[PATCH V2] ARM: dts: bcm283x: Reserve first page for firmware
afaerber at suse.de
Sun May 14 05:50:07 PDT 2017
Am 09.05.2017 um 11:04 schrieb Phil Elwell:
> The Raspberry Pi startup stub files for multi-core BCM27XX processors
Curiously, while this V2 was rebased to apply against the bcm283x rather
than bcm2710 file, it changed the text from BCM283X to BCM27XX.
> 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 at raspberrypi.org>
> Changes in V2:
> - Rebase against linux-next
> - Drop downstream-only patch
> arch/arm/boot/dts/bcm283x.dtsi | 2 ++
> 1 file changed, 2 insertions(+)
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