1// SPDX-License-Identifier: GPL-2.0
  2/*
  3 * APIC driver for "bigsmp" xAPIC machines with more than 8 virtual CPUs.
  4 *
  5 * Drives the local APIC in "clustered mode".
  6 */
 
  7#include <linux/cpumask.h>
 
 
  8#include <linux/dmi.h>
  9#include <linux/smp.h>
 10
 
 
 
 11#include <asm/apic.h>
 12
 13#include "local.h"
 14
 15static unsigned bigsmp_get_apic_id(unsigned long x)
 16{
 17	return (x >> 24) & 0xFF;
 18}
 19
 20static int bigsmp_apic_id_registered(void)
 21{
 22	return 1;
 23}
 24
 25static bool bigsmp_check_apicid_used(physid_mask_t *map, int apicid)
 26{
 27	return false;
 
 
 
 
 
 28}
 29
 30static int bigsmp_early_logical_apicid(int cpu)
 31{
 32	/* on bigsmp, logical apicid is the same as physical */
 33	return early_per_cpu(x86_cpu_to_apicid, cpu);
 34}
 35
 
 
 
 
 
 
 
 
 
 
 
 36/*
 37 * bigsmp enables physical destination mode
 38 * and doesn't use LDR and DFR
 
 
 
 39 */
 40static void bigsmp_init_apic_ldr(void)
 41{
 
 
 
 
 
 
 42}
 43
 44static void bigsmp_setup_apic_routing(void)
 45{
 46	printk(KERN_INFO
 47		"Enabling APIC mode:  Physflat.  Using %d I/O APICs\n",
 48		nr_ioapics);
 49}
 50
 51static int bigsmp_cpu_present_to_apicid(int mps_cpu)
 52{
 53	if (mps_cpu < nr_cpu_ids)
 54		return (int) per_cpu(x86_bios_cpu_apicid, mps_cpu);
 55
 56	return BAD_APICID;
 57}
 58
 59static void bigsmp_ioapic_phys_id_map(physid_mask_t *phys_map, physid_mask_t *retmap)
 60{
 61	/* For clustered we don't have a good way to do this yet - hack */
 62	physids_promote(0xFFL, retmap);
 63}
 64
 65static int bigsmp_check_phys_apicid_present(int phys_apicid)
 66{
 67	return 1;
 68}
 69
 70static int bigsmp_phys_pkg_id(int cpuid_apic, int index_msb)
 71{
 72	return cpuid_apic >> index_msb;
 73}
 74
 
 
 
 
 
 75static void bigsmp_send_IPI_allbutself(int vector)
 76{
 77	default_send_IPI_mask_allbutself_phys(cpu_online_mask, vector);
 78}
 79
 80static void bigsmp_send_IPI_all(int vector)
 81{
 82	default_send_IPI_mask_sequence_phys(cpu_online_mask, vector);
 83}
 84
 85static int dmi_bigsmp; /* can be set by dmi scanners */
 86
 87static int hp_ht_bigsmp(const struct dmi_system_id *d)
 88{
 89	printk(KERN_NOTICE "%s detected: force use of apic=bigsmp\n", d->ident);
 90	dmi_bigsmp = 1;
 91
 92	return 0;
 93}
 94
 95
 96static const struct dmi_system_id bigsmp_dmi_table[] = {
 97	{ hp_ht_bigsmp, "HP ProLiant DL760 G2",
 98		{	DMI_MATCH(DMI_BIOS_VENDOR, "HP"),
 99			DMI_MATCH(DMI_BIOS_VERSION, "P44-"),
100		}
101	},
102
103	{ hp_ht_bigsmp, "HP ProLiant DL740",
104		{	DMI_MATCH(DMI_BIOS_VENDOR, "HP"),
105			DMI_MATCH(DMI_BIOS_VERSION, "P47-"),
106		}
107	},
108	{ } /* NULL entry stops DMI scanning */
109};
110
111static int probe_bigsmp(void)
112{
113	if (def_to_bigsmp)
114		dmi_bigsmp = 1;
115	else
116		dmi_check_system(bigsmp_dmi_table);
117
118	return dmi_bigsmp;
119}
120
121static struct apic apic_bigsmp __ro_after_init = {
122
123	.name				= "bigsmp",
124	.probe				= probe_bigsmp,
125	.acpi_madt_oem_check		= NULL,
126	.apic_id_valid			= default_apic_id_valid,
127	.apic_id_registered		= bigsmp_apic_id_registered,
128
129	.irq_delivery_mode		= dest_Fixed,
130	/* phys delivery to target CPU: */
131	.irq_dest_mode			= 0,
132
 
