From: Rohan McLure <rmclure@linux.ibm.com>
To: linuxppc-dev@lists.ozlabs.org
Cc: Rohan McLure <rmclure@linux.ibm.com>, npiggin@gmail.com
Subject: [PATCH v2 0/5] powerpc: Add KCSAN support
Date: Wed, 1 Feb 2023 15:34:33 +1100 [thread overview]
Message-ID: <20230201043438.1301212-1-rmclure@linux.ibm.com> (raw)
Add Kernel Concurrency Sanitiser support for powerpc. Doing so involves
exclusion of a number of compilation units from instrumentation, as was
done with KASAN.
KCSAN uses watchpoints on memory accesses to enforce the semantics of
the Linux kernel memory model, notifying the user of observed data races
which have not been declared to be intended in source through the
data_race() macro, in order to remove false positives.
A number of such race conditions are identified. This patch series
provides support for the instrumentation, with bug fixes as well as
removal of false positives to be issued in future patches.
v2: Implement __smp_mb() in terms of __mb() to avoid multiple calls to
kcsan_mb().
v1: https://lore.kernel.org/linuxppc-dev/20230131234859.1275125-1-rmclure@linux.ibm.com/
Rohan McLure (5):
powerpc: kcsan: Add exclusions from instrumentation
powerpc: kcsan: Exclude udelay to prevent recursive instrumentation
powerpc: kcsan: Memory barriers semantics
powerpc: kcsan: Prevent recursive instrumentation with IRQ
save/restores
powerpc: kcsan: Add KCSAN Support
arch/powerpc/Kconfig | 1 +
arch/powerpc/include/asm/barrier.h | 12 ++++++------
arch/powerpc/kernel/Makefile | 10 ++++++++++
arch/powerpc/kernel/irq_64.c | 6 +++---
arch/powerpc/kernel/time.c | 4 ++--
arch/powerpc/kernel/trace/Makefile | 1 +
arch/powerpc/kernel/vdso/Makefile | 1 +
arch/powerpc/lib/Makefile | 2 ++
arch/powerpc/purgatory/Makefile | 1 +
arch/powerpc/xmon/Makefile | 1 +
10 files changed, 28 insertions(+), 11 deletions(-)
--
2.37.2
next reply other threads:[~2023-02-01 4:36 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-02-01 4:34 Rohan McLure [this message]
2023-02-01 4:34 ` [PATCH v2 1/5] powerpc: kcsan: Add exclusions from instrumentation Rohan McLure
2023-02-01 4:34 ` [PATCH v2 2/5] powerpc: kcsan: Exclude udelay to prevent recursive instrumentation Rohan McLure
2023-02-01 4:34 ` [PATCH v2 3/5] powerpc: kcsan: Memory barriers semantics Rohan McLure
2023-02-01 4:34 ` [PATCH v2 4/5] powerpc: kcsan: Prevent recursive instrumentation with IRQ save/restores Rohan McLure
2023-02-01 4:34 ` [PATCH v2 5/5] powerpc: kcsan: Add KCSAN Support Rohan McLure
2023-02-04 12:10 ` kernel test robot
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