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arch/intel64: add CPU affinity support for irq

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add CPU affinity support for interrupts (up_affinity_irq)

Signed-off-by: p-szafonimateusz <p-szafonimateusz@xiaomi.com>
This commit is contained in:
p-szafonimateusz
2025-11-03 14:43:07 +01:00
committed by archer
parent 4bfa4fa2e3
commit 8b57a48d8f
1 changed files with 38 additions and 0 deletions
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arch/x86_64/src/intel64/intel64_irq.c
+38
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@@ -845,3 +845,41 @@ int up_set_irq_type(int irq, int mode)
return 0;
}
/****************************************************************************
* Name: up_affinity_irq
*
* Description:
* Set an IRQ affinity by software.
*
****************************************************************************/
void up_affinity_irq(int irq, cpu_set_t cpuset)
{
irqstate_t flags = spin_lock_irqsave(&g_irq_spinlock);
uint32_t data;
int cpu;
if (irq >= IRQ_MSI_START && irq <= g_msi_now)
{
/* Affinity for MSI is not supported now.
* For x86 this must be done on PCI level as MSI/MSI-X interrupts
* bypass IOAPIC.
*/
spin_unlock_irqrestore(&g_irq_spinlock, flags);
return;
}
for (cpu = 0; cpu < CONFIG_NCPUS; cpu++)
{
if (CPU_ISSET(cpu, &cpuset))
{
data = x86_64_cpu_to_loapic(cpu) << 24;
up_ioapic_write(IOAPIC_REG_TABLE + (irq - IRQ0) * 2 + 1, data);
break;
}
}
spin_unlock_irqrestore(&g_irq_spinlock, flags);
}