diff --git a/arch/powerpc/Kbuild b/arch/powerpc/Kbuild index 22cd0d55a8924..571f260b08423 100644 --- a/arch/powerpc/Kbuild +++ b/arch/powerpc/Kbuild @@ -1,5 +1,6 @@ # SPDX-License-Identifier: GPL-2.0 -subdir-ccflags-$(CONFIG_PPC_WERROR) := -Werror +subdir-ccflags-$(CONFIG_PPC_WERROR) := -Werror -Wa,--fatal-warnings +subdir-asflags-$(CONFIG_PPC_WERROR) := -Wa,--fatal-warnings obj-y += kernel/ obj-y += mm/ diff --git a/arch/powerpc/include/asm/cpu_has_feature.h b/arch/powerpc/include/asm/cpu_has_feature.h index 727d4b3219379..0efabccd820cf 100644 --- a/arch/powerpc/include/asm/cpu_has_feature.h +++ b/arch/powerpc/include/asm/cpu_has_feature.h @@ -29,7 +29,7 @@ static __always_inline bool cpu_has_feature(unsigned long feature) #endif #ifdef CONFIG_JUMP_LABEL_FEATURE_CHECK_DEBUG - if (!static_key_initialized) { + if (!static_key_feature_checks_initialized) { printk("Warning! cpu_has_feature() used prior to jump label init!\n"); dump_stack(); return early_cpu_has_feature(feature); diff --git a/arch/powerpc/include/asm/feature-fixups.h b/arch/powerpc/include/asm/feature-fixups.h index 77824bd289a38..17d168dd8b491 100644 --- a/arch/powerpc/include/asm/feature-fixups.h +++ b/arch/powerpc/include/asm/feature-fixups.h @@ -291,6 +291,8 @@ extern long __start___rfi_flush_fixup, __stop___rfi_flush_fixup; extern long __start___barrier_nospec_fixup, __stop___barrier_nospec_fixup; extern long __start__btb_flush_fixup, __stop__btb_flush_fixup; +extern bool static_key_feature_checks_initialized; + void apply_feature_fixups(void); void update_mmu_feature_fixups(unsigned long mask); void setup_feature_keys(void); diff --git a/arch/powerpc/include/asm/interrupt.h b/arch/powerpc/include/asm/interrupt.h index 7b610864b3645..2d6c886b40f44 100644 --- a/arch/powerpc/include/asm/interrupt.h +++ b/arch/powerpc/include/asm/interrupt.h @@ -336,6 +336,14 @@ static inline void interrupt_nmi_enter_prepare(struct pt_regs *regs, struct inte if (IS_ENABLED(CONFIG_KASAN)) return; + /* + * Likewise, do not use it in real mode if percpu first chunk is not + * embedded. With CONFIG_NEED_PER_CPU_PAGE_FIRST_CHUNK enabled there + * are chances where percpu allocation can come from vmalloc area. + */ + if (percpu_first_chunk_is_paged) + return; + /* Otherwise, it should be safe to call it */ nmi_enter(); } @@ -351,6 +359,8 @@ static inline void interrupt_nmi_exit_prepare(struct pt_regs *regs, struct inter // no nmi_exit for a pseries hash guest taking a real mode exception } else if (IS_ENABLED(CONFIG_KASAN)) { // no nmi_exit for KASAN in real mode + } else if (percpu_first_chunk_is_paged) { + // no nmi_exit if percpu first chunk is not embedded } else { nmi_exit(); } diff --git a/arch/powerpc/include/asm/mmu.h b/arch/powerpc/include/asm/mmu.h index 3b72c7ed24cfd..24f830cf9bb45 100644 --- a/arch/powerpc/include/asm/mmu.h +++ b/arch/powerpc/include/asm/mmu.h @@ -251,7 +251,7 @@ static __always_inline bool mmu_has_feature(unsigned long feature) #endif #ifdef CONFIG_JUMP_LABEL_FEATURE_CHECK_DEBUG - if (!static_key_initialized) { + if (!static_key_feature_checks_initialized) { printk("Warning! mmu_has_feature() used prior to jump label init!