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2023-09-08include/: spelling fixesMichael Tokarev1-1/+1
Signed-off-by: Michael Tokarev <mjt@tls.msk.ru> Reviewed-by: Alex Bennée <alex.bennee@linaro.org>
2021-06-15sysemu: Make TPM structures inaccessible if CONFIG_TPM is not definedStefan Berger1-1/+5
Signed-off-by: Stefan Berger <stefanb@linux.ibm.com> Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com> Tested-by: Philippe Mathieu-Daudé <philmd@redhat.com> Message-Id: <20210614191335.1968807-5-stefanb@linux.ibm.com> [PMD: Remove tpm_init() / tpm_cleanup() stubs] Signed-off-by: Philippe Mathieu-Daudé <philmd@redhat.com>
2020-09-18qom: Remove module_obj_name parameter from OBJECT_DECLARE* macrosEduardo Habkost1-1/+1
One of the goals of having less boilerplate on QOM declarations is to avoid human error. Requiring an extra argument that is never used is an opportunity for mistakes. Remove the unused argument from OBJECT_DECLARE_TYPE and OBJECT_DECLARE_SIMPLE_TYPE. Coccinelle patch used to convert all users of the macros: @@ declarer name OBJECT_DECLARE_TYPE; identifier InstanceType, ClassType, lowercase, UPPERCASE; @@ OBJECT_DECLARE_TYPE(InstanceType, ClassType, - lowercase, UPPERCASE); @@ declarer name OBJECT_DECLARE_SIMPLE_TYPE; identifier InstanceType, lowercase, UPPERCASE; @@ OBJECT_DECLARE_SIMPLE_TYPE(InstanceType, - lowercase, UPPERCASE); Signed-off-by: Eduardo Habkost <ehabkost@redhat.com> Reviewed-by: Cédric Le Goater <clg@kaod.org> Acked-by: Cornelia Huck <cohuck@redhat.com> Acked-by: Igor Mammedov <imammedo@redhat.com> Acked-by: Paul Durrant <paul@xen.org> Acked-by: Thomas Huth <thuth@redhat.com> Message-Id: <20200916182519.415636-4-ehabkost@redhat.com> Signed-off-by: Eduardo Habkost <ehabkost@redhat.com>
2020-09-09Use OBJECT_DECLARE_TYPE where possibleEduardo Habkost1-4/+2
Replace DECLARE_OBJ_CHECKERS with OBJECT_DECLARE_TYPE where the typedefs can be safely removed. Generated running: $ ./scripts/codeconverter/converter.py -i \ --pattern=DeclareObjCheckers $(git grep -l '' -- '*.[ch]') Reviewed-by: Daniel P. Berrangé <berrange@redhat.com> Message-Id: <20200831210740.126168-16-ehabkost@redhat.com> Message-Id: <20200831210740.126168-17-ehabkost@redhat.com> Message-Id: <20200831210740.126168-18-ehabkost@redhat.com> Signed-off-by: Eduardo Habkost <ehabkost@redhat.com>
2020-09-09Use DECLARE_*CHECKER* macrosEduardo Habkost1-6/+2
Generated using: $ ./scripts/codeconverter/converter.py -i \ --pattern=TypeCheckMacro $(git grep -l '' -- '*.[ch]') Reviewed-by: Daniel P. Berrangé <berrange@redhat.com> Reviewed-by: Juan Quintela <quintela@redhat.com> Message-Id: <20200831210740.126168-12-ehabkost@redhat.com> Reviewed-by: Juan Quintela <quintela@redhat.com> Message-Id: <20200831210740.126168-13-ehabkost@redhat.com> Message-Id: <20200831210740.126168-14-ehabkost@redhat.com> Signed-off-by: Eduardo Habkost <ehabkost@redhat.com>
2020-09-09Move QOM typedefs and add missing includesEduardo Habkost1-2/+2
Some typedefs and macros are defined after the type check macros. This makes it difficult to automatically replace their definitions with OBJECT_DECLARE_TYPE. Patch generated using: $ ./scripts/codeconverter/converter.py -i \ --pattern=QOMStructTypedefSplit $(git grep -l '' -- '*.[ch]') which will split "typdef struct { ... } TypedefName" declarations. Followed by: $ ./scripts/codeconverter/converter.py -i --pattern=MoveSymbols \ $(git grep -l '' -- '*.[ch]') which will: - move the typedefs and #defines above the type check macros - add missing #include "qom/object.h" lines if necessary Reviewed-by: Daniel P. Berrangé <berrange@redhat.com> Reviewed-by: Juan Quintela <quintela@redhat.com> Message-Id: <20200831210740.126168-9-ehabkost@redhat.com> Reviewed-by: Juan Quintela <quintela@redhat.com> Message-Id: <20200831210740.126168-10-ehabkost@redhat.com> Message-Id: <20200831210740.126168-11-ehabkost@redhat.com> Signed-off-by: Eduardo Habkost <ehabkost@redhat.com>
