Update EINJ documentation with build requirements for CXL error types and how to inject CXL error types. Signed-off-by: Ben Cheatham <Benjamin.Cheatham@xxxxxxx> --- Documentation/firmware-guide/acpi/apei/einj.rst | 12 ++++++++++++ 1 file changed, 12 insertions(+) diff --git a/Documentation/firmware-guide/acpi/apei/einj.rst b/Documentation/firmware-guide/acpi/apei/einj.rst index d6b61d22f525..83afe3bac793 100644 --- a/Documentation/firmware-guide/acpi/apei/einj.rst +++ b/Documentation/firmware-guide/acpi/apei/einj.rst @@ -181,6 +181,18 @@ You should see something like this in dmesg:: [22715.834759] EDAC sbridge MC3: PROCESSOR 0:306e7 TIME 1422553404 SOCKET 0 APIC 0 [22716.616173] EDAC MC3: 1 CE memory read error on CPU_SrcID#0_Channel#0_DIMM#0 (channel:0 slot:0 page:0x12345 offset:0x0 grain:32 syndrome:0x0 - area:DRAM err_code:0001:0090 socket:0 channel_mask:1 rank:0) +CXL error types are supported from ACPI 6.5 onwards. These error types +are not available in the legacy interface at /sys/kernel/debug/apei/einj, +but are instead at /sys/kernel/debug/cxl/portX/dportY. Inside the dportY +directory are two files, einj_types and einj_inject. These files work the +same as the available_error_type and error_inject files (read the error +types from einj_types and write the type to inject to einj_inject). + +To use these error types one of (or both) ``CONFIG_CXL_ACPI`` or +``CONFIG_CXL_PORT`` must be reachable by the EINJ module; if +``CONFIG_ACPI_APEI_EINJ`` == y/m, then at least one of ``CONFIG_CXL_ACPI`` +or ``CONFIG_CXL_PORT`` must also be set to y/m. + Special notes for injection into SGX enclaves: There may be a separate BIOS setup option to enable SGX injection. -- 2.34.1