133	.disable_esr			= 1,
134	.dest_logical			= 0,
135	.check_apicid_used		= bigsmp_check_apicid_used,
 
136
 
137	.init_apic_ldr			= bigsmp_init_apic_ldr,
138
139	.ioapic_phys_id_map		= bigsmp_ioapic_phys_id_map,
140	.setup_apic_routing		= bigsmp_setup_apic_routing,
 
141	.cpu_present_to_apicid		= bigsmp_cpu_present_to_apicid,
142	.apicid_to_cpu_present		= physid_set_mask_of_physid,
 
143	.check_phys_apicid_present	= bigsmp_check_phys_apicid_present,
 
144	.phys_pkg_id			= bigsmp_phys_pkg_id,
 
145
146	.get_apic_id			= bigsmp_get_apic_id,
147	.set_apic_id			= NULL,
 
148
149	.calc_dest_apicid		= apic_default_calc_apicid,
150
151	.send_IPI			= default_send_IPI_single_phys,
152	.send_IPI_mask			= default_send_IPI_mask_sequence_phys,
153	.send_IPI_mask_allbutself	= NULL,
154	.send_IPI_allbutself		= bigsmp_send_IPI_allbutself,
155	.send_IPI_all			= bigsmp_send_IPI_all,
156	.send_IPI_self			= default_send_IPI_self,
157
 
 
 
 
 
158	.inquire_remote_apic		= default_inquire_remote_apic,
159
160	.read				= native_apic_mem_read,
161	.write				= native_apic_mem_write,
162	.eoi_write			= native_apic_mem_write,
163	.icr_read			= native_apic_icr_read,
164	.icr_write			= native_apic_icr_write,
165	.wait_icr_idle			= native_apic_wait_icr_idle,
166	.safe_wait_icr_idle		= native_safe_apic_wait_icr_idle,
167
168	.x86_32_early_logical_apicid	= bigsmp_early_logical_apicid,
169};
170
171void __init generic_bigsmp_probe(void)
172{
173	unsigned int cpu;
174
175	if (!probe_bigsmp())
176		return;
177
178	apic = &apic_bigsmp;
179
180	for_each_possible_cpu(cpu) {
181		if (early_per_cpu(x86_cpu_to_logical_apicid,
182				  cpu) == BAD_APICID)
183			continue;
184		early_per_cpu(x86_cpu_to_logical_apicid, cpu) =
185			bigsmp_early_logical_apicid(cpu);
186	}
187
188	pr_info("Overriding APIC driver with %s\n", apic_bigsmp.name);
189}
190
191apic_driver(apic_bigsmp);

 
  1/*
  2 * APIC driver for "bigsmp" xAPIC machines with more than 8 virtual CPUs.
  3 *
  4 * Drives the local APIC in "clustered mode".
  5 */
  6#include <linux/threads.h>
  7#include <linux/cpumask.h>
  8#include <linux/kernel.h>
  9#include <linux/init.h>
 10#include <linux/dmi.h>
 11#include <linux/smp.h>
 12
 13#include <asm/apicdef.h>
 14#include <asm/fixmap.h>
 15#include <asm/mpspec.h>
 16#include <asm/apic.h>
 17#include <asm/ipi.h>
 
