1b2441318SGreg Kroah-Hartman // SPDX-License-Identifier: GPL-2.0 22a05180fSIngo Molnar /* 32a05180fSIngo Molnar * APIC driver for "bigsmp" xAPIC machines with more than 8 virtual CPUs. 42a05180fSIngo Molnar * 52a05180fSIngo Molnar * Drives the local APIC in "clustered mode". 62a05180fSIngo Molnar */ 72a05180fSIngo Molnar #include <linux/cpumask.h> 82a05180fSIngo Molnar #include <linux/dmi.h> 92a05180fSIngo Molnar #include <linux/smp.h> 102a05180fSIngo Molnar 112a05180fSIngo Molnar #include <asm/apic.h> 128b542da3SThomas Gleixner 13c94f0718SThomas Gleixner #include "local.h" 142a05180fSIngo Molnar 159694cd6cSJiri Slaby static unsigned bigsmp_get_apic_id(unsigned long x) 162a05180fSIngo Molnar { 172a05180fSIngo Molnar return (x >> 24) & 0xFF; 182a05180fSIngo Molnar } 192a05180fSIngo Molnar 209694cd6cSJiri Slaby static int bigsmp_apic_id_registered(void) 212a05180fSIngo Molnar { 222a05180fSIngo Molnar return 1; 232a05180fSIngo Molnar } 242a05180fSIngo Molnar 2557e0aa44SThomas Gleixner static bool bigsmp_check_apicid_used(physid_mask_t *map, int apicid) 262a05180fSIngo Molnar { 2757e0aa44SThomas Gleixner return false; 282a05180fSIngo Molnar } 292a05180fSIngo Molnar 3012bf24a4STejun Heo static int bigsmp_early_logical_apicid(int cpu) 3112bf24a4STejun Heo { 3212bf24a4STejun Heo /* on bigsmp, logical apicid is the same as physical */ 3312bf24a4STejun Heo return early_per_cpu(x86_cpu_to_apicid, cpu); 3412bf24a4STejun Heo } 3512bf24a4STejun Heo 362a05180fSIngo Molnar static inline unsigned long calculate_ldr(int cpu) 372a05180fSIngo Molnar { 382a05180fSIngo Molnar unsigned long val, id; 392a05180fSIngo Molnar 402a05180fSIngo Molnar val = apic_read(APIC_LDR) & ~APIC_LDR_MASK; 412a05180fSIngo Molnar id = per_cpu(x86_bios_cpu_apicid, cpu); 422a05180fSIngo Molnar val |= SET_APIC_LOGICAL_ID(id); 432a05180fSIngo Molnar 442a05180fSIngo Molnar return val; 452a05180fSIngo Molnar } 462a05180fSIngo Molnar 472a05180fSIngo Molnar /* 482a05180fSIngo Molnar * Set up the logical destination ID. 492a05180fSIngo Molnar * 502a05180fSIngo Molnar * Intel recommends to set DFR, LDR and TPR before enabling 512a05180fSIngo Molnar * an APIC. See e.g. "AP-388 82489DX User's Manual" (Intel 522a05180fSIngo Molnar * document number 292116). So here it goes... 532a05180fSIngo Molnar */ 549694cd6cSJiri Slaby static void bigsmp_init_apic_ldr(void) 552a05180fSIngo Molnar { 562a05180fSIngo Molnar unsigned long val; 572a05180fSIngo Molnar int cpu = smp_processor_id(); 582a05180fSIngo Molnar 592a05180fSIngo Molnar apic_write(APIC_DFR, APIC_DFR_FLAT); 602a05180fSIngo Molnar val = calculate_ldr(cpu); 612a05180fSIngo Molnar apic_write(APIC_LDR, val); 622a05180fSIngo Molnar } 632a05180fSIngo Molnar 649694cd6cSJiri Slaby static void bigsmp_setup_apic_routing(void) 652a05180fSIngo Molnar { 662a05180fSIngo Molnar printk(KERN_INFO 672a05180fSIngo Molnar "Enabling APIC mode: Physflat. Using %d I/O APICs\n", 682a05180fSIngo Molnar nr_ioapics); 692a05180fSIngo Molnar } 702a05180fSIngo Molnar 719694cd6cSJiri Slaby static int bigsmp_cpu_present_to_apicid(int mps_cpu) 722a05180fSIngo Molnar { 732a05180fSIngo Molnar if (mps_cpu < nr_cpu_ids) 742a05180fSIngo Molnar return (int) per_cpu(x86_bios_cpu_apicid, mps_cpu); 