June 2015 - Linux-nvdimm

[ndctl PATCH 0/6] nvdimm flags, read-only devices, and a fix for zeroing-labels

by Dan Williams

The bulk of this update is unit test extensions for verifying that libnvdimm properly marks namespaces and btts as read-only depending on the state of the "energy-source armed" flag in the NFIT. See patch14 [1] and patch15 [2] in the latest kernel updates. The ndctl_dimm_zero_labels() library call was neglecting to flush the cached copy of the labels being held by the kernel. That is now fixed. Finally, some minor cleanups to the debug output to make it more relevant/readable. [1]: https://lists.01.org/pipermail/linux-nvdimm/2015-June/001260.html [2]: https://lists.01.org/pipermail/linux-nvdimm/2015-June/001261.html --- Dan Williams (6): ndctl: quiet ndctl_cmd command debug ndctl: trigger the kernel to re-read labels after zeroing ndctl: add README.md ndctl: nvdimm flags ndctl: improve module binding debug ndctl: update local ndctl.h README.md | 43 ++++++++++ lib/libndctl.c | 193 +++++++++++++++++++++++++++++++++++++------ lib/libndctl.sym | 8 ++ lib/ndctl/libndctl.h | 8 ++ lib/test-libndctl.c | 225 ++++++++++++++++++++++++++++++++++++++++++-------- ndctl.h | 12 +-- 6 files changed, 420 insertions(+), 69 deletions(-) create mode 100644 README.md

6 years

1
6
0 / 0

[PATCH v6 00/21] libnvdimm: non-volatile memory devices

by Dan Williams

A new sub-system in support of non-volatile memory storage devices. See "[PATCH v6 21/21] libnvdimm: Non-Volatile Devices" for an overview. Changes since v5 [1]: 1/ Add rationale/justification to the changelog for "[PATCH v6 20/21] tools/testing/nvdimm: libnvdimm unit test infrastructure". Explain why QEMU is not suitable. (Christoph) 2/ Expand the changelog of "[PATCH v6 18/21] nd_btt: atomic sector updates" to give the reasoning behind architecture decisions related to scaling. (Christoph) 3/ Introduce ->rw_bytes() to struct block_device_operations and kill off the "ndio" implementation (save a couple hundred lines of glue code). (Christoph) 4/ Kill usage of __iomem in the namespace label implementation in favor of properly using byte-order helpers. (Christoph) 5/ Kill the include path munging in "[PATCH v6 20/21] tools/testing/nvdimm: libnvdimm unit test infrastructure" this makes the unit test implementation have near zero impact on the libnvdimm code base. (Christoph) 6/ Miscellaneous 80 column fixups. (Christoph) 7/ Restore BLK_DEV and PHYS_ADDR_T_64BIT dependencies to LIBNVDIMM. Diffstat since v5 [1]: "ebba6912e36e libnvdimm: Non-Volatile Devices" [1]: https://lists.01.org/pipermail/linux-nvdimm/2015-June/001035.html drivers/acpi/Makefile | 1 - drivers/acpi/nfit.c | 228 +++++++++++++++++++++----------------- drivers/acpi/nfit.h | 20 ++-- drivers/nvdimm/Kconfig | 6 +- drivers/nvdimm/Makefile | 1 - drivers/nvdimm/blk.c | 39 +++---- drivers/nvdimm/btt.c | 85 ++++++++------- drivers/nvdimm/btt_devs.c | 163 +++++++++++++-------------- drivers/nvdimm/bus.c | 156 +++++++++++--------------- drivers/nvdimm/core.c | 72 ++---------- drivers/nvdimm/dimm.c | 4 +- drivers/nvdimm/dimm_devs.c | 31 +++--- drivers/nvdimm/label.c | 284 ++++++++++++++++++++++++------------------------ drivers/nvdimm/label.h | 8 +- drivers/nvdimm/namespace_devs.c | 142 ++++++++++++------------ drivers/nvdimm/nd-core.h | 28 +++-- drivers/nvdimm/nd.h | 113 ++----------------- drivers/nvdimm/pmem.c | 38 +++---- drivers/nvdimm/region.c | 2 +- drivers/nvdimm/region_devs.c | 90 +++++++-------- include/linux/blkdev.h | 44 ++++++++ include/linux/libnvdimm.h | 14 ++- include/uapi/linux/ndctl.h | 8 +- tools/testing/nvdimm/Kbuild | 2 - tools/testing/nvdimm/test/nfit.c | 63 ++++++----- tools/testing/nvdimm/test/nfit_test.h | 3 +- 26 files changed, 768 insertions(+), 877 deletions(-) --- [PATCH v6 01/21] e820, efi: add ACPI 6.0 persistent memory types [PATCH v6 02/21] libnvdimm, nfit: initial libnvdimm infrastructure and NFIT support [PATCH v6 03/21] libnvdimm: control character device and nvdimm_bus sysfs attributes [PATCH v6 04/21] libnvdimm, nfit: dimm/memory-devices [PATCH v6 05/21] libnvdimm: control (ioctl) messages for nvdimm_bus and nvdimm devices [PATCH v6 06/21] libnvdimm, nvdimm: dimm driver and base libnvdimm device-driver infrastructure [PATCH v6 07/21] libnvdimm, nfit: regions (block-data-window, persistent memory, volatile memory) [PATCH v6 08/21] libnvdimm: support for legacy (non-aliasing) nvdimms [PATCH v6 09/21] libnvdimm, pmem: move pmem to drivers/nvdimm/ [PATCH v6 10/21] libnvdimm, pmem: add libnvdimm support to the pmem driver [PATCH v6 11/21] libnvdimm, nfit: add interleave-set state-tracking infrastructure [PATCH v6 12/21] libnvdimm: namespace indices: read and validate [PATCH v6 13/21] libnvdimm: pmem label sets and namespace instantiation. [PATCH v6 14/21] libnvdimm: blk labels and namespace instantiation [PATCH v6 15/21] libnvdimm: write pmem label set [PATCH v6 16/21] libnvdimm: write blk label set [PATCH v6 17/21] libnvdimm: infrastructure for btt devices [PATCH v6 18/21] nd_btt: atomic sector updates [PATCH v6 19/21] libnvdimm, nfit, nd_blk: driver for BLK-mode access persistent memory [PATCH v6 20/21] tools/testing/nvdimm: libnvdimm unit test infrastructure [PATCH v6 21/21] libnvdimm: Non-Volatile Devices Documentation/nvdimm/btt.txt | 273 +++++ Documentation/nvdimm/nvdimm.txt | 805 ++++++++++++++++ MAINTAINERS | 39 + arch/arm64/kernel/efi.c | 1 arch/ia64/kernel/efi.c | 4 arch/x86/Kconfig | 3 arch/x86/boot/compressed/eboot.c | 4 arch/x86/include/uapi/asm/e820.h | 1 arch/x86/kernel/e820.c | 28 - arch/x86/kernel/pmem.c | 92 +- arch/x86/platform/efi/efi.c | 3 drivers/Kconfig | 2 drivers/Makefile | 1 drivers/acpi/Kconfig | 26 + drivers/acpi/Makefile | 1 drivers/acpi/nfit.c | 1546 ++++++++++++++++++++++++++++++ drivers/acpi/nfit.h | 155 +++ drivers/block/Kconfig | 11 drivers/block/Makefile | 1 drivers/nvdimm/Kconfig | 75 + drivers/nvdimm/Makefile | 20 drivers/nvdimm/blk.c | 241 +++++ drivers/nvdimm/btt.c | 1449 ++++++++++++++++++++++++++++ drivers/nvdimm/btt.h | 186 ++++ drivers/nvdimm/btt_devs.c | 432 ++++++++ drivers/nvdimm/bus.c | 746 ++++++++++++++ drivers/nvdimm/core.c | 416 ++++++++ drivers/nvdimm/dimm.c | 115 ++ drivers/nvdimm/dimm_devs.c | 517 ++++++++++ drivers/nvdimm/label.c | 926 ++++++++++++++++++ drivers/nvdimm/label.h | 141 +++ drivers/nvdimm/namespace_devs.c | 1698 +++++++++++++++++++++++++++++++++ drivers/nvdimm/nd-core.h | 111 ++ drivers/nvdimm/nd.h | 168 +++ drivers/nvdimm/pmem.c | 107 +- drivers/nvdimm/region.c | 189 ++++ drivers/nvdimm/region_devs.c | 667 +++++++++++++ include/linux/blkdev.h | 44 + include/linux/efi.h | 3 include/linux/libnvdimm.h | 139 +++ include/linux/nd.h | 98 ++ include/uapi/linux/Kbuild | 1 include/uapi/linux/ndctl.h | 199 ++++ tools/testing/nvdimm/Kbuild | 35 + tools/testing/nvdimm/Makefile | 7 tools/testing/nvdimm/test/Kbuild | 8 tools/testing/nvdimm/test/iomap.c | 151 +++ tools/testing/nvdimm/test/nfit.c | 1112 ++++++++++++++++++++++ tools/testing/nvdimm/test/nfit_test.h | 29 + 49 files changed, 12934 insertions(+), 92 deletions(-) create mode 100644 Documentation/nvdimm/btt.txt create mode 100644 Documentation/nvdimm/nvdimm.txt create mode 100644 drivers/acpi/nfit.c create mode 100644 drivers/acpi/nfit.h create mode 100644 drivers/nvdimm/Kconfig create mode 100644 drivers/nvdimm/Makefile create mode 100644 drivers/nvdimm/blk.c create mode 100644 drivers/nvdimm/btt.c create mode 100644 drivers/nvdimm/btt.h create mode 100644 drivers/nvdimm/btt_devs.c create mode 100644 drivers/nvdimm/bus.c create mode 100644 drivers/nvdimm/core.c create mode 100644 drivers/nvdimm/dimm.c create mode 100644 drivers/nvdimm/dimm_devs.c create mode 100644 drivers/nvdimm/label.c create mode 100644 drivers/nvdimm/label.h create mode 100644 drivers/nvdimm/namespace_devs.c create mode 100644 drivers/nvdimm/nd-core.h create mode 100644 drivers/nvdimm/nd.h rename drivers/{block/pmem.c => nvdimm/pmem.c} (69%) create mode 100644 drivers/nvdimm/region.c create mode 100644 drivers/nvdimm/region_devs.c create mode 100644 include/linux/libnvdimm.h create mode 100644 include/linux/nd.h create mode 100644 include/uapi/linux/ndctl.h create mode 100644 tools/testing/nvdimm/Kbuild create mode 100644 tools/testing/nvdimm/Makefile create mode 100644 tools/testing/nvdimm/test/Kbuild create mode 100644 tools/testing/nvdimm/test/iomap.c create mode 100644 tools/testing/nvdimm/test/nfit.c create mode 100644 tools/testing/nvdimm/test/nfit_test.h

