linux-kernel - Re: [RFC PATCH 0/9] CXL 2.0 Support

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Message-ID: <1878cd93df75dc8c1b35eab7b7aaaed243f9129e.camel@intel.com>
Date:   Fri, 4 Dec 2020 19:26:01 +0000
From:   "Verma, Vishal L" <vishal.l.verma@...el.com>
To:     "Widawsky, Ben" <ben.widawsky@...el.com>,
        "cbrowy@...ry-design.com" <cbrowy@...ry-design.com>
CC:     "Kelley, Sean V" <sean.v.kelley@...el.com>,
        "Weiny, Ira" <ira.weiny@...el.com>,
        "linux-cxl@...r.kernel.org" <linux-cxl@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "Williams, Dan J" <dan.j.williams@...el.com>,
        "Wysocki, Rafael J" <rafael.j.wysocki@...el.com>,
        "linux-pci@...r.kernel.org" <linux-pci@...r.kernel.org>,
        "bhelgaas@...gle.com" <bhelgaas@...gle.com>,
        "linux-acpi@...r.kernel.org" <linux-acpi@...r.kernel.org>
Subject: Re: [RFC PATCH 0/9] CXL 2.0 Support

On Fri, 2020-12-04 at 10:12 -0800, Ben Widawsky wrote:
> Hi Chris.
> 
> On 20-12-04 12:40:03, Chris Browy wrote:
[..]
> 
> >    acpidump indicates the CXL0 and CXLM devices but no SRAT or HMAT tables are
> >    in the dump which is curious.
> 
> I don't typically use HMAT, but I do have an SRAT in mine, so that's strange.
> You should also have a CEDT.
> 
I suspect an SRAT is only added if you have distinct numa nodes. Adding
a few '-numa node' bits to the qemu command line should be enough to
make that happen.