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2015-02-23numa: Rename set_numa_modes() to numa_post_machine_init()Eduardo Habkost1-1/+1
This function does some initialization that needs to be done after machine init. The function may be eventually removed if we move the CPUState.numa_node initialization to the CPU init code, but while the function exists, lets give it a name that makes sense. Reviewed-by: Paolo Bonzini <pbonzini@redhat.com> Acked-by: Michael S. Tsirkin <mst@redhat.com> Signed-off-by: Eduardo Habkost <ehabkost@redhat.com>
2015-02-23numa: Rename option parsing functionsEduardo Habkost1-1/+1
Renaming set_numa_nodes() and numa_init_func() to parse_numa_opts() and parse_numa() makes the purpose of those functions clearer. Reviewed-by: Paolo Bonzini <pbonzini@redhat.com> Acked-by: Michael S. Tsirkin <mst@redhat.com> Signed-off-by: Eduardo Habkost <ehabkost@redhat.com>
2015-02-23numa: Move QemuOpts parsing to set_numa_nodes()Eduardo Habkost1-1/+0
This allows us to make numa_init_func() static. Reviewed-by: Paolo Bonzini <pbonzini@redhat.com> Acked-by: Michael S. Tsirkin <mst@redhat.com> Signed-off-by: Eduardo Habkost <ehabkost@redhat.com>
2015-02-23numa: Make max_numa_nodeid staticEduardo Habkost1-3/+0
Now the only code that uses the variable is inside numa.c. Reviewed-by: Paolo Bonzini <pbonzini@redhat.com> Acked-by: Michael S. Tsirkin <mst@redhat.com> Signed-off-by: Eduardo Habkost <ehabkost@redhat.com>
2015-02-23numa: Move NUMA declarations from sysemu.h to numa.hEduardo Habkost2-18/+28
Not all sysemu.h users need the NUMA declarations, and keeping them in a separate file makes it easier to see what are the interfaces provided by numa.c. Reviewed-by: Paolo Bonzini <pbonzini@redhat.com> Acked-by: Michael S. Tsirkin <mst@redhat.com> Signed-off-by: Eduardo Habkost <ehabkost@redhat.com>
2015-02-13Merge remote-tracking branch 'remotes/rth/tags/pull-tcg-20150212' into stagingPeter Maydell1-5/+17
Convert to linked list. # gpg: Signature made Fri 13 Feb 2015 05:40:41 GMT using RSA key ID 4DD0279B # gpg: Good signature from "Richard Henderson <rth7680@gmail.com>" # gpg: aka "Richard Henderson <rth@redhat.com>" # gpg: aka "Richard Henderson <rth@twiddle.net>" * remotes/rth/tags/pull-tcg-20150212: tcg: Remove unused opcodes tcg: Implement insert_op_before tcg: Remove opcodes instead of noping them out tcg: Put opcodes in a linked list tcg: Introduce tcg_op_buf_count and tcg_op_buf_full tcg: Move emit of INDEX_op_end into gen_tb_end tcg: Reduce ifdefs in tcg-op.c tcg: Move some opcode generation functions out of line Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
2015-02-13arm: Add PCIe host bridge in virt machineAlexander Graf1-0/+9
Now that we have a working "generic" PCIe host bridge driver, we can plug it into ARM's virt machine to always have PCIe available to normal ARM VMs. I've successfully managed to expose a Bochs VGA device, XHCI and an e1000 into an AArch64 VM with this and they all lived happily ever after. Signed-off-by: Alexander Graf <agraf@suse.de> Tested-by: Claudio Fontana <claudio.fontana@huawei.com> [PMM: Squashed in fix for off-by-one error in bus-range DT property from Laszlo Ersek <lersek@redhat.com>] Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
2015-02-13pci: Add generic PCIe host bridgeAlexander Graf1-0/+56
With simple exposure of MMFG, ioport window, mmio window and an IRQ line we can successfully create a workable PCIe host bridge that can be mapped anywhere and only needs to get described to the OS using whatever means it likes. This patch implements such a "generic" host bridge. It handles 4 legacy IRQ lines. MSIs need to be handled external to the host bridge. This device is particularly useful for the "pci-host-ecam-generic" driver in Linux. Signed-off-by: Alexander Graf <agraf@suse.de> Reviewed-by: Claudio Fontana <claudio.fontana@huawei.com> Tested-by: Claudio Fontana <claudio.fontana@huawei.com> Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
