diff options
Diffstat (limited to 'arch/powerpc/kernel')
25 files changed, 225 insertions, 100 deletions
diff --git a/arch/powerpc/kernel/eeh_driver.c b/arch/powerpc/kernel/eeh_driver.c index 4fd7efdf2a53..68decc2bf42b 100644 --- a/arch/powerpc/kernel/eeh_driver.c +++ b/arch/powerpc/kernel/eeh_driver.c @@ -1072,45 +1072,46 @@ void eeh_handle_normal_event(struct eeh_pe *pe) } pr_info("EEH: Recovery successful.\n"); - } else { - /* - * About 90% of all real-life EEH failures in the field - * are due to poorly seated PCI cards. Only 10% or so are - * due to actual, failed cards. - */ - pr_err("EEH: Unable to recover from failure from PHB#%x-PE#%x.\n" - "Please try reseating or replacing it\n", - pe->phb->global_number, pe->addr); + goto out; + } - eeh_slot_error_detail(pe, EEH_LOG_PERM); + /* + * About 90% of all real-life EEH failures in the field + * are due to poorly seated PCI cards. Only 10% or so are + * due to actual, failed cards. + */ + pr_err("EEH: Unable to recover from failure from PHB#%x-PE#%x.\n" + "Please try reseating or replacing it\n", + pe->phb->global_number, pe->addr); - /* Notify all devices that they're about to go down. */ - eeh_set_channel_state(pe, pci_channel_io_perm_failure); - eeh_set_irq_state(pe, false); - eeh_pe_report("error_detected(permanent failure)", pe, - eeh_report_failure, NULL); + eeh_slot_error_detail(pe, EEH_LOG_PERM); - /* Mark the PE to be removed permanently */ - eeh_pe_state_mark(pe, EEH_PE_REMOVED); + /* Notify all devices that they're about to go down. */ + eeh_set_irq_state(pe, false); + eeh_pe_report("error_detected(permanent failure)", pe, + eeh_report_failure, NULL); + eeh_set_channel_state(pe, pci_channel_io_perm_failure); - /* - * Shut down the device drivers for good. We mark - * all removed devices correctly to avoid access - * the their PCI config any more. - */ - if (pe->type & EEH_PE_VF) { - eeh_pe_dev_traverse(pe, eeh_rmv_device, NULL); - eeh_pe_dev_mode_mark(pe, EEH_DEV_REMOVED); - } else { - eeh_pe_state_clear(pe, EEH_PE_PRI_BUS, true); - eeh_pe_dev_mode_mark(pe, EEH_DEV_REMOVED); + /* Mark the PE to be removed permanently */ + eeh_pe_state_mark(pe, EEH_PE_REMOVED); - pci_lock_rescan_remove(); - pci_hp_remove_devices(bus); - pci_unlock_rescan_remove(); - /* The passed PE should no longer be used */ - return; - } + /* + * Shut down the device drivers for good. We mark + * all removed devices correctly to avoid access + * the their PCI config any more. + */ + if (pe->type & EEH_PE_VF) { + eeh_pe_dev_traverse(pe, eeh_rmv_device, NULL); + eeh_pe_dev_mode_mark(pe, EEH_DEV_REMOVED); + } else { + eeh_pe_state_clear(pe, EEH_PE_PRI_BUS, true); + eeh_pe_dev_mode_mark(pe, EEH_DEV_REMOVED); + + pci_lock_rescan_remove(); + pci_hp_remove_devices(bus); + pci_unlock_rescan_remove(); + /* The passed PE should no longer be used */ + return; } out: @@ -1206,10 +1207,10 @@ void eeh_handle_special_event(void) /* Notify all devices to be down */ eeh_pe_state_clear(pe, EEH_PE_PRI_BUS, true); - eeh_set_channel_state(pe, pci_channel_io_perm_failure); eeh_pe_report( "error_detected(permanent failure)", pe, eeh_report_failure, NULL); + eeh_set_channel_state(pe, pci_channel_io_perm_failure); pci_lock_rescan_remove(); list_for_each_entry(hose, &hose_list, list_node) { diff --git a/arch/powerpc/kernel/fadump.c b/arch/powerpc/kernel/fadump.c index 0455dc1b2797..15405db43141 100644 --- a/arch/powerpc/kernel/fadump.c +++ b/arch/powerpc/kernel/fadump.c @@ -629,6 +629,7 @@ int __init fadump_reserve_mem(void) return ret; error_out: fw_dump.fadump_enabled = 