6 years

3
32
0 / 0

[PATCH v5 00/21] libnvdimm: non-volatile memory devices

by Dan Williams

Changes since v4 [1]: 1/ Rename libnd to libnvdimm, move the implementation from drivers/block/nd to drivers/nvdimm, and replace the "nd" prefix with "nvdimm" where it makes sense. For example, the module name and public header filename for the major library entry points are libnvdimm.ko and libnvdimm.h respectively. The entry points are prefixed with "nvdimm" and the primary bus objects are renamed, i.e. s/nd_bus/nvdimm_bus/ and s/nd_dimm/nvdimm/. The "nd" prefix remains as a short lead-in identifier for implementation internal items that are not nvdimms like regions, commands, labels, etc... (Christoph [2]) 2/ Move the unit test infrastructure to an external module in tools/testing/nvdimm. The linker hack received a strong NAK from Christoph and it is also problematic that an "allmodconfig" build would result in including the mocked symbols. With the move and conversion to an external module we keep the unit tests in tree where they can be maintained effectively without impacting production builds. (Christoph [2]) 3/ Fixup some miscellaneous 0day sparse reports [3] 4/ Rebased on top of linux-pm.git/acpica (Rafael [4]) [1]: https://lists.01.org/pipermail/linux-nvdimm/2015-May/000804.html [2]: https://lists.01.org/pipermail/linux-nvdimm/2015-May/000923.html [3]: https://lists.01.org/pipermail/linux-nvdimm/2015-May/000983.html [4]: https://lists.01.org/pipermail/linux-nvdimm/2015-May/000921.html Diffstat since v4: Documentation/{blockdev => nvdimm}/btt.txt | 0 .../{blockdev/libnd.txt => nvdimm/nvdimm.txt} | 97 ++++---- drivers/acpi/nfit.c | 148 ++++++------ drivers/acpi/nfit.h | 19 +- drivers/block/nd/Makefile | 29 --- drivers/block/nd/test/Makefile | 5 - drivers/{block/nd => nvdimm}/Kconfig | 42 +--- drivers/nvdimm/Makefile | 21 ++ drivers/{block/nd => nvdimm}/blk.c | 6 +- drivers/{block/nd => nvdimm}/btt.c | 6 +- drivers/{block/nd => nvdimm}/btt.h | 0 drivers/{block/nd => nvdimm}/btt_devs.c | 38 +-- drivers/{block/nd => nvdimm}/bus.c | 258 ++++++++++----------- drivers/{block/nd => nvdimm}/core.c | 196 ++++++++-------- drivers/{block/nd => nvdimm}/dimm.c | 44 ++-- drivers/{block/nd => nvdimm}/dimm_devs.c | 188 +++++++-------- drivers/{block/nd => nvdimm}/label.c | 116 ++++----- drivers/{block/nd => nvdimm}/label.h | 22 +- drivers/{block/nd => nvdimm}/namespace_devs.c | 108 ++++----- drivers/{block/nd => nvdimm}/nd-private.h | 62 +++-- drivers/{block/nd => nvdimm}/nd.h | 44 ++-- drivers/{block/nd => nvdimm}/pmem.c | 6 +- drivers/{block/nd => nvdimm}/region.c | 10 +- drivers/{block/nd => nvdimm}/region_devs.c | 126 +++++----- include/linux/{libnd.h => libnvdimm.h} | 68 +++--- tools/testing/nvdimm/Kbuild | 37 +++ tools/testing/nvdimm/Makefile | 7 + tools/testing/nvdimm/test/Kbuild | 8 + .../block/nd => tools/testing/nvdimm}/test/iomap.c | 0 .../block/nd => tools/testing/nvdimm}/test/nfit.c | 122 +++------- .../nd => tools/testing/nvdimm}/test/nfit_test.h | 0 31 files changed, 895 insertions(+), 938 deletions(-) rename Documentation/{blockdev => nvdimm}/btt.txt (100%) rename Documentation/{blockdev/libnd.txt => nvdimm/nvdimm.txt} (92%) delete mode 100644 drivers/block/nd/Makefile delete mode 100644 drivers/block/nd/test/Makefile rename drivers/{block/nd => nvdimm}/Kconfig (72%) create mode 100644 drivers/nvdimm/Makefile rename drivers/{block/nd => nvdimm}/blk.c (98%) rename drivers/{block/nd => nvdimm}/btt.c (99%) rename drivers/{block/nd => nvdimm}/btt.h (100%) rename drivers/{block/nd => nvdimm}/btt_devs.c (90%) rename drivers/{block/nd => nvdimm}/bus.c (68%) rename drivers/{block/nd => nvdimm}/core.c (62%) rename drivers/{block/nd => nvdimm}/dimm.c (71%) rename drivers/{block/nd => nvdimm}/dimm_devs.c (69%) rename drivers/{block/nd => nvdimm}/label.c (89%) rename drivers/{block/nd => nvdimm}/label.h (87%) rename drivers/{block/nd => nvdimm}/namespace_devs.c (94%) rename drivers/{block/nd => nvdimm}/nd-private.h (57%) rename drivers/{block/nd => nvdimm}/nd.h (86%) rename drivers/{block/nd => nvdimm}/pmem.c (99%) rename drivers/{block/nd => nvdimm}/region.c (96%) rename drivers/{block/nd => nvdimm}/region_devs.c (83%) rename include/linux/{libnd.h => libnvdimm.h} (62%) create mode 100644 tools/testing/nvdimm/Kbuild create mode 100644 tools/testing/nvdimm/Makefile create mode 100644 tools/testing/nvdimm/test/Kbuild rename {drivers/block/nd => tools/testing/nvdimm}/test/iomap.c (100%) rename {drivers/block/nd => tools/testing/nvdimm}/test/nfit.c (91%) rename {drivers/block/nd => tools/testing/nvdimm}/test/nfit_test.h (100%) --- Dan Williams (18): e820, efi: add ACPI 6.0 persistent memory types libnvdimm, nfit: initial libnvdimm infrastructure and NFIT support libnvdimm: control character device and libnvdimm bus sysfs attributes libnvdimm, nfit: dimm/memory-devices libnvdimm: control (ioctl) messages for libnvdimm bus and dimm devices libnvdimm, nvdimm: dimm driver and base libnvdimm device-driver infrastructure libnvdimm, nfit: regions (block-data-window, persistent memory, volatile memory) libnvdimm: support for legacy (non-aliasing) nvdimms libnvdimm, nd_pmem: add libnvdimm support to the pmem driver libnvdimm, nfit: add interleave-set state-tracking infrastructure libnvdimm: namespace indices: read and validate libnvdimm: pmem label sets and namespace instantiation. libnvdimm: blk labels and namespace instantiation libnvdimm: write pmem label set libnvdimm: write blk label set libnvdimm: infrastructure for btt devices tools/testing/nvdimm: manufactured NFITs for interface development libnvdimm: Non-Volatile Devices Ross Zwisler (2): pmem: Dynamically allocate partition numbers libnvdimm, nfit, nd_blk: driver for BLK-mode access persistent memory Vishal Verma (1): nd_btt: atomic sector updates Documentation/nvdimm/btt.txt | 273 +++++ Documentation/nvdimm/nvdimm.txt | 805 ++++++++++++++++ MAINTAINERS | 39 + arch/arm64/kernel/efi.c | 1 arch/ia64/kernel/efi.c | 4 arch/x86/Kconfig | 4 arch/x86/boot/compressed/eboot.c | 4 arch/x86/include/uapi/asm/e820.h | 1 arch/x86/kernel/e820.c | 28 - arch/x86/kernel/pmem.c | 92 +- arch/x86/platform/efi/efi.c | 3 drivers/Kconfig | 2 drivers/Makefile | 1 drivers/acpi/Kconfig | 27 + drivers/acpi/Makefile | 2 drivers/acpi/nfit.c | 1474 +++++++++++++++++++++++++++++ drivers/acpi/nfit.h | 161 +++ drivers/block/Kconfig | 11 drivers/block/Makefile | 1 drivers/nvdimm/Kconfig | 79 ++ drivers/nvdimm/Makefile | 21 drivers/nvdimm/blk.c | 252 +++++ drivers/nvdimm/btt.c | 1440 ++++++++++++++++++++++++++++ drivers/nvdimm/btt.h | 186 ++++ drivers/nvdimm/btt_devs.c | 443 +++++++++ drivers/nvdimm/bus.c | 770 +++++++++++++++ drivers/nvdimm/core.c | 472 +++++++++ drivers/nvdimm/dimm.c | 115 ++ drivers/nvdimm/dimm_devs.c | 516 ++++++++++ drivers/nvdimm/label.c | 926 ++++++++++++++++++ drivers/nvdimm/label.h | 143 +++ drivers/nvdimm/namespace_devs.c | 1702 +++++++++++++++++++++++++++++++++ drivers/nvdimm/nd-private.h | 107 ++ drivers/nvdimm/nd.h | 261 +++++ drivers/nvdimm/pmem.c | 107 +- drivers/nvdimm/region.c | 189 ++++ drivers/nvdimm/region_devs.c | 667 +++++++++++++ include/linux/efi.h | 3 include/linux/libnvdimm.h | 131 +++ include/linux/nd.h | 98 ++ include/uapi/linux/Kbuild | 1 include/uapi/linux/ndctl.h | 199 ++++ tools/testing/nvdimm/Kbuild | 37 + tools/testing/nvdimm/Makefile | 7 tools/testing/nvdimm/test/Kbuild | 8 tools/testing/nvdimm/test/iomap.c | 151 +++ tools/testing/nvdimm/test/nfit.c | 1101 +++++++++++++++++++++ tools/testing/nvdimm/test/nfit_test.h | 28 + 48 files changed, 13004 insertions(+), 89 deletions(-) create mode 100644 Documentation/nvdimm/btt.txt create mode 100644 Documentation/nvdimm/nvdimm.txt create mode 100644 drivers/acpi/nfit.c create mode 100644 drivers/acpi/nfit.h create mode 100644 drivers/nvdimm/Kconfig create mode 100644 drivers/nvdimm/Makefile create mode 100644 drivers/nvdimm/blk.c create mode 100644 drivers/nvdimm/btt.c create mode 100644 drivers/nvdimm/btt.h create mode 100644 drivers/nvdimm/btt_devs.c create mode 100644 drivers/nvdimm/bus.c create mode 100644 drivers/nvdimm/core.c create mode 100644 drivers/nvdimm/dimm.c create mode 100644 drivers/nvdimm/dimm_devs.c create mode 100644 drivers/nvdimm/label.c create mode 100644 drivers/nvdimm/label.h create mode 100644 drivers/nvdimm/namespace_devs.c create mode 100644 drivers/nvdimm/nd-private.h create mode 100644 drivers/nvdimm/nd.h rename drivers/{block/pmem.c => nvdimm/pmem.c} (70%) create mode 100644 drivers/nvdimm/region.c create mode 100644 drivers/nvdimm/region_devs.c create mode 100644 include/linux/libnvdimm.h create mode 100644 include/linux/nd.h create mode 100644 include/uapi/linux/ndctl.h create mode 100644 tools/testing/nvdimm/Kbuild create mode 100644 tools/testing/nvdimm/Makefile create mode 100644 tools/testing/nvdimm/test/Kbuild create mode 100644 tools/testing/nvdimm/test/iomap.c create mode 100644 tools/testing/nvdimm/test/nfit.c create mode 100644 tools/testing/nvdimm/test/nfit_test.h

