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/threads.h> 82a05180fSIngo Molnar #include <linux/cpumask.h> 92a05180fSIngo Molnar #include <linux/kernel.h> 102a05180fSIngo Molnar #include <linux/init.h> 112a05180fSIngo Molnar #include <linux/dmi.h> 122a05180fSIngo Molnar #include <linux/smp.h> 132a05180fSIngo Molnar 142a05180fSIngo Molnar #include <asm/apicdef.h> 152a05180fSIngo Molnar #include <asm/fixmap.h> 162a05180fSIngo Molnar #include <asm/mpspec.h> 172a05180fSIngo Molnar #include <asm/apic.h> 182a05180fSIngo Molnar #include <asm/ipi.h> 192a05180fSIngo Molnar 209694cd6cSJiri Slaby static unsigned bigsmp_get_apic_id(unsigned long x) 212a05180fSIngo Molnar { 222a05180fSIngo Molnar return (x >> 24) & 0xFF; 232a05180fSIngo Molnar } 242a05180fSIngo Molnar 259694cd6cSJiri Slaby static int bigsmp_apic_id_registered(void) 262a05180fSIngo Molnar { 272a05180fSIngo Molnar return 1; 282a05180fSIngo Molnar } 292a05180fSIngo Molnar 307abc0753SCyrill Gorcunov static unsigned long bigsmp_check_apicid_used(physid_mask_t *map, int apicid) 312a05180fSIngo Molnar { 322a05180fSIngo Molnar return 0; 332a05180fSIngo Molnar } 342a05180fSIngo Molnar 3512bf24a4STejun Heo static int bigsmp_early_logical_apicid(int cpu) 3612bf24a4STejun Heo { 3712bf24a4STejun Heo /* on bigsmp, logical apicid is the same as physical */ 3812bf24a4STejun Heo return early_per_cpu(x86_cpu_to_apicid, cpu); 3912bf24a4STejun Heo } 4012bf24a4STejun Heo 412a05180fSIngo Molnar static inline unsigned long calculate_ldr(int cpu) 422a05180fSIngo Molnar { 432a05180fSIngo Molnar unsigned long val, id; 442a05180fSIngo Molnar 452a05180fSIngo Molnar val = apic_read(APIC_LDR) & ~APIC_LDR_MASK; 462a05180fSIngo Molnar id = per_cpu(x86_bios_cpu_apicid, cpu); 472a05180fSIngo Molnar val |= SET_APIC_LOGICAL_ID(id); 482a05180fSIngo Molnar 492a05180fSIngo Molnar return val; 502a05180fSIngo Molnar } 512a05180fSIngo Molnar 522a05180fSIngo Molnar /* 532a05180fSIngo Molnar * Set up the logical destination ID. 542a05180fSIngo Molnar * 552a05180fSIngo Molnar * Intel recommends to set DFR, LDR and TPR before enabling 562a05180fSIngo Molnar * an APIC. See e.g. "AP-388 82489DX User's Manual" (Intel 572a05180fSIngo Molnar * document number 292116). So here it goes... 582a05180fSIngo Molnar */ 599694cd6cSJiri Slaby static void bigsmp_init_apic_ldr(void) 602a05180fSIngo Molnar { 612a05180fSIngo Molnar unsigned long val; 622a05180fSIngo Molnar int cpu = smp_processor_id(); 632a05180fSIngo Molnar 642a05180fSIngo Molnar apic_write(APIC_DFR, APIC_DFR_FLAT); 652a05180fSIngo Molnar val = calculate_ldr(cpu); 662a05180fSIngo Molnar apic_write(APIC_LDR, val); 672a05180fSIngo Molnar } 682a05180fSIngo Molnar 699694cd6cSJiri Slaby static void bigsmp_setup_apic_routing(void) 702a05180fSIngo Molnar { 712a05180fSIngo Molnar printk(KERN_INFO 722a05180fSIngo Molnar "Enabling APIC mode: Physflat. Using %d I/O APICs\n", 732a05180fSIngo Molnar nr_ioapics); 742a05180fSIngo Molnar } 752a05180fSIngo Molnar 769694cd6cSJiri Slaby static int bigsmp_cpu_present_to_apicid(int mps_cpu) 772a05180fSIngo Molnar { 782a05180fSIngo Molnar if (mps_cpu < nr_cpu_ids) 792a05180fSIngo Molnar return (int) per_cpu(x86_bios_cpu_apicid, mps_cpu); 802a05180fSIngo Molnar 812a05180fSIngo Molnar return BAD_APICID; 822a05180fSIngo