Changes in Kconfig

2e4986cf - fwctl: Add basic structure for a class subsystem with a cdev

Fri, 28 Feb 2025 00:26:29 +0000

fwctl: Add basic structure for a class subsystem with a cdevCreate the class, character device and functions for a fwctl driver toun/register to the subsystem.A typical fwctl driver has a sysfs presence like:$ ls -l /dev/fwctl/fwctl0crw------- 1 root root 250, 0 Apr 25 19:16 /dev/fwctl/fwctl0$ ls /sys/class/fwctl/fwctl0dev device power subsystem uevent$ ls /sys/class/fwctl/fwctl0/device/infiniband/ibp0s10f0$ ls /sys/class/infiniband/ibp0s10f0/device/fwctl/fwctl0/$ ls /sys/devices/pci0000:00/0000:00:0a.0/fwctl/fwctl0dev device power subsystem ueventWhich allows userspace to link all the multi-subsystem driver componentstogether and learn the subsystem specific names for the device'scomponents.Link: https://patch.msgid.link/r/1-v5-642aa0c94070+4447f-fwctl_jgg@nvidia.comReviewed-by: Jonathan Cameron Reviewed-by: Dan Williams Reviewed-by: Dave Jiang Reviewed-by: Shannon Nelson Tested-by: Dave Jiang Tested-by: Shannon Nelson Signed-off-by: Jason Gunthorpe List of files: /linux-6.15/drivers/Kconfig

9a6c7821 - vlynq: remove bus driver

Fri, 22 Sep 2023 06:15:24 +0000

vlynq: remove bus driverThere are no users with a vlynq_driver in the Kernel tree. Also, onlythe AR7 platform ever initialized a VLYNQ bus, but AR7 is going to beremoved from the Kernel. OpenWRT had some out-of-tree drivers which theyprobably intended to upport, but AR7 devices are even there notsupported anymore because they are "stuck with Kernel3.18" [1]. This code can go.[1] https://openwrt.org/docs/techref/targets/ar7Signed-off-by: Wolfram Sang Acked-by: Greg Kroah-Hartman Acked-by: Florian Fainelli Signed-off-by: Thomas Bogendoerfer List of files: /linux-6.15/drivers/Kconfig

d149718e - pmdomain: Prepare to move Kconfig files into the pmdomain subsystem

Mon, 11 Sep 2023 15:22:15 +0000

pmdomain: Prepare to move Kconfig files into the pmdomain subsystemRather than having the various Kconfig files for the genpd providerssprinkled across subsystems, let's prepare to move them into the pmdomainsubsystem along with the implementations.Reviewed-by: Geert Uytterhoeven Signed-off-by: Ulf Hansson List of files: /linux-6.15/drivers/Kconfig

9431063a - dpll: core: Add DPLL framework base functions

Wed, 13 Sep 2023 20:49:37 +0000

dpll: core: Add DPLL framework base functionsDPLL framework is used to represent and configure DPLL devicesin systems. Each device that has DPLL and can configure inputsand outputs can use this framework.Implement core framework functions for further interactionswith device drivers implementing dpll subsystem, as well as forinteractions of DPLL netlink framework part with the subsystemitself.Co-developed-by: Milena Olech Signed-off-by: Milena Olech Co-developed-by: Michal Michalik Signed-off-by: Michal Michalik Signed-off-by: Vadim Fedorenko Co-developed-by: Arkadiusz Kubalewski Signed-off-by: Arkadiusz Kubalewski Signed-off-by: Jiri Pirko Signed-off-by: David S. Miller List of files: /linux-6.15/drivers/Kconfig

