125 lines
2.9 KiB
C
125 lines
2.9 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
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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 "svm_util.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 ARBITRARY_IO_PORT 0x2000
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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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asm volatile("inb %%dx, %%al"
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: : [port] "d" (ARBITRARY_IO_PORT) : "rax");
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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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void l1_guest_code_vmx(struct vmx_pages *vmx)
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{
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GUEST_ASSERT(vmx->vmcs_gpa);
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GUEST_ASSERT(prepare_for_vmx_operation(vmx));
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GUEST_ASSERT(load_vmcs(vmx));
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prepare_vmcs(vmx, 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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/* L2 should triple fault after a triple fault event injected. */
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GUEST_ASSERT(vmreadz(VM_EXIT_REASON) == EXIT_REASON_TRIPLE_FAULT);
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GUEST_DONE();
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}
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void l1_guest_code_svm(struct svm_test_data *svm)
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{
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struct vmcb *vmcb = svm->vmcb;
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generic_svm_setup(svm, l2_guest_code,
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&l2_guest_stack[L2_GUEST_STACK_SIZE]);
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/* don't intercept shutdown to test the case of SVM allowing to do so */
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vmcb->control.intercept &= ~(BIT(INTERCEPT_SHUTDOWN));
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run_guest(vmcb, svm->vmcb_gpa);
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/* should not reach here, L1 should crash */
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GUEST_ASSERT(0);
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}
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int main(void)
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{
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struct kvm_vcpu *vcpu;
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struct kvm_run *run;
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struct kvm_vcpu_events events;
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struct ucall uc;
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bool has_vmx = kvm_cpu_has(X86_FEATURE_VMX);
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bool has_svm = kvm_cpu_has(X86_FEATURE_SVM);
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TEST_REQUIRE(has_vmx || has_svm);
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TEST_REQUIRE(kvm_has_cap(KVM_CAP_X86_TRIPLE_FAULT_EVENT));
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if (has_vmx) {
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vm_vaddr_t vmx_pages_gva;
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vm = vm_create_with_one_vcpu(&vcpu, l1_guest_code_vmx);
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vcpu_alloc_vmx(vm, &vmx_pages_gva);
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vcpu_args_set(vcpu, 1, vmx_pages_gva);
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} else {
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vm_vaddr_t svm_gva;
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vm = vm_create_with_one_vcpu(&vcpu, l1_guest_code_svm);
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vcpu_alloc_svm(vm, &svm_gva);
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vcpu_args_set(vcpu, 1, svm_gva);
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}
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vm_enable_cap(vm, KVM_CAP_X86_TRIPLE_FAULT_EVENT, 1);
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run = vcpu->run;
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vcpu_run(vcpu);
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TEST_ASSERT_KVM_EXIT_REASON(vcpu, KVM_EXIT_IO);
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TEST_ASSERT(run->io.port == ARBITRARY_IO_PORT,
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"Expected IN from port %d from L2, got port %d",
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ARBITRARY_IO_PORT, run->io.port);
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vcpu_events_get(vcpu, &events);
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events.flags |= KVM_VCPUEVENT_VALID_TRIPLE_FAULT;
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events.triple_fault.pending = true;
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vcpu_events_set(vcpu, &events);
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run->immediate_exit = true;
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vcpu_run_complete_io(vcpu);
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vcpu_events_get(vcpu, &events);
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TEST_ASSERT(events.flags & KVM_VCPUEVENT_VALID_TRIPLE_FAULT,
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"Triple fault event invalid");
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TEST_ASSERT(events.triple_fault.pending,
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"No triple fault pending");
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vcpu_run(vcpu);
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if (has_svm) {
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TEST_ASSERT_KVM_EXIT_REASON(vcpu, KVM_EXIT_SHUTDOWN);
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} else {
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switch (get_ucall(vcpu, &uc)) {
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case UCALL_DONE:
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break;
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case UCALL_ABORT:
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REPORT_GUEST_ASSERT(uc);
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default:
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TEST_FAIL("Unexpected ucall: %lu", uc.cmd);
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}
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}
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return 0;
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}
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