diff options
| -rw-r--r-- | arch/x86/kvm/vmx.c | 30 |
1 files changed, 29 insertions, 1 deletions
diff --git a/arch/x86/kvm/vmx.c b/arch/x86/kvm/vmx.c index 31e90e83fdd6..c76ca8c4befa 100644 --- a/arch/x86/kvm/vmx.c +++ b/arch/x86/kvm/vmx.c @@ -1684,6 +1684,12 @@ static inline bool cpu_has_vmx_virtual_intr_delivery(void) SECONDARY_EXEC_VIRTUAL_INTR_DELIVERY; } +static inline bool cpu_has_vmx_encls_vmexit(void) +{ + return vmcs_config.cpu_based_2nd_exec_ctrl & + SECONDARY_EXEC_ENCLS_EXITING; +} + /* * Comment's format: document - errata name - stepping - processor name. * Refer from @@ -4551,7 +4557,8 @@ static __init int setup_vmcs_config(struct vmcs_config *vmcs_conf) SECONDARY_EXEC_RDRAND_EXITING | SECONDARY_EXEC_ENABLE_PML | SECONDARY_EXEC_TSC_SCALING | - SECONDARY_EXEC_ENABLE_VMFUNC; + SECONDARY_EXEC_ENABLE_VMFUNC | + SECONDARY_EXEC_ENCLS_EXITING; if (adjust_vmx_controls(min2, opt2, MSR_IA32_VMX_PROCBASED_CTLS2, &_cpu_based_2nd_exec_control) < 0) @@ -6648,6 +6655,9 @@ static void vmx_vcpu_setup(struct vcpu_vmx *vmx) vmcs_write64(PML_ADDRESS, page_to_phys(vmx->pml_pg)); vmcs_write16(GUEST_PML_INDEX, PML_ENTITY_NUM - 1); } + + if (cpu_has_vmx_encls_vmexit()) + vmcs_write64(ENCLS_EXITING_BITMAP, -1ull); } static void vmx_vcpu_reset(struct kvm_vcpu *vcpu, bool init_event) @@ -9314,6 +9324,17 @@ fail: return 1; } +static int handle_encls(struct kvm_vcpu *vcpu) +{ + /* + * SGX virtualization is not yet supported. There is no software + * enable bit for SGX, so we have to trap ENCLS and inject a #UD + * to prevent the guest from executing ENCLS. + */ + kvm_queue_exception(vcpu, UD_VECTOR); + return 1; +} + /* * The exit handlers return 1 if the exit was handled fully and guest execution * may resume. Otherwise they set the kvm_run parameter to indicate what needs @@ -9371,6 +9392,7 @@ static int (*const kvm_vmx_exit_handlers[])(struct kvm_vcpu *vcpu) = { [EXIT_REASON_INVPCID] = handle_invpcid, [EXIT_REASON_VMFUNC] = handle_vmfunc, [EXIT_REASON_PREEMPTION_TIMER] = handle_preemption_timer, + [EXIT_REASON_ENCLS] = handle_encls, }; static const int kvm_vmx_max_exit_handlers = @@ -9741,6 +9763,9 @@ static bool nested_vmx_exit_reflected(struct kvm_vcpu *vcpu, u32 exit_reason) case EXIT_REASON_VMFUNC: /* VM functions are emulated through L2->L0 vmexits. */ return false; + case EXIT_REASON_ENCLS: + /* SGX is never exposed to L1 */ + return false; default: return true; } @@ -12101,6 +12126,9 @@ static int prepare_vmcs02(struct kvm_vcpu *vcpu, struct vmcs12 *vmcs12, if (exec_control & SECONDARY_EXEC_VIRTUALIZE_APIC_ACCESSES) vmcs_write64(APIC_ACCESS_ADDR, -1ull); + if (exec_control & SECONDARY_EXEC_ENCLS_EXITING) + vmcs_write64(ENCLS_EXITING_BITMAP, -1ull); + vmcs_write32(SECONDARY_VM_EXEC_CONTROL, exec_control); } |