From: Will Deacon <will@kernel.org> To: linux-arm-kernel@lists.infradead.org Cc: linux-arch@vger.kernel.org, linux-kernel@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>, Quentin Perret <qperret@google.com>, Tejun Heo <tj@kernel.org>, Johannes Weiner <hannes@cmpxchg.org>, Ingo Molnar <mingo@redhat.com>, Juri Lelli <juri.lelli@redhat.com>, Vincent Guittot <vincent.guittot@linaro.org>, "Rafael J. Wysocki" <rjw@rjwysocki.net>, Dietmar Eggemann <dietmar.eggemann@arm.com>, Daniel Bristot de Oliveira <bristot@redhat.com>, Valentin Schneider <valentin.schneider@arm.com>, Mark Rutland <mark.rutland@arm.com>, kernel-team@android.com Subject: [PATCH v9 00/20] Add support for 32-bit tasks on asymmetric AArch32 systems Date: Tue, 8 Jun 2021 19:02:53 +0100 [thread overview] Message-ID: <20210608180313.11502-1-will@kernel.org> (raw) Hi everyone, The sun is shining and its time for your weekly dose of asymmetric 32-bit support patches, previously seen at: v1: https://lore.kernel.org/r/20201027215118.27003-1-will@kernel.org v2: https://lore.kernel.org/r/20201109213023.15092-1-will@kernel.org v3: https://lore.kernel.org/r/20201113093720.21106-1-will@kernel.org v4: https://lore.kernel.org/r/20201124155039.13804-1-will@kernel.org v5: https://lore.kernel.org/r/20201208132835.6151-1-will@kernel.org v6: https://lore.kernel.org/r/20210518094725.7701-1-will@kernel.org v7: https://lore.kernel.org/r/20210525151432.16875-1-will@kernel.org v8: https://lore.kernel.org/r/20210602164719.31777-1-will@kernel.org There was also a nice LWN writeup in case you've forgotten what this is about: https://lwn.net/Articles/838339/ Changes since v8 include: * Renamed task_cpus_dl_admissible() and changed return type [Daniel] * Renamed update_mismatched_32bit_el0_cpu_features() [Mark R] * Improved comments [Mark R and Valentin] * Cleaned up cpuset_cpus_allowed_fallback() [Valentin] * Remove redundant rcu_read_{lock,unlock}() in cpuset_cpus_allowed() * Added some more acks/reviewed-by tags 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: Quentin Perret <qperret@google.com> Cc: Tejun Heo <tj@kernel.org> Cc: Johannes Weiner <hannes@cmpxchg.org> Cc: Ingo Molnar <mingo@redhat.com> Cc: Juri Lelli <juri.lelli@redhat.com> Cc: Vincent Guittot <vincent.guittot@linaro.org> Cc: "Rafael J. Wysocki" <rjw@rjwysocki.net> Cc: Dietmar Eggemann <dietmar.eggemann@arm.com> Cc: Daniel Bristot de Oliveira <bristot@redhat.com> Cc: Valentin Schneider <valentin.schneider@arm.com> Cc: Mark Rutland <mark.rutland@arm.com> Cc: kernel-team@android.com --->8 Will Deacon (20): arm64: cpuinfo: Split AArch32 registers out into a separate struct 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 sched: Introduce task_cpu_possible_mask() to limit fallback rq selection cpuset: Don't use the cpu_possible_mask as a last resort for cgroup v1 cpuset: Honour task_cpu_possible_mask() in guarantee_online_cpus() cpuset: Cleanup cpuset_cpus_allowed_fallback() use in select_fallback_rq() sched: Reject CPU affinity changes based on task_cpu_possible_mask() sched: Introduce task_struct::user_cpus_ptr to track requested affinity sched: Split the guts of sched_setaffinity() into a helper function sched: Allow task CPU affinity to be restricted on asymmetric