KVM: selftests: Convert evmcs_test away from VCPU_ID

Convert evmcs_test to use vm_create_with_one_vcpu() and pass around a
'struct kvm_vcpu' object instead of using a global VCPU_ID.  Note, this is
a "functional" change in the sense that the test now creates a vCPU with
vcpu_id==0 instead of vcpu_id==5.  The non-zero VCPU_ID was 100% arbitrary
and added little to no validation coverage.  If testing non-zero vCPU IDs
is desirable for generic tests, that can be done in the future by tweaking
the VM creation helpers.

Opportunistically use vcpu_run() instead of _vcpu_run(), the test expects
KVM_RUN to succeed.

Signed-off-by: Sean Christopherson <seanjc@google.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>

diff --git a/tools/testing/selftests/kvm/x86_64/evmcs_test.c b/tools/testing/selftests/kvm/x86_64/evmcs_test.c
index 78668605f673028590e1541be57441a43f25da97..ba39042a5d967883dc43bee32acc2977c0fbb5e4 100644 (file)
--- a/tools/testing/selftests/kvm/x86_64/evmcs_test.c
+++ b/tools/testing/selftests/kvm/x86_64/evmcs_test.c
@@ -18,8 +18,6 @@
 
 #include "vmx.h"
 
-#define VCPU_ID                5
-
 static int ud_count;
 
 static void guest_ud_handler(struct ex_regs *regs)
@@ -159,55 +157,56 @@ void guest_code(struct vmx_pages *vmx_pages)
        GUEST_DONE();
 }
 
-void inject_nmi(struct kvm_vm *vm)
+void inject_nmi(struct kvm_vcpu *vcpu)
 {
        struct kvm_vcpu_events events;
 
-       vcpu_events_get(vm, VCPU_ID, &events);
+       vcpu_events_get(vcpu->vm, vcpu->id, &events);
 
        events.nmi.pending = 1;
        events.flags |= KVM_VCPUEVENT_VALID_NMI_PENDING;
 
-       vcpu_events_set(vm, VCPU_ID, &events);
+       vcpu_events_set(vcpu->vm, vcpu->id, &events);
 }
 
-static void save_restore_vm(struct kvm_vm *vm)
+static struct kvm_vcpu *save_restore_vm(struct kvm_vm *vm,
+                                       struct kvm_vcpu *vcpu)
 {
        struct kvm_regs regs1, regs2;
        struct kvm_x86_state *state;
 
-       state = vcpu_save_state(vm, VCPU_ID);
+       state = vcpu_save_state(vm, vcpu->id);
        memset(&regs1, 0, sizeof(regs1));
-       vcpu_regs_get(vm, VCPU_ID, &regs1);
+       vcpu_regs_get(vm, vcpu->id, &regs1);
 
        kvm_vm_release(vm);
 
        /* Restore state in a new VM.  */
-       kvm_vm_restart(vm);
-       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);
+       vcpu = vm_recreate_with_one_vcpu(vm);
+       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(&regs2, 0, sizeof(regs2));
-       vcpu_regs_get(vm, VCPU_ID, &regs2);
+       vcpu_regs_get(vm, vcpu->id, &regs2);
        TEST_ASSERT(!memcmp(&regs1, &regs2, sizeof(regs2)),
                    "Unexpected register values after vcpu_load_state; rdi: %lx rsi: %lx",
                    (ulong) regs2.rdi, (ulong) regs2.rsi);
+       return vcpu;
 }
 
 int main(int argc, char *argv[])
 {
        vm_vaddr_t vmx_pages_gva = 0;
 
+       struct kvm_vcpu *vcpu;
        struct kvm_vm *vm;
        struct kvm_run *run;
        struct ucall uc;
        int stage;
 
-       /* Create VM */
-       vm = vm_create_default(VCPU_ID, 0, guest_code);
+       vm = vm_create_with_one_vcpu(&vcpu, guest_code);
 
        if (!nested_vmx_supported() ||
            !kvm_check_cap(KVM_CAP_NESTED_STATE) ||
@@ -216,28 +215,29 @@ int main(int argc, char *argv[])
                exit(KSFT_SKIP);
        }
 
-       vcpu_set_hv_cpuid(vm, VCPU_ID);
-       vcpu_enable_evmcs(vm, VCPU_ID);
+       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);
+       vcpu_args_set(vm, vcpu->id, 1, vmx_pages_gva);
 
        vm_init_descriptor_tables(vm);
-       vcpu_init_descriptor_tables(vm, VCPU_ID);
+       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);
+               run = vcpu->run;
+
+               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)) {
+               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]);
@@ -255,12 +255,12 @@ int main(int argc, char *argv[])
                            uc.args[1] == stage, "Stage %d: Unexpected register values vmexit, got %lx",
                            stage, (ulong)uc.args[1]);
 
-               save_restore_vm(vm);
+               vcpu = save_restore_vm(vm, vcpu);
 
                /* 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);
+                       inject_nmi(vcpu);
                }
 
                /*
@@ -270,7 +270,7 @@ int main(int argc, char *argv[])
                 */
                if (stage == 9) {
                        pr_info("Trying extra KVM_GET_NESTED_STATE/KVM_SET_NESTED_STATE cycle\n");
-                       save_restore_vm(vm);
+                       vcpu = save_restore_vm(vm, vcpu);
                }
        }