arm64: Make BP hardening slot counter available

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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...

Acked-by: Catalin Marinas <catalin.marinas@arm.com>
Reviewed-by: Andrew Jones <drjones@redhat.com>
Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>

...

This commit is contained in:

Marc Zyngier 2018-03-13 12:40:39 +00:00

parent dc2e4633ff

commit 4205a89b80

3 changed files with 9 additions and 6 deletions

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3

arch/arm64/include/asm/mmu.h

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3

arch/arm64/kernel/bpi.S

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9

arch/arm64/kernel/cpu_errata.c

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