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2018-02-09Drop superfluous includes of qapi/qmp/qerror.hMarkus Armbruster
Reviewed-by: Eric Blake <eblake@redhat.com> Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org> Signed-off-by: Markus Armbruster <armbru@redhat.com> Message-Id: <20180201111846.21846-6-armbru@redhat.com>
2018-02-09Drop superfluous includes of qapi-types.h and test-qapi-types.hMarkus Armbruster
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>
2018-02-07Add memfd based hostmemMarc-André Lureau
Add a new memory backend, similar to hostmem-file, except that it doesn't need to create files. It also enforces memory sealing. This backend is mainly useful for sharing the memory with other processes. Note that Linux supports transparent huge-pages of shmem/memfd memory since 4.8. It is relatively easier to set up THP than a dedicate hugepage mount point by using "madvise" in /sys/kernel/mm/transparent_hugepage/shmem_enabled. Since 4.14, memfd allows to set hugetlb requirement explicitly. Pending for merge in 4.16 is memfd sealing support for hugetlb backed memory. Usage: -object memory-backend-memfd,id=mem1,size=1G Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com> Message-Id: <20180201132757.23063-5-marcandre.lureau@redhat.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2018-01-29tpm: report backend request errorMarc-André Lureau
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 Lureau
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>
2018-01-19hostmem-file: add "align" optionHaozhong Zhang
When mmap(2) the backend files, QEMU uses the host page size (getpagesize(2)) by default as the alignment of mapping address. However, some backends may require alignments different than the page size. For example, mmap a device DAX (e.g., /dev/dax0.0) on Linux kernel 4.13 to an address, which is 4K-aligned but not 2M-aligned, fails with a kernel message like [617494.969768] dax dax0.0: qemu-system-x86: dax_mmap: fail, unaligned vma (0x7fa37c579000 - 0x7fa43c579000, 0x1fffff) Because there is no common approach to get such alignment requirement, we add the 'align' option to 'memory-backend-file', so that users or management utils, which have enough knowledge about the backend, can specify a proper alignment via this option. Signed-off-by: Haozhong Zhang <haozhong.zhang@intel.com> Message-Id: <20171211072806.2812-2-haozhong.zhang@intel.com> Reviewed-by: Michael S. Tsirkin <mst@redhat.com> Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com> [ehabkost: fixed typo, fixed error_setg() format string] Signed-off-by: Eduardo Habkost <ehabkost@redhat.com>
2017-12-14tpm: tpm_emulator: get and set buffer size of deviceStefan Berger
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 Berger
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-be: update optional function pointersMarc-André Lureau
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 Lureau
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 Lureau
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 Lureau
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 Lureau
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 Lureau
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>
2017-12-14tpm: move TpmIf in include/sysemu/tpm.hMarc-André Lureau
This is a better location than hw/tpm, since we are going to use the interface from outside hw/tpm. 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 Lureau
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 a QOM TPM interfaceMarc-André Lureau
This will simplify backend / interface objects relationship, so the frontend interface will simply have to implement the TPM QOM 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 Lureau
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 unused TPMBackendCmdMarc-André Lureau
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 Lureau
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 Lureau
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>
2017-10-13tpm-backend: Move realloc_buffer() implementation to tpm-tis modelAmarnath Valluri
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 Valluri
