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| author | Kristina Martsenko <kristina.martsenko@arm.com> | 2018-01-15 18:23:48 +0300 |
|---|---|---|
| committer | Catalin Marinas <catalin.marinas@arm.com> | 2018-01-15 21:20:04 +0300 |
| commit | 6a205420758af5625429a2e77a2654abbf59ac09 (patch) | |
| tree | 56c23e65c42f5fdcf7d548bb85f5099a127aaf8b /arch/arm64/include/asm | |
| parent | 071929dbdd865f779a89ba3f1e06ba8d17dd3743 (diff) | |
| download | linux-6a205420758af5625429a2e77a2654abbf59ac09.tar.xz | |
arm64: fix ID map extension to 52 bits
Commit fa2a8445b1d3 added support for extending the ID map to 52 bits,
but accidentally dropped a required change to __cpu_uses_extended_idmap.
As a result, the kernel fails to boot when VA_BITS = 48 and the ID map
text is in 52-bit physical memory, because we reduce TCR.T0SZ to cover
the ID map, but then never set it back to VA_BITS.
Add back the change, and also clean up some double parentheses.
Fixes: fa2a8445b1d3 ("arm64: allow ID map to be extended to 52 bits")
Reviewed-by: Suzuki K Poulose <suzuki.poulose@arm.com>
Signed-off-by: Kristina Martsenko <kristina.martsenko@arm.com>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
Diffstat (limited to 'arch/arm64/include/asm')
| -rw-r--r-- | arch/arm64/include/asm/mmu_context.h | 5 |
1 files changed, 2 insertions, 3 deletions
diff --git a/arch/arm64/include/asm/mmu_context.h b/arch/arm64/include/asm/mmu_context.h index 8f80fcb49252..5aee19905556 100644 --- a/arch/arm64/include/asm/mmu_context.h +++ b/arch/arm64/include/asm/mmu_context.h @@ -72,8 +72,7 @@ extern u64 idmap_ptrs_per_pgd; static inline bool __cpu_uses_extended_idmap(void) { - return (!IS_ENABLED(CONFIG_ARM64_VA_BITS_48) && - unlikely(idmap_t0sz != TCR_T0SZ(VA_BITS))); + return unlikely(idmap_t0sz != TCR_T0SZ(VA_BITS)); } /* @@ -82,7 +81,7 @@ static inline bool __cpu_uses_extended_idmap(void) */ static inline bool __cpu_uses_extended_idmap_level(void) { - return ARM64_HW_PGTABLE_LEVELS((64 - idmap_t0sz)) > CONFIG_PGTABLE_LEVELS; + return ARM64_HW_PGTABLE_LEVELS(64 - idmap_t0sz) > CONFIG_PGTABLE_LEVELS; } /* |