[PATCH v14 16/22] KVM: selftests: Load per-vCPU guest stack in TDX boot parameters

[Lisa Wang <wyihan@google.com>]

From: Sagi Shahar <sagis@google.com>

Allocate a guest stack for each vCPU and record the GVA in the TDX boot
parameters region to allow proper vCPU initialization.

Co-developed-by: Ackerley Tng <ackerleytng@google.com>
Signed-off-by: Ackerley Tng <ackerleytng@google.com>
Signed-off-by: Sagi Shahar <sagis@google.com>
Signed-off-by: Lisa Wang <wyihan@google.com>
Reviewed-by: Binbin Wu <binbin.wu@linux.intel.com>
---
 tools/testing/selftests/kvm/include/x86/tdx/tdx_util.h |  1 +
 tools/testing/selftests/kvm/lib/x86/processor.c        |  2 ++
 tools/testing/selftests/kvm/lib/x86/tdx/tdx_util.c     | 10 ++++++++++
 3 files changed, 13 insertions(+)

diff --git a/tools/testing/selftests/kvm/include/x86/tdx/tdx_util.h b/tools/testing/selftests/kvm/include/x86/tdx/tdx_util.h
index 07e7f5c90329..93ce6e1ad2c8 100644
--- a/tools/testing/selftests/kvm/include/x86/tdx/tdx_util.h
+++ b/tools/testing/selftests/kvm/include/x86/tdx/tdx_util.h
@@ -69,5 +69,6 @@ void tdx_init_vm(struct kvm_vm *vm, u64 attributes);
 void tdx_vm_setup_boot_code_region(struct kvm_vm *vm);
 void tdx_vm_setup_boot_parameters_region(struct kvm_vm *vm, u32 nr_runnable_vcpus);
 void tdx_vm_load_common_boot_parameters(struct kvm_vm *vm);
+void tdx_vcpu_load_boot_parameters(struct kvm_vm *vm, struct kvm_vcpu *vcpu);
 
 #endif /* SELFTESTS_TDX_TDX_UTIL_H */
diff --git a/tools/testing/selftests/kvm/lib/x86/processor.c b/tools/testing/selftests/kvm/lib/x86/processor.c
index f6a2aa6b86a4..5e415c6577b8 100644
--- a/tools/testing/selftests/kvm/lib/x86/processor.c
+++ b/tools/testing/selftests/kvm/lib/x86/processor.c
@@ -847,6 +847,8 @@ static void tdx_vcpu_init(struct kvm_vm *vm, struct kvm_vcpu *vcpu)
 	vcpu_init_cpuid(vcpu, cpuid);
 	free(cpuid);
 	tdx_vcpu_ioctl(vcpu, KVM_TDX_INIT_VCPU, 0, NULL);
+
+	tdx_vcpu_load_boot_parameters(vm, vcpu);
 }
 
 struct kvm_vcpu *vm_arch_vcpu_add(struct kvm_vm *vm, u32 vcpu_id)
diff --git a/tools/testing/selftests/kvm/lib/x86/tdx/tdx_util.c b/tools/testing/selftests/kvm/lib/x86/tdx/tdx_util.c
index 5bbe51ad0f66..3c3ac6c7ce40 100644
--- a/tools/testing/selftests/kvm/lib/x86/tdx/tdx_util.c
+++ b/tools/testing/selftests/kvm/lib/x86/tdx/tdx_util.c
@@ -104,6 +104,16 @@ void tdx_vm_load_common_boot_parameters(struct kvm_vm *vm)
 	TEST_ASSERT(params->idtr.base != 0, "idt base address should not be 0");
 }
 
+void tdx_vcpu_load_boot_parameters(struct kvm_vm *vm, struct kvm_vcpu *vcpu)
+{
+	struct td_boot_parameters *params =
+		addr_gpa2hva(vm, TD_BOOT_PARAMETERS_GPA);
+	struct td_per_vcpu_parameters *vcpu_params =
+		&params->per_vcpu[vcpu->id];
+
+	vcpu_params->esp_gva = kvm_allocate_vcpu_stack(vm);
+}
+
 static struct kvm_tdx_capabilities *tdx_read_capabilities(struct kvm_vm *vm)
 {
 	static struct kvm_tdx_capabilities *tdx_cap;

-- 
2.55.0.229.g6434b31f56-goog