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authorJoerg Roedel <joerg.roedel@amd.com>2012-03-30 22:47:03 +0400
committerJoerg Roedel <joerg.roedel@amd.com>2012-05-07 16:34:59 +0400
commit4c1bad6a0af1e297c8d05365e65af89d8c7bf9d1 (patch)
treea369a0bfd4c744b67e218ef294753a1ccc38b13a /arch/x86
parent0c3f173a88c4ae3e4253427cf574a59ad5352918 (diff)
downloadlinux-4c1bad6a0af1e297c8d05365e65af89d8c7bf9d1.tar.xz
iommu/vt-d: Convert IR set_affinity function to remap_ops
The function to set interrupt affinity with interrupt remapping enabled is Intel specific too. So move it to the irq_remap_ops too. Signed-off-by: Joerg Roedel <joerg.roedel@amd.com> Acked-by: Yinghai Lu <yinghai@kernel.org> Cc: David Woodhouse <dwmw2@infradead.org> Cc: Alex Williamson <alex.williamson@redhat.com> Signed-off-by: Suresh Siddha <suresh.b.siddha@intel.com> Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
Diffstat (limited to 'arch/x86')
-rw-r--r--arch/x86/include/asm/intr_remapping.h9
-rw-r--r--arch/x86/kernel/apic/io_apic.c69
2 files changed, 11 insertions, 67 deletions
diff --git a/arch/x86/include/asm/intr_remapping.h b/arch/x86/include/asm/intr_remapping.h
index a22e1f1ac7ec..ae933ecfd8f0 100644
--- a/arch/x86/include/asm/intr_remapping.h
+++ b/arch/x86/include/asm/intr_remapping.h
@@ -40,6 +40,9 @@ extern int intr_setup_ioapic_entry(int irq,
struct IO_APIC_route_entry *entry,
unsigned int destination, int vector,
struct io_apic_irq_attr *attr);
+extern int intr_set_affinity(struct irq_data *data,
+ const struct cpumask *mask,
+ bool force);
#else /* CONFIG_IRQ_REMAP */
@@ -59,6 +62,12 @@ static inline int intr_setup_ioapic_entry(int irq,
{
return -ENODEV;
}
+static inline int intr_set_affinity(struct irq_data *data,
+ const struct cpumask *mask,
+ bool force)
+{
+ return 0;
+}
#endif /* CONFIG_IRQ_REMAP */
#endif /* __X86_INTR_REMAPPING_H */
diff --git a/arch/x86/kernel/apic/io_apic.c b/arch/x86/kernel/apic/io_apic.c
index e1ab625fb9ca..a97c79aa25cf 100644
--- a/arch/x86/kernel/apic/io_apic.c
+++ b/arch/x86/kernel/apic/io_apic.c
@@ -2327,71 +2327,6 @@ ioapic_set_affinity(struct irq_data *data, const struct cpumask *mask,
return ret;
}
-#ifdef CONFIG_IRQ_REMAP
-
-/*
- * Migrate the IO-APIC irq in the presence of intr-remapping.
- *
- * For both level and edge triggered, irq migration is a simple atomic
- * update(of vector and cpu destination) of IRTE and flush the hardware cache.
- *
- * For level triggered, we eliminate the io-apic RTE modification (with the
- * updated vector information), by using a virtual vector (io-apic pin number).
- * Real vector that is used for interrupting cpu will be coming from
- * the interrupt-remapping table entry.
- *
- * As the migration is a simple atomic update of IRTE, the same mechanism
- * is used to migrate MSI irq's in the presence of interrupt-remapping.
- */
-static int
-ir_ioapic_set_affinity(struct irq_data *data, const struct cpumask *mask,
- bool force)
-{
- struct irq_cfg *cfg = data->chip_data;
- unsigned int dest, irq = data->irq;
- struct irte irte;
-
- if (!cpumask_intersects(mask, cpu_online_mask))
- return -EINVAL;
-
- if (get_irte(irq, &irte))
- return -EBUSY;
-
- if (assign_irq_vector(irq, cfg, mask))
- return -EBUSY;
-
- dest = apic->cpu_mask_to_apicid_and(cfg->domain, mask);
-
- irte.vector = cfg->vector;
- irte.dest_id = IRTE_DEST(dest);
-
- /*
- * Atomically updates the IRTE with the new destination, vector
- * and flushes the interrupt entry cache.
- */
- modify_irte(irq, &irte);
-
- /*
- * After this point, all the interrupts will start arriving
- * at the new destination. So, time to cleanup the previous
- * vector allocation.
- */
- if (cfg->move_in_progress)
- send_cleanup_vector(cfg);
-
- cpumask_copy(data->affinity, mask);
- return 0;
-}
-
-#else
-static inline int
-ir_ioapic_set_affinity(struct irq_data *data, const struct cpumask *mask,
- bool force)
-{
- return 0;
-}
-#endif
-
asmlinkage void smp_irq_move_cleanup_interrupt(void)
{
unsigned vector, me;
@@ -2636,7 +2571,7 @@ static void irq_remap_modify_chip_defaults(struct irq_chip *chip)
chip->irq_eoi = ir_ack_apic_level;
#ifdef CONFIG_SMP
- chip->irq_set_affinity = ir_ioapic_set_affinity;
+ chip->irq_set_affinity = intr_set_affinity;
#endif
}
#endif /* CONFIG_IRQ_REMAP */
@@ -3826,7 +3761,7 @@ void __init setup_ioapic_dest(void)
mask = apic->target_cpus();
if (intr_remapping_enabled)
- ir_ioapic_set_affinity(idata, mask, false);
+ intr_set_affinity(idata, mask, false);
else
ioapic_set_affinity(idata, mask, false);
}