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Re: [Qemu-devel] [v4][PATCH 4/5] xen:hw:pci-host:piix: create host bridg
From: |
Michael S. Tsirkin |
Subject: |
Re: [Qemu-devel] [v4][PATCH 4/5] xen:hw:pci-host:piix: create host bridge to passthrough |
Date: |
Wed, 6 Aug 2014 11:42:11 +0200 |
On Wed, Aug 06, 2014 at 02:50:34PM +0800, Tiejun Chen wrote:
> Implement a pci host bridge specific to passthrough. Actually
> this just inherits the standard one.
>
> This is based on http://patchwork.ozlabs.org/patch/363810/.
>
> Signed-off-by: Tiejun Chen <address@hidden>
> ---
> hw/pci-host/piix.c | 39 +++++++++++++++++++++++++++++++++++++++
> include/hw/i386/pc.h | 2 ++
> 2 files changed, 41 insertions(+)
>
> v4:
>
> * Rebase
>
> v3:
>
> * Rebase
>
> v2:
>
> * Just add prefix with XEN_IGD_PASSTHROUGH/xen_igd_passthrough
>
> diff --git a/hw/pci-host/piix.c b/hw/pci-host/piix.c
> index 4330599..5cac398 100644
> --- a/hw/pci-host/piix.c
> +++ b/hw/pci-host/piix.c
> @@ -303,6 +303,17 @@ static int i440fx_initfn(PCIDevice *dev)
> return 0;
> }
>
> +static int xen_igd_passthrough_i440fx_initfn(PCIDevice *dev)
> +{
> + PCII440FXState *d = I440FX_PCI_DEVICE(dev,
> + TYPE_XEN_IGD_PASSTHROUGH_I440FX_PCI_DEVICE);
> +
> + dev->config[I440FX_SMRAM] = 0x02;
> +
> + cpu_smm_register(&i440fx_set_smm, d);
> + return 0;
> +}
> +
> PCIBus *i440fx_init(const char *host_type, const char *pci_type,
> PCII440FXState **pi440fx_state,
> int *piix3_devfn,
don't duplicate code.
Reuse the function from regular piix.
> @@ -703,6 +714,33 @@ static const TypeInfo i440fx_info = {
> .class_init = i440fx_class_init,
> };
>
> +static void xen_igd_passthrough_i440fx_class_init(ObjectClass *klass, void
> *data)
> +{
> + DeviceClass *dc = DEVICE_CLASS(klass);
> + PCIDeviceClass *k = PCI_DEVICE_CLASS(klass);
> +
> + k->init = xen_igd_passthrough_i440fx_initfn;
> + k->vendor_id = PCI_VENDOR_ID_INTEL;
> + k->device_id = PCI_DEVICE_ID_INTEL_82441;
> + k->revision = 0x02;
> + k->class_id = PCI_CLASS_BRIDGE_HOST;
> + dc->desc = "IGD PT XEN Host bridge";
> + dc->vmsd = &vmstate_i440fx;
> + /*
> + * PCI-facing part of the host bridge, not usable without the
> + * host-facing part, which can't be device_add'ed, yet.
> + */
> + dc->cannot_instantiate_with_device_add_yet = true;
> + dc->hotpluggable = false;
> +}
> +
> +static const TypeInfo xen_igd_passthrough_i440fx_info = {
> + .name = TYPE_XEN_IGD_PASSTHROUGH_I440FX_PCI_DEVICE,
> + .parent = TYPE_PCI_DEVICE,
> + .instance_size = sizeof(PCII440FXState),
> + .class_init = xen_igd_passthrough_i440fx_class_init,
> +};
> +
> static const char *i440fx_pcihost_root_bus_path(PCIHostState *host_bridge,
> PCIBus *rootbus)
> {
> @@ -744,6 +782,7 @@ static const TypeInfo i440fx_pcihost_info = {
> static void i440fx_register_types(void)
> {
> type_register_static(&i440fx_info);
> + type_register_static(&xen_igd_passthrough_i440fx_info);
> type_register_static(&piix3_info);
> type_register_static(&piix3_xen_info);
> type_register_static(&i440fx_pcihost_info);
> diff --git a/include/hw/i386/pc.h b/include/hw/i386/pc.h
> index 11fb72f..de34aa6 100644
> --- a/include/hw/i386/pc.h
> +++ b/include/hw/i386/pc.h
> @@ -238,6 +238,8 @@ typedef struct PCII440FXState PCII440FXState;
> #define TYPE_I440FX_PCI_HOST_BRIDGE "i440FX-pcihost"
> #define TYPE_I440FX_PCI_DEVICE "i440FX"
>
> +#define TYPE_XEN_IGD_PASSTHROUGH_I440FX_PCI_DEVICE
> "xen-igd-passthrough-i440FX"
> +
> PCIBus *i440fx_init(const char *host_type, const char *pci_type,
> PCII440FXState **pi440fx_state, int *piix_devfn,
> ISABus **isa_bus, qemu_irq *pic,
> --
> 1.9.1
[Qemu-devel] [v4][PATCH 4/5] xen:hw:pci-host:piix: create host bridge to passthrough, Tiejun Chen, 2014/08/06
- Re: [Qemu-devel] [v4][PATCH 4/5] xen:hw:pci-host:piix: create host bridge to passthrough,
Michael S. Tsirkin <=
[Qemu-devel] [v4][PATCH 5/5] xen:hw:i386:pc_piix: introduce new machine for IGD passthrough, Tiejun Chen, 2014/08/06