From: Shiju Jose <shiju.jose@xxxxxxxxxx> 1. Add support for CXL feature mailbox commands. 2. Add CXL device scrub driver supporting patrol scrub control and DDR5 ECS control features. 3. Add scrub driver supports configuring memory scrubs in the system. 4. Add scrub attributes for DDR5 ECS control to the memory scrub driver. 5. Register CXL device patrol scrub and ECS with scrub control driver. 6. Add documentation for CXL memory device scrub control attributes. The QEMU series to support these features is available here, https://lore.kernel.org/qemu-devel/20231114124711.1128-1-shiju.jose@xxxxxxxxxx/T/#t Changes v1 -> v2: 1. Changes for comments from Dave Jiang, Thanks. - Split patches. - reversed xmas tree declarations. - declared flags as enums. - removed few unnecessary variable initializations. - replaced PTR_ERR_OR_ZERO() with IS_ERR() and PTR_ERR(). - add auto clean declarations. - replaced while loop with for loop. - Removed allocation from cxl_get_supported_features() and cxl_get_feature() and make change to take allocated memory pointer from the caller. - replaced if/else with switch case. - replaced sprintf() with sysfs_emit() in 2 places. - replaced goto label with return in few functions. 2. removed unused code for supported attributes from ecs. 3. Included following common dependency patch for scrub configure driver to this series. "memory: scrub: Add scrub driver supports configuring memory scrubbers in the system" Shiju Jose (10): cxl/mbox: Add GET_SUPPORTED_FEATURES mailbox command cxl/mbox: Add GET_FEATURE mailbox command cxl/mbox: Add SET_FEATURE mailbox command cxl/memscrub: Add CXL device patrol scrub control feature cxl/memscrub: Add CXL device DDR5 ECS control feature memory: scrub: Add scrub driver supports configuring memory scrubbers in the system cxl/memscrub: Register CXL device patrol scrub with scrub configure driver memory: scrub: Add scrub control attributes for the DDR5 ECS cxl/memscrub: Register CXL device DDR5 ECS with scrub configure driver cxl: scrub: sysfs: Add Documentation for CXL memory device scrub control attributes .../testing/sysfs-class-cxl-scrub-configure | 135 +++ drivers/cxl/Kconfig | 23 + drivers/cxl/core/Makefile | 1 + drivers/cxl/core/mbox.c | 62 ++ drivers/cxl/core/memscrub.c | 993 ++++++++++++++++++ drivers/cxl/cxlmem.h | 120 +++ drivers/cxl/pci.c | 8 + drivers/memory/Kconfig | 1 + drivers/memory/Makefile | 1 + drivers/memory/scrub/Kconfig | 11 + drivers/memory/scrub/Makefile | 6 + drivers/memory/scrub/memory-scrub.c | 484 +++++++++ include/memory/memory-scrub.h | 90 ++ include/uapi/linux/cxl_mem.h | 3 + 14 files changed, 1938 insertions(+) create mode 100644 Documentation/ABI/testing/sysfs-class-cxl-scrub-configure create mode 100644 drivers/cxl/core/memscrub.c create mode 100644 drivers/memory/scrub/Kconfig create mode 100644 drivers/memory/scrub/Makefile create mode 100755 drivers/memory/scrub/memory-scrub.c create mode 100755 include/memory/memory-scrub.h -- 2.34.1
