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// SPDX-License-Identifier: GPL-2.0-only
/*
* 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 "svm_util.h"
#include <string.h>
#include <sys/ioctl.h>
#include "kselftest.h"
enum {
PORT_L0_EXIT = 0x2000,
};
#define L2_GUEST_STACK_SIZE 64
static void l2_guest_code(void)
{
/* Exit to L0 */
asm volatile("inb %%dx, %%al"
: : [port] "d" (PORT_L0_EXIT) : "rax");
}
static void l1_vmx_code(struct vmx_pages *vmx_pages)
{
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);
}
static void l1_svm_code(struct svm_test_data *svm)
{
unsigned long l2_guest_stack[L2_GUEST_STACK_SIZE];
/* Prepare the VMCB for L2 execution. */
generic_svm_setup(svm, l2_guest_code,
&l2_guest_stack[L2_GUEST_STACK_SIZE]);
run_guest(svm->vmcb, svm->vmcb_gpa);
GUEST_ASSERT(0);
}
static void l1_guest_code(void *data)
{
if (this_cpu_has(X86_FEATURE_VMX))
l1_vmx_code(data);
else
l1_svm_code(data);
}
int main(int argc, char *argv[])
{
vm_vaddr_t guest_gva;
struct kvm_vcpu *vcpu;
struct kvm_vm *vm;
TEST_REQUIRE(kvm_cpu_has(X86_FEATURE_VMX) ||
kvm_cpu_has(X86_FEATURE_SVM));
vm = vm_create_with_one_vcpu(&vcpu, l1_guest_code);
if (kvm_cpu_has(X86_FEATURE_VMX))
vcpu_alloc_vmx(vm, &guest_gva);
else
vcpu_alloc_svm(vm, &guest_gva);
vcpu_args_set(vcpu, 1, guest_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);
}
}
}
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