0; + fw_dump.reserve_dump_area_size = 0; return 0; } @@ -835,7 +836,6 @@ static int fadump_alloc_mem_ranges(struct fadump_mrange_info *mrange_info) sizeof(struct fadump_memory_range)); return 0; } - static inline int fadump_add_mem_range(struct fadump_mrange_info *mrange_info, u64 base, u64 end) { @@ -854,7 +854,12 @@ static inline int fadump_add_mem_range(struct fadump_mrange_info *mrange_info, start = mem_ranges[mrange_info->mem_range_cnt - 1].base; size = mem_ranges[mrange_info->mem_range_cnt - 1].size; - if ((start + size) == base) + /* + * Boot memory area needs separate PT_LOAD segment(s) as it + * is moved to a different location at the time of crash. + * So, fold only if the region is not boot memory area. + */ + if ((start + size) == base && start >= fw_dump.boot_mem_top) is_adjacent = true; } if (!is_adjacent) { diff --git a/arch/powerpc/kernel/fpu.S b/arch/powerpc/kernel/fpu.S index 0bb991ddd264..81981bb878ee 100644 --- a/arch/powerpc/kernel/fpu.S +++ b/arch/powerpc/kernel/fpu.S @@ -24,6 +24,15 @@ #include <asm/feature-fixups.h> #ifdef CONFIG_VSX +#define __REST_1FPVSR(n,c,base) \ +BEGIN_FTR_SECTION \ + b 2f; \ +END_FTR_SECTION_IFSET(CPU_FTR_VSX); \ + REST_FPR(n,base); \ + b 3f; \ +2: REST_VSR(n,c,base); \ +3: + #define __REST_32FPVSRS(n,c,base) \ BEGIN_FTR_SECTION \ b 2f; \ @@ -42,9 +51,11 @@ END_FTR_SECTION_IFSET(CPU_FTR_VSX); \ 2: SAVE_32VSRS(n,c,base); \ 3: #else +#define __REST_1FPVSR(n,b,base) REST_FPR(n, base) #define __REST_32FPVSRS(n,b,base) REST_32FPRS(n, base) #define __SAVE_32FPVSRS(n,b,base) SAVE_32FPRS(n, base) #endif +#define REST_1FPVSR(n,c,base) __REST_1FPVSR(n,__REG_##c,__REG_##base) #define REST_32FPVSRS(n,c,base) __REST_32FPVSRS(n,__REG_##c,__REG_##base) #define SAVE_32FPVSRS(n,c,base) __SAVE_32FPVSRS(n,__REG_##c,__REG_##base) @@ -68,6 +79,7 @@ _GLOBAL(store_fp_state) SAVE_32FPVSRS(0, R4, R3) mffs fr0 stfd fr0,FPSTATE_FPSCR(r3) + REST_1FPVSR(0, R4, R3) blr EXPORT_SYMBOL(store_fp_state) @@ -132,6 +144,7 @@ _GLOBAL(save_fpu) 2: SAVE_32FPVSRS(0, R4, R6) mffs fr0 stfd fr0,FPSTATE_FPSCR(r6) + REST_1FPVSR(0, R4, R6) blr /* diff --git a/arch/powerpc/kernel/head_32.S b/arch/powerpc/kernel/head_32.S index edaab1142498..2b0e2eb7bde8 100644 --- a/arch/powerpc/kernel/head_32.S +++ b/arch/powerpc/kernel/head_32.S @@ -922,7 +922,7 @@ END_MMU_FTR_SECTION_IFSET(MMU_FTR_HPTE_TABLE) */ lis r5, abatron_pteptrs@h ori r5, r5, abatron_pteptrs@l - stw r5, 0xf0(r0) /* This much match your Abatron config */ + stw r5, 0xf0(0) /* This much match your Abatron config */ lis r6, swapper_pg_dir@h ori r6, r6, swapper_pg_dir@l tophys(r5, r5) diff --git a/arch/powerpc/kernel/hw_breakpoint.c b/arch/powerpc/kernel/hw_breakpoint.c index 1007ec36b4cb..fb736fdb4193 100644 --- a/arch/powerpc/kernel/hw_breakpoint.c +++ b/arch/powerpc/kernel/hw_breakpoint.c @@ -247,6 +247,11 @@ disable: return false; } +/* + * Handle a DABR or DAWR exception. + * + * Called in atomic context. + */ int hw_breakpoint_handler(struct die_args *args) { int rc = NOTIFY_STOP; @@ -315,6 +320,8 @@ NOKPROBE_SYMBOL(hw_breakpoint_handler); /* * Handle single-step exceptions following a DABR hit. + * + * Called in atomic context. */ static int single_step_dabr_instruction(struct die_args *args) { @@ -355,6 +362,8 @@ NOKPROBE_SYMBOL(single_step_dabr_instruction); /* * Handle debug exception notifications. + * + * Called in atomic context. */ int hw_breakpoint_exceptions_notify( struct notifier_block *unused, unsigned long val, void *data) diff --git a/arch/powerpc/kernel/idle.c b/arch/powerpc/kernel/idle.c index a36fd053c3db..0615ba86baef 