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x86/apic: Implement effective irq mask update

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Add the effective irq mask update to the apic implementations and enable
effective irq masks for x86.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Cc: Jens Axboe <axboe@kernel.dk>
Cc: Marc Zyngier <marc.zyngier@arm.com>
Cc: Michael Ellerman <mpe@ellerman.id.au>
Cc: Keith Busch <keith.busch@intel.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Christoph Hellwig <hch@lst.de>
Link: http://lkml.kernel.org/r/20170619235446.878370703@linutronix.de
This commit is contained in:
Thomas Gleixner 2017-06-20 01:37:46 +02:00
parent ef1c2cc885
commit c7d6c9dd87
3 changed files with 8 additions and 0 deletions
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1
arch/x86/Kconfig
View File

@ -87,6 +87,7 @@ config X86
select GENERIC_EARLY_IOREMAP
select GENERIC_FIND_FIRST_BIT
select GENERIC_IOMAP
select GENERIC_IRQ_EFFECTIVE_AFF_MASK if SMP
select GENERIC_IRQ_MIGRATION if SMP
select GENERIC_IRQ_PROBE
select GENERIC_IRQ_SHOW

3
arch/x86/kernel/apic/apic.c
View File

@ -2210,6 +2210,7 @@ int default_cpu_mask_to_apicid(const struct cpumask *mask,
if (cpu >= nr_cpu_ids)
return -EINVAL;
*apicid = per_cpu(x86_cpu_to_apicid, cpu);
irq_data_update_effective_affinity(irqdata, cpumask_of(cpu));
return 0;
}
@ -2218,11 +2219,13 @@ int flat_cpu_mask_to_apicid(const struct cpumask *mask,
unsigned int *apicid)
{
struct cpumask *effmsk = irq_data_get_effective_affinity_mask(irqdata);
unsigned long cpu_mask = cpumask_bits(mask)[0] & APIC_ALL_CPUS;
if (!cpu_mask)
return -EINVAL;
*apicid = (unsigned int)cpu_mask;
cpumask_bits(effmsk)[0] = cpu_mask;
return 0;
}

4
arch/x86/kernel/apic/x2apic_cluster.c
View File

@ -4,6 +4,7 @@
#include <linux/kernel.h>
#include <linux/ctype.h>
#include <linux/dmar.h>
#include <linux/irq.h>
#include <linux/cpu.h>
#include <asm/smp.h>
@ -107,6 +108,7 @@ static int
x2apic_cpu_mask_to_apicid(const struct cpumask *mask, struct irq_data *irqdata,
unsigned int *apicid)
{
struct cpumask *effmsk = irq_data_get_effective_affinity_mask(irqdata);
unsigned int cpu;
u32 dest = 0;
u16 cluster;
@ -118,10 +120,12 @@ x2apic_cpu_mask_to_apicid(const struct cpumask *mask, struct irq_data *irqdata,
dest = per_cpu(x86_cpu_to_logical_apicid, cpu);
cluster = x2apic_cluster(cpu);
cpumask_clear(effmsk);
for_each_cpu(cpu, mask) {
if (cluster != x2apic_cluster(cpu))
continue;
dest |= per_cpu(x86_cpu_to_logical_apicid, cpu);
cpumask_set_cpu(cpu, effmsk);
}
*apicid = dest;