2015-02-13pci: Allocate PCIe host bridge PCI IDAlexander Graf1-0/+1
We are going to introduce a PCIe host controller that doesn't exist that way in real hardware, but still needs to expose some PCIe root device which has PCI IDs. Allocate a PCI ID in the Red Hat space that we use for other devices of this kind. Signed-off-by: Alexander Graf <agraf@suse.de> Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
2015-02-12tcg: Put opcodes in a linked listRichard Henderson1-6/+16
The previous setup required ops and args to be completely sequential, and was error prone when it came to both iteration and optimization. Reviewed-by: Bastian Koppelmann <kbastian@mail.uni-paderborn.de> Signed-off-by: Richard Henderson <rth@twiddle.net>
2015-02-12tcg: Move emit of INDEX_op_end into gen_tb_endRichard Henderson1-0/+2
Reviewed-by: Bastian Koppelmann <kbastian@mail.uni-paderborn.de> Signed-off-by: Richard Henderson <rth@twiddle.net>
2015-02-11Merge remote-tracking branch 'remotes/awilliam/tags/vfio-update-20150210.0' ↵Peter Maydell2-1/+1
into staging RCU fixes and cleanup (Paolo Bonzini) Switch to v2 IOMMU interface (Alex Williamson) DEBUG build fix (Alexey Kardashevskiy) # gpg: Signature made Tue 10 Feb 2015 17:37:06 GMT using RSA key ID 3BB08B22 # gpg: Good signature from "Alex Williamson <alex.williamson@redhat.com>" # gpg: aka "Alex Williamson <alex@shazbot.org>" # gpg: aka "Alex Williamson <alwillia@redhat.com>" # gpg: aka "Alex Williamson <alex.l.williamson@gmail.com>" * remotes/awilliam/tags/vfio-update-20150210.0: vfio: Fix debug message compile error vfio: Use vfio type1 v2 IOMMU interface vfio: unmap and free BAR data in instance_finalize vfio: free dynamically-allocated data in instance_finalize vfio: cleanup vfio_get_device error path, remove vfio_populate_device callback memory: unregister AddressSpace MemoryListener within BQL Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
2015-02-10vfio: cleanup vfio_get_device error path, remove vfio_populate_device callbackPaolo Bonzini1-1/+0
Now that vfio_put_base_device is called unconditionally at instance_finalize time, it can be called twice if vfio_populate_device fails. This works but it is slightly harder to follow. Change vfio_get_device to not touch the vbasedev struct until it will definitely succeed, moving the vfio_populate_device call back to vfio-pci. This way, vfio_put_base_device will only be called once. Signed-off-by: Paolo Bonzini <pbonzini@redhat.com> Signed-off-by: Alex Williamson <alex.williamson@redhat.com>
2015-02-10memory: unregister AddressSpace MemoryListener within BQLPaolo Bonzini1-0/+1
address_space_destroy_dispatch is called from an RCU callback and hence outside the iothread mutex (BQL). However, after address_space_destroy no new accesses can hit the destroyed AddressSpace so it is not necessary to observe changes to the memory map. Move the memory_listener_unregister call earlier, to make it thread-safe again. Reported-by: Alex Williamson <alex.williamson@redhat.com> Fixes: 374f2981d1f10bc4307f250f24b2a7ddb9b14be0 Signed-off-by: Paolo Bonzini <pbonzini@redhat.com> Signed-off-by: Alex Williamson <alex.williamson@redhat.com>
2015-02-10migration: Fix warning caused by missing declaration of vmstate_dummyStefan Weil1-2/+0
Warning from the Sparse static analysis tool: stubs/vmstate.c:4:26: warning: symbol 'vmstate_dummy' was not declared. Should it be static? Cc: Juan Quintela <quintela@redhat.com> Cc: Amit Shah <amit.shah@redhat.com> Signed-off-by: Stefan Weil <sw@weilnetz.de> Signed-off-by: Michael Tokarev <mjt@tls.msk.ru>