752a05180fSIngo Molnar 762a05180fSIngo Molnar return BAD_APICID; 772a05180fSIngo Molnar } 782a05180fSIngo Molnar 797abc0753SCyrill Gorcunov static void bigsmp_ioapic_phys_id_map(physid_mask_t *phys_map, physid_mask_t *retmap) 802a05180fSIngo Molnar { 812a05180fSIngo Molnar /* For clustered we don't have a good way to do this yet - hack */ 827abc0753SCyrill Gorcunov physids_promote(0xFFL, retmap); 832a05180fSIngo Molnar } 842a05180fSIngo Molnar 85e11dadabSThomas Gleixner static int bigsmp_check_phys_apicid_present(int phys_apicid) 862a05180fSIngo Molnar { 872a05180fSIngo Molnar return 1; 882a05180fSIngo Molnar } 892a05180fSIngo Molnar 909694cd6cSJiri Slaby static int bigsmp_phys_pkg_id(int cpuid_apic, int index_msb) 912a05180fSIngo Molnar { 922a05180fSIngo Molnar return cpuid_apic >> index_msb; 932a05180fSIngo Molnar } 942a05180fSIngo Molnar 959694cd6cSJiri Slaby static void bigsmp_send_IPI_allbutself(int vector) 962a05180fSIngo Molnar { 972a05180fSIngo Molnar default_send_IPI_mask_allbutself_phys(cpu_online_mask, vector); 982a05180fSIngo Molnar } 992a05180fSIngo Molnar 1009694cd6cSJiri Slaby static void bigsmp_send_IPI_all(int vector) 1012a05180fSIngo Molnar { 102500bd02fSThomas Gleixner default_send_IPI_mask_sequence_phys(cpu_online_mask, vector); 1032a05180fSIngo Molnar } 1042a05180fSIngo Molnar 1052a05180fSIngo Molnar static int dmi_bigsmp; /* can be set by dmi scanners */ 1062a05180fSIngo Molnar 1072a05180fSIngo Molnar static int hp_ht_bigsmp(const struct dmi_system_id *d) 1082a05180fSIngo Molnar { 1092a05180fSIngo Molnar printk(KERN_NOTICE "%s detected: force use of apic=bigsmp\n", d->ident); 1102a05180fSIngo Molnar dmi_bigsmp = 1; 1112a05180fSIngo Molnar 1122a05180fSIngo Molnar return 0; 1132a05180fSIngo Molnar } 1142a05180fSIngo Molnar 1152a05180fSIngo Molnar 1162a05180fSIngo Molnar static const struct dmi_system_id bigsmp_dmi_table[] = { 1172a05180fSIngo Molnar { hp_ht_bigsmp, "HP ProLiant DL760 G2", 1182a05180fSIngo Molnar { DMI_MATCH(DMI_BIOS_VENDOR, "HP"), 1192a05180fSIngo Molnar DMI_MATCH(DMI_BIOS_VERSION, "P44-"), 1202a05180fSIngo Molnar } 1212a05180fSIngo Molnar }, 1222a05180fSIngo Molnar 1232a05180fSIngo Molnar { hp_ht_bigsmp, "HP ProLiant DL740", 1242a05180fSIngo Molnar { DMI_MATCH(DMI_BIOS_VENDOR, "HP"), 1252a05180fSIngo Molnar DMI_MATCH(DMI_BIOS_VERSION, "P47-"), 1262a05180fSIngo Molnar } 1272a05180fSIngo Molnar }, 1282a05180fSIngo Molnar { } /* NULL entry stops DMI scanning */ 1292a05180fSIngo Molnar }; 1302a05180fSIngo Molnar 1312a05180fSIngo Molnar static int probe_bigsmp(void) 1322a05180fSIngo Molnar { 1332a05180fSIngo Molnar if (def_to_bigsmp) 1342a05180fSIngo Molnar dmi_bigsmp = 1; 1352a05180fSIngo Molnar else 1362a05180fSIngo Molnar dmi_check_system(bigsmp_dmi_table); 1372a05180fSIngo Molnar 1382a05180fSIngo Molnar return dmi_bigsmp; 1392a05180fSIngo Molnar } 1402a05180fSIngo Molnar 141404f6aacSKees Cook static struct apic apic_bigsmp __ro_after_init = { 1422a05180fSIngo Molnar 1432a05180fSIngo Molnar .name = "bigsmp", 1442a05180fSIngo Molnar .probe = probe_bigsmp, 1452a05180fSIngo Molnar .acpi_madt_oem_check = NULL, 146fa63030eSDaniel J Blueman .apic_id_valid = default_apic_id_valid, 1472a05180fSIngo Molnar .apic_id_registered = bigsmp_apic_id_registered, 