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

xen_devconfig.c (3934B)

      1#include "qemu/osdep.h"
      2#include "hw/xen/xen-legacy-backend.h"
      3#include "qemu/option.h"
      4#include "sysemu/blockdev.h"
      5#include "sysemu/sysemu.h"
      6
      7/* ------------------------------------------------------------- */
      8
      9static int xen_config_dev_dirs(const char *ftype, const char *btype, int vdev,
     10                               char *fe, char *be, int len)
     11{
     12    char *dom;
     13
     14    dom = xs_get_domain_path(xenstore, xen_domid);
     15    snprintf(fe, len, "%s/device/%s/%d", dom, ftype, vdev);
     16    free(dom);
     17
     18    dom = xs_get_domain_path(xenstore, 0);
     19    snprintf(be, len, "%s/backend/%s/%d/%d", dom, btype, xen_domid, vdev);
     20    free(dom);
     21
     22    xenstore_mkdir(fe, XS_PERM_READ | XS_PERM_WRITE);
     23    xenstore_mkdir(be, XS_PERM_READ);
     24    return 0;
     25}
     26
     27static int xen_config_dev_all(char *fe, char *be)
     28{
     29    /* frontend */
     30    if (xen_protocol)
     31        xenstore_write_str(fe, "protocol", xen_protocol);
     32
     33    xenstore_write_int(fe, "state",           XenbusStateInitialising);
     34    xenstore_write_int(fe, "backend-id",      0);
     35    xenstore_write_str(fe, "backend",         be);
     36
     37    /* backend */
     38    xenstore_write_str(be, "domain",          qemu_name ? qemu_name : "no-name");
     39    xenstore_write_int(be, "online",          1);
     40    xenstore_write_int(be, "state",           XenbusStateInitialising);
     41    xenstore_write_int(be, "frontend-id",     xen_domid);
     42    xenstore_write_str(be, "frontend",        fe);
     43
     44    return 0;
     45}
     46
     47/* ------------------------------------------------------------- */
     48
     49int xen_config_dev_blk(DriveInfo *disk)
     50{
     51    char fe[256], be[256], device_name[32];
     52    int vdev = 202 * 256 + 16 * disk->unit;
     53    int cdrom = disk->media_cd;
     54    const char *devtype = cdrom ? "cdrom" : "disk";
     55    const char *mode    = cdrom ? "r"     : "w";
     56    const char *filename = qemu_opt_get(disk->opts, "file");
     57
     58    snprintf(device_name, sizeof(device_name), "xvd%c", 'a' + disk->unit);
     59    xen_pv_printf(NULL, 1, "config disk %d [%s]: %s\n",
     60                  disk->unit, device_name, filename);
     61    xen_config_dev_dirs("vbd", "qdisk", vdev, fe, be, sizeof(fe));
     62
     63    /* frontend */
     64    xenstore_write_int(fe, "virtual-device",  vdev);
     65    xenstore_write_str(fe, "device-type",     devtype);
     66
     67    /* backend */
     68    xenstore_write_str(be, "dev",             device_name);
     69    xenstore_write_str(be, "type",            "file");
     70    xenstore_write_str(be, "params",          filename);
     71    xenstore_write_str(be, "mode",            mode);
     72
     73    /* common stuff */
     74    return xen_config_dev_all(fe, be);
     75}
     76
     77int xen_config_dev_nic(NICInfo *nic)
     78{
     79    char fe[256], be[256];
     80    char mac[20];
     81    int vlan_id = -1;
     82
     83    net_hub_id_for_client(nic->netdev, &vlan_id);
     84    snprintf(mac, sizeof(mac), "%02x:%02x:%02x:%02x:%02x:%02x",
     85             nic->macaddr.a[0], nic->macaddr.a[1], nic->macaddr.a[2],
     86             nic->macaddr.a[3], nic->macaddr.a[4], nic->macaddr.a[5]);
     87    xen_pv_printf(NULL, 1, "config nic %d: mac=\"%s\"\n", vlan_id, mac);
     88    xen_config_dev_dirs("vif", "qnic", vlan_id, fe, be, sizeof(fe));
     89
     90    /* frontend */
     91    xenstore_write_int(fe, "handle",     vlan_id);
     92    xenstore_write_str(fe, "mac",        mac);
     93
     94    /* backend */
     95    xenstore_write_int(be, "handle",     vlan_id);
     96    xenstore_write_str(be, "mac",        mac);
     97
     98    /* common stuff */
     99    return xen_config_dev_all(fe, be);
    100}
    101
    102int xen_config_dev_vfb(int vdev, const char *type)
    103{
    104    char fe[256], be[256];
    105
    106    xen_config_dev_dirs("vfb", "vfb", vdev, fe, be, sizeof(fe));
    107
    108    /* backend */
    109    xenstore_write_str(be, "type",  type);
    110
    111    /* common stuff */
    112    return xen_config_dev_all(fe, be);
    113}
    114
    115int xen_config_dev_vkbd(int vdev)
    116{
    117    char fe[256], be[256];
    118
    119    xen_config_dev_dirs("vkbd", "vkbd", vdev, fe, be, sizeof(fe));
    120    return xen_config_dev_all(fe, be);
    121}
    122
    123int xen_config_dev_console(int vdev)
    124{
    125    char fe[256], be[256];
    126
    127    xen_config_dev_dirs("console", "console", vdev, fe, be, sizeof(fe));
    128    return xen_config_dev_all(fe, be);
    129}