6 years

8
46
0 / 0

[PATCH v3 0/6] pmem api, generic ioremap_cache, and memremap

by Dan Williams

The pmem api is responsible for shepherding data out to persistent media. The pmem driver uses this api, when available, to assert that data is durable by the time bio_endio() is invoked. When an architecture or cpu can not make persistence guarantees the driver warns and falls back to "best effort" implementation. Changes since v2 [1]: 1/ Rebased on bp.git/tip-mm-2 (pat cleanups from Boris and ioremap_wt from Toshi). 2/ Fixes for build breakage caught by 0day. 3/ Rework IORESOURCE_CACHEABLE to allow it to be safely used in devm_ioremap_resource(). (Arnd) 4/ Rename pmem apis from persistent_<action> to <action>_pmem (Boaz) 5/ Introduce the __pmem annotation to let sparse check proper handling of a pointer to pmem. 6/ Unify the ioremap function prototype on: ioremap(resource_size_t offset, unsigned long size) ...across all archs. 7/ Limit the memremap apis to memremap_wt() and memremap_cache(), add ARCH_HAS_MEMREMAP to allow drivers to skip architectures where the return value from ioremap() is not a simple pointer to memory, and catch attempts to memremap addresses that are covered by the kernel's linear mapping. (Arnd) --- Dan Williams (5): arch: unify ioremap prototypes and macro aliases cleanup IORESOURCE_CACHEABLE vs ioremap() arch/*/asm/io.h: add ioremap_cache() to all architectures devm: fix ioremap_cache() usage arch: introduce memremap_cache() and memremap_wt() Ross Zwisler (1): arch, x86: pmem api for ensuring durability of persistent memory updates arch/arc/include/asm/io.h | 1 arch/arm/Kconfig | 1 arch/arm/include/asm/io.h | 2 + arch/arm/mach-clps711x/board-cdb89712.c | 2 - arch/arm64/Kconfig | 1 arch/arm64/include/asm/io.h | 3 + arch/arm64/kernel/efi.c | 4 + arch/arm64/kernel/smp_spin_table.c | 10 ++- arch/avr32/include/asm/io.h | 1 arch/cris/include/asm/io.h | 8 +- arch/cris/mm/ioremap.c | 6 +- arch/frv/Kconfig | 1 arch/frv/include/asm/io.h | 6 ++ arch/ia64/include/asm/io.h | 9 +-- arch/ia64/mm/ioremap.c | 4 + arch/m32r/include/asm/io.h | 1 arch/m68k/Kconfig | 1 arch/m68k/include/asm/io_mm.h | 7 ++ arch/m68k/include/asm/io_no.h | 5 ++ arch/metag/Kconfig | 1 arch/metag/include/asm/io.h | 5 ++ arch/microblaze/include/asm/io.h | 1 arch/mips/Kconfig | 1 arch/mips/include/asm/io.h | 17 ++++- arch/mn10300/include/asm/io.h | 1 arch/nios2/include/asm/io.h | 1 arch/powerpc/Kconfig | 1 arch/powerpc/include/asm/io.h | 2 - arch/powerpc/kernel/pci_of_scan.c | 2 - arch/s390/include/asm/io.h | 1 arch/sparc/include/asm/io_32.h | 1 arch/sparc/include/asm/io_64.h | 9 ++- arch/sparc/kernel/pci.c | 3 - arch/tile/include/asm/io.h | 1 arch/x86/Kconfig | 2 + arch/x86/include/asm/cacheflush.h | 36 +++++++++++ arch/x86/include/asm/io.h | 7 ++ arch/x86/kernel/crash_dump_64.c | 6 +- arch/x86/kernel/kdebugfs.c | 8 +- arch/x86/kernel/ksysfs.c | 28 ++++----- arch/x86/mm/ioremap.c | 12 ++-- arch/xtensa/Kconfig | 1 arch/xtensa/include/asm/io.h | 3 + drivers/acpi/apei/einj.c | 8 +- drivers/acpi/apei/erst.c | 4 + drivers/block/Kconfig | 1 drivers/block/pmem.c | 76 +++++++++++++++++++++-- drivers/firmware/google/memconsole.c | 4 + drivers/pci/probe.c | 3 - drivers/pnp/manager.c | 2 - drivers/scsi/aic94xx/aic94xx_init.c | 7 -- drivers/scsi/arcmsr/arcmsr_hba.c | 5 -- drivers/scsi/mvsas/mv_init.c | 15 +---- drivers/video/fbdev/ocfb.c | 1 include/asm-generic/io.h | 8 ++ include/asm-generic/iomap.h | 4 + include/linux/compiler.h | 2 + include/linux/device.h | 5 ++ include/linux/io.h | 6 ++ include/linux/pmem.h | 102 +++++++++++++++++++++++++++++++ kernel/resource.c | 41 ++++++++++++ lib/Kconfig | 8 ++ lib/devres.c | 48 ++++++--------- lib/pci_iomap.c | 7 +- 64 files changed, 441 insertions(+), 139 deletions(-) create mode 100644 include/linux/pmem.h

6 years

2
12
0 / 0

[PATCH 0/3] Add NUMA support for NVDIMM devices

by Toshi Kani

Since NVDIMMs are installed on memory slots, they expose the NUMA topology of a platform. This patchset adds support of sysfs 'numa_node' to the NVDIMM devices under /sys/bus/nd/devices. With this change, numactl(8) accepts 'block:' and 'file:' paths of pmem and btt devices as shown in the examples below. numactl --preferred block:pmem0 --show numactl --preferred file:/dev/pmem0s --show Here is a result of fio benchmark to ext4/dax on pmem0 using numactl on an HP DL380 with 2 sockets; pmem0 on node 0, and pmem1 on node 1. Local [1] : 4098.3MB/s Remote [2]: 3718.4MB/s [1] numactl --preferred block:pmem0 --cpunodebind block:pmem0 fio <fs-on-pmem0> [2] numactl --preferred block:pmem1 --cpunodebind block:pmem1 fio <fs-on-pmem0> Patch 1/3-2/3 apply on top of the acpica branch of the pm tree. Patch 3/3 applies on top of Dan Williams's v5 patch series of "libnvdimm: non-volatile memory devices". --- Toshi Kani (3): 1/3 acpi: Fix acpi_map_pxm_to_node() to handle numa_off 2/3 acpi: Add export to acpi_map_pxm_to_node() 3/3 libnvdimm: Add sysfs numa_node to NVDIMM devices --- drivers/acpi/nfit.c | 2 ++ drivers/acpi/numa.c | 13 ++++++++++--- drivers/nvdimm/btt.c | 2 ++ drivers/nvdimm/bus.c | 12 ++++++++++++ drivers/nvdimm/nd.h | 1 + drivers/nvdimm/region.c | 1 + drivers/nvdimm/region_devs.c | 1 + include/linux/acpi.h | 5 +++++ include/linux/libnvdimm.h | 1 + 9 files changed, 35 insertions(+), 3 deletions(-)

6 years

2
7
0 / 0

[Linux-nvdimm] [PATCH v2 00/10] evacuate struct page from the block layer, introduce __pfn_t

