Tobias Klauser c1dcea1236 nios2: reserve boot memory for device tree ... commit 921d701e6f upstream. Make sure to reserve the boot memory for the flattened device tree. Otherwise it might get overwritten, e.g. when initial_boot_params is copied, leading to a corrupted FDT and a boot hang/crash: bootconsole [early0] enabled Early console on uart16650 initialized at 0xf8001600 OF: fdt: Error -11 processing FDT Kernel panic - not syncing: setup_cpuinfo: No CPU found in devicetree! ---[ end Kernel panic - not syncing: setup_cpuinfo: No CPU found in devicetree! Guenter Roeck says: > I think I found the problem. In unflatten_and_copy_device_tree(), with added > debug information: > > OF: fdt: initial_boot_params=c861e400, dt=c861f000 size=28874 (0x70ca) > > ... and then initial_boot_params is copied to dt, which results in corrupted > fdt since the memory overlaps. Looks like the initial_boot_params memory > is not reserved and (re-)allocated by early_init_dt_alloc_memory_arch(). Reported-by: Guenter Roeck <linux@roeck-us.net> Reference: http://lkml.kernel.org/r/20170226210338.GA19476@roeck-us.net Tested-by: Guenter Roeck <linux@roeck-us.net> Signed-off-by: Tobias Klauser <tklauser@distanz.ch> Acked-by: Ley Foon Tan <ley.foon.tan@intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>		2017-04-12 12:41:14 +02:00
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boot	nios2: dts: 10m50: Add tx-threshold parameter	2016-09-27 12:55:50 +02:00
configs	nios2: add Max10 defconfig	2015-09-08 18:16:02 +08:00
include	nios2: use of_property_read_bool	2016-10-06 18:19:16 +08:00
kernel	nios2: reserve boot memory for device tree	2017-04-12 12:41:14 +02:00
lib	nios2: memset: use the right constraint modifier for the %4 output operand	2016-04-27 16:35:55 +08:00
mm	dma-mapping: use unsigned long for dma_attrs	2016-08-04 08:50:07 -04:00
platform	nios2: Remove unnecessary of_platform_populate with default match table	2016-06-23 15:00:31 -05:00
Kconfig	lib/GCD.c: use binary GCD algorithm instead of Euclidean	2016-05-20 17:58:30 -07:00
Kconfig.debug	nios2: add early printk support	2015-02-10 23:21:08 +08:00
Makefile	nios2: Add order-only DTC dependency to %.dtb target	2016-05-19 09:15:00 +08:00