Contributors: 24
| Author |
Tokens |
Token Proportion |
Commits |
Commit Proportion |
| Yinghai Lu |
105 |
18.07% |
6 |
8.96% |
| Suresh B. Siddha |
96 |
16.52% |
8 |
11.94% |
| James Cleverdon |
80 |
13.77% |
1 |
1.49% |
| Thomas Gleixner |
71 |
12.22% |
19 |
28.36% |
| Ingo Molnar |
71 |
12.22% |
12 |
17.91% |
| Mike Travis |
45 |
7.75% |
2 |
2.99% |
| Andi Kleen |
35 |
6.02% |
2 |
2.99% |
| Linus Torvalds |
20 |
3.44% |
1 |
1.49% |
| Andrew Morton |
7 |
1.20% |
1 |
1.49% |
| Alexey Y. Starikovskiy |
7 |
1.20% |
1 |
1.49% |
| Jason Davis |
7 |
1.20% |
1 |
1.49% |
| Michael S. Tsirkin |
6 |
1.03% |
1 |
1.49% |
| Eric W. Biedermann |
6 |
1.03% |
1 |
1.49% |
| Jeremy Fitzhardinge |
6 |
1.03% |
1 |
1.49% |
| Jan Kiszka |
5 |
0.86% |
1 |
1.49% |
| Kees Cook |
3 |
0.52% |
1 |
1.49% |
| Masahiro Yamada |
2 |
0.34% |
1 |
1.49% |
| Randy Dunlap |
2 |
0.34% |
1 |
1.49% |
| Jan Beulich |
2 |
0.34% |
1 |
1.49% |
| Nadav Amit |
1 |
0.17% |
1 |
1.49% |
| Len Brown |
1 |
0.17% |
1 |
1.49% |
| Fernando Luis Vázquez Cao |
1 |
0.17% |
1 |
1.49% |
| Paul Gortmaker |
1 |
0.17% |
1 |
1.49% |
| Jasper Spaans |
1 |
0.17% |
1 |
1.49% |
| Total |
581 |
|
67 |
|
// SPDX-License-Identifier: GPL-2.0-only
/*
* Copyright 2004 James Cleverdon, IBM.
*
* Flat APIC subarch code.
*
* Hacked for x86-64 by James Cleverdon from i386 architecture code by
* Martin Bligh, Andi Kleen, James Bottomley, John Stultz, and
* James Cleverdon.
*/
#include <linux/cpumask.h>
#include <linux/export.h>
#include <linux/acpi.h>
#include <asm/jailhouse_para.h>
#include <asm/apic.h>
#include "local.h"
static struct apic apic_physflat;
static struct apic apic_flat;
struct apic *apic __ro_after_init = &apic_flat;
EXPORT_SYMBOL_GPL(apic);
static int flat_acpi_madt_oem_check(char *oem_id, char *oem_table_id)
{
return 1;
}
static void _flat_send_IPI_mask(unsigned long mask, int vector)
{
unsigned long flags;
local_irq_save(flags);
__default_send_IPI_dest_field(mask, vector, APIC_DEST_LOGICAL);
local_irq_restore(flags);
}
static void flat_send_IPI_mask(const struct cpumask *cpumask, int vector)
{
unsigned long mask = cpumask_bits(cpumask)[0];
_flat_send_IPI_mask(mask, vector);
}
static void
flat_send_IPI_mask_allbutself(const struct cpumask *cpumask, int vector)
{
unsigned long mask = cpumask_bits(cpumask)[0];
int cpu = smp_processor_id();
if (cpu < BITS_PER_LONG)
__clear_bit(cpu, &mask);
_flat_send_IPI_mask(mask, vector);
}
static u32 flat_get_apic_id(u32 x)
{
return (x >> 24) & 0xFF;
}
static int flat_probe(void)
{
return 1;
}
static struct apic apic_flat __ro_after_init = {
.name = "flat",
.probe = flat_probe,
.acpi_madt_oem_check = flat_acpi_madt_oem_check,
.dest_mode_logical = true,
.disable_esr = 0,
.init_apic_ldr = default_init_apic_ldr,
.cpu_present_to_apicid = default_cpu_present_to_apicid,
.max_apic_id = 0xFE,
.get_apic_id = flat_get_apic_id,
.calc_dest_apicid = apic_flat_calc_apicid,
.send_IPI = default_send_IPI_single,
.send_IPI_mask = flat_send_IPI_mask,
.send_IPI_mask_allbutself = flat_send_IPI_mask_allbutself,
.send_IPI_allbutself = default_send_IPI_allbutself,
.send_IPI_all = default_send_IPI_all,
.send_IPI_self = default_send_IPI_self,
.nmi_to_offline_cpu = true,
.read = native_apic_mem_read,
.write = native_apic_mem_write,
.eoi = native_apic_mem_eoi,
.icr_read = native_apic_icr_read,
.icr_write = native_apic_icr_write,
.wait_icr_idle = apic_mem_wait_icr_idle,
.safe_wait_icr_idle = apic_mem_wait_icr_idle_timeout,
};
/*
* Physflat mode is used when there are more than 8 CPUs on a system.
* We cannot use logical delivery in this case because the mask
* overflows, so use physical mode.
*/
static int physflat_acpi_madt_oem_check(char *oem_id, char *oem_table_id)
{
#ifdef CONFIG_ACPI
/*
* Quirk: some x86_64 machines can only use physical APIC mode
* regardless of how many processors are present (x86_64 ES7000
* is an example).
*/
if (acpi_gbl_FADT.header.revision >= FADT2_REVISION_ID &&
(acpi_gbl_FADT.flags & ACPI_FADT_APIC_PHYSICAL)) {
printk(KERN_DEBUG "system APIC only can use physical flat");
return 1;
}
if (!strncmp(oem_id, "IBM", 3) && !strncmp(oem_table_id, "EXA", 3)) {
printk(KERN_DEBUG "IBM Summit detected, will use apic physical");
return 1;
}
#endif
return 0;
}
static int physflat_probe(void)
{
return apic == &apic_physflat || num_possible_cpus() > 8 || jailhouse_paravirt();
}
static struct apic apic_physflat __ro_after_init = {
.name = "physical flat",
.probe = physflat_probe,
.acpi_madt_oem_check = physflat_acpi_madt_oem_check,
.dest_mode_logical = false,
.disable_esr = 0,
.cpu_present_to_apicid = default_cpu_present_to_apicid,
.max_apic_id = 0xFE,
.get_apic_id = flat_get_apic_id,
.calc_dest_apicid = apic_default_calc_apicid,
.send_IPI = default_send_IPI_single_phys,
.send_IPI_mask = default_send_IPI_mask_sequence_phys,
.send_IPI_mask_allbutself = default_send_IPI_mask_allbutself_phys,
.send_IPI_allbutself = default_send_IPI_allbutself,
.send_IPI_all = default_send_IPI_all,
.send_IPI_self = default_send_IPI_self,
.nmi_to_offline_cpu = true,
.read = native_apic_mem_read,
.write = native_apic_mem_write,
.eoi = native_apic_mem_eoi,
.icr_read = native_apic_icr_read,
.icr_write = native_apic_icr_write,
.wait_icr_idle = apic_mem_wait_icr_idle,
.safe_wait_icr_idle = apic_mem_wait_icr_idle_timeout,
};
/*
* We need to check for physflat first, so this order is important.
*/
apic_drivers(apic_physflat, apic_flat);