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arm64: kpti: force off kpti

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Since most of the CPUs aren't prone to meltdown,
force off the kpti feature. Enable on required
targets.

Change-Id: If78c70bcaeac2b157a901e5036190aaf9e5aabf6
Signed-off-by: Vinayak Menon <vinmenon@codeaurora.org>
This commit is contained in:
Vinayak Menon 2020-03-12 12:21:47 +05:30 • committed by Gerrit - the friendly Code Review server
commit 1edf9722d4
1 changed files with 2 additions and 1 deletions
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3
arch/arm64/kernel/cpufeature.c
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@ -966,7 +966,8 @@ has_useable_cnp(const struct arm64_cpu_capabilities *entry, int scope)
}
static bool __meltdown_safe = true;
static int __kpti_forced; /* 0: not forced, >0: forced on, <0: forced off */
/* 0: not forced, >0: forced on, <0: forced off */
static int __kpti_forced = -1;
static bool unmap_kernel_at_el0(const struct arm64_cpu_capabilities *entry,
int scope)