diff options
| author | Shiju Jose <shiju.jose@huawei.com> | 2025-05-21 13:47:44 +0100 |
|---|---|---|
| committer | Dave Jiang <dave.jiang@intel.com> | 2025-05-23 13:24:38 -0700 |
| commit | 0b5ccb0de1e2cf83f18f012f0e6ba4365be9dd4b (patch) | |
| tree | 21517dff7d6580ada3eaa4f8f9fb36df7e251f2d /drivers/cxl/Kconfig | |
| parent | 077ee5f7ddcfd482ecac504b3f711aa5e4c049fe (diff) | |
cxl/edac: Support for finding memory operation attributes from the current boot
Certain operations on memory, such as memory repair, are permitted
only when the address and other attributes for the operation are
from the current boot. This is determined by checking whether the
memory attributes for the operation match those in the CXL gen_media
or CXL DRAM memory event records reported during the current boot.
The CXL event records must be backed up because they are cleared
in the hardware after being processed by the kernel.
Support is added for storing CXL gen_media or CXL DRAM memory event
records in xarrays. Old records are deleted when they expire or when
there is an overflow and which depends on platform correctly report
Event Record Timestamp field of CXL spec Table 8-55 Common Event
Record Format.
Additionally, helper functions are implemented to find a matching
record in the xarray storage based on the memory attributes and
repair type.
Add validity check, when matching attributes for sparing, using
the validity flag in the DRAM event record, to ensure that all
required attributes for a requested repair operation are valid and
set.
Reviewed-by: Dave Jiang <dave.jiang@intel.com>
Co-developed-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Signed-off-by: Shiju Jose <shiju.jose@huawei.com>
Reviewed-by: Alison Schofield <alison.schofield@intel.com>
Acked-by: Dan Williams <dan.j.williams@intel.com>
Link: https://patch.msgid.link/20250521124749.817-7-shiju.jose@huawei.com
Signed-off-by: Dave Jiang <dave.jiang@intel.com>
Diffstat (limited to 'drivers/cxl/Kconfig')
| -rw-r--r-- | drivers/cxl/Kconfig | 21 |
1 files changed, 21 insertions, 0 deletions
diff --git a/drivers/cxl/Kconfig b/drivers/cxl/Kconfig index 51987f2a2548..48b7314afdb8 100644 --- a/drivers/cxl/Kconfig +++ b/drivers/cxl/Kconfig @@ -164,6 +164,27 @@ config CXL_EDAC_ECS of a memory ECS feature established by the platform/device. Otherwise say 'n'. +config CXL_EDAC_MEM_REPAIR + bool "Enable CXL Memory Repair" + depends on CXL_EDAC_MEM_FEATURES + depends on EDAC_MEM_REPAIR + help + The CXL EDAC memory repair control is optional and allows host + to control the memory repair features (e.g. sparing, PPR) + configurations of CXL memory expander devices. + + When enabled, the memory repair feature requires an additional + memory of approximately 43KB to store CXL DRAM and CXL general + media event records. + + When enabled 'cxl_mem' EDAC devices are published with memory + repair control attributes as described by + Documentation/ABI/testing/sysfs-edac-memory-repair. + + Say 'y' if you have an expert need to change default settings + of a memory repair feature established by the platform/device. + Otherwise say 'n'. + config CXL_PORT default CXL_BUS tristate |