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CXL spec 3.1 section 8.2.9.9.11.2 describes the DDR5 Error Check Scrub (ECS) control feature. The Error Check Scrub (ECS) is a feature defined in JEDEC DDR5 SDRAM Specification (JESD79-5) and allows the DRAM to internally read, correct single-bit errors, and write back corrected data bits to the DRAM array while providing transparency to error counts. The ECS control feature allows the request to configure ECS input configurations during system boot or at run-time. The ECS control allows the requester to change the log entry type, the ECS threshold count provided that the request is within the definition specified in DDR5 mode registers, change mode between codeword mode and row count mode, and reset the ECS counter. Reviewed-by: Davidlohr Bueso <dave@stgolabs.net> Reviewed-by: Fan Ni <fan.ni@samsung.com> Signed-off-by: Shiju Jose <shiju.jose@huawei.com> Link: https://lore.kernel.org/r/20240223085902.1549-4-shiju.jose@huawei.com Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com> Message-Id: <20240705123039.963781-5-Jonathan.Cameron@huawei.com> Reviewed-by: Michael S. Tsirkin <mst@redhat.com> Signed-off-by: Michael S. Tsirkin <mst@redhat.com> |
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