linux-kernel - Re: [PATCH] EDAC/{i10nm,skx,skx_common}: Support multiple clumps

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Message-ID: <20241210163734.GA3244835@bhelgaas>
Date: Tue, 10 Dec 2024 10:37:34 -0600
From: Bjorn Helgaas <helgaas@...nel.org>
To: "Luck, Tony" <tony.luck@...el.com>
Cc: "Meyer, Kyle" <kyle.meyer@....com>,
	"Zhuo, Qiuxu" <qiuxu.zhuo@...el.com>, "bp@...en8.de" <bp@...en8.de>,
	"james.morse@....com" <james.morse@....com>,
	"mchehab@...nel.org" <mchehab@...nel.org>,
	"rric@...nel.org" <rric@...nel.org>,
	"linux-edac@...r.kernel.org" <linux-edac@...r.kernel.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] EDAC/{i10nm,skx,skx_common}: Support multiple clumps

On Fri, Dec 06, 2024 at 10:09:23PM +0000, Luck, Tony wrote:
> What we need here is a function that maps from a PCIe device to a CPU socket.
> 
> Has this problem been encountered before? Is there an existing solution?

There's nothing in PCI itself that connects a device to a CPU.  It
sounds like something that might fit with an ACPI NUMA description,
e.g., if a CPU and a PCI host bridge had the same ACPI _PXM value, you
could conclude that the devices below the host bridge are close to the
CPU.

Bjorn