Re: [PATCH V2] ARM: dts: bcm283x: Reserve first page for firmware

[Florian Fainelli]

On 05/09/2017 09:48 AM, Eric Anholt wrote:
> Phil Elwell <phil@xxxxxxxxxxxxxxx> writes:
> 
>> The Raspberry Pi startup stub files for multi-core BCM27XX processors
>> make the secondary CPUs spin until the corresponding mailbox is
>> written. These stubs are loaded at physical address 0x00000xxx (as seen
>> by the ARMs), but this page will be reused by the kernel unless it is
>> explicitly reserved, causing the waiting cores to execute random code.
>>
>> Use the /memreserve/ Device Tree directive to mark the first page as
>> off-limits to the kernel.
>>
>> See: https://github.com/raspberrypi/linux/issues/1989
>>
>> Signed-off-by: Phil Elwell <phil@xxxxxxxxxxxxxxx>
> 
> This looks great.  We're currently in the merge window, so I can't
> generate a new bcm2835-dt-next yet, but I'll pick this patch up when I
> do.
> 
> Thanks for submitting upstream!

Considering that this is a fix, we could actually squeeze it in the
devicetree/fixes branch and we could submit those as soon as v4.12-rc1
is tagged, your call.
-- 
Florian