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| author | Will Deacon <will.deacon@arm.com> | 2017-11-14 17:38:19 +0300 |
|---|---|---|
| committer | Will Deacon <will.deacon@arm.com> | 2017-12-11 16:41:06 +0300 |
| commit | ea1e3de85e94d711f63437c04624aa0e8de5c8b3 (patch) | |
| tree | f390c46a0ddda1975269041456090a1f09e1ba35 /arch/arm64/Kconfig | |
| parent | 18011eac28c7cb31c87b86b7d0e5b01894405c7f (diff) | |
| download | linux-ea1e3de85e94d711f63437c04624aa0e8de5c8b3.tar.xz | |
arm64: entry: Add fake CPU feature for unmapping the kernel at EL0
Allow explicit disabling of the entry trampoline on the kernel command
line (kpti=off) by adding a fake CPU feature (ARM64_UNMAP_KERNEL_AT_EL0)
that can be used to toggle the alternative sequences in our entry code and
avoid use of the trampoline altogether if desired. This also allows us to
make use of a static key in arm64_kernel_unmapped_at_el0().
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/Kconfig')
0 files changed, 0 insertions, 0 deletions