2019-06-12Include qemu-common.h exactly where neededMarkus Armbruster1-1/+0
No header includes qemu-common.h after this commit, as prescribed by qemu-common.h's file comment. Signed-off-by: Markus Armbruster <armbru@redhat.com> Message-Id: <20190523143508.25387-5-armbru@redhat.com> [Rebased with conflicts resolved automatically, except for include/hw/arm/xlnx-zynqmp.h hw/arm/nrf51_soc.c hw/arm/msf2-soc.c block/qcow2-refcount.c block/qcow2-cluster.c block/qcow2-cache.c target/arm/cpu.h target/lm32/cpu.h target/m68k/cpu.h target/mips/cpu.h target/moxie/cpu.h target/nios2/cpu.h target/openrisc/cpu.h target/riscv/cpu.h target/tilegx/cpu.h target/tricore/cpu.h target/unicore32/cpu.h target/xtensa/cpu.h; bsd-user/main.c and net/tap-bsd.c fixed up]
2018-02-09Drop superfluous includes of qapi-types.h and test-qapi-types.hMarkus Armbruster1-1/+0
Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org> Reviewed-by: Eric Blake <eblake@redhat.com> Signed-off-by: Markus Armbruster <armbru@redhat.com> Message-Id: <20180201111846.21846-4-armbru@redhat.com>
2018-01-29tpm: report backend request errorMarc-André Lureau1-1/+2
Use an Error** for request to let the caller handle error reporting. This will also allow to inform the frontend of a backend error. 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>
2018-01-29tpm: replace GThreadPool with AIO threadpoolMarc-André Lureau1-2/+10
The TPM backend uses a GThreadPool to handle IO in a seperate thread. However, GThreadPool isn't integrated with Qemu main loops, making it unnecessarily complicated to deal with. Qemu has a AIO threadpool, that is better integrated with loops and various IO functions, provides completion BH by default etc. Remove the only user of GThreadPool from qemu, use AIO threadpool. Note that the backend: - no longer accepts queing multiple requests (unneeded so far) - increase ref to itself when handling a command, for extra safety - tpm_backend_thread_end() is renamed tpm_backend_finish_sync() and will wait for completion of BH (request_completed), which will help migration handling. 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>
2017-12-14tpm: tpm_emulator: get and set buffer size of deviceStefan Berger1-2/+4
Convert the tpm_emulator backend to get the current buffer size of the external device and set it to the buffer size that the frontend (TIS) requests. Signed-off-by: Stefan Berger <stefanb@linux.vnet.ibm.com> Reviewed-by: Marc-André Lureau <marcandre.lureau@redhat.com>
2017-12-14tpm: Move getting TPM buffer size to backendsStefan Berger1-0/+12
Rather than setting the size of the TPM buffer in the front-end, query the backend for the size of the buffer. In this patch we just move the hard-coded buffer size of 4096 to the backends. Signed-off-by: Stefan Berger <stefanb@linux.vnet.ibm.com> Reviewed-by: Marc-André Lureau <marcandre.lureau@redhat.com>
2017-12-14tpm: remove tpm_register_model()Marc-André Lureau1-2/+0
Query object classes that implements TPMIf instead. 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>
2017-12-14tpm: rename qemu_find_tpm() -> qemu_find_tpm_be()Marc-André Lureau1-1/+1
find_tpm() will be introduced to lookup the TPM device. 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>
2017-12-14tpm-backend: move set 'id' to common codeMarc-André Lureau1-1/+1
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>
2017-12-14tpm-be: update optional function pointersMarc-André Lureau1-1/+4
QEMU code doesn't generally have assert() for mandatory callbacks/function pointers, probably because the crash is pretty obvious. Document the methods instead of going into the code. Make get_tpm_options() mandatory to implement (since all backend implementation have it). 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>