100644 --- a/arch/powerpc/kernel/idle.c +++ b/arch/powerpc/kernel/idle.c @@ -37,7 +37,7 @@ static int __init powersave_off(char *arg) { ppc_md.power_save = NULL; cpuidle_disable = IDLE_POWERSAVE_OFF; - return 0; + return 1; } __setup("powersave=off", powersave_off); diff --git a/arch/powerpc/kernel/idle_6xx.S b/arch/powerpc/kernel/idle_6xx.S index 0ffdd18b9f26..acb8215c5a01 100644 --- a/arch/powerpc/kernel/idle_6xx.S +++ b/arch/powerpc/kernel/idle_6xx.S @@ -129,7 +129,7 @@ BEGIN_FTR_SECTION END_FTR_SECTION_IFCLR(CPU_FTR_NO_DPM) mtspr SPRN_HID0,r4 BEGIN_FTR_SECTION - DSSALL + PPC_DSSALL sync END_FTR_SECTION_IFSET(CPU_FTR_ALTIVEC) lwz r8,TI_LOCAL_FLAGS(r2) /* set napping bit */ diff --git a/arch/powerpc/kernel/iommu.c b/arch/powerpc/kernel/iommu.c index d7d42bd448c4..dd062eef533b 100644 --- a/arch/powerpc/kernel/iommu.c +++ b/arch/powerpc/kernel/iommu.c @@ -133,17 +133,28 @@ static int fail_iommu_bus_notify(struct notifier_block *nb, return 0; } -static struct notifier_block fail_iommu_bus_notifier = { +/* + * PCI and VIO buses need separate notifier_block structs, since they're linked + * list nodes. Sharing a notifier_block would mean that any notifiers later + * registered for PCI buses would also get called by VIO buses and vice versa. + */ +static struct notifier_block fail_iommu_pci_bus_notifier = { .notifier_call = fail_iommu_bus_notify }; +#ifdef CONFIG_IBMVIO +static struct notifier_block fail_iommu_vio_bus_notifier = { + .notifier_call = fail_iommu_bus_notify +}; +#endif + static int __init fail_iommu_setup(void) { #ifdef CONFIG_PCI - bus_register_notifier(&pci_bus_type, &fail_iommu_bus_notifier); + bus_register_notifier(&pci_bus_type, &fail_iommu_pci_bus_notifier); #endif #ifdef CONFIG_IBMVIO - bus_register_notifier(&vio_bus_type, &fail_iommu_bus_notifier); + bus_register_notifier(&vio_bus_type, &fail_iommu_vio_bus_notifier); #endif return 0; diff --git a/arch/powerpc/kernel/l2cr_6xx.S b/arch/powerpc/kernel/l2cr_6xx.S index 2020d255585f..7684f644e93e 100644 --- a/arch/powerpc/kernel/l2cr_6xx.S +++ b/arch/powerpc/kernel/l2cr_6xx.S @@ -96,7 +96,7 @@ END_FTR_SECTION_IFCLR(CPU_FTR_L2CR) /* Stop DST streams */ BEGIN_FTR_SECTION - DSSALL + PPC_DSSALL sync END_FTR_SECTION_IFSET(CPU_FTR_ALTIVEC) @@ -293,7 +293,7 @@ END_FTR_SECTION_IFCLR(CPU_FTR_L3CR) isync /* Stop DST streams */ - DSSALL + PPC_DSSALL sync /* Get the current enable bit of the L3CR into r4 */ @@ -402,7 +402,7 @@ END_FTR_SECTION_IFSET(CPU_FTR_L3CR) _GLOBAL(__flush_disable_L1) /* Stop pending alitvec streams and memory accesses */ BEGIN_FTR_SECTION - DSSALL + PPC_DSSALL END_FTR_SECTION_IFSET(CPU_FTR_ALTIVEC) sync diff --git a/arch/powerpc/kernel/pci-common.c b/arch/powerpc/kernel/pci-common.c index a2c258a8d736..b9cb9fa9207a 100644 --- a/arch/powerpc/kernel/pci-common.c +++ b/arch/powerpc/kernel/pci-common.c @@ -66,23 +66,35 @@ void set_pci_dma_ops(const struct dma_map_ops *dma_ops) pci_dma_ops = dma_ops; } -/* - * This function should run under locking protection, specifically - * hose_spinlock. - */ static int get_phb_number(struct device_node *dn) { int ret, phb_id = -1; - u32 prop_32; u64 prop; /* * Try fixed PHB numbering first, by checking archs and reading - * the respective device-tree properties. Firstly, try powernv by - * reading "ibm,opal-phbid", only present in OPAL environment. + * the respective device-tree properties. Firstly, try reading + * standard "linux,pci-domain", then try reading "ibm,opal-phbid" + * (only present in powernv OPAL environment), then try device-tree + * alias and as the last try to