Commit-ID: 323f99cbc35c52a65dea9d072b3ecf1e662240d2
Gitweb: http://git.kernel.org/tip/323f99cbc35c52a65dea9d072b3ecf1e662240d2
Author: Tom Lyon <pugs@xxxxxxxxx>
AuthorDate: Fri, 2 Jul 2010 16:56:14 -0400
Committer: Joerg Roedel <joerg.roedel@xxxxxxx>
CommitDate: Mon, 19 Jul 2010 15:44:25 +0200
iommu-api: Extension to check for interrupt remapping
This patch allows IOMMU users to determine whether the
hardware and software support safe, isolated interrupt
remapping. Not all Intel IOMMUs have the hardware, and the
software for AMD is not there yet.
Signed-off-by: Tom Lyon <pugs@xxxxxxxxx>
Signed-off-by: Joerg Roedel <joerg.roedel@xxxxxxx>
---
drivers/pci/intel-iommu.c | 2 ++
include/linux/iommu.h | 1 +
2 files changed, 3 insertions(+), 0 deletions(-)
diff --git a/drivers/pci/intel-iommu.c b/drivers/pci/intel-iommu.c
index c9171be..6a5af18 100644
--- a/drivers/pci/intel-iommu.c
+++ b/drivers/pci/intel-iommu.c
@@ -3698,6 +3698,8 @@ static int intel_iommu_domain_has_cap(struct iommu_domain *domain,
if (cap == IOMMU_CAP_CACHE_COHERENCY)
return dmar_domain->iommu_snooping;
+ if (cap == IOMMU_CAP_INTR_REMAP)
+ return intr_remapping_enabled;
return 0;
}
diff --git a/include/linux/iommu.h b/include/linux/iommu.h
index be22ad8..0a2ba40 100644
--- a/include/linux/iommu.h
+++ b/include/linux/iommu.h
@@ -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);
--
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