From: Will Deacon <will@kernel.org>
To: linux-arm-kernel@lists.infradead.org
Cc: linux-arch@vger.kernel.org, Will Deacon <will@kernel.org>,
Catalin Marinas <catalin.marinas@arm.com>,
Marc Zyngier <maz@kernel.org>,
Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
Peter Zijlstra <peterz@infradead.org>,
Morten Rasmussen <morten.rasmussen@arm.com>,
Qais Yousef <qais.yousef@arm.com>,
Suren Baghdasaryan <surenb@google.com>,
kernel-team@android.com
Subject: [PATCH 0/6] An alternative series for asymmetric AArch32 systems
Date: Tue, 27 Oct 2020 21:51:12 +0000 [thread overview]
Message-ID: <20201027215118.27003-1-will@kernel.org> (raw)
Hi all,
I was playing around with the asymmetric AArch32 RFCv2 from Qais:
https://lore.kernel.org/r/20201021104611.2744565-1-qais.yousef@arm.com
and ended up writing my own implementation this afternoon. I think it's
smaller, simpler and easier to work with. In particular:
* I got rid of the sysctl in favour of a plain cmdline parameter
* I don't have a new CPU capability
* I don't have a new thread flag
* I expose a cpumask to userspace via sysfs to identify the 32-bit CPUs
Anyway, I don't think we should merge this stuff (other than the first patch)
until we've figured out what's going on in Android, but I wanted to get
this out as something which we might be able to build on.
Cheers,
Will
Cc: Catalin Marinas <catalin.marinas@arm.com>
Cc: Marc Zyngier <maz@kernel.org>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Morten Rasmussen <morten.rasmussen@arm.com>
Cc: Qais Yousef <qais.yousef@arm.com>
Cc: Suren Baghdasaryan <surenb@google.com>
Cc: kernel-team@android.com
--->8
Qais Yousef (1):
KVM: arm64: Handle Asymmetric AArch32 systems
Will Deacon (5):
arm64: Allow mismatched 32-bit EL0 support
KVM: arm64: Kill 32-bit vCPUs on systems with mismatched EL0 support
arm64: Kill 32-bit applications scheduled on 64-bit-only CPUs
arm64: Advertise CPUs capable of running 32-bit applcations in sysfs
arm64: Hook up cmdline parameter to allow mismatched 32-bit EL0
.../ABI/testing/sysfs-devices-system-cpu | 8 ++
.../admin-guide/kernel-parameters.txt | 7 ++
arch/arm64/include/asm/cpufeature.h | 3 +
arch/arm64/kernel/cpufeature.c | 80 ++++++++++++++++++-
arch/arm64/kernel/process.c | 21 ++++-
arch/arm64/kernel/signal.c | 26 ++++++
arch/arm64/kvm/arm.c | 27 +++++++
7 files changed, 168 insertions(+), 4 deletions(-)
--
2.29.0.rc2.309.g374f81d7ae-goog
WARNING: multiple messages have this Message-ID (diff)
From: Will Deacon <will@kernel.org>
To: linux-arm-kernel@lists.infradead.org
Cc: linux-arch@vger.kernel.org, Marc Zyngier <maz@kernel.org>,
kernel-team@android.com, Peter Zijlstra <peterz@infradead.org>,
Catalin Marinas <catalin.marinas@arm.com>,
Qais Yousef <qais.yousef@arm.com>,
Suren Baghdasaryan <surenb@google.com>,
Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
Will Deacon <will@kernel.org>,
Morten Rasmussen <morten.rasmussen@arm.com>
Subject: [PATCH 0/6] An alternative series for asymmetric AArch32 systems
Date: Tue, 27 Oct 2020 21:51:12 +0000 [thread overview]
Message-ID: <20201027215118.27003-1-will@kernel.org> (raw)
Hi all,
I was playing around with the asymmetric AArch32 RFCv2 from Qais:
https://lore.kernel.org/r/20201021104611.2744565-1-qais.yousef@arm.com
and ended up writing my own implementation this afternoon. I think it's
smaller, simpler and easier to work with. In particular:
* I got rid of the sysctl in favour of a plain cmdline parameter
* I don't have a new CPU capability
* I don't have a new thread flag
* I expose a cpumask to userspace via sysfs to identify the 32-bit CPUs
Anyway, I don't think we should merge this stuff (other than the first patch)
until we've figured out what's going on in Android, but I wanted to get
this out as something which we might be able to build on.
