From: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
To: Will Deacon <will@kernel.org>
Cc: linux-arch@vger.kernel.org, kernel-team@android.com,
Quentin Perret <qperret@google.com>,
Peter Zijlstra <peterz@infradead.org>,
Catalin Marinas <catalin.marinas@arm.com>,
Qais Yousef <qais.yousef@arm.com>, Marc Zyngier <maz@kernel.org>,
Suren Baghdasaryan <surenb@google.com>,
Morten Rasmussen <morten.rasmussen@arm.com>,
linux-arm-kernel@lists.infradead.org
Subject: Re: [PATCH v2 5/6] arm64: Advertise CPUs capable of running 32-bit applications in sysfs
Date: Tue, 10 Nov 2020 08:04:26 +0100 [thread overview]
Message-ID: <X6o7euVw0QlysIPV@kroah.com> (raw)
In-Reply-To: <20201109213023.15092-6-will@kernel.org>
On Mon, Nov 09, 2020 at 09:30:21PM +0000, Will Deacon wrote:
> Since 32-bit applications will be killed if they are caught trying to
> execute on a 64-bit-only CPU in a mismatched system, advertise the set
> of 32-bit capable CPUs to userspace in sysfs.
>
> Signed-off-by: Will Deacon <will@kernel.org>
> ---
> .../ABI/testing/sysfs-devices-system-cpu | 9 +++++++++
> arch/arm64/kernel/cpufeature.c | 19 +++++++++++++++++++
> 2 files changed, 28 insertions(+)
I still think the "kill processes that can not run on this CPU" is crazy
but that has nothing to do with this sysfs file patch, which looks good
to me:
Reviewed-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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next prev parent reply other threads:[~2020-11-10 7:05 UTC|newest]
Thread overview: 18+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-11-09 21:30 [PATCH v2 0/6] An alternative series for asymmetric AArch32 systems Will Deacon
2020-11-09 21:30 ` [PATCH v2 1/6] arm64: cpuinfo: Split AArch32 registers out into a separate struct Will Deacon
2020-11-09 21:30 ` [PATCH v2 2/6] arm64: Allow mismatched 32-bit EL0 support Will Deacon
2020-11-11 19:10 ` Catalin Marinas
2020-11-13 9:36 ` Will Deacon
2020-11-13 10:26 ` Catalin Marinas
2020-11-09 21:30 ` [PATCH v2 3/6] KVM: arm64: Kill 32-bit vCPUs on systems with mismatched " Will Deacon
2020-11-10 9:33 ` Marc Zyngier
2020-11-09 21:30 ` [PATCH v2 4/6] arm64: Kill 32-bit applications scheduled on 64-bit-only CPUs Will Deacon
2020-11-09 21:30 ` [PATCH v2 5/6] arm64: Advertise CPUs capable of running 32-bit applications in sysfs Will Deacon
2020-11-10 7:04 ` Greg Kroah-Hartman [this message]
2020-11-10 9:28 ` Catalin Marinas
2020-11-10 9:36 ` Greg Kroah-Hartman
2020-11-10 9:53 ` Marc Zyngier
2020-11-10 10:10 ` Greg Kroah-Hartman
2020-11-10 10:46 ` Marc Zyngier
2020-11-10 10:57 ` Catalin Marinas
2020-11-09 21:30 ` [PATCH v2 6/6] arm64: Hook up cmdline parameter to allow mismatched 32-bit EL0 Will Deacon
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