diff options
Diffstat (limited to 'arch/s390/kernel')
| -rw-r--r-- | arch/s390/kernel/crash_dump.c | 3 | ||||
| -rw-r--r-- | arch/s390/kernel/irq.c | 1 | ||||
| -rw-r--r-- | arch/s390/kernel/perf_cpum_cf_diag.c | 19 | ||||
| -rw-r--r-- | arch/s390/kernel/setup.c | 16 | ||||
| -rw-r--r-- | arch/s390/kernel/smp.c | 12 | ||||
| -rw-r--r-- | arch/s390/kernel/topology.c | 6 | ||||
| -rw-r--r-- | arch/s390/kernel/vtime.c | 19 |
7 files changed, 61 insertions, 15 deletions
diff --git a/arch/s390/kernel/crash_dump.c b/arch/s390/kernel/crash_dump.c index 97eae3871868..f96a5857bbfd 100644 --- a/arch/s390/kernel/crash_dump.c +++ b/arch/s390/kernel/crash_dump.c @@ -61,6 +61,9 @@ struct save_area * __init save_area_alloc(bool is_boot_cpu) struct save_area *sa; sa = (void *) memblock_phys_alloc(sizeof(*sa), 8); + if (!sa) + panic("Failed to allocate save area\n"); + if (is_boot_cpu) list_add(&sa->list, &dump_save_areas); else diff --git a/arch/s390/kernel/irq.c b/arch/s390/kernel/irq.c index 0e8d68bac82c..0cd5a5f96729 100644 --- a/arch/s390/kernel/irq.c +++ b/arch/s390/kernel/irq.c @@ -88,6 +88,7 @@ static const struct irq_class irqclass_sub_desc[] = { {.irq = IRQIO_MSI, .name = "MSI", .desc = "[I/O] MSI Interrupt" }, {.irq = IRQIO_VIR, .name = "VIR", .desc = "[I/O] Virtual I/O Devices"}, {.irq = IRQIO_VAI, .name = "VAI", .desc = "[I/O] Virtual I/O Devices AI"}, + {.irq = IRQIO_GAL, .name = "GAL", .desc = "[I/O] GIB Alert"}, {.irq = NMI_NMI, .name = "NMI", .desc = "[NMI] Machine Check"}, {.irq = CPU_RST, .name = "RST", .desc = "[CPU] CPU Restart"}, }; diff --git a/arch/s390/kernel/perf_cpum_cf_diag.c b/arch/s390/kernel/perf_cpum_cf_diag.c index c6fad208c2fa..b6854812d2ed 100644 --- a/arch/s390/kernel/perf_cpum_cf_diag.c +++ b/arch/s390/kernel/perf_cpum_cf_diag.c @@ -196,23 +196,30 @@ static void cf_diag_perf_event_destroy(struct perf_event *event) */ static int __hw_perf_event_init(struct perf_event *event) { - struct cpu_cf_events *cpuhw = this_cpu_ptr(&cpu_cf_events); struct perf_event_attr *attr = &event->attr; + struct cpu_cf_events *cpuhw; enum cpumf_ctr_set i; int err = 0; - debug_sprintf_event(cf_diag_dbg, 5, - "%s event %p cpu %d authorized %#x\n", __func__, - event, event->cpu, cpuhw->info.auth_ctl); + debug_sprintf_event(cf_diag_dbg, 5, "%s event %p cpu %d\n", __func__, + event, event->cpu); event->hw.config = attr->config; event->hw.config_base = 0; - local64_set(&event->count, 0); - /* Add all authorized counter sets to config_base */ + /* Add all authorized counter sets to config_base. The + * the hardware init function is either called per-cpu or just once + * for all CPUS (event->cpu == -1). This depends on the whether + * counting is started for all CPUs or on a per workload base where + * the perf event moves from one CPU to another CPU. + * Checking the authorization on any CPU is fine as the hardware + * applies the same authorization settings to all CPUs. + */ + cpuhw = &get_cpu_var(cpu_cf_events); for (i = CPUMF_CTR_SET_BASIC; i < CPUMF_CTR_SET_MAX; ++i) if (cpuhw->info.auth_ctl & cpumf_ctr_ctl[i]) event->hw.config_base |= cpumf_ctr_ctl[i]; + put_cpu_var(cpu_cf_events); /* No authorized counter sets, nothing to count/sample */ if (!event->hw.config_base) { diff --git a/arch/s390/kernel/setup.c b/arch/s390/kernel/setup.c index 12934e8fbb91..2c642af526ce 100644 --- a/arch/s390/kernel/setup.c +++ b/arch/s390/kernel/setup.c @@ -378,6 +378,10 @@ static void __init setup_lowcore_dat_off(void) */ BUILD_BUG_ON(sizeof(struct lowcore) != LC_PAGES * PAGE_SIZE); lc = memblock_alloc_low(sizeof(*lc), sizeof(*lc)); + if (!lc) + panic("%s: Failed to allocate %zu bytes align=%zx\n", + __func__, sizeof(*lc), sizeof(*lc)); + lc->restart_psw.mask = PSW_KERNEL_BITS; lc->restart_psw.addr = (unsigned long) restart_int_handler; lc->external_new_psw.mask = PSW_KERNEL_BITS | PSW_MASK_MCHECK; @@ -419,6 +423,9 @@ static void __init setup_lowcore_dat_off(void) * all CPUs in cast *one* of them does a PSW restart. */ restart_stack = memblock_alloc(THREAD_SIZE, THREAD_SIZE); + if (!restart_stack) + panic("%s: Failed to allocate %lu bytes align=0x%lx\n", + __func__, THREAD_SIZE, THREAD_SIZE); restart_stack += STACK_INIT_OFFSET; /* @@ -495,6 +502,9 @@ static void __init setup_resources(void) for_each_memblock(memory, reg) { res = memblock_alloc(sizeof(*res), 8); + if (!res) + panic("%s: Failed to allocate %zu bytes align=0x%x\n", + __func__, sizeof(*res), 8); res->flags = IORESOURCE_BUSY | IORESOURCE_SYSTEM_RAM; res->name = "System RAM"; @@ -509,6 +519,9 @@ static void __init setup_resources(void) continue; if (std_res->end > res->end) { sub_res = memblock_alloc(sizeof(*sub_res), 8); + if (!sub_res) + panic("%s: Failed to allocate %zu bytes align=0x%x\n", + __func__, sizeof(*sub_res), 8); *sub_res = *std_res; sub_res->end = res->end; std_res->start = res->end + 1; @@ -966,6 +979,9 @@ static void __init setup_randomness(void) vmms = (struct sysinfo_3_2_2 *) memblock_phys_alloc(PAGE_SIZE, PAGE_SIZE); + if (!vmms) + panic("Failed to allocate memory for sysinfo structure\n"); + if (stsi(vmms, 3, 2, 2) == 0 && vmms->count) add_device_randomness(&vmms->vm, sizeof(vmms->vm[0]) * vmms->count); memblock_free((unsigned long) vmms, PAGE_SIZE); diff --git a/arch/s390/kernel/smp.c b/arch/s390/kernel/smp.c index b198ece2aad6..bd197baf1dc3 100644 --- a/arch/s390/kernel/smp.c +++ b/arch/s390/kernel/smp.c @@ -266,7 +266,8 @@ static void pcpu_prepare_secondary(struct pcpu *pcpu, int cpu) lc->percpu_offset = __per_cpu_offset[cpu]; lc->kernel_asce = S390_lowcore.kernel_asce; lc->machine_flags = S390_lowcore.machine_flags; - lc->user_timer = lc->system_timer = lc->steal_timer = 0; + lc->user_timer = lc->system_timer = + lc->steal_timer = lc->avg_steal_timer = 0; __ctl_store(lc->cregs_save_area, 0, 15); save_access_regs((unsigned int *) lc->access_regs_save_area); memcpy(lc->stfle_fac_list, S390_lowcore.stfle_fac_list, @@ -656,7 +657,11 @@ void __init smp_save_dump_cpus(void) /* No