Re: [PATCH v6 04/21] arm64: Kill 32-bit applications scheduled on 64-bit-only CPUs

[PATCH v6 00/21] Add support for 32-bit tasks on asymmetric AArch32 systems · Will Deacon <will@kernel.org> · 2021-05-18
[PATCH v6 01/21] arm64: cpuinfo: Split AArch32 registers out into a separate struct · Will Deacon <will@kernel.org> · 2021-05-18
Re: [PATCH v6 01/21] arm64: cpuinfo: Split AArch32 registers out into a separate struct · Catalin Marinas <catalin.marinas@arm.com> · 2021-05-21
[PATCH v6 02/21] arm64: Allow mismatched 32-bit EL0 support · Will Deacon <will@kernel.org> · 2021-05-18
Re: [PATCH v6 02/21] arm64: Allow mismatched 32-bit EL0 support · Catalin Marinas <catalin.marinas@arm.com> · 2021-05-21
Re: [PATCH v6 02/21] arm64: Allow mismatched 32-bit EL0 support · Will Deacon <will@kernel.org> · 2021-05-24
Re: [PATCH v6 02/21] arm64: Allow mismatched 32-bit EL0 support · Catalin Marinas <catalin.marinas@arm.com> · 2021-05-24
Re: [PATCH v6 02/21] arm64: Allow mismatched 32-bit EL0 support · Catalin Marinas <catalin.marinas@arm.com> · 2021-05-21
Re: [PATCH v6 02/21] arm64: Allow mismatched 32-bit EL0 support · Will Deacon <will@kernel.org> · 2021-05-24
Re: [PATCH v6 02/21] arm64: Allow mismatched 32-bit EL0 support · Catalin Marinas <catalin.marinas@arm.com> · 2021-05-24
Re: [PATCH v6 02/21] arm64: Allow mismatched 32-bit EL0 support · Qais Yousef <hidden> · 2021-05-21
Re: [PATCH v6 02/21] arm64: Allow mismatched 32-bit EL0 support · Will Deacon <will@kernel.org> · 2021-05-24
[PATCH v6 03/21] KVM: arm64: Kill 32-bit vCPUs on systems with mismatched EL0 support · Will Deacon <will@kernel.org> · 2021-05-18
Re: [PATCH v6 03/21] KVM: arm64: Kill 32-bit vCPUs on systems with mismatched EL0 support · Catalin Marinas <catalin.marinas@arm.com> · 2021-05-21
[PATCH v6 04/21] arm64: Kill 32-bit applications scheduled on 64-bit-only CPUs · Will Deacon <will@kernel.org> · 2021-05-18
Re: [PATCH v6 04/21] arm64: Kill 32-bit applications scheduled on 64-bit-only CPUs · Catalin Marinas <catalin.marinas@arm.com> · 2021-05-21
[PATCH v6 05/21] arm64: Advertise CPUs capable of running 32-bit applications in sysfs · Will Deacon <will@kernel.org> · 2021-05-18
Re: [PATCH v6 05/21] arm64: Advertise CPUs capable of running 32-bit applications in sysfs · Catalin Marinas <catalin.marinas@arm.com> · 2021-05-21
[PATCH v6 06/21] sched: Introduce task_cpu_possible_mask() to limit fallback rq selection · Will Deacon <will@kernel.org> · 2021-05-18
Re: [PATCH v6 06/21] sched: Introduce task_cpu_possible_mask() to limit fallback rq selection · Peter Zijlstra <peterz@infradead.org> · 2021-05-21
Re: [PATCH v6 06/21] sched: Introduce task_cpu_possible_mask() to limit fallback rq selection · Will Deacon <will@kernel.org> · 2021-05-24
[PATCH v6 07/21] cpuset: Don't use the cpu_possible_mask as a last resort for cgroup v1 · Will Deacon <will@kernel.org> · 2021-05-18
Re: [PATCH v6 07/21] cpuset: Don't use the cpu_possible_mask as a last resort for cgroup v1 · Qais Yousef <hidden> · 2021-05-21
Re: [PATCH v6 07/21] cpuset: Don't use the cpu_possible_mask as a last resort for cgroup v1 · Will Deacon <will@kernel.org> · 2021-05-24
[PATCH v6 08/21] cpuset: Honour task_cpu_possible_mask() in guarantee_online_cpus() · Will Deacon <will@kernel.org> · 2021-05-18
Re: [PATCH v6 08/21] cpuset: Honour task_cpu_possible_mask() in guarantee_online_cpus() · Qais Yousef <hidden> · 2021-05-21
Re: [PATCH v6 08/21] cpuset: Honour task_cpu_possible_mask() in guarantee_online_cpus() · Will Deacon <will@kernel.org> · 2021-05-24
[PATCH v6 09/21] sched: Reject CPU affinity changes based on task_cpu_possible_mask() · Will Deacon <will@kernel.org> · 2021-05-18
[PATCH v6 10/21] sched: Introduce task_struct::user_cpus_ptr to track requested affinity · Will Deacon <will@kernel.org> · 2021-05-18
