Re: [Xen-devel] [RFC for-4.5 06/12] xen/passthrough: rework dom0_pvh_reqs to use it also on ARM

["Jan Beulich" <JBeulich@xxxxxxxx>]

>>> On 07.02.14 at 18:43, Julien Grall <julien.grall@xxxxxxxxxx> wrote:
> DOM0 on ARM will have the same requirements as DOM0 PVH when iommu is 
> enabled.
> Both PVH and ARM guest has paging mode translate enabled, so Xen can use it
> to know if it needs to check the requirements.
> 
> Rename the function and remove "pvh" word in the commit message.

s/commit/panic/ ?

> 
> Signed-off-by: Julien Grall <julien.grall@xxxxxxxxxx>
> Cc: Xiantao Zhang <xiantao.zhang@xxxxxxxxx>

Other than the above,
Acked-by: Jan Beulich <jbeulich@xxxxxxxx>

> ---
>  xen/drivers/passthrough/iommu.c |   14 +++++++++-----
>  1 file changed, 9 insertions(+), 5 deletions(-)
> 
> diff --git a/xen/drivers/passthrough/iommu.c b/xen/drivers/passthrough/iommu.c
> index 19b0e23..26a5d91 100644
> --- a/xen/drivers/passthrough/iommu.c
> +++ b/xen/drivers/passthrough/iommu.c
> @@ -130,13 +130,18 @@ int iommu_domain_init(struct domain *d)
>      return hd->platform_ops->init(d);
>  }
>  
> -static __init void check_dom0_pvh_reqs(struct domain *d)
> +static __init void check_dom0_reqs(struct domain *d)
>  {
> +    if ( !paging_mode_translate(d) )
> +        return;
> +
>      if ( !iommu_enabled )
> -        panic("Presently, iommu must be enabled for pvh dom0\n");
> +        panic("Presently, iommu must be enabled to use dom0 with translate 
> "
> +              "paging mode\n");
>  
>      if ( iommu_passthrough )
> -        panic("For pvh dom0, dom0-passthrough must not be enabled\n");
> +        panic("Dom0 uses translate paging mode, dom0-passthrough must not be 
> "
> +              "enabled\n");
>  
>      iommu_dom0_strict = 1;
>  }
> @@ -145,8 +150,7 @@ void __init iommu_dom0_init(struct domain *d)
>  {
>      struct hvm_iommu *hd = domain_hvm_iommu(d);
>  
> -    if ( is_pvh_domain(d) )
> -        check_dom0_pvh_reqs(d);
> +    check_dom0_reqs(d);
>  
>      if ( !iommu_enabled )
>          return;
> -- 
> 1.7.10.4




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