[Xen-changelog] [xen master] x86/pvh: change the order of the iommu initialization for Dom0

[patchbot@xxxxxxx]

commit 173c7803592065d27bf2e60d50e08e197a0efa83
Author:     Roger Pau Monné <roger.pau@xxxxxxxxxx>
AuthorDate: Tue Jul 24 15:55:39 2018 +0200
Commit:     Jan Beulich <jbeulich@xxxxxxxx>
CommitDate: Tue Jul 24 15:55:39 2018 +0200

    x86/pvh: change the order of the iommu initialization for Dom0
    
    The iommu initialization will also create MMIO mappings in the Dom0
    p2m, so the paging memory pool needs to be allocated or else iommu
    initialization will fail.
    
    Move the call to init the iommu after the Dom0 p2m has been setup in
    order to solve this.
    
    Note that issues caused by this wrong ordering have only been seen
    when using shadow paging.
    
    Signed-off-by: Roger Pau Monné <roger.pau@xxxxxxxxxx>
    Acked-by: Jan Beulich <jbeulich@xxxxxxxx>
---
 xen/arch/x86/hvm/dom0_build.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/xen/arch/x86/hvm/dom0_build.c b/xen/arch/x86/hvm/dom0_build.c
index 9a833fa4b9..f0cd63b1ec 100644
--- a/xen/arch/x86/hvm/dom0_build.c
+++ b/xen/arch/x86/hvm/dom0_build.c
@@ -1093,8 +1093,6 @@ int __init dom0_construct_pvh(struct domain *d, const 
module_t *image,
 
     printk(XENLOG_INFO "*** Building a PVH Dom%d ***\n", d->domain_id);
 
-    iommu_hwdom_init(d);
-
     rc = pvh_setup_p2m(d);
     if ( rc )
     {
@@ -1102,6 +1100,8 @@ int __init dom0_construct_pvh(struct domain *d, const 
module_t *image,
         return rc;
     }
 
+    iommu_hwdom_init(d);
+
     rc = pvh_load_kernel(d, image, image_headroom, initrd, 
bootstrap_map(image),
                          cmdline, &entry, &start_info);
     if ( rc )
--
generated by git-patchbot for /home/xen/git/xen.git#master

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