Commit c085b837 authored May 29, 2018 by Marc Zyngier Committed by Isaac J. Manjarres Jun 13, 2018

arm64: ssbd: Add global mitigation state accessor



We're about to need the mitigation state in various parts of the
kernel in order to do the right thing for userspace and guests.

Let's expose an accessor that will let other subsystems know
about the state.

Change-Id: I8c96e8980817ea336935eda2729b023ec56a818e
Reviewed-by: Julien Grall <julien.grall@arm.com>
Reviewed-by: Mark Rutland <mark.rutland@arm.com>
Acked-by: Will Deacon <will.deacon@arm.com>
Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
Git-commit: c32e1736ca03904c03de0e4459a673be194f56fd
Git-repo: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git


Signed-off-by: Isaac J. Manjarres <isaacm@codeaurora.org>

parent 98617828

arch/arm64/include/asm/cpufeature.h

+10 −0

Original line number	Diff line number	Diff line
		@@ -268,6 +268,16 @@ static inline bool system_uses_ttbr0_pan(void)
		!cpus_have_const_cap(ARM64_HAS_PAN);
		}

		static inline int arm64_get_ssbd_state(void)
		{
		#ifdef CONFIG_ARM64_SSBD
		extern int ssbd_state;
		return ssbd_state;
		#else
		return ARM64_SSBD_UNKNOWN;
		#endif
		}

		#endif /* __ASSEMBLY__ */

		#endif