Cheers,
Will
Cc: Catalin Marinas <catalin.marinas@arm.com>
Cc: Marc Zyngier <maz@kernel.org>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Morten Rasmussen <morten.rasmussen@arm.com>
Cc: Qais Yousef <qais.yousef@arm.com>
Cc: Suren Baghdasaryan <surenb@google.com>
Cc: kernel-team@android.com
--->8
Qais Yousef (1):
KVM: arm64: Handle Asymmetric AArch32 systems
Will Deacon (5):
arm64: Allow mismatched 32-bit EL0 support
KVM: arm64: Kill 32-bit vCPUs on systems with mismatched EL0 support
arm64: Kill 32-bit applications scheduled on 64-bit-only CPUs
arm64: Advertise CPUs capable of running 32-bit applcations in sysfs
arm64: Hook up cmdline parameter to allow mismatched 32-bit EL0
.../ABI/testing/sysfs-devices-system-cpu | 8 ++
.../admin-guide/kernel-parameters.txt | 7 ++
arch/arm64/include/asm/cpufeature.h | 3 +
arch/arm64/kernel/cpufeature.c | 80 ++++++++++++++++++-
arch/arm64/kernel/process.c | 21 ++++-
arch/arm64/kernel/signal.c | 26 ++++++
arch/arm64/kvm/arm.c | 27 +++++++
7 files changed, 168 insertions(+), 4 deletions(-)
--
2.29.0.rc2.309.g374f81d7ae-goog
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next reply other threads:[~2020-10-27 21:51 UTC|newest]
Thread overview: 96+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-10-27 21:51 Will Deacon [this message]
2020-10-27 21:51 ` [PATCH 0/6] An alternative series for asymmetric AArch32 systems Will Deacon
2020-10-27 21:51 ` [PATCH 1/6] KVM: arm64: Handle Asymmetric " Will Deacon
2020-10-27 21:51 ` Will Deacon
2020-10-27 21:51 ` [PATCH 2/6] arm64: Allow mismatched 32-bit EL0 support Will Deacon
2020-10-27 21:51 ` Will Deacon
2020-10-28 11:12 ` Catalin Marinas
2020-10-28 11:12 ` Catalin Marinas
2020-10-28 11:17 ` Will Deacon
2020-10-28 11:17 ` Will Deacon
2020-10-28 11:22 ` Catalin Marinas
2020-10-28 11:22 ` Catalin Marinas
2020-10-28 11:23 ` Will Deacon
2020-10-28 11:23 ` Will Deacon
2020-10-28 11:49 ` Catalin Marinas
2020-10-28 11:49 ` Catalin Marinas
2020-10-28 12:40 ` Will Deacon
2020-10-28 12:40 ` Will Deacon
2020-10-28 18:56 ` Catalin Marinas
2020-10-28 18:56 ` Catalin Marinas
2020-10-29 22:20 ` Will Deacon
2020-10-29 22:20 ` Will Deacon
2020-10-30 11:18 ` Catalin Marinas
2020-10-30 11:18 ` Catalin Marinas
2020-10-30 16:13 ` Will Deacon
2020-10-30 16:13 ` Will Deacon
2020-11-02 11:44 ` Catalin Marinas
2020-11-02 11:44 ` Catalin Marinas
2020-11-05 21:38 ` Will Deacon
2020-11-05 21:38 ` Will Deacon
2020-11-06 12:54 ` Qais Yousef
2020-11-06 12:54 ` Qais Yousef
