diff options
Diffstat (limited to 'arch/x86/kernel/apic')
-rw-r--r-- | arch/x86/kernel/apic/apic.c | 43 | ||||
-rw-r--r-- | arch/x86/kernel/apic/io_apic.c | 25 | ||||
-rw-r--r-- | arch/x86/kernel/apic/x2apic_uv_x.c | 184 |
3 files changed, 197 insertions, 55 deletions
diff --git a/arch/x86/kernel/apic/apic.c b/arch/x86/kernel/apic/apic.c index 2b0faf86da1b..28446fa6bf18 100644 --- a/arch/x86/kernel/apic/apic.c +++ b/arch/x86/kernel/apic/apic.c @@ -780,8 +780,8 @@ calibrate_by_pmtimer(long deltapm, long *delta, long *deltatsc) res = (((u64)deltapm) * mult) >> 22; do_div(res, 1000000); - pr_warning("APIC calibration not consistent " - "with PM-Timer: %ldms instead of 100ms\n",(long)res); + pr_warn("APIC calibration not consistent " + "with PM-Timer: %ldms instead of 100ms\n", (long)res); /* Correct the lapic counter value */ res = (((u64)(*delta)) * pm_100ms); @@ -977,7 +977,7 @@ static int __init calibrate_APIC_clock(void) */ if (lapic_timer_period < (1000000 / HZ)) { local_irq_enable(); - pr_warning("APIC frequency too slow, disabling apic timer\n"); + pr_warn("APIC frequency too slow, disabling apic timer\n"); return -1; } @@ -1021,7 +1021,7 @@ static int __init calibrate_APIC_clock(void) local_irq_enable(); if (levt->features & CLOCK_EVT_FEAT_DUMMY) { - pr_warning("APIC timer disabled due to verification failure\n"); + pr_warn("APIC timer disabled due to verification failure\n"); return -1; } @@ -1095,8 +1095,8 @@ static void local_apic_timer_interrupt(void) * spurious. */ if (!evt->event_handler) { - pr_warning("Spurious LAPIC timer interrupt on cpu %d\n", - smp_processor_id()); + pr_warn("Spurious LAPIC timer interrupt on cpu %d\n", + smp_processor_id()); /* Switch it off */ lapic_timer_shutdown(evt); return; @@ -1811,11 +1811,11 @@ static int __init setup_nox2apic(char *str) int apicid = native_apic_msr_read(APIC_ID); if (apicid >= 255) { - pr_warning("Apicid: %08x, cannot enforce nox2apic\n", - apicid); + pr_warn("Apicid: %08x, cannot enforce nox2apic\n", + apicid); return 0; } - pr_warning("x2apic already enabled.\n"); + pr_warn("x2apic already enabled.\n"); __x2apic_disable(); } setup_clear_cpu_cap(X86_FEATURE_X2APIC); @@ -1983,7 +1983,7 @@ static int __init apic_verify(void) */ features = cpuid_edx(1); if (!(features & (1 << X86_FEATURE_APIC))) { - pr_warning("Could not enable APIC!\n"); + pr_warn("Could not enable APIC!\n"); return -1; } set_cpu_cap(&boot_cpu_data, X86_FEATURE_APIC); @@ -2337,7 +2337,7 @@ static int cpuid_to_apicid[] = { #ifdef CONFIG_SMP /** * apic_id_is_primary_thread - Check whether APIC ID belongs to a primary thread - * @id: APIC ID to check + * @apicid: APIC ID to check */ bool apic_id_is_primary_thread(unsigned int apicid) { @@ -2410,9 +2410,8 @@ int generic_processor_info(int apicid, int version) disabled_cpu_apicid == apicid) { int thiscpu = num_processors + disabled_cpus; - pr_warning("APIC: Disabling requested cpu." - " Processor %d/0x%x ignored.\n", - thiscpu, apicid); + pr_warn("APIC: Disabling requested cpu." + " Processor %d/0x%x ignored.\n", thiscpu, apicid); disabled_cpus++; return -ENODEV; @@ -2426,8 +2425,7 @@ int generic_processor_info(int apicid, int version) apicid != boot_cpu_physical_apicid) { int thiscpu = max + disabled_cpus - 1; - pr_warning( - "APIC: NR_CPUS/possible_cpus limit of %i almost" + pr_warn("APIC: NR_CPUS/possible_cpus limit of %i almost" " reached. Keeping one slot for boot cpu." " Processor %d/0x%x ignored.