[edk2-devel] [PATCH] MdeModulePkg/Bus/Pci/PciBusDxe: Increase the width of the data read during oprom shadow

[Sumana Venur]

REF: https://bugzilla.tianocore.org/show_bug.cgi?id=2989

Long times spent on shadowing oprom from graphics card to system memory. We are currently using 8 bit read cycles.
This needs to be wider, at least 32bit (even 64bit) reads to reduce the time for oprom shadow

Signed-off-by: Sumana Venur <sumana.venur at intel.com>
---
 MdeModulePkg/Bus/Pci/PciBusDxe/PciOptionRomSupport.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/MdeModulePkg/Bus/Pci/PciBusDxe/PciOptionRomSupport.c b/MdeModulePkg/Bus/Pci/PciBusDxe/PciOptionRomSupport.c
index c994ed5fe3..fe6c7db417 100644
--- a/MdeModulePkg/Bus/Pci/PciBusDxe/PciOptionRomSupport.c
+++ b/MdeModulePkg/Bus/Pci/PciBusDxe/PciOptionRomSupport.c
@@ -521,7 +521,7 @@ LoadOpRomImage (
     //
     PciDevice->PciRootBridgeIo->Mem.Read (
                                       PciDevice->PciRootBridgeIo,
-                                      EfiPciWidthUint8,
+                                      EfiPciWidthUint64,
                                       RomBar,
                                       (UINT32) RomImageSize,
                                       Image
-- 
2.16.2.windows.1



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