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2011-08-12scsi: move sense handling to generic codePaolo Bonzini1-0/+1
With this patch, sense data is stored in the generic data structures for SCSI devices and requests. The SCSI layer takes care of storing sense data in the SCSIDevice for the subsequent REQUEST SENSE command. At the same time, get_sense is removed and scsi_req_get_sense can use an entirely generic implementation. Reviewed-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2011-08-02coroutines: LocksKevin Wolf1-0/+8
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2011-08-02block: Add bdrv_co_readv/writev emulationKevin Wolf1-0/+1
In order to be able to call bdrv_co_readv/writev for drivers that don't implement the functions natively, add an emulation that uses the AIO functions to implement them. Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2011-08-02block: Add bdrv_co_readv/writevKevin Wolf1-0/+2
Add new block driver callbacks bdrv_co_readv/writev, which work on a QEMUIOVector like bdrv_aio_*, but don't need a callback. The function may only be called inside a coroutine, so a block driver implementing this interface can yield instead of blocking during I/O. Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2011-08-01coroutine: introduce coroutinesKevin Wolf1-0/+5
Asynchronous code is becoming very complex. At the same time synchronous code is growing because it is convenient to write. Sometimes duplicate code paths are even added, one synchronous and the other asynchronous. This patch introduces coroutines which allow code that looks synchronous but is asynchronous under the covers. A coroutine has its own stack and is therefore able to preserve state across blocking operations, which traditionally require callback functions and manual marshalling of parameters. Creating and starting a coroutine is easy: coroutine = qemu_coroutine_create(my_coroutine); qemu_coroutine_enter(coroutine, my_data); The coroutine then executes until it returns or yields: void coroutine_fn my_coroutine(void *opaque) { MyData *my_data = opaque; /* do some work */ qemu_coroutine_yield(); /* do some more work */ } Yielding switches control back to the caller of qemu_coroutine_enter(). This is typically used to switch back to the main thread's event loop after issuing an asynchronous I/O request. The request callback will then invoke qemu_coroutine_enter() once more to switch back to the coroutine. Note that if coroutines are used only from threads which hold the global mutex they will never execute concurrently. This makes programming with coroutines easier than with threads. Race conditions cannot occur since only one coroutine may be active at any time. Other coroutines can only run across yield. This coroutines implementation is based on the gtk-vnc implementation written by Anthony Liguori <anthony@codemonkey.ws> but it has been significantly rewritten by Kevin Wolf <kwolf@redhat.com> to use setjmp()/longjmp() instead of the more expensive swapcontext() and by Paolo Bonzini <pbonzini@redhat.com> for Windows Fibers support. Signed-off-by: Kevin Wolf <kwolf@redhat.com> Signed-off-by: Stefan Hajnoczi <stefanha@linux.vnet.ibm.com>
2011-07-22usb-ehci: trace: rename "next" to "nxt".Gerd Hoffmann1-3/+3
"next" is reserved in systemtap thus using this as a trace parameter name causes trouble when trying to trace with systemtap. Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
2011-07-20ds1225y: use trace frameworkHervé Poussineau1-0/+4
Signed-off-by: Hervé Poussineau <hpoussin@reactos.org> Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
2011-07-19Merge remote-tracking branch 'agraf/xen-next' into stagingAnthony Liguori1-3/+3
2011-07-18virtio-console: Add some trace eventsAmit Shah1-0/+5
Add some trace events for messages passed between the char layer and the virtio-serial bus. Signed-off-by: Amit Shah <amit.shah@redhat.com>
2011-07-18virtio-serial-bus: Add trace eventsAmit Shah1-0/+6
Add some trace events for messages passed between the guest and host. Signed-off-by: Amit Shah <amit.shah@redhat.com>
2011-07-17xen: Clean up map cache API namingJan Kiszka1-3/+3