systems sched: Introduce dl_task_check_affinity() to check proposed affinity arm64: Implement task_cpu_possible_mask() arm64: exec: Adjust affinity for compat tasks with mismatched 32-bit EL0 arm64: Prevent offlining first CPU with 32-bit EL0 on mismatched system arm64: Advertise CPUs capable of running 32-bit applications in sysfs arm64: Hook up cmdline parameter to allow mismatched 32-bit EL0 arm64: Remove logic to kill 32-bit tasks on 64-bit-only cores Documentation: arm64: describe asymmetric 32-bit support .../ABI/testing/sysfs-devices-system-cpu | 9 + .../admin-guide/kernel-parameters.txt | 11 + Documentation/arm64/asymmetric-32bit.rst | 155 ++++++++ Documentation/arm64/index.rst | 1 + arch/arm64/include/asm/cpu.h | 44 +-- arch/arm64/include/asm/cpufeature.h | 8 +- arch/arm64/include/asm/elf.h | 6 +- arch/arm64/include/asm/mmu_context.h | 13 + arch/arm64/kernel/cpufeature.c | 232 +++++++++--- arch/arm64/kernel/cpuinfo.c | 53 +-- arch/arm64/kernel/process.c | 44 ++- arch/arm64/kvm/arm.c | 11 +- arch/arm64/tools/cpucaps | 3 +- include/linux/cpuset.h | 8 +- include/linux/mmu_context.h | 14 + include/linux/sched.h | 21 ++ init/init_task.c | 1 + kernel/cgroup/cpuset.c | 59 +-- kernel/fork.c | 2 + kernel/sched/core.c | 340 ++++++++++++++---- kernel/sched/sched.h | 1 + 21 files changed, 841 insertions(+), 195 deletions(-) create mode 100644 Documentation/arm64/asymmetric-32bit.rst -- 2.32.0.rc1.229.g3e70b5a671-goog
WARNING: multiple messages have this Message-ID
From: Will Deacon <will@kernel.org> To: linux-arm-kernel@lists.infradead.org Cc: linux-arch@vger.kernel.org, linux-kernel@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>, Quentin Perret <qperret@google.com>, Tejun Heo <tj@kernel.org>, Johannes Weiner <hannes@cmpxchg.org>, Ingo Molnar <mingo@redhat.com>, Juri Lelli <juri.lelli@redhat.com>, Vincent Guittot <vincent.guittot@linaro.org>, "Rafael J. Wysocki" <rjw@rjwysocki.net>, Dietmar Eggemann <dietmar.eggemann@arm.com>, Daniel Bristot de Oliveira <bristot@redhat.com>, Valentin Schneider <valentin.schneider@arm.com>, Mark Rutland <mark.rutland@arm.com>, kernel-team@android.com Subject: [PATCH v9 00/20] Add support for 32-bit tasks on asymmetric AArch32 systems Date: Tue, 8 Jun 2021 19:02:53 +0100 [thread overview] Message-ID: <20210608180313.11502-1-will@kernel.org> (raw) Hi everyone, The sun is shining and its time for your weekly dose of asymmetric 32-bit support patches, previously seen at: v1: https://lore.kernel.org/r/20201027215118.27003-1-will@kernel.org v2: https://lore.kernel.org/r/20201109213023.15092-1-will@kernel.org v3: https://lore.kernel.org/r/20201113093720.21106-1-will@kernel.org v4: https://lore.kernel.org/r/20201124155039.13804-1-will@kernel.org v5: https://lore.kernel.org/r/20201208132835.6151-1-will@kernel.org v6: https://lore.kernel.org/r/20210518094725.7701-1-will@kernel.org v7: https://lore.kernel.org/r/20210525151432.16875-1-will@kernel.org v8: https://lore.kernel.org/r/20210602164719.31777-1-will@kernel.org There was also a nice LWN writeup in case you've forgotten what this is about: https://lwn.net/Articles/838339/ Changes since v8 include: * Renamed task_cpus_dl_admissible() and changed return type [Daniel] * Renamed update_mismatched_32bit_el0_cpu_features() [Mark