From: Bjorn Helgaas <helgaas@kernel.org>
To: "Verma, Vishal L" <vishal.l.verma@intel.com>
Cc: "rrichter@amd.com" <rrichter@amd.com>,
"terry.bowman@amd.com" <terry.bowman@amd.com>,
"Jiang, Dave" <dave.jiang@intel.com>,
"rafael@kernel.org" <rafael@kernel.org>,
"Schofield, Alison" <alison.schofield@intel.com>,
"linux-cxl@vger.kernel.org" <linux-cxl@vger.kernel.org>,
"lenb@kernel.org" <lenb@kernel.org>,
"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
"Williams, Dan J" <dan.j.williams@intel.com>,
"Weiny, Ira" <ira.weiny@intel.com>,
"bwidawsk@kernel.org" <bwidawsk@kernel.org>,
"Jonathan.Cameron@huawei.com" <Jonathan.Cameron@huawei.com>,
"bhelgaas@google.com" <bhelgaas@google.com>,
"dave@stgolabs.net" <dave@stgolabs.net>,
"linux-acpi@vger.kernel.org" <linux-acpi@vger.kernel.org>,
"linux-pci@vger.kernel.org" <linux-pci@vger.kernel.org>
Subject: Re: [PATCH v3 9/9] cxl/acpi: Set ACPI's CXL _OSC to indicate CXL1.1 support
Date: Thu, 10 Nov 2022 11:10:55 -0600 [thread overview]
Message-ID: <20221110171055.GA627971@bhelgaas> (raw)
In-Reply-To: <4d0da6a410ca49c1b70628a2a4814bdf2cbfce58.camel@intel.com>
On Thu, Nov 10, 2022 at 12:51:02AM +0000, Verma, Vishal L wrote:
> On Wed, 2022-11-09 at 17:35 -0600, Bjorn Helgaas wrote:
> > I don't know the history, but OSC_CXL_1_1_PORT_REG_ACCESS_SUPPORT and
> > OSC_CXL_2_0_PORT_DEV_REG_ACCESS_SUPPORT seem like sort of weird names
> > since they don't match the spec at all ("RCD and RCH Port Register
> > Access Supported" and "CXL VH Register Access Supported").
>
> Ah the RCH/RCD and VH terminology was only introduced in the CXL-3.0
> spec. When the above defines were added, the spec was at 2.0, and it
> used the descriptions: "CXL 1.1 Port Register Access supported", and
> "CXL 2.0 Port/Device Register Access supported" (Table 217 in 2.0).
Haha, that's annoying :) I didn't dig back through the old versions.
I guess CXL folks can decide whether to keep the old names or update.
next prev parent reply other threads:[~2022-11-10 17:11 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <20221109104059.766720-1-rrichter@amd.com>
2022-11-09 10:40 ` [PATCH v3 9/9] cxl/acpi: Set ACPI's CXL _OSC to indicate CXL1.1 support Robert Richter
2022-11-09 12:22 ` Rafael J. Wysocki
2022-11-09 23:35 ` Bjorn Helgaas
2022-11-10 0:51 ` Verma, Vishal L
2022-11-10 17:10 ` Bjorn Helgaas [this message]
2022-11-10 19:43 ` Terry Bowman
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