[PATCH v6 11/21] sched: Split the guts of sched_setaffinity() into a helper function · Will Deacon <will@kernel.org> · 2021-05-18
Re: [PATCH v6 11/21] sched: Split the guts of sched_setaffinity() into a helper function · Qais Yousef <hidden> · 2021-05-21
Re: [PATCH v6 11/21] sched: Split the guts of sched_setaffinity() into a helper function · Will Deacon <will@kernel.org> · 2021-05-24
[PATCH v6 12/21] sched: Allow task CPU affinity to be restricted on asymmetric systems · Will Deacon <will@kernel.org> · 2021-05-18
Re: [PATCH v6 12/21] sched: Allow task CPU affinity to be restricted on asymmetric systems · Qais Yousef <hidden> · 2021-05-21
Re: [PATCH v6 12/21] sched: Allow task CPU affinity to be restricted on asymmetric systems · Will Deacon <will@kernel.org> · 2021-05-24
[PATCH v6 13/21] sched: Admit forcefully-affined tasks into SCHED_DEADLINE · Will Deacon <will@kernel.org> · 2021-05-18
Re: [PATCH v6 13/21] sched: Admit forcefully-affined tasks into SCHED_DEADLINE · Quentin Perret <hidden> · 2021-05-18
Re: [PATCH v6 13/21] sched: Admit forcefully-affined tasks into SCHED_DEADLINE · Will Deacon <will@kernel.org> · 2021-05-18
Re: [PATCH v6 13/21] sched: Admit forcefully-affined tasks into SCHED_DEADLINE · Quentin Perret <hidden> · 2021-05-18
Re: [PATCH v6 13/21] sched: Admit forcefully-affined tasks into SCHED_DEADLINE · Will Deacon <will@kernel.org> · 2021-05-18
Re: [PATCH v6 13/21] sched: Admit forcefully-affined tasks into SCHED_DEADLINE · Quentin Perret <hidden> · 2021-05-18
Re: [PATCH v6 13/21] sched: Admit forcefully-affined tasks into SCHED_DEADLINE · Juri Lelli <juri.lelli@redhat.com> · 2021-05-20
Re: [PATCH v6 13/21] sched: Admit forcefully-affined tasks into SCHED_DEADLINE · Will Deacon <will@kernel.org> · 2021-05-20
Re: [PATCH v6 13/21] sched: Admit forcefully-affined tasks into SCHED_DEADLINE · Quentin Perret <hidden> · 2021-05-20
Re: [PATCH v6 13/21] sched: Admit forcefully-affined tasks into SCHED_DEADLINE · Juri Lelli <juri.lelli@redhat.com> · 2021-05-20
Re: [PATCH v6 13/21] sched: Admit forcefully-affined tasks into SCHED_DEADLINE · Daniel Bristot de Oliveira <hidden> · 2021-05-20
Re: [PATCH v6 13/21] sched: Admit forcefully-affined tasks into SCHED_DEADLINE · Dietmar Eggemann <dietmar.eggemann@arm.com> · 2021-05-20
Re: [PATCH v6 13/21] sched: Admit forcefully-affined tasks into SCHED_DEADLINE · Daniel Bristot de Oliveira <hidden> · 2021-05-20
Re: [PATCH v6 13/21] sched: Admit forcefully-affined tasks into SCHED_DEADLINE · Dietmar Eggemann <dietmar.eggemann@arm.com> · 2021-05-20
Re: [PATCH v6 13/21] sched: Admit forcefully-affined tasks into SCHED_DEADLINE · Will Deacon <will@kernel.org> · 2021-05-20
Re: [PATCH v6 13/21] sched: Admit forcefully-affined tasks into SCHED_DEADLINE · Dietmar Eggemann <dietmar.eggemann@arm.com> · 2021-05-21
Re: [PATCH v6 13/21] sched: Admit forcefully-affined tasks into SCHED_DEADLINE · Will Deacon <will@kernel.org> · 2021-05-20
Re: [PATCH v6 13/21] sched: Admit forcefully-affined tasks into SCHED_DEADLINE · Juri Lelli <juri.lelli@redhat.com> · 2021-05-21
Re: [PATCH v6 13/21] sched: Admit forcefully-affined tasks into SCHED_DEADLINE · Quentin Perret <hidden> · 2021-05-21
Re: [PATCH v6 13/21] sched: Admit forcefully-affined tasks into SCHED_DEADLINE · Juri Lelli <juri.lelli@redhat.com> · 2021-05-21
Re: [PATCH v6 13/21] sched: Admit forcefully-affined tasks into SCHED_DEADLINE · Will Deacon <will@kernel.org> · 2021-05-21
Re: [PATCH v6 13/21] sched: Admit forcefully-affined tasks into SCHED_DEADLINE · Dietmar Eggemann <dietmar.eggemann@arm.com> · 2021-05-21
Re: [PATCH v6 13/21] sched: Admit forcefully-affined tasks into SCHED_DEADLINE · Quentin Perret <hidden> · 2021-05-21
Re: [PATCH v6 13/21] sched: Admit forcefully-affined tasks into SCHED_DEADLINE · Juri Lelli <juri.lelli@redhat.com> · 2021-05-21
