linux-kernel - [PATCH v16 0/4] KASAN core changes for ppc64 radix KASAN

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Message-Id: <20210624034050.511391-1-dja@axtens.net>
Date:   Thu, 24 Jun 2021 13:40:46 +1000
From:   Daniel Axtens <dja@...ens.net>
To:     linux-kernel@...r.kernel.org, linux-mm@...ck.org,
        kasan-dev@...glegroups.com, elver@...gle.com,
        akpm@...ux-foundation.org, andreyknvl@...il.com
Cc:     linuxppc-dev@...ts.ozlabs.org, christophe.leroy@...roup.eu,
        aneesh.kumar@...ux.ibm.com, bsingharora@...il.com,
        Daniel Axtens <dja@...ens.net>
Subject: [PATCH v16 0/4] KASAN core changes for ppc64 radix KASAN

Building on the work of Christophe, Aneesh and Balbir, I've ported
KASAN to 64-bit Book3S kernels running on the Radix MMU. I've been
trying this for a while, but we keep having collisions between the
kasan code in the mm tree and the code I want to put in to the ppc
tree.

This series just contains the kasan core changes that we need. These
can go in via the mm tree. I will then propose the powerpc changes for
a later cycle. (The most recent RFC for the powerpc changes is in the
v12 series at
https://lore.kernel.org/linux-mm/20210615014705.2234866-1-dja@axtens.net/
)

v16 applies to next-20210622. There should be no noticeable changes to
other platforms.

Changes since v15: Review comments from Andrey. Thanks Andrey.

Changes since v14: Included a bunch of Reviewed-by:s, thanks
Christophe and Marco. Cleaned up the build time error #ifdefs, thanks
Christophe.

Changes since v13: move the MAX_PTR_PER_* definitions out of kasan and
into pgtable.h. Add a build time error to hopefully prevent any
confusion about when the new hook is applicable. Thanks Marco and
Christophe.

Changes since v12: respond to Marco's review comments - clean up the
help for ARCH_DISABLE_KASAN_INLINE, and add an arch readiness check to
the new granule poisioning function. Thanks Marco.

Daniel Axtens (4):
  kasan: allow an architecture to disable inline instrumentation
  kasan: allow architectures to provide an outline readiness check
  mm: define default MAX_PTRS_PER_* in include/pgtable.h
  kasan: use MAX_PTRS_PER_* for early shadow tables

 arch/s390/include/asm/pgtable.h     |  2 --
 include/asm-generic/pgtable-nop4d.h |  1 -
 include/linux/kasan.h               |  6 +++---
 include/linux/pgtable.h             | 22 ++++++++++++++++++++++
 lib/Kconfig.kasan                   | 12 ++++++++++++
 mm/kasan/common.c                   |  3 +++
 mm/kasan/generic.c                  |  3 +++
 mm/kasan/init.c                     |  6 +++---
 mm/kasan/kasan.h                    |  6 ++++++
 mm/kasan/shadow.c                   |  6 ++++++
 10 files changed, 58 insertions(+), 9 deletions(-)

-- 
2.30.2