From: Wei Wang2 <wei.wang2@amd.com>
To: "xen-devel@lists.xensource.com" <xen-devel@lists.xensource.com>
Subject: [PATCH] AMD IOMMU: Unmapped interrupt should result io page fault
Date: Fri, 8 Apr 2011 14:13:43 +0200 [thread overview]
Message-ID: <201104081413.43427.wei.wang2@amd.com> (raw)
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This could help us to debug interrupt related issues.
Thanks,
Wei
--
Advanced Micro Devices GmbH
Sitz: Dornach, Gemeinde Aschheim,
Landkreis München Registergericht München,
HRB Nr. 43632
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Geschäftsführer:
Alberto Bozzo, Andrew Bowd
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# HG changeset patch
# User Wei Wang <wei.wang2@amd.com>
# Node ID 2bd2f621160b93a9f8cb6e21fd1a984d7ae2f51d
# Parent ab2944070ca99790546b34fa04a80103d3e7464f
Unmapped interrupt should generate IO page faults. This helps us to debug interrupt issues.
Signed-off-by Wei Wang <wei.wang2@amd.com>
diff -r ab2944070ca9 -r 2bd2f621160b xen/drivers/passthrough/amd/iommu_map.c
--- a/xen/drivers/passthrough/amd/iommu_map.c Fri Apr 08 12:35:48 2011 +0200
+++ b/xen/drivers/passthrough/amd/iommu_map.c Fri Apr 08 13:54:28 2011 +0200
@@ -327,8 +327,9 @@ void amd_iommu_set_intremap_table(u32 *d
set_field_in_reg_u32(0xB, entry,
IOMMU_DEV_TABLE_INT_TABLE_LENGTH_MASK,
IOMMU_DEV_TABLE_INT_TABLE_LENGTH_SHIFT, &entry);
- /* ignore unmapped interrupts */
- set_field_in_reg_u32(IOMMU_CONTROL_ENABLED, entry,
+
+ /* unmapped interrupt results io page faults*/
+ set_field_in_reg_u32(IOMMU_CONTROL_DISABLED, entry,
IOMMU_DEV_TABLE_INT_TABLE_IGN_UNMAPPED_MASK,
IOMMU_DEV_TABLE_INT_TABLE_IGN_UNMAPPED_SHIFT, &entry);
set_field_in_reg_u32(int_valid ? IOMMU_CONTROL_ENABLED :
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