Re: [RFC PATCH 5/9] cxl/mem: Find device capabilities

Jon Masters
2020-11-26T06:06:18Z

On 11/11/20 12:43 AM, Ben Widawsky wrote:

> + case CXL_CAPABILITIES_CAP_ID_SECONDARY_MAILBOX:
> + dev_dbg(&cxlm->pdev->dev,
> + "found UNSUPPORTED Secondary Mailbox capability\n");

Per spec, the secondary mailbox is intended for use by platform
firmware, so Linux should never be using it anyway. Maybe that message
is slightly misleading?

Jon.

P.S. Related - I've severe doubts about the mailbox approach being
proposed by CXL and have begun to push back through the spec org.

--
Computer Architect