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OvmfPkg: Allow runtime control of IPv4 and IPv6 support on QEMU 

Wire up the newly added UefiDriverEntrypoint in a way that ties dispatch
of the Ip4Dxe and Ip6Dxe drivers to QEMU fw_cfg variables
'opt/org.tianocore/IPv4Support' and 'opt/org.tianocore/IPv6Support'
respectively.

Setting both variables to 'n' disables IP based networking entirely,
without the need for additional code changes at the NIC driver or
network boot protocol level.

Signed-off-by: Ard Biesheuvel <ardb@kernel.org>
Acked-by: Gerd Hoffmann <kraxel@redhat.com>
This commit is contained in:
Ard Biesheuvel 2022-08-15 11:17:12 +02:00 committed by mergify[bot]
parent d933ec115b
commit 970e262949
1 changed files with 18 additions and 0 deletions
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18
OvmfPkg/NetworkComponents.dsc.inc
View File

@ -14,4 +14,22 @@
NULL|OvmfPkg/Library/TlsAuthConfigLib/TlsAuthConfigLib.inf NULL|OvmfPkg/Library/TlsAuthConfigLib/TlsAuthConfigLib.inf
} }
!endif !endif
!if $(NETWORK_IP4_ENABLE) == TRUE
NetworkPkg/Ip4Dxe/Ip4Dxe.inf {
<LibraryClasses>
UefiDriverEntryPoint|OvmfPkg/Library/UefiDriverEntryPointFwCfgOverrideLib/UefiDriverEntryPointFwCfgOverrideLib.inf
<PcdsFixedAtBuild>
gUefiOvmfPkgTokenSpaceGuid.PcdEntryPointOverrideFwCfgVarName|"opt/org.tianocore/IPv4Support"
}
!endif
!if $(NETWORK_IP6_ENABLE) == TRUE
NetworkPkg/Ip6Dxe/Ip6Dxe.inf {
<LibraryClasses>
UefiDriverEntryPoint|OvmfPkg/Library/UefiDriverEntryPointFwCfgOverrideLib/UefiDriverEntryPointFwCfgOverrideLib.inf
<PcdsFixedAtBuild>
gUefiOvmfPkgTokenSpaceGuid.PcdEntryPointOverrideFwCfgVarName|"opt/org.tianocore/IPv6Support"
}
!endif
!endif !endif