kernel/linux.git/Documentation/s390, branch v5.19

vfio/mdev: Remove CONFIG_VFIO_MDEV_DEVICE

2021-06-21T21:29:25+00:00

For some reason the vfio_mdev shim mdev_driver has its own module and kconfig. As the next patch requires access to it from mdev.ko merge the two modules together and remove VFIO_MDEV_DEVICE. A later patch deletes this driver entirely. Signed-off-by: Jason Gunthorpe Signed-off-by: Christoph Hellwig Reviewed-by: Cornelia Huck Reviewed-by: Greg Kroah-Hartman Reviewed-by: Kirti Wankhede Link: https://lore.kernel.org/r/20210617142218.1877096-7-hch@lst.de Signed-off-by: Alex Williamson

s390/pci: expose UID uniqueness guarantee

2021-04-05T09:30:57+00:00

On s390 each PCI device has a user-defined ID (UID) exposed under /sys/bus/pci/devices//uid. This ID was designed to serve as the PCI device's primary index and to match the device within Linux to the device configured in the hypervisor. To serve as a primary identifier the UID must be unique within the Linux instance, this is guaranteed by the platform if and only if the UID Uniqueness Checking flag is set within the CLP List PCI Functions response. While the UID has been exposed to userspace since commit ac4995b9d570 ("s390/pci: add some new arch specific pci attributes") whether or not the platform guarantees its uniqueness for the lifetime of the Linux instance while defined is not visible from userspace. Remedy this by exposing this as a per device attribute at /sys/bus/pci/devices//uid_is_unique Keeping this a per device attribute allows for maximum flexibility if we ever end up with some devices not having a UID or not enjoying the guaranteed uniqueness. Signed-off-by: Niklas Schnelle Reviewed-by: Viktor Mihajlovski Signed-off-by: Heiko Carstens

docs: archis: add a per-architecture features list

2020-12-03T22:10:15+00:00

Add a feature list matrix for each architecture to their respective Kernel books. Signed-off-by: Mauro Carvalho Chehab Link: https://lore.kernel.org/r/9c39d4dd93e05c0008205527d2c3450912f029ed.1606748711.git.mchehab+huawei@kernel.org Signed-off-by: Jonathan Corbet

Merge tag 'docs-5.9' of git://git.lwn.net/linux

2020-08-05T05:47:54+00:00

Pull documentation updates from Jonathan Corbet: "It's been a busy cycle for documentation - hopefully the busiest for a while to come. Changes include: - Some new Chinese translations - Progress on the battle against double words words and non-HTTPS URLs - Some block-mq documentation - More RST conversions from Mauro. At this point, that task is essentially complete, so we shouldn't see this kind of churn again for a while. Unless we decide to switch to asciidoc or something...:) - Lots of typo fixes, warning fixes, and more" * tag 'docs-5.9' of git://git.lwn.net/linux: (195 commits) scripts/kernel-doc: optionally treat warnings as errors docs: ia64: correct typo mailmap: add entry for doc/zh_CN: add cpu-load Chinese version Documentation/admin-guide: tainted-kernels: fix spelling mistake MAINTAINERS: adjust kprobes.rst entry to new location devices.txt: document rfkill allocation PCI: correct flag name docs: filesystems: vfs: correct flag name docs: filesystems: vfs: correct sync_mode flag names docs: path-lookup: markup fixes for emphasis docs: path-lookup: more markup fixes docs: path-lookup: fix HTML entity mojibake CREDITS: Replace HTTP links with HTTPS ones docs: process: Add an example for creating a fixes tag doc/zh_CN: add Chinese translation prefer section doc/zh_CN: add clearing-warn-once Chinese version doc/zh_CN: add admin-guide index doc:it_IT: process: coding-style.rst: Correct __maybe_unused compiler label futex: MAINTAINERS: Re-add selftests directory ...