use lower bits of "reg" property. */ - ret = of_property_read_u64(dn, "ibm,opal-phbid", &prop); + ret = of_get_pci_domain_nr(dn); + if (ret >= 0) { + prop = ret; + ret = 0; + } + if (ret) + ret = of_property_read_u64(dn, "ibm,opal-phbid", &prop); + if (ret) { + ret = of_alias_get_id(dn, "pci"); + if (ret >= 0) { + prop = ret; + ret = 0; + } + } + if (ret) { + u32 prop_32; ret = of_property_read_u32_index(dn, "reg", 1, &prop_32); prop = prop_32; } @@ -90,18 +102,20 @@ static int get_phb_number(struct device_node *dn) if (!ret) phb_id = (int)(prop & (MAX_PHBS - 1)); + spin_lock(&hose_spinlock); + /* We need to be sure to not use the same PHB number twice. */ if ((phb_id >= 0) && !test_and_set_bit(phb_id, phb_bitmap)) - return phb_id; + goto out_unlock; - /* - * If not pseries nor powernv, or if fixed PHB numbering tried to add - * the same PHB number twice, then fallback to dynamic PHB numbering. - */ + /* If everything fails then fallback to dynamic PHB numbering. */ phb_id = find_first_zero_bit(phb_bitmap, MAX_PHBS); BUG_ON(phb_id >= MAX_PHBS); set_bit(phb_id, phb_bitmap); +out_unlock: + spin_unlock(&hose_spinlock); + return phb_id; } @@ -112,10 +126,13 @@ struct pci_controller *pcibios_alloc_controller(struct device_node *dev) phb = zalloc_maybe_bootmem(sizeof(struct pci_controller), GFP_KERNEL); if (phb == NULL) return NULL; - spin_lock(&hose_spinlock); + phb->global_number = get_phb_number(dev); + + spin_lock(&hose_spinlock); list_add_tail(&phb->list_node, &hose_list); spin_unlock(&hose_spinlock); + phb->dn = dev; phb->is_dynamic = slab_is_available(); #ifdef CONFIG_PPC64 diff --git a/arch/powerpc/kernel/pci_dn.c b/arch/powerpc/kernel/pci_dn.c index d876eda92609..d28433f0fc8e 100644 --- a/arch/powerpc/kernel/pci_dn.c +++ b/arch/powerpc/kernel/pci_dn.c @@ -325,6 +325,7 @@ struct pci_dn *pci_add_device_node_info(struct pci_controller *hose, INIT_LIST_HEAD(&pdn->list); parent = of_get_parent(dn); pdn->parent = parent ? PCI_DN(parent) : NULL; + of_node_put(parent); if (pdn->parent) list_add_tail(&pdn->list, &pdn->parent->child_list); diff --git a/arch/powerpc/kernel/process.c b/arch/powerpc/kernel/process.c index c94bba9142e7..cf87573e6e78 100644 --- a/arch/powerpc/kernel/process.c +++ b/arch/powerpc/kernel/process.c @@ -1719,7 +1719,7 @@ void start_thread(struct pt_regs *regs, unsigned long start, unsigned long sp) tm_reclaim_current(0); #endif - memset(regs->gpr, 0, sizeof(regs->gpr)); + memset(®s->gpr[1], 0, sizeof(regs->gpr) - sizeof(regs->gpr[0])); regs->ctr = 0; regs->link = 0; regs->xer = 0; @@ -2001,12 +2001,12 @@ static unsigned long __get_wchan(struct task_struct *p) return 0; do { - sp = *(unsigned long *)sp; + sp = READ_ONCE_NOCHECK(*(unsigned long *)sp); if (!validate_sp(sp, p, STACK_FRAME_OVERHEAD) || p->state == TASK_RUNNING) return 0; if (count > 0) { - ip = ((unsigned long *)sp)[STACK_FRAME_LR_SAVE]; + ip = READ_ONCE_NOCHECK(((unsigned long *)sp)[STACK_FRAME_LR_SAVE]); if (!in_sched_functions(ip)) return ip; } diff --git a/arch/powerpc/kernel/prom.c b/arch/powerpc/kernel/prom.c index 537142b877b8..d1ba17501343 100644 --- a/arch/powerpc/kernel/prom.c +++ b/arch/powerpc/kernel/prom.c @@ -740,6 +740,13 @@ void __init early_init_devtree(void *params) of_scan_flat_dt(early_init_dt_scan_root, NULL); of_scan_flat_dt(early_init_dt_scan_memory_ppc, NULL); + /* + * As generic code authors expect to be able to use static keys + * in early_param() handlers, we initialize the static keys just + * before parsing early params (it's fine to call jump_label_init() + * more than once). + */ + jump_label_init(); parse_early_param(); /* make sure we've parsed cmdline for mem= before this */ diff --git a/arch/powerpc/kernel/prom_init_check.sh b/arch/powerpc/kernel/prom_init_check.sh index b183ab9c5107..dfa5f729f774 100644 --- a/arch/powerpc/kernel/prom_init_check.sh +++ b/arch/powerpc/kernel/prom_init_check.sh @@ -13,7 +13,7 @@ # If you really need to reference something from prom_init.o add # it to the list below: -grep "^CONFIG_KASAN=y$" .config >/dev/null +grep "^CONFIG_KASAN=y$" ${KCONFIG_CONFIG} >/dev/null if [ $? -eq 0 ] then MEM_FUNCS="__memcpy __memset" diff --git a/arch/powerpc/kernel/ptrace.c b/arch/powerpc/kernel/ptrace.c index 8c92febf5f44..63bfc5250b67 100644 --- a/arch/powerpc/kernel/ptrace.c +++ b/arch/powerpc/kernel/ptrace.c @@ -3014,8 +3014,13 @@ long arch_ptrace(struct task_struct *child, long request, flush_fp_to_thread(child); if (fpidx < (PT_FPSCR - PT_FPR0)) - memcpy(&tmp, &child->thread.TS_FPR(fpidx), - sizeof(long)); + if (IS_ENABLED(CONFIG_PPC32)) { + // On 32-bit the index we are passed refers to 32-bit words + tmp = ((u32 *)child->thread.fp_state.fpr)[fpidx]; + } else { + memcpy(&tmp, &child->thread.TS_FPR(fpidx), + sizeof(long)); + } else tmp = child->thread.fp_state.fpscr; } @@ -3047,8 +3052,13 @@ long arch_ptrace(struct task_struct *child, long request, flush_fp_to_thread(child); if (fpidx < (PT_FPSCR - PT_FPR0)) - memcpy(&child->thread.TS_FPR(fpidx), &data, - sizeof(long)); + if (IS_ENABLED(CONFIG_PPC32)) { + // On 32-bit the index we are passed refers to 32-bit words + ((u32 *)child->thread.fp_state.fpr)[fpidx] = data; + } else { + memcpy(&child->thread.TS_FPR(fpidx), &data, + sizeof(long)); + } else child->thread.fp_state.fpscr = data; ret = 0; @@ -3398,4 +3408,7 @@ void __init pt_regs_check(void) offsetof(struct user_pt_regs, result)); BUILD_BUG_ON(sizeof(struct user_pt_regs) > sizeof(struct pt_regs)); + + // ptrace_get/put_fpr() rely on PPC32 and VSX being incompatible + BUILD_BUG_ON(IS_ENABLED(CONFIG_PPC32) && IS_ENABLED(CONFIG_VSX)); } diff --git a/arch/powerpc/kernel/rtas.c b/arch/powerpc/kernel/rtas.c index 9392661ac8a8..0793579f2bb9 100644 --- a/arch/powerpc/kernel/rtas.c +++ b/arch/powerpc/kernel/rtas.c @@ -51,10 +51,10 @@ struct rtas_t rtas = { EXPORT_SYMBOL(rtas); DEFINE_SPINLOCK(rtas_data_buf_lock); -EXPORT_SYMBOL(rtas_data_buf_lock); +EXPORT_SYMBOL_GPL(rtas_data_buf_lock); -char rtas_data_buf[RTAS_DATA_BUF_SIZE] __cacheline_aligned; -EXPORT_SYMBOL(rtas_data_buf); +char rtas_data_buf[RTAS_DATA_BUF_SIZE] __aligned(SZ_4K); +EXPORT_SYMBOL_GPL(rtas_data_buf); unsigned long rtas_rmo_buf; @@ -63,7 +63,7 @@ unsigned long rtas_rmo_buf; * This is done like this so rtas_flash can be a module. */ void (*rtas_flash_term_hook)(int); -EXPORT_SYMBOL(rtas_flash_term_hook); +EXPORT_SYMBOL_GPL(rtas_flash_term_hook); /* RTAS use home made raw locking instead of spin_lock_irqsave * because those can be called from within really nasty contexts @@ -311,7 +311,7 @@ void rtas_progress(char *s, unsigned short hex) spin_unlock(&progress_lock); } -EXPORT_SYMBOL(rtas_progress); /* needed by rtas_flash module */ +EXPORT_SYMBOL_GPL(rtas_progress); /* needed by rtas_flash module */ int rtas_token(const char *service) { @@ -321,7 +321,7 @@ int rtas_token(const char *service) tokp = of_get_property(rtas.dev, service, NULL); return tokp ? be32_to_cpu(*tokp) : RTAS_UNKNOWN_SERVICE; } -EXPORT_SYMBOL(rtas_token); +EXPORT_SYMBOL_GPL(rtas_token); int rtas_service_present(const char *service) { @@ -398,7 +398,7 @@ static char *__fetch_rtas_last_error(char *altbuf) buf = kmalloc(RTAS_ERROR_LOG_MAX, GFP_ATOMIC); } if (buf) - memcpy(buf, rtas_err_buf, RTAS_ERROR_LOG_MAX); + memmove(buf, rtas_err_buf, RTAS_ERROR_LOG_MAX); } return buf; @@ -481,7 +481,7 @@ int rtas_call(int token, int nargs, int nret, int *outputs, ...) } return ret; } -EXPORT_SYMBOL(rtas_call); +EXPORT_SYMBOL_GPL(rtas_call); /* For RTAS_BUSY (-2), delay for 1 millisecond. For an extended busy status * code of 990n, perform the hinted delay of 10^n (last digit) milliseconds. @@ -516,7 +516,7 @@ unsigned int rtas_busy_delay(int status) return ms; } -EXPORT_SYMBOL(rtas_busy_delay); +EXPORT_SYMBOL_GPL(rtas_busy_delay); static int rtas_error_rc(int rtas_rc) { @@ -562,7 +562,7 @@ int rtas_get_power_level(int powerdomain, int *level) return rtas_error_rc(rc); return rc; } -EXPORT_SYMBOL(rtas_get_power_level); +EXPORT_SYMBOL_GPL(rtas_get_power_level); int rtas_set_power_level(int powerdomain, int level, int *setlevel) { @@ -580,7 +580,7 @@ int rtas_set_power_level(int powerdomain, int level, int *setlevel) return rtas_error_rc(rc); return rc; } -EXPORT_SYMBOL(rtas_set_power_level); +EXPORT_SYMBOL_GPL(rtas_set_power_level); int rtas_get_sensor(int sensor, int index, int *state) { @@ -598,7 +598,7 @@ int rtas_get_sensor(int sensor, int index, int *state) return rtas_error_rc(rc); return rc; } -EXPORT_SYMBOL(rtas_get_sensor); +EXPORT_SYMBOL_GPL(rtas_get_sensor); int rtas_get_sensor_fast(int sensor, int index, int *state) { @@ -659,7 +659,7 @@ int rtas_set_indicator(int indicator, int index, int new_value) return rtas_error_rc(rc); return rc; } -EXPORT_SYMBOL(rtas_set_indicator); +EXPORT_SYMBOL_GPL(rtas_set_indicator); /* * Ignoring RTAS extended delay @@ -714,6 +714,7 @@ void __noreturn rtas_halt(void) /* Must be in the RMO region, so we place it here */ static char rtas_os_term_buf[2048]; +static s32 ibm_os_term_token = RTAS_UNKNOWN_SERVICE; void rtas_os_term(char *str) { @@ -725,16 +726,20 @@ void rtas_os_term(char *str) * this property may terminate the partition which we want to avoid * since it interferes with panic_timeout. */ - if (RTAS_UNKNOWN_SERVICE == rtas_token("ibm,os-term") || - RTAS_UNKNOWN_SERVICE == rtas_token("ibm,extended-os-term")) + if (ibm_os_term_token == RTAS_UNKNOWN_SERVICE) return; snprintf(rtas_os_term_buf, 2048, "OS panic: %s", str); + /* + * Keep calling as long as RTAS returns a "try again" status, + * but don't use rtas_busy_delay(), which potentially + * schedules. + */ do { - status = rtas_call(rtas_token("ibm,os-term"), 1, 1, NULL, + status = rtas_call(ibm_os_term_token, 1, 1, NULL, __pa(rtas_os_term_buf)); - } while (rtas_busy_delay(status)); + } while (rtas_busy_delay_time(status)); if (status != 0) printk(KERN_EMERG "ibm,os-term call failed %d\n", status); @@ -988,7 +993,7 @@ static struct rtas_filter rtas_filters[] __ro_after_init = { { "get-time-of-day", -1, -1, -1, -1, -1 }, { "ibm,get-vpd", -1, 0, -1, 1, 2 }, { "ibm,lpar-perftools", -1, 2, 3, -1, -1 }, - { "ibm,platform-dump", -1, 4, 5, -1, -1 }, + { "ibm,platform-dump", -1, 4, 5, -1, -1 }, /* Special cased */ { "ibm,read-slot-reset-state", -1, -1, -1, -1, -1 }, { "ibm,scan-log-dump", -1, 0, 1, -1, -1 }, { "ibm,set-dynamic-indicator", -1, 2, -1, -1, -1 }, @@ -1035,6 +1040,15 @@ static bool block_rtas_call(int token, int nargs, size = 1; end = base + size - 1; + + /* + * Special case for ibm,platform-dump - NULL buffer + * address is used to indicate end of dump processing + */ + if (!strcmp(f->name, "ibm,platform-dump") && + base == 0) + return false; + if (!in_rmo_buf(base, end)) goto err; } @@ -1206,6 +1220,13 @@ void __init rtas_initialize(void) no_entry = of_property_read_u32(rtas.dev, "linux,rtas-entry", &entry); rtas.entry = no_entry ? rtas.base : entry; + /* + * Discover these now to avoid device tree lookups in the + * panic path. + */ + if (of_property_read_bool(rtas.dev, "ibm,extended-os-term")) + ibm_os_term_token = rtas_token("ibm,os-term"); + /* If RTAS was found, allocate the RMO buffer for it and look for * the stop-self token if any */ diff --git a/arch/powerpc/kernel/rtas_flash.c b/arch/powerpc/kernel/rtas_flash.c index 84f794782c62..7defca2f8e8b 100644 --- a/arch/powerpc/kernel/rtas_flash.c +++ b/arch/powerpc/kernel/rtas_flash.c @@ -710,9 +710,9 @@ static int __init rtas_flash_init(void) if (!rtas_validate_flash_data.buf) return -ENOMEM; - flash_block_cache = kmem_cache_create("rtas_flash_cache", - RTAS_BLK_SIZE, RTAS_BLK_SIZE, 0, - NULL); + flash_block_cache = kmem_cache_create_usercopy("rtas_flash_cache", + RTAS_BLK_SIZE, RTAS_BLK_SIZE, + 0, 0, RTAS_BLK_SIZE, NULL); if (!flash_block_cache) { printk(KERN_ERR "%s: failed to create block cache\n", __func__); diff --git a/arch/powerpc/kernel/swsusp_32.S b/arch/powerpc/kernel/swsusp_32.S index cbdf86228eaa..54c44aea338c 100644 --- a/arch/powerpc/kernel/swsusp_32.S +++ b/arch/powerpc/kernel/swsusp_32.S @@ -181,7 +181,7 @@ _GLOBAL(swsusp_arch_resume) #ifdef CONFIG_ALTIVEC /* Stop pending alitvec streams and memory accesses */ BEGIN_FTR_SECTION - DSSALL + PPC_DSSALL END_FTR_SECTION_IFSET(CPU_FTR_ALTIVEC) #endif sync diff --git a/arch/powerpc/kernel/swsusp_asm64.S b/arch/powerpc/kernel/swsusp_asm64.S index 6d3189830dd3..068a268a8013 100644 --- a/arch/powerpc/kernel/swsusp_asm64.S +++ b/arch/powerpc/kernel/swsusp_asm64.S @@ -142,7 +142,7 @@ END_FW_FTR_SECTION_IFCLR(FW_FEATURE_LPAR) _GLOBAL(swsusp_arch_resume) /* Stop pending alitvec streams and memory accesses */ BEGIN_FTR_SECTION - DSSALL + PPC_DSSALL END_FTR_SECTION_IFSET(CPU_FTR_ALTIVEC) sync diff --git a/arch/powerpc/kernel/systbl.S b/arch/powerpc/kernel/systbl.S index 5b905a2f4e4d..4a8f3526f5a5 100644 --- a/arch/powerpc/kernel/systbl.S +++ b/arch/powerpc/kernel/systbl.S @@ -25,6 +25,7 @@ sys_call_table: #include <asm/syscall_table_64.h> #undef __SYSCALL #else + .p2align 2 #define __SYSCALL(nr, entry) .long entry #include <asm/syscall_table_32.h> #undef __SYSCALL diff --git a/arch/powerpc/kernel/trace/ftrace.c b/arch/powerpc/kernel/trace/ftrace.c index 7ea0ca044b65..d816e714f2f4 100644 --- a/arch/powerpc/kernel/trace/ftrace.c +++ b/arch/powerpc/kernel/trace/ftrace.c @@ -328,9 +328,7 @@ static int setup_mcount_compiler_tramp(unsigned long tramp) /* Is this a known long jump tramp? */ for (i = 0; i < NUM_FTRACE_TRAMPS; i++) - if (!ftrace_tramps[i]) - break; - else if (ftrace_tramps[i] == tramp) + if (ftrace_tramps[i] == tramp) return 0; /* Is this a known plt tramp? */ @@ -868,6 +866,17 @@ void arch_ftrace_update_code(int command) extern unsigned int ftrace_tramp_text[], ftrace_tramp_init[]; +void ftrace_free_init_tramp(void) +{ + int i; + + for (i = 0; i < NUM_FTRACE_TRAMPS && ftrace_tramps[i]; i++) + if (ftrace_tramps[i] == (unsigned long)ftrace_tramp_init) { + ftrace_tramps[i] = 0; + return; + } +} + int __init ftrace_dyn_arch_init(void) { int i; diff --git a/arch/powerpc/kernel/trace/ftrace_64_mprofile.S b/arch/powerpc/kernel/trace/ftrace_64_mprofile.S index f9fd5f743eba..0bc39ff53233 100644 --- a/arch/powerpc/kernel/trace/ftrace_64_mprofile.S +++ b/arch/powerpc/kernel/trace/ftrace_64_mprofile.S @@ -36,6 +36,9 @@ _GLOBAL(ftrace_regs_caller) /* Save the original return address in