// SPDX-License-Identifier: GPL-2.0-only
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/*
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* vmx_close_while_nested
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*
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* Copyright (C) 2019, Red Hat, Inc.
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*
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* Verify that nothing bad happens if a KVM user exits with open
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* file descriptors while executing a nested guest.
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*/
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#include "test_util.h"
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#include "kvm_util.h"
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#include "processor.h"
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#include "vmx.h"
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#include <string.h>
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#include <sys/ioctl.h>
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#include "kselftest.h"
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#define VCPU_ID 5
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enum {
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PORT_L0_EXIT = 0x2000,
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};
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/* The virtual machine object. */
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static struct kvm_vm *vm;
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static void l2_guest_code(void)
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{
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/* Exit to L0 */
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asm volatile("inb %%dx, %%al"
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: : [port] "d" (PORT_L0_EXIT) : "rax");
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}
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static void l1_guest_code(struct vmx_pages *vmx_pages)
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{
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#define L2_GUEST_STACK_SIZE 64
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unsigned long l2_guest_stack[L2_GUEST_STACK_SIZE];
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GUEST_ASSERT(prepare_for_vmx_operation(vmx_pages));
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GUEST_ASSERT(load_vmcs(vmx_pages));
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/* Prepare the VMCS for L2 execution. */
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prepare_vmcs(vmx_pages, l2_guest_code,
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&l2_guest_stack[L2_GUEST_STACK_SIZE]);
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GUEST_ASSERT(!vmlaunch());
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GUEST_ASSERT(0);
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}
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int main(int argc, char *argv[])
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{
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vm_vaddr_t vmx_pages_gva;
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nested_vmx_check_supported();
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vm = vm_create_default(VCPU_ID, 0, (void *) l1_guest_code);
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vcpu_set_cpuid(vm, VCPU_ID, kvm_get_supported_cpuid());
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/* Allocate VMX pages and shared descriptors (vmx_pages). */
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vcpu_alloc_vmx(vm, &vmx_pages_gva);
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vcpu_args_set(vm, VCPU_ID, 1, vmx_pages_gva);
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for (;;) {
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volatile struct kvm_run *run = vcpu_state(vm, VCPU_ID);
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struct ucall uc;
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vcpu_run(vm, VCPU_ID);
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TEST_ASSERT(run->exit_reason == KVM_EXIT_IO,
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"Got exit_reason other than KVM_EXIT_IO: %u (%s)\n",
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run->exit_reason,
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exit_reason_str(run->exit_reason));
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if (run->io.port == PORT_L0_EXIT)
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break;
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switch (get_ucall(vm, VCPU_ID, &uc)) {
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case UCALL_ABORT:
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TEST_FAIL("%s", (const char *)uc.args[0]);
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/* NOT REACHED */
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default:
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TEST_FAIL("Unknown ucall %lu", uc.cmd);
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}
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}
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}
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