2015-02-06Merge remote-tracking branch 'remotes/kevin/tags/for-upstream' into stagingPeter Maydell8-16/+89
Block patches for 2.3 # gpg: Signature made Fri 06 Feb 2015 17:14:10 GMT using RSA key ID C88F2FD6 # gpg: Good signature from "Kevin Wolf <kwolf@redhat.com>" * remotes/kevin/tags/for-upstream: (47 commits) block/raw-posix.c: Fix raw_getlength() on Mac OS X block devices block: Eliminate silly QERR_ macros used for encryption keys block: New bdrv_add_key(), convert monitor to use it blockdev: Eliminate silly QERR_BLOCK_JOB_NOT_ACTIVE macro blockdev: Give find_block_job() an Error ** parameter qcow2: Rewrite qcow2_alloc_bytes() block: Give always priority to unused entries in the qcow2 L2 cache nbd: fix max_discard/max_transfer_length block: introduce BDRV_REQUEST_MAX_SECTORS nbd: Improve error messages iotests: Fix 104 for NBD iotests: Fix 100 for nbd iotests: Fix 083 block: fix off-by-one error in qcow and qcow2 qemu-iotests: add 116 invalid QED input file tests qed: check for header size overflow block/dmg: improve zeroes handling block/dmg: support bzip2 block entry types block/dmg: factor out block type check block/dmg: use SectorNumber from BLKX header ... Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
2015-02-06block: Eliminate silly QERR_ macros used for encryption keysMarkus Armbruster1-6/+0
The QERR_ macros are leftovers from the days of "rich" error objects. They're used with error_set() and qerror_report(), and expand into the first *two* arguments. This trickiness has become pointless. Clean up QERR_DEVICE_ENCRYPTED and QERR_DEVICE_NOT_ENCRYPTED. Signed-off-by: Markus Armbruster <armbru@redhat.com> Reviewed-by: Eric Blake <eblake@redhat.com> Message-id: 1422524221-8566-5-git-send-email-armbru@redhat.com Reviewed-by: Max Reitz <mreitz@redhat.com> Signed-off-by: Max Reitz <mreitz@redhat.com>
2015-02-06block: New bdrv_add_key(), convert monitor to use itMarkus Armbruster1-0/+1
Signed-off-by: Markus Armbruster <armbru@redhat.com> Reviewed-by: Eric Blake <eblake@redhat.com> Message-id: 1422524221-8566-4-git-send-email-armbru@redhat.com Reviewed-by: Max Reitz <mreitz@redhat.com> Signed-off-by: Max Reitz <mreitz@redhat.com>
2015-02-06blockdev: Eliminate silly QERR_BLOCK_JOB_NOT_ACTIVE macroMarkus Armbruster1-3/+0
The QERR_ macros are leftovers from the days of "rich" error objects. They're used with error_set() and qerror_report(), and expand into the first *two* arguments. This trickiness has become pointless. Clean this one up. Signed-off-by: Markus Armbruster <armbru@redhat.com> Reviewed-by: Eric Blake <eblake@redhat.com> Message-id: 1422524221-8566-3-git-send-email-armbru@redhat.com Reviewed-by: Max Reitz <mreitz@redhat.com> Signed-off-by: Max Reitz <mreitz@redhat.com>
2015-02-06block: introduce BDRV_REQUEST_MAX_SECTORSPeter Lieven1-0/+3
we check and adjust request sizes at several places with sometimes inconsistent checks or default values: INT_MAX INT_MAX >> BDRV_SECTOR_BITS UINT_MAX >> BDRV_SECTOR_BITS SIZE_MAX >> BDRV_SECTOR_BITS This patches introdocues a macro for the maximal allowed sectors per request and uses it at several places. Signed-off-by: Peter Lieven <pl@kamp.de> Reviewed-by: Denis V. Lunev <den@openvz.org> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2015-02-06nbd: Improve error messagesMax Reitz1-1/+1
