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authorShuah Khan <shuah.kh@samsung.com>2013-09-24 15:21:20 -0600
committerJoerg Roedel <joro@8bytes.org>2013-09-25 11:07:04 +0200
commit56fa484969c367e3ae43a012a7b99f75bb4f3bdb (patch)
treec34c0fd586c5a43cc575ee61c0ee67b7e2b1e010 /include/linux/iommu.h
parent04fa2f7f837601903e5fe0f93bc2af8559d8c035 (diff)
iommu: Change iommu driver to call io_page_fault trace event
Change iommu driver call io_page_fault trace event. This iommu_error class event can be enabled to trigger when an iommu error occurs. Trace information includes driver name, device name, iova, and flags. Testing: Added trace calls to iommu_prepare_identity_map() for testing some of the conditions that are hard to trigger. Here is the trace from the testing: swapper/0-1 [003] .... 2.003774: io_page_fault: IOMMU:pci 0000:00:02.0 iova=0x00000000cb800000 flags=0x0002 swapper/0-1 [003] .... 2.004098: io_page_fault: IOMMU:pci 0000:00:1d.0 iova=0x00000000cadc6000 flags=0x0002 swapper/0-1 [003] .... 2.004115: io_page_fault: IOMMU:pci 0000:00:1a.0 iova=0x00000000cadc6000 flags=0x0002 swapper/0-1 [003] .... 2.004129: io_page_fault: IOMMU:pci 0000:00:1f.0 iova=0x0000000000000000 flags=0x0002 Signed-off-by: Shuah Khan <shuah.kh@samsung.com> Signed-off-by: Joerg Roedel <joro@8bytes.org>
Diffstat (limited to 'include/linux/iommu.h')
-rw-r--r--include/linux/iommu.h2
1 files changed, 2 insertions, 0 deletions
diff --git a/include/linux/iommu.h b/include/linux/iommu.h
index 7ea319e95b47..a444c790fa72 100644
--- a/include/linux/iommu.h
+++ b/include/linux/iommu.h
@@ -22,6 +22,7 @@
#include <linux/errno.h>
#include <linux/err.h>
#include <linux/types.h>
+#include <trace/events/iommu.h>
#define IOMMU_READ (1)
#define IOMMU_WRITE (2)
@@ -227,6 +228,7 @@ static inline int report_iommu_fault(struct iommu_domain *domain,
ret = domain->handler(domain, dev, iova, flags,
domain->handler_token);
+ trace_io_page_fault(dev, iova, flags);
return ret;
}