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[v2,2/3] OvmfPkg/XenSupport: use a correct PCI host bridge aperture for BAR64

Message ID 1554779560-26204-3-git-send-email-igor.druzhinin@citrix.com (mailing list archive)
State Superseded
Headers show
Series Xen PCI passthrough fixes | expand

Commit Message

Igor Druzhinin April 9, 2019, 3:12 a.m. UTC 
In case BAR64 is placed below 4G choose the correct aperture.
This fixes a failed assertion down the code path.

Contributed-under: TianoCore Contribution Agreement 1.1
Acked-by: Anthony PERARD <anthony.perard@citrix.com>
Signed-off-by: Igor Druzhinin <igor.druzhinin@citrix.com>
---
 OvmfPkg/Library/PciHostBridgeLib/XenSupport.c | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)
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Patch

diff --git a/OvmfPkg/Library/PciHostBridgeLib/XenSupport.c b/OvmfPkg/Library/PciHostBridgeLib/XenSupport.c
index 5ea63f7..f763134 100644
--- a/OvmfPkg/Library/PciHostBridgeLib/XenSupport.c
+++ b/OvmfPkg/Library/PciHostBridgeLib/XenSupport.c
@@ -143,7 +143,11 @@  PcatPciRootBridgeParseBars (
           Length = Length | LShiftU64 ((UINT64) UpperValue, 32);
           Length = (~Length) + 1;
 
-          MemAperture = MemAbove4G;
+          if (Base < BASE_4GB) {
+            MemAperture = Mem;
+          } else {
+            MemAperture = MemAbove4G;
+          }
         }
 
         Limit = Base + Length - 1;