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| author | Joey Gouly <joey.gouly@arm.com> | 2021-02-02 13:36:57 +0100 |
|---|---|---|
| committer | Will Deacon <will@kernel.org> | 2021-02-03 21:43:45 +0100 |
| commit | 00ef543419366e8b742435992d08e0d5a87fd561 (patch) | |
| tree | e41fabcdd9176181f10a0732d290f081f62dcd6d /arch/arm64/include/asm/uaccess.h | |
| parent | arm64/ptdump:display the Linear Mapping start marker (diff) | |
| download | linux-00ef543419366e8b742435992d08e0d5a87fd561.tar.xz linux-00ef543419366e8b742435992d08e0d5a87fd561.zip | |
arm64: vmlinux.ld.S: add assertion for reserved_pg_dir offset
Add RESERVED_SWAPPER_OFFSET and use that instead of hardcoding
the offset between swapper_pg_dir and reserved_pg_dir.
Then use RESERVED_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/20210202123658.22308-2-joey.gouly@arm.com
Signed-off-by: Will Deacon <will@kernel.org>
Diffstat (limited to 'arch/arm64/include/asm/uaccess.h')
| -rw-r--r-- | arch/arm64/include/asm/uaccess.h | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/arch/arm64/include/asm/uaccess.h b/arch/arm64/include/asm/uaccess.h index f0fe0cc6abe0..0deb88467111 100644 --- a/arch/arm64/include/asm/uaccess.h +++ b/arch/arm64/include/asm/uaccess.h @@ -87,7 +87,7 @@ static inline void __uaccess_ttbr0_disable(void) ttbr = read_sysreg(ttbr1_el1); ttbr &= ~TTBR_ASID_MASK; /* reserved_pg_dir placed before swapper_pg_dir */ - write_sysreg(ttbr - PAGE_SIZE, ttbr0_el1); + write_sysreg(ttbr - RESERVED_SWAPPER_OFFSET, ttbr0_el1); isb(); /* Set reserved ASID */ write_sysreg(ttbr, ttbr1_el1); |