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arm64: mm: Only map KPTI trampoline if it is going to be used 

Avoid creating the fixmap entries for the KPTI trampoline if KPTI is not
in use.

Signed-off-by: Ard Biesheuvel <ardb@kernel.org>
Acked-by: Mark Rutland <mark.rutland@arm.com>
Link: https://lore.kernel.org/r/20231127120049.2258650-7-ardb@google.com
Signed-off-by: Will Deacon <will@kernel.org>
This commit is contained in:
Ard Biesheuvel 2023-11-27 13:00:52 +01:00 committed by Will Deacon
parent 103423ad7e
commit 8885c7398f
1 changed files with 3 additions and 0 deletions
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3
arch/arm64/mm/mmu.c
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@ -674,6 +674,9 @@ static int __init map_entry_trampoline(void)
{
int i;
if (!arm64_kernel_unmapped_at_el0())
return 0;
pgprot_t prot = kernel_exec_prot();
phys_addr_t pa_start = __pa_symbol(__entry_tramp_text_start);