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The "OvmfPkg/Library/PciHostBridgeLib/PciHostBridgeLib.inf" instance is used by the following platforms in edk2: OvmfPkg/AmdSev/AmdSevX64.dsc OvmfPkg/OvmfPkgIa32.dsc OvmfPkg/OvmfPkgIa32X64.dsc OvmfPkg/OvmfPkgX64.dsc All these platforms statically inherit PcdPciDisableBusEnumeration=FALSE from "MdeModulePkg.dec". Remove the the PCD and everything that depends on it from the PciHostBridgeLib instance. Namely, remove the logic that determines the root bridge apertures by (a) scanning the entire bus, device and function number space, and (b) parsing the BAR values that were pre-set by the Bhyve or Xen machinery. "XenSupport.c" used to be listed explicitly in "Maintainers.txt", remove it from that spot too. Cc: Andrew Fish <afish@apple.com> Cc: Ard Biesheuvel <ardb+tianocore@kernel.org> Cc: Jordan Justen <jordan.l.justen@intel.com> Cc: Leif Lindholm <leif@nuviainc.com> Cc: Michael D Kinney <michael.d.kinney@intel.com> Cc: Philippe Mathieu-Daudé <philmd@redhat.com> Ref: https://bugzilla.tianocore.org/show_bug.cgi?id=2122 Signed-off-by: Laszlo Ersek <lersek@redhat.com> Message-Id: <20210526201446.12554-33-lersek@redhat.com> Reviewed-by: Ard Biesheuvel <ardb@kernel.org> Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com> Reviewed-by: Leif Lindholm <leif@nuviainc.com>
128 lines
4.1 KiB
C
128 lines
4.1 KiB
C
/** @file
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OVMF's instance of the PCI Host Bridge Library.
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Copyright (C) 2016, Red Hat, Inc.
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Copyright (c) 2016, Intel Corporation. All rights reserved.<BR>
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SPDX-License-Identifier: BSD-2-Clause-Patent
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**/
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#include <IndustryStandard/Pci.h> // PCI_MAX_BUS
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#include <IndustryStandard/Q35MchIch9.h> // INTEL_Q35_MCH_DEVIC...
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#include <Library/BaseMemoryLib.h> // ZeroMem()
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#include <Library/PcdLib.h> // PcdGet64()
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#include <Library/PciHostBridgeLib.h> // PCI_ROOT_BRIDGE_APE...
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#include <Library/PciHostBridgeUtilityLib.h> // PciHostBridgeUtilit...
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#include <Protocol/PciHostBridgeResourceAllocation.h> // EFI_PCI_HOST_BRIDGE...
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#include <Protocol/PciRootBridgeIo.h> // EFI_PCI_ATTRIBUTE_I...
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STATIC PCI_ROOT_BRIDGE_APERTURE mNonExistAperture = { MAX_UINT64, 0 };
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/**
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Return all the root bridge instances in an array.
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@param Count Return the count of root bridge instances.
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@return All the root bridge instances in an array.
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The array should be passed into PciHostBridgeFreeRootBridges()
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when it's not used.
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**/
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PCI_ROOT_BRIDGE *
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EFIAPI
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PciHostBridgeGetRootBridges (
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UINTN *Count
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)
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{
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UINT64 Attributes;
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UINT64 AllocationAttributes;
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PCI_ROOT_BRIDGE_APERTURE Io;
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PCI_ROOT_BRIDGE_APERTURE Mem;
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PCI_ROOT_BRIDGE_APERTURE MemAbove4G;
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ZeroMem (&Io, sizeof (Io));
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ZeroMem (&Mem, sizeof (Mem));
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ZeroMem (&MemAbove4G, sizeof (MemAbove4G));
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Attributes = EFI_PCI_ATTRIBUTE_IDE_PRIMARY_IO |
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EFI_PCI_ATTRIBUTE_IDE_SECONDARY_IO |
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EFI_PCI_ATTRIBUTE_ISA_IO_16 |
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EFI_PCI_ATTRIBUTE_ISA_MOTHERBOARD_IO |
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EFI_PCI_ATTRIBUTE_VGA_MEMORY |
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EFI_PCI_ATTRIBUTE_VGA_IO_16 |
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EFI_PCI_ATTRIBUTE_VGA_PALETTE_IO_16;
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AllocationAttributes = EFI_PCI_HOST_BRIDGE_COMBINE_MEM_PMEM;
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if (PcdGet64 (PcdPciMmio64Size) > 0) {
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AllocationAttributes |= EFI_PCI_HOST_BRIDGE_MEM64_DECODE;
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MemAbove4G.Base = PcdGet64 (PcdPciMmio64Base);
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MemAbove4G.Limit = PcdGet64 (PcdPciMmio64Base) +
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PcdGet64 (PcdPciMmio64Size) - 1;
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} else {
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CopyMem (&MemAbove4G, &mNonExistAperture, sizeof (mNonExistAperture));
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}
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Io.Base = PcdGet64 (PcdPciIoBase);
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Io.Limit = PcdGet64 (PcdPciIoBase) + (PcdGet64 (PcdPciIoSize) - 1);
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Mem.Base = PcdGet64 (PcdPciMmio32Base);
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Mem.Limit = PcdGet64 (PcdPciMmio32Base) + (PcdGet64 (PcdPciMmio32Size) - 1);
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return PciHostBridgeUtilityGetRootBridges (
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Count,
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Attributes,
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AllocationAttributes,
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FALSE,
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PcdGet16 (PcdOvmfHostBridgePciDevId) != INTEL_Q35_MCH_DEVICE_ID,
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0,
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PCI_MAX_BUS,
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&Io,
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&Mem,
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&MemAbove4G,
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&mNonExistAperture,
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&mNonExistAperture
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);
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}
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/**
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Free the root bridge instances array returned from
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PciHostBridgeGetRootBridges().
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@param The root bridge instances array.
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@param The count of the array.
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**/
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VOID
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EFIAPI
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PciHostBridgeFreeRootBridges (
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PCI_ROOT_BRIDGE *Bridges,
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UINTN Count
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)
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{
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PciHostBridgeUtilityFreeRootBridges (Bridges, Count);
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}
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/**
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Inform the platform that the resource conflict happens.
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@param HostBridgeHandle Handle of the Host Bridge.
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@param Configuration Pointer to PCI I/O and PCI memory resource
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descriptors. The Configuration contains the resources
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for all the root bridges. The resource for each root
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bridge is terminated with END descriptor and an
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additional END is appended indicating the end of the
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entire resources. The resource descriptor field
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values follow the description in
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EFI_PCI_HOST_BRIDGE_RESOURCE_ALLOCATION_PROTOCOL
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.SubmitResources().
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**/
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VOID
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EFIAPI
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PciHostBridgeResourceConflict (
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EFI_HANDLE HostBridgeHandle,
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VOID *Configuration
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)
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{
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PciHostBridgeUtilityResourceConflict (Configuration);
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}
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