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| 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/include/asm | |
| parent | 00ef543419366e8b742435992d08e0d5a87fd561 (diff) | |
| download | lwn-0188a894c390e51475274ece76b4d601782d709e.tar.gz lwn-0188a894c390e51475274ece76b4d601782d709e.zip | |
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/include/asm')
| -rw-r--r-- | arch/arm64/include/asm/memory.h | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/arch/arm64/include/asm/memory.h b/arch/arm64/include/asm/memory.h index f6bf8a972a16..6c2674937665 100644 --- a/arch/arm64/include/asm/memory.h +++ b/arch/arm64/include/asm/memory.h @@ -165,6 +165,12 @@ */ #define RESERVED_SWAPPER_OFFSET (PAGE_SIZE) +/* + * Open-coded (swapper_pg_dir - tramp_pg_dir) as this cannot be calculated + * until link time. + */ +#define TRAMP_SWAPPER_OFFSET (2 * PAGE_SIZE) + #ifndef __ASSEMBLY__ #include <linux/bitops.h> |