[PATCH v4 3/4] dom0/pvh: change the order of the MMCFG initialization

[Roger Pau Monne <roger.pau@citrix.com>]

So it's done before the iommu is initialized. This is required in
order to be able to fetch the MMCFG regions from the domain struct.

No functional change.

Signed-off-by: Roger Pau Monné <roger.pau@citrix.com>
---
Changes since v1:
 - New in this version.
---
Cc: Jan Beulich <jbeulich@suse.com>
Cc: Andrew Cooper <andrew.cooper3@citrix.com>
---
 xen/arch/x86/hvm/dom0_build.c | 9 +++++++--
 1 file changed, 7 insertions(+), 2 deletions(-)

diff --git a/xen/arch/x86/hvm/dom0_build.c b/xen/arch/x86/hvm/dom0_build.c
index f0cd63b1ec..5065729106 100644
--- a/xen/arch/x86/hvm/dom0_build.c
+++ b/xen/arch/x86/hvm/dom0_build.c
@@ -1100,6 +1100,13 @@ int __init dom0_construct_pvh(struct domain *d, const module_t *image,
         return rc;
     }
 
+    /*
+     * NB: MMCFG initialization needs to be performed before iommu
+     * initialization so the iommu code can fetch the MMCFG regions used by the
+     * domain.
+     */
+    pvh_setup_mmcfg(d);
+
     iommu_hwdom_init(d);
 
     rc = pvh_load_kernel(d, image, image_headroom, initrd, bootstrap_map(image),
@@ -1124,8 +1131,6 @@ int __init dom0_construct_pvh(struct domain *d, const module_t *image,
         return rc;
     }
 
-    pvh_setup_mmcfg(d);
-
     printk("WARNING: PVH is an experimental mode with limited functionality\n");
     return 0;
 }
-- 
2.18.0


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