 18
 19static unsigned bigsmp_get_apic_id(unsigned long x)
 20{
 21	return (x >> 24) & 0xFF;
 22}
 23
 24static int bigsmp_apic_id_registered(void)
 25{
 26	return 1;
 27}
 28
 29static unsigned long bigsmp_check_apicid_used(physid_mask_t *map, int apicid)
 30{
 31	return 0;
 32}
 33
 34static unsigned long bigsmp_check_apicid_present(int bit)
 35{
 36	return 1;
 37}
 38
 39static int bigsmp_early_logical_apicid(int cpu)
 40{
 41	/* on bigsmp, logical apicid is the same as physical */
 42	return early_per_cpu(x86_cpu_to_apicid, cpu);
 43}
 44
 45static inline unsigned long calculate_ldr(int cpu)
 46{
 47	unsigned long val, id;
 48
 49	val = apic_read(APIC_LDR) & ~APIC_LDR_MASK;
 50	id = per_cpu(x86_bios_cpu_apicid, cpu);
 51	val |= SET_APIC_LOGICAL_ID(id);
 52
 53	return val;
 54}
 55
 56/*
 57 * Set up the logical destination ID.
 58 *
 59 * Intel recommends to set DFR, LDR and TPR before enabling
 60 * an APIC.  See e.g. "AP-388 82489DX User's Manual" (Intel
 61 * document number 292116).  So here it goes...
 62 */
 63static void bigsmp_init_apic_ldr(void)
 64{
 65	unsigned long val;
 66	int cpu = smp_processor_id();
 67
 68	apic_write(APIC_DFR, APIC_DFR_FLAT);
 69	val = calculate_ldr(cpu);
 70	apic_write(APIC_LDR, val);
 71}
 72
 73static void bigsmp_setup_apic_routing(void)
 74{
 75	printk(KERN_INFO
 76		"Enabling APIC mode:  Physflat.  Using %d I/O APICs\n",
 77		nr_ioapics);
 78}
 79
 80static int bigsmp_cpu_present_to_apicid(int mps_cpu)
 81{
 82	if (mps_cpu < nr_cpu_ids)
 83		return (int) per_cpu(x86_bios_cpu_apicid, mps_cpu);
 84
 85	return BAD_APICID;
 86}
 87
 88static void bigsmp_ioapic_phys_id_map(physid_mask_t *phys_map, physid_mask_t *retmap)
 89{
 90	/* For clustered we don't have a good way to do this yet - hack */
 91	physids_promote(0xFFL, retmap);
 92}
 93
 94static int bigsmp_check_phys_apicid_present(int phys_apicid)
 95{
 96	return 1;
 97}
 98
 99static int bigsmp_phys_pkg_id(int cpuid_apic, int index_msb)
100{
101	return cpuid_apic >> index_msb;
102}
103
104static inline void bigsmp_send_IPI_mask(const struct cpumask *mask, int vector)
105{
106	default_send_IPI_mask_sequence_phys(mask, vector);
107}
108
109static void bigsmp_send_IPI_allbutself(int vector)
110{
111	default_send_IPI_mask_allbutself_phys(cpu_online_mask, vector);
112}
113
114static void bigsmp_send_IPI_all(int vector)
115{
116	bigsmp_send_IPI_mask(cpu_online_mask, vector);
117}
118
119static int dmi_bigsmp; /* can be set by dmi scanners */
120
121static int hp_ht_bigsmp(const struct dmi_system_id *d)
122{
123	printk(KERN_NOTICE "%s detected: force use of apic=bigsmp\n", d->ident);
124	dmi_bigsmp = 1;
125
126	return 0;
127}
128
129
130static const struct dmi_system_id bigsmp_dmi_table[] = {
131	{ hp_ht_bigsmp, "HP ProLiant DL760 G2",
132		{	DMI_MATCH(DMI_BIOS_VENDOR, "HP"),
133			DMI_MATCH(DMI_BIOS_VERSION, "P44-"),
134		}
135	},
136
137	{ hp_ht_bigsmp, "HP ProLiant DL740",
138		{	DMI_MATCH(DMI_BIOS_VENDOR, "HP"),
139			DMI_MATCH(DMI_BIOS_VERSION, "P47-"),
140		}
141	},
142	{ } /* NULL entry stops DMI scanning */
143};
144
145static int probe_bigsmp(void)
146{
147	if (def_to_bigsmp)
148		dmi_bigsmp = 1;
149	else
150		dmi_check_system(bigsmp_dmi_table);
151
152	return dmi_bigsmp;
153}
154
155static struct apic apic_bigsmp = {
156
157	.name				= "bigsmp",
158	.probe				= probe_bigsmp,
159	.acpi_madt_oem_check		= NULL,
160	.apic_id_valid			= default_apic_id_valid,
161	.apic_id_registered		= bigsmp_apic_id_registered,
162
163	.irq_delivery_mode		= dest_Fixed,
164	/* phys delivery to target CPU: */
165	.irq_dest_mode			= 0,
166
167	.target_cpus			= default_target_cpus,
168	.disable_esr			= 1,
169	.dest_logical			= 0,
170	.check_apicid_used		= bigsmp_check_apicid_used,
171	.check_apicid_present		= bigsmp_check_apicid_present,
172
173	.vector_allocation_domain	= default_vector_allocation_domain,
174	.init_apic_ldr			= bigsmp_init_apic_ldr,
175
176	.ioapic_phys_id_map		= bigsmp_ioapic_phys_id_map,
177	.setup_apic_routing		= bigsmp_setup_apic_routing,
178	.multi_timer_check		= NULL,
179	.cpu_present_to_apicid		= bigsmp_cpu_present_to_apicid,
180	.apicid_to_cpu_present		= physid_set_mask_of_physid,
181	.setup_portio_remap		= NULL,
182	.check_phys_apicid_present	= bigsmp_check_phys_apicid_present,
183	.enable_apic_mode		= NULL,
184	.phys_pkg_id			= bigsmp_phys_pkg_id,
185	.mps_oem_check			= NULL,
186
187	.get_apic_id			= bigsmp_get_apic_id,
188	.set_apic_id			= NULL,
189	.apic_id_mask			= 0xFF << 24,
190
191	.cpu_mask_to_apicid_and		= default_cpu_mask_to_apicid_and,
192
193	.send_IPI_mask			= bigsmp_send_IPI_mask,
 
