[Xen-changelog] [xen staging] AMD/IOMMU: split amd_iommu_init_one()

[patchbot@xxxxxxx]

commit 21600515305dbecd2ae70d7b2ce936a9c200475f
Author:     Jan Beulich <jbeulich@xxxxxxxx>
AuthorDate: Wed Jul 31 13:18:20 2019 +0200
Commit:     Jan Beulich <jbeulich@xxxxxxxx>
CommitDate: Wed Jul 31 13:18:20 2019 +0200

    AMD/IOMMU: split amd_iommu_init_one()
    
    Mapping the MMIO space and obtaining feature information needs to happen
    slightly earlier, such that for x2APIC support we can set XTEn prior to
    calling amd_iommu_update_ivrs_mapping_acpi() and
    amd_iommu_setup_ioapic_remapping().
    
    Signed-off-by: Jan Beulich <jbeulich@xxxxxxxx>
    Reviewed-by: Andrew Cooper <andrew.cooper3@xxxxxxxxxx>
    Acked-by: Brian Woods <brian.woods@xxxxxxx>
---
 xen/drivers/passthrough/amd/iommu_init.c | 27 ++++++++++++++++++---------
 1 file changed, 18 insertions(+), 9 deletions(-)

diff --git a/xen/drivers/passthrough/amd/iommu_init.c 
b/xen/drivers/passthrough/amd/iommu_init.c
index 61c63e18e9..bc7e4270c7 100644
--- a/xen/drivers/passthrough/amd/iommu_init.c
+++ b/xen/drivers/passthrough/amd/iommu_init.c
@@ -969,14 +969,6 @@ static void * __init allocate_ppr_log(struct amd_iommu 
*iommu)
 
 static int __init amd_iommu_init_one(struct amd_iommu *iommu)
 {
-    if ( map_iommu_mmio_region(iommu) != 0 )
-        goto error_out;
-
-    get_iommu_features(iommu);
-
-    if ( iommu->features.raw )
-        iommuv2_enabled = 1;
-
     if ( allocate_cmd_buffer(iommu) == NULL )
         goto error_out;
 
@@ -1201,6 +1193,23 @@ static bool_t __init amd_sp5100_erratum28(void)
     return 0;
 }
 
+static int __init amd_iommu_prepare_one(struct amd_iommu *iommu)
+{
+    int rc = alloc_ivrs_mappings(iommu->seg);
+
+    if ( !rc )
+        rc = map_iommu_mmio_region(iommu);
+    if ( rc )
+        return rc;
+
+    get_iommu_features(iommu);
+
+    if ( iommu->features.raw )
+        iommuv2_enabled = true;
+
+    return 0;
+}
+
 int __init amd_iommu_init(void)
 {
     struct amd_iommu *iommu;
@@ -1231,7 +1240,7 @@ int __init amd_iommu_init(void)
     radix_tree_init(&ivrs_maps);
     for_each_amd_iommu ( iommu )
     {
-        rc = alloc_ivrs_mappings(iommu->seg);
+        rc = amd_iommu_prepare_one(iommu);
         if ( rc )
             goto error_out;
     }
--
generated by git-patchbot for /home/xen/git/xen.git#staging

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