From d3d2176a0bc696b5365ce0e8f82a29a521d85fd0 Mon Sep 17 00:00:00 2001 From: David Gibson Date: Thu, 10 Nov 2005 15:26:20 +1100 Subject: [PATCH] powerpc: Move more ppc64 files with no ppc32 equivalent to powerpc This patch moves a bunch more files from arch/ppc64 and include/asm-ppc64 which have no equivalents in ppc32 code into arch/powerpc and include/asm-powerpc. The file affected are: hvcall.h proc_ppc64.c sysfs.c lparcfg.c rtas_pci.c The only changes apart from the move and corresponding Makefile changes are: - #ifndef/#define in includes updated to _ASM_POWERPC_ form - trailing whitespace removed - comments giving full paths removed Built and booted on POWER5 LPAR (ARCH=powerpc and ARCH=ppc64), built for 32-bit powermac (ARCH=powerpc). Signed-off-by: David Gibson Signed-off-by: Paul Mackerras --- arch/powerpc/kernel/sysfs.c | 384 ++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 384 insertions(+) create mode 100644 arch/powerpc/kernel/sysfs.c (limited to 'arch/powerpc/kernel/sysfs.c') diff --git a/arch/powerpc/kernel/sysfs.c b/arch/powerpc/kernel/sysfs.c new file mode 100644 index 00000000000..850af198fb5 --- /dev/null +++ b/arch/powerpc/kernel/sysfs.c @@ -0,0 +1,384 @@ +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +static DEFINE_PER_CPU(struct cpu, cpu_devices); + +/* SMT stuff */ + +#ifdef CONFIG_PPC_MULTIPLATFORM +/* default to snooze disabled */ +DEFINE_PER_CPU(unsigned long, smt_snooze_delay); + +static ssize_t store_smt_snooze_delay(struct sys_device *dev, const char *buf, + size_t count) +{ + struct cpu *cpu = container_of(dev, struct cpu, sysdev); + ssize_t ret; + unsigned long snooze; + + ret = sscanf(buf, "%lu", &snooze); + if (ret != 1) + return -EINVAL; + + per_cpu(smt_snooze_delay, cpu->sysdev.id) = snooze; + + return count; +} + +static ssize_t show_smt_snooze_delay(struct sys_device *dev, char *buf) +{ + struct cpu *cpu = container_of(dev, struct cpu, sysdev); + + return sprintf(buf, "%lu\n", per_cpu(smt_snooze_delay, cpu->sysdev.id)); +} + +static SYSDEV_ATTR(smt_snooze_delay, 0644, show_smt_snooze_delay, + store_smt_snooze_delay); + +/* Only parse OF options if the matching cmdline option was not specified */ +static int smt_snooze_cmdline; + +static int __init smt_setup(void) +{ + struct device_node *options; + unsigned int *val; + unsigned int cpu; + + if (!cpu_has_feature(CPU_FTR_SMT)) + return 1; + + options = find_path_device("/options"); + if (!options) + return 1; + + val = (unsigned int *)get_property(options, "ibm,smt-snooze-delay", + NULL); + if (!smt_snooze_cmdline && val) { + for_each_cpu(cpu) + per_cpu(smt_snooze_delay, cpu) = *val; + } + + return 1; +} +__initcall(smt_setup); + +static int __init setup_smt_snooze_delay(char *str) +{ + unsigned int cpu; + int snooze; + + if (!cpu_has_feature(CPU_FTR_SMT)) + return 1; + + smt_snooze_cmdline = 1; + + if (get_option(&str, &snooze)) { + for_each_cpu(cpu) + per_cpu(smt_snooze_delay, cpu) = snooze; + } + + return 1; +} +__setup("smt-snooze-delay=", setup_smt_snooze_delay); + +#endif /* CONFIG_PPC_MULTIPLATFORM */ + +/* + * Enabling PMCs will slow partition context switch times so we only do + * it the first time we write to the PMCs. + */ + +static DEFINE_PER_CPU(char, pmcs_enabled); + +void ppc64_enable_pmcs(void) +{ + /* Only need to enable them once */ + if (__get_cpu_var(pmcs_enabled)) + return; + + __get_cpu_var(pmcs_enabled) = 1; + + if (ppc_md.enable_pmcs) + ppc_md.enable_pmcs(); +} +EXPORT_SYMBOL(ppc64_enable_pmcs); + +/* XXX convert to rusty's on_one_cpu */ +static unsigned long run_on_cpu(unsigned long cpu, + unsigned long (*func)(unsigned long), + unsigned long arg) +{ + cpumask_t old_affinity = current->cpus_allowed; + unsigned long ret; + + /* should return -EINVAL to userspace */ + if (set_cpus_allowed(current, cpumask_of_cpu(cpu))) + return 0; + + ret = func(arg); + + set_cpus_allowed(current, old_affinity); + + return ret; +} + +#define SYSFS_PMCSETUP(NAME, ADDRESS) \ +static unsigned long read_##NAME(unsigned long junk) \ +{ \ + return mfspr(ADDRESS); \ +} \ +static unsigned long write_##NAME(unsigned long val) \ +{ \ + ppc64_enable_pmcs(); \ + mtspr(ADDRESS, val); \ + return 0; \ +} \ +static ssize_t show_##NAME(struct sys_device *dev, char *buf) \ +{ \ + struct cpu *cpu = container_of(dev, struct cpu, sysdev); \ + unsigned long val = run_on_cpu(cpu->sysdev.id, read_##NAME, 0); \ + return sprintf(buf, "%lx\n", val); \ +} \ +static ssize_t __attribute_used__ \ + store_##NAME(struct sys_device *dev, const char *buf, size_t count) \ +{ \ + struct cpu *cpu = container_of(dev, struct cpu, sysdev); \ + unsigned long val; \ + int ret = sscanf(buf, "%lx", &val); \ + if (ret != 1) \ + return -EINVAL; \ + run_on_cpu(cpu->sysdev.id, write_##NAME, val); \ + return count; \ +} + +SYSFS_PMCSETUP(mmcr0, SPRN_MMCR0); +SYSFS_PMCSETUP(mmcr1, SPRN_MMCR1); +SYSFS_PMCSETUP(mmcra, SPRN_MMCRA); +SYSFS_PMCSETUP(pmc1, SPRN_PMC1); +SYSFS_PMCSETUP(pmc2, SPRN_PMC2); +SYSFS_PMCSETUP(pmc3, SPRN_PMC3); +SYSFS_PMCSETUP(pmc4, SPRN_PMC4); +SYSFS_PMCSETUP(pmc5, SPRN_PMC5); +SYSFS_PMCSETUP(pmc6, SPRN_PMC6); +SYSFS_PMCSETUP(pmc7, SPRN_PMC7); +SYSFS_PMCSETUP(pmc8, SPRN_PMC8); +SYSFS_PMCSETUP(purr, SPRN_PURR); + +static SYSDEV_ATTR(mmcr0, 0600, show_mmcr0, store_mmcr0); +static SYSDEV_ATTR(mmcr1, 0600, show_mmcr1, store_mmcr1); +static SYSDEV_ATTR(mmcra, 0600, show_mmcra, store_mmcra); +static SYSDEV_ATTR(pmc1, 0600, show_pmc1, store_pmc1); +static SYSDEV_ATTR(pmc2, 0600, show_pmc2, store_pmc2); +static SYSDEV_ATTR(pmc3, 0600, show_pmc3, store_pmc3); +static SYSDEV_ATTR(pmc4, 0600, show_pmc4, store_pmc4); +static SYSDEV_ATTR(pmc5, 0600, show_pmc5, store_pmc5); +static SYSDEV_ATTR(pmc6, 0600, show_pmc6, store_pmc6); +static SYSDEV_ATTR(pmc7, 0600, show_pmc7, store_pmc7); +static SYSDEV_ATTR(pmc8, 0600, show_pmc8, store_pmc8); +static SYSDEV_ATTR(purr, 0600, show_purr, NULL); + +static void register_cpu_online(unsigned int cpu) +{ + struct cpu *c = &per_cpu(cpu_devices, cpu); + struct sys_device *s = &c->sysdev; + +#ifndef CONFIG_PPC_ISERIES + if (cpu_has_feature(CPU_FTR_SMT)) + sysdev_create_file(s, &attr_smt_snooze_delay); +#endif + + /* PMC stuff */ + + sysdev_create_file(s, &attr_mmcr0); + sysdev_create_file(s, &attr_mmcr1); + + if (cpu_has_feature(CPU_FTR_MMCRA)) + sysdev_create_file(s, &attr_mmcra); + + if (cur_cpu_spec->num_pmcs >= 1) + sysdev_create_file(s, &attr_pmc1); + if (cur_cpu_spec->num_pmcs >= 2) + sysdev_create_file(s, &attr_pmc2); + if (cur_cpu_spec->num_pmcs >= 3) + sysdev_create_file(s, &attr_pmc3); + if (cur_cpu_spec->num_pmcs >= 4) + sysdev_create_file(s, &attr_pmc4); + if (cur_cpu_spec->num_pmcs >= 5) + sysdev_create_file(s, &attr_pmc5); + if (cur_cpu_spec->num_pmcs >= 6) + sysdev_create_file(s, &attr_pmc6); + if (cur_cpu_spec->num_pmcs >= 7) + sysdev_create_file(s, &attr_pmc7); + if (cur_cpu_spec->num_pmcs >= 8) + sysdev_create_file(s, &attr_pmc8); + + if (cpu_has_feature(CPU_FTR_SMT)) + sysdev_create_file(s, &attr_purr); +} + +#ifdef CONFIG_HOTPLUG_CPU +static void unregister_cpu_online(unsigned int cpu) +{ + struct cpu *c = &per_cpu(cpu_devices, cpu); + struct sys_device *s = &c->sysdev; + + BUG_ON(c->no_control); + +#ifndef CONFIG_PPC_ISERIES + if (cpu_has_feature(CPU_FTR_SMT)) + sysdev_remove_file(s, &attr_smt_snooze_delay); +#endif + + /* PMC stuff */ + + sysdev_remove_file(s, &attr_mmcr0); + sysdev_remove_file(s, &attr_mmcr1); + + if (cpu_has_feature(CPU_FTR_MMCRA)) + sysdev_remove_file(s, &attr_mmcra); + + if (cur_cpu_spec->num_pmcs >= 1) + sysdev_remove_file(s, &attr_pmc1); + if (cur_cpu_spec->num_pmcs >= 2) + sysdev_remove_file(s, &attr_pmc2); + if (cur_cpu_spec->num_pmcs >= 3) + sysdev_remove_file(s, &attr_pmc3); + if (cur_cpu_spec->num_pmcs >= 4) + sysdev_remove_file(s, &attr_pmc4); + if (cur_cpu_spec->num_pmcs >= 5) + sysdev_remove_file(s, &attr_pmc5); + if (cur_cpu_spec->num_pmcs >= 6) + sysdev_remove_file(s, &attr_pmc6); + if (cur_cpu_spec->num_pmcs >= 7) + sysdev_remove_file(s, &attr_pmc7); + if (cur_cpu_spec->num_pmcs >= 8) + sysdev_remove_file(s, &attr_pmc8); + + if (cpu_has_feature(CPU_FTR_SMT)) + sysdev_remove_file(s, &attr_purr); +} +#endif /* CONFIG_HOTPLUG_CPU */ + +static int __devinit sysfs_cpu_notify(struct notifier_block *self, + unsigned long action, void *hcpu) +{ + unsigned int cpu = (unsigned int)(long)hcpu; + + switch (action) { + case CPU_ONLINE: + register_cpu_online(cpu); + break; +#ifdef CONFIG_HOTPLUG_CPU + case CPU_DEAD: + unregister_cpu_online(cpu); + break; +#endif + } + return NOTIFY_OK; +} + +static struct notifier_block __devinitdata sysfs_cpu_nb = { + .notifier_call = sysfs_cpu_notify, +}; + +/* NUMA stuff */ + +#ifdef CONFIG_NUMA +static struct node node_devices[MAX_NUMNODES]; + +static void register_nodes(void) +{ + int i; + + for (i = 0; i < MAX_NUMNODES; i++) { + if (node_online(i)) { + int p_node = parent_node(i); + struct node *parent = NULL; + + if (p_node != i) + parent = &node_devices[p_node]; + + register_node(&node_devices[i], i, parent); + } + } +} +#else +static void register_nodes(void) +{ + return; +} +#endif + +/* Only valid if CPU is present. */ +static ssize_t show_physical_id(struct sys_device *dev, char *buf) +{ + struct cpu *cpu = container_of(dev, struct cpu, sysdev); + + return sprintf(buf, "%d\n", get_hard_smp_processor_id(cpu->sysdev.id)); +} +static SYSDEV_ATTR(physical_id, 0444, show_physical_id, NULL); + +static int __init topology_init(void) +{ + int cpu; + struct node *parent = NULL; + + register_nodes(); + + register_cpu_notifier(&sysfs_cpu_nb); + + for_each_cpu(cpu) { + struct cpu *c = &per_cpu(cpu_devices, cpu); + +#ifdef CONFIG_NUMA + /* The node to which a cpu belongs can't be known + * until the cpu is made present. + */ + parent = NULL; + if (cpu_present(cpu)) + parent = &node_devices[cpu_to_node(cpu)]; +#endif + /* + * For now, we just see if the system supports making + * the RTAS calls for CPU hotplug. But, there may be a + * more comprehensive way to do this for an individual + * CPU. For instance, the boot cpu might never be valid + * for hotplugging. + */ + if (!ppc_md.cpu_die) + c->no_control = 1; + + if (cpu_online(cpu) || (c->no_control == 0)) { + register_cpu(c, cpu, parent); + + sysdev_create_file(&c->sysdev, &attr_physical_id); + } + + if (cpu_online(cpu)) + register_cpu_online(cpu); + } + + return 0; +} +__initcall(topology_init); -- cgit v1.2.3