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 Valluri
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 Valluri
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 Valluri
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>
2017-09-19hostmem-file: Add "discard-data" optionEduardo Habkost
The new option can be used to indicate that the file contents can be destroyed and don't need to be flushed to disk when QEMU exits or when the memory backend object is removed. Internally, it will trigger a madvise(MADV_REMOVE) call when the memory backend is removed. Signed-off-by: Eduardo Habkost <ehabkost@redhat.com> Message-Id: <20170824192315.5897-4-ehabkost@redhat.com> [ehabkost: fixup: improved documentation] Reviewed-by: Daniel P. Berrange <berrange@redhat.com> Tested-by: Zack Cornelius <zack.cornelius@kove.net> Signed-off-by: Eduardo Habkost <ehabkost@redhat.com>
2017-09-04Merge remote-tracking branch 'remotes/armbru/tags/pull-qapi-2017-09-01-v3' ↵Peter Maydell
into staging QAPI patches for 2017-09-01 # gpg: Signature made Mon 04 Sep 2017 12:30:31 BST # gpg: using RSA key 0x3870B400EB918653 # gpg: Good signature from "Markus Armbruster <armbru@redhat.com>" # gpg: aka "Markus Armbruster <armbru@pond.sub.org>" # Primary key fingerprint: 354B C8B3 D7EB 2A6B 6867 4E5F 3870 B400 EB91 8653 * remotes/armbru/tags/pull-qapi-2017-09-01-v3: (47 commits) qapi: drop the sentinel in enum array qapi: Change data type of the FOO_lookup generated for enum FOO qapi: Convert indirect uses of FOO_lookup[...] to qapi_enum_lookup() qapi: Mechanically convert FOO_lookup[...] to FOO_str(...) qapi: Generate FOO_str() macro for QAPI enum FOO qapi: Avoid unnecessary use of enum lookup table's sentinel qapi: Use qapi_enum_parse() in input_type_enum() crypto: Use qapi_enum_parse() in qcrypto_block_luks_name_lookup() quorum: Use qapi_enum_parse() in quorum_open() block: Use qemu_enum_parse() in blkdebug_debug_breakpoint() hmp: Use qapi_enum_parse() in hmp_migrate_set_parameter() hmp: Use qapi_enum_parse() in hmp_migrate_set_capability() tpm: Clean up model registration & lookup tpm: Clean up driver registration & lookup qapi: Drop superfluous qapi_enum_parse() parameter max qapi: Update qapi-code-gen.txt examples to match current code qapi-schema: Improve section headings qapi-schema: Move queries from common.json to qapi-schema.json qapi-schema: Make block-core.json self-contained qapi-schema: Fold event.json back into qapi-schema.json ... Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
2017-09-04qapi: Change data type of the FOO_lookup generated for enum FOOMarc-André Lureau
Currently, a FOO_lookup is an array of strings terminated by a NULL sentinel. A future patch will generate enums with "holes". NULL-termination will cease to work then. To prepare for that, store the length in the FOO_lookup by wrapping it in a struct and adding a member for the length. The sentinel will be dropped next. Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com> Message-Id: <20170822132255.23945-13-marcandre.lureau@redhat.com> [Basically redone] Signed-off-by: Markus Armbruster <armbru@redhat.com> Message-Id: <1503564371-26090-16-git-send-email-armbru@redhat.com> [Rebased]
2017-09-04qapi: Mechanically convert FOO_lookup[...] to FOO_str(...)Markus Armbruster
Signed-off-by: Markus Armbruster <armbru@redhat.com> Message-Id: <1503564371-26090-14-git-send-email-armbru@redhat.com> Reviewed-by: Marc-André Lureau <marcandre.lureau@redhat.com>
2017-09-01qom: Remove unused errp parameter from can_be_deleted()Eduardo Habkost
The errp argument is ignored by all implementations of the method, and user_creatable_del() would break if any implementation set an error (because it calls error_setg(errp) if the function returns false). Remove the unused parameter. Signed-off-by: Eduardo Habkost <ehabkost@redhat.com> Message-Id: <20170829220337.23427-1-ehabkost@redhat.com> Reviewed-by: Gonglei <arei.gonglei@huawei.com> Reviewed-by: Igor Mammedov <imammedo@redhat.com> Signed-off-by: Eduardo Habkost <ehabkost@redhat.com>
2017-07-14memory: Rename memory_region_init_ram() to memory_region_init_ram_nomigrate()Peter Maydell