by Dan Williams

Changes since v1 [1]: 1/ added include/asm-generic/pfn.h for the __pfn_t definition and helpers. 2/ added kmap_atomic_pfn_t() 3/ rebased on v4.1-rc2 [1]: http://marc.info/?l=linux-kernel&m=142653770511970&w=2 --- A lead in note, this looks scarier than it is. Most of the code thrash is automated via Coccinelle. Also the subtle differences behind an 'unsigned long pfn' and a '__pfn_t' are mitigated by type-safety and a Kconfig option (default disabled CONFIG_PMEM_IO) that globally controls whether a pfn and a __pfn_t are equivalent. The motivation for this change is persistent memory and the desire to use it not only via the pmem driver, but also as a memory target for I/O (DAX, O_DIRECT, DMA, RDMA, etc) in other parts of the kernel. Aside from the pmem driver and DAX, persistent memory is not able to be used in these I/O scenarios due to the lack of a backing struct page, i.e. persistent memory is not part of the memmap. This patchset takes the position that the solution is to teach I/O paths that want to operate on persistent memory to do so by referencing a __pfn_t. The alternatives are discussed in the changelog for "[PATCH v2 01/10] arch: introduce __pfn_t for persistent memory i/o", copied here: Alternatives: 1/ Provide struct page coverage for persistent memory in DRAM. The expectation is that persistent memory capacities make this untenable in the long term. 2/ Provide struct page coverage for persistent memory with persistent memory. While persistent memory may have near DRAM performance characteristics it may not have the same write-endurance of DRAM. Given the update frequency of struct page objects it may not be suitable for persistent memory. 3/ Dynamically allocate struct page. This appears to be on the order of the complexity of converting code paths to use __pfn_t references instead of struct page, and the amount of setup required to establish a valid struct page reference is mostly wasted when the only usage in the block stack is to perform a page_to_pfn() conversion for dma-mapping. Instances of kmap() / kmap_atomic() usage appear to be the only occasions in the block stack where struct page is non-trivially used. A new kmap_atomic_pfn_t() is proposed to handle those cases. --- Dan Williams (9): arch: introduce __pfn_t for persistent memory i/o block: add helpers for accessing a bio_vec page block: convert .bv_page to .bv_pfn bio_vec dma-mapping: allow archs to optionally specify a ->map_pfn() operation scatterlist: use sg_phys() x86: support dma_map_pfn() x86: support kmap_atomic_pfn_t() for persistent memory dax: convert to __pfn_t block: base support for pfn i/o Matthew Wilcox (1): scatterlist: support "page-less" (__pfn_t only) entries arch/Kconfig | 6 ++ arch/arm/mm/dma-mapping.c | 2 - arch/microblaze/kernel/dma.c | 2 - arch/powerpc/sysdev/axonram.c | 6 +- arch/x86/Kconfig | 7 ++ arch/x86/kernel/Makefile | 1 arch/x86/kernel/amd_gart_64.c | 22 +++++- arch/x86/kernel/kmap.c | 95 ++++++++++++++++++++++++++ arch/x86/kernel/pci-nommu.c | 22 +++++- arch/x86/kernel/pci-swiotlb.c | 4 + arch/x86/pci/sta2x11-fixup.c | 4 + arch/x86/xen/pci-swiotlb-xen.c | 4 + block/bio-integrity.c | 8 +- block/bio.c | 82 ++++++++++++++++------ block/blk-core.c | 13 +++- block/blk-integrity.c | 7 +- block/blk-lib.c | 2 - block/blk-merge.c | 15 ++-- block/bounce.c | 26 ++++--- drivers/block/aoe/aoecmd.c | 8 +- drivers/block/brd.c | 6 +- drivers/block/drbd/drbd_bitmap.c | 5 + drivers/block/drbd/drbd_main.c | 6 +- drivers/block/drbd/drbd_receiver.c | 4 + drivers/block/drbd/drbd_worker.c | 3 + drivers/block/floppy.c | 6 +- drivers/block/loop.c | 13 ++-- drivers/block/nbd.c | 8 +- drivers/block/nvme-core.c | 2 - drivers/block/pktcdvd.c | 11 ++- drivers/block/pmem.c | 16 +++- drivers/block/ps3disk.c | 2 - drivers/block/ps3vram.c | 2 - drivers/block/rbd.c | 2 - drivers/block/rsxx/dma.c | 2 - drivers/block/umem.c | 2 - drivers/block/zram/zram_drv.c | 10 +-- drivers/dma/ste_dma40.c | 5 - drivers/iommu/amd_iommu.c | 21 ++++-- drivers/iommu/intel-iommu.c | 26 +++++-- drivers/iommu/iommu.c | 2 - drivers/md/bcache/btree.c | 4 + drivers/md/bcache/debug.c | 6 +- drivers/md/bcache/movinggc.c | 2 - drivers/md/bcache/request.c | 6 +- drivers/md/bcache/super.c | 10 +-- drivers/md/bcache/util.c | 5 + drivers/md/bcache/writeback.c | 2 - drivers/md/dm-crypt.c | 12 ++- drivers/md/dm-io.c | 2 - drivers/md/dm-log-writes.c | 14 ++-- drivers/md/dm-verity.c | 2 - drivers/md/raid1.c | 50 +++++++------- drivers/md/raid10.c | 38 +++++----- drivers/md/raid5.c | 6 +- drivers/mmc/card/queue.c | 4 + drivers/s390/block/dasd_diag.c | 2 - drivers/s390/block/dasd_eckd.c | 14 ++-- drivers/s390/block/dasd_fba.c | 6 +- drivers/s390/block/dcssblk.c | 8 +- drivers/s390/block/scm_blk.c | 2 - drivers/s390/block/scm_blk_cluster.c | 2 - drivers/s390/block/xpram.c | 2 - drivers/scsi/mpt2sas/mpt2sas_transport.c | 6 +- drivers/scsi/mpt3sas/mpt3sas_transport.c | 6 +- drivers/scsi/sd_dif.c | 4 + drivers/staging/android/ion/ion_chunk_heap.c | 4 + drivers/staging/lustre/lustre/llite/lloop.c | 2 - drivers/target/target_core_file.c | 4 + drivers/xen/biomerge.c | 4 + drivers/xen/swiotlb-xen.c | 29 +++++--- fs/9p/vfs_addr.c | 2 - fs/block_dev.c | 2 - fs/btrfs/check-integrity.c | 6 +- fs/btrfs/compression.c | 12 ++- fs/btrfs/disk-io.c | 5 + fs/btrfs/extent_io.c | 8 +- fs/btrfs/file-item.c | 8 +- fs/btrfs/inode.c | 19 +++-- fs/btrfs/raid56.c | 4 + fs/btrfs/volumes.c | 2 - fs/buffer.c | 4 + fs/dax.c | 9 +- fs/direct-io.c | 2 - fs/exofs/ore.c | 4 + fs/exofs/ore_raid.c | 2 - fs/ext4/page-io.c | 2 - fs/ext4/readpage.c | 4 + fs/f2fs/data.c | 4 + fs/f2fs/segment.c | 2 - fs/gfs2/lops.c | 4 + fs/jfs/jfs_logmgr.c | 4 + fs/logfs/dev_bdev.c | 10 +-- fs/mpage.c | 2 - fs/splice.c | 2 - include/asm-generic/dma-mapping-common.h | 30 ++++++++ include/asm-generic/memory_model.h | 1 include/asm-generic/pfn.h | 67 ++++++++++++++++++ include/asm-generic/scatterlist.h | 10 +++ include/crypto/scatterwalk.h | 10 +++ include/linux/bio.h | 24 ++++--- include/linux/blk_types.h | 20 +++++ include/linux/blkdev.h | 6 +- include/linux/dma-debug.h | 23 +++++- include/linux/dma-mapping.h | 8 ++ include/linux/highmem.h | 23 ++++++ include/linux/mm.h | 1 include/linux/scatterlist.h | 91 ++++++++++++++++++++++--- include/linux/swiotlb.h | 4 + init/Kconfig | 13 ++++ kernel/power/block_io.c | 2 - lib/dma-debug.c | 10 ++- lib/iov_iter.c | 22 +++--- lib/swiotlb.c | 20 ++++- mm/page_io.c | 10 +-- net/ceph/messenger.c | 2 - 116 files changed, 896 insertions(+), 372 deletions(-) create mode 100644 arch/x86/kernel/kmap.c create mode 100644 include/asm-generic/pfn.h

