[PATCH v2 0/3] arm64: Add support for handling memory corruption

[Punit Agrawal <punit.agrawal@arm.com>]

Hi,

This series enables memory failure handling for arm64. Previous
posting can be found at [0].

Changes since v1:

* Reworked Patch 1 based on Catalin's feedbak to symmetrically deal
  with PUD and PMD hugepages in huge_pte_offset()
* Added Steve's acks

With support for contiguous hugepages being turned off[1], some of the
problems arising from swap entries go away[2]. This simplifies the
changes needed to enable memory corruption handling for arm64 (done in
this seris).

In this series, we updates huge_pte_offset() to correctly deal with
swap entries (Patch 1). This function will need to be updated when
contiguous hugepages are re-enabled.

Patch 2 adds support to send SIGBUS to processes that have their
memory corrupted. With the prerequisites in place, enable memory
corruption handling for arm64 (patch 3).

Thanks,
Punit

[0] https://www.mail-archive.com/linux-kernel@vger.kernel.org/msg1376052.html
[1] https://lkml.org/lkml/2017/4/7/486
[2] https://lkml.org/lkml/2017/4/5/402

Jonathan (Zhixiong) Zhang (2):
  arm64: hwpoison: add VM_FAULT_HWPOISON[_LARGE] handling
  arm64: kconfig: allow support for memory failure handling

Punit Agrawal (1):
  arm64: hugetlb: Fix huge_pte_offset to return poisoned page table
    entries

 arch/arm64/Kconfig               |  1 +
 arch/arm64/include/asm/pgtable.h |  2 +-
 arch/arm64/mm/fault.c            | 22 +++++++++++++++++++---
 arch/arm64/mm/hugetlbpage.c      | 29 ++++++++++-------------------
 4 files changed, 31 insertions(+), 23 deletions(-)

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2.11.0