Re: [Xen-devel] [PATCH V13 3/7] xen/arm: Allow hypervisor access to mem_access protected pages

[Julien Grall <julien.grall@xxxxxxxxxx>]

On 12/03/15 13:38, Tamas K Lengyel wrote:
>     > +    if ( flag == GV2M_WRITE )
>     > +    {
>     > +        switch ( t )
>     > +        {
>     > +        case p2m_ram_rw:
> 
>     > +        case p2m_iommu_map_rw:
>     > +        case p2m_map_foreign:
>     > +        case p2m_grant_map_rw:
>     > +        case p2m_mmio_direct:
> 
>     We disallow guest copy from the above 4 types via get_page_from_gva. So
>     I'm not sure if it's worth to check them here.
> 
> 
> You mean get_page_from_gva only works for p2m_ram_rw type? Is this the
> case for GV2M_READ as well?

Yes, currently p2m_ram_rw is the only type bound to a struct page.

-- 
Julien Grall

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