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OvmfPkg/Bhyve: use static PCI32Base address 

It's neccessary to allocate a Graphics Stolen Memory area to enable
GPU-Passthrough for integrated Intel GPUs. Therefore, use a new
memory layout with a static Pci32Baseaddress.

Old layout:
	[...        , lowmemlimit] RAM
	[lowmemlimit, 0xE000 0000] PCI Space
New layout:
	[...        , lowmemlimit] RAM
	[lowmemlimit, gsmbase    ] Memory hole (may be absent)
	[gsmbase    , 0xC000 0000] GSM (may be absent)
	[0xC000 0000, 0xE000 0000] PCI Space

Reviewed-by: Peter Grehan <grehan@freebsd.org>
Acked-by: Rebecca Cran <rebecca@bsdio.com>
Signed-off-by: Corvin Köhne <c.koehne@beckhoff.com>
Message-Id: <20210705110842.14088-2-c.koehne@beckhoff.com>
This commit is contained in:
Corvin Köhne 2021-07-05 13:08:42 +02:00 committed by mergify[bot]
parent 1e0c441c92
commit 44ced03798
2 changed files with 5 additions and 3 deletions
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4
OvmfPkg/Bhyve/BhyveX64.dsc
View File

@ -519,8 +519,8 @@
gUefiOvmfPkgTokenSpaceGuid.PcdOvmfHostBridgePciDevId|0
gUefiOvmfPkgTokenSpaceGuid.PcdPciIoBase|0x0
gUefiOvmfPkgTokenSpaceGuid.PcdPciIoSize|0x0
gUefiOvmfPkgTokenSpaceGuid.PcdPciMmio32Base|0x0
gUefiOvmfPkgTokenSpaceGuid.PcdPciMmio32Size|0x0
gUefiOvmfPkgTokenSpaceGuid.PcdPciMmio32Base|0xC0000000
gUefiOvmfPkgTokenSpaceGuid.PcdPciMmio32Size|0x20000000
gUefiOvmfPkgTokenSpaceGuid.PcdPciMmio64Base|0x0
gUefiOvmfPkgTokenSpaceGuid.PcdPciMmio64Size|0x800000000

4
OvmfPkg/Bhyve/PlatformPei/Platform.c
View File

@ -191,7 +191,9 @@ MemMapInitialization (
ASSERT (PciExBarBase <= MAX_UINT32 - SIZE_256MB);
PciBase = (UINT32)(PciExBarBase + SIZE_256MB);
} else {
PciBase = (TopOfLowRam < BASE_2GB) ? BASE_2GB : TopOfLowRam;
PciBase = PcdGet64 (PcdPciMmio32Base);
if (PciBase == 0)
PciBase = (TopOfLowRam < BASE_2GB) ? BASE_2GB : TopOfLowRam;
}
//