[Xen-devel] [PATCH for-4.13 v2] AMD/IOMMU: honour IR setting while pre-filling DTEs

* [Xen-devel] [PATCH for-4.13 v2] AMD/IOMMU: honour IR setting while pre-filling DTEs
@ 2019-11-26 17:08 Igor Druzhinin
  2019-11-26 17:14 ` Andrew Cooper
  2019-11-27  4:24 ` Jürgen Groß
  0 siblings, 2 replies; 3+ messages in thread
From: Igor Druzhinin @ 2019-11-26 17:08 UTC (permalink / raw)
  To: xen-devel; +Cc: jgross, andrew.cooper3, jbeulich, Igor Druzhinin

IV bit shouldn't be set in DTE if interrupt remapping is not
enabled. It's a regression in behavior of "iommu=no-intremap"
option which otherwise would keep interrupt requests untranslated
for all of the devices in the system regardless of wether it's
described as valid in IVRS or not.

Signed-off-by: Igor Druzhinin <igor.druzhinin@citrix.com>
---
 xen/drivers/passthrough/amd/iommu_init.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/xen/drivers/passthrough/amd/iommu_init.c b/xen/drivers/passthrough/amd/iommu_init.c
index 16e84d4..2b81e38 100644
--- a/xen/drivers/passthrough/amd/iommu_init.c
+++ b/xen/drivers/passthrough/amd/iommu_init.c
@@ -1279,7 +1279,7 @@ static int __init amd_iommu_setup_device_table(
         for ( bdf = 0, size /= sizeof(*dt); bdf < size; ++bdf )
             dt[bdf] = (struct amd_iommu_dte){
                           .v = true,
-                          .iv = true,
+                          .iv = iommu_intremap,
                       };
     }
 
-- 
2.7.4


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