[PATCH 3/3] x86: intremap: Dump IRTEs to /sys/kernel/intremap

[Alexander Gordeev]

Signed-off-by: Alexander Gordeev <agordeev@xxxxxxxxxx>
---
 drivers/iommu/intr_remapping.c |   26 ++++++++++++++++++++++++++
 kernel/ksysfs.c                |   29 +++++++++++++++++++----------
 2 files changed, 45 insertions(+), 10 deletions(-)

diff --git a/drivers/iommu/intr_remapping.c b/drivers/iommu/intr_remapping.c
index adb0818..541dc33 100644
--- a/drivers/iommu/intr_remapping.c
+++ b/drivers/iommu/intr_remapping.c
@@ -832,3 +832,29 @@ error:
 	return -1;
 }
 
+int sprintf_IRTE(char *p, int irq, const struct irte *irte)
+{
+	char *buf = p;
+
+	p += sprintf(p, "%4d: %1d   %1d  %1d  %1d  %1d %03X %03X %04X.%04X %04X  %1d   %1d\n", irq, irte->present, irte->fpd, irte->dst_mode, irte->redir_hint, irte->trigger_mode, irte->dlvry_mode, irte->vector, (irte->dest_id >> 16) & 0xFFFF, irte->dest_id & 0xFFFF, irte->sid, irte->sq, irte->svt);
+
+	return p - buf;
+}
+
+int sprintf_IRTEs(char *p)
+{
+	int irq;
+	struct irte irte;
+	char *buf = p;
+
+	p += sprintf(p, "IRQ#: P FPD DM RH TM DLM VEC --Dest-ID -SID SQ SVT\n");
+
+	for_each_active_irq(irq) {
+		if (get_irte(irq, &irte))
+			continue;
+		p += sprintf_IRTE(p, irq, &irte);
+	}
+
+	return p - buf;
+}
+
diff --git a/kernel/ksysfs.c b/kernel/ksysfs.c
index 85df7bb..be4e035 100644
--- a/kernel/ksysfs.c
+++ b/kernel/ksysfs.c
@@ -142,7 +142,6 @@ static ssize_t fscaps_show(struct kobject *kobj,
 KERNEL_ATTR_RO(fscaps);
 
 #ifdef CONFIG_X86_IO_APIC
-
 extern int sprintf_IO_APICs(char *p);
 
 static ssize_t ioapic_show(struct kobject *kobj,
@@ -155,18 +154,25 @@ static ssize_t ioapic_store(struct kobject *kobj,
 				   const char *buf, size_t count)
 {
 	return -EINVAL;
-/*
-	unsigned long cnt;
-	int ret;
+}
+KERNEL_ATTR_RW(ioapic);
+#endif
 
-	if (strict_strtoul(buf, 0, &cnt))
-		return -EINVAL;
+#ifdef CONFIG_IRQ_REMAP
+extern int sprintf_IRTEs(char *p);
 
-	ret = crash_shrink_memory(cnt);
-	return ret < 0 ? ret : count;
-*/
+static ssize_t intremap_show(struct kobject *kobj,
+				       struct kobj_attribute *attr, char *buf)
+{
+	return sprintf_IRTEs(buf);
 }
-KERNEL_ATTR_RW(ioapic);
+static ssize_t intremap_store(struct kobject *kobj,
+				   struct kobj_attribute *attr,
+				   const char *buf, size_t count)
+{
+	return -EINVAL;
+}
+KERNEL_ATTR_RW(intremap);
 #endif
 
 /*
@@ -213,6 +219,9 @@ static struct attribute * kernel_attrs[] = {
 #ifdef CONFIG_X86_IO_APIC
 	&ioapic_attr.attr,
 #endif
+#ifdef CONFIG_IRQ_REMAP
+	&intremap_attr.attr,
+#endif
 	NULL
 };
 
-- 
1.7.6.5


--xgyAXRrhYN0wYx8y--
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