arm64: mm: Move ASID from TTBR0 to TTBR1

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In preparation for mapping kernelspace and userspace with different
ASIDs, move the ASID to TTBR1 and update switch_mm to context-switch
TTBR0 via an invalid mapping (the zero page).

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>

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This commit is contained in:

Will Deacon 2017-08-10 13:19:09 +01:00

parent 376133b7ed

commit 7655abb953

4 changed files with 14 additions and 9 deletions

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7

arch/arm64/include/asm/mmu_context.h

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1

arch/arm64/include/asm/pgtable-hwdef.h

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6

arch/arm64/include/asm/proc-fns.h

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9

arch/arm64/mm/proc.S

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