6 years

15
74
0 / 0

[GIT PULL v4 00/21] libnd: non-volatile memory device support

by Dan Williams

Jens, please pull from... git://git.kernel.org/pub/scm/linux/kernel/git/djbw/nvdimm tags/libnd-for-jens ...to receive the libnd sub-system for the next merge window. This has been through 3 rounds of review. Incremental diffstats and links to previous postings: v1: 39 files changed, 13102 insertions(+), 36 deletions(-) https://lists.01.org/pipermail/linux-nvdimm/2015-April/000484.html v2: 30 files changed, 3166 insertions(+), 3935 deletions(-) https://lists.01.org/pipermail/linux-nvdimm/2015-April/000574.html v3: 33 files changed, 2202 insertions(+), 1233 deletions(-) https://lists.01.org/pipermail/linux-nvdimm/2015-May/000804.html v4: Full diffstat since v3 Documentation/blockdev/libnd.txt | 2 +- arch/x86/Kconfig | 4 ++ arch/x86/kernel/pmem.c | 92 +++++++++++++++++++++++------------ drivers/acpi/nfit.c | 20 ++++---- drivers/acpi/nfit.h | 4 +- drivers/block/Kconfig | 8 --- drivers/block/Makefile | 1 - drivers/block/e820_pmem.c | 100 -------------------------------------- drivers/block/nd/Kconfig | 10 ++++ drivers/block/nd/btt.h | 2 +- drivers/block/nd/namespace_devs.c | 5 +- drivers/block/nd/pmem.c | 2 +- drivers/block/nd/test/nfit.c | 10 ++-- include/acpi/acuuid.h | 16 +++--- 14 files changed, 105 insertions(+), 171 deletions(-) delete mode 100644 drivers/block/e820_pmem.c 1/ Kill drivers/block/e820_pmem.c, we can just register pmem regions directly from arch/x86/kernel/pmem.c without need for an intermediary driver (Christoph). 2/ Update to latest NFIT UUID definitions (Toshi). This merges cleanly with, and is identical to the include/acpi/ NFIT enabling in Rafael's linux-pm.git/bleeding-edge branch. 3/ Fix up some miscellaneous checkpatch issues (Robert). This branch has passed a full run through Fengguang's 0-day-kbuild-robot with no outstanding reports, and it passes* our unit tests defined in the ndctl repo (https://github.com/pmem/ndctl). As you can see the magnitude of the review feedback has dropped off precipitously so I feel confident in recommending this branch as a merge candidate. Some general notes and credits appear in the tag-message below. Thanks Jens! * We have a handful of minor features pending behind this release that are exercised in the latest unit tests. However, these patches have been held back to save the libnd review effort from chasing a moving target. === The following changes since commit 4c1eaa2344fb26bb5e936fb4d8ee307343ea0089: drivers/block/pmem: Fix 32-bit build warning in pmem_alloc() (2015-04-01 17:03:57 +0200) are available in the git repository at: git://git.kernel.org/pub/scm/linux/kernel/git/djbw/nvdimm tags/libnd-for-jens for you to fetch changes up to dbcc765a7830454abb78e5352147324605455116: libnd: Non-Volatile Devices (2015-05-27 02:48:52 -0400) ---------------------------------------------------------------- Initial LIBND submission The LIBND sub-system provides generic support for non-volatile memory devices. It extends the kernel's existing X86_PMEM_LEGACY support to also enable devices that conform to the NVDIMM Firmware Interface Table (NFIT) specification published with ACPI 6 (http://www.uefi.org/specifications). NFIT describes devices that may include both a BLK (mmio aperture I/O) mode of operation as well as PMEM (direct cpu load/store to a persistent memory range). In addition to the generic LIBND bus driver implementation and the I/O drivers (BLK and PMEM), a driver for layering atomic sector update semantics on top of byte-addressable-memory, BTT, is also included. See Documentation/blockdev/libnd.txt and Documentation/blockdev/btt.txt for more details. Thanks to: Ross Zwisler, Jeff Moyer, Vishal Verma, Christoph Hellwig, Ingo Molnar, Neil Brown, Boaz Harrosh, Robert Elliott, Matthew Wilcox, Andy Rudoff, Linda Knippers, Toshi Kani, Nicholas Moulin, Rafael Wysocki, and Bob Moore. ---------------------------------------------------------------- Dan Williams (18): e820, efi: add ACPI 6.0 persistent memory types libnd, nfit: initial libnd infrastructure and NFIT support libnd: control character device and libnd bus sysfs attributes libnd, nfit: dimm/memory-devices libnd: control (ioctl) messages for libnd bus and dimm devices libnd, nd_dimm: dimm driver and base libnd device-driver infrastructure libnd, nfit: regions (block-data-window, persistent memory, volatile memory) libnd: support for legacy (non-aliasing) nvdimms libnd, nd_pmem: add libnd support to the pmem driver libnd, nfit: add interleave-set state-tracking infrastructure libnd: namespace indices: read and validate libnd: pmem label sets and namespace instantiation. libnd: blk labels and namespace instantiation libnd: write pmem label set libnd: write blk label set libnd: infrastructure for btt devices nfit-test: manufactured NFITs for interface development libnd: Non-Volatile Devices Ross Zwisler (2): pmem: Dynamically allocate partition numbers libnd, nfit, nd_blk: driver for BLK-mode access persistent memory Vishal Verma (1): nd_btt: atomic sector updates Documentation/blockdev/btt.txt | 273 ++++++ Documentation/blockdev/libnd.txt | 804 ++++++++++++++++++ MAINTAINERS | 39 +- arch/arm64/kernel/efi.c | 1 + arch/ia64/kernel/efi.c | 4 + arch/x86/Kconfig | 4 + arch/x86/boot/compressed/eboot.c | 4 + arch/x86/include/uapi/asm/e820.h | 1 + arch/x86/kernel/e820.c | 28 +- arch/x86/kernel/pmem.c | 92 +- arch/x86/platform/efi/efi.c | 3 + drivers/acpi/Kconfig | 27 + drivers/acpi/Makefile | 1 + drivers/acpi/nfit.c | 1474 ++++++++++++++++++++++++++++++++ drivers/acpi/nfit.h | 160 ++++ drivers/block/Kconfig | 13 +- drivers/block/Makefile | 2 +- drivers/block/nd/Kconfig | 101 +++ drivers/block/nd/Makefile | 29 + drivers/block/nd/blk.c | 252 ++++++ drivers/block/nd/btt.c | 1438 +++++++++++++++++++++++++++++++ drivers/block/nd/btt.h | 186 ++++ drivers/block/nd/btt_devs.c | 443 ++++++++++ drivers/block/nd/bus.c | 770 +++++++++++++++++ drivers/block/nd/core.c | 472 ++++++++++ drivers/block/nd/dimm.c | 115 +++ drivers/block/nd/dimm_devs.c | 516 +++++++++++ drivers/block/nd/label.c | 922 ++++++++++++++++++++ drivers/block/nd/label.h | 143 ++++ drivers/block/nd/namespace_devs.c | 1702 +++++++++++++++++++++++++++++++++++++ drivers/block/nd/nd-private.h | 111 +++ drivers/block/nd/nd.h | 257 ++++++ drivers/block/{ => nd}/pmem.c | 107 ++- drivers/block/nd/region.c | 189 ++++ drivers/block/nd/region_devs.c | 667 +++++++++++++++ drivers/block/nd/test/Makefile | 5 + drivers/block/nd/test/iomap.c | 151 ++++ drivers/block/nd/test/nfit.c | 1171 +++++++++++++++++++++++++ drivers/block/nd/test/nfit_test.h | 28 + include/acpi/actbl1.h | 154 ++++ include/acpi/acuuid.h | 89 ++ include/linux/efi.h | 3 +- include/linux/libnd.h | 129 +++ include/linux/nd.h | 98 +++ include/uapi/linux/Kbuild | 1 + include/uapi/linux/ndctl.h | 199 +++++ 46 files changed, 13289 insertions(+), 89 deletions(-) create mode 100644 Documentation/blockdev/btt.txt create mode 100644 Documentation/blockdev/libnd.txt create mode 100644 drivers/acpi/nfit.c create mode 100644 drivers/acpi/nfit.h create mode 100644 drivers/block/nd/Kconfig create mode 100644 drivers/block/nd/Makefile create mode 100644 drivers/block/nd/blk.c create mode 100644 drivers/block/nd/btt.c create mode 100644 drivers/block/nd/btt.h create mode 100644 drivers/block/nd/btt_devs.c create mode 100644 drivers/block/nd/bus.c create mode 100644 drivers/block/nd/core.c create mode 100644 drivers/block/nd/dimm.c create mode 100644 drivers/block/nd/dimm_devs.c create mode 100644 drivers/block/nd/label.c create mode 100644 drivers/block/nd/label.h create mode 100644 drivers/block/nd/namespace_devs.c create mode 100644 drivers/block/nd/nd-private.h create mode 100644 drivers/block/nd/nd.h rename drivers/block/{ => nd}/pmem.c (70%) create mode 100644 drivers/block/nd/region.c create mode 100644 drivers/block/nd/region_devs.c create mode 100644 drivers/block/nd/test/Makefile create mode 100644 drivers/block/nd/test/iomap.c create mode 100644 drivers/block/nd/test/nfit.c create mode 100644 drivers/block/nd/test/nfit_test.h create mode 100644 include/acpi/acuuid.h create mode 100644 include/linux/libnd.h create mode 100644 include/linux/nd.h create mode 100644 include/uapi/linux/ndctl.h

