Mostly, this is only necessary for devices that the CSM might have native support for, such as VirtIO and NVMe; PciBusDxe will already degrade devices to 32-bit if they have an OpROM.
However, there doesn't seem to be a generic way of requesting PciBusDxe to downgrade specific devices. There's IncompatiblePciDeviceSupportProtocol but that doesn't provide the PCI class information or a handle to the device itself, so there's no simple way to just match on all NVMe devices, for example. Just leave gUefiOvmfPkgTokenSpaceGuid.PcdPciMmio64Size set to zero for CSM builds, until/unless that can be fixed. Signed-off-by: David Woodhouse <dw...@infradead.org> --- OvmfPkg/OvmfPkgIa32X64.dsc | 2 ++ OvmfPkg/OvmfPkgX64.dsc | 2 ++ 2 files changed, 4 insertions(+) diff --git a/OvmfPkg/OvmfPkgIa32X64.dsc b/OvmfPkg/OvmfPkgIa32X64.dsc index 639e33cb28..8fbe601386 100644 --- a/OvmfPkg/OvmfPkgIa32X64.dsc +++ b/OvmfPkg/OvmfPkgIa32X64.dsc @@ -542,8 +542,10 @@ gUefiOvmfPkgTokenSpaceGuid.PcdPciIoSize|0x0 gUefiOvmfPkgTokenSpaceGuid.PcdPciMmio32Base|0x0 gUefiOvmfPkgTokenSpaceGuid.PcdPciMmio32Size|0x0 +!ifndef $(CSM_ENABLE) gUefiOvmfPkgTokenSpaceGuid.PcdPciMmio64Base|0x0 gUefiOvmfPkgTokenSpaceGuid.PcdPciMmio64Size|0x800000000 +!endif gEfiMdePkgTokenSpaceGuid.PcdPlatformBootTimeOut|0 diff --git a/OvmfPkg/OvmfPkgX64.dsc b/OvmfPkg/OvmfPkgX64.dsc index 69a3497c2c..6f15f11220 100644 --- a/OvmfPkg/OvmfPkgX64.dsc +++ b/OvmfPkg/OvmfPkgX64.dsc @@ -541,8 +541,10 @@ gUefiOvmfPkgTokenSpaceGuid.PcdPciIoSize|0x0 gUefiOvmfPkgTokenSpaceGuid.PcdPciMmio32Base|0x0 gUefiOvmfPkgTokenSpaceGuid.PcdPciMmio32Size|0x0 +!ifndef $(CSM_ENABLE) gUefiOvmfPkgTokenSpaceGuid.PcdPciMmio64Base|0x0 gUefiOvmfPkgTokenSpaceGuid.PcdPciMmio64Size|0x800000000 +!endif gEfiMdePkgTokenSpaceGuid.PcdPlatformBootTimeOut|0 -- 2.21.0 -=-=-=-=-=-=-=-=-=-=-=- Groups.io Links: You receive all messages sent to this group. View/Reply Online (#42713): https://edk2.groups.io/g/devel/message/42713 Mute This Topic: https://groups.io/mt/32163538/21656 Group Owner: devel+ow...@edk2.groups.io Unsubscribe: https://edk2.groups.io/g/devel/unsub [arch...@mail-archive.com] -=-=-=-=-=-=-=-=-=-=-=-
