0007-libxl-plug-workaround-for-missing-pcidev-group-assig.patch

From a103c37f81f37d7c049b3ba524234577dbb898e3 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Marek=20Marczykowski-G=C3=B3recki?=
 <marmarek@invisiblethingslab.com>
Date: Sat, 28 Nov 2015 18:27:59 +0100
Subject: [PATCH] libxl: plug workaround for missing pcidev group assignment to
 'nostrictreset' option
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Organization: Invisible Things Lab
Cc: Marek Marczykowski-Górecki <marmarek@invisiblethingslab.com>

From commit in xen tree:
commit 11d942df114045860a27563418cf5dbd5bcd0402
Author: Tiejun Chen <tiejun.chen@intel.com>
Date:   Mon Sep 14 13:42:34 2015 +0200

    vtd/iommu: permit group devices to passthrough in relaxed mode

    Currently we don't allow passing through any group devices which are
    sharing same RMRR entry since it would break security among VMs. And
    indeed, we expect we can figure out a better way to handle this kind
    of case completely.

    But before the group assignment gets implemented, we might make this
    permission dependent on our RMRR policy. So, now it would be allowed
    in the relaxed mode.

nostrictreset isn't the best place to put such workaround, but it is
similar in consequences (weaken PCI passthrough).

Signed-off-by: Marek Marczykowski-Górecki <marmarek@invisiblethingslab.com>
---
 src/libxl/libxl_conf.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/src/libxl/libxl_conf.c b/src/libxl/libxl_conf.c
index 866386f2ef..0b2ea0331e 100644
--- a/src/libxl/libxl_conf.c
+++ b/src/libxl/libxl_conf.c
@@ -2303,6 +2303,9 @@ libxlMakePCI(virDomainHostdevDefPtr hostdev, libxl_device_pci *pcidev)
     pcidev->bus = pcisrc->addr.bus;
     pcidev->dev = pcisrc->addr.slot;
     pcidev->func = pcisrc->addr.function;
+    /* there is no LIBXL_HAVE_xxx for this field... */
+    if (hostdev->nostrictreset)
+        pcidev->rdm_policy = LIBXL_RDM_RESERVE_POLICY_RELAXED;
 
     return 0;
 }
-- 
2.25.4