add CONFIG_VM0_DESC support

if defined CONFIG_VM0_DESC, HV will use predefined vm0_desc to config
VM0, otherwise, HV will run VM0 with all physical cpus.

Signed-off-by: Jason Chen CJ <jason.cj.chen@intel.com>
Acked-by: Eddie Dong <eddie.dong@intel.com>

hypervisor/arch/x86/guest/vm.c

@@ -29,6 +29,7 @@ static void init_vm(struct vm_description *vm_desc,
 		struct vm *vm_handle)
 {
 	/* Populate VM attributes from VM description */
+#ifdef CONFIG_VM0_DESC
 	if (is_vm0(vm_handle)) {
 		/* Allocate all cpus to vm0 at the beginning */
 		vm_handle->hw.num_vcpus = phys_cpu_num;
@@ -37,6 +38,9 @@ static void init_vm(struct vm_description *vm_desc,
 		vm_handle->hw.num_vcpus = vm_desc->vm_hw_num_cores;
 		vm_handle->hw.exp_num_vcpus = vm_desc->vm_hw_num_cores;
 	}
+#else
+	vm_handle->hw.num_vcpus = vm_desc->vm_hw_num_cores;
+#endif
 }
 
 /* return a pointer to the virtual machine structure associated with
@@ -339,6 +343,10 @@ int prepare_vm0(void)
 	struct vm *vm = NULL;
 	struct vm_description *vm_desc = &vm0_desc;
 
+#ifndef CONFIG_VM0_DESC
+	vm_desc->vm_hw_num_cores = phys_cpu_num;
+#endif
+
 	err = create_vm(vm_desc, &vm);
 	if (err != 0) {
 		return err;
@@ -360,6 +368,7 @@ int prepare_vm0(void)
 	return err;
 }
 
+#ifdef CONFIG_VM0_DESC
 static inline bool vcpu_in_vm_desc(struct vcpu *vcpu,
 		struct vm_description *vm_desc)
 {
@@ -404,3 +413,4 @@ void vm_fixup(struct vm *vm)
 		vm->hw.num_vcpus = vm->hw.exp_num_vcpus;
 	}
 }
+#endif

hypervisor/arch/x86/guest/vmcall.c

@@ -39,10 +39,12 @@ int vmcall_vmexit_handler(struct vcpu *vcpu)
 	/* Dispatch the hypercall handler */
 	switch (hypcall_id) {
 	case HC_GET_API_VERSION:
+#ifdef CONFIG_VM0_DESC
 		/* vm0 will call HC_GET_API_VERSION as first hypercall, fixup
 		 * vm0 vcpu here.
 		 */
 		vm_fixup(vm);
+#endif
 		ret = hcall_get_api_version(vm, param1);
 		break;
 

hypervisor/bsp/sbl/vm_description.c

@@ -6,6 +6,8 @@
 
 #include <hypervisor.h>
 
+#ifdef CONFIG_VM0_DESC
+
 /* Number of CPUs in VM0 */
 #define VM0_NUM_CPUS    1
 
@@ -16,3 +18,9 @@ struct vm_description vm0_desc = {
 	.vm_hw_num_cores = VM0_NUM_CPUS,
 	.vm_pcpu_ids = &VM0_CPUS[0],
 };
+
+#else
+
+struct vm_description vm0_desc;
+
+#endif // CONFIG_VM0_DESC

hypervisor/bsp/uefi/vm_description.c

@@ -6,6 +6,8 @@
 
 #include <hypervisor.h>
 
+#ifdef CONFIG_VM0_DESC
+
 /* Number of CPUs in VM0 */
 #define VM0_NUM_CPUS    1
 
@@ -16,3 +18,9 @@ struct vm_description vm0_desc = {
 	.vm_hw_num_cores = VM0_NUM_CPUS,
 	.vm_pcpu_ids = &VM0_CPUS[0],
 };
+
+#else
+
+struct vm_description vm0_desc;
+
+#endif // CONFIG_VM0_DESC

hypervisor/common/hv_main.c

@@ -104,7 +104,11 @@ void vcpu_thread(struct vcpu *vcpu)
 
 static bool is_vm0_bsp(uint16_t pcpu_id)
 {
+#ifdef CONFIG_VM0_DESC
 	return pcpu_id == vm0_desc.vm_pcpu_ids[0];
+#else
+	return pcpu_id == BOOT_CPU_ID;
+#endif
 }
 
 int32_t hv_main(uint16_t pcpu_id)

hypervisor/include/arch/x86/guest/vm.h

@@ -175,7 +175,9 @@ void resume_vm_from_s3(struct vm *vm, uint32_t wakeup_vec);
 int start_vm(struct vm *vm);
 int create_vm(struct vm_description *vm_desc, struct vm **vm);
 int prepare_vm0(void);
+#ifdef CONFIG_VM0_DESC
 void vm_fixup(struct vm *vm);
+#endif
 
 struct vm *get_vm_from_vmid(uint16_t vm_id);