This patch makes use of the Error object for nbd_receive_negotiate() so that errors during negotiation look nicer. Furthermore, this patch adds an additional error message if the received magic was wrong, but would be correct for the other protocol version, respectively: So if an export name was specified, but the NBD server magic corresponds to an old handshake, this condition is explicitly signaled to the user, and vice versa. As these messages are now part of the "Could not open image" error message, additional filtering has to be employed in iotest 083, which this patch does as well. Signed-off-by: Max Reitz <mreitz@redhat.com> Reviewed-by: Paolo Bonzini <pbonzini@redhat.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2015-02-06block: add event when disk usage exceeds thresholdFrancesco Romani2-0/+68
Managing applications, like oVirt (http://www.ovirt.org), make extensive use of thin-provisioned disk images. To let the guest run smoothly and be not unnecessarily paused, oVirt sets a disk usage threshold (so called 'high water mark') based on the occupation of the device, and automatically extends the image once the threshold is reached or exceeded. In order to detect the crossing of the threshold, oVirt has no choice but aggressively polling the QEMU monitor using the query-blockstats command. This lead to unnecessary system load, and is made even worse under scale: deployments with hundreds of VMs are no longer rare. To fix this, this patch adds: * A new monitor command `block-set-write-threshold', to set a mark for a given block device. * A new event `BLOCK_WRITE_THRESHOLD', to report if a block device usage exceeds the threshold. * A new `write_threshold' field into the `BlockDeviceInfo' structure, to report the configured threshold. This will allow the managing application to use smarter and more efficient monitoring, greatly reducing the need of polling. [Updated qemu-iotests 067 output to add the new 'write_threshold' property. --Stefan] [Changed g_assert_false() to !g_assert() to fix the build on older glib versions. --Kevin] Signed-off-by: Francesco Romani <fromani@redhat.com> Reviewed-by: Eric Blake <eblake@redhat.com> Message-id: 1421068273-692-1-git-send-email-fromani@redhat.com Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2015-02-06virtio-blk: add a knob to disable request mergingPeter Lieven1-0/+1
this adds a knob to disable request merging for debugging or benchmarks if dedired. Signed-off-by: Peter Lieven <pl@kamp.de> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2015-02-06virtio-blk: introduce multireadPeter Lieven1-8/+11
this patch finally introduces multiread support to virtio-blk. While multiwrite support was there for a long time, read support was missing. The complete merge logic is moved into virtio-blk.c which has been the only user of request merging ever since. This is required to be able to merge chunks of requests and immediately invoke callbacks for those requests. Secondly, this is required to switch to direct invocation of coroutines which is planned at a later stage. The following benchmarks show the performance of running fio with 4 worker threads on a local ram disk. The numbers show the average of 10 test runs after 1 run as warmup phase. | 4k | 64k | 4k MB/s | rd seq | rd rand | rd seq | rd rand | wr seq | wr rand --------------+--------+---------+--------+---------+--------+-------- master | 1221 | 1187 | 4178 | 4114 | 1745 | 1213 multiread | 1829 | 1189 | 4639 | 4110 | 1894 | 1216 Signed-off-by: Peter Lieven <pl@kamp.de> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2015-02-06block-backend: expose bs->bl.max_transfer_lengthPeter Lieven1-0/+1
Signed-off-by: Peter Lieven <pl@kamp.de> Reviewed-by: Max Reitz <mreitz@redhat.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2015-02-06hw/virtio-blk: add a constant for max number of merged requestsPeter Lieven1-1/+3
