[PATCH 0/6 v14] KASan for Arm

[Linus Walleij]

On Thu, Oct 1, 2020 at 9:19 PM Florian Fainelli <f.fainelli at gmail.com> wrote:

> The physical memory map looks like this:
>
> 0..3GB -> DRAM
> 3GB..4GB -> Registers, Boot ROM, Boot SRAM
> 4GB..12GB -> DRAM extension

So plenty of highmem, and then with LPAE you have
theoretically 12 GB of RAM. In an ARM32 system?

I think Arnd is gonna love this system for our highmem
experiments if that is something that is going to happen
often... Is that DRAM extension often mounted and
used?

> > Are these Broadcom chips hard to get for me?
>
> Yes they are hard for you to get.

Isn't one of them this beast:
https://www.ebay.com/c/502488121

Or do you mean that this device is locked down like
a fortress and not really hackable? There seems to
be a UART on the back and all.

> Have you got your hands on a Raspberry Pi 4? That one would be
> quite similar to one of our Broadcom STB chips (7211) and I would be
> curious to know if it even works there.

Pi 3 and 4 are 64bit Cortex A53 and A72 CPUs IIUC, so they
are in arch/arm64 and does not have this problem.

Your systems are curiously interesting, there is copious
highmem etc.

Yours,
Linus Walleij