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Asymmetric CPU capacity can not necessarily be determined accurately at the time the initial sched_domain hierarchy is built during boot. It is therefore necessary to be able to force a full rebuild of the hierarchy later triggered by the arch_topology driver. A full rebuild requires the arch-code to implement arch_update_cpu_topology() which isn't yet implemented for arm. This patch points the arm implementation to arch_topology driver to ensure that full hierarchy rebuild happens when needed. Signed-off-by: Morten Rasmussen <morten.rasmussen@arm.com> Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Russell King <linux@armlinux.org.uk> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: dietmar.eggemann@arm.com Cc: valentin.schneider@arm.com Cc: vincent.guittot@linaro.org Link: http://lkml.kernel.org/r/1532093554-30504-5-git-send-email-morten.rasmussen@arm.com Signed-off-by: Ingo Molnar <mingo@kernel.org>
48 lines
1.3 KiB
C
48 lines
1.3 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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#ifndef _ASM_ARM_TOPOLOGY_H
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#define _ASM_ARM_TOPOLOGY_H
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#ifdef CONFIG_ARM_CPU_TOPOLOGY
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#include <linux/cpumask.h>
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struct cputopo_arm {
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int thread_id;
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int core_id;
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int socket_id;
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cpumask_t thread_sibling;
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cpumask_t core_sibling;
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};
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extern struct cputopo_arm cpu_topology[NR_CPUS];
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#define topology_physical_package_id(cpu) (cpu_topology[cpu].socket_id)
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#define topology_core_id(cpu) (cpu_topology[cpu].core_id)
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#define topology_core_cpumask(cpu) (&cpu_topology[cpu].core_sibling)
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#define topology_sibling_cpumask(cpu) (&cpu_topology[cpu].thread_sibling)
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void init_cpu_topology(void);
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void store_cpu_topology(unsigned int cpuid);
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const struct cpumask *cpu_coregroup_mask(int cpu);
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#include <linux/arch_topology.h>
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/* Replace task scheduler's default frequency-invariant accounting */
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#define arch_scale_freq_capacity topology_get_freq_scale
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/* Replace task scheduler's default cpu-invariant accounting */
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#define arch_scale_cpu_capacity topology_get_cpu_scale
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/* Enable topology flag updates */
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#define arch_update_cpu_topology topology_update_cpu_topology
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#else
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static inline void init_cpu_topology(void) { }
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static inline void store_cpu_topology(unsigned int cpuid) { }
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#endif
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#include <asm-generic/topology.h>
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#endif /* _ASM_ARM_TOPOLOGY_H */
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