linux-kernel - [PATCH v2 0/2] kernel memory protection for m68k, 030 users too!

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Message-ID: <20251120103854.1630306-1-daniel@thingy.jp>
Date: Thu, 20 Nov 2025 19:38:52 +0900
From: Daniel Palmer <daniel@...ngy.jp>
To: geert@...ux-m68k.org,
	schmitzmic@...il.com,
	gerg@...nel.org,
	linux-m68k@...ts.linux-m68k.org
Cc: linux-kernel@...r.kernel.org,
	Daniel Palmer <daniel@...ngy.jp>
Subject: [PATCH v2 0/2] kernel memory protection for m68k, 030 users too!

This implements kernel memory protection for m68k.

Changes since v1:

- Add a patch to split the early termination that the tail of the ro
  data is on 020/030 so that we can get at the juicy pages on the inside.
- Since __ex_table is RO after init we can just mark from the start of
  the kernel to the end of the ro data in one pass so do that.
- While setting the WP bit if we find that we'd be marking too much
  memory, warn and abort.

Daniel Palmer (2):
  m68k: mm: motorola: Split the early term containing the end of the RO
    region
  m68k: Implement kernel memory protection

 arch/m68k/Kconfig       |  1 +
 arch/m68k/mm/init.c     | 73 +++++++++++++++++++++++++++++++++++++++++
 arch/m68k/mm/motorola.c | 47 ++++++++++++++++++++------
 3 files changed, 111 insertions(+), 10 deletions(-)

-- 
2.51.0