2017-12-14tpm: remove unused opened codeMarc-André Lureau1-12/+0
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>
2017-12-14tpm-be: ask model to the TPM interfaceMarc-André Lureau1-1/+0
No need to store the mode in the backend, or to let the frontend set it itself. 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>
2017-12-14tpm-be: report error instead of front-endMarc-André Lureau1-1/+2
Backend can give more accurate error description, and lift out the job from the frontend. 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>
2017-12-14tpm-be: call request_completed() out of threadMarc-André Lureau1-0/+1
Lift from the backend implementation the responsability to call the request_completed() callback outside of thread context. This also simplify frontend/interface work, as they no longer need to care whether the callback is called from a different thread. 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>
2017-12-14tpm-backend: store TPMIf interface, improve backend_init()Marc-André Lureau1-3/+3
Store the TPM interface, the actual object may be different from TPMState. Keep a reference on the interface, and check the backend wasn't already initialized. 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>
2017-10-19tpm: move recv_data_callback to TPM interfaceMarc-André Lureau1-5/+1
Simplify the TPM backend setup, move callback to TPM interface. 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>
2017-10-19tpm: add TPMBackendCmd to hold the request stateMarc-André Lureau1-3/+13
This simplifies a bit locality handling, and argument passing, and could pave the way to queuing requests (if that makes sense). 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>
2017-10-19tpm: remove locty argument from receive_cbMarc-André Lureau1-1/+1
The tpm_state is passed as argument, the assert() is pointless since we give it the value of tpm_state->locty_number already. 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>
2017-10-19tpm: remove unused TPMBackendCmdMarc-André Lureau1-8/+1
There is only handling of request so far in both backends. 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>
2017-10-19tpm: remove init() class methodMarc-André Lureau1-2/+0
No backend use it. 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>
2017-10-19tpm: remove TPMDriverOpsMarc-André Lureau1-10/+5
Use TPMBackendClass to hold class methods/fields. 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>
2017-10-19tpm: move TPMSizedBuffer to tpm_tis.hMarc-André Lureau1-5/+0
Close to where it's being used. 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>
2017-10-19tpm: remove tpm_register_driver()Marc-André Lureau1-1/+0
No more users of be_drivers[], drop that too. 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>
2017-10-19tpm: make tpm_get_backend_driver() staticMarc-André Lureau1-1/+0
No need to export the function. 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>
2017-10-13tpm-backend: Move realloc_buffer() implementation to tpm-tis modelAmarnath Valluri1-12/+0
buffer reallocation is very unlikely to be backend specific. Hence move inside the tis. Signed-off-by: Amarnath Valluri <amarnath.valluri@intel.com> Reviewed-by: Stefan Berger <stefanb@linux.vnet.ibm.com> Reviewed-by: Marc-André Lureau <marcandre.lureau@redhat.com> Signed-off-by: Stefan Berger <stefanb@linux.vnet.ibm.com>
2017-10-13tpm-backend: Add new API to read backend TpmInfoAmarnath Valluri1-2/+13
TPM configuration options are backend implementation details and shall not be part of base TPMBackend object, and these shall not be accessed directly outside of the class, hence added a new interface method, get_tpm_options() to TPMDriverOps., which shall be implemented by the derived classes to return configured tpm options. A new tpm backend api - tpm_backend_query_tpm() which uses _get_tpm_options() to prepare TpmInfo. Signed-off-by: Amarnath Valluri <amarnath.valluri@intel.com> Reviewed-by: Stefan Berger <stefanb@linux.vnet.ibm.com> Reviewed-by: Marc-André Lureau <marcandre.lureau@redhat.com> Signed-off-by: Stefan Berger <stefanb@linux.vnet.ibm.com>
