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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(). Cc: stable@vger.kernel.org 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> |
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| .. | ||
| asm-offsets.c | ||
| cpuinfo.c | ||
| early_printk.c | ||
| entry.S | ||
| head.S | ||
| insnemu.S | ||
| irq.c | ||
| kgdb.c | ||
| Makefile | ||
| misaligned.c | ||
| module.c | ||
| nios2_ksyms.c | ||
| process.c | ||
| prom.c | ||
| ptrace.c | ||
| setup.c | ||
| signal.c | ||
| sys_nios2.c | ||
| syscall_table.c | ||
| time.c | ||
| traps.c | ||
| vmlinux.lds.S | ||