diff options
Diffstat (limited to 'tools/testing/selftests/kvm/x86_64/evmcs_test.c')
| -rw-r--r-- | tools/testing/selftests/kvm/x86_64/evmcs_test.c | 220 |
1 files changed, 0 insertions, 220 deletions
diff --git a/tools/testing/selftests/kvm/x86_64/evmcs_test.c b/tools/testing/selftests/kvm/x86_64/evmcs_test.c deleted file mode 100644 index 4c7841dfd481..000000000000 --- a/tools/testing/selftests/kvm/x86_64/evmcs_test.c +++ /dev/null @@ -1,220 +0,0 @@ -// SPDX-License-Identifier: GPL-2.0 -/* - * Copyright (C) 2018, Red Hat, Inc. - * - * Tests for Enlightened VMCS, including nested guest state. - */ -#define _GNU_SOURCE /* for program_invocation_short_name */ -#include <fcntl.h> -#include <stdio.h> -#include <stdlib.h> -#include <string.h> -#include <sys/ioctl.h> - -#include "test_util.h" - -#include "kvm_util.h" - -#include "vmx.h" - -#define VCPU_ID 5 -#define NMI_VECTOR 2 - -static int ud_count; - -static void guest_ud_handler(struct ex_regs *regs) -{ - ud_count++; - regs->rip += 3; /* VMLAUNCH */ -} - -static void guest_nmi_handler(struct ex_regs *regs) -{ -} - -void l2_guest_code(void) -{ - GUEST_SYNC(7); - - GUEST_SYNC(8); - - /* Forced exit to L1 upon restore */ - GUEST_SYNC(9); - - /* Done, exit to L1 and never come back. */ - vmcall(); -} - -void guest_code(struct vmx_pages *vmx_pages) -{ -#define L2_GUEST_STACK_SIZE 64 - unsigned long l2_guest_stack[L2_GUEST_STACK_SIZE]; - - x2apic_enable(); - - GUEST_SYNC(1); - GUEST_SYNC(2); - - enable_vp_assist(vmx_pages->vp_assist_gpa, vmx_pages->vp_assist); - - GUEST_ASSERT(vmx_pages->vmcs_gpa); - GUEST_ASSERT(prepare_for_vmx_operation(vmx_pages)); - GUEST_SYNC(3); - GUEST_ASSERT(load_vmcs(vmx_pages)); - GUEST_ASSERT(vmptrstz() == vmx_pages->enlightened_vmcs_gpa); - - GUEST_SYNC(4); - GUEST_ASSERT(vmptrstz() == vmx_pages->enlightened_vmcs_gpa); - - prepare_vmcs(vmx_pages, l2_guest_code, - &l2_guest_stack[L2_GUEST_STACK_SIZE]); - - GUEST_SYNC(5); - GUEST_ASSERT(vmptrstz() == vmx_pages->enlightened_vmcs_gpa); - current_evmcs->revision_id = -1u; - GUEST_ASSERT(vmlaunch()); - current_evmcs->revision_id = EVMCS_VERSION; - GUEST_SYNC(6); - - current_evmcs->pin_based_vm_exec_control |= - PIN_BASED_NMI_EXITING; - GUEST_ASSERT(!vmlaunch()); - GUEST_ASSERT(vmptrstz() == vmx_pages->enlightened_vmcs_gpa); - - /* - * NMI forces L2->L1 exit, resuming L2 and hope that EVMCS is - * up-to-date (RIP points where it should and not at the beginning - * of l2_guest_code(). GUEST_SYNC(9) checkes that. - */ - GUEST_ASSERT(!vmresume()); - - GUEST_SYNC(10); - - GUEST_ASSERT(vmreadz(VM_EXIT_REASON) == EXIT_REASON_VMCALL); - GUEST_SYNC(11); - - /* Try enlightened vmptrld with an incorrect GPA */ - evmcs_vmptrld(0xdeadbeef, vmx_pages->enlightened_vmcs); - GUEST_ASSERT(vmlaunch()); - GUEST_ASSERT(ud_count == 1); - GUEST_DONE(); -} - -void inject_nmi(struct kvm_vm *vm) -{ - struct kvm_vcpu_events events; - - vcpu_events_get(vm, VCPU_ID, &events); - - events.nmi.pending = 1; - events.flags |= KVM_VCPUEVENT_VALID_NMI_PENDING; - - vcpu_events_set(vm, VCPU_ID, &events); -} - -static void save_restore_vm(struct kvm_vm *vm) -{ - struct kvm_regs regs1, regs2; - struct kvm_x86_state *state; - - state = vcpu_save_state(vm, VCPU_ID); - memset(®s1, 0, sizeof(regs1)); - vcpu_regs_get(vm, VCPU_ID, ®s1); - - kvm_vm_release(vm); - - /* Restore state in a new VM. */ - kvm_vm_restart(vm, O_RDWR); - vm_vcpu_add(vm, VCPU_ID); - vcpu_set_hv_cpuid(vm, VCPU_ID); - vcpu_enable_evmcs(vm, VCPU_ID); - vcpu_load_state(vm, VCPU_ID, state); - kvm_x86_state_cleanup(state); - - memset(®s2, 0, sizeof(regs2)); - vcpu_regs_get(vm, VCPU_ID, ®s2); - TEST_ASSERT(!memcmp(®s1, ®s2, sizeof(regs2)), - "Unexpected register values after vcpu_load_state; rdi: %lx rsi: %lx", - (ulong) regs2.rdi, (ulong) regs2.rsi); -} - -int main(int argc, char *argv[]) -{ - vm_vaddr_t vmx_pages_gva = 0; - - struct kvm_vm *vm; - struct kvm_run *run; - struct ucall uc; - int stage; - - /* Create VM */ - vm = vm_create_default(VCPU_ID, 0, guest_code); - - if (!nested_vmx_supported() || - !kvm_check_cap(KVM_CAP_NESTED_STATE) || - !kvm_check_cap(KVM_CAP_HYPERV_ENLIGHTENED_VMCS)) { - print_skip("Enlightened VMCS is unsupported"); - exit(KSFT_SKIP); - } - - vcpu_set_hv_cpuid(vm, VCPU_ID); - vcpu_enable_evmcs(vm, VCPU_ID); - - vcpu_alloc_vmx(vm, &vmx_pages_gva); - vcpu_args_set(vm, VCPU_ID, 1, vmx_pages_gva); - - vm_init_descriptor_tables(vm); - vcpu_init_descriptor_tables(vm, VCPU_ID); - vm_install_exception_handler(vm, UD_VECTOR, guest_ud_handler); - vm_install_exception_handler(vm, NMI_VECTOR, guest_nmi_handler); - - pr_info("Running L1 which uses EVMCS to run L2\n"); - - for (stage = 1;; stage++) { - run = vcpu_state(vm, VCPU_ID); - _vcpu_run(vm, VCPU_ID); - TEST_ASSERT(run->exit_reason == KVM_EXIT_IO, - "Stage %d: unexpected exit reason: %u (%s),\n", - stage, run->exit_reason, - exit_reason_str(run->exit_reason)); - - switch (get_ucall(vm, VCPU_ID, &uc)) { - case UCALL_ABORT: - TEST_FAIL("%s at %s:%ld", (const char *)uc.args[0], - __FILE__, uc.args[1]); - /* NOT REACHED */ - case UCALL_SYNC: - break; - case UCALL_DONE: - goto done; - default: - TEST_FAIL("Unknown ucall %lu", uc.cmd); - } - - /* UCALL_SYNC is handled here. */ - TEST_ASSERT(!strcmp((const char *)uc.args[0], "hello") && - uc.args[1] == stage, "Stage %d: Unexpected register values vmexit, got %lx", - stage, (ulong)uc.args[1]); - - save_restore_vm(vm); - - /* Force immediate L2->L1 exit before resuming */ - if (stage == 8) { - pr_info("Injecting NMI into L1 before L2 had a chance to run after restore\n"); - inject_nmi(vm); - } - - /* - * Do KVM_GET_NESTED_STATE/KVM_SET_NESTED_STATE for a freshly - * restored VM (before the first KVM_RUN) to check that - * KVM_STATE_NESTED_EVMCS is not lost. - */ - if (stage == 9) { - pr_info("Trying extra KVM_GET_NESTED_STATE/KVM_SET_NESTED_STATE cycle\n"); - save_restore_vm(vm); - } - } - -done: - kvm_vm_free(vm); -} |