The map cache is a Xen thing, so its API should make this clear. Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com> Signed-off-by: Alexander Graf <agraf@suse.de>
2011-06-19xen: Add the Xen platform pci deviceSteven Smith1-0/+3
Introduce a new emulated PCI device, specific to fully virtualized Xen guests. The device is necessary for PV on HVM drivers to work. Signed-off-by: Steven Smith <ssmith@xensource.com> Signed-off-by: Anthony PERARD <anthony.perard@citrix.com> Signed-off-by: Stefano Stabellini <stefano.stabellini@eu.citrix.com> Signed-off-by: Alexander Graf <agraf@suse.de>
2011-06-19xen: Introduce VGA sync dirty bitmap supportAnthony PERARD1-0/+1
This patch introduces phys memory client for Xen. Only sync dirty_bitmap and set_memory are actually implemented. migration_log will stay empty for the moment. Xen can only log one range for bit change, so only the range in the first call will be synced. Signed-off-by: Anthony PERARD <anthony.perard@citrix.com> Signed-off-by: Alexander Graf <agraf@suse.de>
2011-06-14usb-ehci: split trace calls to handle arg count limitsGerd Hoffmann1-2/+6
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
2011-06-14usb-ehci: itd handling fixes.Gerd Hoffmann1-1/+1
This patch fixes a bunch of issues in the itd descriptor handling. Most important fix is to handle transfers which cross page borders correctly by looking up the address of the next page. Luckily the linux uses physically contigous memory so the data used to hits the correct location even with this bug instead of corrupting guest memory. Also the transfer length updates for outgoing transfers wasn't correct. While being at it DPRINTFs have been replaced by tracepoints. The isoch_pause logic has been disabled. Not clear to me which propose this serves and I think it is incorrect too as we just skip processing itds. Even when no xfer happens we have to clear the active bit. Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
2011-06-14usb-ehci: multiqueue supportGerd Hoffmann1-2/+3
This patch adds support for keeping multiple queues going at the same time. One slow device will not affect other devices any more. The patch adds code to manage EHCIQueue structs. It also does a number of changes to the state machine: * The state machine will never ever stop in EXECUTING any more. Instead it will continue with the next queue (aka HORIZONTALQH) when the usb device returns USB_RET_ASYNC. * The state machine will stop processing when it figures it walks in circles (easy to figure now that we have a EHCIQueue struct for each QH we've processed). The bailout logic should not be needed any more. For now it is still in, but will assert() in case it triggers. * The state machine will just skip queues with a async USBPacket in flight. * The state machine will resume processing as soon as the async USBPacket is finished. The patch also takes care to flush the QH struct back to guest memory when needed, so we don't get stale data when (re-)loading it from guest memory in FETCHQH state. It also makes the writeback code to not touch the first three dwords of the QH struct as the EHCI must not write them. This actually fixes a bug where QH chaining changes (next ptr) by the linux ehci driver where overwritten by the emulated EHCI. Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
2011-06-14usb-ehci: trace buffer copyGerd Hoffmann1-0/+1
Add a trace point for buffer copies and drop the DPRINTF's. No change in behavior. Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
2011-06-14usb-ehci: improve mmio tracingGerd Hoffmann1-1/+2
Add a separate tracepoint to log how register values change in response to a mmio write. Especially useful for registers which have read-only or clear-on-write bits in them. No change in behavior. Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
2011-06-14usb-ehci: trace port stateGerd Hoffmann1-0/+3
Trace usb port operations (attach, detach, reset), drop a few obsolete DPRINTF's. No change in behavior. Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
2011-06-14usb-ehci: trace state machine changesGerd Hoffmann1-0/+4
