Re: [Qemu-devel] [V6 2/4] hw/core: Add AMD IOMMU to machine properties

[Jan Kiszka]

On 2016-02-21 19:10, David Kiarie wrote:
> diff --git a/qemu-options.hx b/qemu-options.hx
> index 2f0465e..dad160f 100644
> --- a/qemu-options.hx
> +++ b/qemu-options.hx
> @@ -38,7 +38,7 @@ DEF("machine", HAS_ARG, QEMU_OPTION_machine, \
>      "                kvm_shadow_mem=size of KVM shadow MMU\n"
>      "                dump-guest-core=on|off include guest memory in a core 
> dump (default=on)\n"
>      "                mem-merge=on|off controls memory merge support 
> (default: on)\n"
> -    "                iommu=on|off controls emulated Intel IOMMU (VT-d) 
> support (default=off)\n"
> +    "                iommu=amd|intel enables and selects the emulated IOMMU 
> (default: off)\n"

We should also support "iommu=off" or "none" to explicitly disable it.
That is consistent with other switches, and maybe there will once be a
machine type (chipset) with IOMMU enabled by default.

Jan

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