Changes in Kconfig

e4b0925f - libnvdimm: Fix ACPI_NFIT in BLK_DEV_PMEM help

Mon, 12 Feb 2024 12:37:10 +0000

libnvdimm: Fix ACPI_NFIT in BLK_DEV_PMEM helpThe ACPI_NFIT config option is described incorrectly as theinverse NFIT_ACPI, which doesn't exist, so update the helpto the actual config option.Signed-off-by: Peter Robinson Link: https://lore.kernel.org/r/20240212123716.795996-1-pbrobinson@gmail.comSigned-off-by: Dave Jiang List of files: /linux-6.15/drivers/nvdimm/Kconfig

c91d7136 - nvdimm: Support sizeof(struct page) > MAX_STRUCT_PAGE_SIZE

Wed, 25 Jan 2023 20:23:46 +0000

nvdimm: Support sizeof(struct page) > MAX_STRUCT_PAGE_SIZECommit 6e9f05dc66f9 ("libnvdimm/pfn_dev: increase MAX_STRUCT_PAGE_SIZE")...updated MAX_STRUCT_PAGE_SIZE to account for sizeof(struct page)potentially doubling in the case of CONFIG_KMSAN=y. Unfortunately thisdoubles the amount of capacity stolen from user addressable capacity foreveryone, regardless of whether they are using the debug option. Revertthat change, mandate that MAX_STRUCT_PAGE_SIZE never exceed 64, butallow for debug scenarios to proceed with creating debug sized page mapswith a compile option to support debug scenarios.Note that this only applies to cases where the page map is permanent,i.e. stored in a reservation of the pmem itself ("--map=dev" in "ndctlcreate-namespace" terms). For the "--map=mem" case, since the allocationis ephemeral for the lifespan of the namespace, there are no explicitrestriction. However, the implicit restriction, of having enoughavailable "System RAM" to store the page map for the typically largepmem, still applies.Fixes: 6e9f05dc66f9 ("libnvdimm/pfn_dev: increase MAX_STRUCT_PAGE_SIZE")Cc: Cc: Alexander Potapenko Cc: Marco Elver Reported-by: Jeff Moyer Acked-by: Yu Zhao Link: https://lore.kernel.org/r/167467815773.463042.7022545814443036382.stgit@dwillia2-xfh.jf.intel.comSigned-off-by: Dan Williams List of files: /linux-6.15/drivers/nvdimm/Kconfig

15a83487 - libnvdimm: Introduce CONFIG_NVDIMM_SECURITY_TEST flag

Wed, 30 Nov 2022 19:23:07 +0000

libnvdimm: Introduce CONFIG_NVDIMM_SECURITY_TEST flagnfit_test overrode the security_show() sysfs attribute function in nvdimmdimm_devs in order to allow testing of security unlock. With theintroduction of CXL security commands, the trick to overridesecurity_show() becomes significantly more complicated. By introdcing asecurity flag CONFIG_NVDIMM_SECURITY_TEST, libnvdimm can just toggle thecheck via a compile option. In addition the original override can can beremoved from tools/testing/nvdimm/.The flag will also be used to bypass cpu_cache_invalidate_memregion() whenset in a different commit. This allows testing on QEMU with nfit_test orcxl_test since cpu_cache_has_invalidate_memregion() checks whetherX86_FEATURE_HYPERVISOR cpu feature flag is set on x86.Reviewed-by: Jonathan Cameron Signed-off-by: Dave Jiang Link: https://lore.kernel.org/r/166983618758.2734609.18031639517065867138.stgit@djiang5-desk3.ch.intel.comSigned-off-by: Dan Williams List of files: /linux-6.15/drivers/nvdimm/Kconfig

f8669f1d - nvdimm/blk: Delete the block-aperture window driver

Thu, 10 Mar 2022 03:49:26 +0000

nvdimm/blk: Delete the block-aperture window driverBlock Aperture Window support was an attempt to layer an error modelover PMEM for platforms that did not support machine-check-recovery.However, it was abandoned before it ever shipped, and only ever existedin the ACPI specification. Meanwhile Linux has carried a large pile ofdead code for non-shipping infrastructure. For years it has been off tothe side out of the way, but now CXL and recent directions with DAXsupport have the potential to collide with this code.In preparation for adding discontiguous namespace support, apre-requisite for the nvdimm subsystem to replace device-mapper forstriping + concatenation use cases, delete BLK aperture support.On the obscure chance that some hardware vendor shipped support for thismode, note that the driver will still keep BLK space reserved in thelabel area. So an end user in this case would still have the opportunityto report the regression to get BLK-mode support restored withoutrisking the data they have on that device.Reviewed-by: Christoph Hellwig Link: https://lore.kernel.org/r/164688416668.2879318.16903178375774275120.stgit@dwillia2-desk3.amr.corp.intel.comSigned-off-by: Dan Williams List of files: /linux-6.15/drivers/nvdimm/Kconfig

