arm64: mm: Invalidate both kernel and user ASIDs when performing TLBI

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Commit 9b0de864b5 upstream.

Since an mm has both a kernel and a user ASID, we need to ensure that
broadcast TLB maintenance targets both address spaces so that things
like CoW continue to work with the uaccess primitives in the kernel.

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>
Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

...

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Will Deacon 2017-08-10 14:13:33 +01:00 • committed by Greg Kroah-Hartman

parent 53b1395088

commit d6c414013b

1 changed files with 14 additions and 2 deletions

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arch/arm64/include/asm/tlbflush.h

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