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

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Message-ID: <69710106617df_1c608f10033@iweiny-mobl.notmuch>
Date: Wed, 21 Jan 2026 10:38:30 -0600
From: Ira Weiny <ira.weiny@...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.

Is this a duplicate of...

http://lore.kernel.org/20260119181824.15408-1-Shubhakar_gowda.P_s@dell.com

?

If so why?

Ira

> 
> Signed-off-by: Shubhakar Gowda <Shubhakar_gowda.P_s@...l.com>
> ---
>  drivers/acpi/nfit/core.c | 7 ++++++-
>  1 file changed, 6 insertions(+), 1 deletion(-)
> 
> diff --git a/drivers/acpi/nfit/core.c b/drivers/acpi/nfit/core.c
> index 5a1ced5..6cc863e 100644
> --- a/drivers/acpi/nfit/core.c
> +++ b/drivers/acpi/nfit/core.c
> @@ -2113,6 +2113,8 @@ enum nfit_aux_cmds {
>  	NFIT_CMD_ARS_INJECT_SET = 7,
>  	NFIT_CMD_ARS_INJECT_CLEAR = 8,
>  	NFIT_CMD_ARS_INJECT_GET = 9,
> +	/* ACPI 6.6: DSM function 0xA — Query ARS Error Inject Capabilities */
> +	NFIT_CMD_ARS_QUERY_CAP = 10,
>  };
>  
>  static void acpi_nfit_init_dsms(struct acpi_nfit_desc *acpi_desc)
> @@ -2152,10 +2154,13 @@ static void acpi_nfit_init_dsms(struct acpi_nfit_desc *acpi_desc)
>  		(1 << NFIT_CMD_TRANSLATE_SPA) |
>  		(1 << NFIT_CMD_ARS_INJECT_SET) |
>  		(1 << NFIT_CMD_ARS_INJECT_CLEAR) |
> -		(1 << NFIT_CMD_ARS_INJECT_GET);
> +		(1 << NFIT_CMD_ARS_INJECT_GET)	|
> +		(1 << NFIT_CMD_ARS_QUERY_CAP);
>  	for_each_set_bit(i, &dsm_mask, BITS_PER_LONG)
>  		if (acpi_check_dsm(adev->handle, guid, 1, 1ULL << i))
>  			set_bit(i, &acpi_desc->bus_dsm_mask);
> +	dev_dbg(acpi_desc->dev, "NFIT DSM mask detected: %#lx\n",
> +	acpi_desc->bus_dsm_mask);
>  
>  	/* Enumerate allowed NVDIMM_BUS_FAMILY_INTEL commands */
>  	dsm_mask = NVDIMM_BUS_INTEL_FW_ACTIVATE_CMDMASK;
> -- 
> 2.43.0
>