6 years

4
33
0 / 0

[PATCH v12 0/10] Support Write-Through mapping on x86

by Toshi Kani

This patchset adds support of Write-Through (WT) mapping on x86. The study below shows that using WT mapping may be useful for non-volatile memory. http://www.hpl.hp.com/techreports/2012/HPL-2012-236.pdf The patchset consists of the following changes. - Patch 1/10 to 6/10 add ioremap_wt() - Patch 7/10 adds pgprot_writethrough() - Patch 8/10 to 9/10 add set_memory_wt() - Patch 10/10 changes the pmem driver to call ioremap_wt() All new/modified interfaces have been tested. The patchset is based on: git://git.kernel.org/pub/scm/linux/kernel/git/bp/bp.git#tip-mm-2 --- v12: - Rebased to bp/bp.git#tip-mm-2 and resolved minor conflicts. - Dropped cleanup patches 1-2 as redone by Boris. v11: - Reordered the refactor changes from patch 10-11 to 1-2. (Borislav Petkov) - Changed BUG() to panic(). (Borislav Petkov) - Rebased to tip/master and resolved conflicts. v10: - Removed ioremap_writethrough(). (Thomas Gleixner) - Clarified and cleaned up multiple comments and functions. (Thomas Gleixner) - Changed ioremap_change_attr() to accept the WT type. v9: - Changed to export the set_xxx_wt() interfaces with GPL. (Ingo Molnar) - Changed is_new_memtype_allowed() to handle WT cases. - Changed arch-specific io.h to define ioremap_wt(). - Changed the pmem driver to use ioremap_wt(). - Rebased to 4.1-rc3 and resolved minor conflicts. v8: - Rebased to 4.0-rc1 and resolved conflicts with 9d34cfdf4 in patch 5/7. v7: - Rebased to 3.19-rc3 as Juergen's patchset for the PAT management has been accepted. v6: - Dropped the patch moving [set|get]_page_memtype() to pat.c since the tip branch already has this change. - Fixed an issue when CONFIG_X86_PAT is not defined. v5: - Clarified comment of why using slot 7. (Andy Lutomirski, Thomas Gleixner) - Moved [set|get]_page_memtype() to pat.c. (Thomas Gleixner) - Removed BUG() from set_page_memtype(). (Thomas Gleixner) v4: - Added set_memory_wt() by adding WT support of regular memory. v3: - Dropped the set_memory_wt() patch. (Andy Lutomirski) - Refactored the !pat_enabled handling. (H. Peter Anvin, Andy Lutomirski) - Added the picture of PTE encoding. (Konrad Rzeszutek Wilk) v2: - Changed WT to use slot 7 of the PAT MSR. (H. Peter Anvin, Andy Lutomirski) - Changed to have conservative checks to exclude all Pentium 2, 3, M, and 4 families. (Ingo Molnar, Henrique de Moraes Holschuh, Andy Lutomirski) - Updated documentation to cover WT interfaces and usages. (Andy Lutomirski, Yigal Korman) --- Toshi Kani (10): 1/10 x86, mm, pat: Set WT to PA7 slot of PAT MSR 2/10 x86, mm, pat: Change reserve_memtype() for WT 3/10 x86, asm: Change is_new_memtype_allowed() for WT 4/10 x86, mm, asm-gen: Add ioremap_wt() for WT 5/10 arch/*/asm/io.h: Add ioremap_wt() to all architectures 6/10 video/fbdev, asm/io.h: Remove ioremap_writethrough() 7/10 x86, mm, pat: Add pgprot_writethrough() for WT 8/10 x86, mm, asm: Add WT support to set_page_memtype() 9/10 x86, mm: Add set_memory_wt() for WT 10/10 drivers/block/pmem: Map NVDIMM with ioremap_wt() --- Documentation/x86/pat.txt | 13 ++-- arch/arc/include/asm/io.h | 1 + arch/arm/include/asm/io.h | 1 + arch/arm64/include/asm/io.h | 1 + arch/avr32/include/asm/io.h | 1 + arch/frv/include/asm/io.h | 4 +- arch/m32r/include/asm/io.h | 1 + arch/m68k/include/asm/io_mm.h | 4 +- arch/m68k/include/asm/io_no.h | 4 +- arch/metag/include/asm/io.h | 3 + arch/microblaze/include/asm/io.h | 2 +- arch/mn10300/include/asm/io.h | 1 + arch/nios2/include/asm/io.h | 1 + arch/s390/include/asm/io.h | 1 + arch/sparc/include/asm/io_32.h | 1 + arch/sparc/include/asm/io_64.h | 1 + arch/tile/include/asm/io.h | 2 +- arch/x86/include/asm/cacheflush.h | 6 +- arch/x86/include/asm/io.h | 2 + arch/x86/include/asm/pgtable.h | 8 ++- arch/x86/include/asm/pgtable_types.h | 3 + arch/x86/mm/ioremap.c | 24 +++++++ arch/x86/mm/pageattr.c | 62 +++++++++++++---- arch/x86/mm/pat.c | 126 +++++++++++++++++++++++++---------- arch/xtensa/include/asm/io.h | 1 + drivers/block/pmem.c | 4 +- drivers/video/fbdev/amifb.c | 4 +- drivers/video/fbdev/atafb.c | 3 +- drivers/video/fbdev/hpfb.c | 4 +- include/asm-generic/io.h | 9 +++ include/asm-generic/iomap.h | 4 ++ include/asm-generic/pgtable.h | 4 ++ 32 files changed, 240 insertions(+), 66 deletions(-)

