Re: [PATCH 1/4] cxl/events: Update Common Event Record to CXL spec rev 3.2

[Jonathan Cameron <Jonathan.Cameron@huawei.com>]

On Wed, 16 Jul 2025 11:49:42 +0100
<shiju.jose@huawei.com> wrote:

> From: Shiju Jose <shiju.jose@huawei.com>
> 
> CXL spec 3.2 section 8.2.10.2.1 Table 8-55, Common Event Record format
> defined new fields LD-ID and Head ID.
> 
> LD-ID: ID of logical device from where the event originated, which is
> valid only if LD-ID valid flag is set to 1.
> CXL spec 3.2 Section 2.4 describes, a Type 3 Multi-Logical Device (MLD)
> can partition its resources into up to 16 isolated Logical Devices.
> Each Logical Device is identified by a Logical Device Identifier (LD-ID)
> in CXL.mem and CXL.io protocols. LD-ID is a 16-bit Logical Device
> identifier applicable for CXL.io and CXL.mem requests and responses.
> CXL.mem supports only the lower 4 bits of LD-ID and therefore can support
> up to 16 unique LD-ID values over the link. Requests and responses
> forwarded over an MLD Port are tagged with LD-ID.
> 
> Head ID: ID of the device head, from where the event originated, which is
> valid only if head valid flag is set to 1.
> 
> Add updates for the above spec changes in the CXL events record and CXL
> common trace event implementation.
> 
> Reviewed-by: Dave Jiang <dave.jiang@intel.com>
> Signed-off-by: Shiju Jose <shiju.jose@huawei.com>
Reviewed-by: Jonathan Cameron <jonathan.cameron@huawei.com>