624-1-seiden@linux.ibm.com> (raw)
This series adds an Ultravisor(UV) device letting the userspace send some
Ultravisor calls to the UV. Currently two calls are supported.
Query Ultravisor Information (QUI) and
Receive Attestation Measurement (Attest[ation]).
The UV device is implemented as a miscdevice accepting only IOCTLs.
The IOCTL cmd specifies the UV call and the IOCTL arg the request
and response data depending on the UV call.
The device driver writes the UV response in the ioctl argument data.
The 'uvdevice' does no checks on the request beside faulty userspace
addresses, if sizes are in a sane range before allocating in kernel space,
and other tests that prevent the system from corruption.
Especially, no checks are made, that will be performed by the UV anyway
(E.g. 'invalid command' in case of attestation on unsupported hardware).
These errors are reported back to Userspace using the UV return code
field.
Steffen Eiden (3):
drivers/s390/char: Add Ultravisor io device
drivers/s390/char: Add Ultravisor attestation to uvdevice
selftests: drivers/s390x: Add uvdevice tests
MAINTAINERS | 3 +
arch/s390/include/asm/uv.h | 23 +-
arch/s390/include/uapi/asm/uvdevice.h | 46 +++
drivers/s390/char/Kconfig | 9 +
drivers/s390/char/Makefile | 1 +
drivers/s390/char/uvdevice.c | 325 ++++++++++++++++++
tools/testing/selftests/Makefile | 1 +
tools/testing/selftests/drivers/.gitignore | 1 +
.../selftests/drivers/s390x/uvdevice/Makefile | 22 ++
.../selftests/drivers/s390x/uvdevice/config | 1 +
.../drivers/s390x/uvdevice/test_uvdevice.c | 280 +++++++++++++++
11 files changed, 711 insertions(+), 1 deletion(-)
create mode 100644 arch/s390/include/uapi/asm/uvdevice.h
create mode 100644 drivers/s390/char/uvdevice.c
create mode 100644 tools/testing/selftests/drivers/s390x/uvdevice/Makefile
create mode 100644 tools/testing/selftests/drivers/s390x/uvdevice/config
create mode 100644 tools/testing/selftests/drivers/s390x/uvdevice/test_uvdevice.c
--
2.25.1
next reply other threads:[~2022-02-17 11:37 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-02-17 11:37 Steffen Eiden [this message]
2022-02-17 11:37 ` [PATCH 1/3] drivers/s390/char: Add Ultravisor io device Steffen Eiden
2022-02-17 12:33 ` Greg KH
2022-02-21 11:08 ` Steffen Eiden
2022-02-17 11:37 ` [PATCH 2/3] drivers/s390/char: Add Ultravisor attestation to uvdevice Steffen Eiden
2022-02-17 11:37 ` [PATCH 3/3] selftests: drivers/s390x: Add uvdevice tests Steffen Eiden
2022-02-18 23:28 ` Shuah Khan
2022-02-21 11:09 ` Steffen Eiden
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