2011-05-03 19:51:18 +02:00
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# HG changeset patch
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# User Wei Wang <wei.wang2@amd.com>
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# Date 1302610857 -3600
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# Node ID dbd98ab2f87facba8117bb881fa2ea5dfdb92960
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# Parent 697ac895c11c6d5d82524de56796cee98fded2a5
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amd iommu: Unmapped interrupt should generate IO page faults.
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This helps us to debug interrupt issues.
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Signed-off-by: Wei Wang <wei.wang2@amd.com>
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2011-05-31 19:35:29 +02:00
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Index: xen-4.1.1-testing/xen/drivers/passthrough/amd/iommu_map.c
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===================================================================
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--- xen-4.1.1-testing.orig/xen/drivers/passthrough/amd/iommu_map.c
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+++ xen-4.1.1-testing/xen/drivers/passthrough/amd/iommu_map.c
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2011-05-03 19:51:18 +02:00
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@@ -327,8 +327,9 @@ void amd_iommu_set_intremap_table(u32 *d
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set_field_in_reg_u32(0xB, entry,
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IOMMU_DEV_TABLE_INT_TABLE_LENGTH_MASK,
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IOMMU_DEV_TABLE_INT_TABLE_LENGTH_SHIFT, &entry);
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- /* ignore unmapped interrupts */
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- set_field_in_reg_u32(IOMMU_CONTROL_ENABLED, entry,
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+
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+ /* unmapped interrupt results io page faults*/
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+ set_field_in_reg_u32(IOMMU_CONTROL_DISABLED, entry,
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IOMMU_DEV_TABLE_INT_TABLE_IGN_UNMAPPED_MASK,
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IOMMU_DEV_TABLE_INT_TABLE_IGN_UNMAPPED_SHIFT, &entry);
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set_field_in_reg_u32(int_valid ? IOMMU_CONTROL_ENABLED :
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