File 23199-amd-iommu-unmapped-intr-fault.patch of Package xen

Overview Repositories Revisions Requests Users Attributes Meta

File 23199-amd-iommu-unmapped-intr-fault.patch of Package xen (Revision 0fdcd5cd85127a9deedcfac1fb86283d)

Currently displaying revision 0fdcd5cd85127a9deedcfac1fb86283d , Show latest

# HG changeset patch
# User Wei Wang <wei.wang2@amd.com>
# Date 1302610857 -3600
# Node ID dbd98ab2f87facba8117bb881fa2ea5dfdb92960
# Parent  697ac895c11c6d5d82524de56796cee98fded2a5
amd iommu: Unmapped interrupt should generate IO page faults.

This helps us to debug interrupt issues.

Signed-off-by: Wei Wang <wei.wang2@amd.com>

--- a/xen/drivers/passthrough/amd/iommu_map.c
+++ b/xen/drivers/passthrough/amd/iommu_map.c
@@ -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 :

Places

File 23199-amd-iommu-unmapped-intr-fault.patch of Package xen (Revision 0fdcd5cd85127a9deedcfac1fb86283d)

Places