qemu/tpm.c

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/*
* TPM configuration
*
* Copyright (C) 2011-2013 IBM Corporation
*
* Authors:
* Stefan Berger <stefanb@us.ibm.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.
*
* Based on net.c
*/
#include "qemu/osdep.h"
#include "qapi/qmp/qerror.h"
#include "sysemu/tpm_backend.h"
#include "sysemu/tpm.h"
#include "qemu/config-file.h"
#include "qemu/error-report.h"
#include "qmp-commands.h"
static QLIST_HEAD(, TPMBackend) tpm_backends =
QLIST_HEAD_INITIALIZER(tpm_backends);
static TPMDriverOps const *be_drivers[TPM_TYPE__MAX];
static bool tpm_models[TPM_MODEL__MAX];
void tpm_register_model(enum TpmModel model)
{
tpm_models[model] = true;
}
Add a TPM Passthrough backend driver implementation This patch is based of off version 9 of Stefan Berger's patch series "QEMU Trusted Platform Module (TPM) integration" and adds a new backend driver for it. This patch adds a passthrough backend driver for passing commands sent to the emulated TPM device directly to a TPM device opened on the host machine. Thus it is possible to use a hardware TPM device in a system running on QEMU, providing the ability to access a TPM in a special state (e.g. after a Trusted Boot). This functionality is being used in the acTvSM Trusted Virtualization Platform which is available on [1]. Usage example: qemu-system-x86_64 -tpmdev passthrough,id=tpm0,path=/dev/tpm0 \ -device tpm-tis,tpmdev=tpm0 \ -cdrom test.iso -boot d Some notes about the host TPM: The TPM needs to be enabled and activated. If that's not the case one has to go through the BIOS/UEFI and enable and activate that TPM for TPM commands to work as expected. It may be necessary to boot the kernel using tpm_tis.force=1 in the boot command line or 'modprobe tpm_tis force=1' in case of using it as a module. Regards, Andreas Niederl, Stefan Berger [1] http://trustedjava.sourceforge.net/ Signed-off-by: Andreas Niederl <andreas.niederl@iaik.tugraz.at> Signed-off-by: Stefan Berger <stefanb@linux.vnet.ibm.com> Reviewed-by: Corey Bryant <coreyb@linux.vnet.ibm.com> Reviewed-by: Joel Schopp <jschopp@linux.vnet.ibm.com> Message-id: 1361987275-26289-6-git-send-email-stefanb@linux.vnet.ibm.com Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2013-02-27 21:47:53 +04:00
const TPMDriverOps *tpm_get_backend_driver(const char *type)
{
int i = qapi_enum_parse(&TpmType_lookup, type, -1, NULL);
return i >= 0 ? be_drivers[i] : NULL;
}
#ifdef CONFIG_TPM
void tpm_register_driver(const TPMDriverOps *tdo)
{
assert(!be_drivers[tdo->type]);
be_drivers[tdo->type] = tdo;
}
/*
* Walk the list of available TPM backend drivers and display them on the
* screen.
*/
static void tpm_display_backend_drivers(void)
{
int i;
fprintf(stderr, "Supported TPM types (choose only one):\n");
for (i = 0; i < TPM_TYPE__MAX; i++) {
if (be_drivers[i] == NULL) {
continue;
}
fprintf(stderr, "%12s %s\n",
TpmType_str(i), be_drivers[i]->desc());
}
fprintf(stderr, "\n");
}
/*
* Find the TPM with the given Id
*/
TPMBackend *qemu_find_tpm(const char *id)
{
TPMBackend *drv;
if (id) {
QLIST_FOREACH(drv, &tpm_backends, list) {
if (!strcmp(drv->id, id)) {
return drv;
}
}
}
return NULL;
}
static int configure_tpm(QemuOpts *opts)
{
const char *value;
const char *id;
const TPMDriverOps *be;
TPMBackend *drv;
Error *local_err = NULL;
if (!QLIST_EMPTY(&tpm_backends)) {
error_report("Only one TPM is allowed.");
return 1;
}
id = qemu_opts_id(opts);
if (id == NULL) {
error_report(QERR_MISSING_PARAMETER, "id");
return 1;
}
value = qemu_opt_get(opts, "type");
if (!value) {
error_report(QERR_MISSING_PARAMETER, "type");
tpm_display_backend_drivers();
return 1;
}
be = tpm_get_backend_driver(value);
if (be == NULL) {
error_report(QERR_INVALID_PARAMETER_VALUE,
"type", "a TPM backend type");
tpm_display_backend_drivers();
return 1;
}
/* validate backend specific opts */
qemu_opts_validate(opts, be->opts, &local_err);
if (local_err) {
error_report_err(local_err);
return 1;
}
drv = be->create(opts, id);
if (!drv) {
return 1;
}
tpm_backend_open(drv, &local_err);
if (local_err) {
error_report_err(local_err);
return 1;
}
QLIST_INSERT_HEAD(&tpm_backends, drv, list);
return 0;
}
static int tpm_init_tpmdev(void *dummy, QemuOpts *opts, Error **errp)
{
return configure_tpm(opts);
}
/*
* Walk the list of TPM backend drivers that are in use and call their
* destroy function to have them cleaned up.
