7 Nov
2020
7 Nov
'20
9:40 a.m.
On Fri, Nov 06, 2020 at 03:10:01PM +0100, Alexander A Sverdlin wrote:
From: Alexander Sverdlin alexander.sverdlin@nokia.com
Linux doesn't own the memory immediately after the kernel image. On Octeon bootloader places a shared structure right close after the kernel _end, refer to "struct cvmx_bootinfo *octeon_bootinfo" in cavium-octeon/setup.c.
If check_kernel_sections_mem() rounds the PFNs up, first memblock_alloc() inside early_init_dt_alloc_memory_arch() <= device_tree_init() returns memory block overlapping with the above octeon_bootinfo structure, which is being overwritten afterwards.
as this special for Octeon how about added the memblock_reserve in octen specific code ?
Thomas.
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