\n"); dump_stack(); return early_mmu_has_feature(feature); diff --git a/arch/powerpc/include/asm/percpu.h b/arch/powerpc/include/asm/percpu.h index 8e5b7d0b851c6..634970ce13c6b 100644 --- a/arch/powerpc/include/asm/percpu.h +++ b/arch/powerpc/include/asm/percpu.h @@ -15,6 +15,16 @@ #endif /* CONFIG_SMP */ #endif /* __powerpc64__ */ +#if defined(CONFIG_NEED_PER_CPU_PAGE_FIRST_CHUNK) && defined(CONFIG_SMP) +#include +DECLARE_STATIC_KEY_FALSE(__percpu_first_chunk_is_paged); + +#define percpu_first_chunk_is_paged \ + (static_key_enabled(&__percpu_first_chunk_is_paged.key)) +#else +#define percpu_first_chunk_is_paged false +#endif /* CONFIG_PPC64 && CONFIG_SMP */ + #include #include diff --git a/arch/powerpc/kernel/setup-common.c b/arch/powerpc/kernel/setup-common.c index 01ed1263e1a98..4bd2f87616baa 100644 --- a/arch/powerpc/kernel/setup-common.c +++ b/arch/powerpc/kernel/setup-common.c @@ -405,7 +405,7 @@ static void __init cpu_init_thread_core_maps(int tpc) cpumask_set_cpu(i, &threads_core_mask); printk(KERN_INFO "CPU maps initialized for %d thread%s per core\n", - tpc, tpc > 1 ? "s" : ""); + tpc, str_plural(tpc)); printk(KERN_DEBUG " (thread shift is %d)\n", threads_shift); } diff --git a/arch/powerpc/kernel/setup_64.c b/arch/powerpc/kernel/setup_64.c index 2f19d5e944852..ae36a129789ff 100644 --- a/arch/powerpc/kernel/setup_64.c +++ b/arch/powerpc/kernel/setup_64.c @@ -834,6 +834,7 @@ static __init int pcpu_cpu_to_node(int cpu) unsigned long __per_cpu_offset[NR_CPUS] __read_mostly; EXPORT_SYMBOL(__per_cpu_offset); +DEFINE_STATIC_KEY_FALSE(__percpu_first_chunk_is_paged); void __init setup_per_cpu_areas(void) { @@ -876,6 +877,7 @@ void __init setup_per_cpu_areas(void) if (rc < 0) panic("cannot initialize percpu area (err=%d)", rc); + static_key_enable(&__percpu_first_chunk_is_paged.key); delta = (unsigned long)pcpu_base_addr - (unsigned long)__per_cpu_start; for_each_possible_cpu(cpu) { __per_cpu_offset[cpu] = delta + pcpu_unit_offsets[cpu]; diff --git a/arch/powerpc/lib/feature-fixups.c b/arch/powerpc/lib/feature-fixups.c index 4f82581ca2034..b7201ba50b2ea 100644 --- a/arch/powerpc/lib/feature-fixups.c +++ b/arch/powerpc/lib/feature-fixups.c @@ -25,6 +25,13 @@ #include #include +/* + * Used to generate warnings if mmu or cpu feature check functions that + * use static keys before they are initialized. + */ +bool static_key_feature_checks_initialized __read_mostly; +EXPORT_SYMBOL_GPL(static_key_feature_checks_initialized); + struct fixup_entry { unsigned long mask; unsigned long value; @@ -679,6 +686,7 @@ void __init setup_feature_keys(void) jump_label_init(); cpu_feature_keys_init(); mmu_feature_keys_init(); + static_key_feature_checks_initialized = true; } static int __init