R] * Improved comments [Mark R and Valentin] * Cleaned up cpuset_cpus_allowed_fallback() [Valentin] * Remove redundant rcu_read_{lock,unlock}() in cpuset_cpus_allowed() * Added some more acks/reviewed-by tags 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: Quentin Perret <qperret@google.com> Cc: Tejun Heo <tj@kernel.org> Cc: Johannes Weiner <hannes@cmpxchg.org> Cc: Ingo Molnar <mingo@redhat.com> Cc: Juri Lelli <juri.lelli@redhat.com> Cc: Vincent Guittot <vincent.guittot@linaro.org> Cc: "Rafael J. Wysocki" <rjw@rjwysocki.net> Cc: Dietmar Eggemann <dietmar.eggemann@arm.com> Cc: Daniel Bristot de Oliveira <bristot@redhat.com> Cc: Valentin Schneider <valentin.schneider@arm.com> Cc: Mark Rutland <mark.rutland@arm.com> Cc: kernel-team@android.com --->8 Will Deacon (20): arm64: cpuinfo: Split AArch32 registers out into a separate struct 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 sched: Introduce task_cpu_possible_mask() to limit fallback rq selection cpuset: Don't use the cpu_possible_mask as a last resort for cgroup v1 cpuset: Honour task_cpu_possible_mask() in guarantee_online_cpus() cpuset: Cleanup cpuset_cpus_allowed_fallback() use in select_fallback_rq() sched: Reject CPU affinity changes based on task_cpu_possible_mask() sched: Introduce task_struct::user_cpus_ptr to track requested affinity sched: Split the guts of sched_setaffinity() into a helper function sched: Allow task CPU affinity to be restricted on asymmetric systems sched: Introduce dl_task_check_affinity() to check proposed affinity arm64: Implement task_cpu_possible_mask() arm64: exec: Adjust affinity for compat tasks with mismatched 32-bit EL0 arm64: Prevent offlining first CPU with 32-bit EL0 on mismatched system arm64: Advertise CPUs capable of running 32-bit applications in sysfs arm64: Hook up cmdline parameter to allow mismatched 32-bit EL0 arm64: Remove logic to kill 32-bit tasks on 64-bit-only cores Documentation: arm64: describe asymmetric 32-bit support .../ABI/testing/sysfs-devices-system-cpu | 9 + .../admin-guide/kernel-parameters.txt | 11 + Documentation/arm64/asymmetric-32bit.rst | 155 ++++++++ Documentation/arm64/index.rst | 1 + arch/arm64/include/asm/cpu.h | 44 +-- arch/arm64/include/asm/cpufeature.h | 8 +- arch/arm64/include/asm/elf.h | 6 +- arch/arm64/include/asm/mmu_context.h | 13 + arch/arm64/kernel/cpufeature.c | 232 +++++++++--- arch/arm64/kernel/cpuinfo.c | 53 +-- arch/arm64/kernel/process.c | 44 ++- arch/arm64/kvm/arm.c | 11 +- arch/arm64/tools/cpucaps | 3 +- include/linux/cpuset.h | 8 +- include/linux/mmu_context.h | 14 + include/linux/sched.h | 21 ++ init/init_task.c | 1 + kernel/cgroup/cpuset.c | 59 +-- kernel/fork.c | 2 + kernel/sched/core.c | 340 ++++++++++++++---- kernel/sched/sched.h | 1 + 21 files changed, 841 insertions(+), 195 deletions(-) create mode 100644 Documentation/arm64/asymmetric-32bit.rst -- 2.32.0.rc1.229.g3e70b5a671-goog _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel
next reply other threads:[~2021-06-08 18:03 UTC|newest] Thread overview: 50+ messages / expand[flat|nested] mbox.gz Atom feed top 2021-06-08 18:02 Will Deacon [this message] 2021-06-08 18:02 ` Will Deacon 2021-06-08 18:02 ` [PATCH v9 01/20] arm64: cpuinfo: Split AArch32 registers out into a separate struct Will Deacon 2021-06-08 18:02 ` Will Deacon 2021-06-08 18:02 ` [PATCH v9 02/20] arm64: Allow mismatched 32-bit EL0 support Will Deacon 2021-06-08 18:02 ` Will Deacon 2021-06-08 18:02 ` [PATCH v9 03/20] KVM: arm64: Kill 32-bit vCPUs on systems with mismatched " Will Deacon 2021-06-08 18:02 ` Will Deacon 2021-06-08 18:02 ` [PATCH v9 04/20] arm64: Kill 32-bit applications scheduled on 64-bit-only CPUs Will Deacon 2021-06-08 18:02 ` Will Deacon 2021-06-08 18:02 ` [PATCH v9 05/20] sched: Introduce task_cpu_possible_mask() to limit fallback rq selection Will Deacon 2021-06-08 18:02 ` Will Deacon 2021-06-08 18:02 ` [PATCH v9 06/20] cpuset: Don't use the cpu_possible_mask as a last resort for cgroup v1 Will Deacon 2021-06-08 18:02 ` Will Deacon 2021-06-10 12:59 ` Valentin Schneider 2021-06-10 12:59 ` Valentin Schneider 2021-06-08 18:03 ` [PATCH v9 07/20] cpuset: Honour task_cpu_possible_mask() in guarantee_online_cpus() Will Deacon 2021-06-08 18:03 ` Will Deacon 2021-06-08 18:03 ` [PATCH v9 08/20] cpuset: Cleanup cpuset_cpus_allowed_fallback() use in select_fallback_rq() Will Deacon 2021-06-08 18:03 ` Will Deacon 2021-06-10 12:59 ` Valentin Schneider 2021-06-10 12:59 ` Valentin Schneider 2021-06-08 18:03 ` [PATCH v9 09/20] sched: Reject CPU affinity changes based on task_cpu_possible_mask() Will Deacon 2021-06-08 18:03 ` Will Deacon 2021-06-08 18:03 ` [PATCH v9 10/20] sched: Introduce task_struct::user_cpus_ptr to track requested affinity Will Deacon 2021-06-08 18:03 ` Will Deacon 2021-06-08 18:03 ` [PATCH v9 11/20] sched: Split the guts of sched_setaffinity() into a helper function Will Deacon 2021-06-08 18:03 ` Will Deacon 2021-06-08 18:03 ` [PATCH v9 12/20] sched: Allow task CPU affinity to be restricted on asymmetric systems Will Deacon 2021-06-08 18:03 ` Will Deacon 2021-06-10 13:00 ` Valentin Schneider 2021-06-10 13:00 ` Valentin Schneider 2021-06-08 18:03 ` [PATCH v9 13/20] sched: Introduce dl_task_check_affinity() to check proposed affinity Will Deacon 2021-06-08 18:03 ` Will Deacon 2021-06-08 18:03 ` [PATCH v9 14/20] arm64: Implement task_cpu_possible_mask() Will Deacon 2021-06-08 18:03 ` Will Deacon 2021-06-08 18:03 ` [PATCH v9 15/20] arm64: exec: Adjust affinity for compat tasks with mismatched 32-bit EL0 Will Deacon 2021-06-08 18:03 ` Will Deacon 2021-06-08 18:03 ` [PATCH v9 16/20] arm64: Prevent offlining first CPU with 32-bit EL0 on mismatched system Will Deacon 2021-06-08 18:03 ` Will Deacon 2021-06-08 18:03 ` [PATCH v9 17/20] arm64: Advertise CPUs capable of running 32-bit applications in sysfs Will Deacon 2021-06-08 18:03 ` Will Deacon 2021-06-08 18:03 ` [PATCH v9 18/20] arm64: Hook up cmdline parameter to allow mismatched 32-bit EL0 Will Deacon 2021-06-08 18:03 ` Will Deacon 2021-06-08 18:03 ` [PATCH v9 19/20] arm64: Remove logic to kill 32-bit tasks on 64-bit-only cores Will Deacon 2021-06-08 18:03 ` Will Deacon 2021-06-08 18:03 ` [PATCH v9 20/20] Documentation: arm64: describe asymmetric 32-bit support Will Deacon 2021-06-08 18:03 ` Will Deacon 2021-06-11 16:15 ` [PATCH v9 00/20] Add support for 32-bit tasks on asymmetric AArch32 systems Will Deacon 2021-06-11 16:15 ` Will Deacon
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