\n", max, thiscpu, apicid); @@ -2438,9 +2436,8 @@ int generic_processor_info(int apicid, int version) if (num_processors >= nr_cpu_ids) { int thiscpu = max + disabled_cpus; - pr_warning("APIC: NR_CPUS/possible_cpus limit of %i " - "reached. Processor %d/0x%x ignored.\n", - max, thiscpu, apicid); + pr_warn("APIC: NR_CPUS/possible_cpus limit of %i reached. " + "Processor %d/0x%x ignored.\n", max, thiscpu, apicid); disabled_cpus++; return -EINVAL; @@ -2470,13 +2467,13 @@ int generic_processor_info(int apicid, int version) * Validate version */ if (version == 0x0) { - pr_warning("BIOS bug: APIC version is 0 for CPU %d/0x%x, fixing up to 0x10\n", - cpu, apicid); + pr_warn("BIOS bug: APIC version is 0 for CPU %d/0x%x, fixing up to 0x10\n", + cpu, apicid); version = 0x10; } if (version != boot_cpu_apic_version) { - pr_warning("BIOS bug: APIC version mismatch, boot CPU: %x, CPU %d: version %x\n", + pr_warn("BIOS bug: APIC version mismatch, boot CPU: %x, CPU %d: version %x\n", boot_cpu_apic_version, cpu, version); } @@ -2845,7 +2842,7 @@ static int __init apic_set_verbosity(char *arg) apic_verbosity = APIC_VERBOSE; #ifdef CONFIG_X86_64 else { - pr_warning("APIC Verbosity level %s not recognised" + pr_warn("APIC Verbosity level %s not recognised" " use apic=verbose or apic=debug\n", arg); return -EINVAL; } diff --git a/arch/x86/kernel/apic/io_apic.c b/arch/x86/kernel/apic/io_apic.c index d6af97fd170a..913c88617848 100644 --- a/arch/x86/kernel/apic/io_apic.c +++ b/arch/x86/kernel/apic/io_apic.c @@ -1725,19 +1725,20 @@ static bool io_apic_level_ack_pending(struct mp_chip_data *data) return false; } -static inline bool ioapic_irqd_mask(struct irq_data *data) +static inline bool ioapic_prepare_move(struct irq_data *data) { - /* If we are moving the irq we need to mask it */ + /* If we are moving the IRQ we need to mask it */ if (unlikely(irqd_is_setaffinity_pending(data))) { - mask_ioapic_irq(data); + if (!irqd_irq_masked(data)) + mask_ioapic_irq(data); return true; } return false; } -static inline void ioapic_irqd_unmask(struct irq_data *data, bool masked) +static inline void ioapic_finish_move(struct irq_data *data, bool moveit) { - if (unlikely(masked)) { + if (unlikely(moveit)) { /* Only migrate the irq if the ack has been received. * * On rare occasions the broadcast level triggered ack gets @@ -1766,15 +1767,17 @@ static inline void ioapic_irqd_unmask(struct irq_data *data, bool masked) */ if (!io_apic_level_ack_pending(data->chip_data)) irq_move_masked_irq(data); - unmask_ioapic_irq(data); + /* If the IRQ is masked in the core, leave it: */ + if (!irqd_irq_masked(data)) + unmask_ioapic_irq(data); } } #else -static inline bool ioapic_irqd_mask(struct irq_data *data) +static inline bool ioapic_prepare_move(struct irq_data *data) { return false; } -static inline void ioapic_irqd_unmask(struct irq_data *data, bool masked) +static inline void ioapic_finish_move(struct irq_data *data, bool moveit) { } #endif @@ -1783,11 +1786,11 @@ static void ioapic_ack_level(struct irq_data *irq_data) { struct irq_cfg *cfg = irqd_cfg(irq_data); unsigned long v; - bool masked; + bool moveit; int i; irq_complete_move(cfg); - masked = ioapic_irqd_mask(irq_data); + moveit = ioapic_prepare_move(irq_data); /* * It appears there is an erratum which affects at least version 0x11 @@ -1842,7 +1845,7 @@ static void ioapic_ack_level(struct irq_data *irq_data) eoi_ioapic_pin(cfg->vector, irq_data->chip_data); } - ioapic_irqd_unmask(irq_data, masked); + ioapic_finish_move(irq_data, moveit); } static