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189 lines
4.3 KiB
189 lines
4.3 KiB
// SPDX-License-Identifier: GPL-2.0 |
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/* |
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* APIC driver for "bigsmp" xAPIC machines with more than 8 virtual CPUs. |
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* |
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* Drives the local APIC in "clustered mode". |
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*/ |
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#include <linux/cpumask.h> |
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#include <linux/dmi.h> |
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#include <linux/smp.h> |
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#include <asm/apic.h> |
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#include <asm/io_apic.h> |
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#include "local.h" |
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static unsigned bigsmp_get_apic_id(unsigned long x) |
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{ |
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return (x >> 24) & 0xFF; |
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} |
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static int bigsmp_apic_id_registered(void) |
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{ |
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return 1; |
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} |
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static bool bigsmp_check_apicid_used(physid_mask_t *map, int apicid) |
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{ |
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return false; |
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} |
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static int bigsmp_early_logical_apicid(int cpu) |
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{ |
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/* on bigsmp, logical apicid is the same as physical */ |
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return early_per_cpu(x86_cpu_to_apicid, cpu); |
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} |
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/* |
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* bigsmp enables physical destination mode |
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* and doesn't use LDR and DFR |
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*/ |
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static void bigsmp_init_apic_ldr(void) |
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{ |
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} |
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static void bigsmp_setup_apic_routing(void) |
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{ |
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printk(KERN_INFO |
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"Enabling APIC mode: Physflat. Using %d I/O APICs\n", |
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nr_ioapics); |
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} |
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static int bigsmp_cpu_present_to_apicid(int mps_cpu) |
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{ |
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if (mps_cpu < nr_cpu_ids) |
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return (int) per_cpu(x86_bios_cpu_apicid, mps_cpu); |
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return BAD_APICID; |
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} |
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static void bigsmp_ioapic_phys_id_map(physid_mask_t *phys_map, physid_mask_t *retmap) |
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{ |
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/* For clustered we don't have a good way to do this yet - hack */ |
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physids_promote(0xFFL, retmap); |
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} |
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static int bigsmp_check_phys_apicid_present(int phys_apicid) |
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{ |
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return 1; |
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} |
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static int bigsmp_phys_pkg_id(int cpuid_apic, int index_msb) |
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{ |
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return cpuid_apic >> index_msb; |
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} |
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static void bigsmp_send_IPI_allbutself(int vector) |
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{ |
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default_send_IPI_mask_allbutself_phys(cpu_online_mask, vector); |
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} |
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static void bigsmp_send_IPI_all(int vector) |
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{ |
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default_send_IPI_mask_sequence_phys(cpu_online_mask, vector); |
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} |
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static int dmi_bigsmp; /* can be set by dmi scanners */ |
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static int hp_ht_bigsmp(const struct dmi_system_id *d) |
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{ |
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printk(KERN_NOTICE "%s detected: force use of apic=bigsmp\n", d->ident); |
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dmi_bigsmp = 1; |
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return 0; |
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} |
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static const struct dmi_system_id bigsmp_dmi_table[] = { |
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{ hp_ht_bigsmp, "HP ProLiant DL760 G2", |
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{ DMI_MATCH(DMI_BIOS_VENDOR, "HP"), |
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DMI_MATCH(DMI_BIOS_VERSION, "P44-"), |
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} |
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}, |
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{ hp_ht_bigsmp, "HP ProLiant DL740", |
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{ DMI_MATCH(DMI_BIOS_VENDOR, "HP"), |
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DMI_MATCH(DMI_BIOS_VERSION, "P47-"), |
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} |
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}, |
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{ } /* NULL entry stops DMI scanning */ |
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}; |
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static int probe_bigsmp(void) |
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{ |
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if (def_to_bigsmp) |
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dmi_bigsmp = 1; |
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else |
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dmi_check_system(bigsmp_dmi_table); |
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return dmi_bigsmp; |
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} |
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static struct apic apic_bigsmp __ro_after_init = { |
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.name = "bigsmp", |
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.probe = probe_bigsmp, |
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.acpi_madt_oem_check = NULL, |
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.apic_id_valid = default_apic_id_valid, |
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.apic_id_registered = bigsmp_apic_id_registered, |
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.delivery_mode = APIC_DELIVERY_MODE_FIXED, |
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.dest_mode_logical = false, |
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.disable_esr = 1, |
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.check_apicid_used = bigsmp_check_apicid_used, |
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.init_apic_ldr = bigsmp_init_apic_ldr, |
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.ioapic_phys_id_map = bigsmp_ioapic_phys_id_map, |
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.setup_apic_routing = bigsmp_setup_apic_routing, |
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.cpu_present_to_apicid = bigsmp_cpu_present_to_apicid, |
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.apicid_to_cpu_present = physid_set_mask_of_physid, |
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.check_phys_apicid_present = bigsmp_check_phys_apicid_present, |
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.phys_pkg_id = bigsmp_phys_pkg_id, |
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.get_apic_id = bigsmp_get_apic_id, |
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.set_apic_id = NULL, |
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.calc_dest_apicid = apic_default_calc_apicid, |
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.send_IPI = default_send_IPI_single_phys, |
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.send_IPI_mask = default_send_IPI_mask_sequence_phys, |
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.send_IPI_mask_allbutself = NULL, |
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.send_IPI_allbutself = bigsmp_send_IPI_allbutself, |
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.send_IPI_all = bigsmp_send_IPI_all, |
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.send_IPI_self = default_send_IPI_self, |
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.inquire_remote_apic = default_inquire_remote_apic, |
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.read = native_apic_mem_read, |
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.write = native_apic_mem_write, |
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.eoi_write = native_apic_mem_write, |
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.icr_read = native_apic_icr_read, |
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.icr_write = native_apic_icr_write, |
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.wait_icr_idle = native_apic_wait_icr_idle, |
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.safe_wait_icr_idle = native_safe_apic_wait_icr_idle, |
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.x86_32_early_logical_apicid = bigsmp_early_logical_apicid, |
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}; |
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void __init generic_bigsmp_probe(void) |
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{ |
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unsigned int cpu; |
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if (!probe_bigsmp()) |
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return; |
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apic = &apic_bigsmp; |
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for_each_possible_cpu(cpu) { |
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if (early_per_cpu(x86_cpu_to_logical_apicid, |
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cpu) == BAD_APICID) |
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continue; |
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early_per_cpu(x86_cpu_to_logical_apicid, cpu) = |
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bigsmp_early_logical_apicid(cpu); |
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} |
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pr_info("Overriding APIC driver with %s\n", apic_bigsmp.name); |
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} |
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apic_driver(apic_bigsmp);
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