2017-10-13tpm-backend: Made few interface methods optionalAmarnath Valluri1-11/+2
This allows backend implementations left optional interface methods. For mandatory methods assertion checks added. Took the opportunity to remove unused methods: - tpm_backend_get_desc() - TPMDriverOps->handle_startup_error Signed-off-by: Amarnath Valluri <amarnath.valluri@intel.com> Reviewed-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>
2017-10-13tpm-backend: Initialize and free data members in it's own methodsAmarnath Valluri1-7/+0
Initialize and free TPMBackend data members in it's own instance_init() and instance_finalize methods. Took the opportunity to remove unneeded destroy() method from TpmDriverOps interface as TPMBackend is a Qemu Object, we can use object_unref() inplace of tpm_backend_destroy() to free the backend object, hence removed destroy() from TPMDriverOps interface. Signed-off-by: Amarnath Valluri <amarnath.valluri@intel.com> Reviewed-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>
2017-10-13tpm-backend: Move thread handling inside TPMBackendAmarnath Valluri1-12/+20
Move thread handling inside TPMBackend, this way backend implementations need not to maintain their own thread life cycle, instead they needs to implement 'handle_request()' class method that always been called from a thread. This change made tpm_backend_int.h kind of useless, hence removed it. Signed-off-by: Amarnath Valluri <amarnath.valluri@intel.com> Reviewed-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>
2017-10-13tpm-backend: Remove unneeded member variable from backend classAmarnath Valluri1-1/+0
TPMDriverOps inside TPMBackend is not required, as it is supposed to be a class member. The only possible reason for keeping in TPMBackend was, to get the backend type in tpm.c where dedicated backend api, tpm_backend_get_type() is present. Signed-off-by: Amarnath Valluri <amarnath.valluri@intel.com> Reviewed-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>
2017-09-04tpm: Clean up model registration & lookupMarkus Armbruster1-1/+1
We have a strict separation between enum TpmModel and tpm_models[]: * TpmModel may have any number of members. It just happens to have one. * tpm_register_model() uses the first empty slot in tpm_models[]. If you register more than tpm_models[] has space, tpn_register_model() fails. Its caller silently ignores the failure. Register the same TpmModel more than once has no effect other than wasting tpm_models[] slots: tpm_model_is_registered() is happy with the first one it finds. Since we only ever register one model, and tpm_models[] has space for just that one, this contraption even works. Turn tpm_models[] into a straight map from enum TpmType to bool. Much simpler. Cc: Stefan Berger <stefanb@us.ibm.com> Signed-off-by: Markus Armbruster <armbru@redhat.com> Message-Id: <1503564371-26090-5-git-send-email-armbru@redhat.com> Reviewed-by: Marc-André Lureau <marcandre.lureau@redhat.com> [Commit message typo fixed]
2017-09-04tpm: Clean up driver registration & lookupMarc-André Lureau1-1/+1
