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[V3] 2.6.34: simple IOMMU API extension to check safe interrupt remapping

Message ID 4c2e526e.HXT+zIj7fSMwTdy/%pugs@cisco.com (mailing list archive)
State New, archived
Headers show

Commit Message

Tom Lyon July 2, 2010, 8:56 p.m. UTC 
None
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Patch

diff -uprN linux-2.6.34/drivers/pci/intel-iommu.c iommuapi-linux-2.6.34/drivers/pci/intel-iommu.c
--- linux-2.6.34/drivers/pci/intel-iommu.c	2010-05-16 14:17:36.000000000 -0700
+++ iommuapi-linux-2.6.34/drivers/pci/intel-iommu.c	2010-07-02 12:39:19.000000000 -0700
@@ -3705,6 +3705,8 @@  static int intel_iommu_domain_has_cap(st
 
 	if (cap == IOMMU_CAP_CACHE_COHERENCY)
 		return dmar_domain->iommu_snooping;
+	if (cap == IOMMU_CAP_INTR_REMAP)
+		return intr_remapping_enabled;
 
 	return 0;
 }
diff -uprN linux-2.6.34/include/linux/iommu.h iommuapi-linux-2.6.34/include/linux/iommu.h
--- linux-2.6.34/include/linux/iommu.h	2010-05-16 14:17:36.000000000 -0700
+++ iommuapi-linux-2.6.34/include/linux/iommu.h	2010-07-02 12:38:45.000000000 -0700
@@ -30,6 +30,7 @@  struct iommu_domain {
 };
 
 #define IOMMU_CAP_CACHE_COHERENCY	0x1
+#define IOMMU_CAP_INTR_REMAP		0x2	/* isolates device intrs */
 
 struct iommu_ops {
 	int (*domain_init)(struct iommu_domain *domain);