Commit 2705a3d2 authored by Feng Wu's avatar Feng Wu Committed by Thomas Gleixner

iommu, x86: Save the mode (posted or remapped) of an IRTE

Add a new field to struct irq_2_iommu, which captures whether the
associated IRTE is in posted mode or remapped mode. We update this
field when the IRTE is written into the table.
Suggested-by: default avatarThomas Gleixner <tglx@linutronix.de>
Signed-off-by: default avatarFeng Wu <feng.wu@intel.com>
Reviewed-by: default avatarThomas Gleixner <tglx@linutronix.de>
Acked-by: default avatarJoerg Roedel <joro@8bytes.org>
Cc: jiang.liu@linux.intel.com
Cc: iommu@lists.linux-foundation.org
Cc: dwmw2@infradead.org
Link: http://lkml.kernel.org/r/1433827237-3382-6-git-send-email-feng.wu@intel.comSigned-off-by: default avatarThomas Gleixner <tglx@linutronix.de>
parent 8541186f
......@@ -18,6 +18,11 @@
#include "irq_remapping.h"
enum irq_mode {
IRQ_REMAPPING,
IRQ_POSTING,
};
struct ioapic_scope {
struct intel_iommu *iommu;
unsigned int id;
......@@ -37,6 +42,7 @@ struct irq_2_iommu {
u16 irte_index;
u16 sub_handle;
u8 irte_mask;
enum irq_mode mode;
};
struct intel_ir_data {
......@@ -104,6 +110,7 @@ static int alloc_irte(struct intel_iommu *iommu, int irq,
irq_iommu->irte_index = index;
irq_iommu->sub_handle = 0;
irq_iommu->irte_mask = mask;
irq_iommu->mode = IRQ_REMAPPING;
}
raw_spin_unlock_irqrestore(&irq_2_ir_lock, flags);
......@@ -144,6 +151,9 @@ static int modify_irte(struct irq_2_iommu *irq_iommu,
__iommu_flush_cache(iommu, irte, sizeof(*irte));
rc = qi_flush_iec(iommu, index, 0);
/* Update iommu mode according to the IRTE mode */
irq_iommu->mode = irte->pst ? IRQ_POSTING : IRQ_REMAPPING;
raw_spin_unlock_irqrestore(&irq_2_ir_lock, flags);
return rc;
......
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