Re: [RFC PATCH 5/9] cxl/mem: Find device capabilities
From: Jon Masters
Date: Thu Nov 26 2020 - 01:12:25 EST
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