*/
void tpm_cleanup(void)
{
TPMBackend *drv, *next;
QLIST_FOREACH_SAFE(drv, &tpm_backends, list, next) {
QLIST_REMOVE(drv, list);
tpm_backend_destroy(drv);
}
}
/*
* Initialize the TPM. Process the tpmdev command line options describing the
* TPM backend.
*/
int tpm_init(void)
{
if (qemu_opts_foreach(qemu_find_opts("tpmdev"),
tpm_init_tpmdev, NULL, NULL)) {
return -1;
}
atexit(tpm_cleanup);
return 0;
}
/*
* Parse the TPM configuration options.
* To display all available TPM backends the user may use '-tpmdev help'
*/
int tpm_config_parse(QemuOptsList *opts_list, const char *optarg)
{
QemuOpts *opts;
if (!strcmp(optarg, "help")) {
tpm_display_backend_drivers();
return -1;
}
QemuOpts: Wean off qerror_report_err() qerror_report_err() is a transitional interface to help with converting existing monitor commands to QMP. It should not be used elsewhere. The only remaining user in qemu-option.c is qemu_opts_parse(). Is it used in QMP context? If not, we can simply replace qerror_report_err() by error_report_err(). The uses in qemu-img.c, qemu-io.c, qemu-nbd.c and under tests/ are clearly not in QMP context. The uses in vl.c aren't either, because the only QMP command handlers there are qmp_query_status() and qmp_query_machines(), and they don't call it. Remaining uses: * drive_def(): Command line -drive and such, HMP drive_add and pci_add * hmp_chardev_add(): HMP chardev-add * monitor_parse_command(): HMP core * tmp_config_parse(): Command line -tpmdev * net_host_device_add(): HMP host_net_add * net_client_parse(): Command line -net and -netdev * qemu_global_option(): Command line -global * vnc_parse_func(): Command line -display, -vnc, default display, HMP change, QMP change. Bummer. * qemu_pci_hot_add_nic(): HMP pci_add * usb_net_init(): Command line -usbdevice, HMP usb_add Propagate errors through qemu_opts_parse(). Create a convenience function qemu_opts_parse_noisily() that passes errors to error_report_err(). Switch all non-QMP users outside tests to it. That leaves vnc_parse_func(). Propagate errors through it. Since I'm touching it anyway, rename it to vnc_parse(). Signed-off-by: Markus Armbruster <armbru@redhat.com> Reviewed-by: Eric Blake <eblake@redhat.com> Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com> Reviewed-by: Luiz Capitulino <lcapitulino@redhat.com>
2015-02-13 14:50:26 +03:00
opts = qemu_opts_parse_noisily(opts_list, optarg, true);
if (!opts) {
return -1;
}
return 0;
}
#endif /* CONFIG_TPM */
static const TPMDriverOps *tpm_driver_find_by_type(enum TpmType type)
{
return be_drivers[type];
}
static TPMInfo *qmp_query_tpm_inst(TPMBackend *drv)
{
TPMInfo *res = g_new0(TPMInfo, 1);
TPMPassthroughOptions *tpo;
res->id = g_strdup(drv->id);
res->model = drv->fe_model;
res->options = g_new0(TpmTypeOptions, 1);
switch (drv->ops->type) {
case TPM_TYPE_PASSTHROUGH:
res->options->type = TPM_TYPE_OPTIONS_KIND_PASSTHROUGH;
tpo = g_new0(TPMPassthroughOptions, 1);
qapi: Don't special-case simple union wrappers Simple unions were carrying a special case that hid their 'data' QMP member from the resulting C struct, via the hack method QAPISchemaObjectTypeVariant.simple_union_type(). But by using the work we started by unboxing flat union and alternate branches, coupled with the ability to visit the members of an implicit type, we can now expose the simple union's implicit type in qapi-types.h: | struct q_obj_ImageInfoSpecificQCow2_wrapper { | ImageInfoSpecificQCow2 *data; | }; | | struct