Add functions to get and set the current state of the state machine, add tracepoints there to trace state transitions. Add support for traceing the queue heads and transfer descriptors as we look at them. Drop a few DPRINTFs and all DPRINTF_ST lines, they are obsolete now. No change in behavior. Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
2011-06-14usb-ehci: trace mmio and usbstsGerd Hoffmann1-0/+6
This patch starts adding trace support to ehci. It traces updates of the status register (USBSTS), mmio access and controller reset. It also adds functions to set and clear status register bits and puts them in use everywhere. Some DPRINTF's are dropped in favor of the new tracepoints. No change in behavior. Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
2011-06-05scsi: fix tracing of scsi requests with simple backendPaolo Bonzini1-1/+2
The simple backend only supports a maximum of 6 arguments. Split the scsi_req_parsed event in two parts to cope with the limit. Signed-off-by: Paolo Bonzini <pbonzini@redhat.com> Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
2011-05-26scsi: introduce scsi_req_continuePaolo Bonzini1-0/+1
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com> Cc: Christoph Hellwig <hch@lst.de>
2011-05-26scsi: introduce scsi_req_dataPaolo Bonzini1-0/+1
This abstracts calling the command_complete callback, reducing churn in the following patches. Signed-off-by: Paolo Bonzini <pbonzini@redhat.com> Reviewed-by: Christoph Hellwig <hch@lst.de>
2011-05-26scsi: add tracing of scsi requestsPaolo Bonzini1-0/+6
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com> Reviewed-by: Christoph Hellwig <hch@lst.de>
2011-05-18qed: Periodically flush and clear need check bitStefan Hajnoczi1-0/+3
One strategy to limit the startup delay of consistency check when opening image files is to ensure that the file is marked dirty for as little time as possible. QED currently marks the image dirty when the first allocating write request is issued and clears the dirty bit again when the image is cleanly closed. In practice that means the image is marked dirty for most of a guest's lifetime and prone to being in a dirty state upon crash or power failure. It is safe to clear the dirty bit after all allocating write requests have completed and a flush has been performed. This patch adds a timer after the last allocating write request completes. When the timer fires it will flush and then clear the dirty bit. The timer is set to 5 seconds and is cancelled upon arrival of a new allocating write request. Signed-off-by: Stefan Hajnoczi <stefanha@linux.vnet.ibm.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2011-05-08Introduce qemu_put_ram_ptrAnthony PERARD1-0/+3
This function allows to unlock a ram_ptr give by qemu_get_ram_ptr. After a call to qemu_put_ram_ptr, the pointer may be unmap from QEMU when used with Xen. Signed-off-by: Anthony PERARD <anthony.perard@citrix.com> Acked-by: Alexander Graf <agraf@suse.de> Signed-off-by: Alexander Graf <agraf@suse.de>
2011-05-08xen: Introduce the Xen mapcacheJun Nakajima1-0/+10
On IA32 host or IA32 PAE host, at present, generally, we can't create an HVM guest with more than 2G memory, because generally it's almost impossible for Qemu to find a large enough and consecutive virtual address space to map an HVM guest's whole physical address space. The attached patch fixes this issue using dynamic mapping based on little blocks of memory. Each call to qemu_get_ram_ptr makes a call to qemu_map_cache with the lock option, so mapcache will not unmap these ram_ptr. Blocks that do not belong to the RAM, but usually to a device ROM or to a framebuffer, are handled in a separate function. So the whole RAMBlock can be map. Signed-off-by: Jun Nakajima <jun.nakajima@intel.com> Signed-off-by: Anthony PERARD <anthony.perard@citrix.com> Signed-off-by: Stefano Stabellini <stefano.stabellini@eu.citrix.com> Signed-off-by: Alexander Graf <agraf@suse.de>
2011-05-03lm32: add Milkymist Minimac2 supportMichael Walle1-11/+12
This patch adds support for Milkymist's minimal Ethernet MAC v2. It superseds minimac1. Signed-off-by: Michael Walle <michael@walle.cc> Signed-off-by: Edgar E. Iglesias <edgar.iglesias@gmail.com>
2011-04-26trace: [trace-events] fix print formats in some eventsLluís1-2/+2
