* [PATCH] powerpc/prom: move the device tree if not in declared memory.
@ 2018-12-17 14:18 Christophe Leroy
2018-12-19 4:42 ` Michael Ellerman
2018-12-22 9:54 ` Michael Ellerman
0 siblings, 2 replies; 3+ messages in thread
From: Christophe Leroy @ 2018-12-17 14:18 UTC (permalink / raw)
To: Benjamin Herrenschmidt, Paul Mackerras, Michael Ellerman
Cc: linuxppc-dev, linux-kernel
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 <christophe.leroy@c-s.fr>
---
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
^ permalink raw reply related [flat|nested] 3+ messages in thread* Re: [PATCH] powerpc/prom: move the device tree if not in declared memory.
2018-12-17 14:18 [PATCH] powerpc/prom: move the device tree if not in declared memory Christophe Leroy
@ 2018-12-19 4:42 ` Michael Ellerman
2018-12-22 9:54 ` Michael Ellerman
1 sibling, 0 replies; 3+ messages in thread
From: Michael Ellerman @ 2018-12-19 4:42 UTC (permalink / raw)
To: Christophe Leroy, Benjamin Herrenschmidt, Paul Mackerras
Cc: linuxppc-dev, linux-kernel
Christophe Leroy <christophe.leroy@c-s.fr> 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
^ permalink raw reply [flat|nested] 3+ messages in thread* Re: powerpc/prom: move the device tree if not in declared memory.
2018-12-17 14:18 [PATCH] powerpc/prom: move the device tree if not in declared memory Christophe Leroy
2018-12-19 4:42 ` Michael Ellerman
@ 2018-12-22 9:54 ` Michael Ellerman
1 sibling, 0 replies; 3+ messages in thread
From: Michael Ellerman @ 2018-12-22 9:54 UTC (permalink / raw)
To: Christophe Leroy, Benjamin Herrenschmidt, Paul Mackerras
Cc: linuxppc-dev, linux-kernel
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 <christophe.leroy@c-s.fr>
Applied to powerpc next, thanks.
https://git.kernel.org/powerpc/c/f242e0ac95cadb27527d0b06c95772
cheers
^ permalink raw reply [flat|nested] 3+ messages in thread
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2018-12-17 14:18 [PATCH] powerpc/prom: move the device tree if not in declared memory Christophe Leroy
2018-12-19 4:42 ` Michael Ellerman
2018-12-22 9:54 ` Michael Ellerman
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