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arm64: kernel: move identity map out of .text mapping

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Reorganize the ID map slightly so that only code that is executed with
the MMU off or via the 1:1 mapping remains. This allows us to move the
identity map out of the .text segment, as it will no longer need
executable permissions via the kernel mapping.

Signed-off-by: Ard Biesheuvel <ardb@kernel.org>
Link: https://lore.kernel.org/r/20230111102236.1430401-3-ardb@kernel.org
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
This commit is contained in:
Ard Biesheuvel
2023-01-11 11:22:32 +01:00
committed by Catalin Marinas
parent 82e4958800
commit af7249b317
3 changed files with 16 additions and 16 deletions
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2
arch/arm64/kernel/vmlinux.lds.S
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@@ -179,7 +179,6 @@ SECTIONS
LOCK_TEXT
KPROBES_TEXT
HYPERVISOR_TEXT
IDMAP_TEXT
*(.gnu.warning)
. = ALIGN(16);
*(.got) /* Global offset table */
@@ -206,6 +205,7 @@ SECTIONS
TRAMP_TEXT
HIBERNATE_TEXT
KEXEC_TEXT
IDMAP_TEXT
. = ALIGN(PAGE_SIZE);
}