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From: | Andrew Barnes |
Subject: | Re: [Qemu-devel] [Xen-devel] [v5][PATCH 0/5] xen: add Intel IGD passthrough support |
Date: | Tue, 8 Jul 2014 11:45:25 +0100 |
V5 is generated just based on Paolo's some comments.
v5:
* Don't set that ISA class property, instead, just fake this ISA bridge
with 00:1f.0.
* Don't pass vendor/device ids in igd_pci_read().
* Add to support offset 0x44/0x48.
* Just rebase.
v4:
* Fix some typos in the patch head description.
* Improve some comments.
* Given that xen_pt_register_vga_regions()/xen_pt_unregister_vga_regions()
are called unconditionally, so we just return 0 there.
* Remove one spurious change.
* Remove some unnecessary "return" in void foo().
* Given that pci_create_pch() is called unconditionally, so we just return 0
even if its failed to check xen_has_gfx_passthru.
* Use (xen_enabled() && xen_has_gfx_passthru) to make sure we only work
in this scenario.
v3:
* In this case, as we discussed we will give priority to devices to
reserve a specific devfn by passing
"device_model_args_hvm = ['-device', 'xen-platform,addr=0x3']" and
"vga=none", so withdraw patch #1, #2 and #4.
* Fix some typos.
* Add more comments to make that readable.
* To unmap igd_opregion when call xen_pt_unregister_vga_regions().
* Improve some return paths.
* Force to convert igd_guest/host_opoegion as an unsigned long type
while calling xc_domain_memory_mapping().
* We need to map 3 pages for opregion as hvmloader set.
v2:
* rebase on current qemu tree.
* retrieve VGA bios from sysfs properly.
* redefine some function name.
* introduce bitmap to manage registe/runregister pci dev, and provide
a common way to reserve some specific devfn.
* introduce is_igd_passthrough() to make sure we touch physical host
bridge only in IGD case.
* We should return zero as an invalid address value while calling
igd_read_opregion().
Additionally, now its also not necessary to recompile seabios with some
extra steps like v1.
The following patches are ported partially from Xen Qemu-traditional
branch which are adding Intel IGD passthrough supporting to Qemu upstream.
To pass through IGD to guest, user need to add following lines in Xen
config file:
gfx_passthru=1
pci=['00:address@hidden']
Now successfully boot Ubuntu 14.04/Windows 7 guests with IGD assigned in
Haswell desktop with Latest Xen + Qemu upstream.
----------------------------------------------------------------
Tiejun Chen (5):
xen, gfx passthrough: basic graphics passthrough support
xen, gfx passthrough: create pseudo intel isa bridge
xen, gfx passthrough: support Intel IGD passthrough with VT-D
xen, gfx passthrough: create host bridge to passthrough
xen, gfx passthrough: add opregion mapping
hw/pci-host/piix.c | 56 +++++++++++++++-
hw/xen/Makefile.objs | 2 +-
hw/xen/xen-host-pci-device.c | 5 ++
hw/xen/xen-host-pci-device.h | 1 +
hw/xen/xen_pt.c | 10 +++
hw/xen/xen_pt.h | 12 +++-
hw/xen/xen_pt_config_init.c | 50 +++++++++++++-
hw/xen/xen_pt_graphics.c | 513 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
qemu-options.hx | 9 +++
vl.c | 10 +++
10 files changed, 663 insertions(+), 5 deletion
Thanks
Tiejun
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