diff options
| -rw-r--r-- | Documentation/ABI/testing/sysfs-devices-system-cpu | 3 | ||||
| -rw-r--r-- | arch/powerpc/include/asm/topology.h | 13 | ||||
| -rw-r--r-- | arch/powerpc/kernel/setup-common.c | 1 | ||||
| -rw-r--r-- | arch/powerpc/mm/init-common.c | 4 | ||||
| -rw-r--r-- | arch/powerpc/mm/mem.c | 2 | ||||
| -rw-r--r-- | drivers/soc/fsl/qbman/qman.c | 5 | ||||
| -rw-r--r-- | kernel/cpu.c | 12 |
7 files changed, 29 insertions, 11 deletions
diff --git a/Documentation/ABI/testing/sysfs-devices-system-cpu b/Documentation/ABI/testing/sysfs-devices-system-cpu index 325873385b71..de725ca3be82 100644 --- a/Documentation/ABI/testing/sysfs-devices-system-cpu +++ b/Documentation/ABI/testing/sysfs-devices-system-cpu @@ -562,7 +562,8 @@ Description: Control Symmetric Multi Threading (SMT) ================ ========================================= If control status is "forceoff" or "notsupported" writes - are rejected. + are rejected. Note that enabling SMT on PowerPC skips + offline cores. What: /sys/devices/system/cpu/cpuX/power/energy_perf_bias Date: March 2019 diff --git a/arch/powerpc/include/asm/topology.h b/arch/powerpc/include/asm/topology.h index f4e6f2dd04b7..16bacfe8c7a2 100644 --- a/arch/powerpc/include/asm/topology.h +++ b/arch/powerpc/include/asm/topology.h @@ -145,6 +145,7 @@ static inline int cpu_to_coregroup_id(int cpu) #ifdef CONFIG_HOTPLUG_SMT #include <linux/cpu_smt.h> +#include <linux/cpumask.h> #include <asm/cputhreads.h> static inline bool topology_is_primary_thread(unsigned int cpu) @@ -156,6 +157,18 @@ static inline bool topology_smt_thread_allowed(unsigned int cpu) { return cpu_thread_in_core(cpu) < cpu_smt_num_threads; } + +#define topology_is_core_online topology_is_core_online +static inline bool topology_is_core_online(unsigned int cpu) +{ + int i, first_cpu = cpu_first_thread_sibling(cpu); + + for (i = first_cpu; i < first_cpu + threads_per_core; ++i) { + if (cpu_online(i)) + return true; + } + return false; +} #endif #endif /* __KERNEL__ */ diff --git a/arch/powerpc/kernel/setup-common.c b/arch/powerpc/kernel/setup-common.c index 4bd2f87616ba..943430077375 100644 --- a/arch/powerpc/kernel/setup-common.c +++ b/arch/powerpc/kernel/setup-common.c @@ -959,6 +959,7 @@ void __init setup_arch(char **cmdline_p) mem_topology_setup(); /* Set max_mapnr before paging_init() */ set_max_mapnr(max_pfn); + high_memory = (void *)__va(max_low_pfn * PAGE_SIZE); /* * Release secondary cpus out of their spinloops at 0x60 now that diff --git a/arch/powerpc/mm/init-common.c b/arch/powerpc/mm/init-common.c index 9b4a675eb8f8..2978fcbe307e 100644 --- a/arch/powerpc/mm/init-common.c +++ b/arch/powerpc/mm/init-common.c @@ -73,7 +73,7 @@ void setup_kup(void) #define CTOR(shift) static void ctor_##shift(void *addr) \ { \ - memset(addr, 0, sizeof(void *) << (shift)); \ + memset(addr, 0, sizeof(pgd_t) << (shift)); \ } CTOR(0); CTOR(1); CTOR(2); CTOR(3); CTOR(4); CTOR(5); CTOR(6); CTOR(7); @@ -117,7 +117,7 @@ EXPORT_SYMBOL_GPL(pgtable_cache); /* used by kvm_hv module */ void pgtable_cache_add(unsigned int shift) { char *name; - unsigned long table_size = sizeof(void *) << shift; + unsigned long table_size = sizeof(pgd_t) << shift; unsigned long align = table_size; /* When batching pgtable pointers for RCU freeing, we store diff --git a/arch/powerpc/mm/mem.c b/arch/powerpc/mm/mem.c index d325217ab201..da21cb018984 100644 --- a/arch/powerpc/mm/mem.c +++ b/arch/powerpc/mm/mem.c @@ -290,8 +290,6 @@ void __init mem_init(void) swiotlb_init(ppc_swiotlb_enable, ppc_swiotlb_flags); #endif - high_memory = (void *) __va(max_low_pfn * PAGE_SIZE); - kasan_late_init(); memblock_free_all(); diff --git a/drivers/soc/fsl/qbman/qman.c b/drivers/soc/fsl/qbman/qman.c index 7e9074519ad2..4dc8aba33d9b 100644 --- a/drivers/soc/fsl/qbman/qman.c +++ b/drivers/soc/fsl/qbman/qman.c @@ -2546,11 +2546,6 @@ release_lock: } EXPORT_SYMBOL(qman_delete_cgr); -struct cgr_comp { - struct qman_cgr *cgr; - struct completion completion; -}; - static void qman_delete_cgr_smp_call(void *p) { qman_delete_cgr((struct qman_cgr *)p); diff --git a/kernel/cpu.c b/kernel/cpu.c index 1209ddaec026..b1fd2a3db91a 100644 --- a/kernel/cpu.c +++ b/kernel/cpu.c @@ -2689,6 +2689,16 @@ int cpuhp_smt_disable(enum cpuhp_smt_control ctrlval) return ret; } +/** + * Check if the core a CPU belongs to is online + */ +#if !defined(topology_is_core_online) +static inline bool topology_is_core_online(unsigned int cpu) +{ + return true; +} +#endif + int cpuhp_smt_enable(void) { int cpu, ret = 0; @@ -2699,7 +2709,7 @@ int cpuhp_smt_enable(void) /* Skip online CPUs and CPUs on offline nodes */ if (cpu_online(cpu) || !node_online(cpu_to_node(cpu))) continue; - if (!cpu_smt_thread_allowed(cpu)) + if (!cpu_smt_thread_allowed(cpu) || !topology_is_core_online(cpu)) continue; ret = _cpu_up(cpu, 0, CPUHP_ONLINE); if (ret) |