diff options
| author | Will Deacon <will.deacon@arm.com> | 2017-11-14 13:58:08 +0000 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@google.com> | 2018-01-06 11:09:28 +0100 |
| commit | 9497136713f61e65b91329750cc1c013616ccf7f (patch) | |
| tree | 347e27f377ac3329ba72a13522201ea2afe7a4e7 /include/linux/debugobjects.h | |
| parent | 290ef683657ca5738372cc669e80d6a89f000fb2 (diff) | |
FROMLIST: arm64: mm: Add arm64_kernel_unmapped_at_el0 helper
In order for code such as TLB invalidation to operate efficiently when
the decision to map the kernel at EL0 is determined at runtime, this
patch introduces a helper function, arm64_kernel_unmapped_at_el0, to
determine whether or not the kernel is mapped whilst running in userspace.
Currently, this just reports the value of CONFIG_UNMAP_KERNEL_AT_EL0,
but will later be hooked up to a fake CPU capability using a static key.
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>
(cherry picked from git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git
commit fc0e1299da548b32440051f58f08e0c1eb7edd0b)
Change-Id: I0f48eadf55ee97f09553380a62d9fffe54d9dc83
Signed-off-by: Greg Hackmann <ghackmann@google.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
Diffstat (limited to 'include/linux/debugobjects.h')
0 files changed, 0 insertions, 0 deletions