Merge tag 'arm64-upstream' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64...

[linux-2.6-block.git] / arch / arm64 / include / asm / kvm_host.h

diff --git a/arch/arm64/include/asm/kvm_host.h b/arch/arm64/include/asm/kvm_host.h
index 3d6d7336f871221fd29bcc3bc4faa2cee0a7765f..2842bf149029becc92b20383d5c0894f465b2dc4 100644 (file)
--- a/arch/arm64/include/asm/kvm_host.h
+++ b/arch/arm64/include/asm/kvm_host.h
@@ -387,6 +387,8 @@ 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)
@@ -407,6 +409,15 @@ 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)