Rename memory_region_init_ram() to memory_region_init_ram_nomigrate(). This leaves the way clear for us to provide a memory_region_init_ram() which does handle migration. Signed-off-by: Peter Maydell <peter.maydell@linaro.org> Reviewed-by: Paolo Bonzini <pbonzini@redhat.com> Message-id: 1499438577-7674-4-git-send-email-peter.maydell@linaro.org
2017-07-14char: add backend hotswap handlerAnton Nefedov
Frontends should have an interface to setup the handler of a backend change. The interface will be used in the next commits Signed-off-by: Anton Nefedov <anton.nefedov@virtuozzo.com> Reviewed-by: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com> Reviewed-by: Marc-André Lureau <marcandre.lureau@redhat.com> Message-Id: <1499342940-56739-3-git-send-email-anton.nefedov@virtuozzo.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2017-07-11backends: remove empty trace-events fileDaniel P. Berrange
The content of the backends/trace-events file was entirely removed in commit 6b10e573d15ef82dbc5c5b3726028e6642e134f6 Author: Marc-André Lureau <marcandre.lureau@redhat.com> Date: Mon May 29 12:39:42 2017 +0400 char: move char devices to chardev/ Leaving the empty file around, causes tracetool to generate an empty .dtrace file which makes the dtrace compiler throw a syntax error. Signed-off-by: Daniel P. Berrange <berrange@redhat.com> Reviewed-by: Eric Blake <eblake@redhat.com> Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org> Message-id: 20170629162046.4135-1-berrange@redhat.com Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
2017-06-20object: use more specific property type namesMarc-André Lureau
Use the actual unsigned integer type name. The type name change impacts the following externally visible area: * vl.c's machine_help_func() puts it in help for -machine NAME,help. * QMP command qom-list exposes it in ObjectPropertyInfo member @type. * QMP command device-list-properties exposes it in DevicePropertyInfo member @type. Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com> Reviewed-by: Markus Armbruster <armbru@redhat.com> Message-Id: <20170607163635.17635-15-marcandre.lureau@redhat.com> Signed-off-by: Markus Armbruster <armbru@redhat.com>
2017-06-02char: move char devices to chardev/Marc-André Lureau
Suggested by Paolo Bonzini during series review. Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com> Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
2017-06-02char: make chr_fe_deinit() optionaly delete backendMarc-André Lureau
This simplifies removing a backend for a frontend user (no need to retrieve the associated driver and separate delete call etc). NB: many frontends have questionable handling of ending a chardev. They should probably delete the backend to prevent broken reusage. Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com> Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
2017-06-02char: move CharBackend handling in char-fe unitMarc-André Lureau
Move all the frontend struct and methods to a seperate unit. This avoids accidentally mixing backend and frontend calls, and helps with readabilty. Make qemu_chr_replay() a macro shared by both char and char-fe. Export qemu_chr_write(), and use a macro for qemu_chr_write_all() (nb: yes, CharBackend is for char frontend :) Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com> Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
2017-06-02chardev: serial & parallel declaration to own headersMarc-André Lureau
Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com> Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
2017-06-02chardev: move headers to include/chardevMarc-André Lureau
So they are all in one place. The following patch will move serial & parallel declarations to the respective headers. Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com> Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
2017-04-20hostmem: use host_memory_backend_mr_inited() where properPeter Xu
Use the new interface to boost readability. Signed-off-by: Peter Xu <peterx@redhat.com> Message-Id: <1489151370-15453-3-git-send-email-peterx@redhat.com> Reviewed-by: Eduardo Habkost <ehabkost@redhat.com> Signed-off-by: Eduardo Habkost <ehabkost@redhat.com>