d34599bc - cache: Add L2 cache management for Andes AX45MP RISC-V core

Fri, 18 Aug 2023 13:57:22 +0000

cache: Add L2 cache management for Andes AX45MP RISC-V coreI/O Coherence Port (IOCP) provides an AXI interface for connectingexternal non-caching masters, such as DMA controllers. The accessesfrom IOCP are coherent with D-Caches and L2 Cache.IOCP is a specification option and is disabled on the Renesas RZ/FiveSoC due to this reason IP blocks using DMA will fail.The Andes AX45MP core has a Programmable Physical Memory Attributes (PMA)block that allows dynamic adjustment of memory attributes in the runtime.It contains a configurable amount of PMA entries implemented as CSRregisters to control the attributes of memory locations in interest.Below are the memory attributes supported:* Device, Non-bufferable* Device, bufferable* Memory, Non-cacheable, Non-bufferable* Memory, Non-cacheable, Bufferable* Memory, Write-back, No-allocate* Memory, Write-back, Read-allocate* Memory, Write-back, Write-allocate* Memory, Write-back, Read and Write-allocateMore info about PMA (section 10.3):Link: http://www.andestech.com/wp-content/uploads/AX45MP-1C-Rev.-5.0.0-Datasheet.pdfAs a workaround for SoCs with IOCP disabled CMO needs to be handled bysoftware. Firstly OpenSBI configures the memory region as"Memory, Non-cacheable, Bufferable" and passes this region as a globalshared dma pool as a DT node. With DMA_GLOBAL_POOL enabled all DMAallocations happen from this region and synchronization callbacks areimplemented to synchronize when doing DMA transactions.Example PMA region passes as a DT node from OpenSBI: reserved-memory { #address-cells = <2>; #size-cells = <2>; ranges; pma_resv0@58000000 { compatible = "shared-dma-pool"; reg = <0x0 0x58000000 0x0 0x08000000>; no-map; linux,dma-default; }; };Signed-off-by: Lad Prabhakar Reviewed-by: Conor Dooley Tested-by: Conor Dooley # tyre-kicking on a d1Link: https://lore.kernel.org/r/20230818135723.80612-6-prabhakar.mahadev-lad.rj@bp.renesas.comSigned-off-by: Palmer Dabbelt List of files: /linux-6.15/drivers/Kconfig

c0191dd6 - video: Add auxiliary display drivers to Graphics support menu

Wed, 19 Jul 2023 08:15:35 +0000

video: Add auxiliary display drivers to Graphics support menuThe drivers in this subsystem are for either character-based or monochromeLCD controllers. Which can fall into the same category of the DRM/KMS andfbdev drivers, that are located under the "Graphics support" menu.Add the auxdisplay drivers there as well to have all display drivers underthe same menu.Suggested-by: Thomas Zimmermann Signed-off-by: Javier Martinez Canillas Reviewed-by: Arnd Bergmann Tested-by: Arnd Bergmann Acked-by: Helge Deller Acked-by: Miguel Ojeda Link: https://patchwork.freedesktop.org/patch/msgid/20230719081544.741051-2-javierm@redhat.com List of files: /linux-6.15/drivers/Kconfig

2959ab24 - cdx: add the cdx bus driver

Mon, 13 Mar 2023 13:26:30 +0000

cdx: add the cdx bus driverIntroduce AMD CDX bus, which provides a mechanism for scanningand probing CDX devices. These devices are memory mapped onsystem bus for Application Processors(APUs).CDX devices can be changed dynamically in the Fabric and CDXbus interacts with CDX controller to rescan the bus andrediscover the devices.Signed-off-by: Nipun Gupta Reviewed-by: Pieter Jansen van Vuuren Tested-by: Nikhil Agarwal Link: https://lore.kernel.org/r/20230313132636.31850-2-nipun.gupta@amd.comSigned-off-by: Greg Kroah-Hartman List of files: /linux-6.15/drivers/Kconfig

