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Subject[PATCH 01/28] x86/irq: Add data structure to keep AMD specific irq remapping information
Date
Add a data structure to store information the IOMMU driver
can use to get from a 'struct irq_cfg' to the remapping
entry.

Cc: x86@kernel.org
Cc: Yinghai Lu <yinghai@kernel.org>
Cc: Suresh Siddha <suresh.b.siddha@intel.com>
Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
---
arch/x86/include/asm/hw_irq.h | 14 +++++++++++++-
arch/x86/kernel/apic/io_apic.c | 2 +-
drivers/iommu/intel_irq_remapping.c | 2 +-
3 files changed, 15 insertions(+), 3 deletions(-)

diff --git a/arch/x86/include/asm/hw_irq.h b/arch/x86/include/asm/hw_irq.h
index eb92a6e..b6171e6 100644
--- a/arch/x86/include/asm/hw_irq.h
+++ b/arch/x86/include/asm/hw_irq.h
@@ -101,6 +101,7 @@ static inline void set_io_apic_irq_attr(struct io_apic_irq_attr *irq_attr,
irq_attr->polarity = polarity;
}

+/* Intel specific interrupt remapping information */
struct irq_2_iommu {
struct intel_iommu *iommu;
u16 irte_index;
@@ -108,6 +109,17 @@ struct irq_2_iommu {
u8 irte_mask;
};

+/* AMD specific interrupt remapping information */
+struct irq_2_irte {
+ u16 devid; /* Device ID for IRTE table */
+ u16 index; /* Index into IRTE table*/
+};
+
+union irq_remap_info {
+ struct irq_2_iommu irq_2_iommu;
+ struct irq_2_irte irq_2_irte;
+};
+
/*
* This is performance-critical, we want to do it O(1)
*
@@ -120,7 +132,7 @@ struct irq_cfg {
u8 vector;
u8 move_in_progress : 1;
#ifdef CONFIG_IRQ_REMAP
- struct irq_2_iommu irq_2_iommu;
+ union irq_remap_info irq_remap_info;
#endif
};

diff --git a/arch/x86/kernel/apic/io_apic.c b/arch/x86/kernel/apic/io_apic.c
index 5f0ff59..08f666c 100644
--- a/arch/x86/kernel/apic/io_apic.c
+++ b/arch/x86/kernel/apic/io_apic.c
@@ -72,7 +72,7 @@
static void irq_remap_modify_chip_defaults(struct irq_chip *chip);
static inline bool irq_remapped(struct irq_cfg *cfg)
{
- return cfg->irq_2_iommu.iommu != NULL;
+ return cfg->irq_remap_info.irq_2_iommu.iommu != NULL;
}
#else
static inline bool irq_remapped(struct irq_cfg *cfg)
diff --git a/drivers/iommu/intel_irq_remapping.c b/drivers/iommu/intel_irq_remapping.c
index 6d34706..e4e4334 100644
--- a/drivers/iommu/intel_irq_remapping.c
+++ b/drivers/iommu/intel_irq_remapping.c
@@ -43,7 +43,7 @@ static DEFINE_RAW_SPINLOCK(irq_2_ir_lock);
static struct irq_2_iommu *irq_2_iommu(unsigned int irq)
{
struct irq_cfg *cfg = irq_get_chip_data(irq);
- return cfg ? &cfg->irq_2_iommu : NULL;
+ return cfg ? &cfg->irq_remap_info.irq_2_iommu : NULL;
}

int get_irte(int irq, struct irte *entry)
--
1.7.9.5



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