[PATCH v2 04/26] x86, irq: Show MSI-X in /proc/interrupt

Yinghai Lu
2013-02-08T19:29:41Z

Now MSI-X is shown as MSI in /proc/interrupt.

We could use new added irq_print_chip() interface to append -X for MSI-X.

-v2: do not need to check if msi_desc is null in msi_irq_print_chip().

Signed-off-by: Yinghai Lu <yinghai@kernel.org>
Cc: Joerg Roedel <joro@8bytes.org>
Cc: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Cc: Sebastian Andrzej Siewior <sebastian@breakpoint.cc>
---
arch/x86/kernel/apic/io_apic.c | 7 +++++++
drivers/iommu/irq_remapping.c | 5 ++++-
2 files changed, 11 insertions(+), 1 deletion(-)

diff --git a/arch/x86/kernel/apic/io_apic.c b/arch/x86/kernel/apic/io_apic.c
index 059589f..f8d4d8d 100644
--- a/arch/x86/kernel/apic/io_apic.c
+++ b/arch/x86/kernel/apic/io_apic.c
@@ -3087,6 +3087,12 @@ msi_set_affinity(struct irq_data *data, const struct cpumask *mask, bool force)
return IRQ_SET_MASK_OK_NOCOPY;
}

+static void msi_irq_print_chip(struct irq_data *data, struct seq_file *p)
+{
+ seq_printf(p, " %s%s", data->chip->name,
+ data->msi_desc->msi_attrib.is_msix ? "-X" : "");
+}
+
/*
* IRQ Chip for MSI PCI/PCI-X/PCI-Express Devices,
* which implement the MSI or MSI-X Capability Structure.
@@ -3098,6 +3104,7 @@ struct irq_chip msi_chip = {
.irq_ack = ack_apic_edge,
.irq_set_affinity = msi_set_affinity,
.irq_retrigger = ioapic_retrigger_irq,
+ .irq_print_chip = msi_irq_print_chip,
};

int setup_msi_irq(struct pci_dev *dev, struct msi_desc *msidesc,
diff --git a/drivers/iommu/irq_remapping.c b/drivers/iommu/irq_remapping.c
index 33918c3..e245ab0 100644
--- a/drivers/iommu/irq_remapping.c
+++ b/drivers/iommu/irq_remapping.c
@@ -365,7 +365,10 @@ static void ir_ack_apic_level(struct irq_data *data)

static void ir_print_prefix(struct irq_data *data, struct seq_file *p)
{
- seq_printf(p, " IR-%s", data->chip->name);
+ seq_printf(p, " IR-%s%s", data->chip->name,
+ data->msi_desc ?
+ (data->msi_desc->msi_attrib.is_msix ? "-X" : "")
+ : "");
}

static void __init irq_remap_modify_chip_defaults(struct irq_chip *chip)
--
1.7.10.4