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authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-11 08:27:49 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-11 08:27:49 +0000
commitace9429bb58fd418f0c81d4c2835699bddf6bde6 (patch)
treeb2d64bc10158fdd5497876388cd68142ca374ed3 /Documentation/ABI/testing/debugfs-cxl
parentInitial commit. (diff)
downloadlinux-ace9429bb58fd418f0c81d4c2835699bddf6bde6.tar.xz
linux-ace9429bb58fd418f0c81d4c2835699bddf6bde6.zip
Adding upstream version 6.6.15.upstream/6.6.15
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
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+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.