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x86: add CONFIG_X86_USERSPACE for Intel64

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Hidden config to select dependencies.

Signed-off-by: Andrew Boie <andrew.p.boie@intel.com>
This commit is contained in:
Andrew Boie 2019-11-21 12:52:37 -08:00 • committed by Anas Nashif
commit 06c4207602
1 changed files with 9 additions and 0 deletions
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9
arch/x86/core/Kconfig.intel64
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@ -75,4 +75,13 @@ config X86_STACK_PROTECTION
bounds of the current process stack are overflowed. This is done bounds of the current process stack are overflowed. This is done
by preceding all stack areas with a 4K guard page. by preceding all stack areas with a 4K guard page.
config X86_USERSPACE
bool
default y if USERSPACE
select THREAD_STACK_INFO
help
This option enables APIs to drop a thread's privileges down to ring 3,
supporting user-level threads that are protected from each other and
from crashing the kernel.
endif # X86_64 endif # X86_64