afd586f0 - dax: remove CONFIG_DAX_DRIVER

Mon, 29 Nov 2021 10:21:37 +0000

dax: remove CONFIG_DAX_DRIVERCONFIG_DAX_DRIVER only selects CONFIG_DAX now, so remove it.Signed-off-by: Christoph Hellwig Reviewed-by: Dan Williams Link: https://lore.kernel.org/r/20211129102203.2243509-4-hch@lst.deSigned-off-by: Dan Williams List of files: /linux-6.15/drivers/nvdimm/Kconfig

33dd7075 - lib: Uplevel the pmem "region" ida to a global allocator

Thu, 07 Nov 2019 01:43:31 +0000

lib: Uplevel the pmem "region" ida to a global allocatorIn preparation for handling platform differentiated memory types beyondpersistent memory, uplevel the "region" identifier to a global numberspace. This enables a device-dax instance to be registered to any memorytype with guaranteed unique names.Signed-off-by: Dan Williams Acked-by: Thomas Gleixner Signed-off-by: Rafael J. Wysocki List of files: /linux-6.15/drivers/nvdimm/Kconfig

62974fc3 - libnvdimm: Enable unit test infrastructure compile checks

Wed, 04 Sep 2019 22:43:31 +0000

libnvdimm: Enable unit test infrastructure compile checksThe infrastructure to mock core libnvdimm routines for unit testingpurposes is prone to bitrot relative to refactoring of that core. Arrangefor the unit test core to be built when CONFIG_COMPILE_TEST=y. This doesnot result in a functional unit test environment, it is only a helper for0day to catch unit test build regressions.Note that there are a few x86isms in the implementation, so this does notbother compile testing this architectures other than 64-bit x86.Link: https://lore.kernel.org/r/156763690875.2556198.15786177395425033830.stgit@dwillia2-desk3.amr.corp.intel.comReported-by: Christoph Hellwig Signed-off-by: Dan Williams Signed-off-by: Jason Gunthorpe List of files: /linux-6.15/drivers/nvdimm/Kconfig

ae4a0502 - docs: nvdimm: add it to the driver-api book

Tue, 18 Jun 2019 19:32:31 +0000

docs: nvdimm: add it to the driver-api bookThe descriptions here are from Kernel driver's PoV.Signed-off-by: Mauro Carvalho Chehab Acked-by: Dan Williams List of files: /linux-6.15/drivers/nvdimm/Kconfig

b0a4aa95 - docs: nvdimm: convert to ReST

Thu, 18 Apr 2019 17:21:14 +0000

docs: nvdimm: convert to ReSTRename the nvdimm documentation files to ReST, add anindex for them and adjust in order to produce a nice htmloutput via the Sphinx build system.At its new index.rst, let's add a :orphan: while this is not linked tothe main index.rst file, in order to avoid build warnings.Signed-off-by: Mauro Carvalho Chehab Acked-by: Dan Williams List of files: /linux-6.15/drivers/nvdimm/Kconfig

ec8f24b7 - treewide: Add SPDX license identifier - Makefile/Kconfig

Sun, 19 May 2019 12:07:45 +0000

treewide: Add SPDX license identifier - Makefile/KconfigAdd SPDX license identifiers to all Make/Kconfig files which: - Have no license information of any formThese files fall under the project license, GPL v2 only. The resulting SPDXlicense identifier is: GPL-2.0-onlySigned-off-by: Thomas Gleixner Signed-off-by: Greg Kroah-Hartman List of files: /linux-6.15/drivers/nvdimm/Kconfig

