arm64: Fix 5-level paging support in kexec/hibernate trampoline

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Add the missing code to allocate P4D level page tables when cloning the
the kernel page tables. This fixes a crash that may be observed when
attempting to resume from hibernation on an LPA2 capable system with 4k
pages, which therefore uses 5 levels of paging.

Presumably, kexec is equally affected.

Signed-off-by: Ard Biesheuvel <ardb@kernel.org>
Link: https://lore.kernel.org/r/20250110175145.785702-2-ardb+git@google.com
Signed-off-by: Will Deacon <will@kernel.org>

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Ard Biesheuvel 2025-01-10 18:51:46 +01:00 • committed by Will Deacon

parent 2014c95afe

commit 3648027de1

1 changed files with 7 additions and 0 deletions

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arch/arm64/mm/trans_pgd.c

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