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Re: [Qemu-devel] [v8][RESEND][PATCH 00/10] xen: add Intel IGD passthroug
From: |
Michael S. Tsirkin |
Subject: |
Re: [Qemu-devel] [v8][RESEND][PATCH 00/10] xen: add Intel IGD passthrough |
Date: |
Thu, 2 Jul 2015 08:22:12 +0200 |
On Fri, Jun 05, 2015 at 04:44:51PM +0800, Tiejun Chen wrote:
> v8:
>
> * Rebase on the latest qemu tree
> * Cleanup one xen leftover in patch #3
For the PC bits:
Acked-by: Michael S. Tsirkin <address@hidden>
> v7:
>
> * Instead of "-gfx_passthru" we'd like to make that a machine
> option, "-machine xxx,igd-passthru=on""
> * try to make something as common shared by others like KvmGT in
> the future
> * Just read those real value from host bridge pci
> configuration space when create host bridge then put in dev->config.
>
> v6:
>
> * Drop introducing a new machine specific to IGD passthrough
> * Try to share some codes from KVM stuff in qemu to retrive VGA BIOS
> * Currently IGD drivers always need to access PCH by 1f.0. But we
> don't want to poke that directly to get ID, and although in real
> world different GPU should have different PCH. But actually the
> different PCH DIDs likely map to different PCH SKUs. We do the
> same thing for the GPU. For PCH, the different SKUs are going to
> be all the same silicon design and implementation, just different
> features turn on and off with fuses. The SW interfaces should be
> consistent across all SKUs in a given family (eg LPT). But just
> same features may not be supported.
>
> Most of these different PCH features probably don't matter to the
> Gfx driver, but obviously any difference in display port connections
> will so it should be fine with any PCH in case of passthrough.
>
> So currently use one PCH version, 0x8c4e, to cover all HSW(Haswell)
> scenarios, 0x9cc3 for BDW(Broadwell).
> * Drop igd write ops since its fine to emulate that, and we also shrink
> those igd read ops as necessary.
> * Rebase and cleanup all patches.
>
> v5:
>
> * Simplify to make sure its really inherited from the standard one in patch #3
> * Then drop the original patch #3
>
> v4:
>
> * Rebase on latest tree
> * Drop patch #2
> * Regenerate patches after Michael introduce patch #1
> * We need to use this pci_type as a index to reuse I440FX_PCI_DEVICE()
> * Test: boot with a preinstalled winxp
> ./i386-softmmu/qemu-system-i386 -hda winxp-32.img -m 2560 -boot c -machine
> pc
>
> v3:
>
> * Drop patch #4
> * Add one patch #1 from Michael
> * Rebase
> * In./i386-softmmu/qemu-system-i386 -hda test.img -m 2560 -boot c -machine pc
>
> v2:
>
> * Fix some coding style
> * New patch to separate i440fx_init
> * Just add prefix with XEN_IGD_PASSTHROUGH/xen_igd_passthrough
> * Based on patch #2 to regenerate
> * Unify prefix with XEN_IGD_PASSTHROUGH/xen_igd_passthrough like patch #3
> * Test: boot with a preinstalled ubuntu 14.04
> ./i386-softmmu/qemu-system-i386 -hda test.img -m 2560 -boot c -machine pc
>
> As we discussed we need to create a separate machine to support current
> IGD passthrough.
>
> ----------------------------------------------------------------
> Michael S. Tsirkin (1):
> i440fx: make types configurable at run-time
>
> Tiejun Chen (9):
> pc_init1: pass parameters just with types
> piix: create host bridge to passthrough
> hw/pci-assign: split pci-assign.c
> xen, gfx passthrough: basic graphics passthrough support
> xen, gfx passthrough: retrieve VGA BIOS to work
> igd gfx passthrough: create a isa bridge
> xen, gfx passthrough: register a isa bridge
> xen, gfx passthrough: register host bridge specific to passthrough
> xen, gfx passthrough: add opregion mapping
>
> hw/core/machine.c | 20 +++
> hw/i386/Makefile.objs | 1 +
> hw/i386/kvm/pci-assign.c | 82 +---------
> hw/i386/pc_piix.c | 151 ++++++++++++++++++-
> hw/i386/pci-assign-load-rom.c | 93 ++++++++++++
> hw/pci-host/piix.c | 91 +++++++++++-
> hw/xen/Makefile.objs | 1 +
> hw/xen/xen-host-pci-device.c | 5 +
> hw/xen/xen-host-pci-device.h | 1 +
> hw/xen/xen_pt.c | 32 ++++
> hw/xen/xen_pt.h | 21 ++-
> hw/xen/xen_pt_config_init.c | 51 ++++++-
> hw/xen/xen_pt_graphics.c | 272 ++++++++++++++++++++++++++++++++++
> include/hw/boards.h | 1 +
> include/hw/i386/pc.h | 8 +-
> include/hw/pci/pci-assign.h | 27 ++++
> include/hw/xen/xen.h | 1 +
> qemu-options.hx | 3 +
> vl.c | 10 ++
> 19 files changed, 780 insertions(+), 91 deletions(-)
> create mode 100644 hw/i386/pci-assign-load-rom.c
> create mode 100644 hw/xen/xen_pt_graphics.c
> create mode 100644 include/hw/pci/pci-assign.h
>
> Thanks
> Tiejun
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