Re: [Xen-devel] [PATCH v6 20/29] xen/x86: allow disabling the emulated IOMMU

[Aravind Gopalakrishnan <aravind.gopalakrishnan@xxxxxxx>]

On 9/4/2015 7:08 AM, Roger Pau Monne wrote:
> Signed-off-by: Roger Pau Monnà <roger.pau@xxxxxxxxxx>
> Acked-by: Andrew Cooper <andrew.cooper3@xxxxxxxxxx>
> Cc: Suravee Suthikulpanit <suravee.suthikulpanit@xxxxxxx>
> Cc: Aravind Gopalakrishnan <Aravind.Gopalakrishnan@xxxxxxx>
> ---
> Changes since v4:
>   - Add Andrew Cooper Acked-by.
> ---
>   xen/drivers/passthrough/amd/iommu_guest.c | 3 ++-
>   1 file changed, 2 insertions(+), 1 deletion(-)
>
> diff --git a/xen/drivers/passthrough/amd/iommu_guest.c 
> b/xen/drivers/passthrough/amd/iommu_guest.c
> index e74f469..b4e75ac 100644
> --- a/xen/drivers/passthrough/amd/iommu_guest.c
> +++ b/xen/drivers/passthrough/amd/iommu_guest.c
> @@ -887,7 +887,8 @@ int guest_iommu_init(struct domain* d)
>       struct guest_iommu *iommu;
>       struct hvm_iommu *hd  = domain_hvm_iommu(d);
>   
> -    if ( !is_hvm_domain(d) || !iommu_enabled || !iommuv2_enabled )
> +    if ( !is_hvm_domain(d) || !iommu_enabled || !iommuv2_enabled ||
> +         !has_viommu(d) )
>           return 0;
>   
>       iommu = xzalloc(struct guest_iommu);

Acked-by: Aravind Gopalakrishnan <Aravind.Gopalakrishnan@xxxxxxx>

Thanks,
-Aravind.

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