130267b43SChenyi Qiang // SPDX-License-Identifier: GPL-2.0-only 230267b43SChenyi Qiang #include "test_util.h" 330267b43SChenyi Qiang #include "kvm_util.h" 430267b43SChenyi Qiang #include "processor.h" 530267b43SChenyi Qiang #include "vmx.h" 6*8357b9e1SMaxim Levitsky #include "svm_util.h" 730267b43SChenyi Qiang 830267b43SChenyi Qiang #include <string.h> 930267b43SChenyi Qiang #include <sys/ioctl.h> 1030267b43SChenyi Qiang 1130267b43SChenyi Qiang #include "kselftest.h" 1230267b43SChenyi Qiang 1330267b43SChenyi Qiang #define ARBITRARY_IO_PORT 0x2000 1430267b43SChenyi Qiang 1530267b43SChenyi Qiang /* The virtual machine object. */ 1630267b43SChenyi Qiang static struct kvm_vm *vm; 1730267b43SChenyi Qiang 1830267b43SChenyi Qiang static void l2_guest_code(void) 1930267b43SChenyi Qiang { 2030267b43SChenyi Qiang asm volatile("inb %%dx, %%al" 2130267b43SChenyi Qiang : : [port] "d" (ARBITRARY_IO_PORT) : "rax"); 2230267b43SChenyi Qiang } 2330267b43SChenyi Qiang 2430267b43SChenyi Qiang #define L2_GUEST_STACK_SIZE 64 2530267b43SChenyi Qiang unsigned long l2_guest_stack[L2_GUEST_STACK_SIZE]; 2630267b43SChenyi Qiang 27*8357b9e1SMaxim Levitsky void l1_guest_code_vmx(struct vmx_pages *vmx) 28*8357b9e1SMaxim Levitsky { 29*8357b9e1SMaxim Levitsky 3030267b43SChenyi Qiang GUEST_ASSERT(vmx->vmcs_gpa); 3130267b43SChenyi Qiang GUEST_ASSERT(prepare_for_vmx_operation(vmx)); 3230267b43SChenyi Qiang GUEST_ASSERT(load_vmcs(vmx)); 3330267b43SChenyi Qiang 3430267b43SChenyi Qiang prepare_vmcs(vmx, l2_guest_code, 3530267b43SChenyi Qiang &l2_guest_stack[L2_GUEST_STACK_SIZE]); 3630267b43SChenyi Qiang 3730267b43SChenyi Qiang GUEST_ASSERT(!vmlaunch()); 3830267b43SChenyi Qiang /* L2 should triple fault after a triple fault event injected. */ 3930267b43SChenyi Qiang GUEST_ASSERT(vmreadz(VM_EXIT_REASON) == EXIT_REASON_TRIPLE_FAULT); 4030267b43SChenyi Qiang GUEST_DONE(); 4130267b43SChenyi Qiang } 4230267b43SChenyi Qiang 43*8357b9e1SMaxim Levitsky void l1_guest_code_svm(struct svm_test_data *svm) 44*8357b9e1SMaxim Levitsky { 45*8357b9e1SMaxim Levitsky struct vmcb *vmcb = svm->vmcb; 46*8357b9e1SMaxim Levitsky 47*8357b9e1SMaxim Levitsky generic_svm_setup(svm, l2_guest_code, 48*8357b9e1SMaxim Levitsky &l2_guest_stack[L2_GUEST_STACK_SIZE]); 49*8357b9e1SMaxim Levitsky 50*8357b9e1SMaxim Levitsky /* don't intercept shutdown to test the case of SVM allowing to do so */ 51*8357b9e1SMaxim Levitsky vmcb->control.intercept &= ~(BIT(INTERCEPT_SHUTDOWN)); 52*8357b9e1SMaxim Levitsky 53*8357b9e1SMaxim Levitsky run_guest(vmcb, svm->vmcb_gpa); 54*8357b9e1SMaxim Levitsky 55*8357b9e1SMaxim Levitsky /* should not reach here, L1 should crash */ 56*8357b9e1SMaxim Levitsky GUEST_ASSERT(0); 57*8357b9e1SMaxim Levitsky } 58*8357b9e1SMaxim Levitsky 5930267b43SChenyi Qiang int main(void) 6030267b43SChenyi Qiang { 61f3443bedSSean Christopherson struct kvm_vcpu *vcpu; 6230267b43SChenyi Qiang struct kvm_run *run; 6330267b43SChenyi Qiang struct kvm_vcpu_events events; 6430267b43SChenyi Qiang struct ucall uc; 6530267b43SChenyi Qiang 66*8357b9e1SMaxim Levitsky bool has_vmx = kvm_cpu_has(X86_FEATURE_VMX); 67*8357b9e1SMaxim Levitsky bool has_svm = kvm_cpu_has(X86_FEATURE_SVM); 68*8357b9e1SMaxim