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iommu/vt-d: Convert MSI remapping setup to remap_ops

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This patch introduces remapping-ops for setting ups MSI
interrupts.

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>
This commit is contained in:
Joerg Roedel
2012-03-30 11:47:05 -07:00
parent 9d619f6572
commit 5e2b930b07
6 changed files with 205 additions and 117 deletions
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23
arch/x86/include/asm/irq_remapping.h
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@@ -5,34 +5,11 @@
#ifdef CONFIG_IRQ_REMAP
static void irq_remap_modify_chip_defaults(struct irq_chip *chip);
static inline void prepare_irte(struct irte *irte, int vector,
unsigned int dest)
{
memset(irte, 0, sizeof(*irte));
irte->present = 1;
irte->dst_mode = apic->irq_dest_mode;
/*
* Trigger mode in the IRTE will always be edge, and for IO-APIC, the
* actual level or edge trigger will be setup in the IO-APIC
* RTE. This will help simplify level triggered irq migration.
* For more details, see the comments (in io_apic.c) explainig IO-APIC
* irq migration in the presence of interrupt-remapping.
*/
irte->trigger_mode = 0;
irte->dlvry_mode = apic->irq_delivery_mode;
irte->vector = vector;
irte->dest_id = IRTE_DEST(dest);
irte->redir_hint = 1;
}
static inline bool irq_remapped(struct irq_cfg *cfg)
{
return cfg->irq_2_iommu.iommu != NULL;
}
#else
static void prepare_irte(struct irte *irte, int vector, unsigned int dest)
{
}
static inline bool irq_remapped(struct irq_cfg *cfg)
{
return false;