Re: [PATCH] x86/vtd: relax EPT page table sharing check

[Jan Beulich <jbeulich@xxxxxxxx>]

On 17.04.2020 13:29, Roger Pau Monne wrote:
> The EPT page tables can be shared with the IOMMU as long as the page
> sizes supported by EPT are also supported by the IOMMU.
> 
> Current code checks that both the IOMMU and EPT support the same page
> sizes, but this is not strictly required, the IOMMU supporting more
> page sizes than EPT is fine and shouldn't block page table sharing.
> 
> This is likely not a common case (IOMMU supporting more page sizes
> than EPT), but should still be fixed for correctness.
> 
> Signed-off-by: Roger Pau Monné <roger.pau@xxxxxxxxxx>

Reviewed-by: Jan Beulich <jbeulich@xxxxxxxx>