diff options
| author | Joey Gouly <joey.gouly@arm.com> | 2021-02-02 12:36:58 +0000 |
|---|---|---|
| committer | Will Deacon <will@kernel.org> | 2021-02-03 20:43:45 +0000 |
| commit | 0188a894c390e51475274ece76b4d601782d709e (patch) | |
| tree | 79cf592206f63eed00a6b74f88f573ce836cd627 /arch/arm64/kernel/entry.S | |
| parent | 00ef543419366e8b742435992d08e0d5a87fd561 (diff) | |
arm64: vmlinux.ld.S: add assertion for tramp_pg_dir offset
Add TRAMP_SWAPPER_OFFSET and use that instead of hardcoding
the offset between swapper_pg_dir and tramp_pg_dir.
Then use TRAMP_SWAPPER_OFFSET to assert that the offset is
correct at link time.
Signed-off-by: Joey Gouly <joey.gouly@arm.com>
Reviewed-by: Mark Rutland <mark.rutland@arm.com>
Tested-by: Mark Rutland <mark.rutland@arm.com>
Link: https://lore.kernel.org/r/20210202123658.22308-3-joey.gouly@arm.com
Signed-off-by: Will Deacon <will@kernel.org>
Diffstat (limited to 'arch/arm64/kernel/entry.S')
| -rw-r--r-- | arch/arm64/kernel/entry.S | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/arch/arm64/kernel/entry.S b/arch/arm64/kernel/entry.S index c9bae73f2621..c6aee646eb6b 100644 --- a/arch/arm64/kernel/entry.S +++ b/arch/arm64/kernel/entry.S @@ -805,7 +805,7 @@ SYM_CODE_END(ret_to_user) // Move from tramp_pg_dir to swapper_pg_dir .macro tramp_map_kernel, tmp mrs \tmp, ttbr1_el1 - add \tmp, \tmp, #(2 * PAGE_SIZE) + add \tmp, \tmp, #TRAMP_SWAPPER_OFFSET bic \tmp, \tmp, #USER_ASID_FLAG msr ttbr1_el1, \tmp #ifdef CONFIG_QCOM_FALKOR_ERRATUM_1003 @@ -825,7 +825,7 @@ alternative_else_nop_endif // Move from swapper_pg_dir to tramp_pg_dir .macro tramp_unmap_kernel, tmp mrs \tmp, ttbr1_el1 - sub \tmp, \tmp, #(2 * PAGE_SIZE) + sub \tmp, \tmp, #TRAMP_SWAPPER_OFFSET orr \tmp, \tmp, #USER_ASID_FLAG msr ttbr1_el1, \tmp /* |