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| author | James Morse <james.morse@arm.com> | 2021-11-18 14:02:30 +0000 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2022-03-11 12:22:34 +0100 |
| commit | a40472d463f9ab6f971850989aa5a21f704b5cfd (patch) | |
| tree | 42428d790b13aae64035b09adc94561802f6e995 | |
| parent | be9c5526aad63ab0b13d72978206aec12ede9d76 (diff) | |
| download | linux-a40472d463f9ab6f971850989aa5a21f704b5cfd.tar.gz linux-a40472d463f9ab6f971850989aa5a21f704b5cfd.tar.bz2 linux-a40472d463f9ab6f971850989aa5a21f704b5cfd.zip | |
arm64: entry: Move trampoline macros out of ifdef'd section
commit 13d7a08352a83ef2252aeb464a5e08dfc06b5dfd 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>
| -rw-r--r-- | arch/arm64/kernel/entry.S | 11 |
1 files changed, 5 insertions, 6 deletions
diff --git a/arch/arm64/kernel/entry.S b/arch/arm64/kernel/entry.S index b2fb051fcf64..11e3fa092f59 100644 --- a/arch/arm64/kernel/entry.S +++ b/arch/arm64/kernel/entry.S @@ -608,12 +608,6 @@ SYM_CODE_END(ret_to_user) .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 @@ -709,6 +703,11 @@ alternative_else_nop_endif .endr .endm +#ifdef CONFIG_UNMAP_KERNEL_AT_EL0 +/* + * Exception vectors trampoline. + */ + .pushsection ".entry.tramp.text", "ax" .align 11 SYM_CODE_START_NOALIGN(tramp_vectors) generate_tramp_vector |