On 17/03/21 08:44, Emanuele Giuseppe Esposito wrote:
+ printf("vcpu executing...\n");
+ vcpu_run(vm, vcpuid);
+ printf("vcpu executed\n");
+
+ switch (get_ucall(vm, vcpuid, &uc)) {
+ case UCALL_SYNC:
+ printf("stage %d sync %ld\n", stage, uc.args[1]);
+ TEST_ASSERT(!strcmp((const char *)uc.args[0], "hello") &&
+ uc.args[1] == stage + 1,
+ "Stage %d: Unexpected register values vmexit, got
%lx",
+ stage + 1, (ulong)uc.args[1]);
+ return;
+ case UCALL_DONE:
+ printf("got done\n");
You can remove the printfs here.
+ return;
+ case UCALL_ABORT:
+ TEST_ASSERT(false, "%s at %s:%ld\n\tvalues: %#lx, %#lx", (const
char *)uc.args[0],
+ __FILE__, uc.args[1], uc.args[2], uc.args[3]);
+ default:
+ TEST_ASSERT(false, "Unexpected exit: %s",
+ exit_reason_str(vcpu_state(vm,
vcpuid)->exit_reason));
+ }
+}
+
+static void add_x86_vcpu(struct kvm_vm *vm, uint32_t vcpuid, void *code)
+{
+ vm_vcpu_add_default(vm, vcpuid, code);
+ vcpu_set_cpuid(vm, vcpuid, kvm_get_supported_cpuid());
+}
+
+static void run_vm_bsp(uint32_t bsp_vcpu)
+{
+ struct kvm_vm *vm;
+ int stage;
+ void *vcpu0_code, *vcpu1_code;
+
+ vm = create_vm();
+
+ vcpu0_code = guest_bsp_vcpu;
+ vcpu1_code = guest_not_bsp_vcpu;
+
+ if (bsp_vcpu == VCPU_ID1) {
+ vcpu0_code = guest_not_bsp_vcpu;
+ vcpu1_code = guest_bsp_vcpu;
+
+ vm_ioctl(vm, KVM_SET_BOOT_CPU_ID, (void *) VCPU_ID1);
+ }
+
+ add_x86_vcpu(vm, VCPU_ID0, vcpu0_code);
+ add_x86_vcpu(vm, VCPU_ID1, vcpu1_code);
+
+ for (stage = 0; stage < 2; stage++) {
+ run_vcpu(vm, VCPU_ID0, stage);
+ run_vcpu(vm, VCPU_ID1, stage);
+ }
These are just stylistic nits, but:
1) you could pass a bool to add_x86_vcpu, like
add_x86_vcpu(vm, VCPU_ID0, bsp_vcpu == VCPU_ID0);
add_x86_vcpu(vm, VCPU_ID1, bsp_vcpu == VCPU_ID1);
instead of having the vcpu0_code and vcpu1_code pointers.
2) you could move the for loop inside run_vcpu. This way you can assert
that you get UCALL_DONE when stage == 2.
+ kvm_vm_free(vm);
+}
+
+int main(int argc, char *argv[])
+{
+ if (!kvm_check_cap(KVM_CAP_SET_BOOT_CPU_ID)) {
+ print_skip("set_boot_cpu_id not available");
+ return 0;
+ }
+
+ run_vm_bsp(VCPU_ID0);
+ run_vm_bsp(VCPU_ID1);
+ run_vm_bsp(VCPU_ID0);
Looks good! Just another small change: since this third test is not
adding much, you could instead invoke KVM_SET_BOOT_CPU_ID(VCPU_ID1)
*after* the creation of the vCPUs instead of before. This should fail
with -EBUSY, and vcpu 0 will remain the BSP.
Paolo