8bf48897 - drivers/accel: define kconfig and register a new major

Mon, 31 Oct 2022 13:28:35 +0000

drivers/accel: define kconfig and register a new majorAdd a new Kconfig for the accel subsystem. The Kconfig currentlycontains only the basic CONFIG_DRM_ACCEL option that will be used todecide whether to compile the accel registration code. Therefore, thekconfig option is defined as bool.The accel code will be compiled as part of drm.ko and will be calleddirectly from the DRM core code. The reason we compile it as part ofdrm.ko and not as a separate module is because of cyclic dependencybetween drm.ko and the separate module (if it would have existed).This is due to the fact that DRM core code calls accel functions andvice-versa.The accelerator devices will be exposed to the user space with a new,dedicated major number - 261.The accel init function registers the new major number as a char deviceand create corresponding sysfs and debugfs root entries, similar towhat is done in DRM init function.I added a new header called drm_accel.h to include/drm/, that will holdthe prototypes of the drm_accel.c functions. In case CONFIG_DRM_ACCELis set to 'N', that header will contain empty inline implementations ofthose functions, to allow DRM core code to compile successfullywithout dependency on CONFIG_DRM_ACCEL.I Updated the MAINTAINERS file accordingly with the newly added folderand I have taken the liberty to appropriate the dri-devel mailing listand the dri-devel IRC channel for the accel subsystem.Signed-off-by: Oded Gabbay Reviewed-by: Greg Kroah-Hartman Reviewed-by: Jeffrey Hugo Reviewed-by: Dave Airlie Acked-by: Thomas Zimmermann Acked-by: Jacek Lawrynowicz Tested-by: Jacek Lawrynowicz Reviewed-by: Melissa Wen List of files: /linux-6.15/drivers/Kconfig

35ba63b8 - vme: move back to staging

Mon, 06 Jun 2022 08:41:05 +0000

vme: move back to stagingThe VME subsystem graduated from staging into a top-level subsystem in2012, with commit db3b9e990e75 ("Staging: VME: move VME drivers out ofstaging") stating: The VME device drivers have not moved out yet due to some API questions they are still working through, that should happen soon, hopefully.However, this never happened: maintenance of drivers/vme effectivelystopped in 2017, with all subsequent changes being treewide cleanups.No hardware driver remains in staging, only the limited user-levelaccess, and I just removed one of the two bridge drivers and the onlyremaining board.drivers/staging/vme/devices/ was recently moved todrivers/staging/vme_user/, but as the vme_user driver is the only oneremaining for this subsystem, it is easier to just move the remainingthree source files into this directory rather than keeping the originalhierarchy.Signed-off-by: Arnd Bergmann Link: https://lore.kernel.org/r/20220606084109.4108188-3-arnd@kernel.orgSigned-off-by: Greg Kroah-Hartman List of files: /linux-6.15/drivers/Kconfig

dd11376b - scsi: ufs: Split the drivers/scsi/ufs directory

Wed, 11 May 2022 21:25:52 +0000

scsi: ufs: Split the drivers/scsi/ufs directorySplit the drivers/scsi/ufs directory into 'core' and 'host' directoriesunder the drivers/ufs/ directory. Move shared header files into theinclude/ufs/ directory. This separation makes it clear which header filesUFS drivers are allowed to include (include/ufs/*.h) and which header filesUFS drivers are not allowed to include (drivers/ufs/core/*.h).Update the MAINTAINERS file. Add myself as a UFS reviewer.Link: https://lore.kernel.org/r/20220511212552.655341-1-bvanassche@acm.orgCc: Adrian Hunter Cc: Avri Altman Cc: Bean Huo Cc: Bjorn Andersson Cc: Keoseong Park Tested-by: Bean Huo Tested-by: Adrian Hunter Reviewed-by: Bean Huo Acked-by: Avri Altman Acked-by: Adrian Hunter Signed-off-by: Bart Van Assche Signed-off-by: Martin K. Petersen List of files: /linux-6.15/drivers/Kconfig

31ab09b4 - drivers: Add hardware timestamp engine (HTE) subsystem

Fri, 22 Apr 2022 20:52:13 +0000

drivers: Add hardware timestamp engine (HTE) subsystemSome devices can timestamp system lines/signals/Buses in real-timeusing the hardware counter or other hardware means which can givefiner granularity and help avoid jitter introduced by softwaretimestamping. To utilize such functionality, this patchset createsHTE subsystem where devices can register themselves as providers sothat the consumers devices can request specific line from theproviders. The patch also adds compilation support in Makefile andmenu options in Kconfig.The provider does following:- Registers chip with the framework.- Provides translation hook to convert logical line id.- Provides enable/disable, request/release callbacks.- Pushes timestamp data to HTE subsystem.The consumer does following:- Initializes line attribute.- Gets HTE timestamp descriptor.- Requests timestamp functionality.- Puts HTE timestamp descriptor.Signed-off-by: Dipen Patel Reported-by: kernel test robot Signed-off-by: Thierry Reding List of files: /linux-6.15/drivers/Kconfig