q_obj_ImageInfoSpecificVmdk_wrapper { | ImageInfoSpecificVmdk *data; | }; ... | struct ImageInfoSpecific { | ImageInfoSpecificKind type; | union { /* union tag is @type */ | void *data; |- ImageInfoSpecificQCow2 *qcow2; |- ImageInfoSpecificVmdk *vmdk; |+ q_obj_ImageInfoSpecificQCow2_wrapper qcow2; |+ q_obj_ImageInfoSpecificVmdk_wrapper vmdk; | } u; | }; Doing this removes asymmetry between QAPI's QMP side and its C side (both sides now expose 'data'), and means that the treatment of a simple union as sugar for a flat union is now equivalent in both languages (previously the two approaches used a different layer of dereferencing, where the simple union could be converted to a flat union with equivalent C layout but different {} on the wire, or to an equivalent QMP wire form but with different C representation). Using the implicit type also lets us get rid of the simple_union_type() hack. Of course, now all clients of simple unions have to adjust from using su->u.member to using su->u.member.data; while this touches a number of files in the tree, some earlier cleanup patches helped minimize the change to the initialization of a temporary variable rather than every single member access. The generated qapi-visit.c code is also affected by the layout change: |@@ -7393,10 +7393,10 @@ void visit_type_ImageInfoSpecific_member | } | switch (obj->type) { | case IMAGE_INFO_SPECIFIC_KIND_QCOW2: |- visit_type_ImageInfoSpecificQCow2(v, "data", &obj->u.qcow2, &err); |+ visit_type_q_obj_ImageInfoSpecificQCow2_wrapper_members(v, &obj->u.qcow2, &err); | break; | case IMAGE_INFO_SPECIFIC_KIND_VMDK: |- visit_type_ImageInfoSpecificVmdk(v, "data", &obj->u.vmdk, &err); |+ visit_type_q_obj_ImageInfoSpecificVmdk_wrapper_members(v, &obj->u.vmdk, &err); | break; | default: | abort(); Signed-off-by: Eric Blake <eblake@redhat.com> Message-Id: <1458254921-17042-13-git-send-email-eblake@redhat.com> Signed-off-by: Markus Armbruster <armbru@redhat.com>
2016-03-18 01:48:37 +03:00
res->options->u.passthrough.data = tpo;
if (drv->path) {
tpo->path = g_strdup(drv->path);
tpo->has_path = true;
}
if (drv->cancel_path) {
tpo->cancel_path = g_strdup(drv->cancel_path);
tpo->has_cancel_path = true;
}
break;
case TPM_TYPE__MAX:
break;
}
return res;
}
/*
* Walk the list of active TPM backends and collect information about them
* following the schema description in qapi-schema.json.
*/
TPMInfoList *qmp_query_tpm(Error **errp)
{
TPMBackend *drv;
TPMInfoList *info, *head = NULL, *cur_item = NULL;
QLIST_FOREACH(drv, &tpm_backends, list) {
if (!tpm_models[drv->fe_model]) {
continue;
}
info = g_new0(TPMInfoList, 1);
info->value = qmp_query_tpm_inst(drv);
if (!cur_item) {
head = cur_item = info;
} else {
cur_item->next = info;
cur_item = info;
}
}
return head;
}
TpmTypeList *qmp_query_tpm_types(Error **errp)
{
unsigned int i = 0;
TpmTypeList *head = NULL, *prev = NULL, *cur_item;
for (i = 0; i < TPM_TYPE__MAX; i++) {
if (!tpm_driver_find_by_type(i)) {
continue;
}
cur_item = g_new0(TpmTypeList, 1);
cur_item->value = i;
if (prev) {
prev->next = cur_item;
}
if (!head) {
head = cur_item;
}
prev = cur_item;
}
return head;
}
TpmModelList *qmp_query_tpm_models(Error **errp)
{
unsigned int i = 0;
TpmModelList *head = NULL, *prev = NULL, *cur_item;
for (i = 0; i < TPM_MODEL__MAX; i++) {
if (!tpm_models[i]) {
continue;
}
cur_item = g_new0(TpmModelList, 1);
cur_item->value = i;
if (prev) {
prev->next = cur_item;
}
if (!head) {
head = cur_item;
}
prev = cur_item;
}
return head;
}