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author | Marc Zyngier <maz@kernel.org> | 2020-11-27 14:47:08 +0300 |
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committer | Marc Zyngier <maz@kernel.org> | 2020-11-27 14:47:08 +0300 |
commit | dc2286f397e69989c803abfdb0d75ae90b88c98c (patch) | |
tree | f37b2b578b84a7186896ecb4540c7a160a5aff81 /arch/arm64/include/asm/kvm_mmu.h | |
parent | 6e5d8c713d1e0d1e3efb327dd61fdf01ffd256db (diff) | |
parent | 4f6a36fed71dfe51df0ae9a282dc87c76d629bff (diff) | |
download | linux-dc2286f397e69989c803abfdb0d75ae90b88c98c.tar.xz |
Merge branch 'kvm-arm64/vector-rework' into kvmarm-master/next
Signed-off-by: Marc Zyngier <maz@kernel.org>
Diffstat (limited to 'arch/arm64/include/asm/kvm_mmu.h')
-rw-r--r-- | arch/arm64/include/asm/kvm_mmu.h | 46 |
1 files changed, 0 insertions, 46 deletions
diff --git a/arch/arm64/include/asm/kvm_mmu.h b/arch/arm64/include/asm/kvm_mmu.h index 5633c5a27aad..e298191a854d 100644 --- a/arch/arm64/include/asm/kvm_mmu.h +++ b/arch/arm64/include/asm/kvm_mmu.h @@ -248,52 +248,6 @@ static inline int kvm_write_guest_lock(struct kvm *kvm, gpa_t gpa, return ret; } -/* - * EL2 vectors can be mapped and rerouted in a number of ways, - * depending on the kernel configuration and CPU present: - * - * - If the CPU is affected by Spectre-v2, the hardening sequence is - * placed in one of the vector slots, which is executed before jumping - * to the real vectors. - * - * - If the CPU also has the ARM64_HARDEN_EL2_VECTORS cap, the slot - * containing the hardening sequence is mapped next to the idmap page, - * and executed before jumping to the real vectors. - * - * - If the CPU only has the ARM64_HARDEN_EL2_VECTORS cap, then an - * empty slot is selected, mapped next to the idmap page, and - * executed before jumping to the real vectors. - * - * Note that ARM64_HARDEN_EL2_VECTORS is somewhat incompatible with - * VHE, as we don't have hypervisor-specific mappings. If the system - * is VHE and yet selects this capability, it will be ignored. - */ -extern void *__kvm_bp_vect_base; -extern int __kvm_harden_el2_vector_slot; - -static inline void *kvm_get_hyp_vector(void) -{ - struct bp_hardening_data *data = arm64_get_bp_hardening_data(); - void *vect = kern_hyp_va(kvm_ksym_ref(__kvm_hyp_vector)); - int slot = -1; - - if (cpus_have_const_cap(ARM64_SPECTRE_V2) && data->fn) { - vect = kern_hyp_va(kvm_ksym_ref(__bp_harden_hyp_vecs)); - slot = data->hyp_vectors_slot; - } - - if (this_cpu_has_cap(ARM64_HARDEN_EL2_VECTORS) && !has_vhe()) { - vect = __kvm_bp_vect_base; - if (slot == -1) - slot = __kvm_harden_el2_vector_slot; - } - - if (slot != -1) - vect += slot * SZ_2K; - - return vect; -} - #define kvm_phys_to_vttbr(addr) phys_to_ttbr(addr) static __always_inline u64 kvm_get_vttbr(struct kvm_s2_mmu *mmu) |