2017-04-20hostmem: introduce host_memory_backend_mr_inited()Peter Xu
We were checking this against memory region size of host memory backend's mr field to see whether the mr has been inited. This is efficient but less elegant. Let's make a helper for it to avoid confusions, along with some notes. Suggested-by: Peter Maydell <peter.maydell@linaro.org> Signed-off-by: Peter Xu <peterx@redhat.com> Message-Id: <1489151370-15453-2-git-send-email-peterx@redhat.com> Reviewed-by: Eduardo Habkost <ehabkost@redhat.com> Signed-off-by: Eduardo Habkost <ehabkost@redhat.com>
2017-03-23Merge remote-tracking branch 'remotes/gonglei/tags/cryptodev-next-20170323' ↵Peter Maydell
into staging cryptodev fixes # gpg: Signature made Thu 23 Mar 2017 09:22:44 GMT # gpg: using RSA key 0x2ED7FDE9063C864D # gpg: Good signature from "Gonglei <arei.gonglei@huawei.com>" # gpg: WARNING: This key is not certified with a trusted signature! # gpg: There is no indication that the signature belongs to the owner. # Primary key fingerprint: 3EF1 8E53 3459 E6D1 963A 3C05 2ED7 FDE9 063C 864D * remotes/gonglei/tags/cryptodev-next-20170323: cryptodev: fix asserting single queue cryptodev: setiv only when really need Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
2017-03-23cryptodev: fix asserting single queueHalil Pasic
We already check for queues == 1 in cryptodev_builtin_init and when that is not true raise an error. But before that error is reported the assertion in cryptodev_builtin_cleanup kicks in (because object is being finalized and freed). Let's remove assert(queues == 1) form cryptodev_builtin_cleanup as it does only harm and no good. Reported-by: Boris Fiuczynski <fiuczy@linux.vnet.ibm.com> Signed-off-by: Halil Pasic <pasic@linux.vnet.ibm.com> Reviewed-by: Eric Blake <eblake@redhat.com> Signed-off-by: Gonglei <arei.gonglei@huawei.com>
2017-03-23cryptodev: setiv only when really needLongpeng(Mike)
ECB mode cipher doesn't need IV, if we setiv for it then qemu crypto API would report "Expected IV size 0 not **", so we should setiv only when the cipher algos really need. Signed-off-by: Longpeng(Mike) <longpeng2@huawei.com> Signed-off-by: Gonglei <arei.gonglei@huawei.com>
2017-03-21Revert "hostmem: fix QEMU crash by 'info memdev'"Markus Armbruster
This reverts commit 1454d33f0507cb54d62ed80f494884157c9e7130. The string input visitor regression fixed in the previous commit made visit_type_uint16List() fail on empty input. query_memdev() calls it via object_property_get_uint16List(). Because it doesn't expect it to fail, it passes &error_abort, and duly crashes. Commit 1454d33 "fixes" this crash by making host_memory_backend_get_host_nodes() return a list containing just MAX_NODES instead of the empty list. Papers over the regression, and leads to bogus "info memdev" output, as shown below; revert. I suspect that if we had bisected the crash back then, we would have found and fixed the actual bug instead of papering over it. To reproduce, run HMP command "info memdev" with $ qemu-system-x86_64 --nodefaults -S -display none -monitor stdio -object memory-backend-ram,id=mem1,size=4k With this commit, "info memdev" prints memory backend: mem1 size: 4096 merge: true dump: true prealloc: false policy: default host nodes: exactly like before commit 74f24cb. Between commit 1454d33 and this commit, it prints memory backend: mem1 size: 4096 merge: true dump: true prealloc: false policy: default host nodes: 128 The last line is bogus. Between commit 74f24cb and 1454d33, it crashes like this: Unexpected error in parse_str() at /work/armbru/tmp/qemu/qapi/string-input-visitor.c:126: Parameter 'null' expects an int64 value or range Aborted (core dumped) Cc: Xiao Guangrong <guangrong.xiao@linux.intel.com> Cc: Paolo Bonzini <pbonzini@redhat.com> Signed-off-by: Markus Armbruster <armbru@redhat.com> Message-Id: <1490026424-11330-3-git-send-email-armbru@redhat.com> Reviewed-by: Michael Roth <mdroth@linux.vnet.ibm.com> Reviewed-by: Eric Blake <eblake@redhat.com>
2017-03-14mem-prealloc: reduce large guest start-up and migration time.Jitendra Kolhe
