Florian Fainelli <f.fainelli@xxxxxxxxx> writes: > 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. While the issue is a bit obscure, I know I've hit it as well. I agree that it's a good stable candidate, so unless you'd like to pick it yourself and cc stable, I'll just send you a PR doing so when rc1 rolls around.
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