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 const struct cpumask *bigsmp_target_cpus(void)
 30{
 31#ifdef CONFIG_SMP
 32	return cpu_online_mask;
 33#else
 34	return cpumask_of(0);
 35#endif
 36}
 37
 38static unsigned long bigsmp_check_apicid_used(physid_mask_t *map, int apicid)
 39{
 40	return 0;
 41}
 42
 43static unsigned long bigsmp_check_apicid_present(int bit)
 44{
 45	return 1;
 46}
 47
 48static int bigsmp_early_logical_apicid(int cpu)
 49{
 50	/* on bigsmp, logical apicid is the same as physical */
 51	return early_per_cpu(x86_cpu_to_apicid, cpu);
 52}
 53
 54static inline unsigned long calculate_ldr(int cpu)
 55{
 56	unsigned long val, id;
 57
 58	val = apic_read(APIC_LDR) & ~APIC_LDR_MASK;
 59	id = per_cpu(x86_bios_cpu_apicid, cpu);
 60	val |= SET_APIC_LOGICAL_ID(id);
 61
 62	return val;
 63}
 64
 65/*
 66 * Set up the logical destination ID.
 67 *
 68 * Intel recommends to set DFR, LDR and TPR before enabling
 69 * an APIC.  See e.g. "AP-388 82489DX User's Manual" (Intel
 70 * document number 292116).  So here it goes...
 71 */
 72static void bigsmp_init_apic_ldr(void)
 73{
 74	unsigned long val;
 75	int cpu = smp_processor_id();
 76
 77	apic_write(APIC_DFR, APIC_DFR_FLAT);
 78	val = calculate_ldr(cpu);
 79	apic_write(APIC_LDR, val);
 80}
 81
 82static void bigsmp_setup_apic_routing(void)
 83{
 84	printk(KERN_INFO
 85		"Enabling APIC mode:  Physflat.  Using %d I/O APICs\n",
 86		nr_ioapics);
 87}
 88
 89static int bigsmp_cpu_present_to_apicid(int mps_cpu)
 90{
 91	if (mps_cpu < nr_cpu_ids)
 92		return (int) per_cpu(x86_bios_cpu_apicid, mps_cpu);
 93
 94	return BAD_APICID;
 95}
 96
 97static void bigsmp_ioapic_phys_id_map(physid_mask_t *phys_map, physid_mask_t *retmap)
 98{
 99	/* For clustered we don't have a good way to do this yet - hack */
100	physids_promote(0xFFL, retmap);
101}
102
103static int bigsmp_check_phys_apicid_present(int phys_apicid)
104{
105	return 1;
106}
107
108/* As we are using single CPU as destination, pick only one CPU here */
109static unsigned int bigsmp_cpu_mask_to_apicid(const struct cpumask *cpumask)
110{
111	int cpu = cpumask_first(cpumask);
112
113	if (cpu < nr_cpu_ids)
114		return cpu_physical_id(cpu);
115	return BAD_APICID;
116}
117
118static unsigned int bigsmp_cpu_mask_to_apicid_and(const struct cpumask *cpumask,
119			      const struct cpumask *andmask)
120{
121	int cpu;
122
123	/*
124	 * We're using fixed IRQ delivery, can only return one phys APIC ID.
125	 * May as well be the first.
126	 */
127	for_each_cpu_and(cpu, cpumask, andmask) {
128		if (cpumask_test_cpu(cpu, cpu_online_mask))
129			return cpu_physical_id(cpu);
130	}
131	return BAD_APICID;
132}
133
134static int bigsmp_phys_pkg_id(int cpuid_apic, int index_msb)
135{
136	return cpuid_apic >> index_msb;
137}
138
139static inline void bigsmp_send_IPI_mask(const struct cpumask *mask, int vector)
140{
141	default_send_IPI_mask_sequence_phys(mask, vector);
142}
143
144static void bigsmp_send_IPI_allbutself(int vector)
145{
146	default_send_IPI_mask_allbutself_phys(cpu_online_mask, vector);
147}
148
149static void bigsmp_send_IPI_all(int vector)
150{
151	bigsmp_send_IPI_mask(cpu_online_mask, vector);
152}
153
154static int dmi_bigsmp; /* can be set by dmi scanners */
155
156static int hp_ht_bigsmp(const struct dmi_system_id *d)
157{
158	printk(KERN_NOTICE "%s detected: force use of apic=bigsmp\n", d->ident);
159	dmi_bigsmp = 1;
160
161	return 0;
162}
163
164