Molnar } 832a05180fSIngo Molnar 847abc0753SCyrill Gorcunov static void bigsmp_ioapic_phys_id_map(physid_mask_t *phys_map, physid_mask_t *retmap) 852a05180fSIngo Molnar { 862a05180fSIngo Molnar /* For clustered we don't have a good way to do this yet - hack */ 877abc0753SCyrill Gorcunov physids_promote(0xFFL, retmap); 882a05180fSIngo Molnar } 892a05180fSIngo Molnar 90e11dadabSThomas Gleixner static int bigsmp_check_phys_apicid_present(int phys_apicid) 912a05180fSIngo Molnar { 922a05180fSIngo Molnar return 1; 932a05180fSIngo Molnar } 942a05180fSIngo Molnar 959694cd6cSJiri Slaby static int bigsmp_phys_pkg_id(int cpuid_apic, int index_msb) 962a05180fSIngo Molnar { 972a05180fSIngo Molnar return cpuid_apic >> index_msb; 982a05180fSIngo Molnar } 992a05180fSIngo Molnar 1009694cd6cSJiri Slaby static void bigsmp_send_IPI_allbutself(int vector) 1012a05180fSIngo Molnar { 1022a05180fSIngo Molnar default_send_IPI_mask_allbutself_phys(cpu_online_mask, vector); 1032a05180fSIngo Molnar } 1042a05180fSIngo Molnar 1059694cd6cSJiri Slaby static void bigsmp_send_IPI_all(int vector) 1062a05180fSIngo Molnar { 107500bd02fSThomas Gleixner default_send_IPI_mask_sequence_phys(cpu_online_mask, vector); 1082a05180fSIngo Molnar } 1092a05180fSIngo Molnar 1102a05180fSIngo Molnar static int dmi_bigsmp; /* can be set by dmi scanners */ 1112a05180fSIngo Molnar 1122a05180fSIngo Molnar static int hp_ht_bigsmp(const struct dmi_system_id *d) 1132a05180fSIngo Molnar { 1142a05180fSIngo Molnar printk(KERN_NOTICE "%s detected: force use of apic=bigsmp\n", d->ident); 1152a05180fSIngo Molnar dmi_bigsmp = 1; 1162a05180fSIngo Molnar 1172a05180fSIngo Molnar return 0; 1182a05180fSIngo Molnar } 1192a05180fSIngo Molnar 1202a05180fSIngo Molnar 1212a05180fSIngo Molnar static const struct dmi_system_id bigsmp_dmi_table[] = { 1222a05180fSIngo Molnar { hp_ht_bigsmp, "HP ProLiant DL760 G2", 1232a05180fSIngo Molnar { DMI_MATCH(DMI_BIOS_VENDOR, "HP"), 1242a05180fSIngo Molnar DMI_MATCH(DMI_BIOS_VERSION, "P44-"), 1252a05180fSIngo Molnar } 1262a05180fSIngo Molnar }, 1272a05180fSIngo Molnar 1282a05180fSIngo Molnar { hp_ht_bigsmp, "HP ProLiant DL740", 1292a05180fSIngo Molnar { DMI_MATCH(DMI_BIOS_VENDOR, "HP"), 1302a05180fSIngo Molnar DMI_MATCH(DMI_BIOS_VERSION, "P47-"), 1312a05180fSIngo Molnar } 1322a05180fSIngo Molnar }, 1332a05180fSIngo Molnar { } /* NULL entry stops DMI scanning */ 1342a05180fSIngo Molnar }; 1352a05180fSIngo Molnar 1362a05180fSIngo Molnar static int probe_bigsmp(void) 1372a05180fSIngo Molnar { 1382a05180fSIngo Molnar if (def_to_bigsmp) 1392a05180fSIngo Molnar dmi_bigsmp = 1; 1402a05180fSIngo Molnar else 1412a05180fSIngo Molnar dmi_check_system(bigsmp_dmi_table); 1422a05180fSIngo Molnar 1432a05180fSIngo Molnar return dmi_bigsmp; 1442a05180fSIngo Molnar } 1452a05180fSIngo Molnar 146404f6aacSKees Cook static struct apic apic_bigsmp __ro_after_init = { 1472a05180fSIngo Molnar 1482a05180fSIngo Molnar .name = "bigsmp", 1492a05180fSIngo Molnar .probe = probe_bigsmp, 1502a05180fSIngo Molnar .acpi_madt_oem_check = NULL, 151fa63030eSDaniel J Blueman .apic_id_valid = default_apic_id_valid, 1522a05180fSIngo Molnar .apic_id_registered = bigsmp_apic_id_registered, 1532a05180fSIngo Molnar 1542a05180fSIngo Molnar .irq_delivery_mode = dest_Fixed, 1552a05180fSIngo Molnar /* phys delivery to target CPU: */ 1562a05180fSIngo Molnar .irq_dest_mode = 0, 1572a05180fSIngo Molnar 158bf721d3aSAlexander Gordeev .target_cpus = default_target_cpus, 1592a05180fSIngo Molnar .disable_esr = 1, 1602a05180fSIngo Molnar .dest_logical = 0, 1612a05180fSIngo Molnar .check_apicid_used = bigsmp_check_apicid_used, 1622a05180fSIngo Molnar 1639d8e1066SAlexander Gordeev .vector_allocation_domain = default_vector_allocation_domain, 1642a05180fSIngo Molnar .init_apic_ldr = bigsmp_init_apic_ldr, 1652a05180fSIngo Molnar 1662a05180fSIngo Molnar .ioapic_phys_id_map = bigsmp_ioapic_phys_id_map, 1672a05180fSIngo Molnar .setup_apic_routing = bigsmp_setup_apic_routing, 1682a05180fSIngo Molnar .cpu_present_to_apicid = bigsmp_cpu_present_to_apicid, 1697abc0753SCyrill Gorcunov .apicid_to_cpu_present = physid_set_mask_of_physid, 1702a05180fSIngo Molnar .check_phys_apicid_present = bigsmp_check_phys_apicid_present, 1712a05180fSIngo Molnar .phys_pkg_id = bigsmp_phys_pkg_id, 1722a05180fSIngo Molnar 1732a05180fSIngo Molnar .get_apic_id = bigsmp_get_apic_id, 1742a05180fSIngo Molnar .set_apic_id = NULL, 1752a05180fSIngo Molnar 17691cd9cb7SThomas Gleixner .cpu_mask_to_apicid = default_cpu_mask_to_apicid, 1772a05180fSIngo Molnar 1785789a12eSThomas Gleixner .send_IPI = default_send_IPI_single_phys, 179500bd02fSThomas Gleixner .send_IPI_mask = default_send_IPI_mask_sequence_phys, 1802a05180fSIngo Molnar .send_IPI_mask_allbutself = NULL, 1812a05180fSIngo Molnar .send_IPI_allbutself = bigsmp_send_IPI_allbutself, 1822a05180fSIngo Molnar .send_IPI_all = bigsmp_send_IPI_all, 1832a05180fSIngo Molnar .send_IPI_self = default_send_IPI_self, 1842a05180fSIngo Molnar 1852a05180fSIngo Molnar .inquire_remote_apic = default_inquire_remote_apic, 1862a05180fSIngo Molnar 1872a05180fSIngo Molnar .read = native_apic_mem_read, 1882a05180fSIngo Molnar .write = native_apic_mem_write, 1892a43195dSMichael S. Tsirkin .eoi_write = native_apic_mem_write, 1902a05180fSIngo Molnar .icr_read = native_apic_icr_read, 1912a05180fSIngo Molnar .icr_write = native_apic_icr_write, 1922a05180fSIngo Molnar .wait_icr_idle = native_apic_wait_icr_idle, 1932a05180fSIngo Molnar .safe_wait_icr_idle = native_safe_apic_wait_icr_idle, 194acb8bc09STejun Heo 19512bf24a4STejun Heo .x86_32_early_logical_apicid = bigsmp_early_logical_apicid, 1962a05180fSIngo Molnar }; 197107e0e0cSSuresh Siddha 198838312beSJan Beulich void __init generic_bigsmp_probe(void) 19969c252ffSSuresh Siddha { 200838312beSJan Beulich unsigned int cpu; 20169c252ffSSuresh Siddha 202838312beSJan Beulich if (!probe_bigsmp()) 203838312beSJan Beulich return; 204838312beSJan Beulich 205838312beSJan Beulich apic = &apic_bigsmp; 206838312beSJan Beulich 207838312beSJan Beulich for_each_possible_cpu(cpu) { 208838312beSJan Beulich if (early_per_cpu(x86_cpu_to_logical_apicid, 209838312beSJan Beulich cpu) == BAD_APICID) 210838312beSJan Beulich continue; 211838312beSJan Beulich early_per_cpu(x86_cpu_to_logical_apicid, cpu) = 212838312beSJan Beulich bigsmp_early_logical_apicid(cpu); 213838312beSJan Beulich } 214838312beSJan Beulich 215838312beSJan Beulich pr_info("Overriding APIC driver with %s\n", apic_bigsmp.name); 21669c252ffSSuresh Siddha } 21769c252ffSSuresh Siddha 218107e0e0cSSuresh Siddha apic_driver(apic_bigsmp); 219