linux-kernel - Re: [PATCH v2] ACPI: NUMA: debug invalid unused PXM value for CFMWs

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Message-ID: <Z9LzjQCKFfsdE2yJ@gourry-fedora-PF4VCD3F>
Date: Thu, 13 Mar 2025 11:02:37 -0400
From: Gregory Price <gourry@...rry.net>
To: Yuquan Wang <wangyuquan1236@...tium.com.cn>
Cc: rafael@...nel.org, lenb@...nel.org, dave@...olabs.net,
	jonathan.cameron@...wei.com, dave.jiang@...el.com,
	alison.schofield@...el.com, vishal.l.verma@...el.com,
	ira.weiny@...el.com, dan.j.williams@...el.com, rrichter@....com,
	bfaccini@...dia.com, rppt@...nel.org, haibo1.xu@...el.com,
	chenbaozi@...tium.com.cn, linux-acpi@...r.kernel.org,
	linux-kernel@...r.kernel.org, linux-cxl@...r.kernel.org
Subject: Re: [PATCH v2] ACPI: NUMA: debug invalid unused PXM value for CFMWs

On Thu, Mar 13, 2025 at 02:09:07PM +0800, Yuquan Wang wrote:
> @@ -441,6 +441,11 @@ static int __init acpi_parse_cfmws(union acpi_subtable_headers *header,
>  	start = cfmws->base_hpa;
>  	end = cfmws->base_hpa + cfmws->window_size;
>  
> +	if (srat_disabled()) {
> +		pr_err("SRAT is missing or bad while processing CFMWS.\n");
> +		return -EINVAL;
> +	}
> +

I thought the srat was optional regardless of the presence of a CFMWS.
Is this not the case?

~Gregory