On Thu, Sep 01, 2022 at 08:32:35PM +0000, Kalra, Ashish wrote:
> As I mentioned earlier, this is computing an index into a 4K page
> within a hugepage mapping, therefore, though pte_index() works for 2M
> pages, but pmd_index() will not work for 1G pages.
Why not? What exactly do you need to get here?
So the way I understand it is, you want to map the faulting address to a
RMP entry. And that is either the 2M PMD entry when the page is a 1G one
and the 4K PTE entry when the page is a 2M one?
Why doesn't pmd_index() work?
Also, why isn't the lookup function's signature:
int snp_lookup_rmpentry(unsigned long address, int *level)
and all that logic to do the conversion to a PFN also not in it?
Thx.
--
Regards/Gruss,
Boris.
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