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arm64: entry: Move trampoline macros out of ifdef'd section

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commit 13d7a08352 upstream.

The macros for building the kpti trampoline are all behind
CONFIG_UNMAP_KERNEL_AT_EL0, and in a region that outputs to the
.entry.tramp.text section.

Move the macros out so they can be used to generate other kinds of
trampoline. Only the symbols need to be guarded by
CONFIG_UNMAP_KERNEL_AT_EL0 and appear in the .entry.tramp.text section.

Reviewed-by: Russell King (Oracle) <rmk+kernel@armlinux.org.uk>
Reviewed-by: Catalin Marinas <catalin.marinas@arm.com>
Signed-off-by: James Morse <james.morse@arm.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
James Morse
2022-04-06 17:45:34 +01:00
committed by Chris
parent 52fed0d0c1
commit 5a4032c52b
1 changed files with 6 additions and 6 deletions
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12
arch/arm64/kernel/entry.S
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@@ -1067,12 +1067,7 @@ __ni_sys_trace:
.popsection // .entry.text
#ifdef CONFIG_UNMAP_KERNEL_AT_EL0
/*
* Exception vectors trampoline.
*/
.pushsection ".entry.tramp.text", "ax"
// Move from tramp_pg_dir to swapper_pg_dir
.macro tramp_map_kernel, tmp
mrs \tmp, ttbr1_el1
sub \tmp, \tmp, #(SWAPPER_DIR_SIZE + RESERVED_TTBR0_SIZE)
@@ -1161,6 +1156,11 @@ __ni_sys_trace:
.endr
.endm
#ifdef CONFIG_UNMAP_KERNEL_AT_EL0
/*
* Exception vectors trampoline.
*/
.pushsection ".entry.tramp.text", "ax"
.align 11
ENTRY(tramp_vectors)
generate_tramp_vector