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From:   Max Filippov <jcmvbkbc@gmail.com>
To:     linux-xtensa@linux-xtensa.org
Cc:     Chris Zankel <chris@zankel.net>, linux-kernel@vger.kernel.org,
        Max Filippov <jcmvbkbc@gmail.com>
Subject: [PATCH v3 0/3] xtensa: add division by zero exception handler
Date:   Tue, 17 May 2022 03:44:55 -0700
Message-Id: <20220517104458.257799-1-jcmvbkbc@gmail.com>
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Hello,

this series adds handlers for hardware and artificial division by zero
exceptions and improves call0 ABI probing in the presence of unrelated
illegal instructions.

Changes v2->v3:

- simplify artificial division by 0 handler

Changes v1->v2:

- split ABI probing improvement from the artificial division by 0
- don't limit artificial division by 0 pattern detection to
  configurations without HW division opcodes, do it always

Max Filippov (3):
  xtensa: add trap handler for division by zero
  xtensa: support artificial division by 0 exception
  xtensa: improve call0 ABI probing

 arch/xtensa/include/asm/thread_info.h |  4 +++
 arch/xtensa/kernel/asm-offsets.c      |  3 ++
 arch/xtensa/kernel/entry.S            |  5 ++++
 arch/xtensa/kernel/traps.c            | 43 ++++++++++++++++++++++++++-
 4 files changed, 54 insertions(+), 1 deletion(-)

-- 
2.30.2