4c6926a2 - acpi/nfit, libnvdimm: Add unlock of nvdimm support for Intel DIMMs

Thu, 06 Dec 2018 20:40:01 +0000

acpi/nfit, libnvdimm: Add unlock of nvdimm support for Intel DIMMsAdd support to unlock the dimm via the kernel key management APIs. Thepassphrase is expected to be pulled from userspace through keyutils.The key management and sysfs attributes are libnvdimm generic.Encrypted keys are used to protect the nvdimm passphrase at rest. Themaster key can be a trusted-key sealed in a TPM, preferred, or anencrypted-key, more flexible, but more exposure to a potential attacker.Signed-off-by: Dave Jiang Co-developed-by: Dan Williams Reported-by: Randy Dunlap Signed-off-by: Dan Williams List of files: /linux-6.15/drivers/nvdimm/Kconfig

f22acf82 - Revert "libnvdimm, of_pmem: workaround OF_NUMA=n build error"

Thu, 19 Apr 2018 22:07:42 +0000

Revert "libnvdimm, of_pmem: workaround OF_NUMA=n build error"With commit df3f126482db ("libnvdimm, of_pmem: use dev_to_node() insteadof of_node_to_nid()") it is now possible to allow of_pmem to be built asa module as originally implemented.Signed-off-by: Dan Williams List of files: /linux-6.15/drivers/nvdimm/Kconfig

291717b6 - libnvdimm, of_pmem: workaround OF_NUMA=n build error

Mon, 09 Apr 2018 16:10:22 +0000

libnvdimm, of_pmem: workaround OF_NUMA=n build errorStephen reports that an x86 allmodconfig build fails to build theof_pmem driver due to a missing definition of of_node_to_nid(). Thathelper is currently only exported in the OF_NUMA=y case. In other cases,ppc and sparc, it is a weak symbol, and outside of those platforms it isa static inline.Until an OF_NUMA=n configuration can reliably support usage ofof_node_to_nid() in modules across architectures, mark this driver as'bool' instead of 'tristate'.Cc: Rob Herring Cc: Oliver O'Halloran Reported-by: Stephen Rothwell Signed-off-by: Dan Williams List of files: /linux-6.15/drivers/nvdimm/Kconfig

71719760 - libnvdimm: Add device-tree based driver

Fri, 06 Apr 2018 05:21:14 +0000

libnvdimm: Add device-tree based driverThis patch adds peliminary device-tree bindings for persistent memoryregions. The driver registers a libnvdimm bus for each pmem-regionnode and each address range under the node is converted to a regionwithin that bus.Signed-off-by: Oliver O'Halloran Signed-off-by: Dan Williams List of files: /linux-6.15/drivers/nvdimm/Kconfig

2080e88a - dax: introduce CONFIG_DAX_DRIVER

Fri, 30 Mar 2018 00:20:39 +0000

dax: introduce CONFIG_DAX_DRIVERIn support of allowing device-mapper to compile out idle/dead code whenthere are no dax providers in the system, introduce the DAX_DRIVERsymbol. This is selected by all leaf drivers that device-mapper might belayered on top. This allows device-mapper to conditionally 'select DAX'only when a provider is present.Cc: Martin Schwidefsky Cc: Heiko Carstens Reported-by: Bart Van Assche Reviewed-by: Mike Snitzer Signed-off-by: Dan Williams List of files: /linux-6.15/drivers/nvdimm/Kconfig

83fc61a5 - treewide: Fix typos in Kconfig

Tue, 26 Sep 2017 03:47:59 +0000

treewide: Fix typos in KconfigThis patch fixes some spelling typos found in Kconfig files.Signed-off-by: Masanari Iida Acked-by: Randy Dunlap Signed-off-by: Jiri Kosina List of files: /linux-6.15/drivers/nvdimm/Kconfig

c1d6e828 - pmem: add dax_operations support

Wed, 25 Jan 2017 07:02:09 +0000

pmem: add dax_operations supportSetup a dax_device to have the same lifetime as the pmem block deviceand add a ->direct_access() method that is equivalent topmem_direct_access(). Once fs/dax.c has been converted to usedax_operations the old pmem_direct_access() will be removed.Signed-off-by: Dan Williams List of files: /linux-6.15/drivers/nvdimm/Kconfig

867dfe34 - nvdimm: make CONFIG_NVDIMM_DAX 'bool'

