d25ae38b7e
intr_remapping_enabled get assigned later, so need to check that in setup_apic_routing Signed-off-by: Yinghai Lu <yhlu.kernel@gmail.com> Cc: Jack Steiner <steiner@sgi.com> Cc: Suresh Siddha <suresh.b.siddha@intel.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
165 lines
3.5 KiB
C
165 lines
3.5 KiB
C
#include <linux/threads.h>
|
|
#include <linux/cpumask.h>
|
|
#include <linux/string.h>
|
|
#include <linux/kernel.h>
|
|
#include <linux/ctype.h>
|
|
#include <linux/init.h>
|
|
#include <linux/dmar.h>
|
|
|
|
#include <asm/smp.h>
|
|
#include <asm/ipi.h>
|
|
#include <asm/genapic.h>
|
|
|
|
DEFINE_PER_CPU(u32, x86_cpu_to_logical_apicid);
|
|
|
|
static int __init x2apic_acpi_madt_oem_check(char *oem_id, char *oem_table_id)
|
|
{
|
|
if (cpu_has_x2apic)
|
|
return 1;
|
|
|
|
return 0;
|
|
}
|
|
|
|
/* Start with all IRQs pointing to boot CPU. IRQ balancing will shift them. */
|
|
|
|
static cpumask_t x2apic_target_cpus(void)
|
|
{
|
|
return cpumask_of_cpu(0);
|
|
}
|
|
|
|
/*
|
|
* for now each logical cpu is in its own vector allocation domain.
|
|
*/
|
|
static cpumask_t x2apic_vector_allocation_domain(int cpu)
|
|
{
|
|
cpumask_t domain = CPU_MASK_NONE;
|
|
cpu_set(cpu, domain);
|
|
return domain;
|
|
}
|
|
|
|
static void __x2apic_send_IPI_dest(unsigned int apicid, int vector,
|
|
unsigned int dest)
|
|
{
|
|
unsigned long cfg;
|
|
|
|
cfg = __prepare_ICR(0, vector, dest);
|
|
|
|
/*
|
|
* send the IPI.
|
|
*/
|
|
x2apic_icr_write(cfg, apicid);
|
|
}
|
|
|
|
/*
|
|
* for now, we send the IPI's one by one in the cpumask.
|
|
* TBD: Based on the cpu mask, we can send the IPI's to the cluster group
|
|
* at once. We have 16 cpu's in a cluster. This will minimize IPI register
|
|
* writes.
|
|
*/
|
|
static void x2apic_send_IPI_mask(cpumask_t mask, int vector)
|
|
{
|
|
unsigned long flags;
|
|
unsigned long query_cpu;
|
|
|
|
local_irq_save(flags);
|
|
for_each_cpu_mask(query_cpu, mask) {
|
|
__x2apic_send_IPI_dest(per_cpu(x86_cpu_to_logical_apicid, query_cpu),
|
|
vector, APIC_DEST_LOGICAL);
|
|
}
|
|
local_irq_restore(flags);
|
|
}
|
|
|
|
static void x2apic_send_IPI_allbutself(int vector)
|
|
{
|
|
cpumask_t mask = cpu_online_map;
|
|
|
|
cpu_clear(smp_processor_id(), mask);
|
|
|
|
if (!cpus_empty(mask))
|
|
x2apic_send_IPI_mask(mask, vector);
|
|
}
|
|
|
|
static void x2apic_send_IPI_all(int vector)
|
|
{
|
|
x2apic_send_IPI_mask(cpu_online_map, vector);
|
|
}
|
|
|
|
static int x2apic_apic_id_registered(void)
|
|
{
|
|
return 1;
|
|
}
|
|
|
|
static unsigned int x2apic_cpu_mask_to_apicid(cpumask_t cpumask)
|
|
{
|
|
int cpu;
|
|
|
|
/*
|
|
* We're using fixed IRQ delivery, can only return one phys APIC ID.
|
|
* May as well be the first.
|
|
*/
|
|
cpu = first_cpu(cpumask);
|
|
if ((unsigned)cpu < NR_CPUS)
|
|
return per_cpu(x86_cpu_to_logical_apicid, cpu);
|
|
else
|
|
return BAD_APICID;
|
|
}
|
|
|
|
static unsigned int get_apic_id(unsigned long x)
|
|
{
|
|
unsigned int id;
|
|
|
|
id = x;
|
|
return id;
|
|
}
|
|
|
|
static unsigned long set_apic_id(unsigned int id)
|
|
{
|
|
unsigned long x;
|
|
|
|
x = id;
|
|
return x;
|
|
}
|
|
|
|
static unsigned int x2apic_read_id(void)
|
|
{
|
|
return apic_read(APIC_ID);
|
|
}
|
|
|
|
static unsigned int phys_pkg_id(int index_msb)
|
|
{
|
|
return x2apic_read_id() >> index_msb;
|
|
}
|
|
|
|
static void x2apic_send_IPI_self(int vector)
|
|
{
|
|
apic_write(APIC_SELF_IPI, vector);
|
|
}
|
|
|
|
static void init_x2apic_ldr(void)
|
|
{
|
|
int cpu = smp_processor_id();
|
|
|
|
per_cpu(x86_cpu_to_logical_apicid, cpu) = apic_read(APIC_LDR);
|
|
return;
|
|
}
|
|
|
|
struct genapic apic_x2apic_cluster = {
|
|
.name = "cluster x2apic",
|
|
.acpi_madt_oem_check = x2apic_acpi_madt_oem_check,
|
|
.int_delivery_mode = dest_LowestPrio,
|
|
.int_dest_mode = (APIC_DEST_LOGICAL != 0),
|
|
.target_cpus = x2apic_target_cpus,
|
|
.vector_allocation_domain = x2apic_vector_allocation_domain,
|
|
.apic_id_registered = x2apic_apic_id_registered,
|
|
.init_apic_ldr = init_x2apic_ldr,
|
|
.send_IPI_all = x2apic_send_IPI_all,
|
|
.send_IPI_allbutself = x2apic_send_IPI_allbutself,
|
|
.send_IPI_mask = x2apic_send_IPI_mask,
|
|
.send_IPI_self = x2apic_send_IPI_self,
|
|
.cpu_mask_to_apicid = x2apic_cpu_mask_to_apicid,
|
|
.phys_pkg_id = phys_pkg_id,
|
|
.get_apic_id = get_apic_id,
|
|
.set_apic_id = set_apic_id,
|
|
.apic_id_mask = (0xFFFFFFFFu),
|
|
};
|