6 years

4
16
0 / 0

[PATCH v2 0/4] pmem api, generic ioremap_cache, and memremap

by Dan Williams

The pmem api is responsible for shepherding data out to persistent media. The pmem driver uses this api, when available, to assert that data is durable by the time bio_endio() is invoked. When an architecture or cpu can not make persistence guarantees the driver warns and falls back to "best effort" implementation. Changes since v1 [1]: 1/ Rebase on tip/master + Toshi's ioremap_wt() patches and enable ioremap_cache() to be used generically in drivers. Fix devm_ioremap_resource() in the process. 2/ Rather than add yet another instance of "force cast away __iomem for non-io-memory" take the opportunity to introduce memremap() for this use case and fix up the current users that botch their handling of the __iomem annotation. 3/ Mandate that consumers of the pmem api handle the case when archs, or cpus within an arch are not able to make durability guarantees for writes to persistent memory. See pmem_ops in drivers/block/pmem.c 4/ Drop the persistent_flush() api as there are no users until the BLK driver is introduced, and even then it is not a "flush to persistence" it is an invalidation of a previous mmio aperture setting (io_flush_cache_range()). 5/ Add persistent_remap() to the pmem api for the arch to pick its desired memory type that corresponds to the assumptions of persistent_copy() and persistent_sync(). [1]: https://lists.01.org/pipermail/linux-nvdimm/2015-May/000929.html This boots and processes pmem writes on x86, cross-compile 0day results are still pending. --- Dan Williams (3): arch/*/asm/io.h: add ioremap_cache() to all architectures devm: fix ioremap_cache() usage arch: introduce memremap() Ross Zwisler (1): arch, x86: cache management apis for persistent memory arch/arc/include/asm/io.h | 1 arch/arm/include/asm/io.h | 2 + arch/arm64/include/asm/io.h | 2 + arch/arm64/kernel/efi.c | 4 + arch/arm64/kernel/smp_spin_table.c | 10 ++-- arch/avr32/include/asm/io.h | 1 arch/frv/include/asm/io.h | 6 ++ arch/m32r/include/asm/io.h | 1 arch/m68k/include/asm/io_mm.h | 7 +++ arch/m68k/include/asm/io_no.h | 5 ++ arch/metag/include/asm/io.h | 5 ++ arch/microblaze/include/asm/io.h | 1 arch/mn10300/include/asm/io.h | 1 arch/nios2/include/asm/io.h | 1 arch/s390/include/asm/io.h | 1 arch/sparc/include/asm/io_32.h | 1 arch/sparc/include/asm/io_64.h | 1 arch/tile/include/asm/io.h | 1 arch/x86/Kconfig | 1 arch/x86/include/asm/cacheflush.h | 24 +++++++++ arch/x86/include/asm/io.h | 7 +++ arch/x86/kernel/crash_dump_64.c | 6 +- arch/x86/kernel/kdebugfs.c | 8 +-- arch/x86/kernel/ksysfs.c | 28 +++++----- arch/x86/mm/ioremap.c | 10 +--- arch/xtensa/include/asm/io.h | 3 + drivers/acpi/apei/einj.c | 8 +-- drivers/acpi/apei/erst.c | 14 +++-- drivers/block/pmem.c | 62 +++++++++++++++++++++-- drivers/firmware/google/memconsole.c | 4 + include/asm-generic/io.h | 8 +++ include/asm-generic/iomap.h | 4 + include/linux/device.h | 5 ++ include/linux/io.h | 38 ++++++++++++++ include/linux/pmem.h | 93 ++++++++++++++++++++++++++++++++++ lib/Kconfig | 3 + lib/devres.c | 48 ++++++++---------- 37 files changed, 347 insertions(+), 78 deletions(-) create mode 100644 include/linux/pmem.h

6 years

6
18
0 / 0

[PATCH v11 0/12] Support Write-Through mapping on x86

by Toshi Kani

This patchset adds support of Write-Through (WT) mapping on x86. The study below shows that using WT mapping may be useful for non-volatile memory. http://www.hpl.hp.com/techreports/2012/HPL-2012-236.pdf The patchset consists of the following changes. - Patch 1/12 to 2/12 refactor !pat_enable paths - Patch 3/12 to 8/12 add ioremap_wt() - Patch 9/12 adds pgprot_writethrough() - Patch 10/12 to 11/12 add set_memory_wt() - Patch 12/12 changes the pmem driver to call ioremap_wt() All new/modified interfaces have been tested. --- v11: - Reordered the refactor changes from patch 10-11 to 1-2. (Borislav Petkov) - Changed BUG() to panic(). (Borislav Petkov) - Rebased to tip/master and resolved conflicts. v10: - Removed ioremap_writethrough(). (Thomas Gleixner) - Clarified and cleaned up multiple comments and functions. (Thomas Gleixner) - Changed ioremap_change_attr() to accept the WT type. v9: - Changed to export the set_xxx_wt() interfaces with GPL. (Ingo Molnar) - Changed is_new_memtype_allowed() to handle WT cases. - Changed arch-specific io.h to define ioremap_wt(). - Changed the pmem driver to use ioremap_wt(). - Rebased to 4.1-rc3 and resolved minor conflicts. v8: - Rebased to 4.0-rc1 and resolved conflicts with 9d34cfdf4 in patch 5/7. v7: - Rebased to 3.19-rc3 as Juergen's patchset for the PAT management has been accepted. v6: - Dropped the patch moving [set|get]_page_memtype() to pat.c since the tip branch already has this change. - Fixed an issue when CONFIG_X86_PAT is not defined. v5: - Clarified comment of why using slot 7. (Andy Lutomirski, Thomas Gleixner) - Moved [set|get]_page_memtype() to pat.c. (Thomas Gleixner) - Removed BUG() from set_page_memtype(). (Thomas Gleixner) v4: - Added set_memory_wt() by adding WT support of regular memory. v3: - Dropped the set_memory_wt() patch. (Andy Lutomirski) - Refactored the !pat_enabled handling. (H. Peter Anvin, Andy Lutomirski) - Added the picture of PTE encoding. (Konrad Rzeszutek Wilk) v2: - Changed WT to use slot 7 of the PAT MSR. (H. Peter Anvin, Andy Lutomirski) - Changed to have conservative checks to exclude all Pentium 2, 3, M, and 4 families. (Ingo Molnar, Henrique de Moraes Holschuh, Andy Lutomirski) - Updated documentation to cover WT interfaces and usages. (Andy Lutomirski, Yigal Korman) --- Toshi Kani (12): 1/12 x86, mm, pat: Cleanup init flags in pat_init() 2/12 x86, mm, pat: Refactor !pat_enable handling 3/12 x86, mm, pat: Set WT to PA7 slot of PAT MSR 4/12 x86, mm, pat: Change reserve_memtype() for WT 5/12 x86, asm: Change is_new_memtype_allowed() for WT 6/12 x86, mm, asm-gen: Add ioremap_wt() for WT 7/12 arch/*/asm/io.h: Add ioremap_wt() to all architectures 8/12 video/fbdev, asm/io.h: Remove ioremap_writethrough() 9/12 x86, mm, pat: Add pgprot_writethrough() for WT 10/12 x86, mm, asm: Add WT support to set_page_memtype() 11/12 x86, mm: Add set_memory_wt() for WT 12/12 drivers/block/pmem: Map NVDIMM with ioremap_wt() --- Documentation/x86/pat.txt | 13 +- arch/arc/include/asm/io.h | 1 + arch/arm/include/asm/io.h | 1 + arch/arm64/include/asm/io.h | 1 + arch/avr32/include/asm/io.h | 1 + arch/frv/include/asm/io.h | 4 +- arch/m32r/include/asm/io.h | 1 + arch/m68k/include/asm/io_mm.h | 4 +- arch/m68k/include/asm/io_no.h | 4 +- arch/metag/include/asm/io.h | 3 + arch/microblaze/include/asm/io.h | 2 +- arch/mn10300/include/asm/io.h | 1 + arch/nios2/include/asm/io.h | 1 + arch/s390/include/asm/io.h | 1 + arch/sparc/include/asm/io_32.h | 1 + arch/sparc/include/asm/io_64.h | 1 + arch/tile/include/asm/io.h | 2 +- arch/x86/include/asm/cacheflush.h | 6 +- arch/x86/include/asm/io.h | 2 + arch/x86/include/asm/pgtable.h | 8 +- arch/x86/include/asm/pgtable_types.h | 3 + arch/x86/mm/init.c | 6 +- arch/x86/mm/iomap_32.c | 12 +- arch/x86/mm/ioremap.c | 29 ++++- arch/x86/mm/pageattr.c | 65 +++++++--- arch/x86/mm/pat.c | 229 +++++++++++++++++++++++------------ arch/xtensa/include/asm/io.h | 1 + drivers/block/pmem.c | 4 +- drivers/video/fbdev/amifb.c | 4 +- drivers/video/fbdev/atafb.c | 3 +- drivers/video/fbdev/hpfb.c | 4 +- include/asm-generic/io.h | 9 ++ include/asm-generic/iomap.h | 4 + include/asm-generic/pgtable.h | 4 + 34 files changed, 310 insertions(+), 125 deletions(-)

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Linux-nvdimm June 2015