Levitsky 69*8357b9e1SMaxim Levitsky TEST_REQUIRE(has_vmx || has_svm); 7030267b43SChenyi Qiang 717ed397d1SSean Christopherson TEST_REQUIRE(kvm_has_cap(KVM_CAP_X86_TRIPLE_FAULT_EVENT)); 7230267b43SChenyi Qiang 7330267b43SChenyi Qiang 74*8357b9e1SMaxim Levitsky if (has_vmx) { 75*8357b9e1SMaxim Levitsky vm_vaddr_t vmx_pages_gva; 76*8357b9e1SMaxim Levitsky 77*8357b9e1SMaxim Levitsky vm = vm_create_with_one_vcpu(&vcpu, l1_guest_code_vmx); 7830267b43SChenyi Qiang vcpu_alloc_vmx(vm, &vmx_pages_gva); 79768e9a61SSean Christopherson vcpu_args_set(vcpu, 1, vmx_pages_gva); 80*8357b9e1SMaxim Levitsky } else { 81*8357b9e1SMaxim Levitsky vm_vaddr_t svm_gva; 82*8357b9e1SMaxim Levitsky 83*8357b9e1SMaxim Levitsky vm = vm_create_with_one_vcpu(&vcpu, l1_guest_code_svm); 84*8357b9e1SMaxim Levitsky vcpu_alloc_svm(vm, &svm_gva); 85*8357b9e1SMaxim Levitsky vcpu_args_set(vcpu, 1, svm_gva); 86*8357b9e1SMaxim Levitsky } 87*8357b9e1SMaxim Levitsky 88*8357b9e1SMaxim Levitsky vm_enable_cap(vm, KVM_CAP_X86_TRIPLE_FAULT_EVENT, 1); 89*8357b9e1SMaxim Levitsky run = vcpu->run; 90768e9a61SSean Christopherson vcpu_run(vcpu); 9130267b43SChenyi Qiang 9230267b43SChenyi Qiang TEST_ASSERT(run->exit_reason == KVM_EXIT_IO, 9330267b43SChenyi Qiang "Expected KVM_EXIT_IO, got: %u (%s)\n", 9430267b43SChenyi Qiang run->exit_reason, exit_reason_str(run->exit_reason)); 9530267b43SChenyi Qiang TEST_ASSERT(run->io.port == ARBITRARY_IO_PORT, 9630267b43SChenyi Qiang "Expected IN from port %d from L2, got port %d", 9730267b43SChenyi Qiang ARBITRARY_IO_PORT, run->io.port); 98768e9a61SSean Christopherson vcpu_events_get(vcpu, &events); 9930267b43SChenyi Qiang events.flags |= KVM_VCPUEVENT_VALID_TRIPLE_FAULT; 10030267b43SChenyi Qiang events.triple_fault.pending = true; 101768e9a61SSean Christopherson vcpu_events_set(vcpu, &events); 10230267b43SChenyi Qiang run->immediate_exit = true; 103768e9a61SSean Christopherson vcpu_run_complete_io(vcpu); 10430267b43SChenyi Qiang 105768e9a61SSean Christopherson vcpu_events_get(vcpu, &events); 10630267b43SChenyi Qiang TEST_ASSERT(events.flags & KVM_VCPUEVENT_VALID_TRIPLE_FAULT, 10730267b43SChenyi Qiang "Triple fault event invalid"); 10830267b43SChenyi Qiang TEST_ASSERT(events.triple_fault.pending, 10930267b43SChenyi Qiang "No triple fault pending"); 110768e9a61SSean Christopherson vcpu_run(vcpu); 11130267b43SChenyi Qiang 112*8357b9e1SMaxim Levitsky 113*8357b9e1SMaxim Levitsky if (has_svm) { 114*8357b9e1SMaxim Levitsky TEST_ASSERT(run->exit_reason == KVM_EXIT_SHUTDOWN, 115*8357b9e1SMaxim Levitsky "Got exit_reason other than KVM_EXIT_SHUTDOWN: %u (%s)\n", 116*8357b9e1SMaxim Levitsky run->exit_reason, 117*8357b9e1SMaxim Levitsky exit_reason_str(run->exit_reason)); 118*8357b9e1SMaxim Levitsky } else { 119768e9a61SSean Christopherson switch (get_ucall(vcpu, &uc)) { 12030267b43SChenyi Qiang case UCALL_DONE: 12130267b43SChenyi Qiang break; 12230267b43SChenyi Qiang case UCALL_ABORT: 123594a1c27SColton Lewis REPORT_GUEST_ASSERT(uc); 12430267b43SChenyi Qiang default: 12530267b43SChenyi Qiang TEST_FAIL("Unexpected ucall: %lu", uc.cmd); 12630267b43SChenyi Qiang } 127*8357b9e1SMaxim Levitsky } 128*8357b9e1SMaxim Levitsky return 0; 12930267b43SChenyi Qiang } 130