36 lines
1.6 KiB
Plaintext
36 lines
1.6 KiB
Plaintext
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What: /sys/kernel/debug/cxl/memX/inject_poison
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Date: April, 2023
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KernelVersion: v6.4
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Contact: linux-cxl@vger.kernel.org
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Description:
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(WO) When a Device Physical Address (DPA) is written to this
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attribute, the memdev driver sends an inject poison command to
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the device for the specified address. The DPA must be 64-byte
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aligned and the length of the injected poison is 64-bytes. If
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successful, the device returns poison when the address is
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accessed through the CXL.mem bus. Injecting poison adds the
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address to the device's Poison List and the error source is set
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to Injected. In addition, the device adds a poison creation
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event to its internal Informational Event log, updates the
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Event Status register, and if configured, interrupts the host.
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It is not an error to inject poison into an address that
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already has poison present and no error is returned. The
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inject_poison attribute is only visible for devices supporting
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the capability.
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What: /sys/kernel/debug/memX/clear_poison
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Date: April, 2023
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KernelVersion: v6.4
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Contact: linux-cxl@vger.kernel.org
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Description:
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(WO) When a Device Physical Address (DPA) is written to this
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attribute, the memdev driver sends a clear poison command to
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the device for the specified address. Clearing poison removes
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the address from the device's Poison List and writes 0 (zero)
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for 64 bytes starting at address. It is not an error to clear
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poison from an address that does not have poison set. If the
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device cannot clear poison from the address, -ENXIO is returned.
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The clear_poison attribute is only visible for devices
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supporting the capability.
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