Re: [PATCH v8 1/2] acpi/ghes, cxl/pci: Process CXL CPER Protocol Errors

[Alison Schofield]

On Mon, Mar 10, 2025 at 10:38:38PM +0000, Smita Koralahalli wrote:
> When PCIe AER is in FW-First, OS should process CXL Protocol errors from
> CPER records. Introduce support for handling and logging CXL Protocol
> errors.
> 
> The defined trace events cxl_aer_uncorrectable_error and
> cxl_aer_correctable_error trace native CXL AER endpoint errors. Reuse them
> to trace FW-First Protocol errors.
> 
> Since the CXL code is required to be called from process context and
> GHES is in interrupt context, use workqueues for processing.
> 
> Similar to CXL CPER event handling, use kfifo to handle errors as it
> simplifies queue processing by providing lock free fifo operations.
> 
> Add the ability for the CXL sub-system to register a workqueue to
> process CXL CPER protocol errors.
> 
> Signed-off-by: Smita Koralahalli <Smita.KoralahalliChannabasappa@xxxxxxx>

Reviewed-by: Alison Schofield <alison.schofield@xxxxxxxxx>

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