kernel/drivers/s390/char/Kconfig, branch linux-6.9.y

s390/uvdevice: Add info IOCTL

2023-06-16T09:08:09Z

Add an IOCTL that allows userspace to find out which IOCTLs the uvdevice supports without trial and error. Explicitly expose the IOCTL nr for the request types. Signed-off-by: Steffen Eiden Reviewed-by: Janosch Frank Link: https://lore.kernel.org/r/20230615100533.3996107-3-seiden@linux.ibm.com Signed-off-by: Janosch Frank Message-Id: <20230615100533.3996107-3-seiden@linux.ibm.com>

s390/tty3270: rename to con3270

2023-01-09T13:33:56Z

Rename the driver file to con3270 to be in sync with con3215.c. This removes CONFIG_TN3270_TTY, it is now always build if CONFIG_TN3270 is enabled. Signed-off-by: Sven Schnelle Acked-by: Heiko Carstens Tested-by: Niklas Schnelle Signed-off-by: Heiko Carstens

s390/hmcdrv: fix Kconfig "its" grammar

2022-07-28T16:05:22Z

Use the possessive "its" instead of the contraction "it's" where appropriate. Signed-off-by: Randy Dunlap Cc: Heiko Carstens Cc: Vasily Gorbik Cc: Alexander Gordeev Cc: linux-s390@vger.kernel.org Link: https://lore.kernel.org/r/20220715020010.12678-1-rdunlap@infradead.org Signed-off-by: Alexander Gordeev

s390/uv_uapi: depend on CONFIG_S390

2022-05-25T09:11:36Z

Signed-off-by: Paolo Bonzini

drivers/s390/char: Add Ultravisor io device

2022-05-20T14:38:35Z

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 Reviewed-by: Janosch Frank Reviewed-by: Claudio Imbrenda Link: https://lore.kernel.org/kvm/20220516113335.338212-1-seiden@linux.ibm.com/ Message-Id: <20220516113335.338212-1-seiden@linux.ibm.com> Signed-off-by: Janosch Frank (whitespace and tristate fixes, pick)

s390/sclp: remove call home support

2019-06-19T15:54:27Z

This feature has never been used, so remove it. Acked-by: Vasily Gorbik Acked-by: Hendrik Brueckner Signed-off-by: Heiko Carstens Signed-off-by: Vasily Gorbik

s390/Kconfig: pedantic cleanups

2019-06-04T13:03:46Z

Formatting of Kconfig files doesn't look so pretty, so just take damp cloth and clean it up. Signed-off-by: Enrico Weigelt, metux IT consult Signed-off-by: Heiko Carstens

s390: add a few more SPDX identifiers

2017-12-05T06:51:09Z

Add the correct SPDX license to a few more files under arch/s390 and drivers/s390 which have been missed to far. The SPDX identifier is a legally binding shorthand, which can be used instead of the full boiler plate text. Signed-off-by: Martin Schwidefsky

s390/vmcp: make use of contiguous memory allocator

2017-08-09T13:09:35Z

If memory is fragmented it is unlikely that large order memory allocations succeed. This has been an issue with the vmcp device driver since a long time, since it requires large physical contiguous memory ares for large responses. To hopefully resolve this issue make use of the contiguous memory allocator (cma). This patch adds a vmcp specific vmcp cma area with a default size of 4MB. The size can be changed either via the VMCP_CMA_SIZE config option at compile time or with the "vmcp_cma" kernel parameter (e.g. "vmcp_cma=16m"). For any vmcp response buffers larger than 16k memory from the cma area will be allocated. If such an allocation fails, there is a fallback to the buddy allocator. Signed-off-by: Heiko Carstens Signed-off-by: Martin Schwidefsky

s390/sclp: add open for business support

2015-11-27T08:24:18Z

Provide a user space interface and an enhancement to the sclp device driver which allows to send an 'Open for Business' event from the operating system to the Support Element. The 'Open for Business' event is used to signal the Support Element that the operating system (or an application running on top of it) is up and running. Signed-off-by: Jochen Schweflinghaus Signed-off-by: Heiko Carstens Signed-off-by: Martin Schwidefsky