diff options
Diffstat (limited to 'Documentation/ABI/testing/debugfs-cxl')
| -rw-r--r-- | Documentation/ABI/testing/debugfs-cxl | 41 |
1 files changed, 38 insertions, 3 deletions
diff --git a/Documentation/ABI/testing/debugfs-cxl b/Documentation/ABI/testing/debugfs-cxl index fe61d372e3fa..12488c14be64 100644 --- a/Documentation/ABI/testing/debugfs-cxl +++ b/Documentation/ABI/testing/debugfs-cxl @@ -14,9 +14,10 @@ Description: event to its internal Informational Event log, updates the Event Status register, and if configured, interrupts the host. It is not an error to inject poison into an address that - already has poison present and no error is returned. The - inject_poison attribute is only visible for devices supporting - the capability. + already has poison present and no error is returned. If the + device returns 'Inject Poison Limit Reached' an -EBUSY error + is returned to the user. The inject_poison attribute is only + visible for devices supporting the capability. What: /sys/kernel/debug/memX/clear_poison @@ -33,3 +34,37 @@ 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. |