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 u32 bigsmp_get_apic_id(u32 x)
 17{
 18	return (x >> 24) & 0xFF;
 19}
 20
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 21static void bigsmp_send_IPI_allbutself(int vector)
 22{
 23	default_send_IPI_mask_allbutself_phys(cpu_online_mask, vector);
 24}
 25
 26static void bigsmp_send_IPI_all(int vector)
 27{
 28	default_send_IPI_mask_sequence_phys(cpu_online_mask, vector);
 29}
 30
 31static int dmi_bigsmp; /* can be set by dmi scanners */
 32
 33static int hp_ht_bigsmp(const struct dmi_system_id *d)
 34{
 35	printk(KERN_NOTICE "%s detected: force use of apic=bigsmp\n", d->ident);
 36	dmi_bigsmp = 1;
 37
 38	return 0;
 39}
 40
 41
 42static const struct dmi_system_id bigsmp_dmi_table[] = {
 43	{ hp_ht_bigsmp, "HP ProLiant DL760 G2",
 44		{	DMI_MATCH(DMI_BIOS_VENDOR, "HP"),
 45			DMI_MATCH(DMI_BIOS_VERSION, "P44-"),
 46		}
 47	},
 48
 49	{ hp_ht_bigsmp, "HP ProLiant DL740",
 50		{	DMI_MATCH(DMI_BIOS_VENDOR, "HP"),
 51			DMI_MATCH(DMI_BIOS_VERSION, "P47-"),
 52		}
 53	},
 54	{ } /* NULL entry stops DMI scanning */
 55};
 56
 57static int probe_bigsmp(void)
 58{
 59	return dmi_check_system(bigsmp_dmi_table);
 60}
 61
 62static struct apic apic_bigsmp __ro_after_init = {
 63
 64	.name				= "bigsmp",
 65	.probe				= probe_bigsmp,
 66
 67	.dest_mode_logical		= false,
 68
 69	.disable_esr			= 1,
 70
 
 
 71	.cpu_present_to_apicid		= default_cpu_present_to_apicid,
 
 72
 73	.max_apic_id			= 0xFE,
 74	.get_apic_id			= bigsmp_get_apic_id,
 
 75
 76	.calc_dest_apicid		= apic_default_calc_apicid,
 77
 78	.send_IPI			= default_send_IPI_single_phys,
 79	.send_IPI_mask			= default_send_IPI_mask_sequence_phys,
 80	.send_IPI_mask_allbutself	= NULL,
 81	.send_IPI_allbutself		= bigsmp_send_IPI_allbutself,
 82	.send_IPI_all			= bigsmp_send_IPI_all,
 83	.send_IPI_self			= default_send_IPI_self,
 84
 85	.read				= native_apic_mem_read,
 86	.write				= native_apic_mem_write,
 87	.eoi				= native_apic_mem_eoi,
 88	.icr_read			= native_apic_icr_read,
 89	.icr_write			= native_apic_icr_write,
 90	.wait_icr_idle			= apic_mem_wait_icr_idle,
 91	.safe_wait_icr_idle		= apic_mem_wait_icr_idle_timeout,
 92};
 93
 94bool __init apic_bigsmp_possible(bool cmdline_override)
 95{
 96	return apic == &apic_bigsmp || !cmdline_override;
 97}
 98
 99void __init apic_bigsmp_force(void)
100{
101	if (apic != &apic_bigsmp)
102		apic_install_driver(&apic_bigsmp);
103}
104
105apic_driver(apic_bigsmp);

