Re: [Qemu-devel] [PATCH v4 3/4] hw/iommu: enable iommu with -device

[Paolo Bonzini <pbonzini@redhat.com>]

On 14/06/2016 09:19, Marcel Apfelbaum wrote:
> Use the standard '-device iommu' to create the IOMMU device.

It's "-device intel-iommu", apart from this it looks good, thanks!

Paolo

> The legacy '-machine,iommu=on' can still be used.
> 
> Signed-off-by: Marcel Apfelbaum <marcel@redhat.com>
> ---
>  hw/i386/intel_iommu.c | 16 ++++++++++++++++
>  hw/i386/pc_q35.c      |  1 -
>  hw/pci-host/q35.c     | 17 +----------------
>  3 files changed, 17 insertions(+), 17 deletions(-)
> 
> diff --git a/hw/i386/intel_iommu.c b/hw/i386/intel_iommu.c
> index 347718f..ea25585 100644
> --- a/hw/i386/intel_iommu.c
> +++ b/hw/i386/intel_iommu.c
> @@ -24,6 +24,7 @@
>  #include "exec/address-spaces.h"
>  #include "intel_iommu_internal.h"
>  #include "hw/pci/pci.h"
> +#include "hw/i386/pc.h"
>  
>  /*#define DEBUG_INTEL_IOMMU*/
>  #ifdef DEBUG_INTEL_IOMMU
> @@ -2014,8 +2015,20 @@ static void vtd_reset(DeviceState *dev)
>      vtd_init(s);
>  }
>  
> +static AddressSpace *vtd_host_dma_iommu(PCIBus *bus, void *opaque, int devfn)
> +{
> +    IntelIOMMUState *s = opaque;
> +    VTDAddressSpace *vtd_as;
> +
> +    assert(0 <= devfn && devfn <= VTD_PCI_DEVFN_MAX);
> +
> +    vtd_as = vtd_find_add_as(s, bus, devfn);
> +    return &vtd_as->as;
> +}
> +
>  static void vtd_realize(DeviceState *dev, Error **errp)
>  {
> +    PCIBus *bus = PC_MACHINE(qdev_get_machine())->bus;
>      IntelIOMMUState *s = INTEL_IOMMU_DEVICE(dev);
>  
>      VTD_DPRINTF(GENERAL, "");
> @@ -2029,6 +2042,8 @@ static void vtd_realize(DeviceState *dev, Error **errp)
>      s->vtd_as_by_busptr = g_hash_table_new_full(vtd_uint64_hash, vtd_uint64_equal,
>                                                g_free, g_free);
>      vtd_init(s);
> +    sysbus_mmio_map(SYS_BUS_DEVICE(s), 0, Q35_HOST_BRIDGE_IOMMU_ADDR);
> +    pci_setup_iommu(bus, vtd_host_dma_iommu, dev);
>  }
>  
>  static void vtd_class_init(ObjectClass *klass, void *data)
> @@ -2039,6 +2054,7 @@ static void vtd_class_init(ObjectClass *klass, void *data)
>      dc->realize = vtd_realize;
>      dc->vmsd = &vtd_vmstate;
>      dc->props = vtd_properties;
> +    dc->hotpluggable = false;
>  }
>  
>  static const TypeInfo vtd_info = {
> diff --git a/hw/i386/pc_q35.c b/hw/i386/pc_q35.c
> index 431eaed..47e93d4 100644
> --- a/hw/i386/pc_q35.c
> +++ b/hw/i386/pc_q35.c
> @@ -169,7 +169,6 @@ static void pc_q35_init(MachineState *machine)
>      qdev_init_nofail(DEVICE(q35_host));
>      phb = PCI_HOST_BRIDGE(q35_host);
>      host_bus = phb->bus;
> -    pcms->bus = phb->bus;
>      /* create ISA bus */
>      lpc = pci_create_simple_multifunction(host_bus, PCI_DEVFN(ICH9_LPC_DEV,
>                                            ICH9_LPC_FUNC), true,
> diff --git a/hw/pci-host/q35.c b/hw/pci-host/q35.c
> index 141ba5b..4bd5fb5 100644
> --- a/hw/pci-host/q35.c
> +++ b/hw/pci-host/q35.c
> @@ -52,6 +52,7 @@ static void q35_host_realize(DeviceState *dev, Error **errp)
>      pci->bus = pci_bus_new(DEVICE(s), "pcie.0",
>                             s->mch.pci_address_space, s->mch.address_space_io,
>                             0, TYPE_PCIE_BUS);
> +    PC_MACHINE(qdev_get_machine())->bus = pci->bus;
>      qdev_set_parent_bus(DEVICE(&s->mch), BUS(pci->bus));
>      qdev_init_nofail(DEVICE(&s->mch));
>  }
> @@ -426,28 +427,12 @@ static void mch_reset(DeviceState *qdev)
>      mch_update(mch);
>  }
>  
> -static AddressSpace *q35_host_dma_iommu(PCIBus *bus, void *opaque, int devfn)
> -{
> -    IntelIOMMUState *s = opaque;
> -    VTDAddressSpace *vtd_as;
> -
> -    assert(0 <= devfn && devfn <= VTD_PCI_DEVFN_MAX);
> -
> -    vtd_as = vtd_find_add_as(s, bus, devfn);
> -    return &vtd_as->as;
> -}
> -
>  static void mch_init_dmar(MCHPCIState *mch)
>  {
> -    PCIBus *pci_bus = PCI_BUS(qdev_get_parent_bus(DEVICE(mch)));
> -
>      mch->iommu = INTEL_IOMMU_DEVICE(qdev_create(NULL, TYPE_INTEL_IOMMU_DEVICE));
>      object_property_add_child(OBJECT(mch), "intel-iommu",
>                                OBJECT(mch->iommu), NULL);
>      qdev_init_nofail(DEVICE(mch->iommu));
> -    sysbus_mmio_map(SYS_BUS_DEVICE(mch->iommu), 0, Q35_HOST_BRIDGE_IOMMU_ADDR);
> -
> -    pci_setup_iommu(pci_bus, q35_host_dma_iommu, mch->iommu);
>  }
>  
>  static void mch_realize(PCIDevice *d, Error **errp)
>