diff options
Diffstat (limited to 'arch/powerpc/platforms/powernv')
| -rw-r--r-- | arch/powerpc/platforms/powernv/opal.c | 130 | ||||
| -rw-r--r-- | arch/powerpc/platforms/powernv/setup.c | 1 |
2 files changed, 131 insertions, 0 deletions
diff --git a/arch/powerpc/platforms/powernv/opal.c b/arch/powerpc/platforms/powernv/opal.c index 5a598caefcb..aaa0dba4947 100644 --- a/arch/powerpc/platforms/powernv/opal.c +++ b/arch/powerpc/platforms/powernv/opal.c @@ -27,12 +27,14 @@ struct opal { static struct device_node *opal_node; static DEFINE_SPINLOCK(opal_write_lock); +extern u64 opal_mc_secondary_handler[]; int __init early_init_dt_scan_opal(unsigned long node, const char *uname, int depth, void *data) { const void *basep, *entryp; unsigned long basesz, entrysz; + u64 glue; if (depth != 1 || strcmp(uname, "ibm,opal") != 0) return 0; @@ -59,6 +61,19 @@ int __init early_init_dt_scan_opal(unsigned long node, printk("OPAL V1 detected !\n"); } + /* Hookup some exception handlers. We use the fwnmi area at 0x7000 + * to provide the glue space to OPAL + */ + glue = 0x7000; + opal_register_exception_handler(OPAL_MACHINE_CHECK_HANDLER, + __pa(opal_mc_secondary_handler[0]), + glue); + glue += 128; + opal_register_exception_handler(OPAL_HYPERVISOR_MAINTENANCE_HANDLER, + 0, glue); + glue += 128; + opal_register_exception_handler(OPAL_SOFTPATCH_HANDLER, 0, glue); + return 1; } @@ -136,6 +151,121 @@ int opal_put_chars(uint32_t vtermno, const char *data, int total_len) return written; } +int opal_machine_check(struct pt_regs *regs) +{ + struct opal_machine_check_event *opal_evt = get_paca()->opal_mc_evt; + struct opal_machine_check_event evt; + const char *level, *sevstr, *subtype; + static const char *opal_mc_ue_types[] = { + "Indeterminate", + "Instruction fetch", + "Page table walk ifetch", + "Load/Store", + "Page table walk Load/Store", + }; + static const char *opal_mc_slb_types[] = { + "Indeterminate", + "Parity", + "Multihit", + }; + static const char *opal_mc_erat_types[] = { + "Indeterminate", + "Parity", + "Multihit", + }; + static const char *opal_mc_tlb_types[] = { + "Indeterminate", + "Parity", + "Multihit", + }; + + /* Copy the event structure and release the original */ + evt = *opal_evt; + opal_evt->in_use = 0; + + /* Print things out */ + if (evt.version != OpalMCE_V1) { + pr_err("Machine Check Exception, Unknown event version %d !\n", + evt.version); + return 0; + } + switch(evt.severity) { + case OpalMCE_SEV_NO_ERROR: + level = KERN_INFO; + sevstr = "Harmless"; + break; + case OpalMCE_SEV_WARNING: + level = KERN_WARNING; + sevstr = ""; + break; + case OpalMCE_SEV_ERROR_SYNC: + level = KERN_ERR; + sevstr = "Severe"; + break; + case OpalMCE_SEV_FATAL: + default: + level = KERN_ERR; + sevstr = "Fatal"; + break; + } + + printk("%s%s Machine check interrupt [%s]\n", level, sevstr, + evt.disposition == OpalMCE_DISPOSITION_RECOVERED ? + "Recovered" : "[Not recovered"); + printk("%s Initiator: %s\n", level, + evt.initiator == OpalMCE_INITIATOR_CPU ? "CPU" : "Unknown"); + switch(evt.error_type) { + case OpalMCE_ERROR_TYPE_UE: + subtype = evt.u.ue_error.ue_error_type < + ARRAY_SIZE(opal_mc_ue_types) ? + opal_mc_ue_types[evt.u.ue_error.ue_error_type] + : "Unknown"; + printk("%s Error type: UE [%s]\n", level, subtype); + if (evt.u.ue_error.effective_address_provided) + printk("%s Effective address: %016llx\n", + level, evt.u.ue_error.effective_address); + if (evt.u.ue_error.physical_address_provided) + printk("%s Physial address: %016llx\n", + level, evt.u.ue_error.physical_address); + break; + case OpalMCE_ERROR_TYPE_SLB: + subtype = evt.u.slb_error.slb_error_type < + ARRAY_SIZE(opal_mc_slb_types) ? + opal_mc_slb_types[evt.u.slb_error.slb_error_type] + : "Unknown"; + printk("%s Error type: SLB [%s]\n", level, subtype); + if (evt.u.slb_error.effective_address_provided) + printk("%s Effective address: %016llx\n", + level, evt.u.slb_error.effective_address); + break; + case OpalMCE_ERROR_TYPE_ERAT: + subtype = evt.u.erat_error.erat_error_type < + ARRAY_SIZE(opal_mc_erat_types) ? + opal_mc_erat_types[evt.u.erat_error.erat_error_type] + : "Unknown"; + printk("%s Error type: ERAT [%s]\n", level, subtype); + if (evt.u.erat_error.effective_address_provided) + printk("%s Effective address: %016llx\n", + level, evt.u.erat_error.effective_address); + break; + case OpalMCE_ERROR_TYPE_TLB: + subtype = evt.u.tlb_error.tlb_error_type < + ARRAY_SIZE(opal_mc_tlb_types) ? + opal_mc_tlb_types[evt.u.tlb_error.tlb_error_type] + : "Unknown"; + printk("%s Error type: TLB [%s]\n", level, subtype); + if (evt.u.tlb_error.effective_address_provided) + printk("%s Effective address: %016llx\n", + level, evt.u.tlb_error.effective_address); + break; + default: + case OpalMCE_ERROR_TYPE_UNKNOWN: + printk("%s Error type: Unknown\n", level); + break; + } + return evt.severity == OpalMCE_SEV_FATAL ? 0 : 1; +} + static irqreturn_t opal_interrupt(int irq, void *data) { uint64_t events; diff --git a/arch/powerpc/platforms/powernv/setup.c b/arch/powerpc/platforms/powernv/setup.c index 4a2b2e27959..f0242f3fd3e 100644 --- a/arch/powerpc/platforms/powernv/setup.c +++ b/arch/powerpc/platforms/powernv/setup.c @@ -141,6 +141,7 @@ static void __init pnv_setup_machdep_opal(void) ppc_md.restart = pnv_restart; ppc_md.power_off = pnv_power_off; ppc_md.halt = pnv_halt; + ppc_md.machine_check_exception = opal_machine_check; } #ifdef CONFIG_PPC_POWERNV_RTAS |