12a05180fSIngo Molnar /* 22a05180fSIngo Molnar * APIC driver for "bigsmp" xAPIC machines with more than 8 virtual CPUs. 32a05180fSIngo Molnar * 42a05180fSIngo Molnar * Drives the local APIC in "clustered mode". 52a05180fSIngo Molnar */ 62a05180fSIngo Molnar #include <linux/threads.h> 72a05180fSIngo Molnar #include <linux/cpumask.h> 82a05180fSIngo Molnar #include <linux/kernel.h> 92a05180fSIngo Molnar #include <linux/init.h> 102a05180fSIngo Molnar #include <linux/dmi.h> 112a05180fSIngo Molnar #include <linux/smp.h> 122a05180fSIngo Molnar 132a05180fSIngo Molnar #include <asm/apicdef.h> 142a05180fSIngo Molnar #include <asm/fixmap.h> 152a05180fSIngo Molnar #include <asm/mpspec.h> 162a05180fSIngo Molnar #include <asm/apic.h> 172a05180fSIngo Molnar #include <asm/ipi.h> 182a05180fSIngo Molnar 199694cd6cSJiri Slaby static unsigned bigsmp_get_apic_id(unsigned long x) 202a05180fSIngo Molnar { 212a05180fSIngo Molnar return (x >> 24) & 0xFF; 222a05180fSIngo Molnar } 232a05180fSIngo Molnar 249694cd6cSJiri Slaby static int bigsmp_apic_id_registered(void) 252a05180fSIngo Molnar { 262a05180fSIngo Molnar return 1; 272a05180fSIngo Molnar } 282a05180fSIngo Molnar 297abc0753SCyrill Gorcunov static unsigned long bigsmp_check_apicid_used(physid_mask_t *map, int apicid) 302a05180fSIngo Molnar { 312a05180fSIngo Molnar return 0; 322a05180fSIngo Molnar } 332a05180fSIngo Molnar 349694cd6cSJiri Slaby static unsigned long bigsmp_check_apicid_present(int bit) 352a05180fSIngo Molnar { 362a05180fSIngo Molnar return 1; 372a05180fSIngo Molnar } 382a05180fSIngo Molnar 3912bf24a4STejun Heo static int bigsmp_early_logical_apicid(int cpu) 4012bf24a4STejun Heo { 4112bf24a4STejun Heo /* on bigsmp, logical apicid is the same as physical */ 4212bf24a4STejun Heo return early_per_cpu(x86_cpu_to_apicid, cpu); 4312bf24a4STejun Heo } 4412bf24a4STejun Heo 452a05180fSIngo Molnar static inline unsigned long calculate_ldr(int cpu) 462a05180fSIngo Molnar { 472a05180fSIngo Molnar unsigned long val, id; 482a05180fSIngo Molnar 492a05180fSIngo Molnar val = apic_read(APIC_LDR) & ~APIC_LDR_MASK; 502a05180fSIngo Molnar id = per_cpu(x86_bios_cpu_apicid, cpu); 512a05180fSIngo Molnar val |= SET_APIC_LOGICAL_ID(id); 522a05180fSIngo Molnar 532a05180fSIngo Molnar return val; 542a05180fSIngo Molnar } 552a05180fSIngo Molnar 562a05180fSIngo Molnar /* 572a05180fSIngo Molnar * Set up the logical destination ID. 582a05180fSIngo Molnar * 592a05180fSIngo Molnar * Intel recommends to set DFR, LDR and TPR before enabling 602a05180fSIngo Molnar * an APIC. See e.g. "AP-388 82489DX User's Manual" (Intel 612a05180fSIngo Molnar * document number 292116). So here it goes... 622a05180fSIngo Molnar */ 639694cd6cSJiri Slaby static void bigsmp_init_apic_ldr(void) 642a05180fSIngo Molnar { 652a05180fSIngo Molnar unsigned long val; 662a05180fSIngo Molnar int cpu = smp_processor_id(); 672a05180fSIngo Molnar 682a05180fSIngo Molnar apic_write(APIC_DFR, APIC_DFR_FLAT); 692a05180fSIngo Molnar val = calculate_ldr(cpu); 702a05180fSIngo Molnar apic_write(APIC_LDR, val); 712a05180fSIngo Molnar } 722a05180fSIngo Molnar 739694cd6cSJiri Slaby static void bigsmp_setup_apic_routing(void) 742a05180fSIngo