linux-kernel - [PATCH] acpi: add support for the NBFT

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Date:   Thu,  8 Dec 2022 17:25:36 -0600
From:   Stuart Hayes <stuart.w.hayes@...il.com>
To:     "Rafael J . Wysocki" <rafael@...nel.org>,
        Len Brown <lenb@...nel.org>
Cc:     linux-kernel@...r.kernel.org, linux-acpi@...r.kernel.org,
        John Meneghini <jmeneghi@...hat.com>,
        Charles Rose <charles_rose@...l.com>,
        Stuart Hayes <stuart.w.hayes@...il.com>,
        Doug Farley <Douglas_Farley@...l.com>,
        Lenny Szubowicz <lszubowi@...hat.com>
Subject: [PATCH] acpi: add support for the NBFT

Add support for the NVMe Boot Firmware Table (NBFT) to facilitate
booting from NVM Express namespaces which are accessed via
NVMe over Fabrics (NVMe-oF).

Signed-off-by: Stuart Hayes <stuart.w.hayes@...il.com>
Signed-off-by: Doug Farley <Douglas_Farley@...l.com>
Signed-off-by: Lenny Szubowicz <lszubowi@...hat.com>
---
 drivers/acpi/tables.c | 3 ++-
 include/acpi/actbl1.h | 2 ++
 2 files changed, 4 insertions(+), 1 deletion(-)

diff --git a/drivers/acpi/tables.c b/drivers/acpi/tables.c
index 47ec11d4c68e..f390c5883b56 100644
--- a/drivers/acpi/tables.c
+++ b/drivers/acpi/tables.c
@@ -545,7 +545,8 @@ static const char table_sigs[][ACPI_NAMESEG_SIZE] __initconst = {
 	ACPI_SIG_WDDT, ACPI_SIG_WDRT, ACPI_SIG_DSDT, ACPI_SIG_FADT,
 	ACPI_SIG_PSDT, ACPI_SIG_RSDT, ACPI_SIG_XSDT, ACPI_SIG_SSDT,
 	ACPI_SIG_IORT, ACPI_SIG_NFIT, ACPI_SIG_HMAT, ACPI_SIG_PPTT,
-	ACPI_SIG_NHLT, ACPI_SIG_AEST, ACPI_SIG_CEDT, ACPI_SIG_AGDI };
+	ACPI_SIG_NHLT, ACPI_SIG_AEST, ACPI_SIG_CEDT, ACPI_SIG_AGDI,
+	ACPI_SIG_NBFT };
 
 #define ACPI_HEADER_SIZE sizeof(struct acpi_table_header)
 
diff --git a/include/acpi/actbl1.h b/include/acpi/actbl1.h
index 15c78678c5d3..6ec43410288a 100644
--- a/include/acpi/actbl1.h
+++ b/include/acpi/actbl1.h
@@ -49,6 +49,8 @@
 #define ACPI_SIG_S3PT           "S3PT"	/* S3 Performance (sub)Table */
 #define ACPI_SIG_PCCS           "PCC"	/* PCC Shared Memory Region */
 
+#define ACPI_SIG_NBFT		"NBFT"	/* NVMe Boot Firmware Table */
+
 /* Reserved table signatures */
 
 #define ACPI_SIG_MATR           "MATR"	/* Memory Address Translation Table */
-- 
2.31.1