194	.send_IPI_mask_allbutself	= NULL,
195	.send_IPI_allbutself		= bigsmp_send_IPI_allbutself,
196	.send_IPI_all			= bigsmp_send_IPI_all,
197	.send_IPI_self			= default_send_IPI_self,
198
199	.trampoline_phys_low		= DEFAULT_TRAMPOLINE_PHYS_LOW,
200	.trampoline_phys_high		= DEFAULT_TRAMPOLINE_PHYS_HIGH,
201
202	.wait_for_init_deassert		= true,
203	.smp_callin_clear_local_apic	= NULL,
204	.inquire_remote_apic		= default_inquire_remote_apic,
205
206	.read				= native_apic_mem_read,
207	.write				= native_apic_mem_write,
208	.eoi_write			= native_apic_mem_write,
209	.icr_read			= native_apic_icr_read,
210	.icr_write			= native_apic_icr_write,
211	.wait_icr_idle			= native_apic_wait_icr_idle,
212	.safe_wait_icr_idle		= native_safe_apic_wait_icr_idle,
213
214	.x86_32_early_logical_apicid	= bigsmp_early_logical_apicid,
215};
216
217void __init generic_bigsmp_probe(void)
218{
219	unsigned int cpu;
220
221	if (!probe_bigsmp())
222		return;
223
224	apic = &apic_bigsmp;
225
226	for_each_possible_cpu(cpu) {
227		if (early_per_cpu(x86_cpu_to_logical_apicid,
228				  cpu) == BAD_APICID)
229			continue;
230		early_per_cpu(x86_cpu_to_logical_apicid, cpu) =
231			bigsmp_early_logical_apicid(cpu);
232	}
233
234	pr_info("Overriding APIC driver with %s\n", apic_bigsmp.name);
235}
236
237apic_driver(apic_bigsmp);