165static const struct dmi_system_id bigsmp_dmi_table[] = {
166	{ hp_ht_bigsmp, "HP ProLiant DL760 G2",
167		{	DMI_MATCH(DMI_BIOS_VENDOR, "HP"),
168			DMI_MATCH(DMI_BIOS_VERSION, "P44-"),
169		}
170	},
171
172	{ hp_ht_bigsmp, "HP ProLiant DL740",
173		{	DMI_MATCH(DMI_BIOS_VENDOR, "HP"),
174			DMI_MATCH(DMI_BIOS_VERSION, "P47-"),
175		}
176	},
177	{ } /* NULL entry stops DMI scanning */
178};
179
180static void bigsmp_vector_allocation_domain(int cpu, struct cpumask *retmask)
181{
182	cpumask_clear(retmask);
183	cpumask_set_cpu(cpu, retmask);
184}
185
186static int probe_bigsmp(void)
187{
188	if (def_to_bigsmp)
189		dmi_bigsmp = 1;
190	else
191		dmi_check_system(bigsmp_dmi_table);
192
193	return dmi_bigsmp;
194}
195
196static struct apic apic_bigsmp = {
197
198	.name				= "bigsmp",
199	.probe				= probe_bigsmp,
200	.acpi_madt_oem_check		= NULL,
201	.apic_id_valid			= default_apic_id_valid,
202	.apic_id_registered		= bigsmp_apic_id_registered,
203
204	.irq_delivery_mode		= dest_Fixed,
205	/* phys delivery to target CPU: */
206	.irq_dest_mode			= 0,
207
208	.target_cpus			= bigsmp_target_cpus,
209	.disable_esr			= 1,
210	.dest_logical			= 0,
211	.check_apicid_used		= bigsmp_check_apicid_used,
212	.check_apicid_present		= bigsmp_check_apicid_present,
213
214	.vector_allocation_domain	= bigsmp_vector_allocation_domain,
215	.init_apic_ldr			= bigsmp_init_apic_ldr,
216
217	.ioapic_phys_id_map		= bigsmp_ioapic_phys_id_map,
218	.setup_apic_routing		= bigsmp_setup_apic_routing,
219	.multi_timer_check		= NULL,
220	.cpu_present_to_apicid		= bigsmp_cpu_present_to_apicid,
221	.apicid_to_cpu_present		= physid_set_mask_of_physid,
222	.setup_portio_remap		= NULL,
223	.check_phys_apicid_present	= bigsmp_check_phys_apicid_present,
224	.enable_apic_mode		= NULL,
225	.phys_pkg_id			= bigsmp_phys_pkg_id,
226	.mps_oem_check			= NULL,
227
228	.get_apic_id			= bigsmp_get_apic_id,
229	.set_apic_id			= NULL,
230	.apic_id_mask			= 0xFF << 24,
231
232	.cpu_mask_to_apicid		= bigsmp_cpu_mask_to_apicid,
233	.cpu_mask_to_apicid_and		= bigsmp_cpu_mask_to_apicid_and,
234
235	.send_IPI_mask			= bigsmp_send_IPI_mask,
 
236	.send_IPI_mask_allbutself	= NULL,
237	.send_IPI_allbutself		= bigsmp_send_IPI_allbutself,
238	.send_IPI_all			= bigsmp_send_IPI_all,
239	.send_IPI_self			= default_send_IPI_self,
240
241	.trampoline_phys_low		= DEFAULT_TRAMPOLINE_PHYS_LOW,
242	.trampoline_phys_high		= DEFAULT_TRAMPOLINE_PHYS_HIGH,
243
244	.wait_for_init_deassert		= default_wait_for_init_deassert,
245
246	.smp_callin_clear_local_apic	= NULL,
247	.inquire_remote_apic		= default_inquire_remote_apic,
248
249	.read				= native_apic_mem_read,
250	.write				= native_apic_mem_write,
251	.eoi_write			= native_apic_mem_write,
252	.icr_read			= native_apic_icr_read,
253	.icr_write			= native_apic_icr_write,
254	.wait_icr_idle			= native_apic_wait_icr_idle,
255	.safe_wait_icr_idle		= native_safe_apic_wait_icr_idle,
256
257	.x86_32_early_logical_apicid	= bigsmp_early_logical_apicid,
258};
259
260void __init generic_bigsmp_probe(void)
261{
262	unsigned int cpu;
263
264	if (!probe_bigsmp())
265		return;
266
267	apic = &apic_bigsmp;
268
269	for_each_possible_cpu(cpu) {
270		if (early_per_cpu(x86_cpu_to_logical_apicid,
271				  cpu) == BAD_APICID)
272			continue;
273		early_per_cpu(x86_cpu_to_logical_apicid, cpu) =
274			bigsmp_early_logical_apicid(cpu);
275	}
276
277	pr_info("Overriding APIC driver with %s\n", apic_bigsmp.name);
278}
279
280apic_driver(apic_bigsmp);