Re: powerpc/prom: move the device tree if not in declared memory.
On Mon, 2018-12-17 at 14:18:27 UTC, Christophe Leroy wrote: > If the device tree doesn't reside in the memory which is declared > inside it, it has to be moved as well as this memory will not be > mapped by the kernel. > > Signed-off-by: Christophe Leroy Applied to powerpc next, thanks. https://git.kernel.org/powerpc/c/f242e0ac95cadb27527d0b06c95772 cheers
Re: [PATCH] powerpc/prom: move the device tree if not in declared memory.
Christophe Leroy writes: > If the device tree doesn't reside in the memory which is declared > inside it, it has to be moved as well as this memory will not be > mapped by the kernel. I worry this will break some obscure platform, but I'll merge it anyway and we'll see :) cheers > diff --git a/arch/powerpc/kernel/prom.c b/arch/powerpc/kernel/prom.c > index 87a68e2dc531..4181ec715f88 100644 > --- a/arch/powerpc/kernel/prom.c > +++ b/arch/powerpc/kernel/prom.c > @@ -124,8 +124,8 @@ static void __init move_device_tree(void) > size = fdt_totalsize(initial_boot_params); > > if ((memory_limit && (start + size) > PHYSICAL_START + memory_limit) || > - overlaps_crashkernel(start, size) || > - overlaps_initrd(start, size)) { > + !memblock_is_memory(start + size - 1) || > + overlaps_crashkernel(start, size) || overlaps_initrd(start, size)) { > p = __va(memblock_phys_alloc(size, PAGE_SIZE)); > memcpy(p, initial_boot_params, size); > initial_boot_params = p; > -- > 2.13.3
[PATCH] powerpc/prom: move the device tree if not in declared memory.
If the device tree doesn't reside in the memory which is declared inside it, it has to be moved as well as this memory will not be mapped by the kernel. Signed-off-by: Christophe Leroy --- arch/powerpc/kernel/prom.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/arch/powerpc/kernel/prom.c b/arch/powerpc/kernel/prom.c index 87a68e2dc531..4181ec715f88 100644 --- a/arch/powerpc/kernel/prom.c +++ b/arch/powerpc/kernel/prom.c @@ -124,8 +124,8 @@ static void __init move_device_tree(void) size = fdt_totalsize(initial_boot_params); if ((memory_limit && (start + size) > PHYSICAL_START + memory_limit) || - overlaps_crashkernel(start, size) || - overlaps_initrd(start, size)) { + !memblock_is_memory(start + size - 1) || + overlaps_crashkernel(start, size) || overlaps_initrd(start, size)) { p = __va(memblock_phys_alloc(size, PAGE_SIZE)); memcpy(p, initial_boot_params, size); initial_boot_params = p; -- 2.13.3