linux-kernel - [PATCH 2/2] microblaze: Add support for reserved memory defined by DT

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Message-Id: <da4395776bf0de7207767abcc8a5df05bf411816.1645795048.git.michal.simek@xilinx.com>
Date:   Fri, 25 Feb 2022 14:17:31 +0100
From:   Michal Simek <michal.simek@...inx.com>
To:     linux-kernel@...r.kernel.org, monstr@...str.eu,
        michal.simek@...inx.com, git@...inx.com
Cc:     Andrew Morton <akpm@...ux-foundation.org>,
        David Hildenbrand <david@...hat.com>,
        Kefeng Wang <wangkefeng.wang@...wei.com>,
        Mike Rapoport <rppt@...nel.org>,
        Oscar Salvador <osalvador@...e.de>
Subject: [PATCH 2/2] microblaze: Add support for reserved memory defined by DT

In DT reserved memory nodes can be added as is described by
Documentation/devicetree/bindings/reserved-memory/reserved-memory.txt
but Microblaze didn't have a support for it. The similar change was done
for ARC by commit 1b10cb21d888 ("ARC: add support for reserved memory
defined by device tree"). It is pretty much enough to call
early_init_fdt_scan_reserved_mem().
Microblaze is not using initial_boot_params that's why there is no need to
call early_init_fdt_reserve_self().

Signed-off-by: Michal Simek <michal.simek@...inx.com>
---

 arch/microblaze/mm/init.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/arch/microblaze/mm/init.c b/arch/microblaze/mm/init.c
index de0d8b03af21..f4e503461d24 100644
--- a/arch/microblaze/mm/init.c
+++ b/arch/microblaze/mm/init.c
@@ -13,6 +13,7 @@
 #include <linux/kernel.h>
 #include <linux/mm.h> /* mem_init */
 #include <linux/initrd.h>
+#include <linux/of_fdt.h>
 #include <linux/pagemap.h>
 #include <linux/pfn.h>
 #include <linux/slab.h>
@@ -261,6 +262,8 @@ asmlinkage void __init mmu_init(void)
 
 	parse_early_param();
 
+	early_init_fdt_scan_reserved_mem();
+
 	/* CMA initialization */
 	dma_contiguous_reserve(memory_start + lowmem_size - 1);
 
-- 
2.35.1