linux-kernel - Re: [PATCH] ACPI: NFIT:Advertise DSM function 0xA (Query ARS error inject capabilities)

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Message-ID: <697415ec95e13_3095100cb@dwillia2-mobl4.notmuch>
Date: Fri, 23 Jan 2026 16:44:28 -0800
From: <dan.j.williams@...el.com>
To: Shubhakar Gowda <shubakargowdaps@...il.com>, <dan.j.williams@...el.com>
CC: <vishal.l.verma@...el.com>, <dave.jiang@...el.com>, <ira.weiny@...el.com>,
	<rafael@...nel.org>, <lenb@...nel.org>, <nvdimm@...ts.linux.dev>,
	<linux-acpi@...r.kernel.org>, <linux-kernel@...r.kernel.org>, Shubhakar Gowda
	<Shubhakar_gowda.P_s@...l.com>
Subject: Re: [PATCH] ACPI: NFIT:Advertise DSM function 0xA (Query ARS error
 inject capabilities)

Shubhakar Gowda wrote:
> ACPI 6.6 defines DSM function index 0xA to Query Address Range Scrub
> (ARS) error injection capabilities. This patch adds support for this
> DSM function in the NFIT DSM mask so that userspace and ndctl tool can
> detect platform support for Query ARS error injection capabilities features.
> 
> The patch updates NFIT initialization to include DSM 0xA, logs
> supported DSMs for debugging, and uses the existing DSM infrastructure.
> No kernel ABI changes are introduced.

It does introduce new ABI. This new command can now be passed from
userspace. Can you say a bit more about why this is needed and the plans
for userspace to consume this? Like proposed changes to the "ndctl
inject-error" command, and otherwise what problems occur today with the
kernel blocking this command code?