Hi Greg, This is a second round of patches introducing PECI subsystem. I don't think it is ready to be applied right away (we're still missing r-b's), but I hope we have chance to complete discussion in the 5.15 development cycle. I would appreciate if you could take a look. Note: All changes to arch/x86 are contained within patches 01-02, plus small Kconfig change adding "depends on PECI" to GENERIC_LIB_X86 Kconfig in patch 10. The Platform Environment Control Interface (PECI) is a communication interface between Intel processors and management controllers (e.g. Baseboard Management Controller, BMC). This series adds a PECI subsystem and introduces drivers which run in the Linux instance on the management controller (not the main Intel processor) and is intended to be used by the OpenBMC [1], a Linux distribution for BMC devices. The information exposed over PECI (like processor and DIMM temperature) refers to the Intel processor and can be consumed by daemons running on the BMC to, for example, display the processor temperature in its web interface. The PECI bus is collection of code that provides interface support between PECI devices (that actually represent processors) and PECI controllers (such as the "peci-aspeed" controller) that allow to access physical PECI interface. PECI devices are bound to PECI drivers that provides access to PECI services. This series introduces a generic "peci-cpu" driver that exposes hardware monitoring "cputemp" and "dimmtemp" using the auxiliary bus. Exposing "raw" PECI to userspace, either to write userspace drivers or for debug/testing purpose was left out of this series to encourage writing kernel drivers instead, but may be pursued in the future. Introducing PECI to upstream Linux was already attempted before [2]. Since it's been over a year since last revision, and the series changed quite a bit in the meantime, I've decided to start from v1. I would also like to give credit to everyone who helped me with different aspects of preliminary review: - Pierre-Louis Bossart, - Tony Luck, - Andy Shevchenko, - Dave Hansen. [1] https://github.com/openbmc/openbmc [2] https://lore.kernel.org/openbmc/20191211194624.2872-1-jae.hyun.yoo@xxxxxxxxxxxxxxx/ Changes v1 -> v2: Biggest changes when it comes to diffstat are locking in HWMON (I decided to clean things up a bit while adding it), switching to devres usage in more places and exposing sysfs interface in separate patch. * Moved extending X86 ARCHITECTURE MAINTAINERS earlier in series (Dan) * Removed "default n" for GENERIC_LIB_X86 (Dan) * Added vendor prefix for peci-aspeed specific properties (Rob) * Refactored PECI to use devres consistently (Dan) * Added missing sysfs documentation and excluded adding peci-sysfs to separate patch (Dan) * Used module_init() instead of subsys_init() for peci module initialization (Dan) * Removed redundant struct peci_device member (Dan) * Improved PECI Kconfig help (Randy/Dan) * Fixed/removed log messages (Dan, Guenter) * Refactored peci-cputemp and peci-dimmtemp and added missing locks (Guenter) * Removed unused dev_set_drvdata() in peci-cputemp and peci-dimmtemp (Guenter) * Fixed used types, names, fixed broken and added additional comments to peci-hwmon (Guenter, Zev) * Refactored peci-dimmtemp to not return -ETIMEDOUT (Guenter) * Added sanity check for min_peci_revision in peci-hwmon drivers (Zev) * Added assert for DIMM_NUMS_MAX and additional warning in peci-dimmtemp (Zev) * Fixed macro names in peci-aspeed (Zev) * Refactored peci-aspeed sanitizing properties to a single helper function (Zev) * Fixed peci_cpu_device_ids definition for Broadwell Xeon D (David) * Refactor peci_request to use a single allocation (Zev) * Used min_t() to improve code readability (Zev) * Added macro for PECI_RDENDPTCFG_MMIO_WR_LEN_BASE and fixed adev type array name to more descriptive (Zev) * Fixed peci-hwmon commit-msg and documentation (Zev) Thanks -Iwona Iwona Winiarska (13): x86/cpu: Move intel-family to arch-independent headers x86/cpu: Extract cpuid helpers to arch-independent dt-bindings: Add generic bindings for PECI dt-bindings: Add bindings for peci-aspeed ARM: dts: aspeed: Add PECI controller nodes peci: Add core infrastructure peci: Add device detection peci: Add sysfs interface for PECI bus peci: Add support for PECI device drivers peci: Add peci-cpu driver hwmon: peci: Add cputemp driver hwmon: peci: Add dimmtemp driver docs: Add PECI documentation Jae Hyun Yoo (2): peci: Add peci-aspeed controller driver docs: hwmon: Document PECI drivers Documentation/ABI/testing/sysfs-bus-peci | 16 + .../devicetree/bindings/peci/peci-aspeed.yaml | 109 ++++ .../bindings/peci/peci-controller.yaml | 33 + Documentation/hwmon/index.rst | 2 + Documentation/hwmon/peci-cputemp.rst | 90 +++ Documentation/hwmon/peci-dimmtemp.rst | 57 ++ Documentation/index.rst | 1 + Documentation/peci/index.rst | 16 + Documentation/peci/peci.rst | 48 ++ MAINTAINERS | 32 + arch/arm/boot/dts/aspeed-g4.dtsi | 14 + arch/arm/boot/dts/aspeed-g5.dtsi | 14 + arch/arm/boot/dts/aspeed-g6.dtsi | 14 + arch/x86/Kconfig | 1 + arch/x86/include/asm/cpu.h | 3 - arch/x86/include/asm/intel-family.h | 141 +--- arch/x86/include/asm/microcode.h | 2 +- arch/x86/kvm/cpuid.h | 3 +- arch/x86/lib/Makefile | 2 +- drivers/Kconfig | 3 + drivers/Makefile | 1 + drivers/edac/mce_amd.c | 3 +- drivers/hwmon/Kconfig | 2 + drivers/hwmon/Makefile | 1 + drivers/hwmon/peci/Kconfig | 31 + drivers/hwmon/peci/Makefile | 7 + drivers/hwmon/peci/common.h | 58 ++ drivers/hwmon/peci/cputemp.c | 591 +++++++++++++++++ drivers/hwmon/peci/dimmtemp.c | 614 ++++++++++++++++++ drivers/peci/Kconfig | 37 ++ drivers/peci/Makefile | 10 + drivers/peci/controller/Kconfig | 16 + drivers/peci/controller/Makefile | 3 + drivers/peci/controller/peci-aspeed.c | 445 +++++++++++++ drivers/peci/core.c | 238 +++++++ drivers/peci/cpu.c | 344 ++++++++++ drivers/peci/device.c | 221 +++++++ drivers/peci/internal.h | 137 ++++ drivers/peci/request.c | 477 ++++++++++++++ drivers/peci/sysfs.c | 82 +++ include/linux/peci-cpu.h | 38 ++ include/linux/peci.h | 110 ++++ include/linux/x86/cpu.h | 9 + include/linux/x86/intel-family.h | 146 +++++ lib/Kconfig | 4 + lib/Makefile | 2 + lib/x86/Makefile | 3 + {arch/x86/lib => lib/x86}/cpu.c | 2 +- 48 files changed, 4084 insertions(+), 149 deletions(-) create mode 100644 Documentation/ABI/testing/sysfs-bus-peci create mode 100644 Documentation/devicetree/bindings/peci/peci-aspeed.yaml create mode 100644 Documentation/devicetree/bindings/peci/peci-controller.yaml create mode 100644 Documentation/hwmon/peci-cputemp.rst create mode 100644 Documentation/hwmon/peci-dimmtemp.rst create mode 100644 Documentation/peci/index.rst create mode 100644 Documentation/peci/peci.rst create mode 100644 drivers/hwmon/peci/Kconfig create mode 100644 drivers/hwmon/peci/Makefile create mode 100644 drivers/hwmon/peci/common.h create mode 100644 drivers/hwmon/peci/cputemp.c create mode 100644 drivers/hwmon/peci/dimmtemp.c create mode 100644 drivers/peci/Kconfig create mode 100644 drivers/peci/Makefile create mode 100644 drivers/peci/controller/Kconfig create mode 100644 drivers/peci/controller/Makefile create mode 100644 drivers/peci/controller/peci-aspeed.c create mode 100644 drivers/peci/core.c create mode 100644 drivers/peci/cpu.c create mode 100644 drivers/peci/device.c create mode 100644 drivers/peci/internal.h create mode 100644 drivers/peci/request.c create mode 100644 drivers/peci/sysfs.c create mode 100644 include/linux/peci-cpu.h create mode 100644 include/linux/peci.h create mode 100644 include/linux/x86/cpu.h create mode 100644 include/linux/x86/intel-family.h create mode 100644 lib/x86/Makefile rename {arch/x86/lib => lib/x86}/cpu.c (95%) -- 2.31.1
