linux-kernel - RE: [PATCH V13 9/9] cxl/port: Parse out DSMAS data from CDAT table

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Message-ID: <62d045039d44b_16fb9729443@dwillia2-xfh.jf.intel.com.notmuch>
Date:   Thu, 14 Jul 2022 09:32:03 -0700
From:   Dan Williams <dan.j.williams@...el.com>
To:     <ira.weiny@...el.com>, Dan Williams <dan.j.williams@...el.com>,
        "Bjorn Helgaas" <bhelgaas@...gle.com>,
        Jonathan Cameron <Jonathan.Cameron@...wei.com>
CC:     Ira Weiny <ira.weiny@...el.com>, Lukas Wunner <lukas@...ner.de>,
        "Alison Schofield" <alison.schofield@...el.com>,
        Vishal Verma <vishal.l.verma@...el.com>,
        Dave Jiang <dave.jiang@...el.com>,
        Ben Widawsky <bwidawsk@...nel.org>,
        <linux-kernel@...r.kernel.org>, <linux-cxl@...r.kernel.org>,
        <linux-pci@...r.kernel.org>
Subject: RE: [PATCH V13 9/9] cxl/port: Parse out DSMAS data from CDAT table

ira.weiny@ wrote:
> From: Ira Weiny <ira.weiny@...el.com>
> 
> CXL Ports with memory devices attached need the information from the
> Device Scoped Memory Affinity Structure (DSMAS).  This information is
> contained within the CDAT table buffer which is cached in the port
> device.
> 
> If CDAT data is available, parse and cache DSMAS data from the table.
> Store this data in unmarshaled struct dsmas data structures for ease of
> use later.  Ensure DSMAS headers are not malicious or ill formed so as
> to cause buffer overflow errors.
> 

Per patch 6 the parsing needs to move to a refactored version of the
ACPI table parsing, but for now it can just be dropped.