Merge tag 'kvm-4.20-1' of git://git.kernel.org/pub/scm/virt/kvm/kvm
[platform/kernel/linux-starfive.git] / arch / arm64 / include / asm / kvm_host.h
index f84052f..52fbc82 100644 (file)
@@ -389,6 +389,8 @@ struct kvm_vcpu *kvm_mpidr_to_vcpu(struct kvm *kvm, unsigned long mpidr);
 
 DECLARE_PER_CPU(kvm_cpu_context_t, kvm_host_cpu_state);
 
+void __kvm_enable_ssbs(void);
+
 static inline void __cpu_init_hyp_mode(phys_addr_t pgd_ptr,
                                       unsigned long hyp_stack_ptr,
                                       unsigned long vector_ptr)
@@ -409,6 +411,15 @@ static inline void __cpu_init_hyp_mode(phys_addr_t pgd_ptr,
         */
        BUG_ON(!static_branch_likely(&arm64_const_caps_ready));
        __kvm_call_hyp((void *)pgd_ptr, hyp_stack_ptr, vector_ptr, tpidr_el2);
+
+       /*
+        * Disabling SSBD on a non-VHE system requires us to enable SSBS
+        * at EL2.
+        */
+       if (!has_vhe() && this_cpu_has_cap(ARM64_SSBS) &&
+           arm64_get_ssbd_state() == ARM64_SSBD_FORCE_DISABLE) {
+               kvm_call_hyp(__kvm_enable_ssbs);
+       }
 }
 
 static inline bool kvm_arch_check_sve_has_vhe(void)