[tip:x86/urgent] iommu, x86: Add DMA remap fault reason

[tip-bot for Li, Zhen-Hua]

Commit-ID:  4ecccd9edd5eb4dd185486e6e593c671484691bc
Gitweb:     http://git.kernel.org/tip/4ecccd9edd5eb4dd185486e6e593c671484691bc
Author:     Li, Zhen-Hua <zhen-hual@xxxxxx>
AuthorDate: Wed, 6 Mar 2013 10:43:17 +0800
Committer:  Ingo Molnar <mingo@xxxxxxxxxx>
CommitDate: Wed, 6 Mar 2013 09:41:51 +0100

iommu, x86: Add DMA remap fault reason

The number of DMA fault reasons in intel's document are from 1
to 0xD, but in dmar.c fault reason 0xD is not printed out.

In this document:

 "Intel Virtualization Technology for Directed I/O Architecture Specification"
 http://download.intel.com/technology/computing/vptech/Intel(r)_VT_for_Direct_IO.pdf

Chapter 4. Support For Device-IOTLBs

Table 6. Unsuccessful Translated Requests

There is fault reason for 0xD not listed in kernel:

    Present context-entry used to process translation request
    specifies blocking of Translation Requests (Translation Type (T)
    field value not equal to 01b).

This patch adds reason 0xD as well.

Signed-off-by: Li, Zhen-Hua <zhen-hual@xxxxxx>
Cc: Joerg Roedel <joro@xxxxxxxxxx>
Cc: Donald Dutile <ddutile@xxxxxxxxxx>
Cc: Suresh Siddha <suresh.b.siddha@xxxxxxxxx>
Cc: Hannes Reinecke <hare@xxxxxxx>
Link: http://lkml.kernel.org/r/1362537797-6034-1-git-send-email-zhen-hual@xxxxxx
Signed-off-by: Ingo Molnar <mingo@xxxxxxxxxx>
---
 drivers/iommu/dmar.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/iommu/dmar.c b/drivers/iommu/dmar.c
index dc7e478..e5cdaf8 100644
--- a/drivers/iommu/dmar.c
+++ b/drivers/iommu/dmar.c
@@ -1083,6 +1083,7 @@ static const char *dma_remap_fault_reasons[] =
 	"non-zero reserved fields in RTP",
 	"non-zero reserved fields in CTP",
 	"non-zero reserved fields in PTE",
+	"PCE for translation request specifies blocking",
 };
 
 static const char *irq_remap_fault_reasons[] =
--
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