diff options
Diffstat (limited to 'Documentation')
| -rw-r--r-- | Documentation/ABI/testing/debugfs-cxl | 35 | ||||
| -rw-r--r-- | Documentation/ABI/testing/sysfs-bus-cxl | 14 |
2 files changed, 49 insertions, 0 deletions
diff --git a/Documentation/ABI/testing/debugfs-cxl b/Documentation/ABI/testing/debugfs-cxl new file mode 100644 index 000000000000..fe61d372e3fa --- /dev/null +++ b/Documentation/ABI/testing/debugfs-cxl @@ -0,0 +1,35 @@ +What: /sys/kernel/debug/cxl/memX/inject_poison +Date: April, 2023 +KernelVersion: v6.4 +Contact: linux-cxl@vger.kernel.org +Description: + (WO) When a Device Physical Address (DPA) is written to this + attribute, the memdev driver sends an inject poison command to + the device for the specified address. The DPA must be 64-byte + aligned and the length of the injected poison is 64-bytes. If + successful, the device returns poison when the address is + accessed through the CXL.mem bus. Injecting poison adds the + address to the device's Poison List and the error source is set + to Injected. In addition, the device adds a poison creation + 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. + + +What: /sys/kernel/debug/memX/clear_poison +Date: April, 2023 +KernelVersion: v6.4 +Contact: linux-cxl@vger.kernel.org +Description: + (WO) When a Device Physical Address (DPA) is written to this + attribute, the memdev driver sends a clear poison command to + the device for the specified address. Clearing poison removes + the address from the device's Poison List and writes 0 (zero) + for 64 bytes starting at address. It is not an error to clear + poison from an address that does not have poison set. If the + device cannot clear poison from the address, -ENXIO is returned. + The clear_poison attribute is only visible for devices + supporting the capability. diff --git a/Documentation/ABI/testing/sysfs-bus-cxl b/Documentation/ABI/testing/sysfs-bus-cxl index 3acf2f17a73f..48ac0d911801 100644 --- a/Documentation/ABI/testing/sysfs-bus-cxl +++ b/Documentation/ABI/testing/sysfs-bus-cxl @@ -415,3 +415,17 @@ Description: 1), and checks that the hardware accepts the commit request. Reading this value indicates whether the region is committed or not. + + +What: /sys/bus/cxl/devices/memX/trigger_poison_list +Date: April, 2023 +KernelVersion: v6.4 +Contact: linux-cxl@vger.kernel.org +Description: + (WO) When a boolean 'true' is written to this attribute the + memdev driver retrieves the poison list from the device. The + list consists of addresses that are poisoned, or would result + in poison if accessed, and the source of the poison. This + attribute is only visible for devices supporting the + capability. The retrieved errors are logged as kernel + events when cxl_poison event tracing is enabled. |