  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 u32 bigsmp_get_apic_id(u32 x)
 17{
 18	return (x >> 24) & 0xFF;
 19}
 20
 21static bool bigsmp_check_apicid_used(physid_mask_t *map, u32 apicid)
 22{
 23	return false;
 24}
 25
 26static void bigsmp_ioapic_phys_id_map(physid_mask_t *phys_map, physid_mask_t *retmap)
 27{
 28	/* For clustered we don't have a good way to do this yet - hack */
 29	physids_promote(0xFFL, retmap);
 30}
 31
 32static u32 bigsmp_phys_pkg_id(u32 cpuid_apic, int index_msb)
 33{
 34	return cpuid_apic >> index_msb;
 35}
 36
 37static void bigsmp_send_IPI_allbutself(int vector)
 38{
 39	default_send_IPI_mask_allbutself_phys(cpu_online_mask, vector);
 40}
 41
 42static void bigsmp_send_IPI_all(int vector)
 43{
 44	default_send_IPI_mask_sequence_phys(cpu_online_mask, vector);
 45}
 46
 47static int dmi_bigsmp; /* can be set by dmi scanners */
 48
 49static int hp_ht_bigsmp(const struct dmi_system_id *d)
 50{
 51	printk(KERN_NOTICE "%s detected: force use of apic=bigsmp\n", d->ident);
 52	dmi_bigsmp = 1;
 53
 54	return 0;
 55}
 56
 57
 58static const struct dmi_system_id bigsmp_dmi_table[] = {
 59	{ hp_ht_bigsmp, "HP ProLiant DL760 G2",
 60		{	DMI_MATCH(DMI_BIOS_VENDOR, "HP"),
 61			DMI_MATCH(DMI_BIOS_VERSION, "P44-"),
 62		}
 63	},
 64
 65	{ hp_ht_bigsmp, "HP ProLiant DL740",
 66		{	DMI_MATCH(DMI_BIOS_VENDOR, "HP"),
 67			DMI_MATCH(DMI_BIOS_VERSION, "P47-"),
 68		}
 69	},
 70	{ } /* NULL entry stops DMI scanning */
 71};
 72
 73static int probe_bigsmp(void)
 74{
 75	return dmi_check_system(bigsmp_dmi_table);
 76}
 77
 78static struct apic apic_bigsmp __ro_after_init = {
 79
 80	.name				= "bigsmp",
 81	.probe				= probe_bigsmp,
 82
 83	.dest_mode_logical		= false,
 84
 85	.disable_esr			= 1,
 86
 87	.check_apicid_used		= bigsmp_check_apicid_used,
 88	.ioapic_phys_id_map		= bigsmp_ioapic_phys_id_map,
 89	.cpu_present_to_apicid		= default_cpu_present_to_apicid,
 90	.phys_pkg_id			= bigsmp_phys_pkg_id,
 91
 92	.max_apic_id			= 0xFE,
 93	.get_apic_id			= bigsmp_get_apic_id,
 94	.set_apic_id			= NULL,
 95
 96	.calc_dest_apicid		= apic_default_calc_apicid,
 97
 98	.send_IPI			= default_send_IPI_single_phys,
 99	.send_IPI_mask			= default_send_IPI_mask_sequence_phys,
100	.send_IPI_mask_allbutself	= NULL,
101	.send_IPI_allbutself		= bigsmp_send_IPI_allbutself,
102	.send_IPI_all			= bigsmp_send_IPI_all,
103	.send_IPI_self			= default_send_IPI_self,
104
105	.read				= native_apic_mem_read,
106	.write				= native_apic_mem_write,
107	.eoi				= native_apic_mem_eoi,
108	.icr_read			= native_apic_icr_read,
109	.icr_write			= native_apic_icr_write,
110	.wait_icr_idle			= apic_mem_wait_icr_idle,
111	.safe_wait_icr_idle		= apic_mem_wait_icr_idle_timeout,
112};
113
114bool __init apic_bigsmp_possible(bool cmdline_override)
115{
116	return apic == &apic_bigsmp || !cmdline_override;
117}
118
119void __init apic_bigsmp_force(void)
120{
121	if (apic != &apic_bigsmp)
122		apic_install_driver(&apic_bigsmp);
123}
124
125apic_driver(apic_bigsmp);