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| author | Alexander Gordeev <agordeev@linux.ibm.com> | 2020-03-13 16:52:44 +0100 |
|---|---|---|
| committer | Vasily Gorbik <gor@linux.ibm.com> | 2020-03-23 13:41:54 +0100 |
| commit | 959684978d5a8443cfb0ed59a9d1fc59d2a80d09 (patch) | |
| tree | 8e403c87731132d1ad8d5aa3165eede54885d36a /arch/s390 | |
| parent | s390/ipl: add support to control memory clearing for FCP and CCW re-IPL (diff) | |
| download | linux-959684978d5a8443cfb0ed59a9d1fc59d2a80d09.tar.xz linux-959684978d5a8443cfb0ed59a9d1fc59d2a80d09.zip | |
s390/cpuinfo: show number of online cores
Show number of cores that run at least one SMT thread
Signed-off-by: Alexander Gordeev <agordeev@linux.ibm.com>
Reviewed-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Vasily Gorbik <gor@linux.ibm.com>
Diffstat (limited to 'arch/s390')
| -rw-r--r-- | arch/s390/include/asm/topology.h | 3 | ||||
| -rw-r--r-- | arch/s390/kernel/processor.c | 1 | ||||
| -rw-r--r-- | arch/s390/kernel/topology.c | 20 |
3 files changed, 22 insertions, 2 deletions
diff --git a/arch/s390/include/asm/topology.h b/arch/s390/include/asm/topology.h index 56b14616fb6b..fbb507504a3b 100644 --- a/arch/s390/include/asm/topology.h +++ b/arch/s390/include/asm/topology.h @@ -17,6 +17,7 @@ struct cpu_topology_s390 { unsigned short book_id; unsigned short drawer_id; unsigned short dedicated : 1; + int booted_cores; cpumask_t thread_mask; cpumask_t core_mask; cpumask_t book_mask; @@ -35,6 +36,7 @@ extern struct cpu_topology_s390 cpu_topology[NR_CPUS]; #define topology_drawer_id(cpu) (cpu_topology[cpu].drawer_id) #define topology_drawer_cpumask(cpu) (&cpu_topology[cpu].drawer_mask) #define topology_cpu_dedicated(cpu) (cpu_topology[cpu].dedicated) +#define topology_booted_cores(cpu) (cpu_topology[cpu].booted_cores) #define mc_capable() 1 @@ -53,6 +55,7 @@ static inline void topology_init_early(void) { } static inline void topology_schedule_update(void) { } static inline int topology_cpu_init(struct cpu *cpu) { return 0; } static inline int topology_cpu_dedicated(int cpu_nr) { return 0; } +static inline int topology_booted_cores(int cpu_nr) { return 1; } static inline void update_cpu_masks(void) { } static inline void topology_expect_change(void) { } diff --git a/arch/s390/kernel/processor.c b/arch/s390/kernel/processor.c index b98654d0ce41..41172093160e 100644 --- a/arch/s390/kernel/processor.c +++ b/arch/s390/kernel/processor.c @@ -160,6 +160,7 @@ static void show_cpu_topology(struct seq_file *m, unsigned long n) seq_printf(m, "drawer id : %d\n", topology_drawer_id(n)); seq_printf(m, "dedicated : %d\n", topology_cpu_dedicated(n)); seq_printf(m, "address : %d\n", smp_cpu_get_cpu_address(n)); + seq_printf(m, "cpu cores : %d\n", topology_booted_cores(n)); #endif /* CONFIG_SCHED_TOPOLOGY */ } diff --git a/arch/s390/kernel/topology.c b/arch/s390/kernel/topology.c index 09711d55f123..d03edebce754 100644 --- a/arch/s390/kernel/topology.c +++ b/arch/s390/kernel/topology.c @@ -245,8 +245,8 @@ int topology_set_cpu_management(int fc) void update_cpu_masks(void) { - struct cpu_topology_s390 *topo; - int cpu, id; + struct cpu_topology_s390 *topo, *topo_package, *topo_sibling; + int cpu, sibling, pkg_first, smt_first, id; for_each_possible_cpu(cpu) { topo = &cpu_topology[cpu]; @@ -254,6 +254,7 @@ void update_cpu_masks(void) topo->core_mask = cpu_group_map(&socket_info, cpu); topo->book_mask = cpu_group_map(&book_info, cpu); topo->drawer_mask = cpu_group_map(&drawer_info, cpu); + topo->booted_cores = 0; if (topology_mode != TOPOLOGY_MODE_HW) { id = topology_mode == TOPOLOGY_MODE_PACKAGE ? 0 : cpu; topo->thread_id = cpu; @@ -263,6 +264,21 @@ void update_cpu_masks(void) topo->drawer_id = id; } } + for_each_online_cpu(cpu) { + topo = &cpu_topology[cpu]; + pkg_first = cpumask_first(&topo->core_mask); + topo_package = &cpu_topology[pkg_first]; + if (cpu == pkg_first) { + for_each_cpu(sibling, &topo->core_mask) { + topo_sibling = &cpu_topology[sibling]; + smt_first = cpumask_first(&topo_sibling->thread_mask); + if (sibling == smt_first) + topo_package->booted_cores++; + } + } else { + topo->booted_cores = topo_package->booted_cores; + } + } } void store_topology(struct sysinfo_15_1_x *info) |