As it was not obvious (at least for me) where the 32 comes from; add a constant for it. Signed-off-by: Peter Lieven <pl@kamp.de> Reviewed-by: Eric Blake <eblake@redhat.com> Reviewed-by: Max Reitz <mreitz@redhat.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2015-02-06block: add accounting for merged requestsPeter Lieven1-0/+3
Signed-off-by: Peter Lieven <pl@kamp.de> Reviewed-by: Eric Blake <eblake@redhat.com> Reviewed-by: Max Reitz <mreitz@redhat.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2015-02-06softfloat: expand out STATUS macroPeter Maydell1-16/+14
Expand out and remove the STATUS macro. Signed-off-by: Peter Maydell <peter.maydell@linaro.org> Reviewed-by: Richard Henderson <rth@twiddle.net>
2015-02-06softfloat: expand out STATUS_VARPeter Maydell1-5/+4
Expand out and remove the STATUS_VAR macro. Signed-off-by: Peter Maydell <peter.maydell@linaro.org> Reviewed-by: Richard Henderson <rth@twiddle.net>
2015-02-06softfloat: Expand out the STATUS_PARAM macroPeter Maydell1-166/+166
Expand out STATUS_PARAM wherever it is used and delete the definition. Signed-off-by: Peter Maydell <peter.maydell@linaro.org> Reviewed-by: Richard Henderson <rth@twiddle.net>
2015-02-05migration: Append JSON description of migration streamAlexander Graf2-1/+3
One of the annoyances of the current migration format is the fact that it's not self-describing. In fact, it's not properly describing at all. Some code randomly scattered throughout QEMU elaborates roughly how to read and write a stream of bytes. We discussed an idea during KVM Forum 2013 to add a JSON description of the migration protocol itself to the migration stream. This patch adds a section after the VM_END migration end marker that contains description data on what the device sections of the stream are composed of. This approach is backwards compatible with any QEMU version reading the stream, because QEMU just stops reading after the VM_END marker and ignores any data following it. With an additional external program this allows us to decipher the contents of any migration stream and hopefully make migration bugs easier to track down. Signed-off-by: Alexander Graf <agraf@suse.de> Signed-off-by: Amit Shah <amit.shah@redhat.com> Signed-off-by: Juan Quintela <quintela@redhat.com>
2015-02-05qemu-file: Add fast ftell code pathAlexander Graf1-0/+1
For ftell we flush the output buffer to ensure that we don't have anything lingering in our internal buffers. This is a very safe thing to do. However, with the dynamic size measurement that the dynamic vmstate description will bring this would turn out quite slow. Instead, we can fast path this specific measurement and just take the internal buffers into account when telling the kernel our position. I'm sure I overlooked some corner cases where this doesn't work, so instead of tuning the safe, existing version, this patch adds a fast variant of ftell that gets used by the dynamic vmstate description code which isn't critical when it fails. Signed-off-by: Alexander Graf <agraf@suse.de> Reviewed-by: Eric Blake <eblake@redhat.com> Signed-off-by: Amit Shah <amit.shah@redhat.com> Signed-off-by: Juan Quintela <quintela@redhat.com>
2015-02-05QJSON: Add JSON writerAlexander Graf1-0/+29
To support programmatic JSON assembly while keeping the code that generates it readable, this patch introduces a simple JSON writer. It emits JSON serially into a buffer in memory. The nice thing about this writer is its simplicity and low memory overhead. Unlike the QMP JSON writer, this one does not need to spawn QObjects for every element it wants to represent. This is a prerequisite for the migration stream format description generator. Signed-off-by: Alexander Graf <agraf@suse.de> Signed-off-by: Amit Shah <amit.shah@redhat.com> Signed-off-by: Juan Quintela <quintela@redhat.com>