We have a strict separation between enum TpmType and be_drivers[]: * TpmType may have any number of members. It just happens to have one. * tpm_register_driver() uses the first empty slot in be_drivers[]. If you register more than tpm_models[] has space, tpm_register_driver() fails. Its caller silently ignores the failure. If you register more than one with a given TpmType, tpm_display_backend_drivers() will shows all of them, but tpm_driver_find_by_type() and tpm_get_backend_driver() will find only the one one that registered first. Since we only ever register one driver, and be_drivers[] has space for just that one, this contraption even works. Turn be_drivers[] into a straight map from enum TpmType to driver. Much simpler, and has a decent chance to actually work should we ever acquire additional drivers. While there, use qapi_enum_parse() in tpm_get_backend_driver(). Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com> Message-Id: <20170822132255.23945-8-marcandre.lureau@redhat.com> Reviewed-by: Markus Armbruster <armbru@redhat.com> [Rebased, superfluous initializer dropped, commit message rewritten] Cc: Stefan Berger <stefanb@us.ibm.com> Signed-off-by: Markus Armbruster <armbru@redhat.com> Message-Id: <1503564371-26090-4-git-send-email-armbru@redhat.com>
2016-07-12Clean up header guards that don't match their file nameMarkus Armbruster1-2/+2
Header guard symbols should match their file name to make guard collisions less likely. Offenders found with scripts/clean-header-guards.pl -vn. Cleaned up with scripts/clean-header-guards.pl, followed by some renaming of new guard symbols picked by the script to better ones. Signed-off-by: Markus Armbruster <armbru@redhat.com> Reviewed-by: Richard Henderson <rth@twiddle.net>
2016-02-23include: Clean up includesPeter Maydell1-1/+0
Clean up includes so that osdep.h is included first and headers which it implies are not included manually. This commit was created with scripts/clean-includes. NB: If this commit breaks compilation for your out-of-tree patchseries or fork, then you need to make sure you add #include "qemu/osdep.h" to any new .c files that you have. Signed-off-by: Peter Maydell <peter.maydell@linaro.org> Reviewed-by: Eric Blake <eblake@redhat.com>
2015-05-31Extend TPM TIS interface to support TPM 2Stefan Berger1-0/+23
Following the recent upgrade to version 1.3, extend the TPM TIS interface with capabilities introduced for support of a TPM 2. TPM TIS for TPM 2 introduced the following extensions beyond the TPM TIS 1.3 (used for TPM 1.2): - A new 32bit interface Id register was introduced. - New flags for the status (STS) register were defined. - New flags for the capability flags were defined. Support the above if a TPM TIS 1.3 for TPM 2 is used with a TPM 2 on the backend side. Support the old TPM TIS 1.3 configuration if a TPM 1.2 is being used. A subsequent patch will then determine which TPM version is being used in the backend. Signed-off-by: Stefan Berger <stefanb@linux.vnet.ibm.com> Reviewed-by: Michael S. Tsirkin <mst@redhat.com> Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
2015-03-01tpm: Support for TIS selftest done flagStefan Berger1-1/+1
Extend the backend to check whether the TPM_ContinueSelfTest finished successfully and provide a flag to the TIS front-end if it successfully finished. The TIS then sets a flag in all localities in the STS register and keeps it until the next reset. Signed-off-by: Stefan Berger <stefanb@linux.vnet.ibm.com> Acked-by: Michael S. Tsirkin <mst@redhat.com> Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
2013-04-23Move TPM passthrough specific command line options to backend structureStefan Berger1-0/+1
Move the TPM passthrough specific command line options to the passthrough backend implementation and attach them to the backend's interface structure. Add code to tpm.c for validating the TPM command line options. Signed-off-by: Stefan Berger <stefanb@linux.vnet.ibm.com> Reviewed-by: Corey Bryan <coreyb@linux.vnet.ibm.com> Message-id: 1366641699-21420-1-git-send-email-stefanb@linux.vnet.ibm.com Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2013-04-15sysemu: avoid proliferation of include/ subdirectoriesPaolo Bonzini1-0/+209
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>