Re: [PATCH V5 1/4] ACPI: Support Generic Initiator only domains

From: Dan Williams <dan.j.williams@intel.com>
To: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Cc: "Linux MM" <linux-mm@kvack.org>,
	"Linux ACPI" <linux-acpi@vger.kernel.org>,
	"Linux Kernel Mailing List" <linux-kernel@vger.kernel.org>,
	"Linux ARM" <linux-arm-kernel@lists.infradead.org>,
	"X86 ML" <x86@kernel.org>, "Keith Busch" <keith.busch@intel.com>,
	"Jérôme Glisse" <jglisse@redhat.com>,
	"Rafael J . Wysocki" <rjw@rjwysocki.net>,
	Linuxarm <linuxarm@huawei.com>,
	"Andrew Morton" <akpm@linux-foundation.org>,
	"Tao Xu" <tao3.xu@intel.com>
Subject: Re: [PATCH V5 1/4] ACPI: Support Generic Initiator only domains
Date: Tue, 12 Nov 2019 09:55:17 -0800	[thread overview]
Message-ID: <CAPcyv4jZG-5s6NsS-_-oNG45y0Qb1mVD_s8cCGqLYtzvHqEo+Q@mail.gmail.com> (raw)
In-Reply-To: <20191004114330.104746-2-Jonathan.Cameron@huawei.com>

[ add Tao Xu ]

On Fri, Oct 4, 2019 at 4:45 AM Jonathan Cameron
<Jonathan.Cameron@huawei.com> wrote:
>
> Generic Initiators are a new ACPI concept that allows for the
> description of proximity domains that contain a device which
> performs memory access (such as a network card) but neither
> host CPU nor Memory.
>
> This patch has the parsing code and provides the infrastructure
> for an architecture to associate these new domains with their
> nearest memory processing node.

Thanks for this Jonathan. May I ask how this was tested? Tao has been
working on qemu support for HMAT [1]. I have not checked if it already
supports generic initiator entries, but it would be helpful to include
an example of how the kernel sees these configurations in practice.

[1]: http://patchwork.ozlabs.org/cover/1096737/