previous system present, normal boot. */ return; /* Allocate a page as dumping area for the store status sigps */ - page = memblock_alloc_base(PAGE_SIZE, PAGE_SIZE, 1UL << 31); + page = memblock_phys_alloc_range(PAGE_SIZE, PAGE_SIZE, 0, 1UL << 31); + if (!page) + panic("ERROR: Failed to allocate %lx bytes below %lx\n", + PAGE_SIZE, 1UL << 31); + /* Set multi-threading state to the previous system. */ pcpu_set_smt(sclp.mtid_prev); boot_cpu_addr = stap(); @@ -766,6 +771,9 @@ void __init smp_detect_cpus(void) /* Get CPU information */ info = memblock_alloc(sizeof(*info), 8); + if (!info) + panic("%s: Failed to allocate %zu bytes align=0x%x\n", + __func__, sizeof(*info), 8); smp_get_core_info(info, 1); /* Find boot CPU type */ if (sclp.has_core_type) { diff --git a/arch/s390/kernel/topology.c b/arch/s390/kernel/topology.c index 8992b04c0ade..8964a3f60aad 100644 --- a/arch/s390/kernel/topology.c +++ b/arch/s390/kernel/topology.c @@ -520,6 +520,9 @@ static void __init alloc_masks(struct sysinfo_15_1_x *info, nr_masks = max(nr_masks, 1); for (i = 0; i < nr_masks; i++) { mask->next = memblock_alloc(sizeof(*mask->next), 8); + if (!mask->next) + panic("%s: Failed to allocate %zu bytes align=0x%x\n", + __func__, sizeof(*mask->next), 8); mask = mask->next; } } @@ -538,6 +541,9 @@ void __init topology_init_early(void) if (!MACHINE_HAS_TOPOLOGY) goto out; tl_info = memblock_alloc(PAGE_SIZE, PAGE_SIZE); + if (!tl_info) + panic("%s: Failed to allocate %lu bytes align=0x%lx\n", + __func__, PAGE_SIZE, PAGE_SIZE); info = tl_info; store_topology(info); pr_info("The CPU configuration topology of the machine is: %d %d %d %d %d %d / %d\n", diff --git a/arch/s390/kernel/vtime.c b/arch/s390/kernel/vtime.c index 98f850e00008..a69a0911ed0e 100644 --- a/arch/s390/kernel/vtime.c +++ b/arch/s390/kernel/vtime.c @@ -124,7 +124,7 @@ static void account_system_index_scaled(struct task_struct *p, u64 cputime, */ static int do_account_vtime(struct task_struct *tsk) { - u64 timer, clock, user, guest, system, hardirq, softirq, steal; + u64 timer, clock, user, guest, system, hardirq, softirq; timer = S390_lowcore.last_update_timer; clock = S390_lowcore.last_update_clock; @@ -182,12 +182,6 @@ static int do_account_vtime(struct task_struct *tsk) if (softirq) account_system_index_scaled(tsk, softirq, CPUTIME_SOFTIRQ); - steal = S390_lowcore.steal_timer; - if ((s64) steal > 0) { - S390_lowcore.steal_timer = 0; - account_steal_time(cputime_to_nsecs(steal)); - } - return virt_timer_forward(user + guest + system + hardirq + softirq); } @@ -213,8 +207,19 @@ void vtime_task_switch(struct task_struct *prev) */ void vtime_flush(struct task_struct *tsk) { + u64 steal, avg_steal; + if (do_account_vtime(tsk)) virt_timer_expire(); + + steal = S390_lowcore.steal_timer; + avg_steal = S390_lowcore.avg_steal_timer / 2; + if ((s64) steal > 0) { + S390_lowcore.steal_timer = 0; + account_steal_time(steal); + avg_steal += steal; + } + S390_lowcore.avg_steal_timer = avg_steal; } /* |