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> 1213c01139SIngo Molnar #include <asm/io_apic.h> 138b542da3SThomas Gleixner 14c94f0718SThomas Gleixner #include "local.h" 152a05180fSIngo Molnar 169694cd6cSJiri Slaby static unsigned bigsmp_get_apic_id(unsigned long x) 172a05180fSIngo Molnar { 182a05180fSIngo Molnar return (x >> 24) & 0xFF; 192a05180fSIngo Molnar } 202a05180fSIngo Molnar 219694cd6cSJiri Slaby static int bigsmp_apic_id_registered(void) 222a05180fSIngo Molnar { 232a05180fSIngo Molnar return 1; 242a05180fSIngo Molnar } 252a05180fSIngo Molnar 2657e0aa44SThomas Gleixner static bool bigsmp_check_apicid_used(physid_mask_t *map, int apicid) 272a05180fSIngo Molnar { 2857e0aa44SThomas Gleixner return false; 292a05180fSIngo Molnar } 302a05180fSIngo Molnar 312a05180fSIngo Molnar /* 32bae3a8d3SBandan Das * bigsmp enables physical destination mode 33bae3a8d3SBandan Das * and doesn't use LDR and DFR 342a05180fSIngo Molnar */ 359694cd6cSJiri Slaby static void bigsmp_init_apic_ldr(void) 362a05180fSIngo Molnar { 372a05180fSIngo Molnar } 382a05180fSIngo Molnar 399694cd6cSJiri Slaby static void bigsmp_setup_apic_routing(void) 402a05180fSIngo Molnar { 412a05180fSIngo Molnar printk(KERN_INFO 422a05180fSIngo Molnar "Enabling APIC mode: Physflat. Using %d I/O APICs\n", 432a05180fSIngo Molnar nr_ioapics); 442a05180fSIngo Molnar } 452a05180fSIngo Molnar 467abc0753SCyrill Gorcunov static void bigsmp_ioapic_phys_id_map(physid_mask_t *phys_map, physid_mask_t *retmap) 472a05180fSIngo Molnar { 482a05180fSIngo Molnar /* For clustered we don't have a good way to do this yet - hack */ 497abc0753SCyrill Gorcunov physids_promote(0xFFL, retmap); 502a05180fSIngo Molnar } 512a05180fSIngo Molnar 529694cd6cSJiri Slaby static int bigsmp_phys_pkg_id(int cpuid_apic, int index_msb) 532a05180fSIngo Molnar { 542a05180fSIngo Molnar return cpuid_apic >> index_msb; 552a05180fSIngo Molnar } 562a05180fSIngo Molnar 579694cd6cSJiri Slaby static void bigsmp_send_IPI_allbutself(int vector) 582a05180fSIngo Molnar { 592a05180fSIngo Molnar default_send_IPI_mask_allbutself_phys(cpu_online_mask, vector); 602a05180fSIngo Molnar } 612a05180fSIngo Molnar 629694cd6cSJiri Slaby static void bigsmp_send_IPI_all(int vector) 632a05180fSIngo Molnar { 64500bd02fSThomas Gleixner default_send_IPI_mask_sequence_phys(cpu_online_mask, vector); 652a05180fSIngo Molnar } 662a05180fSIngo Molnar 672a05180fSIngo Molnar static int dmi_bigsmp; /* can be set by dmi scanners */ 682a05180fSIngo Molnar 692a05180fSIngo Molnar static int hp_ht_bigsmp(const struct dmi_system_id *d) 702a05180fSIngo Molnar { 712a05180fSIngo Molnar printk(KERN_NOTICE "%s detected: force use of apic=bigsmp\n", d->ident); 722a05180fSIngo Molnar dmi_bigsmp = 1; 732a05180fSIngo Molnar 742a05180fSIngo Molnar return 0; 752a05180fSIngo Molnar } 762a05180fSIngo Molnar 772a05180fSIngo Molnar 782a05180fSIngo Molnar static const struct dmi_system_id bigsmp_dmi_table[] = { 792a05180fSIngo Molnar { hp_ht_bigsmp, "HP ProLiant DL760 G2", 802a05180fSIngo Molnar { DMI_MATCH(DMI_BIOS_VENDOR, "HP"), 812a05180fSIngo Molnar DMI_MATCH(DMI_BIOS_VERSION, "P44-"), 822a05180fSIngo Molnar } 832a05180fSIngo Molnar }, 842a05180fSIngo Molnar 852a05180fSIngo Molnar { hp_ht_bigsmp, "HP ProLiant DL740", 862a05180fSIngo Molnar { DMI_MATCH(DMI_BIOS_VENDOR, "HP"), 872a05180fSIngo