2015-02-05cpu_ldst.h: Allow NB_MMU_MODES to be 7Peter Maydell1-3/+25
Support guest CPUs which need 7 MMU index values. Add a comment about what would be required to raise the limit further (trivial for 8, TCG backend rework for 9 or more). Signed-off-by: Peter Maydell <peter.maydell@linaro.org> Reviewed-by: Greg Bellows <greg.bellows@linaro.org> Reviewed-by: Richard Henderson <rth@twiddle.net>
2015-02-05target_arm: Parameterise the irq lines for armv7m_initAlistair Francis1-1/+1
This patch allows the board to specifiy the number of NVIC interrupt lines when using armv7m_init. Signed-off-by: Alistair Francis <alistair23@gmail.com> Reviewed-by: Peter Crosthwaite <peter.crosthwaite@xilinx.com> Message-id: 5a0b0fcc778df0340899f488053acc9493679e03.1422077994.git.alistair23@gmail.com [PMM: removed stale FIXME comment] Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
2015-02-05target_arm: Remove memory region init from armv7m_initAlistair Francis1-2/+1
This patch moves the memory region init code from the armv7m_init function to the stellaris_init function Signed-off-by: Alistair Francis <alistair23@gmail.com> Reviewed-by: Peter Crosthwaite <peter.crosthwaite@xilinx.com> Message-id: 4836be7e1d708554d6eb0bc639dc2fbf7dac0458.1422077994.git.alistair23@gmail.com Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
2015-02-05Merge remote-tracking branch 'remotes/armbru/tags/pull-error-2015-02-05' ↵Peter Maydell2-9/+10
into staging qmp hmp balloon: Cleanups around error reporting # gpg: Signature made Thu 05 Feb 2015 07:15:11 GMT using RSA key ID EB918653 # gpg: Good signature from "Markus Armbruster <armbru@redhat.com>" # gpg: aka "Markus Armbruster <armbru@pond.sub.org>" * remotes/armbru/tags/pull-error-2015-02-05: balloon: Eliminate silly QERR_ macros balloon: Factor out common "is balloon active" test balloon: Inline qemu_balloon(), qemu_balloon_status() qmp: Eliminate silly QERR_COMMAND_NOT_FOUND macro qmp: Simplify recognition of capability negotiation command qmp: Clean up qmp_query_spice() #ifndef !CONFIG_SPICE dummy hmp: Compile hmp_info_spice() only with CONFIG_SPICE qmp hmp: Improve error messages when SPICE is not in use qmp hmp: Factor out common "using spice" test Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
2015-02-02Merge remote-tracking branch 'remotes/bonzini/tags/for-upstream' into stagingPeter Maydell6-4/+226
The important bits here are the first part of RCU. v1->v2 changes are the new qemu-thread patch to fix Mac OS X, and cleaning up warnings. v2->v3 removed the patch to enable modules by default. # gpg: Signature made Mon 02 Feb 2015 19:28:03 GMT using RSA key ID 78C7AE83 # gpg: Good signature from "Paolo Bonzini <bonzini@gnu.org>" # gpg: aka "Paolo Bonzini <pbonzini@redhat.com>" # gpg: WARNING: This key is not certified with sufficiently trusted signatures! # gpg: It is not certain that the signature belongs to the owner. # Primary key fingerprint: 46F5 9FBD 57D6 12E7 BFD4 E2F7 7E15 100C CD36 69B1 # Subkey fingerprint: F133 3857 4B66 2389 866C 7682 BFFB D25F 78C7 AE83 * remotes/bonzini/tags/for-upstream: scsi: Fix scsi_req_cancel_async for no aiocb req cpu-exec: simplify init_delay_params cpu-exec: simplify align_clocks memory: avoid ref/unref in memory_region_find memory: protect current_map by RCU memory: remove assertion on memory_region_destroy rcu: add call_rcu rcu: allow nesting of rcu_read_lock/rcu_read_unlock rcu: add rcutorture rcu: add rcu library qemu-thread: fix qemu_event without futexes Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
2015-02-02cpu-exec: simplify init_delay_paramsPaolo Bonzini1-1/+0
