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[Qemu-devel] [PATCH 02/99] device_tree: Increase FDT_MAX_SIZE to 1 MiB

From: Michael Roth
Subject: [Qemu-devel] [PATCH 02/99] device_tree: Increase FDT_MAX_SIZE to 1 MiB
Date: Mon, 23 Jul 2018 15:16:11 -0500

From: Geert Uytterhoeven <address@hidden>

It is not uncommon for a contemporary FDT to be larger than 64 KiB,
leading to failures loading the device tree from sysfs:

    qemu-system-aarch64: qemu_fdt_setprop: Couldn't set ...: FDT_ERR_NOSPACE

Hence increase the limit to 1 MiB, like on PPC.

For reference, the largest arm64 DTB created from the Linux sources is
ca. 75 KiB large (100 KiB when built with symbols/fixup support).

Cc: address@hidden
Signed-off-by: Geert Uytterhoeven <address@hidden>
Message-id: address@hidden
Reviewed-by: Peter Maydell <address@hidden>
Signed-off-by: Peter Maydell <address@hidden>
(cherry picked from commit 14ec3cbd7c1e31dca4d23f028100c8f43e156573)
Signed-off-by: Michael Roth <address@hidden>
 device_tree.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/device_tree.c b/device_tree.c
index 19458b32bf..52c3358a55 100644
--- a/device_tree.c
+++ b/device_tree.c
@@ -29,7 +29,7 @@
 #include <libfdt.h>
-#define FDT_MAX_SIZE  0x10000
+#define FDT_MAX_SIZE  0x100000
 void *create_device_tree(int *sizep)

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