1 // SPDX-License-Identifier: GPL-2.0-only 2 #include "test_util.h" 3 #include "kvm_util.h" 4 #include "processor.h" 5 #include "vmx.h" 6 7 #include <string.h> 8 #include <sys/ioctl.h> 9 10 #include "kselftest.h" 11 12 #define ARBITRARY_IO_PORT 0x2000 13 14 /* The virtual machine object. */ 15 static struct kvm_vm *vm; 16 17 static void l2_guest_code(void) 18 { 19 asm volatile("inb %%dx, %%al" 20 : : [port] "d" (ARBITRARY_IO_PORT) : "rax"); 21 } 22 23 void l1_guest_code(struct vmx_pages *vmx) 24 { 25 #define L2_GUEST_STACK_SIZE 64 26 unsigned long l2_guest_stack[L2_GUEST_STACK_SIZE]; 27 28 GUEST_ASSERT(vmx->vmcs_gpa); 29 GUEST_ASSERT(prepare_for_vmx_operation(vmx)); 30 GUEST_ASSERT(load_vmcs(vmx)); 31 32 prepare_vmcs(vmx, l2_guest_code, 33 &l2_guest_stack[L2_GUEST_STACK_SIZE]); 34 35 GUEST_ASSERT(!vmlaunch()); 36 /* L2 should triple fault after a triple fault event injected. */ 37 GUEST_ASSERT(vmreadz(VM_EXIT_REASON) == EXIT_REASON_TRIPLE_FAULT); 38 GUEST_DONE(); 39 } 40 41 int main(void) 42 { 43 struct kvm_vcpu *vcpu; 44 struct kvm_run *run; 45 struct kvm_vcpu_events events; 46 vm_vaddr_t vmx_pages_gva; 47 struct ucall uc; 48 49 TEST_REQUIRE(kvm_cpu_has(X86_FEATURE_VMX)); 50 51 TEST_REQUIRE(kvm_has_cap(KVM_CAP_X86_TRIPLE_FAULT_EVENT)); 52 53 vm = vm_create_with_one_vcpu(&vcpu, l1_guest_code); 54 vm_enable_cap(vm, KVM_CAP_X86_TRIPLE_FAULT_EVENT, 1); 55 56 run = vcpu->run; 57 vcpu_alloc_vmx(vm, &vmx_pages_gva); 58 vcpu_args_set(vcpu, 1, vmx_pages_gva); 59 vcpu_run(vcpu); 60 61 TEST_ASSERT(run->exit_reason == KVM_EXIT_IO, 62 "Expected KVM_EXIT_IO, got: %u (%s)\n", 63 run->exit_reason, exit_reason_str(run->exit_reason)); 64 TEST_ASSERT(run->io.port == ARBITRARY_IO_PORT, 65 "Expected IN from port %d from L2, got port %d", 66 ARBITRARY_IO_PORT, run->io.port); 67 vcpu_events_get(vcpu, &events); 68 events.flags |= KVM_VCPUEVENT_VALID_TRIPLE_FAULT; 69 events.triple_fault.pending = true; 70 vcpu_events_set(vcpu, &events); 71 run->immediate_exit = true; 72 vcpu_run_complete_io(vcpu); 73 74 vcpu_events_get(vcpu, &events); 75 TEST_ASSERT(events.flags & KVM_VCPUEVENT_VALID_TRIPLE_FAULT, 76 "Triple fault event invalid"); 77 TEST_ASSERT(events.triple_fault.pending, 78 "No triple fault pending"); 79 vcpu_run(vcpu); 80 81 switch (get_ucall(vcpu, &uc)) { 82 case UCALL_DONE: 83 break; 84 case UCALL_ABORT: 85 REPORT_GUEST_ASSERT(uc); 86 default: 87 TEST_FAIL("Unexpected ucall: %lu", uc.cmd); 88 } 89 90 } 91