xref: /qemu/target/i386/kvm/tdx.c (revision 631a2ac5a4beab740b342367550562cd659b4c4a)

/*
 * QEMU TDX support
 *
 * Copyright (c) 2025 Intel Corporation
 *
 * Author:
 *      Xiaoyao Li <xiaoyao.li@intel.com>
 *
 * SPDX-License-Identifier: GPL-2.0-or-later
 */

#include "qemu/osdep.h"
#include "qom/object_interfaces.h"

#include "hw/i386/x86.h"
#include "kvm_i386.h"
#include "tdx.h"

static int tdx_kvm_init(ConfidentialGuestSupport *cgs, Error **errp)
{
    kvm_mark_guest_state_protected();

    return 0;
}

static int tdx_kvm_type(X86ConfidentialGuest *cg)
{
    /* Do the object check */
    TDX_GUEST(cg);

    return KVM_X86_TDX_VM;
}

/* tdx guest */
OBJECT_DEFINE_TYPE_WITH_INTERFACES(TdxGuest,
                                   tdx_guest,
                                   TDX_GUEST,
                                   X86_CONFIDENTIAL_GUEST,
                                   { TYPE_USER_CREATABLE },
                                   { NULL })

static void tdx_guest_init(Object *obj)
{
    ConfidentialGuestSupport *cgs = CONFIDENTIAL_GUEST_SUPPORT(obj);
    TdxGuest *tdx = TDX_GUEST(obj);

    cgs->require_guest_memfd = true;
    tdx->attributes = 0;

    object_property_add_uint64_ptr(obj, "attributes", &tdx->attributes,
                                   OBJ_PROP_FLAG_READWRITE);
}

static void tdx_guest_finalize(Object *obj)
{
}

static void tdx_guest_class_init(ObjectClass *oc, const void *data)
{
    ConfidentialGuestSupportClass *klass = CONFIDENTIAL_GUEST_SUPPORT_CLASS(oc);
    X86ConfidentialGuestClass *x86_klass = X86_CONFIDENTIAL_GUEST_CLASS(oc);

    klass->kvm_init = tdx_kvm_init;
    x86_klass->kvm_type = tdx_kvm_type;
}