diff options
| author | Marc Zyngier <marc.zyngier@arm.com> | 2018-02-15 11:47:14 +0000 |
|---|---|---|
| committer | Marc Zyngier <marc.zyngier@arm.com> | 2018-03-19 13:06:46 +0000 |
| commit | dee39247dc75465a24990cb1772c6aaced5fd910 (patch) | |
| tree | fb6f241d24eaee60ad33127a318521dccae02661 /arch/arm64/kvm/va_layout.c | |
| parent | 4205a89b8060141ac0216a507b9f70728f056a10 (diff) | |
arm64: KVM: Allow mapping of vectors outside of the RAM region
We're now ready to map our vectors in weird and wonderful locations.
On enabling ARM64_HARDEN_EL2_VECTORS, a vector slot gets allocated
if this hasn't been already done via ARM64_HARDEN_BRANCH_PREDICTOR
and gets mapped outside of the normal RAM region, next to the
idmap.
That way, being able to obtain VBAR_EL2 doesn't reveal the mapping
of the rest of the hypervisor code.
Acked-by: Catalin Marinas <catalin.marinas@arm.com>
Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
Diffstat (limited to 'arch/arm64/kvm/va_layout.c')
| -rw-r--r-- | arch/arm64/kvm/va_layout.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/arch/arm64/kvm/va_layout.c b/arch/arm64/kvm/va_layout.c index 2deb6e9874c9..c712a7376bc1 100644 --- a/arch/arm64/kvm/va_layout.c +++ b/arch/arm64/kvm/va_layout.c @@ -151,6 +151,9 @@ void __init kvm_update_va_mask(struct alt_instr *alt, } } +void *__kvm_bp_vect_base; +int __kvm_harden_el2_vector_slot; + void kvm_patch_vector_branch(struct alt_instr *alt, __le32 *origptr, __le32 *updptr, int nr_inst) { |