Commit 493b7830 authored by Marc-André Lureau's avatar Marc-André Lureau Committed by Stefan Berger
Browse files

qdev: add DEFINE_PROP_TPMBE 



A property to lookup a tpm backend.

Signed-off-by: default avatarMarc-André Lureau <marcandre.lureau@redhat.com>
Reviewed-by: default avatarStefan Berger <stefanb@linux.vnet.ibm.com>
Signed-off-by: default avatarStefan Berger <stefanb@linux.vnet.ibm.com>
parent 51a837e9

hw/core/qdev-properties-system.c

+64 −0
Original line number Diff line number Diff line
@@ -21,6 +21,7 @@ 
#include "net/hub.h"

#include "qapi/visitor.h"

#include "chardev/char-fe.h"

#include "sysemu/tpm_backend.h"

#include "sysemu/iothread.h"



static void get_pointer(Object *obj, Visitor *v, Property *prop,
@@ -236,6 +237,69 @@ const PropertyInfo qdev_prop_chr = { 
    .release = release_chr,

};



/* --- character device --- */



static void get_tpm(Object *obj, Visitor *v, const char *name, void *opaque,

                    Error **errp)

{

    DeviceState *dev = DEVICE(obj);

    TPMBackend **be = qdev_get_prop_ptr(dev, opaque);

    char *p;



    p = g_strdup(*be ? (*be)->id : "");

    visit_type_str(v, name, &p, errp);

    g_free(p);

}



static void set_tpm(Object *obj, Visitor *v, const char *name, void *opaque,

                    Error **errp)

{

    DeviceState *dev = DEVICE(obj);

    Error *local_err = NULL;

    Property *prop = opaque;

    TPMBackend *s, **be = qdev_get_prop_ptr(dev, prop);

    char *str;



    if (dev->realized) {

        qdev_prop_set_after_realize(dev, name, errp);

        return;

    }



    visit_type_str(v, name, &str, &local_err);

    if (local_err) {

        error_propagate(errp, local_err);

        return;

    }



    s = qemu_find_tpm_be(str);

    if (s == NULL) {

        error_setg(errp, "Property '%s.%s' can't find value '%s'",

                   object_get_typename(obj), prop->name, str);

    } else if (tpm_backend_init(s, TPM_IF(obj), errp) == 0) {

        *be = s; /* weak reference, avoid cyclic ref */

    }

    g_free(str);

}



static void release_tpm(Object *obj, const char *name, void *opaque)

{

    DeviceState *dev = DEVICE(obj);

    Property *prop = opaque;

    TPMBackend **be = qdev_get_prop_ptr(dev, prop);



    if (*be) {

        tpm_backend_reset(*be);

    }

}



const PropertyInfo qdev_prop_tpm = {

    .name  = "str",

    .description = "ID of a tpm to use as a backend",

    .get   = get_tpm,

    .set   = set_tpm,

    .release = release_tpm,

};



/* --- netdev device --- */

static void get_netdev(Object *obj, Visitor *v, const char *name,

                       void *opaque, Error **errp)

include/hw/qdev-properties.h

+3 −0
Original line number Diff line number Diff line
@@ -17,6 +17,7 @@ extern const PropertyInfo qdev_prop_int64; 
extern const PropertyInfo qdev_prop_size;

extern const PropertyInfo qdev_prop_string;

extern const PropertyInfo qdev_prop_chr;

extern const PropertyInfo qdev_prop_tpm;

extern const PropertyInfo qdev_prop_ptr;

extern const PropertyInfo qdev_prop_macaddr;

extern const PropertyInfo qdev_prop_on_off_auto;
@@ -186,6 +187,8 @@ extern const PropertyInfo qdev_prop_link; 


#define DEFINE_PROP_CHR(_n, _s, _f)             \

    DEFINE_PROP(_n, _s, _f, qdev_prop_chr, CharBackend)

#define DEFINE_PROP_TPMBE(_n, _s, _f)                     \

    DEFINE_PROP(_n, _s, _f, qdev_prop_tpm, TPMBackend *)

#define DEFINE_PROP_STRING(_n, _s, _f)             \

    DEFINE_PROP(_n, _s, _f, qdev_prop_string, char*)

#define DEFINE_PROP_NETDEV(_n, _s, _f)             \