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Subject[PATCH 04/13] iommu/vt-d: Adjust 'struct irte' to better suit for VT-d Posted-Interrupts
Date
This patch adjusts the definition of 'struct irte', so that we can
add the VT-d Posted-Interrtups format in this structure later.

Signed-off-by: Feng Wu <feng.wu@intel.com>
---
drivers/iommu/intel_irq_remapping.c | 35 +++++++++++++++++++----------------
include/linux/dmar.h | 4 ++--
2 files changed, 21 insertions(+), 18 deletions(-)

diff --git a/drivers/iommu/intel_irq_remapping.c b/drivers/iommu/intel_irq_remapping.c
index f99f0f1..776da10 100644
--- a/drivers/iommu/intel_irq_remapping.c
+++ b/drivers/iommu/intel_irq_remapping.c
@@ -310,9 +310,9 @@ static void set_irte_sid(struct irte *irte, unsigned int svt,
{
if (disable_sourceid_checking)
svt = SVT_NO_VERIFY;
- irte->svt = svt;
- irte->sq = sq;
- irte->sid = sid;
+ irte->irq_remap_high.svt = svt;
+ irte->irq_remap_high.sq = sq;
+ irte->irq_remap_high.sid = sid;
}

static int set_ioapic_sid(struct irte *irte, int apic)
@@ -917,8 +917,8 @@ static void prepare_irte(struct irte *irte, int vector,
{
memset(irte, 0, sizeof(*irte));

- irte->present = 1;
- irte->dst_mode = apic->irq_dest_mode;
+ irte->irq_remap_low.present = 1;
+ irte->irq_remap_low.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
@@ -926,11 +926,11 @@ static void prepare_irte(struct irte *irte, int vector,
* 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;
+ irte->irq_remap_low.trigger_mode = 0;
+ irte->irq_remap_low.dlvry_mode = apic->irq_delivery_mode;
+ irte->irq_remap_low.vector = vector;
+ irte->irq_remap_low.dest_id = IRTE_DEST(dest);
+ irte->irq_remap_low.redir_hint = 1;
}

static int intel_setup_ioapic_entry(int irq,
@@ -973,10 +973,13 @@ static int intel_setup_ioapic_entry(int irq,
"Redir_hint:%d Trig_Mode:%d Dlvry_Mode:%X "
"Avail:%X Vector:%02X Dest:%08X "
"SID:%04X SQ:%X SVT:%X)\n",
- attr->ioapic, irte.present, irte.fpd, irte.dst_mode,
- irte.redir_hint, irte.trigger_mode, irte.dlvry_mode,
- irte.avail, irte.vector, irte.dest_id,
- irte.sid, irte.sq, irte.svt);
+ attr->ioapic, irte.irq_remap_low.present,
+ irte.irq_remap_low.fpd, irte.irq_remap_low.dst_mode,
+ irte.irq_remap_low.redir_hint, irte.irq_remap_low.trigger_mode,
+ irte.irq_remap_low.dlvry_mode, irte.irq_remap_low.avail,
+ irte.irq_remap_low.vector, irte.irq_remap_low.dest_id,
+ irte.irq_remap_high.sid, irte.irq_remap_high.sq,
+ irte.irq_remap_high.svt);

entry = (struct IR_IO_APIC_route_entry *)route_entry;
memset(entry, 0, sizeof(*entry));
@@ -1046,8 +1049,8 @@ intel_ioapic_set_affinity(struct irq_data *data, const struct cpumask *mask,
return err;
}

- irte.vector = cfg->vector;
- irte.dest_id = IRTE_DEST(dest);
+ irte.irq_remap_low.vector = cfg->vector;
+ irte.irq_remap_low.dest_id = IRTE_DEST(dest);

/*
* Atomically updates the IRTE with the new destination, vector
diff --git a/include/linux/dmar.h b/include/linux/dmar.h
index 593fff9..8be5d42 100644
--- a/include/linux/dmar.h
+++ b/include/linux/dmar.h
@@ -159,7 +159,7 @@ struct irte {
vector : 8,
__reserved_2 : 8,
dest_id : 32;
- };
+ } irq_remap_low;
__u64 low;
};

@@ -169,7 +169,7 @@ struct irte {
sq : 2,
svt : 2,
__reserved_3 : 44;
- };
+ } irq_remap_high;
__u64 high;
};
};
--
1.7.1


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