S390: Replace HTTP links with HTTPS ones

2020-07-13T17:33:14+00:00

Rationale: Reduces attack surface on kernel devs opening the links for MITM as HTTPS traffic is much harder to manipulate. Deterministic algorithm: For each file: If not .svg: For each line: If doesn't contain `\bxmlns\b`: For each link, `\bhttp://[^# \t\r\n]*(?:\w|/)`: If neither `\bgnu\.org/license`, nor `\bmozilla\.org/MPL\b`: If both the HTTP and HTTPS versions return 200 OK and serve the same content: Replace HTTP with HTTPS. Signed-off-by: Alexander A. Klimov Link: https://lore.kernel.org/r/20200709182742.24724-1-grandmaster@al2klimov.de Signed-off-by: Jonathan Corbet

Documentation: s390/vfio-ap: eliminate duplicated word

2020-07-13T15:44:07+00:00

Drop the doubled word "the". Signed-off-by: Randy Dunlap Reviewed-by: Pierre Morel Cc: Jonathan Corbet Cc: linux-doc@vger.kernel.org Cc: Tony Krowiak Cc: Pierre Morel Cc: Halil Pasic Cc: linux-s390@vger.kernel.org Link: https://lore.kernel.org/r/20200707180414.10467-17-rdunlap@infradead.org Signed-off-by: Jonathan Corbet

s390/debug: remove raw view

2020-06-29T14:32:20+00:00

There is not a single user of the debug raw view. Therefore remove it before anybody uses it. If anybody would make use of the view it would expose the struct __debug_entry definition to userspace and really would make it uapi. This wouldn't be good, since the definition is suboptimal and needs to be changed. Right now the structure definition is only defined to be uapi, however there is no user. Signed-off-by: Heiko Carstens

Merge tag 's390-5.8-1' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux

2020-06-08T19:05:31+00:00

Pull s390 updates from Vasily Gorbik: - Add support for multi-function devices in pci code. - Enable PF-VF linking for architectures using the pdev->no_vf_scan flag (currently just s390). - Add reipl from NVMe support. - Get rid of critical section cleanup in entry.S. - Refactor PNSO CHSC (perform network subchannel operation) in cio and qeth. - QDIO interrupts and error handling fixes and improvements, more refactoring changes. - Align ioremap() with generic code. - Accept requests without the prefetch bit set in vfio-ccw. - Enable path handling via two new regions in vfio-ccw. - Other small fixes and improvements all over the code. * tag 's390-5.8-1' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux: (52 commits) vfio-ccw: make vfio_ccw_regops variables declarations static vfio-ccw: Add trace for CRW event vfio-ccw: Wire up the CRW irq and CRW region vfio-ccw: Introduce a new CRW region vfio-ccw: Refactor IRQ handlers vfio-ccw: Introduce a new schib region vfio-ccw: Refactor the unregister of the async regions vfio-ccw: Register a chp_event callback for vfio-ccw vfio-ccw: Introduce new helper functions to free/destroy regions vfio-ccw: document possible errors vfio-ccw: Enable transparent CCW IPL from DASD s390/pci: Log new handle in clp_disable_fh() s390/cio, s390/qeth: cleanup PNSO CHSC s390/qdio: remove q->first_to_kick s390/qdio: fix up qdio_start_irq() kerneldoc s390: remove critical section cleanup from entry.S s390: add machine check SIGP s390/pci: ioremap() align with generic code s390/ap: introduce new ap function ap_get_qdev() Documentation/s390: Update / remove developerWorks web links ...

vfio-ccw: Introduce a new CRW region

2020-06-03T09:27:43+00:00

This region provides a mechanism to pass a Channel Report Word that affect vfio-ccw devices, and needs to be passed to the guest for its awareness and/or processing. The base driver (see crw_collect_info()) provides space for two CRWs, as a subchannel event may have two CRWs chained together (one for the ssid, one for the subchannel). As vfio-ccw will deal with everything at the subchannel level, provide space for a single CRW to be transferred in one shot. Signed-off-by: Farhan Ali Signed-off-by: Eric Farman Reviewed-by: Cornelia Huck Message-Id: <20200505122745.53208-7-farman@linux.ibm.com> [CH: added padding to ccw_crw_region] Signed-off-by: Cornelia Huck

vfio-ccw: Introduce a new schib region

2020-06-02T11:14:08+00:00

The schib region can be used by userspace to get the subchannel- information block (SCHIB) for the passthrough subchannel. This can be useful to get information such as channel path information via the SCHIB.PMCW fields. Signed-off-by: Farhan Ali Signed-off-by: Eric Farman Reviewed-by: Cornelia Huck Message-Id: <20200505122745.53208-5-farman@linux.ibm.com> Signed-off-by: Cornelia Huck