linux-kernel - [RFC PATCH 0/3] Make allmodconfig boot in qemu-arm64

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Message-Id: <20181213122910.24193-1-anders.roxell@linaro.org>
Date:   Thu, 13 Dec 2018 13:29:07 +0100
From:   Anders Roxell <anders.roxell@...aro.org>
To:     linux-kernel@...r.kernel.org
Cc:     catalin.marinas@....com, will.deacon@....com, arnd@...db.de,
        mingo@...hat.com, rostedt@...dmis.org, akpm@...ux-foundation.org,
        broonie@...nel.org, Anders Roxell <anders.roxell@...aro.org>
Subject: [RFC PATCH 0/3] Make allmodconfig boot in qemu-arm64

Hi,

With this patch set I've been able to get a allmodconfig kernel to boot
under qemu-system-aarch64.

The patch "config: provide a fragment to enable gdb for qemu" I found
useful when trying to figure out how it fall over. So when I have to
debug a kernel with gdb I just ran this:
$ make ARCH=arm64 CROSS_COMPILE=aarch64-linux-gnu- -skj$(getconf
_NPROCESSORS_ONLN) O=obj-arm64-next-20181213 allmodconfig
kvm_guest.config qemu-gdb.config
$ make ARCH=arm64 CROSS_COMPILE=aarch64-linux-gnu- -skj$(getconf
_NPROCESSORS_ONLN) O=obj-arm64-next-20181213 Image

Before we do the same job on other architectures we wanted to reach out
and ask to see if this seams a reasonable way forward ?

The end goal would be to be able to run test suites on a allmodconfig
kernel. We may end up with another fragment that turn off/on a lot of
debug options and selftests during boot up since that may cause issues
for other test suites like kseftest, LTP and so on.

Cheers,
Anders

Anders Roxell (3):
  config: provide a fragment to enable gdb for qemu
  lib/ubsan: default UBSAN_ALIGNMENT to not set
  arm64: add a new config option KTEST_RUNNABLE

 arch/arm64/Kconfig             |  8 ++++++++
 drivers/tty/hvc/Kconfig        |  1 +
 init/Kconfig                   |  1 +
 kernel/configs/qemu-gdb.config |  7 +++++++
 lib/Kconfig.ubsan              | 14 +++++++++-----
 5 files changed, 26 insertions(+), 5 deletions(-)
 create mode 100644 kernel/configs/qemu-gdb.config

-- 
2.19.2