Re: [PATCH] m68k: Implement kernel memory protection

[Michael Schmitz <schmitzmic@gmail.com>]

Daniel,

take a look at arch/m68k/kernel/head.S - 030 MMU setup uses early 
termination descriptors for kernel memory, _not_ regular page tables.

Cheers,

	Michael


Am 17.11.2025 um 22:42 schrieb Daniel Palmer:
> Hi Greg,
>
> On Mon, 17 Nov 2025 at 12:04, Greg Ungerer <gerg@kernel.org> wrote:
>> Seems to work fine on real ColdFire hardware (tested on an M5475 -
>> that is one that has an MMU):
>
> Thanks for testing. I just tried on my MVME147 (030) and the marking
> RO seems to work but it locks up starting init:
>
> [    6.520000] devtmpfs: mounted
> [    6.540000] Freeing unused kernel image (initmem) memory: 120K
> [    6.550000] Write protecting kernel text: 0x2000 - 0x3676f0
> [    6.560000] Write protecting kernel read-only data: 0x36a000 - 0x3be000
> [    6.580000] rodata_test: all tests were successful
> [    6.590000] Run /sbin/init as init process
> <dead>
>
> My 060 Amiga 4000 seems ok. So I guess some 030 mmu issue. I'll debug
> and send again..
>
> Thanks!
>
> Daniel
>