void ioapic_ir_ack_level(struct irq_data *irq_data) diff --git a/arch/x86/kernel/apic/x2apic_uv_x.c b/arch/x86/kernel/apic/x2apic_uv_x.c index e6230af19864..d5b51a740524 100644 --- a/arch/x86/kernel/apic/x2apic_uv_x.c +++ b/arch/x86/kernel/apic/x2apic_uv_x.c @@ -14,6 +14,8 @@ #include <linux/memory.h> #include <linux/export.h> #include <linux/pci.h> +#include <linux/acpi.h> +#include <linux/efi.h> #include <asm/e820/api.h> #include <asm/uv/uv_mmrs.h> @@ -25,12 +27,17 @@ static DEFINE_PER_CPU(int, x2apic_extra_bits); static enum uv_system_type uv_system_type; -static bool uv_hubless_system; +static int uv_hubbed_system; +static int uv_hubless_system; static u64 gru_start_paddr, gru_end_paddr; static u64 gru_dist_base, gru_first_node_paddr = -1LL, gru_last_node_paddr; static u64 gru_dist_lmask, gru_dist_umask; static union uvh_apicid uvh_apicid; +/* Unpack OEM/TABLE ID's to be NULL terminated strings */ +static u8 oem_id[ACPI_OEM_ID_SIZE + 1]; +static u8 oem_table_id[ACPI_OEM_TABLE_ID_SIZE + 1]; + /* Information derived from CPUID: */ static struct { unsigned int apicid_shift; @@ -248,17 +255,35 @@ static void __init uv_set_apicid_hibit(void) } } -static int __init uv_acpi_madt_oem_check(char *oem_id, char *oem_table_id) +static void __init uv_stringify(int len, char *to, char *from) +{ + /* Relies on 'to' being NULL chars so result will be NULL terminated */ + strncpy(to, from, len-1); +} + +static int __init uv_acpi_madt_oem_check(char *_oem_id, char *_oem_table_id) { int pnodeid; int uv_apic; + uv_stringify(sizeof(oem_id), oem_id, _oem_id); + uv_stringify(sizeof(oem_table_id), oem_table_id, _oem_table_id); + if (strncmp(oem_id, "SGI", 3) != 0) { - if (strncmp(oem_id, "NSGI", 4) == 0) { - uv_hubless_system = true; - pr_info("UV: OEM IDs %s/%s, HUBLESS\n", - oem_id, oem_table_id); - } + if (strncmp(oem_id, "NSGI", 4) != 0) + return 0; + + /* UV4 Hubless, CH, (0x11:UV4+Any) */ + if (strncmp(oem_id, "NSGI4", 5) == 0) + uv_hubless_system = 0x11; + + /* UV3 Hubless, UV300/MC990X w/o hub (0x9:UV3+Any) */ + else + uv_hubless_system = 0x9; + + pr_info("UV: OEM IDs %s/%s, HUBLESS(0x%x)\n", + oem_id, oem_table_id, uv_hubless_system); + return 0; } @@ -286,6 +311,24 @@ static int __init uv_acpi_madt_oem_check(char *oem_id, char *oem_table_id) if (uv_hub_info->hub_revision == 0) goto badbios; + switch (uv_hub_info->hub_revision) { + case UV4_HUB_REVISION_BASE: + uv_hubbed_system = 0x11; + break; + + case UV3_HUB_REVISION_BASE: + uv_hubbed_system = 0x9; + break; + + case UV2_HUB_REVISION_BASE: + uv_hubbed_system = 0x5; + break; + + case UV1_HUB_REVISION_BASE: + uv_hubbed_system = 0x3; + break; + } + pnodeid = early_get_pnodeid(); early_get_apic_socketid_shift(); @@ -336,9 +379,15 @@ int is_uv_system(void) } EXPORT_SYMBOL_GPL(is_uv_system); -int is_uv_hubless(void) +int is_uv_hubbed(int uvtype) +{ + return (uv_hubbed_system & uvtype); +} +EXPORT_SYMBOL_GPL(is_uv_hubbed); + +int is_uv_hubless(int uvtype) { - return uv_hubless_system; + return (uv_hubless_system & uvtype); } EXPORT_SYMBOL_GPL(is_uv_hubless); @@ -1255,7 +1304,8 @@ static int __init decode_uv_systab(void) struct uv_systab *st; int i; - if (uv_hub_info->hub_revision < UV4_HUB_REVISION_BASE) + /* If system is uv3 or lower, there is no extended UVsystab */ + if (is_uv_hubbed(0xfffffe) < uv(4) && is_uv_hubless(0xfffffe) < uv(4)) return 0; /* No extended UVsystab required */ st = uv_systab; @@ -1434,6 +1484,103 @@ static void __init build_socket_tables(void) } } +/* Check which reboot to use */ +static void check_efi_reboot(void) +{ + /* If EFI reboot not available, use ACPI reboot */ + if (!efi_enabled(EFI_BOOT)) + reboot_type = BOOT_ACPI; +} + +/* Setup user proc fs files */ +static int proc_hubbed_show(struct seq_file *file, void *data) +{ + seq_printf(file, "0x%x\n", uv_hubbed_system); + return 0; +} + +static int proc_hubless_show(struct seq_file *file, void *data) +{ + seq_printf(file, "0x%x\n", uv_hubless_system); + return 0; +} + +static int proc_oemid_show(struct seq_file *file, void *data) +{ + seq_printf(file, "%s/%s\n", oem_id, oem_table_id); + return 0; +} + +static int proc_hubbed_open(struct inode *inode, struct file *file) +{ + return single_open(file, proc_hubbed_show, (void *)NULL); +} + +static int proc_hubless_open(struct inode *inode, struct file *file) +{ + return single_open(file, proc_hubless_show, (void *)NULL); +} + +static int proc_oemid_open(struct inode *inode, struct file *file) +{ + return single_open(file, proc_oemid_show, (void *)NULL); +} + +/* (struct is "non-const" as open function is set at runtime) */ +static struct file_operations proc_version_fops = { + .read = seq_read, + .llseek = seq_lseek, + .release = single_release, +}; + +static const struct file_operations proc_oemid_fops = { + .open = proc_oemid_open, + .read = seq_read, + .llseek = seq_lseek, + .release = single_release, +}; + +static __init void uv_setup_proc_files(int hubless) +{ + struct proc_dir_entry *pde; + char *name = hubless ? "hubless" : "hubbed"; + + pde = proc_mkdir(UV_PROC_NODE, NULL); + proc_create("oemid", 0, pde, &proc_oemid_fops); + proc_create(name, 0, pde, &proc_version_fops); + if (hubless) + proc_version_fops.open = proc_hubless_open; + else + proc_version_fops.open = proc_hubbed_open; +} + +/* Initialize UV hubless systems */ +static __init int uv_system_init_hubless(void) +{ + int rc; + + /* Setup PCH NMI handler */ + uv_nmi_setup_hubless(); + + /* Init kernel/BIOS interface */ + rc = uv_bios_init(); + if (rc < 0) + return rc; + + /* Process UVsystab */ + rc = decode_uv_systab(); + if (rc < 0) + return rc; + + /* Create user access node */ + if (rc >= 0) + uv_setup_proc_files(1); + + check_efi_reboot(); + + return rc; +} + static void __init uv_system_init_hub(void) { struct uv_hub_info_s hub_info = {0}; @@ -1559,32 +1706,27 @@ static void __init uv_system_init_hub(void) uv_nmi_setup(); uv_cpu_init(); uv_scir_register_cpu_notifier(); - proc_mkdir("sgi_uv", NULL); + uv_setup_proc_files(0); /* Register Legacy VGA I/O redirection handler: */ pci_register_set_vga_state(uv_set_vga_state); - /* - * For a kdump kernel the reset must be BOOT_ACPI, not BOOT_EFI, as - * EFI is not enabled in the kdump kernel: - */ - if (is_kdump_kernel()) - reboot_type = BOOT_ACPI; + check_efi_reboot(); } /* - * There is a small amount of UV specific code needed to initialize a - * UV system that does not have a "UV HUB" (referred to as "hubless"). + * There is a different code path needed to initialize a UV system that does + * not have a "UV HUB" (referred to as "hubless"). */ void __init uv_system_init(void) { - if (likely(!is_uv_system() && !is_uv_hubless())) + if (likely(!is_uv_system() && !is_uv_hubless(1))) return; if (is_uv_system()) uv_system_init_hub(); else - uv_nmi_setup_hubless(); + uv_system_init_hubless(); } apic_driver(apic_x2apic_uv_x); |