cachepc-qemu

Fork of AMDESE/qemu with changes for cachepc side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-qemu
Log | Files | Refs | Submodules | LICENSE | sfeed.txt

qdev-fw.c (2398B)

      1/*
      2 *  qdev fw helpers
      3 *
      4 *  This program is free software; you can redistribute it and/or modify
      5 *  it under the terms of the GNU General Public License as published by
      6 *  the Free Software Foundation; either version 2 of the License,
      7 *  or (at your option) any later version.
      8 *
      9 *  This program is distributed in the hope that it will be useful,
     10 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
     11 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
     12 *  GNU General Public License for more details.
     13 *
     14 *  You should have received a copy of the GNU General Public License
     15 *  along with this program; if not, see <http://www.gnu.org/licenses/>.
     16 */
     17
     18#include "qemu/osdep.h"
     19#include "hw/fw-path-provider.h"
     20#include "hw/qdev-core.h"
     21
     22const char *qdev_fw_name(DeviceState *dev)
     23{
     24    DeviceClass *dc = DEVICE_GET_CLASS(dev);
     25
     26    if (dc->fw_name) {
     27        return dc->fw_name;
     28    }
     29
     30    return object_get_typename(OBJECT(dev));
     31}
     32
     33static char *bus_get_fw_dev_path(BusState *bus, DeviceState *dev)
     34{
     35    BusClass *bc = BUS_GET_CLASS(bus);
     36
     37    if (bc->get_fw_dev_path) {
     38        return bc->get_fw_dev_path(dev);
     39    }
     40
     41    return NULL;
     42}
     43
     44static char *qdev_get_fw_dev_path_from_handler(BusState *bus, DeviceState *dev)
     45{
     46    Object *obj = OBJECT(dev);
     47    char *d = NULL;
     48
     49    while (!d && obj->parent) {
     50        obj = obj->parent;
     51        d = fw_path_provider_try_get_dev_path(obj, bus, dev);
     52    }
     53    return d;
     54}
     55
     56char *qdev_get_own_fw_dev_path_from_handler(BusState *bus, DeviceState *dev)
     57{
     58    Object *obj = OBJECT(dev);
     59
     60    return fw_path_provider_try_get_dev_path(obj, bus, dev);
     61}
     62
     63static int qdev_get_fw_dev_path_helper(DeviceState *dev, char *p, int size)
     64{
     65    int l = 0;
     66
     67    if (dev && dev->parent_bus) {
     68        char *d;
     69        l = qdev_get_fw_dev_path_helper(dev->parent_bus->parent, p, size);
     70        d = qdev_get_fw_dev_path_from_handler(dev->parent_bus, dev);
     71        if (!d) {
     72            d = bus_get_fw_dev_path(dev->parent_bus, dev);
     73        }
     74        if (d) {
     75            l += snprintf(p + l, size - l, "%s", d);
     76            g_free(d);
     77        } else {
     78            return l;
     79        }
     80    }
     81    l += snprintf(p + l , size - l, "/");
     82
     83    return l;
     84}
     85
     86char *qdev_get_fw_dev_path(DeviceState *dev)
     87{
     88    char path[128];
     89    int l;
     90
     91    l = qdev_get_fw_dev_path_helper(dev, path, 128);
     92
     93    path[l - 1] = '\0';
     94
     95    return g_strdup(path);
     96}