diff options
| author | Ben Cheatham <Benjamin.Cheatham@amd.com> | 2024-03-11 09:25:07 -0500 |
|---|---|---|
| committer | Dan Williams <dan.j.williams@intel.com> | 2024-03-12 23:08:30 -0700 |
| commit | 8039804cfa7314ad50085a779923aa5469889f88 (patch) | |
| tree | c622f326542eaeb42b7a28b0435dc9eddaf16554 /Documentation | |
| parent | 12fb28ea6b1cf24bde27c406eb38ee3c108d73f9 (diff) | |
| download | linux-8039804cfa7314ad50085a779923aa5469889f88.tar.gz | |
cxl/core: Add CXL EINJ debugfs files
Export CXL helper functions in einj-cxl.c for getting/injecting
available CXL protocol error types to sysfs under kernel/debug/cxl.
The kernel/debug/cxl/einj_types file will print the available CXL
protocol errors in the same format as the available_error_types
file provided by the einj module. The
kernel/debug/cxl/$dport_dev/einj_inject file is functionally the same
as the error_type and error_inject files provided by the EINJ module,
i.e.: writing an error type into $dport_dev/einj_inject will inject
said error type into the CXL dport represented by $dport_dev.
Reviewed-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Signed-off-by: Ben Cheatham <Benjamin.Cheatham@amd.com>
Link: https://lore.kernel.org/r/20240311142508.31717-4-Benjamin.Cheatham@amd.com
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
Diffstat (limited to 'Documentation')
| -rw-r--r-- | Documentation/ABI/testing/debugfs-cxl | 30 |
1 files changed, 30 insertions, 0 deletions
diff --git a/Documentation/ABI/testing/debugfs-cxl b/Documentation/ABI/testing/debugfs-cxl index fe61d372e3fac9..4c0f62f881ca4b 100644 --- a/Documentation/ABI/testing/debugfs-cxl +++ b/Documentation/ABI/testing/debugfs-cxl @@ -33,3 +33,33 @@ Description: device cannot clear poison from the address, -ENXIO is returned. The clear_poison attribute is only visible for devices supporting the capability. + +What: /sys/kernel/debug/cxl/einj_types +Date: January, 2024 +KernelVersion: v6.9 +Contact: linux-cxl@vger.kernel.org +Description: + (RO) Prints the CXL protocol error types made available by + the platform in the format "0x<error number> <error type>". + The possible error types are (as of ACPI v6.5): + 0x1000 CXL.cache Protocol Correctable + 0x2000 CXL.cache Protocol Uncorrectable non-fatal + 0x4000 CXL.cache Protocol Uncorrectable fatal + 0x8000 CXL.mem Protocol Correctable + 0x10000 CXL.mem Protocol Uncorrectable non-fatal + 0x20000 CXL.mem Protocol Uncorrectable fatal + + The <error number> can be written to einj_inject to inject + <error type> into a chosen dport. + +What: /sys/kernel/debug/cxl/$dport_dev/einj_inject +Date: January, 2024 +KernelVersion: v6.9 +Contact: linux-cxl@vger.kernel.org +Description: + (WO) Writing an integer to this file injects the corresponding + CXL protocol error into $dport_dev ($dport_dev will be a device + name from /sys/bus/pci/devices). The integer to type mapping for + injection can be found by reading from einj_types. If the dport + was enumerated in RCH mode, a CXL 1.1 error is injected, otherwise + a CXL 2.0 error is injected. |