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