| // SPDX-License-Identifier: GPL-2.0-only |
| /* |
| * vmx_close_while_nested |
| * |
| * Copyright (C) 2019, Red Hat, Inc. |
| * |
| * Verify that nothing bad happens if a KVM user exits with open |
| * file descriptors while executing a nested guest. |
| */ |
| |
| #include "test_util.h" |
| #include "kvm_util.h" |
| #include "processor.h" |
| #include "vmx.h" |
| |
| #include <string.h> |
| #include <sys/ioctl.h> |
| |
| #include "kselftest.h" |
| |
| enum { |
| PORT_L0_EXIT = 0x2000, |
| }; |
| |
| static void l2_guest_code(void) |
| { |
| /* Exit to L0 */ |
| asm volatile("inb %%dx, %%al" |
| : : [port] "d" (PORT_L0_EXIT) : "rax"); |
| } |
| |
| static void l1_guest_code(struct vmx_pages *vmx_pages) |
| { |
| #define L2_GUEST_STACK_SIZE 64 |
| unsigned long l2_guest_stack[L2_GUEST_STACK_SIZE]; |
| |
| GUEST_ASSERT(prepare_for_vmx_operation(vmx_pages)); |
| GUEST_ASSERT(load_vmcs(vmx_pages)); |
| |
| /* Prepare the VMCS for L2 execution. */ |
| prepare_vmcs(vmx_pages, l2_guest_code, |
| &l2_guest_stack[L2_GUEST_STACK_SIZE]); |
| |
| GUEST_ASSERT(!vmlaunch()); |
| GUEST_ASSERT(0); |
| } |
| |
| int main(int argc, char *argv[]) |
| { |
| vm_vaddr_t vmx_pages_gva; |
| struct kvm_vcpu *vcpu; |
| struct kvm_vm *vm; |
| |
| TEST_REQUIRE(kvm_cpu_has(X86_FEATURE_VMX)); |
| |
| vm = vm_create_with_one_vcpu(&vcpu, l1_guest_code); |
| |
| /* Allocate VMX pages and shared descriptors (vmx_pages). */ |
| vcpu_alloc_vmx(vm, &vmx_pages_gva); |
| vcpu_args_set(vcpu, 1, vmx_pages_gva); |
| |
| for (;;) { |
| volatile struct kvm_run *run = vcpu->run; |
| struct ucall uc; |
| |
| vcpu_run(vcpu); |
| TEST_ASSERT_KVM_EXIT_REASON(vcpu, KVM_EXIT_IO); |
| |
| if (run->io.port == PORT_L0_EXIT) |
| break; |
| |
| switch (get_ucall(vcpu, &uc)) { |
| case UCALL_ABORT: |
| REPORT_GUEST_ASSERT(uc); |
| /* NOT REACHED */ |
| default: |
| TEST_FAIL("Unknown ucall %lu", uc.cmd); |
| } |
| } |
| } |