check_features(void) diff --git a/arch/powerpc/mm/ptdump/hashpagetable.c b/arch/powerpc/mm/ptdump/hashpagetable.c index 9a601587836b2..a6baa6166d940 100644 --- a/arch/powerpc/mm/ptdump/hashpagetable.c +++ b/arch/powerpc/mm/ptdump/hashpagetable.c @@ -491,7 +491,7 @@ static void walk_vmemmap(struct pg_state *st) * Traverse the vmemmaped memory and dump pages that are in the hash * pagetable. */ - while (ptr->list) { + while (ptr) { hpte_find(st, ptr->virt_addr, mmu_vmemmap_psize); ptr = ptr->list; } diff --git a/arch/powerpc/platforms/52xx/mpc52xx_common.c b/arch/powerpc/platforms/52xx/mpc52xx_common.c index b4938e344f71f..253421ffb4e58 100644 --- a/arch/powerpc/platforms/52xx/mpc52xx_common.c +++ b/arch/powerpc/platforms/52xx/mpc52xx_common.c @@ -12,12 +12,10 @@ #undef DEBUG -#include #include #include #include #include -#include #include #include #include diff --git a/arch/powerpc/platforms/52xx/mpc52xx_gpt.c b/arch/powerpc/platforms/52xx/mpc52xx_gpt.c index 581059527c36a..2bd6abcdc113b 100644 --- a/arch/powerpc/platforms/52xx/mpc52xx_gpt.c +++ b/arch/powerpc/platforms/52xx/mpc52xx_gpt.c @@ -48,6 +48,7 @@ * the output mode. This driver does not change the output mode setting. */ +#include #include #include #include @@ -56,7 +57,6 @@ #include #include #include -#include #include #include #include diff --git a/arch/powerpc/platforms/ps3/device-init.c b/arch/powerpc/platforms/ps3/device-init.c index 878bc160246e2..b18e1c92e554c 100644 --- a/arch/powerpc/platforms/ps3/device-init.c +++ b/arch/powerpc/platforms/ps3/device-init.c @@ -770,49 +770,51 @@ static struct task_struct *probe_task; static int ps3_probe_thread(void *data) { - struct ps3_notification_device dev; + struct { + struct ps3_notification_device dev; + u8 buf[512]; + } *local; + struct ps3_notify_cmd *notify_cmd; + struct ps3_notify_event *notify_event; int res; unsigned int irq; u64 lpar; - void *buf; - struct ps3_notify_cmd *notify_cmd; - struct ps3_notify_event *notify_event; pr_debug(" -> %s:%u: kthread started\n", __func__, __LINE__); - buf = kzalloc(512, GFP_KERNEL); - if (!buf) + local = kzalloc(sizeof(*local), GFP_KERNEL); + if (!local) return -ENOMEM; - lpar = ps3_mm_phys_to_lpar(__pa(buf)); - notify_cmd = buf; - notify_event = buf; + lpar = ps3_mm_phys_to_lpar(__pa(&local->buf)); + notify_cmd = (struct ps3_notify_cmd *)&local->buf; + notify_event = (struct ps3_notify_event *)&local->buf; /* dummy system bus device */ - dev.sbd.bus_id = (u64)data; - dev.sbd.dev_id = PS3_NOTIFICATION_DEV_ID; - dev.sbd.interrupt_id = PS3_NOTIFICATION_INTERRUPT_ID; + local->dev.sbd.bus_id = (u64)data; + local->dev.sbd.dev_id = PS3_NOTIFICATION_DEV_ID; + local->dev.sbd.interrupt_id = PS3_NOTIFICATION_INTERRUPT_ID; - res = lv1_open_device(dev.sbd.bus_id, dev.sbd.dev_id, 0); + res = lv1_open_device(local->dev.sbd.bus_id, local->dev.sbd.dev_id, 0); if (res) { pr_err("%s:%u: lv1_open_device failed %s\n", __func__, __LINE__, ps3_result(res)); goto