KVM: selftests: Convert state_test away from VCPU_ID

Convert state_test to use vm_create_with_one_vcpu() and
vm_recreate_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/state_test.c b/tools/testing/selftests/kvm/x86_64/state_test.c
index 41f7faa..b7869ef 100644 (file)
--- a/tools/testing/selftests/kvm/x86_64/state_test.c
+++ b/tools/testing/selftests/kvm/x86_64/state_test.c
@@ -20,7 +20,6 @@
 #include "vmx.h"
 #include "svm_util.h"
 
-#define VCPU_ID                5
 #define L2_GUEST_STACK_SIZE 256
 
 void svm_l2_guest_code(void)
@@ -157,6 +156,7 @@ int main(int argc, char *argv[])
        vm_vaddr_t nested_gva = 0;
 
        struct kvm_regs regs1, regs2;
+       struct kvm_vcpu *vcpu;
        struct kvm_vm *vm;
        struct kvm_run *run;
        struct kvm_x86_state *state;
@@ -164,10 +164,10 @@ int main(int argc, char *argv[])
        int stage;
 
        /* Create VM */
-       vm = vm_create_default(VCPU_ID, 0, guest_code);
-       run = vcpu_state(vm, VCPU_ID);
+       vm = vm_create_with_one_vcpu(&vcpu, guest_code);
+       run = vcpu->run;
 
-       vcpu_regs_get(vm, VCPU_ID, &regs1);
+       vcpu_regs_get(vm, vcpu->id, &regs1);
 
        if (kvm_check_cap(KVM_CAP_NESTED_STATE)) {
                if (nested_svm_supported())
@@ -179,16 +179,16 @@ int main(int argc, char *argv[])
        if (!nested_gva)
                pr_info("will skip nested state checks\n");
 
-       vcpu_args_set(vm, VCPU_ID, 1, nested_gva);
+       vcpu_args_set(vm, vcpu->id, 1, nested_gva);
 
        for (stage = 1;; stage++) {
-               _vcpu_run(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)) {
+               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]);
@@ -206,22 +206,21 @@ int main(int argc, char *argv[])
                            uc.args[1] == stage, "Stage %d: Unexpected register values vmexit, got %lx",
                            stage, (ulong)uc.args[1]);
 
-               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_cpuid(vm, VCPU_ID, kvm_get_supported_cpuid());
-               vcpu_load_state(vm, VCPU_ID, state);
-               run = vcpu_state(vm, VCPU_ID);
+               vcpu = vm_recreate_with_one_vcpu(vm);
+               vcpu_set_cpuid(vm, vcpu->id, kvm_get_supported_cpuid());
+               vcpu_load_state(vm, vcpu->id, state);
+               run = vcpu->run;
                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);