e5f45b01 - staging: Remove the drivers for the Unisys s-Par

Thu, 14 Apr 2022 10:32:17 +0000

staging: Remove the drivers for the Unisys s-ParThe Unisys sub-tree of drivers/staging contains three drivers for the"Unisys Secure Partition" (s-Par(R)): visorhba, visorinput, visornic.They have no maintainers, in fact the only one that is listed inMAINTAINERS has an unreacheable email address. During 2021 and 2022several patches have been submitted to these drivers but nobody atUnisys cared of reviewing the changes. Probably, also the"sparmaintainer" internal list of unisys.com is not anymore read byinterested Unisys' engineers.Therefore, remove the drivers/staging/unisys directory and delete therelevant entries in the MAINTAINERS, Kconfig, Makefile files, thenremove also the drivers/visorbus directory which is not anymore needed(it contained the driver for the virtualized bus for the Unisys s-Parfirmware).Cc: David Kershner Cc: Cc: Ken Cox Suggested-by: Greg Kroah-Hartman Signed-off-by: Fabio M. De Francesco Link: https://lore.kernel.org/r/20220414103217.32058-1-fmdefrancesco@gmail.comSigned-off-by: Greg Kroah-Hartman List of files: /linux-6.15/drivers/Kconfig

6523d3b2 - peci: Add core infrastructure

Tue, 08 Feb 2022 15:36:30 +0000

peci: Add core infrastructureIntel processors provide access for various services designed to supportprocessor and DRAM thermal management, platform manageability andprocessor interface tuning and diagnostics.Those services are available via the Platform Environment ControlInterface (PECI) that provides a communication channel between theprocessor and the Baseboard Management Controller (BMC) or otherplatform management device.This change introduces PECI subsystem by adding the initial core moduleand API for controller drivers.Co-developed-by: Jason M Bills Co-developed-by: Jae Hyun Yoo Reviewed-by: Pierre-Louis Bossart Acked-by: Joel Stanley Signed-off-by: Jason M Bills Signed-off-by: Jae Hyun Yoo Signed-off-by: Iwona Winiarska Link: https://lore.kernel.org/r/20220208153639.255278-5-iwona.winiarska@intel.comSigned-off-by: Greg Kroah-Hartman List of files: /linux-6.15/drivers/Kconfig

951cd3a0 - firmware: include drivers/firmware/Kconfig unconditionally

Tue, 28 Sep 2021 07:50:26 +0000

firmware: include drivers/firmware/Kconfig unconditionallyCompile-testing drivers that require access to a firmware layerfails when that firmware symbol is unavailable. This happenedtwice this week: - My proposed to change to rework the QCOM_SCM firmware symbol broke on ppc64 and others. - The cs_dsp firmware patch added device specific firmware loader into drivers/firmware, which broke on the same set of architectures.We should probably do the same thing for other subsystems as well,but fix this one first as this is a dependency for other patchesgetting merged.Reviewed-by: Bjorn Andersson Reviewed-by: Charles Keepax Acked-by: Will Deacon Acked-by: Bjorn Andersson Cc: Mark Brown Cc: Liam Girdwood Cc: Charles Keepax Cc: Simon Trimmer Cc: Michael Ellerman Reviewed-by: Mark Brown Signed-off-by: Arnd Bergmann List of files: /linux-6.15/drivers/Kconfig

9ea9b9c4 - remove the lightnvm subsystem

Thu, 12 Aug 2021 13:23:08 +0000

remove the lightnvm subsystemLightnvm supports the OCSSD 1.x and 2.0 specs which were early attemptsto produce Open Channel SSDs and never made it into the NVMe specproper. They have since been superceeded by NVMe enhancements suchas ZNS support. Remove the support per the deprecation schedule.Signed-off-by: Christoph Hellwig Link: https://lore.kernel.org/r/20210812132308.38486-1-hch@lst.deReviewed-by: Matias Bjørling Reviewed-by: Javier González Signed-off-by: Jens Axboe List of files: /linux-6.15/drivers/Kconfig

b7fb14d3 - ide: remove the legacy ide driver

Wed, 16 Jun 2021 13:46:58 +0000

ide: remove the legacy ide driverThe legay ide driver has been replace with libata starting in 2003 and hasbeen scheduled for removal for a while. Finally kill it off so that wecan start cleaning up various bits of cruft it forced on the block layer.Signed-off-by: Christoph Hellwig Signed-off-by: Jens Axboe List of files: /linux-6.15/drivers/Kconfig

