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From: Mark Rutland <mark.rutland@arm.com>
To: Marco Elver <elver@google.com>
Cc: akiyks@gmail.com, stern@rowland.harvard.edu, glider@google.com,
	parri.andrea@gmail.com, andreyknvl@google.com, luto@kernel.org,
	ard.biesheuvel@linaro.org, arnd@arndb.de, boqun.feng@gmail.com,
	bp@alien8.de, dja@axtens.net, dlustig@nvidia.com,
	dave.hansen@linux.intel.com, dhowells@redhat.com,
	dvyukov@google.com, hpa@zytor.com, mingo@redhat.com,
	j.alglave@ucl.ac.uk, joel@joelfernandes.org, corbet@lwn.net,
	jpoimboe@redhat.com, luc.maranget@inria.fr, npiggin@gmail.com,
	paulmck@linux.ibm.com, peterz@infradead.org, tglx@linutronix.de,
	will@kernel.org, kasan-dev@googlegroups.com,
	linux-arch@vger.kernel.org, linux-doc@vger.kernel.org,
	linux-efi@vger.kernel.org, linux-kbuild@vger.kernel.org,
	linux-kernel@vger.kernel.org, linux-mm@kvack.org, x86@kernel.org
Subject: Re: [PATCH v2 8/8] x86, kcsan: Enable KCSAN for x86
Date: Tue, 22 Oct 2019 13:59:22 +0100	[thread overview]
Message-ID: <20191022125921.GD11583@lakrids.cambridge.arm.com> (raw)
In-Reply-To: <20191017141305.146193-9-elver@google.com>

On Thu, Oct 17, 2019 at 04:13:05PM +0200, Marco Elver wrote:
> This patch enables KCSAN for x86, with updates to build rules to not use
> KCSAN for several incompatible compilation units.
> 
> Signed-off-by: Marco Elver <elver@google.com>
> ---
> v2:
> * Document build exceptions where no previous above comment explained
>   why we cannot instrument.
> ---
>  arch/x86/Kconfig                      | 1 +
>  arch/x86/boot/Makefile                | 2 ++
>  arch/x86/boot/compressed/Makefile     | 2 ++
>  arch/x86/entry/vdso/Makefile          | 3 +++
>  arch/x86/include/asm/bitops.h         | 6 +++++-
>  arch/x86/kernel/Makefile              | 7 +++++++
>  arch/x86/kernel/cpu/Makefile          | 3 +++
>  arch/x86/lib/Makefile                 | 4 ++++
>  arch/x86/mm/Makefile                  | 3 +++
>  arch/x86/purgatory/Makefile           | 2 ++
>  arch/x86/realmode/Makefile            | 3 +++
>  arch/x86/realmode/rm/Makefile         | 3 +++
>  drivers/firmware/efi/libstub/Makefile | 2 ++
>  13 files changed, 40 insertions(+), 1 deletion(-)

> diff --git a/drivers/firmware/efi/libstub/Makefile b/drivers/firmware/efi/libstub/Makefile
> index 0460c7581220..693d0a94b118 100644
> --- a/drivers/firmware/efi/libstub/Makefile
> +++ b/drivers/firmware/efi/libstub/Makefile
> @@ -31,7 +31,9 @@ KBUILD_CFLAGS			:= $(cflags-y) -DDISABLE_BRANCH_PROFILING \
>  				   -D__DISABLE_EXPORTS
>  
>  GCOV_PROFILE			:= n
> +# Sanitizer runtimes are unavailable and cannot be linked here.
>  KASAN_SANITIZE			:= n
> +KCSAN_SANITIZE			:= n
>  UBSAN_SANITIZE			:= n
>  OBJECT_FILES_NON_STANDARD	:= y

Not a big deal, but it might make sense to move the EFI stub exception
to patch 3 since it isn't x86 specific (and will also apply for arm64).

Otherwise this looks good to me.

Thanks,
Mark.

  reply	other threads:[~2019-10-22 12:59 UTC|newest]

Thread overview: 36+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-10-17 14:12 [PATCH v2 0/8] Add Kernel Concurrency Sanitizer (KCSAN) Marco Elver
2019-10-17 14:12 ` [PATCH v2 1/8] kcsan: Add Kernel Concurrency Sanitizer infrastructure Marco Elver
2019-10-21 13:37   ` Alexander Potapenko
2019-10-21 15:54     ` Marco Elver
2019-10-22 14:11   ` Mark Rutland
2019-10-22 16:52     ` Marco Elver
2019-10-22 15:48   ` Oleg Nesterov
2019-10-22 17:42     ` Marco Elver
2019-10-23 16:24       ` Oleg Nesterov
2019-10-24 11:02         ` Marco Elver
2019-10-23  9:41   ` Dmitry Vyukov
2019-10-23  9:56   ` Dmitry Vyukov
2019-10-23 10:03   ` Dmitry Vyukov
2019-10-23 10:09   ` Dmitry Vyukov
2019-10-23 10:28   ` Dmitry Vyukov
2019-10-23 11:08   ` Dmitry Vyukov
2019-10-23 11:20   ` Dmitry Vyukov
2019-10-23 12:05   ` Dmitry Vyukov
2019-10-23 12:32   ` Dmitry Vyukov
2019-10-17 14:12 ` [PATCH v2 2/8] objtool, kcsan: Add KCSAN runtime functions to whitelist Marco Elver
2019-10-21 15:15   ` Dmitry Vyukov
2019-10-21 15:43     ` Marco Elver
2019-10-17 14:13 ` [PATCH v2 3/8] build, kcsan: Add KCSAN build exceptions Marco Elver
2019-10-17 14:13 ` [PATCH v2 4/8] seqlock, kcsan: Add annotations for KCSAN Marco Elver
2019-10-24 12:28   ` Mark Rutland
2019-10-24 14:17     ` Marco Elver
2019-10-24 16:35       ` Mark Rutland
2019-10-24 17:09         ` Marco Elver
2019-10-17 14:13 ` [PATCH v2 5/8] seqlock: Require WRITE_ONCE surrounding raw_seqcount_barrier Marco Elver
2019-10-17 14:13 ` [PATCH v2 6/8] asm-generic, kcsan: Add KCSAN instrumentation for bitops Marco Elver
2019-10-17 14:13 ` [PATCH v2 7/8] locking/atomics, kcsan: Add KCSAN instrumentation Marco Elver
2019-10-22 12:33   ` Mark Rutland
2019-10-22 18:17     ` Marco Elver
2019-10-17 14:13 ` [PATCH v2 8/8] x86, kcsan: Enable KCSAN for x86 Marco Elver
2019-10-22 12:59   ` Mark Rutland [this message]
2019-10-22 13:02     ` Marco Elver

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