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https://github.com/AuxXxilium/linux_dsm_epyc7002.git
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da0c636ea7
Convert the per cpu topology cpu masks to a per cpu variable. At least for machines which do have less possible cpus than NR_CPUS this can save a bit of memory (z/VM: max 64 vs 512 for performance_defconfig). This reduces the kernel image size by 100k. Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
57 lines
1.6 KiB
C
57 lines
1.6 KiB
C
#ifndef _ASM_S390_TOPOLOGY_H
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#define _ASM_S390_TOPOLOGY_H
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#include <linux/cpumask.h>
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struct sysinfo_15_1_x;
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struct cpu;
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#ifdef CONFIG_SCHED_BOOK
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struct cpu_topology_s390 {
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unsigned short thread_id;
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unsigned short core_id;
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unsigned short socket_id;
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unsigned short book_id;
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cpumask_t thread_mask;
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cpumask_t core_mask;
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cpumask_t book_mask;
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};
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DECLARE_PER_CPU(struct cpu_topology_s390, cpu_topology);
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#define topology_physical_package_id(cpu) (per_cpu(cpu_topology, cpu).socket_id)
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#define topology_thread_id(cpu) (per_cpu(cpu_topology, cpu).thread_id)
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#define topology_thread_cpumask(cpu) (&per_cpu(cpu_topology, cpu).thread_mask)
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#define topology_core_id(cpu) (per_cpu(cpu_topology, cpu).core_id)
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#define topology_core_cpumask(cpu) (&per_cpu(cpu_topology, cpu).core_mask)
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#define topology_book_id(cpu) (per_cpu(cpu_topology, cpu).book_id)
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#define topology_book_cpumask(cpu) (&per_cpu(cpu_topology, cpu).book_mask)
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#define mc_capable() 1
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int topology_cpu_init(struct cpu *);
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int topology_set_cpu_management(int fc);
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void topology_schedule_update(void);
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void store_topology(struct sysinfo_15_1_x *info);
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void topology_expect_change(void);
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const struct cpumask *cpu_coregroup_mask(int cpu);
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#else /* CONFIG_SCHED_BOOK */
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static inline void topology_schedule_update(void) { }
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static inline int topology_cpu_init(struct cpu *cpu) { return 0; }
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static inline void topology_expect_change(void) { }
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#endif /* CONFIG_SCHED_BOOK */
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#define POLARIZATION_UNKNOWN (-1)
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#define POLARIZATION_HRZ (0)
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#define POLARIZATION_VL (1)
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#define POLARIZATION_VM (2)
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#define POLARIZATION_VH (3)
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#include <asm-generic/topology.h>
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#endif /* _ASM_S390_TOPOLOGY_H */
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