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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>
EDK II Project
A modern, feature-rich, cross-platform firmware development environment for the UEFI and PI specifications from www.uefi.org.
Contributions to the EDK II open source project are covered by the TianoCore Contribution Agreement 1.1
The majority of the content in the EDK II open source project uses a BSD 2-Clause License. The EDK II open source project contains the following components that are covered by additional licenses:
- AppPkg/Applications/Python/Python-2.7.2/Tools/pybench
- AppPkg/Applications/Python/Python-2.7.2
- AppPkg/Applications/Python/Python-2.7.10
- BaseTools/Source/C/BrotliCompress
- MdeModulePkg/Library/BrotliCustomDecompressLib
- OvmfPkg
- CryptoPkg/Library/OpensslLib/openssl
The EDK II Project is composed of packages. The maintainers for each package are listed in Maintainers.txt.