1482a05180fSIngo Molnar 1492a05180fSIngo Molnar .irq_delivery_mode = dest_Fixed, 1502a05180fSIngo Molnar /* phys delivery to target CPU: */ 1512a05180fSIngo Molnar .irq_dest_mode = 0, 1522a05180fSIngo Molnar 1532a05180fSIngo Molnar .disable_esr = 1, 1542a05180fSIngo Molnar .dest_logical = 0, 1552a05180fSIngo Molnar .check_apicid_used = bigsmp_check_apicid_used, 1562a05180fSIngo Molnar 1572a05180fSIngo Molnar .init_apic_ldr = bigsmp_init_apic_ldr, 1582a05180fSIngo Molnar 1592a05180fSIngo Molnar .ioapic_phys_id_map = bigsmp_ioapic_phys_id_map, 1602a05180fSIngo Molnar .setup_apic_routing = bigsmp_setup_apic_routing, 1612a05180fSIngo Molnar .cpu_present_to_apicid = bigsmp_cpu_present_to_apicid, 1627abc0753SCyrill Gorcunov .apicid_to_cpu_present = physid_set_mask_of_physid, 1632a05180fSIngo Molnar .check_phys_apicid_present = bigsmp_check_phys_apicid_present, 1642a05180fSIngo Molnar .phys_pkg_id = bigsmp_phys_pkg_id, 1652a05180fSIngo Molnar 1662a05180fSIngo Molnar .get_apic_id = bigsmp_get_apic_id, 1672a05180fSIngo Molnar .set_apic_id = NULL, 1682a05180fSIngo Molnar 1699f9e3bb1SThomas Gleixner .calc_dest_apicid = apic_default_calc_apicid, 1702a05180fSIngo Molnar 1715789a12eSThomas Gleixner .send_IPI = default_send_IPI_single_phys, 172500bd02fSThomas Gleixner .send_IPI_mask = default_send_IPI_mask_sequence_phys, 1732a05180fSIngo Molnar .send_IPI_mask_allbutself = NULL, 1742a05180fSIngo Molnar .send_IPI_allbutself = bigsmp_send_IPI_allbutself, 1752a05180fSIngo Molnar .send_IPI_all = bigsmp_send_IPI_all, 1762a05180fSIngo Molnar .send_IPI_self = default_send_IPI_self, 1772a05180fSIngo Molnar 1782a05180fSIngo Molnar .inquire_remote_apic = default_inquire_remote_apic, 1792a05180fSIngo Molnar 1802a05180fSIngo Molnar .read = native_apic_mem_read, 1812a05180fSIngo Molnar .write = native_apic_mem_write, 1822a43195dSMichael S. Tsirkin .eoi_write = native_apic_mem_write, 1832a05180fSIngo Molnar .icr_read = native_apic_icr_read, 1842a05180fSIngo Molnar .icr_write = native_apic_icr_write, 1852a05180fSIngo Molnar .wait_icr_idle = native_apic_wait_icr_idle, 1862a05180fSIngo Molnar .safe_wait_icr_idle = native_safe_apic_wait_icr_idle, 187acb8bc09STejun Heo 18812bf24a4STejun Heo .x86_32_early_logical_apicid = bigsmp_early_logical_apicid, 1892a05180fSIngo Molnar }; 190107e0e0cSSuresh Siddha 191838312beSJan Beulich void __init generic_bigsmp_probe(void) 19269c252ffSSuresh Siddha { 193838312beSJan Beulich unsigned int cpu; 19469c252ffSSuresh Siddha 195838312beSJan Beulich if (!probe_bigsmp()) 196838312beSJan Beulich return; 197838312beSJan Beulich 198838312beSJan Beulich apic = &apic_bigsmp; 199838312beSJan Beulich 200838312beSJan Beulich for_each_possible_cpu(cpu) { 201838312beSJan Beulich if (early_per_cpu(x86_cpu_to_logical_apicid, 202838312beSJan Beulich cpu) == BAD_APICID) 203838312beSJan Beulich continue; 204838312beSJan Beulich early_per_cpu(x86_cpu_to_logical_apicid, cpu) = 205838312beSJan Beulich bigsmp_early_logical_apicid(cpu); 206838312beSJan Beulich } 207838312beSJan Beulich 208838312beSJan Beulich pr_info("Overriding APIC driver with %s\n", apic_bigsmp.name); 20969c252ffSSuresh Siddha } 21069c252ffSSuresh Siddha 211107e0e0cSSuresh Siddha apic_driver(apic_bigsmp); 212