[PATCH 07/19] mips: define DPS root partition type UUIDs

[Vincent Mailhol <mailhol@kernel.org>]

DPS [1] assigns GPT partition type UUIDs to operating system partitions.
Root partitions use architecture-specific type UUIDs so the OS can
discover the intended root filesystem without relying on a root= cmdline
option.

Define DPS_ROOT_PARTITION_TYPE_UUID in asm/dps_root.h for the MIPS
endian and 32/64-bit variants described by the specification and select
ARCH_HAS_DPS_ROOT_PARTITION_TYPE_UUID.

[1] The Discoverable Partitions Specification (DPS)
Link: https://uapi-group.org/specifications/specs/discoverable_partitions_specification/

Cc: Thomas Bogendoerfer <tsbogend@alpha.franken.de>
Cc: linux-mips@vger.kernel.org
Signed-off-by: Vincent Mailhol <mailhol@kernel.org>
---
 arch/mips/Kconfig                |  1 +
 arch/mips/include/asm/dps_root.h | 20 ++++++++++++++++++++
 2 files changed, 21 insertions(+)

diff --git a/arch/mips/Kconfig b/arch/mips/Kconfig
index 4364f3dba688..15dd7d336cfa 100644
--- a/arch/mips/Kconfig
+++ b/arch/mips/Kconfig
@@ -10,6 +10,7 @@ config MIPS
 	select ARCH_HAS_CURRENT_STACK_POINTER
 	select ARCH_HAS_DEBUG_VIRTUAL if !64BIT
 	select ARCH_HAS_DMA_OPS if MACH_JAZZ
+	select ARCH_HAS_DPS_ROOT_PARTITION_TYPE_UUID
 	select ARCH_HAS_FORTIFY_SOURCE
 	select ARCH_HAS_KCOV
 	select ARCH_HAS_NON_OVERLAPPING_ADDRESS_SPACE if !EVA
diff --git a/arch/mips/include/asm/dps_root.h b/arch/mips/include/asm/dps_root.h
new file mode 100644
index 000000000000..b07cab7399ad
--- /dev/null
+++ b/arch/mips/include/asm/dps_root.h
@@ -0,0 +1,20 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+
+#ifndef _ASM_MIPS_DPS_ROOT_H
+#define _ASM_MIPS_DPS_ROOT_H
+
+#ifdef CONFIG_CPU_LITTLE_ENDIAN
+#ifdef CONFIG_64BIT
+#define DPS_ROOT_PARTITION_TYPE_UUID "700bda43-7a34-4507-b179-eeb93d7a7ca3"
+#else
+#define DPS_ROOT_PARTITION_TYPE_UUID "37c58c8a-d913-4156-a25f-48b1b64e07f0"
+#endif
+#else
+#ifdef CONFIG_64BIT
+#define DPS_ROOT_PARTITION_TYPE_UUID "d113af76-80ef-41b4-bdb6-0cff4d3d4a25"
+#else
+#define DPS_ROOT_PARTITION_TYPE_UUID "e9434544-6e2c-47cc-bae2-12d6deafb44c"
+#endif
+#endif
+
+#endif /* _ASM_MIPS_DPS_ROOT_H */

-- 
2.53.0