qemu/target/i386/sev.c

/*
 * QEMU SEV support
 *
 * Copyright Advanced Micro Devices 2016-2018
 *
 * Author:
 *      Brijesh Singh <brijesh.singh@amd.com>
 *
 * This work is licensed under the terms of the GNU GPL, version 2 or later.
 * See the COPYING file in the top-level directory.
 *
 */

#include "qemu/osdep.h"
#include "qapi/error.h"
#include "qom/object_interfaces.h"
#include "qemu/base64.h"
#include "sysemu/kvm.h"
#include "sev_i386.h"
#include "sysemu/sysemu.h"

#define DEFAULT_GUEST_POLICY    0x1 /* disable debug */
#define DEFAULT_SEV_DEVICE      "/dev/sev"

static void
qsev_guest_finalize(Object *obj)
{
}

static char *
qsev_guest_get_session_file(Object *obj, Error **errp)
{
    QSevGuestInfo *s = QSEV_GUEST_INFO(obj);

    return s->session_file ? g_strdup(s->session_file) : NULL;
}

static void
qsev_guest_set_session_file(Object *obj, const char *value, Error **errp)
{
    QSevGuestInfo *s = QSEV_GUEST_INFO(obj);

    s->session_file = g_strdup(value);
}

static char *
qsev_guest_get_dh_cert_file(Object *obj, Error **errp)
{
    QSevGuestInfo *s = QSEV_GUEST_INFO(obj);

    return g_strdup(s->dh_cert_file);
}

static void
qsev_guest_set_dh_cert_file(Object *obj, const char *value, Error **errp)
{
    QSevGuestInfo *s = QSEV_GUEST_INFO(obj);

    s->dh_cert_file = g_strdup(value);
}

static char *
qsev_guest_get_sev_device(Object *obj, Error **errp)
{
    QSevGuestInfo *sev = QSEV_GUEST_INFO(obj);

    return g_strdup(sev->sev_device);
}

static void
qsev_guest_set_sev_device(Object *obj, const char *value, Error **errp)
{
    QSevGuestInfo *sev = QSEV_GUEST_INFO(obj);

    sev->sev_device = g_strdup(value);
}

static void
qsev_guest_class_init(ObjectClass *oc, void *data)
{
    object_class_property_add_str(oc, "sev-device",
                                  qsev_guest_get_sev_device,
                                  qsev_guest_set_sev_device,
                                  NULL);
    object_class_property_set_description(oc, "sev-device",
            "SEV device to use", NULL);
    object_class_property_add_str(oc, "dh-cert-file",
                                  qsev_guest_get_dh_cert_file,
                                  qsev_guest_set_dh_cert_file,
                                  NULL);
    object_class_property_set_description(oc, "dh-cert-file",
            "guest owners DH certificate (encoded with base64)", NULL);
    object_class_property_add_str(oc, "session-file",
                                  qsev_guest_get_session_file,
                                  qsev_guest_set_session_file,
                                  NULL);
    object_class_property_set_description(oc, "session-file",
            "guest owners session parameters (encoded with base64)", NULL);
}

static void
qsev_guest_set_handle(Object *obj, Visitor *v, const char *name,
                      void *opaque, Error **errp)
{
    QSevGuestInfo *sev = QSEV_GUEST_INFO(obj);
    uint32_t value;

    visit_type_uint32(v, name, &value, errp);
    sev->handle = value;
}

static void
qsev_guest_set_policy(Object *obj, Visitor *v, const char *name,
                      void *opaque, Error **errp)
{
    QSevGuestInfo *sev = QSEV_GUEST_INFO(obj);
    uint32_t value;

    visit_type_uint32(v, name, &value, errp);
    sev->policy = value;
}

static void
qsev_guest_set_cbitpos(Object *obj, Visitor *v, const char *name,
                       void *opaque, Error **errp)
{
    QSevGuestInfo *sev = QSEV_GUEST_INFO(obj);
    uint32_t value;

    visit_type_uint32(v, name, &value, errp);
    sev->cbitpos = value;
}

static void
qsev_guest_set_reduced_phys_bits(Object *obj, Visitor *v, const char *name,
                                   void *opaque, Error **errp)
{
    QSevGuestInfo *sev = QSEV_GUEST_INFO(obj);
    uint32_t value;

    visit_type_uint32(v, name, &value, errp);
    sev->reduced_phys_bits = value;
}

static void
qsev_guest_get_policy(Object *obj, Visitor *v, const char *name,
                      void *opaque, Error **errp)
{
    uint32_t value;
    QSevGuestInfo *sev = QSEV_GUEST_INFO(obj);

    value = sev->policy;
    visit_type_uint32(v, name, &value, errp);
}

static void
qsev_guest_get_handle(Object *obj, Visitor *v, const char *name,
                      void *opaque, Error **errp)
{
    uint32_t value;
    QSevGuestInfo *sev = QSEV_GUEST_INFO(obj);

    value = sev->handle;
    visit_type_uint32(v, name, &value, errp);
}

static void
qsev_guest_get_cbitpos(Object *obj, Visitor *v, const char *name,
                       void *opaque, Error **errp)
{
    uint32_t value;
    QSevGuestInfo *sev = QSEV_GUEST_INFO(obj);

    value = sev->cbitpos;
    visit_type_uint32(v, name, &value, errp);
}

static void
qsev_guest_get_reduced_phys_bits(Object *obj, Visitor *v, const char *name,
                                   void *opaque, Error **errp)
{
    uint32_t value;
    QSevGuestInfo *sev = QSEV_GUEST_INFO(obj);

    value = sev->reduced_phys_bits;
    visit_type_uint32(v, name, &value, errp);
}

static void
qsev_guest_init(Object *obj)
{
    QSevGuestInfo *sev = QSEV_GUEST_INFO(obj);

    sev->sev_device = g_strdup(DEFAULT_SEV_DEVICE);
    sev->policy = DEFAULT_GUEST_POLICY;
    object_property_add(obj, "policy", "uint32", qsev_guest_get_policy,
                        qsev_guest_set_policy, NULL, NULL, NULL);
    object_property_add(obj, "handle", "uint32", qsev_guest_get_handle,
                        qsev_guest_set_handle, NULL, NULL, NULL);
    object_property_add(obj, "cbitpos", "uint32", qsev_guest_get_cbitpos,
                        qsev_guest_set_cbitpos, NULL, NULL, NULL);
    object_property_add(obj, "reduced-phys-bits", "uint32",
                        qsev_guest_get_reduced_phys_bits,
                        qsev_guest_set_reduced_phys_bits, NULL, NULL, NULL);
}

/* sev guest info */
static const TypeInfo qsev_guest_info = {
    .parent = TYPE_OBJECT,
    .name = TYPE_QSEV_GUEST_INFO,
    .instance_size = sizeof(QSevGuestInfo),
    .instance_finalize = qsev_guest_finalize,
    .class_size = sizeof(QSevGuestInfoClass),
    .class_init = qsev_guest_class_init,
    .instance_init = qsev_guest_init,
    .interfaces = (InterfaceInfo[]) {
        { TYPE_USER_CREATABLE },
        { }
    }
};

static void
sev_register_types(void)
{
    type_register_static(&qsev_guest_info);
}

type_init(sev_register_types);