With the introduction of QEMU_CLOCK_VIRTUAL_RT, the computation of sc->diff_clk can be simplified nicely: qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL) - qemu_clock_get_ns(QEMU_CLOCK_REALTIME) + cpu_get_clock_offset() = qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL) - (qemu_clock_get_ns(QEMU_CLOCK_REALTIME) - cpu_get_clock_offset()) = qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL) - (qemu_clock_get_ns(QEMU_CLOCK_REALTIME) + timers_state.cpu_clock_offset) = qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL) - qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL_RT) Cc: Sebastian Tanase <sebastian.tanase@openwide.fr> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2015-02-02memory: protect current_map by RCUPaolo Bonzini1-0/+5
Replace the flat_view_mutex with RCU, avoiding futex contention for dataplane on large systems and many iothreads. Reviewed-by: Fam Zheng <famz@redhat.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2015-02-02rcu: add call_rcuPaolo Bonzini1-0/+22
Asynchronous callbacks provided by call_rcu are particularly important for QEMU, because the BQL makes it hard to use synchronize_rcu. In addition, the current RCU implementation is not particularly friendly to multiple concurrent synchronize_rcu callers, making call_rcu even more important. Reviewed-by: Fam Zheng <famz@redhat.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2015-02-02rcu: allow nesting of rcu_read_lock/rcu_read_unlockPaolo Bonzini1-1/+14
Reviewed-by: Fam Zheng <famz@redhat.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2015-02-02rcu: add rcu libraryPaolo Bonzini4-3/+186
This includes a (mangled) copy of the liburcu code. The main changes are: 1) removing dependencies on many other header files in liburcu; 2) removing for simplicity the tentative busy waiting in synchronize_rcu, which has limited performance effects; 3) replacing futexes in synchronize_rcu with QemuEvents for Win32 portability. The API is the same as liburcu, so it should be possible in the future to require liburcu on POSIX systems for example and use our copy only on Windows. Among the various versions available I chose urcu-mb, which is the least invasive implementation even though it does not have the fastest rcu_read_{lock,unlock} implementation. The urcu flavor can be changed later, after benchmarking. Reviewed-by: Fam Zheng <famz@redhat.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2015-01-29softfloat: Clarify license statusPeter Maydell1-1/+47
The code in the softfloat source files is under a mixture of licenses: the original code and many changes from QEMU contributors are under the base SoftFloat-2a license; changes from Stefan Weil and RedHat employees are GPLv2-or-later; changes from Fabrice Bellard are under the BSD license. Clarify this in the comments at the top of each affected source file, including a statement about the assumed licensing for future contributions, so we don't need to remember to ask patch submitters explicitly to pick a license. Signed-off-by: Peter Maydell <peter.maydell@linaro.org> Acked-by: Andreas Färber <afaerber@suse.de> Acked-by: Aurelien Jarno <aurelien@aurel32.net> Acked-by: Avi Kivity <avi.kivity@gmail.com> Acked-by: Ben Taylor <bentaylor.solx86@gmail.com> Acked-by: Blue Swirl <blauwirbel@gmail.com> Acked-by: Christophe Lyon <christophe.lyon@st.com> Acked-by: Fabrice Bellard <fabrice@bellard.org> Acked-by: Guan Xuetao <gxt@mprc.pku.edu.cn> Acked-by: Juan Quintela <quintela@redhat.com> Acked-by: Max Filippov <jcmvbkbc@gmail.com> Acked-by: Paul Brook <paul@codesourcery.com> Acked-by: Paolo Bonzini <pbonzini@redhat.com> Acked-by: Peter Maydell <peter.maydell@linaro.org> Acked-by: Richard Henderson <rth@twiddle.net> Acked-by: Richard Sandiford <rdsandiford@googlemail.com> Acked-by: Stefan Weil <sw@weilnetz.de> Reviewed-by: Paolo Bonzini <pbonzini@redhat.com> Message-id: 1421073508-23909-5-git-send-email-peter.maydell@linaro.org
