]> git.proxmox.com Git - mirror_ubuntu-eoan-kernel.git/commit
arm64: kpti: Use early_param for kpti= command-line option
authorWill Deacon <will.deacon@arm.com>
Fri, 22 Jun 2018 09:25:25 +0000 (10:25 +0100)
committerCatalin Marinas <catalin.marinas@arm.com>
Fri, 22 Jun 2018 16:23:26 +0000 (17:23 +0100)
commitb5b7dd647f2d21b93f734ce890671cd908e69b0a
treea2cc270c943d8e699057e8eb4b03bbeda0e59315
parentb154886f7892499d0d3054026e19dfb9a731df61
arm64: kpti: Use early_param for kpti= command-line option

We inspect __kpti_forced early on as part of the cpufeature enable
callback which remaps the swapper page table using non-global entries.

Ensure that __kpti_forced has been updated to reflect the kpti=
command-line option before we start using it.

Fixes: ea1e3de85e94 ("arm64: entry: Add fake CPU feature for unmapping the kernel at EL0")
Cc: <stable@vger.kernel.org> # 4.16.x-
Reported-by: Wei Xu <xuwei5@hisilicon.com>
Tested-by: Sudeep Holla <sudeep.holla@arm.com>
Tested-by: Wei Xu <xuwei5@hisilicon.com>
Signed-off-by: Will Deacon <will.deacon@arm.com>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
arch/arm64/kernel/cpufeature.c