fail_free; } - res = ps3_sb_event_receive_port_setup(&dev.sbd, PS3_BINDING_CPU_ANY, - &irq); + res = ps3_sb_event_receive_port_setup(&local->dev.sbd, + PS3_BINDING_CPU_ANY, &irq); if (res) { pr_err("%s:%u: ps3_sb_event_receive_port_setup failed %d\n", __func__, __LINE__, res); goto fail_close_device; } - spin_lock_init(&dev.lock); - rcuwait_init(&dev.wait); + spin_lock_init(&local->dev.lock); + rcuwait_init(&local->dev.wait); res = request_irq(irq, ps3_notification_interrupt, 0, - "ps3_notification", &dev); + "ps3_notification", &local->dev); if (res) { pr_err("%s:%u: request_irq failed %d\n", __func__, __LINE__, res); @@ -823,7 +825,7 @@ static int ps3_probe_thread(void *data) notify_cmd->operation_code = 0; /* must be zero */ notify_cmd->event_mask = 1UL << notify_region_probe; - res = ps3_notification_read_write(&dev, lpar, 1); + res = ps3_notification_read_write(&local->dev, lpar, 1); if (res) goto fail_free_irq; @@ -834,36 +836,37 @@ static int ps3_probe_thread(void *data) memset(notify_event, 0, sizeof(*notify_event)); - res = ps3_notification_read_write(&dev, lpar, 0); + res = ps3_notification_read_write(&local->dev, lpar, 0); if (res) break; pr_debug("%s:%u: notify event type 0x%llx bus id %llu dev id %llu" " type %llu port %llu\n", __func__, __LINE__, - notify_event->event_type, notify_event->bus_id, - notify_event->dev_id, notify_event->dev_type, - notify_event->dev_port); + notify_event->event_type, notify_event->bus_id, + notify_event->dev_id, notify_event->dev_type, + notify_event->dev_port); if (notify_event->event_type != notify_region_probe || - notify_event->bus_id != dev.sbd.bus_id) { + notify_event->bus_id != local->dev.sbd.bus_id) { pr_warn("%s:%u: bad notify_event: event %llu, dev_id %llu, dev_type %llu\n", __func__, __LINE__, notify_event->event_type, notify_event->dev_id, notify_event->dev_type); continue; } - ps3_find_and_add_device(dev.sbd.bus_id, notify_event->dev_id); + ps3_find_and_add_device(local->dev.sbd.bus_id, + notify_event->dev_id); } while (!kthread_should_stop()); fail_free_irq: - free_irq(irq, &dev); + free_irq(irq, &local->dev); fail_sb_event_receive_port_destroy: - ps3_sb_event_receive_port_destroy(&dev.sbd, irq); + ps3_sb_event_receive_port_destroy(&local->dev.sbd, irq); fail_close_device: - lv1_close_device(dev.sbd.bus_id, dev.sbd.dev_id); + lv1_close_device(local->dev.sbd.bus_id, local->dev.sbd.dev_id); fail_free: - kfree(buf); + kfree(local); probe_task = NULL; diff --git a/arch/powerpc/sysdev/fsl_msi.c b/arch/powerpc/sysdev/fsl_msi.c index 8e6c84df4ca10..e205135ae1fea 100644 --- a/arch/powerpc/sysdev/fsl_msi.c +++ b/arch/powerpc/sysdev/fsl_msi.c @@ -564,10 +564,12 @@ static const struct fsl_msi_feature ipic_msi_feature = { .msiir_offset = 0x38, }; +#ifdef CONFIG_EPAPR_PARAVIRT static const struct fsl_msi_feature vmpic_msi_feature = { .fsl_pic_ip = FSL_PIC_IP_VMPIC, .msiir_offset = 0, }; +#endif static const struct of_device_id fsl_of_msi_ids[] = { {