Re: [XEN v6 11/12] xen/arm: p2m: Use the pa_range_info table to support ARM_32 and ARM_64

[Julien Grall <julien@xxxxxxx>]

On 15/05/2023 11:30, Ayan Kumar Halder wrote:
> > AFAICT, this approach would be incorrect because we wouldn't take into 
> > account any restriction from the SMMU susbystem (it may support less 
> > than what the processor support).
> By the restriction from SMMU subsystem, I think you mean 
> p2m_restrict_ipa_bits().
Yes.

> As I can see, p2m_restrict_ipa_bits() gets invoked much later than 
> setup_virt_paging().
I am afraid this is not correct. If you look at setup.c, you will notice 
that iommu_setup() is called before setup_virt_paging(). There is a 
comment on top of the former call explaining the ordering.
Cheers,

--
Julien Grall