fe4049471b
Parse QEMU_PCI_BRIDGE_CAPABILITY_RESOURCE_RESERVATION from the bridges'
conventional config spaces. Translate the fields as follows:
* BusNumbers:
* 0 -- no reservation;
* (-1) -- firmware default, i.e. no reservation;
* otherwise -- reserve the requested value. (NB, bus number reservation
is not supposed to work before
<https://bugzilla.tianocore.org/show_bug.cgi?id=656> is fixed.)
* Io:
* 0 -- no reservation;
* (-1) -- keep our current default (512B);
* otherwise -- round up the requested value and reserve that.
* NonPrefetchable32BitMmio:
* 0 -- no reservation;
* (-1) -- keep our current default (2MB);
* otherwise -- round up the requested value and reserve that.
* Prefetchable32BitMmio:
* 0 -- no reservation, proceed to Prefetchable64BitMmio;
* (-1) -- firmware default, i.e. no reservation, proceed to
Prefetchable64BitMmio;
* otherwise -- round up the requested value and reserve that. (NB, if
Prefetchable32BitMmio is reserved in addition to
NonPrefetchable32BitMmio, then PciBusDxe currently runs into an
assertion failure. Refer to
<https://bugzilla.tianocore.org/show_bug.cgi?id=720>.)
* Prefetchable64BitMmio:
* only reached if Prefetchable32BitMmio was not reserved;
* 0 -- no reservation;
* (-1) -- firmware default, i.e. no reservation;
* otherwise -- round up the requested value and reserve that.
If QEMU_PCI_BRIDGE_CAPABILITY_RESOURCE_RESERVATION is missing, plus any
time the rounding fails, fall back to the current defaults.
Cc: Jordan Justen <jordan.l.justen@intel.com>
Cc: Marcel Apfelbaum <marcel@redhat.com>
Cc: Ruiyu Ni <ruiyu.ni@intel.com>
Contributed-under: TianoCore Contribution Agreement 1.1
Signed-off-by: Laszlo Ersek <lersek@redhat.com>
Reviewed-by: Jordan Justen <jordan.l.justen@intel.com>
47 lines
1.3 KiB
INI
47 lines
1.3 KiB
INI
## @file
|
|
# This driver implements EFI_PCI_HOT_PLUG_INIT_PROTOCOL, providing the PCI bus
|
|
# driver with resource padding information, for PCIe hotplug purposes.
|
|
#
|
|
# Copyright (C) 2016, Red Hat, Inc.
|
|
#
|
|
# This program and the accompanying materials are licensed and made available
|
|
# under the terms and conditions of the BSD License which accompanies this
|
|
# distribution. The full text of the license may be found at
|
|
# http://opensource.org/licenses/bsd-license.php
|
|
#
|
|
# THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS, WITHOUT
|
|
# WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
|
|
##
|
|
|
|
[Defines]
|
|
INF_VERSION = 0x00010005
|
|
BASE_NAME = PciHotPlugInitDxe
|
|
FILE_GUID = 11A6EDF6-A9BE-426D-A6CC-B22FE51D9224
|
|
MODULE_TYPE = DXE_DRIVER
|
|
VERSION_STRING = 1.0
|
|
ENTRY_POINT = DriverInitialize
|
|
|
|
[Sources]
|
|
PciHotPlugInit.c
|
|
|
|
[Packages]
|
|
MdeModulePkg/MdeModulePkg.dec
|
|
MdePkg/MdePkg.dec
|
|
OvmfPkg/OvmfPkg.dec
|
|
|
|
[LibraryClasses]
|
|
BaseLib
|
|
BaseMemoryLib
|
|
DebugLib
|
|
DevicePathLib
|
|
MemoryAllocationLib
|
|
PciLib
|
|
UefiBootServicesTableLib
|
|
UefiDriverEntryPoint
|
|
|
|
[Protocols]
|
|
gEfiPciHotPlugInitProtocolGuid ## ALWAYS_PRODUCES
|
|
|
|
[Depex]
|
|
TRUE
|