2015-01-29softfloat: Revert and reimplement remaining portions of 75d62a5856 and ↵Peter Maydell1-2/+2
3430b0be36f Revert the remaining portions of commits 75d62a5856 and 3430b0be36f which are under a SoftFloat-2b license, ie the functions uint64_to_float32() and uint64_to_float64(). (The float64_to_uint64() and float64_to_uint64_round_to_zero() functions were completely rewritten in commits fb3ea83aa and 0a87a3107d so can stay.) Reimplement from scratch the uint64_to_float64() and uint64_to_float32() conversion functions. [This is a mechanical squashing together of two separate "revert" and "reimplement" patches.] Signed-off-by: Peter Maydell <peter.maydell@linaro.org> Reviewed-by: Paolo Bonzini <pbonzini@redhat.com> Message-id: 1421073508-23909-3-git-send-email-peter.maydell@linaro.org
2015-01-29softfloat: Apply patch corresponding to rebasing to softfloat-2aPeter Maydell1-17/+15
This commit applies the changes to master which correspond to replacing commit 158142c2c2df with a set of changes made by: * taking the SoftFloat-2a release * mechanically transforming the block comment style * reapplying Fabrice's original changes from 158142c2c2df This commit was created by: diff -u 158142c2c2df import-sf-2a patch -p1 --fuzz 10 <../relicense-patch.txt (where import-sf-2a is the branch resulting from the changes above). Signed-off-by: Peter Maydell <peter.maydell@linaro.org> Reviewed-by: Paolo Bonzini <pbonzini@redhat.com> Message-id: 1421073508-23909-2-git-send-email-peter.maydell@linaro.org
2015-01-29balloon: Eliminate silly QERR_ macrosMarkus Armbruster1-6/+0
The QERR_ macros are leftovers from the days of "rich" error objects. They're used with error_set() and qerror_report(), and expand into the first *two* arguments. This trickiness has become pointless. Clean up the balloon ones. Signed-off-by: Markus Armbruster <armbru@redhat.com> Reviewed-by: Eric Blake <eblake@redhat.com> Signed-off-by: Markus Armbruster <armbru@redhat.com>
2015-01-29qmp: Eliminate silly QERR_COMMAND_NOT_FOUND macroMarkus Armbruster1-3/+0
The QERR_ macros are leftovers from the days of "rich" error objects. They're used with error_set() and qerror_report(), and expand into the first *two* arguments. This trickiness has become pointless. Clean this one up. Signed-off-by: Markus Armbruster <armbru@redhat.com> Reviewed-by: Eric Blake <eblake@redhat.com>
2015-01-29qmp hmp: Improve error messages when SPICE is not in useMarkus Armbruster1-2/+2
Commit 7572150 adopted QERR_DEVICE_NOT_ACTIVE for the purpose, probably because adding another error seemed cumbersome overkill. Produces "No spice device has been activated", which is awkward. We've since abandoned our quest for "rich" error objects. Time to undo the damage to this error message. Replace it by "SPICE is not in use". Keep the stupid DeviceNotActive ErrorClass for compatibility, even though Libvirt doesn't use it. Signed-off-by: Markus Armbruster <armbru@redhat.com> Reviewed-by: Eric Blake <eblake@redhat.com> Reviewed-by: Gerd Hoffmann <kraxel@redhat.com>
2015-01-29qmp hmp: Factor out common "using spice" testMarkus Armbruster1-0/+10
Into qemu_using_spice(). For want of a better place, put it next the existing monitor command handler dummies in qemu-spice.h. Signed-off-by: Markus Armbruster <armbru@redhat.com> Reviewed-by: Eric Blake <eblake@redhat.com> Reviewed-by: Gerd Hoffmann <kraxel@redhat.com>
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