MSFT:*_*_*_CC_FLAGS = /Od will disable build optimization.

Signed-off-by: Sheng Wei <w.sheng@intel.com>
Cc: Ray Ni <ray.ni@intel.com>
Cc: Rangasai V Chaganty <rangasai.v.chaganty@intel.com>
Cc: Jenny Huang <jenny.huang@intel.com>
Cc: Robert Kowalewski <robert.kowalewski@intel.com>
---
 .../VTd/IntelVTdDmarPei/IntelVTdDmar.c        | 43 +++++++++++++------
 1 file changed, 31 insertions(+), 12 deletions(-)

diff --git a/Silicon/Intel/IntelSiliconPkg/Feature/VTd/IntelVTdDmarPei/IntelVTdDmar.c b/Silicon/Intel/IntelSiliconPkg/Feature/VTd/IntelVTdDmarPei/IntelVTdDmar.c
index ae9135010..e1b867973 100644
--- a/Silicon/Intel/IntelSiliconPkg/Feature/VTd/IntelVTdDmarPei/IntelVTdDmar.c
+++ b/Silicon/Intel/IntelSiliconPkg/Feature/VTd/IntelVTdDmarPei/IntelVTdDmar.c
@@ -242,6 +242,7 @@ SubmitQueuedInvalidationDescriptor (
   VTD_IQA_REG    IqaReg;
   VTD_IQT_REG    IqtReg;
   VTD_IQH_REG    IqhReg;
+  UINT64         IQBassAddress;
 
   if (Desc == NULL) {
     return EFI_INVALID_PARAMETER;
@@ -249,19 +250,29 @@ SubmitQueuedInvalidationDescriptor (
 
   VtdUnitBaseAddress = VTdUnitInfo->VtdUnitBaseAddress;
   IqaReg.Uint64 = MmioRead64 (VtdUnitBaseAddress + R_IQA_REG);
-  if (IqaReg.Bits.IQA == 0) {
+  //
+  // Get IQA_REG.IQA (Invalidation Queue Base Address)
+  //
+  IQBassAddress = RShiftU64 (IqaReg.Uint64, 12);
+  if (IQBassAddress == 0) {
     DEBUG ((DEBUG_ERROR,"Invalidation Queue Buffer not ready [0x%lx]\n", IqaReg.Uint64));
     return EFI_NOT_READY;
   }
   IqtReg.Uint64 = MmioRead64 (VtdUnitBaseAddress + R_IQT_REG);
 
-  if (IqaReg.Bits.DW == 0) {
+  //
+  // Check IQA_REG.DW (Descriptor Width)
+  //
+  if ((IqaReg.Uint64 & BIT11) == 0) {
     //
     // 128-bit descriptor
     //
     QueueSize = (UINTN) (1 << (IqaReg.Bits.QS + 8));
-    Qi128Desc = (QI_DESC *) (UINTN) (IqaReg.Bits.IQA << VTD_PAGE_SHIFT);
-    QueueTail = (UINTN) IqtReg.Bits128Desc.QT;
+    Qi128Desc = (QI_DESC *) (UINTN) LShiftU64 (IQBassAddress, VTD_PAGE_SHIFT);
+    //
+    // Get IQT_REG.QT for 128-bit descriptors
+    //
+    QueueTail = (UINTN) (RShiftU64 (IqtReg.Uint64, 4) & 0x7FFF);
     Qi128Desc += QueueTail;
     Qi128Desc->Low = Desc->Uint64[0];
     Qi128Desc->High = Desc->Uint64[1];
@@ -274,14 +285,18 @@ SubmitQueuedInvalidationDescriptor (
             Desc->Uint64[0],
             Desc->Uint64[1]));
 
-    IqtReg.Bits128Desc.QT = QueueTail;
+    IqtReg.Uint64 &= ~(0x7FFF << 4);
+    IqtReg.Uint64 |= LShiftU64 (QueueTail, 4);
   } else {
     //
     // 256-bit descriptor
     //
     QueueSize = (UINTN) (1 << (IqaReg.Bits.QS + 7));
-    Qi256Desc = (QI_256_DESC *) (UINTN) (IqaReg.Bits.IQA << VTD_PAGE_SHIFT);
-    QueueTail = (UINTN) IqtReg.Bits256Desc.QT;
+    Qi256Desc = (QI_256_DESC *) (UINTN) LShiftU64 (IQBassAddress, VTD_PAGE_SHIFT);
+    //
+    // Get IQT_REG.QT for 256-bit descriptors
+    //
+    QueueTail = (UINTN) (RShiftU64 (IqtReg.Uint64, 5) & 0x3FFF);
     Qi256Desc += QueueTail;
     Qi256Desc->Uint64[0] = Desc->Uint64[0];
     Qi256Desc->Uint64[1] = Desc->Uint64[1];
@@ -298,7 +313,8 @@ SubmitQueuedInvalidationDescriptor (
             Desc->Uint64[2],
             Desc->Uint64[3]));
 
-    IqtReg.Bits256Desc.QT = QueueTail;
+    IqtReg.Uint64 &= ~(0x3FFF << 5);
+    IqtReg.Uint64 |= LShiftU64 (QueueTail, 5);
   }
 
   //
@@ -315,10 +331,13 @@ SubmitQueuedInvalidationDescriptor (
     }
 
     IqhReg.Uint64 = MmioRead64 (VtdUnitBaseAddress + R_IQH_REG);
-    if (IqaReg.Bits.DW == 0) {
-      QueueHead = (UINTN) IqhReg.Bits128Desc.QH;
+    //
+    // Check IQA_REG.DW (Descriptor Width) and get IQH_REG.QH
+    //
+    if ((IqaReg.Uint64 & BIT11) == 0) {
+      QueueHead = (UINTN) (RShiftU64 (IqhReg.Uint64, 4) & 0x7FFF);
     } else {
-      QueueHead = (UINTN) IqhReg.Bits256Desc.QH;
+      QueueHead = (UINTN) (RShiftU64 (IqhReg.Uint64, 5) & 0x3FFF);
     }
   } while (QueueTail != QueueHead);
 
@@ -410,7 +429,7 @@ InvalidateIOTLB (
     // Queued Invalidation
     //
     CapReg.Uint64 = MmioRead64 (VTdUnitInfo->VtdUnitBaseAddress + R_CAP_REG);
-    QiDesc.Uint64[0] = QI_IOTLB_DID(0) | QI_IOTLB_DR(CAP_READ_DRAIN(CapReg.Uint64)) | QI_IOTLB_DW(CAP_WRITE_DRAIN(CapReg.Uint64)) | QI_IOTLB_GRAN(1) | QI_IOTLB_TYPE;
+    QiDesc.Uint64[0] = QI_IOTLB_DID(0) | (CapReg.Bits.DRD ? QI_IOTLB_DR(1) : QI_IOTLB_DR(0)) | (CapReg.Bits.DWD ? QI_IOTLB_DW(1) : QI_IOTLB_DW(0)) | QI_IOTLB_GRAN(1) | QI_IOTLB_TYPE;
     QiDesc.Uint64[1] = QI_IOTLB_ADDR(0) | QI_IOTLB_IH(0) | QI_IOTLB_AM(0);
     QiDesc.Uint64[2] = 0;
     QiDesc.Uint64[3] = 0;
-- 
2.26.2.windows.1



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