A's stack frame */ std r0,LRSAVE(r1) + /* Create a minimal stack frame for representing B */ + stdu r1, -STACK_FRAME_MIN_SIZE(r1) + /* Create our stack frame + pt_regs */ stdu r1,-SWITCH_FRAME_SIZE(r1) @@ -52,7 +55,7 @@ _GLOBAL(ftrace_regs_caller) SAVE_10GPRS(22, r1) /* Save previous stack pointer (r1) */ - addi r8, r1, SWITCH_FRAME_SIZE + addi r8, r1, SWITCH_FRAME_SIZE+STACK_FRAME_MIN_SIZE std r8, GPR1(r1) /* Load special regs for save below */ @@ -65,6 +68,8 @@ _GLOBAL(ftrace_regs_caller) mflr r7 /* Save it as pt_regs->nip */ std r7, _NIP(r1) + /* Also save it in B's stackframe header for proper unwind */ + std r7, LRSAVE+SWITCH_FRAME_SIZE(r1) /* Save the read LR in pt_regs->link */ std r0, _LINK(r1) @@ -121,7 +126,7 @@ ftrace_regs_call: ld r2, 24(r1) /* Pop our stack frame */ - addi r1, r1, SWITCH_FRAME_SIZE + addi r1, r1, SWITCH_FRAME_SIZE+STACK_FRAME_MIN_SIZE #ifdef CONFIG_LIVEPATCH /* Based on the cmpd above, if the NIP was altered handle livepatch */ @@ -145,7 +150,7 @@ ftrace_no_trace: mflr r3 mtctr r3 REST_GPR(3, r1) - addi r1, r1, SWITCH_FRAME_SIZE + addi r1, r1, SWITCH_FRAME_SIZE+STACK_FRAME_MIN_SIZE mtlr r0 bctr @@ -153,6 +158,9 @@ _GLOBAL(ftrace_caller) /* Save the original return address in A's stack frame */ std r0, LRSAVE(r1) + /* Create a minimal stack frame for representing B */ + stdu r1, -STACK_FRAME_MIN_SIZE(r1) + /* Create our stack frame + pt_regs */ stdu r1, -SWITCH_FRAME_SIZE(r1) @@ -166,6 +174,7 @@ _GLOBAL(ftrace_caller) /* Get the _mcount() call site out of LR */ mflr r7 std r7, _NIP(r1) + std r7, LRSAVE+SWITCH_FRAME_SIZE(r1) /* Save callee's TOC in the ABI compliant location */ std r2, 24(r1) @@ -200,7 +209,7 @@ ftrace_call: ld r2, 24(r1) /* Pop our stack frame */ - addi r1, r1, SWITCH_FRAME_SIZE + addi r1, r1, SWITCH_FRAME_SIZE+STACK_FRAME_MIN_SIZE /* Reload original LR */ ld r0, LRSAVE(r1) diff --git a/arch/powerpc/kernel/traps.c b/arch/powerpc/kernel/traps.c index ecfa460f66d1..402a05f3a484 100644 --- a/arch/powerpc/kernel/traps.c +++ b/arch/powerpc/kernel/traps.c @@ -246,7 +246,7 @@ static void oops_end(unsigned long flags, struct pt_regs *regs, if (panic_on_oops) panic("Fatal exception"); - do_exit(signr); + make_task_dead(signr); } NOKPROBE_SYMBOL(oops_end); @@ -1424,10 +1424,12 @@ static int emulate_instruction(struct pt_regs *regs) return -EINVAL; } +#ifdef CONFIG_GENERIC_BUG int is_valid_bugaddr(unsigned long addr) { return is_kernel_addr(addr); } +#endif #ifdef CONFIG_MATH_EMULATION static int emulate_math(struct pt_regs *regs) diff --git a/arch/powerpc/kernel/vector.S b/arch/powerpc/kernel/vector.S index 8eb867dbad5f..8908bcb2e0a0 100644 --- a/arch/powerpc/kernel/vector.S +++ b/arch/powerpc/kernel/vector.S @@ -32,6 +32,7 @@ _GLOBAL(store_vr_state) mfvscr v0 li r4, VRSTATE_VSCR stvx v0, r4, r3 + lvx v0, 0, r3 blr EXPORT_SYMBOL(store_vr_state) @@ -102,6 +103,7 @@ _GLOBAL(save_altivec) mfvscr v0 li r4,VRSTATE_VSCR stvx v0,r4,r7 + lvx v0,0,r7 blr #ifdef CONFIG_VSX diff --git a/arch/powerpc/kernel/vmlinux.lds.S b/arch/powerpc/kernel/vmlinux.lds.S index 3ea360cad337..46dfb3701c6e 100644 --- a/arch/powerpc/kernel/vmlinux.lds.S +++ b/arch/powerpc/kernel/vmlinux.lds.S @@ -6,6 +6,7 @@ #endif #define BSS_FIRST_SECTIONS *(.bss.prominit) +#define RUNTIME_DISCARD_EXIT #include <asm/page.h> #include <asm-generic/vmlinux.lds.h> @@ -394,9 +395,12 @@ SECTIONS DISCARDS /DISCARD/ : { *(*.EMB.apuinfo) - *(.glink .iplt .plt .rela* .comment) + *(.glink .iplt .plt .comment) *(.gnu.version*) *(.gnu.attributes) *(.eh_frame) +#ifndef CONFIG_RELOCATABLE + *(.rela*) +#endif } } |