Re: [PATCH v6 13/21] sched: Admit forcefully-affined tasks into SCHED_DEADLINE · Dietmar Eggemann <dietmar.eggemann@arm.com> · 2021-05-21
Re: [PATCH v6 13/21] sched: Admit forcefully-affined tasks into SCHED_DEADLINE · Daniel Bristot de Oliveira <hidden> · 2021-05-21
Re: [PATCH v6 13/21] sched: Admit forcefully-affined tasks into SCHED_DEADLINE · Quentin Perret <hidden> · 2021-05-21
Re: [PATCH v6 13/21] sched: Admit forcefully-affined tasks into SCHED_DEADLINE · Will Deacon <will@kernel.org> · 2021-05-24
[PATCH v6 14/21] freezer: Add frozen_or_skipped() helper function · Will Deacon <will@kernel.org> · 2021-05-18
[PATCH v6 16/21] arm64: Implement task_cpu_possible_mask() · Will Deacon <will@kernel.org> · 2021-05-18
Re: [PATCH v6 16/21] arm64: Implement task_cpu_possible_mask() · Catalin Marinas <catalin.marinas@arm.com> · 2021-05-24
[PATCH v6 15/21] sched: Defer wakeup in ttwu() for unschedulable frozen tasks · Will Deacon <will@kernel.org> · 2021-05-18
[PATCH v6 17/21] arm64: exec: Adjust affinity for compat tasks with mismatched 32-bit EL0 · Will Deacon <will@kernel.org> · 2021-05-18
Re: [PATCH v6 17/21] arm64: exec: Adjust affinity for compat tasks with mismatched 32-bit EL0 · Catalin Marinas <catalin.marinas@arm.com> · 2021-05-24
[PATCH v6 18/21] arm64: Prevent offlining first CPU with 32-bit EL0 on mismatched system · Will Deacon <will@kernel.org> · 2021-05-18
Re: [PATCH v6 18/21] arm64: Prevent offlining first CPU with 32-bit EL0 on mismatched system · Catalin Marinas <catalin.marinas@arm.com> · 2021-05-24
Re: [PATCH v6 18/21] arm64: Prevent offlining first CPU with 32-bit EL0 on mismatched system · Will Deacon <will@kernel.org> · 2021-05-24
Re: [PATCH v6 18/21] arm64: Prevent offlining first CPU with 32-bit EL0 on mismatched system · Catalin Marinas <catalin.marinas@arm.com> · 2021-05-25
[PATCH v6 19/21] arm64: Hook up cmdline parameter to allow mismatched 32-bit EL0 · Will Deacon <will@kernel.org> · 2021-05-18
Re: [PATCH v6 19/21] arm64: Hook up cmdline parameter to allow mismatched 32-bit EL0 · Catalin Marinas <catalin.marinas@arm.com> · 2021-05-24
[PATCH v6 20/21] arm64: Remove logic to kill 32-bit tasks on 64-bit-only cores · Will Deacon <will@kernel.org> · 2021-05-18
Re: [PATCH v6 20/21] arm64: Remove logic to kill 32-bit tasks on 64-bit-only cores · Catalin Marinas <catalin.marinas@arm.com> · 2021-05-24
[PATCH v6 21/21] Documentation: arm64: describe asymmetric 32-bit support · Will Deacon <will@kernel.org> · 2021-05-18
Re: [PATCH v6 21/21] Documentation: arm64: describe asymmetric 32-bit support · Qais Yousef <hidden> · 2021-05-21
Re: [PATCH v6 21/21] Documentation: arm64: describe asymmetric 32-bit support · Will Deacon <will@kernel.org> · 2021-05-24
Re: [PATCH v6 21/21] Documentation: arm64: describe asymmetric 32-bit support · Catalin Marinas <catalin.marinas@arm.com> · 2021-05-24
Re: [PATCH v6 00/21] Add support for 32-bit tasks on asymmetric AArch32 systems · Qais Yousef <hidden> · 2021-05-21
Re: [PATCH v6 00/21] Add support for 32-bit tasks on asymmetric AArch32 systems · Will Deacon <will@kernel.org> · 2021-05-24

From: Catalin Marinas <catalin.marinas@arm.com>
Date: 2021-05-21 10:55:45
Also in: linux-arm-kernel, lkml

On Tue, May 18, 2021 at 10:47:08AM +0100, Will Deacon wrote:

Scheduling a 32-bit application on a 64-bit-only CPU is a bad idea.

Ensure that 32-bit applications always take the slow-path when returning
to userspace on a system with mismatched support at EL0, so that we can
avoid trying to run on a 64-bit-only CPU and force a SIGKILL instead.

Signed-off-by: Will Deacon <will@kernel.org>

Reviewed-by: Catalin Marinas <catalin.marinas@arm.com>

`h`	back out one level
`j`	next message in thread
`k`	previous message in thread
`l`	drill in
`Esc`	close help / fold thread tree
`?`	toggle this help