Molnar { 752a05180fSIngo Molnar printk(KERN_INFO 762a05180fSIngo Molnar "Enabling APIC mode: Physflat. Using %d I/O APICs\n", 772a05180fSIngo Molnar nr_ioapics); 782a05180fSIngo Molnar } 792a05180fSIngo Molnar 809694cd6cSJiri Slaby static int bigsmp_cpu_present_to_apicid(int mps_cpu) 812a05180fSIngo Molnar { 822a05180fSIngo Molnar if (mps_cpu < nr_cpu_ids) 832a05180fSIngo Molnar return (int) per_cpu(x86_bios_cpu_apicid, mps_cpu); 842a05180fSIngo Molnar 852a05180fSIngo Molnar return BAD_APICID; 862a05180fSIngo Molnar } 872a05180fSIngo Molnar 887abc0753SCyrill Gorcunov static void bigsmp_ioapic_phys_id_map(physid_mask_t *phys_map, physid_mask_t *retmap) 892a05180fSIngo Molnar { 902a05180fSIngo Molnar /* For clustered we don't have a good way to do this yet - hack */ 917abc0753SCyrill Gorcunov physids_promote(0xFFL, retmap); 922a05180fSIngo Molnar } 932a05180fSIngo Molnar 94e11dadabSThomas Gleixner static int bigsmp_check_phys_apicid_present(int phys_apicid) 952a05180fSIngo Molnar { 962a05180fSIngo Molnar return 1; 972a05180fSIngo Molnar } 982a05180fSIngo Molnar 992a05180fSIngo Molnar /* As we are using single CPU as destination, pick only one CPU here */ 1004f062896SRusty Russell static unsigned int bigsmp_cpu_mask_to_apicid(const struct cpumask *cpumask) 1012a05180fSIngo Molnar { 1027632611fSTejun Heo int cpu = cpumask_first(cpumask); 1037632611fSTejun Heo 1047632611fSTejun Heo if (cpu < nr_cpu_ids) 1057632611fSTejun Heo return cpu_physical_id(cpu); 1067632611fSTejun Heo return BAD_APICID; 1072a05180fSIngo Molnar } 1082a05180fSIngo Molnar 1099694cd6cSJiri Slaby static unsigned int bigsmp_cpu_mask_to_apicid_and(const struct cpumask *cpumask, 1102a05180fSIngo Molnar const struct cpumask *andmask) 1112a05180fSIngo Molnar { 1122a05180fSIngo Molnar int cpu; 1132a05180fSIngo Molnar 1142a05180fSIngo Molnar /* 1152a05180fSIngo Molnar * We're using fixed IRQ delivery, can only return one phys APIC ID. 1162a05180fSIngo Molnar * May as well be the first. 1172a05180fSIngo Molnar */ 1182a05180fSIngo Molnar for_each_cpu_and(cpu, cpumask, andmask) { 1192a05180fSIngo Molnar if (cpumask_test_cpu(cpu, cpu_online_mask)) 1207632611fSTejun Heo return cpu_physical_id(cpu); 1212a05180fSIngo Molnar } 1227632611fSTejun Heo return BAD_APICID; 1232a05180fSIngo Molnar } 1242a05180fSIngo Molnar 1259694cd6cSJiri Slaby static int bigsmp_phys_pkg_id(int cpuid_apic, int index_msb) 1262a05180fSIngo Molnar { 1272a05180fSIngo Molnar return cpuid_apic >> index_msb; 1282a05180fSIngo Molnar } 1292a05180fSIngo Molnar 1302a05180fSIngo Molnar static inline void bigsmp_send_IPI_mask(const struct cpumask *mask, int vector) 1312a05180fSIngo Molnar { 1322a05180fSIngo Molnar default_send_IPI_mask_sequence_phys(mask, vector); 1332a05180fSIngo Molnar } 1342a05180fSIngo Molnar 1359694cd6cSJiri Slaby static void bigsmp_send_IPI_allbutself(int vector) 1362a05180fSIngo Molnar { 1372a05180fSIngo Molnar default_send_IPI_mask_allbutself_phys(cpu_online_mask, vector); 1382a05180fSIngo Molnar } 1392a05180fSIngo Molnar 1409694cd6cSJiri Slaby static void bigsmp_send_IPI_all(int vector) 1412a05180fSIngo Molnar { 1422a05180fSIngo Molnar