diff options
Diffstat (limited to 'arch')
-rw-r--r-- | arch/powerpc/kernel/kprobes.c | 14 | ||||
-rw-r--r-- | arch/powerpc/kernel/prom.c | 70 | ||||
-rw-r--r-- | arch/powerpc/platforms/pseries/eeh_event.c | 8 | ||||
-rw-r--r-- | arch/ppc/platforms/mpc866ads_setup.c | 2 |
4 files changed, 86 insertions, 8 deletions
diff --git a/arch/powerpc/kernel/kprobes.c b/arch/powerpc/kernel/kprobes.c index 856ef1a832b9..f78866367b70 100644 --- a/arch/powerpc/kernel/kprobes.c +++ b/arch/powerpc/kernel/kprobes.c @@ -90,15 +90,15 @@ void __kprobes arch_remove_kprobe(struct kprobe *p) static void __kprobes prepare_singlestep(struct kprobe *p, struct pt_regs *regs) { - kprobe_opcode_t insn = *p->ainsn.insn; - regs->msr |= MSR_SE; - /* single step inline if it is a trap variant */ - if (is_trap(insn)) - regs->nip = (unsigned long)p->addr; - else - regs->nip = (unsigned long)p->ainsn.insn; + /* + * On powerpc we should single step on the original + * instruction even if the probed insn is a trap + * variant as values in regs could play a part in + * if the trap is taken or not + */ + regs->nip = (unsigned long)p->ainsn.insn; } static void __kprobes save_previous_kprobe(struct kprobe_ctlblk *kcb) diff --git a/arch/powerpc/kernel/prom.c b/arch/powerpc/kernel/prom.c index 1cb69e8fb0b1..9a07f97f0712 100644 --- a/arch/powerpc/kernel/prom.c +++ b/arch/powerpc/kernel/prom.c @@ -885,6 +885,74 @@ void __init unflatten_device_tree(void) DBG(" <- unflatten_device_tree()\n"); } +/* + * ibm,pa-features is a per-cpu property that contains a string of + * attribute descriptors, each of which has a 2 byte header plus up + * to 254 bytes worth of processor attribute bits. First header + * byte specifies the number of bytes following the header. + * Second header byte is an "attribute-specifier" type, of which + * zero is the only currently-defined value. + * Implementation: Pass in the byte and bit offset for the feature + * that we are interested in. The function will return -1 if the + * pa-features property is missing, or a 1/0 to indicate if the feature + * is supported/not supported. Note that the bit numbers are + * big-endian to match the definition in PAPR. + */ +static struct ibm_pa_feature { + unsigned long cpu_features; /* CPU_FTR_xxx bit */ + unsigned int cpu_user_ftrs; /* PPC_FEATURE_xxx bit */ + unsigned char pabyte; /* byte number in ibm,pa-features */ + unsigned char pabit; /* bit number (big-endian) */ + unsigned char invert; /* if 1, pa bit set => clear feature */ +} ibm_pa_features[] __initdata = { + {0, PPC_FEATURE_HAS_MMU, 0, 0, 0}, + {0, PPC_FEATURE_HAS_FPU, 0, 1, 0}, + {CPU_FTR_SLB, 0, 0, 2, 0}, + {CPU_FTR_CTRL, 0, 0, 3, 0}, + {CPU_FTR_NOEXECUTE, 0, 0, 6, 0}, + {CPU_FTR_NODSISRALIGN, 0, 1, 1, 1}, + {CPU_FTR_CI_LARGE_PAGE, 0, 1, 2, 0}, +}; + +static void __init check_cpu_pa_features(unsigned long node) +{ + unsigned char *pa_ftrs; + unsigned long len, tablelen, i, bit; + + pa_ftrs = of_get_flat_dt_prop(node, "ibm,pa-features", &tablelen); + if (pa_ftrs == NULL) + return; + + /* find descriptor with type == 0 */ + for (;;) { + if (tablelen < 3) + return; + len = 2 + pa_ftrs[0]; + if (tablelen < len) + return; /* descriptor 0 not found */ + if (pa_ftrs[1] == 0) + break; + tablelen -= len; + pa_ftrs += len; + } + + /* loop over bits we know about */ + for (i = 0; i < ARRAY_SIZE(ibm_pa_features); ++i) { + struct ibm_pa_feature *fp = &ibm_pa_features[i]; + + if (fp->pabyte >= pa_ftrs[0]) + continue; + bit = (pa_ftrs[2 + fp->pabyte] >> (7 - fp->pabit)) & 1; + if (bit ^ fp->invert) { + cur_cpu_spec->cpu_features |= fp->cpu_features; + cur_cpu_spec->cpu_user_features |= fp->cpu_user_ftrs; + } else { + cur_cpu_spec->cpu_features &= ~fp->cpu_features; + cur_cpu_spec->cpu_user_features &= ~fp->cpu_user_ftrs; + } + } +} + static int __init early_init_dt_scan_cpus(unsigned long node, const char *uname, int depth, void *data) @@ -969,6 +1037,8 @@ static int __init early_init_dt_scan_cpus(unsigned long node, } #endif /* CONFIG_ALTIVEC */ + check_cpu_pa_features(node); + #ifdef CONFIG_PPC_PSERIES if (nthreads > 1) cur_cpu_spec->cpu_features |= CPU_FTR_SMT; diff --git a/arch/powerpc/platforms/pseries/eeh_event.c b/arch/powerpc/platforms/pseries/eeh_event.c index a1bda6f96fd1..40020c65c89e 100644 --- a/arch/powerpc/platforms/pseries/eeh_event.c +++ b/arch/powerpc/platforms/pseries/eeh_event.c @@ -118,7 +118,15 @@ int eeh_send_failure_event (struct device_node *dn, { unsigned long flags; struct eeh_event *event; + char *location; + if (!mem_init_done) { + printk(KERN_ERR "EEH: event during early boot not handled\n"); + location = (char *) get_property(dn, "ibm,loc-code", NULL); + printk(KERN_ERR "EEH: device node = %s\n", dn->full_name); + printk(KERN_ERR "EEH: PCI location = %s\n", location); + return 1; + } event = kmalloc(sizeof(*event), GFP_ATOMIC); if (event == NULL) { printk (KERN_ERR "EEH: out of memory, event not handled\n"); diff --git a/arch/ppc/platforms/mpc866ads_setup.c b/arch/ppc/platforms/mpc866ads_setup.c index 6ce3b842defe..d919dab61347 100644 --- a/arch/ppc/platforms/mpc866ads_setup.c +++ b/arch/ppc/platforms/mpc866ads_setup.c @@ -378,7 +378,7 @@ int __init mpc866ads_init(void) ppc_sys_device_setfunc(MPC8xx_CPM_SMC1, PPC_SYS_FUNC_UART); #endif -#ifdef CONFIG_SERIAL_CPM_SMCer +#ifdef CONFIG_SERIAL_CPM_SMC ppc_sys_device_enable(MPC8xx_CPM_SMC2); ppc_sys_device_setfunc(MPC8xx_CPM_SMC2, PPC_SYS_FUNC_UART); #endif |