diff options
Diffstat (limited to 'arch/arm64/include')
| -rw-r--r-- | arch/arm64/include/asm/kvm_mmu.h | 38 |
1 files changed, 38 insertions, 0 deletions
diff --git a/arch/arm64/include/asm/kvm_mmu.h b/arch/arm64/include/asm/kvm_mmu.h index b33bdb5eeb3d..72e279dbae5f 100644 --- a/arch/arm64/include/asm/kvm_mmu.h +++ b/arch/arm64/include/asm/kvm_mmu.h @@ -322,6 +322,44 @@ static inline unsigned int kvm_get_vmid_bits(void) return (cpuid_feature_extract_unsigned_field(reg, ID_AA64MMFR1_VMIDBITS_SHIFT) == 2) ? 16 : 8; } +#ifdef CONFIG_HARDEN_BRANCH_PREDICTOR +#include <asm/mmu.h> + +static inline void *kvm_get_hyp_vector(void) +{ + struct bp_hardening_data *data = arm64_get_bp_hardening_data(); + void *vect = kvm_ksym_ref(__kvm_hyp_vector); + + if (data->fn) { + vect = __bp_harden_hyp_vecs_start + + data->hyp_vectors_slot * SZ_2K; + + if (!has_vhe()) + vect = lm_alias(vect); + } + + return vect; +} + +static inline int kvm_map_vectors(void) +{ + return create_hyp_mappings(kvm_ksym_ref(__bp_harden_hyp_vecs_start), + kvm_ksym_ref(__bp_harden_hyp_vecs_end), + PAGE_HYP_EXEC); +} + +#else +static inline void *kvm_get_hyp_vector(void) +{ + return kvm_ksym_ref(__kvm_hyp_vector); +} + +static inline int kvm_map_vectors(void) +{ + return 0; +} +#endif + #define kvm_phys_to_vttbr(addr) phys_to_ttbr(addr) #endif /* __ASSEMBLY__ */ |