bigsmp_send_IPI_mask(cpu_online_mask, vector); 1432a05180fSIngo Molnar } 1442a05180fSIngo Molnar 1452a05180fSIngo Molnar static int dmi_bigsmp; /* can be set by dmi scanners */ 1462a05180fSIngo Molnar 1472a05180fSIngo Molnar static int hp_ht_bigsmp(const struct dmi_system_id *d) 1482a05180fSIngo Molnar { 1492a05180fSIngo Molnar printk(KERN_NOTICE "%s detected: force use of apic=bigsmp\n", d->ident); 1502a05180fSIngo Molnar dmi_bigsmp = 1; 1512a05180fSIngo Molnar 1522a05180fSIngo Molnar return 0; 1532a05180fSIngo Molnar } 1542a05180fSIngo Molnar 1552a05180fSIngo Molnar 1562a05180fSIngo Molnar static const struct dmi_system_id bigsmp_dmi_table[] = { 1572a05180fSIngo Molnar { hp_ht_bigsmp, "HP ProLiant DL760 G2", 1582a05180fSIngo Molnar { DMI_MATCH(DMI_BIOS_VENDOR, "HP"), 1592a05180fSIngo Molnar DMI_MATCH(DMI_BIOS_VERSION, "P44-"), 1602a05180fSIngo Molnar } 1612a05180fSIngo Molnar }, 1622a05180fSIngo Molnar 1632a05180fSIngo Molnar { hp_ht_bigsmp, "HP ProLiant DL740", 1642a05180fSIngo Molnar { DMI_MATCH(DMI_BIOS_VENDOR, "HP"), 1652a05180fSIngo Molnar DMI_MATCH(DMI_BIOS_VERSION, "P47-"), 1662a05180fSIngo Molnar } 1672a05180fSIngo Molnar }, 1682a05180fSIngo Molnar { } /* NULL entry stops DMI scanning */ 1692a05180fSIngo Molnar }; 1702a05180fSIngo Molnar 1714f062896SRusty Russell static void bigsmp_vector_allocation_domain(int cpu, struct cpumask *retmask) 1722a05180fSIngo Molnar { 1734f062896SRusty Russell cpumask_clear(retmask); 1744f062896SRusty Russell cpumask_set_cpu(cpu, retmask); 1752a05180fSIngo Molnar } 1762a05180fSIngo Molnar 1772a05180fSIngo Molnar static int probe_bigsmp(void) 1782a05180fSIngo Molnar { 1792a05180fSIngo Molnar if (def_to_bigsmp) 1802a05180fSIngo Molnar dmi_bigsmp = 1; 1812a05180fSIngo Molnar else 1822a05180fSIngo Molnar dmi_check_system(bigsmp_dmi_table); 1832a05180fSIngo Molnar 1842a05180fSIngo Molnar return dmi_bigsmp; 1852a05180fSIngo Molnar } 1862a05180fSIngo Molnar 1871a8880a1SSuresh Siddha static struct apic apic_bigsmp = { 1882a05180fSIngo Molnar 1892a05180fSIngo Molnar .name = "bigsmp", 1902a05180fSIngo Molnar .probe = probe_bigsmp, 1912a05180fSIngo Molnar .acpi_madt_oem_check = NULL, 192fa63030eSDaniel J Blueman .apic_id_valid = default_apic_id_valid, 1932a05180fSIngo Molnar .apic_id_registered = bigsmp_apic_id_registered, 1942a05180fSIngo Molnar 1952a05180fSIngo Molnar .irq_delivery_mode = dest_Fixed, 1962a05180fSIngo Molnar /* phys delivery to target CPU: */ 1972a05180fSIngo Molnar .irq_dest_mode = 0, 1982a05180fSIngo Molnar 199bf721d3aSAlexander Gordeev .target_cpus = default_target_cpus, 2002a05180fSIngo Molnar .disable_esr = 1, 2012a05180fSIngo Molnar .dest_logical = 0, 2022a05180fSIngo Molnar .check_apicid_used = bigsmp_check_apicid_used, 2032a05180fSIngo Molnar .check_apicid_present = bigsmp_check_apicid_present, 2042a05180fSIngo Molnar 2052a05180fSIngo Molnar .vector_allocation_domain = bigsmp_vector_allocation_domain, 2062a05180fSIngo Molnar .init_apic_ldr = bigsmp_init_apic_ldr, 2072a05180fSIngo Molnar 2082a05180fSIngo Molnar .ioapic_phys_id_map = bigsmp_ioapic_phys_id_map, 2092a05180fSIngo Molnar .setup_apic_routing = bigsmp_setup_apic_routing, 2102a05180fSIngo Molnar .multi_timer_check = NULL, 2112a05180fSIngo Molnar .cpu_present_to_apicid = bigsmp_cpu_present_to_apicid, 2127abc0753SCyrill Gorcunov .apicid_to_cpu_present = physid_set_mask_of_physid, 2132a05180fSIngo Molnar .setup_portio_remap = NULL, 2142a05180fSIngo Molnar .check_phys_apicid_present = bigsmp_check_phys_apicid_present, 2152a05180fSIngo Molnar .enable_apic_mode = NULL, 2162a05180fSIngo Molnar .phys_pkg_id = bigsmp_phys_pkg_id, 2172a05180fSIngo Molnar .mps_oem_check = NULL, 2182a05180fSIngo Molnar 2192a05180fSIngo Molnar .get_apic_id = bigsmp_get_apic_id, 2202a05180fSIngo Molnar .set_apic_id = NULL, 2212a05180fSIngo Molnar .apic_id_mask = 0xFF << 24, 2222a05180fSIngo Molnar 2232a05180fSIngo Molnar .cpu_mask_to_apicid = bigsmp_cpu_mask_to_apicid, 2242a05180fSIngo Molnar .cpu_mask_to_apicid_and = bigsmp_cpu_mask_to_apicid_and, 2252a05180fSIngo Molnar 2262a05180fSIngo Molnar .send_IPI_mask = bigsmp_send_IPI_mask, 2272a05180fSIngo Molnar .send_IPI_mask_allbutself = NULL, 2282a05180fSIngo Molnar .send_IPI_allbutself = bigsmp_send_IPI_allbutself, 2292a05180fSIngo Molnar .send_IPI_all = bigsmp_send_IPI_all, 2302a05180fSIngo Molnar .send_IPI_self = default_send_IPI_self, 2312a05180fSIngo Molnar 2322a05180fSIngo Molnar .trampoline_phys_low = DEFAULT_TRAMPOLINE_PHYS_LOW, 2332a05180fSIngo Molnar .trampoline_phys_high = DEFAULT_TRAMPOLINE_PHYS_HIGH, 2342a05180fSIngo Molnar 2352a05180fSIngo Molnar .wait_for_init_deassert = default_wait_for_init_deassert, 2362a05180fSIngo Molnar 2372a05180fSIngo Molnar .smp_callin_clear_local_apic = NULL, 2382a05180fSIngo Molnar .inquire_remote_apic = default_inquire_remote_apic, 2392a05180fSIngo Molnar 2402a05180fSIngo Molnar .read = native_apic_mem_read, 2412a05180fSIngo Molnar .write = native_apic_mem_write, 2422a43195dSMichael S. Tsirkin .eoi_write = native_apic_mem_write, 2432a05180fSIngo Molnar .icr_read = native_apic_icr_read, 2442a05180fSIngo Molnar .icr_write = native_apic_icr_write, 2452a05180fSIngo Molnar .wait_icr_idle = native_apic_wait_icr_idle, 2462a05180fSIngo Molnar .safe_wait_icr_idle = native_safe_apic_wait_icr_idle, 247acb8bc09STejun Heo 24812bf24a4STejun Heo .x86_32_early_logical_apicid = bigsmp_early_logical_apicid, 2492a05180fSIngo Molnar }; 250107e0e0cSSuresh Siddha 251838312beSJan Beulich void __init generic_bigsmp_probe(void) 25269c252ffSSuresh Siddha { 253838312beSJan Beulich unsigned int cpu; 25469c252ffSSuresh Siddha 255838312beSJan Beulich if (!probe_bigsmp()) 256838312beSJan Beulich return; 257838312beSJan Beulich 258838312beSJan Beulich apic = &apic_bigsmp; 259838312beSJan Beulich 260838312beSJan Beulich for_each_possible_cpu(cpu) { 261838312beSJan Beulich if (early_per_cpu(x86_cpu_to_logical_apicid, 262838312beSJan Beulich cpu) == BAD_APICID) 263838312beSJan Beulich continue; 264838312beSJan Beulich early_per_cpu(x86_cpu_to_logical_apicid, cpu) = 265838312beSJan Beulich bigsmp_early_logical_apicid(cpu); 266838312beSJan Beulich } 267838312beSJan Beulich 268838312beSJan Beulich pr_info("Overriding APIC driver with %s\n", apic_bigsmp.name); 26969c252ffSSuresh Siddha } 27069c252ffSSuresh Siddha 271107e0e0cSSuresh Siddha apic_driver(apic_bigsmp); 272