Molnar DMI_MATCH(DMI_BIOS_VERSION, "P47-"), 882a05180fSIngo Molnar } 892a05180fSIngo Molnar }, 902a05180fSIngo Molnar { } /* NULL entry stops DMI scanning */ 912a05180fSIngo Molnar }; 922a05180fSIngo Molnar 932a05180fSIngo Molnar static int probe_bigsmp(void) 942a05180fSIngo Molnar { 9579c9a17cSThomas Gleixner return dmi_check_system(bigsmp_dmi_table); 962a05180fSIngo Molnar } 972a05180fSIngo Molnar 98404f6aacSKees Cook static struct apic apic_bigsmp __ro_after_init = { 992a05180fSIngo Molnar 1002a05180fSIngo Molnar .name = "bigsmp", 1012a05180fSIngo Molnar .probe = probe_bigsmp, 102fa63030eSDaniel J Blueman .apic_id_valid = default_apic_id_valid, 1032a05180fSIngo Molnar .apic_id_registered = bigsmp_apic_id_registered, 1042a05180fSIngo Molnar 10572161299SThomas Gleixner .delivery_mode = APIC_DELIVERY_MODE_FIXED, 1068c44963bSThomas Gleixner .dest_mode_logical = false, 1072a05180fSIngo Molnar 1082a05180fSIngo Molnar .disable_esr = 1, 109e57d04e5SThomas Gleixner 1102a05180fSIngo Molnar .check_apicid_used = bigsmp_check_apicid_used, 1112a05180fSIngo Molnar .init_apic_ldr = bigsmp_init_apic_ldr, 1122a05180fSIngo Molnar .ioapic_phys_id_map = bigsmp_ioapic_phys_id_map, 1132a05180fSIngo Molnar .setup_apic_routing = bigsmp_setup_apic_routing, 114*4114e168SThomas Gleixner .cpu_present_to_apicid = default_cpu_present_to_apicid, 1157abc0753SCyrill Gorcunov .apicid_to_cpu_present = physid_set_mask_of_physid, 1162a05180fSIngo Molnar .phys_pkg_id = bigsmp_phys_pkg_id, 1172a05180fSIngo Molnar 1182a05180fSIngo Molnar .get_apic_id = bigsmp_get_apic_id, 1192a05180fSIngo Molnar .set_apic_id = NULL, 1202a05180fSIngo Molnar 1219f9e3bb1SThomas Gleixner .calc_dest_apicid = apic_default_calc_apicid, 1222a05180fSIngo Molnar 1235789a12eSThomas Gleixner .send_IPI = default_send_IPI_single_phys, 124500bd02fSThomas Gleixner .send_IPI_mask = default_send_IPI_mask_sequence_phys, 1252a05180fSIngo Molnar .send_IPI_mask_allbutself = NULL, 1262a05180fSIngo Molnar .send_IPI_allbutself = bigsmp_send_IPI_allbutself, 1272a05180fSIngo Molnar .send_IPI_all = bigsmp_send_IPI_all, 1282a05180fSIngo Molnar .send_IPI_self = default_send_IPI_self, 1292a05180fSIngo Molnar 1302a05180fSIngo Molnar .read = native_apic_mem_read, 1312a05180fSIngo Molnar .write = native_apic_mem_write, 1322a43195dSMichael S. Tsirkin .eoi_write = native_apic_mem_write, 1332a05180fSIngo Molnar .icr_read = native_apic_icr_read, 1342a05180fSIngo Molnar .icr_write = native_apic_icr_write, 1352a05180fSIngo Molnar .wait_icr_idle = native_apic_wait_icr_idle, 1362a05180fSIngo Molnar .safe_wait_icr_idle = native_safe_apic_wait_icr_idle, 1372a05180fSIngo Molnar }; 138107e0e0cSSuresh Siddha 13979c9a17cSThomas Gleixner bool __init apic_bigsmp_possible(bool cmdline_override) 14069c252ffSSuresh Siddha { 14179c9a17cSThomas Gleixner return apic == &apic_bigsmp || !cmdline_override; 14279c9a17cSThomas Gleixner } 143838312beSJan Beulich 14479c9a17cSThomas Gleixner void __init apic_bigsmp_force(void) 14579c9a17cSThomas Gleixner { 14679c9a17cSThomas Gleixner if (apic != &apic_bigsmp) { 147838312beSJan Beulich apic = &apic_bigsmp; 14879c9a17cSThomas Gleixner pr_info("Overriding APIC driver with bigsmp\n"); 14979c9a17cSThomas Gleixner } 15069c252ffSSuresh Siddha } 15169c252ffSSuresh Siddha 152107e0e0cSSuresh Siddha apic_driver(apic_bigsmp); 153