Commit 8d6907af authored by Marc Zyngier's avatar Marc Zyngier Committed by Greg Kroah-Hartman

arm64: ssbd: Add global mitigation state accessor

commit c32e1736 upstream.

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.
Reviewed-by: default avatarJulien Grall <julien.grall@arm.com>
Reviewed-by: default avatarMark Rutland <mark.rutland@arm.com>
Acked-by: default avatarWill Deacon <will.deacon@arm.com>
Signed-off-by: default avatarMarc Zyngier <marc.zyngier@arm.com>
Signed-off-by: default avatarCatalin Marinas <catalin.marinas@arm.com>
Signed-off-by: default avatarMarc Zyngier <marc.zyngier@arm.com>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent 45808ab2
......@@ -268,6 +268,16 @@ static inline bool system_uses_ttbr0_pan(void)
#define ARM64_SSBD_FORCE_ENABLE 2
#define ARM64_SSBD_MITIGATED 3
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
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