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qdev: add DEFINE_PROP_TPMBE 

A property to lookup a tpm backend.

Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Reviewed-by: Stefan Berger <stefanb@linux.vnet.ibm.com>
Signed-off-by: Stefan Berger <stefanb@linux.vnet.ibm.com>
This commit is contained in:
Marc-André Lureau 2017-11-06 19:39:23 +01:00 committed by Stefan Berger
parent 51a837e908
commit 493b783035
2 changed files with 67 additions and 0 deletions
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64
hw/core/qdev-properties-system.c
View File

@ -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)

3
include/hw/qdev-properties.h
View File

@ -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) \