Re: [PATCH RFC v3 14/21] x86: mm: carve out the generic compile-time folded pgtable case in effective_prot()
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From: "David Hildenbrand (Arm)" <david@kernel.org>
Date: 2026-09-10 11:06:28
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On 9/2/26 13:56, Yeoreum Yun wrote:
The behaviour of pXdp_get() will change with generic compile-time folded page tables. To prepare for that, rework effective_prot() to ignore any folded page tables entries, as it will unconditionally get called by ptdump core with pXd_val(pXdp_get()), and the value for folded entries really should be ignored. For this, introduce mm_first_pgtable_level() to identify the first real page-table level, move mm_pXd_folded() in !__ASSEMBLER__ and update effective_prot with higher_prot only when the current entry is not folded nor the first level. There should be no functional change. Signed-off-by: Yeoreum Yun <redacted>
Reviewed-by: David Hildenbrand (Arm) <david@kernel.org> -- Cheers, David