From bff6584d1f0d366ea08fb541ecbe82554f1eaa4e Mon Sep 17 00:00:00 2001 From: Ruiyu Ni Date: Fri, 21 Sep 2018 15:20:45 +0800 Subject: [PATCH] MdeModulePkg/PciHostBridge: Fix a bug that prevents PMEM access REF: https://bugzilla.tianocore.org/show_bug.cgi?id=1196 RootBridgeIoCheckParameter() verifies that the requested MMIO access can fit in any of the MEM/PMEM 32/64 ranges. But today's logic somehow only checks the requested access against MEM 32/64 ranges. It should also check the requested access against PMEM 32/64 ranges. The patch fixes this issue. Contributed-under: TianoCore Contribution Agreement 1.1 Signed-off-by: Ruiyu Ni Reviewed-by: Star Zeng Reviewed-by: Laszlo Ersek Reviewed-by: Garrett Kirkendall --- .../Bus/Pci/PciHostBridgeDxe/PciRootBridgeIo.c | 14 ++++++++++---- 1 file changed, 10 insertions(+), 4 deletions(-) diff --git a/MdeModulePkg/Bus/Pci/PciHostBridgeDxe/PciRootBridgeIo.c b/MdeModulePkg/Bus/Pci/PciHostBridgeDxe/PciRootBridgeIo.c index 2c373e41de..87385aa172 100644 --- a/MdeModulePkg/Bus/Pci/PciHostBridgeDxe/PciRootBridgeIo.c +++ b/MdeModulePkg/Bus/Pci/PciHostBridgeDxe/PciRootBridgeIo.c @@ -413,12 +413,18 @@ RootBridgeIoCheckParameter ( // By comparing the Address against Limit we know which range to be used // for checking // - if (Address + Length <= RootBridge->Mem.Limit + 1) { - Base = RootBridge->Mem.Base; + if ((Address >= RootBridge->Mem.Base) && (Address + Length <= RootBridge->Mem.Limit + 1)) { + Base = RootBridge->Mem.Base; Limit = RootBridge->Mem.Limit; - } else { - Base = RootBridge->MemAbove4G.Base; + } else if ((Address >= RootBridge->PMem.Base) && (Address + Length <= RootBridge->PMem.Limit + 1)) { + Base = RootBridge->PMem.Base; + Limit = RootBridge->PMem.Limit; + } else if ((Address >= RootBridge->MemAbove4G.Base) && (Address + Length <= RootBridge->MemAbove4G.Limit + 1)) { + Base = RootBridge->MemAbove4G.Base; Limit = RootBridge->MemAbove4G.Limit; + } else { + Base = RootBridge->PMemAbove4G.Base; + Limit = RootBridge->PMemAbove4G.Limit; } } else { PciRbAddr = (EFI_PCI_ROOT_BRIDGE_IO_PROTOCOL_PCI_ADDRESS*) &Address;