2020-11-06 13:00 ` Will Deacon
2020-11-06 13:00 ` Will Deacon
2020-11-06 14:48 ` Qais Yousef
2020-11-06 14:48 ` Qais Yousef
2020-11-09 13:52 ` Will Deacon
2020-11-09 13:52 ` Will Deacon
2020-11-11 16:27 ` Qais Yousef
2020-11-11 16:27 ` Qais Yousef
2020-11-12 10:24 ` Will Deacon
2020-11-12 10:24 ` Will Deacon
2020-11-12 11:55 ` Qais Yousef
2020-11-12 11:55 ` Qais Yousef
2020-11-12 16:49 ` Qais Yousef
2020-11-12 16:49 ` Qais Yousef
2020-11-12 17:06 ` Marc Zyngier
2020-11-12 17:06 ` Marc Zyngier
2020-11-12 17:36 ` Qais Yousef
2020-11-12 17:36 ` Qais Yousef
2020-11-12 17:44 ` Will Deacon
2020-11-12 17:44 ` Will Deacon
2020-11-12 17:36 ` Will Deacon
2020-11-12 17:36 ` Will Deacon
2020-11-13 10:45 ` Qais Yousef
2020-11-13 10:45 ` Qais Yousef
2020-11-06 14:30 ` Catalin Marinas
2020-11-06 14:30 ` Catalin Marinas
2020-10-28 11:18 ` Catalin Marinas
2020-10-28 11:18 ` Catalin Marinas
2020-10-28 11:21 ` Will Deacon
2020-10-28 11:21 ` Will Deacon
2020-10-27 21:51 ` [PATCH 3/6] KVM: arm64: Kill 32-bit vCPUs on systems with mismatched " Will Deacon
2020-10-27 21:51 ` Will Deacon
2020-10-27 21:51 ` [PATCH 4/6] arm64: Kill 32-bit applications scheduled on 64-bit-only CPUs Will Deacon
2020-10-27 21:51 ` Will Deacon
2020-10-28 12:10 ` Catalin Marinas
2020-10-28 12:10 ` Catalin Marinas
2020-10-28 12:36 ` Will Deacon
2020-10-28 12:36 ` Will Deacon
2020-10-27 21:51 ` [PATCH 5/6] arm64: Advertise CPUs capable of running 32-bit applcations in sysfs Will Deacon
2020-10-27 21:51 ` Will Deacon
2020-10-28 8:37 ` Greg Kroah-Hartman
2020-10-28 8:37 ` Greg Kroah-Hartman
2020-10-28 9:51 ` Will Deacon
2020-10-28 9:51 ` Will Deacon
2020-10-28 12:15 ` Catalin Marinas
2020-10-28 12:15 ` Catalin Marinas
2020-10-28 12:27 ` Will Deacon
2020-10-28 12:27 ` Will Deacon
2020-10-28 15:14 ` Catalin Marinas
2020-10-28 15:14 ` Catalin Marinas
2020-10-28 15:35 ` Will Deacon
2020-10-28 15:35 ` Will Deacon
2020-10-27 21:51 ` [PATCH 6/6] arm64: Hook up cmdline parameter to allow mismatched 32-bit EL0 Will Deacon
2020-10-27 21:51 ` Will Deacon
2020-10-29 18:42 ` [PATCH 0/6] An alternative series for asymmetric AArch32 systems Suren Baghdasaryan
2020-10-29 18:42 ` Suren Baghdasaryan
2020-10-29 22:17 ` Will Deacon
2020-10-29 22:17 ` Will Deacon
2020-10-30 16:16 ` Marc Zyngier
2020-10-30 16:16 ` Marc Zyngier
2020-10-30 16:24 ` Will Deacon
2020-10-30 16:24 ` Will Deacon
2020-10-30 17:04 ` Marc Zyngier
2020-10-30 17:04 ` Marc Zyngier
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