8ffdff6a - staging: comedi: move out of staging directory

Wed, 14 Apr 2021 08:58:10 +0000

staging: comedi: move out of staging directoryThe comedi code came into the kernel back in 2008, but traces itslifetime to much much earlier. It's been polished and buffed andthere's really nothing preventing it from being part of the "real"portion of the kernel.So move it to drivers/comedi/ as it belongs there.Many thanks to the hundreds of developers who did the work to make thishappen.Cc: Ian Abbott Cc: H Hartley Sweeten Link: https://lore.kernel.org/r/YHauop4u3sP6lz8j@kroah.comSigned-off-by: Greg Kroah-Hartman List of files: /linux-6.15/drivers/Kconfig

4cdadfd5 - cxl/mem: Introduce a driver for CXL-2.0-Type-3 endpoints

Wed, 17 Feb 2021 04:09:50 +0000

cxl/mem: Introduce a driver for CXL-2.0-Type-3 endpointsThe CXL.mem protocol allows a device to act as a provider of "SystemRAM" and/or "Persistent Memory" that is fully coherent as if the memorywas attached to the typical CPU memory controller.With the CXL-2.0 specification a PCI endpoint can implement a "Type-3"device interface and give the operating system control over "HostManaged Device Memory". See section 2.3 Type 3 CXL Device.The memory range exported by the device may optionally be described bythe platform firmware memory map, or by infrastructure like LIBNVDIMM toprovision persistent memory capacity from one, or more, CXL.mem devices.A pre-requisite for Linux-managed memory-capacity provisioning is thiscxl_mem driver that can speak the mailbox protocol defined in section8.2.8.4 Mailbox Registers.For now just land the initial driver boiler-plate and Documentation/infrastructure.Signed-off-by: Ben Widawsky Reviewed-by: Jonathan Cameron Acked-by: David Rientjes (v1)Cc: Jonathan Corbet Link: https://www.computeexpresslink.org/download-the-specificationLink: https://lore.kernel.org/r/20210217040958.1354670-2-ben.widawsky@intel.comSigned-off-by: Dan Williams List of files: /linux-6.15/drivers/Kconfig

c9b9f5f8 - vdpa: move to drivers/vdpa

Tue, 31 Mar 2020 19:15:14 +0000

vdpa: move to drivers/vdpaWe have both vhost and virtio drivers that depend on vdpa.It's easier to locate it at a top level directory otherwisewe run into issues e.g. if vhost is built-in but virtiois modular. Let's just move it up a level.Reported-by: Randy Dunlap Signed-off-by: Michael S. Tsirkin List of files: /linux-6.15/drivers/Kconfig

20c384f1 - vhost: refine vhost and vringh kconfig

Thu, 26 Mar 2020 14:01:17 +0000

vhost: refine vhost and vringh kconfigCurrently, CONFIG_VHOST depends on CONFIG_VIRTUALIZATION. But vhost isnot necessarily for VM since it's a generic userspace and kernelcommunication protocol. Such dependency may prevent archs withoutvirtualization support from using vhost.To solve this, a dedicated vhost menu is created under drivers soCONIFG_VHOST can be decoupled out of CONFIG_VIRTUALIZATION.While at it, also squash Kconfig.vringh into vhost Kconfig file. Thisavoids the trick of conditional inclusion from VOP or CAIF. Then itwill be easier to introduce new vringh users and common dependency forboth vringh and vhost.Signed-off-by: Jason Wang Link: https://lore.kernel.org/r/20200326140125.19794-2-jasowang@redhat.comSigned-off-by: Michael S. Tsirkin List of files: /linux-6.15/drivers/Kconfig