From: Igor Druzhinin <igor.druzhinin@citrix.com>
Date: Tue, 26 Nov 2019 17:08:19 +0000 (+0000)
Subject: AMD/IOMMU: honour IR setting while pre-filling DTEs
X-Git-Tag: archive/raspbian/4.14.0+80-gd101b417b7-1+rpi1^2~63^2~1144
X-Git-Url: https://dgit.raspbian.org/?a=commitdiff_plain;h=195b79a97e6721ba8830036f47d2454545f32e44;p=xen.git

AMD/IOMMU: honour IR setting while pre-filling DTEs

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>
Reviewed-by: Andrew Cooper <andrew.cooper3@citrix.com>
Release-acked-by: Juergen Gross <jgross@suse.com>
---

diff --git a/xen/drivers/passthrough/amd/iommu_init.c b/xen/drivers/passthrough/amd/iommu_init.c
index 16e84d43d4..2b81e38f16 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,
                       };
     }