[PATCH 03/19] arc: define DPS root partition type UUID

[Vincent Mailhol]

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 ARC 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: Vineet Gupta <vgupta at kernel.org>
Cc: linux-snps-arc at lists.infradead.org
Signed-off-by: Vincent Mailhol <mailhol at kernel.org>
---
 arch/arc/Kconfig                | 1 +
 arch/arc/include/asm/dps_root.h | 8 ++++++++
 2 files changed, 9 insertions(+)

diff --git a/arch/arc/Kconfig b/arch/arc/Kconfig
index 2ed7186c81c5..cc3a57a0111f 100644
--- a/arch/arc/Kconfig
+++ b/arch/arc/Kconfig
@@ -10,6 +10,7 @@ config ARC
 	select ARCH_HAS_CACHE_LINE_SIZE
 	select ARCH_HAS_DEBUG_VM_PGTABLE
 	select ARCH_HAS_DMA_PREP_COHERENT
+	select ARCH_HAS_DPS_ROOT_PARTITION_TYPE_UUID
 	select ARCH_HAS_PTE_SPECIAL
 	select ARCH_HAS_SETUP_DMA_OPS
 	select ARCH_HAS_SYNC_DMA_FOR_CPU
diff --git a/arch/arc/include/asm/dps_root.h b/arch/arc/include/asm/dps_root.h
new file mode 100644
index 000000000000..c9db3ddf1a53
--- /dev/null
+++ b/arch/arc/include/asm/dps_root.h
@@ -0,0 +1,8 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+
+#ifndef _ASM_ARC_DPS_ROOT_H
+#define _ASM_ARC_DPS_ROOT_H
+
+#define DPS_ROOT_PARTITION_TYPE_UUID "d27f46ed-2919-4cb8-bd25-9531f3c16534"
+
+#endif /* _ASM_ARC_DPS_ROOT_H */

-- 
2.53.0