Tue, 25 Oct 2016 15:52:04 +0000

nvdimm: make CONFIG_NVDIMM_DAX 'bool'A bugfix just tried to address a randconfig build problem and introduceda variant of the same problem: with CONFIG_LIBNVDIMM=y andCONFIG_NVDIMM_DAX=m, the nvdimm module now fails to link:drivers/nvdimm/built-in.o: In function `to_nd_device_type':bus.c:(.text+0x1b5d): undefined reference to `is_nd_dax'drivers/nvdimm/built-in.o: In function `nd_region_notify_driver_action.constprop.2':region_devs.c:(.text+0x6b6c): undefined reference to `is_nd_dax'region_devs.c:(.text+0x6b8c): undefined reference to `to_nd_dax'drivers/nvdimm/built-in.o: In function `nd_region_probe':region.c:(.text+0x70f3): undefined reference to `nd_dax_create'drivers/nvdimm/built-in.o: In function `mode_show':namespace_devs.c:(.text+0xa196): undefined reference to `is_nd_dax'drivers/nvdimm/built-in.o: In function `nvdimm_namespace_common_probe':(.text+0xa55f): undefined reference to `is_nd_dax'drivers/nvdimm/built-in.o: In function `nvdimm_namespace_common_probe':(.text+0xa56e): undefined reference to `to_nd_dax'This reverts the earlier fix, making NVDIMM_DAX a 'bool' option againas it should be (it gets linked into the libnvdimm module). To fixthe original problem, I'm adding a dependency on LIBNVDIMM toDEV_DAX_PMEM, which ensures we can't have that one built-in if therest is a module.Fixes: 4e65e9381c7a ("/dev/dax: fix Kconfig dependency build breakage")Signed-off-by: Arnd Bergmann Reviewed-by: Ross Zwisler Signed-off-by: Dan Williams List of files: /linux-6.15/drivers/nvdimm/Kconfig

8c27ceff - docs: fix locations of several documents that got moved

Tue, 18 Oct 2016 12:12:27 +0000

docs: fix locations of several documents that got movedThe previous patch renamed several files that are cross-referencedalong the Kernel documentation. Adjust the links to point tothe right places.Signed-off-by: Mauro Carvalho Chehab List of files: /linux-6.15/drivers/nvdimm/Kconfig

4e65e938 - /dev/dax: fix Kconfig dependency build breakage

Mon, 12 Sep 2016 16:15:07 +0000

/dev/dax: fix Kconfig dependency build breakageThe function dax_pmem_probe() in drivers/dax/pmem.c is compiled under theCONFIG_DEV_DAX_PMEM tri-state config option. This config option currentlyonly depends on CONFIG_NVDIMM_DAX, a bool, which means that the followingconfiguration is possible:CONFIG_LIBNVDIMM=m...CONFIG_NVDIMM_DAX=yCONFIG_DEV_DAX=yCONFIG_DEV_DAX_PMEM=yWith this config LIBNVDIMM is compiled as a module with NVDIMM_DAX=y justmeaning that we will compile drivers/nvdimm/dax_devs.c into that module.However, dax_pmem_probe() depends on several symbols defined indrivers/nvdimm/dax_devs.c, which results in the following build errors:drivers/built-in.o: In function `dax_pmem_probe':linux/drivers/dax/pmem.c:70: undefined reference to `to_nd_dax'linux/drivers/dax/pmem.c:74: undefined reference to`nvdimm_namespace_common_probe'linux/drivers/dax/pmem.c:80: undefined reference to `devm_nsio_enable'linux/drivers/dax/pmem.c:81: undefined reference to `nvdimm_setup_pfn'linux/drivers/dax/pmem.c:84: undefined reference to `devm_nsio_disable'linux/drivers/dax/pmem.c:122: undefined reference to `to_nd_region'drivers/built-in.o: In function `dax_pmem_init':linux/drivers/dax/pmem.c:147: undefined reference to `__nd_driver_register'Fix this by making NVDIMM_DAX a tristate. DEV_DAX_PMEM depends onNVDIMM_DAX which depends on LIBNVDIMM. Since they are all now tristates,if LIBNVDIMM is built as a kernel module DEV_DAX_PMEM will be as well.This prevents dax_devs.c from being built as a built-in while itsdependencies are in the libnvdimm.ko module.Signed-off-by: Ross Zwisler Signed-off-by: Dan Williams List of files: /linux-6.15/drivers/nvdimm/Kconfig