On Mon, Aug 19, 2024 at 02:19:18PM +0100, Steven Price wrote:

Make the PHYS_MASK_SHIFT dynamic for Realms. This is only is required
for masking the PFN from a pte entry.

Unless my grep failed, pte_pfn() hasn't used PHYS_MASK for many years,
since commit 75387b92635e ("arm64: handle 52-bit physical addresses in
page table entries").

Can you check what pte_pfn() returns on a shared page?

Unless we need this macro for other things, I'm more tempted to clear
the bit in __pte_to_phys().

-- 
Catalin