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Groups > linux.kernel > #1638284
| From | Florian Fainelli <f.fainelli@gmail.com> |
|---|---|
| Newsgroups | linux.kernel |
| Subject | Re: [PATCH V2] ARM: dts: bcm283x: Reserve first page for firmware |
| Date | 2017-05-09 19:00 +0200 |
| Message-ID | <tFgEq-4pa-9@gated-at.bofh.it> (permalink) |
| References | <tF9jz-89r-3@gated-at.bofh.it> <tFgEp-4pa-7@gated-at.bofh.it> |
| Organization | linux.* mail to news gateway |
On 05/09/2017 09:48 AM, Eric Anholt wrote: > Phil Elwell <phil@raspberrypi.org> 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@raspberrypi.org> > > 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
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[PATCH V2] ARM: dts: bcm283x: Reserve first page for firmware Phil Elwell <phil@raspberrypi.org> - 2017-05-09 11:10 +0200
Re: [PATCH V2] ARM: dts: bcm283x: Reserve first page for firmware Florian Fainelli <f.fainelli@gmail.com> - 2017-05-09 18:30 +0200
Re: [PATCH V2] ARM: dts: bcm283x: Reserve first page for firmware Florian Fainelli <f.fainelli@gmail.com> - 2017-05-09 19:00 +0200
Re: [PATCH V2] ARM: dts: bcm283x: Reserve first page for firmware Eric Anholt <eric@anholt.net> - 2017-05-09 20:20 +0200
Re: [PATCH V2] ARM: dts: bcm283x: Reserve first page for firmware Eric Anholt <eric@anholt.net> - 2017-05-09 19:00 +0200
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