[PATCH v6 24/26] arm64: Make BP hardening slot counter available

[Andrew Jones]

On Wed, Mar 14, 2018 at 04:50:47PM +0000, Marc Zyngier wrote:
> We're about to need to allocate hardening slots from other parts
> of the kernel (in order to support ARM64_HARDEN_EL2_VECTORS).
> 
> Turn the counter into an atomic_t and make it available to the
> rest of the kernel. Also add BP_HARDEN_EL2_SLOTS as the number of
> slots instead of the hardcoded 4...
> 
> Signed-off-by: Marc Zyngier <marc.zyngier at arm.com>
> ---
>  arch/arm64/include/asm/mmu.h   | 3 +++
>  arch/arm64/kernel/bpi.S        | 3 ++-
>  arch/arm64/kernel/cpu_errata.c | 9 ++++-----
>  3 files changed, 9 insertions(+), 6 deletions(-)
>

Reviewed-by: Andrew Jones <drjones at redhat.com>