PCI passthrough support for VGA devices in VirtualBox on FreeBSD

[Sam Fourman Jr.]

Hello List,

would anyone be able to tell me if PCI passthrough is available in
Virtualbox if FreeBSD is the host?
it has been available since version 4.1
http://www.virtualbox.org/manual/ch09.html#idp14053504

I know that this requires a VirtualBox extension pack, and i am not certian
if FreeBSD needs one?
My use case is, I want to pass through a AMD raedon PCI-E graphics card to
a Linux guest.

I built a FreeBSD kernel based on experimental work being done here:
https://wiki.freebsd.org/AMD_GPU

here are excerpts from a dmesg:

info: [drm] Initialized drm 1.1.0 20060810
drmn0: <Tahiti PRO [Radeon HD 7950]> on vgapci0
info: [drm] MSI enabled 1 message(s)
info: [drm] RADEON_IS_PCIE
info: [drm] initializing kernel modesetting (TAHITI 0x1002:0x679A
0x1462:0x2773).
info: [drm] register mmio base: 0xFE700000
info: [drm] register mmio size: 262144
info: [drm] radeon_atrm_get_bios: ===> Try ATRM...
info: [drm] radeon_atrm_get_bios: pci_find_class() found: 0:7:0:0,
vendor=1002, device=679a
info: [drm] radeon_atrm_get_bios: Get ACPI device handle
info: [drm] radeon_acpi_vfct_bios: ===> Try VFCT...
info: [drm] radeon_acpi_vfct_bios: Get "VFCT" ACPI table
info: [drm] radeon_acpi_vfct_bios: Failed to get "VFCT" table: AE_NOT_FOUND
info: [drm] igp_read_bios_from_vram: ===> Try IGP's VRAM...
info: [drm] igp_read_bios_from_vram: VRAM base address: 0xc0000000
info: [drm] igp_read_bios_from_vram: Map address: 0xfffffe00c0000000
(262144 bytes)
info: [drm] igp_read_bios_from_vram: Incorrect BIOS signature: 0x6207
info: [drm] radeon_read_bios: ===> Try PCI Expansion ROM...
vga_pci_map_bios: Mapping BIOS shadow
info: [drm] radeon_read_bios: Map address: 0xfffffe00000c0000 (131072 bytes)
vga_pci_unmap_bios: Unmapping BIOS shadow
info: [drm] ATOM BIOS: 113
drmn0: info: VRAM: 3072M 0x0000000000000000 - 0x00000000BFFFFFFF (3072M
used)
drmn0: info: GTT: 512M 0x00000000C0000000 - 0x00000000DFFFFFFF
info: [drm] Detected VRAM RAM=3072M, BAR=256M
info: [drm] RAM width 384bits DDR
[TTM] Zone  kernel: Available graphics memory: 16714132 kiB
[TTM] Zone   dma32: Available graphics memory: 2097152 kiB



my hope is to use VirtualBox until Behyve supports booting linux guests

Thank you for your help

-- 

Sam Fourman Jr.