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Wed, 21 Jan 2026 16:35:20 +0000 Date: Wed, 21 Jan 2026 10:38:30 -0600 From: Ira Weiny To: Shubhakar Gowda , CC: , , , , , , , , Shubhakar Gowda Subject: Re: [PATCH] ACPI: NFIT:Advertise DSM function 0xA (Query ARS error inject capabilities) Message-ID: <69710106617df_1c608f10033@iweiny-mobl.notmuch> References: <20260119184438.19942-1-Shubhakar_gowda.P_s@dell.com> Content-Type: text/plain; charset="utf-8" Content-Disposition: inline Content-Transfer-Encoding: 8bit In-Reply-To: <20260119184438.19942-1-Shubhakar_gowda.P_s@dell.com> X-ClientProxiedBy: SJ0PR13CA0136.namprd13.prod.outlook.com (2603:10b6:a03:2c6::21) To DM3PPF99D0888FA.namprd11.prod.outlook.com (2603:10b6:f:fc00::f3d) Precedence: bulk X-Mailing-List: linux-acpi@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: DM3PPF99D0888FA:EE_|SA0PR11MB4671:EE_ X-MS-Office365-Filtering-Correlation-Id: fb0b65ae-b185-4551-da47-08de590b1141 X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0;ARA:13230040|1800799024|376014|366016; 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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 > --- > 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 >