Using "-mem-prealloc" option for a large guest leads to higher guest start-up and migration time. This is because with "-mem-prealloc" option qemu tries to map every guest page (create address translations), and make sure the pages are available during runtime. virsh/libvirt by default, seems to use "-mem-prealloc" option in case the guest is configured to use huge pages. The patch tries to map all guest pages simultaneously by spawning multiple threads. Currently limiting the change to QEMU library functions on POSIX compliant host only, as we are not sure if the problem exists on win32. Below are some stats with "-mem-prealloc" option for guest configured to use huge pages. ------------------------------------------------------------------------ Idle Guest | Start-up time | Migration time ------------------------------------------------------------------------ Guest stats with 2M HugePage usage - single threaded (existing code) ------------------------------------------------------------------------ 64 Core - 4TB | 54m11.796s | 75m43.843s 64 Core - 1TB | 8m56.576s | 14m29.049s 64 Core - 256GB | 2m11.245s | 3m26.598s ------------------------------------------------------------------------ Guest stats with 2M HugePage usage - map guest pages using 8 threads ------------------------------------------------------------------------ 64 Core - 4TB | 5m1.027s | 34m10.565s 64 Core - 1TB | 1m10.366s | 8m28.188s 64 Core - 256GB | 0m19.040s | 2m10.148s ----------------------------------------------------------------------- Guest stats with 2M HugePage usage - map guest pages using 16 threads ----------------------------------------------------------------------- 64 Core - 4TB | 1m58.970s | 31m43.400s 64 Core - 1TB | 0m39.885s | 7m55.289s 64 Core - 256GB | 0m11.960s | 2m0.135s ----------------------------------------------------------------------- Changed in v2: - modify number of memset threads spawned to min(smp_cpus, 16). - removed 64GB memory restriction for spawning memset threads. Changed in v3: - limit number of threads spawned based on min(sysconf(_SC_NPROCESSORS_ONLN), 16, smp_cpus) - implement memset thread specific siglongjmp in SIGBUS signal_handler. Changed in v4 - remove sigsetjmp/siglongjmp and SIGBUS unblock/block for main thread as main thread no longer touches any pages. - simplify code my returning memset_thread_failed status from touch_all_pages. Signed-off-by: Jitendra Kolhe <jitendra.kolhe@hpe.com> Message-Id: <1487907103-32350-1-git-send-email-jitendra.kolhe@hpe.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2017-02-20Add wctablet deviceAnatoli Huseu1
Add QEMU Wacom Penpartner serial tablet emulation. GSoC 2016 project. Signed-off-by: Anatoli Huseu1 <avg.tolik@gmail.com> Various cleanups. Add line speed tracking. Implement ST and SP commands. Adapted to chardev QOMification. Signed-off-by: Gerd Hoffmann <kraxel@redhat.com> Message-id: 1486391007-10116-1-git-send-email-kraxel@redhat.com
2017-01-31char: remove class kind fieldMarc-André Lureau
The class kind is necessary to lookup the chardev name in qmp_chardev_add() after calling qemu_chr_new_from_opts() and to set the appropriate ChardevBackend (mainly to free the right fields). qemu_chr_new_from_opts() can be changed to use a non-qmp function using the chardev class typename. Introduce qemu_chardev_add() to be called from qemu_chr_new_from_opts() and remove the class chardev kind field. Set the backend->type in the parse callback (when non-common fields are added). Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com> Reviewed-by: Eric Blake <eblake@redhat.com>
2017-01-31char: get rid of CharDriverMarc-André Lureau
qemu_chr_new_from_opts() is modified to not need CharDriver backend[] array, but uses instead objectified qmp_query_chardev_backends() and char_get_class(). The alias field is moved outside in a ChardevAlias[], similar to QDevAlias for devices. "kind" and "parse" are moved to ChardevClass ("kind" is to be removed next) Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com> Reviewed-by: Eric Blake <eblake@redhat.com>
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