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| author | Will Deacon <will.deacon@arm.com> | 2017-12-01 18:33:48 +0100 |
|---|---|---|
| committer | Will Deacon <will.deacon@arm.com> | 2017-12-11 14:41:17 +0100 |
| commit | b519538dfefc2f8478a1bcb458459c861d431784 (patch) | |
| tree | 67c2118ec03d3ba0464620ecc5f5f6117b87e6f8 /arch/arm64/include/asm/asm-uaccess.h | |
| parent | perf: arm_spe: Fail device probe when arm64_kernel_unmapped_at_el0() (diff) | |
| download | linux-b519538dfefc2f8478a1bcb458459c861d431784.tar.xz linux-b519538dfefc2f8478a1bcb458459c861d431784.zip | |
arm64: mm: Introduce TTBR_ASID_MASK for getting at the ASID in the TTBR
There are now a handful of open-coded masks to extract the ASID from a
TTBR value, so introduce a TTBR_ASID_MASK and use that instead.
Suggested-by: Mark Rutland <mark.rutland@arm.com>
Reviewed-by: Mark Rutland <mark.rutland@arm.com>
Tested-by: Laura Abbott <labbott@redhat.com>
Tested-by: Shanker Donthineni <shankerd@codeaurora.org>
Signed-off-by: Will Deacon <will.deacon@arm.com>
Diffstat (limited to 'arch/arm64/include/asm/asm-uaccess.h')
| -rw-r--r-- | arch/arm64/include/asm/asm-uaccess.h | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/arch/arm64/include/asm/asm-uaccess.h b/arch/arm64/include/asm/asm-uaccess.h index 21b8cf304028..f4f234b6155e 100644 --- a/arch/arm64/include/asm/asm-uaccess.h +++ b/arch/arm64/include/asm/asm-uaccess.h @@ -4,6 +4,7 @@ #include <asm/alternative.h> #include <asm/kernel-pgtable.h> +#include <asm/mmu.h> #include <asm/sysreg.h> #include <asm/assembler.h> @@ -17,7 +18,7 @@ msr ttbr0_el1, \tmp1 // set reserved TTBR0_EL1 isb sub \tmp1, \tmp1, #SWAPPER_DIR_SIZE - bic \tmp1, \tmp1, #(0xffff << 48) + bic \tmp1, \tmp1, #TTBR_ASID_MASK msr ttbr1_el1, \tmp1 // set reserved ASID isb .endm |