Signed-off-by: Lluís Vilanova <vilanova@ac.upc.edu> Signed-off-by: Stefan Hajnoczi <stefanha@linux.vnet.ibm.com>
2011-04-26trace: Remove %s in grlib trace eventsStefan Hajnoczi1-5/+5
Trace events cannot use %s in their format strings because trace backends vary in how they can deference pointers (if at all). Recording const char * values is not meaningful if their contents are not recorded too. Change grlib trace events that rely on strings so that they communicate similar information without using strings. A follow-up patch explains this limitation and updates docs/tracing.txt. Signed-off-by: Stefan Hajnoczi <stefanha@linux.vnet.ibm.com>
2011-04-07trace: Trace bdrv_set_locked()Stefan Hajnoczi1-0/+1
It can be handy to know when the guest locks/unlocks the CD-ROM tray. This trace event makes that possible. Signed-off-by: Stefan Hajnoczi <stefanha@linux.vnet.ibm.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2011-04-04lm32: add Milkymist VGAFB supportMichael Walle1-0/+4
This patch adds support for Milkymist's VGA framebuffer. Signed-off-by: Michael Walle <michael@walle.cc> Signed-off-by: Edgar E. Iglesias <edgar.iglesias@gmail.com>
2011-04-04lm32: add Milkymist UART supportMichael Walle1-0/+6
This patch adds support for Milkymist's simple UART. Signed-off-by: Michael Walle <michael@walle.cc> Signed-off-by: Edgar E. Iglesias <edgar.iglesias@gmail.com>
2011-04-04lm32: add Milkymist TMU2 supportMichael Walle1-0/+6
This patch adds support for Milkymist's texture mapping unit. For fast computation this model needs hardware accelerated 3D graphics support (OpenGL). There is no graphical output, all computations belong to internal framebuffers only. Signed-off-by: Michael Walle <michael@walle.cc> Signed-off-by: Edgar E. Iglesias <edgar.iglesias@gmail.com>
2011-04-04lm32: add Milkymist System Controller supportMichael Walle1-0/+11
This patch adds support for Milkymist's System Controller core. The model has the following features: - support for shutting down and restarting the board - provide two timers and GPIO - provide registers for system identification and reading the boards capabilities Signed-off-by: Michael Walle <michael@walle.cc> Signed-off-by: Edgar E. Iglesias <edgar.iglesias@gmail.com>
2011-04-04lm32: add Milkymist SoftUSB supportMichael Walle1-0/+8
This patch adds support for Milkymist's SoftUSB core. This model differ from the real hardware in its functionality. The real hardware consits of a tiny freely programmable microcontroller which controls the USB ports. For simplicity reasons, this model emulates only keyboard and mouse input devices, eg. input events translates directly to the corresponding expected messages. Signed-off-by: Michael Walle <michael@walle.cc> Signed-off-by: Edgar E. Iglesias <edgar.iglesias@gmail.com>
2011-04-04lm32: add Milkymist PFPU supportMichael Walle1-0/+6
This patch adds support for Milkymist's Programmable FPU. Signed-off-by: Michael Walle <michael@walle.cc> Signed-off-by: Edgar E. Iglesias <edgar.iglesias@gmail.com>
2011-04-04lm32: add Milkymist Minimac supportMichael Walle1-0/+12
This patch adds support for Milkymist's minimal Ethernet MAC. Signed-off-by: Michael Walle <michael@walle.cc> Signed-off-by: Edgar E. Iglesias <edgar.iglesias@gmail.com>
2011-04-04lm32: add Milkymist memory card supportMichael Walle1-2/+6
This patch adds support for Milkymist's memory card core. Signed-off-by: Michael Walle <michael@walle.cc> Signed-off-by: Edgar E. Iglesias <edgar.iglesias@gmail.com>
2011-04-04lm32: add Milkymist HPDMC supportMichael Walle1-0/+4
This patch adds support for the Milkymist's High Performance Dynamic Memory Controller. This is just a dumb model without any functionality. While the real hardware acts for example as a bridge between software and hardware for sending SDRAM commans, this model will only eat up these commands and always returns the expected hardware states, eg. PLL locked etc. Signed-off-by: Michael Walle <michael@walle.cc> Signed-off-by: Edgar E. Iglesias <edgar.iglesias@gmail.com>
2011-04-04lm32: add Milkymist AC97 supportMichael Walle1-0/+12
This patch adds support for the Milkymist AC97 compatible sound output and input core. Signed-off-by: Michael Walle <michael@walle.cc> Signed-off-by: Edgar E. Iglesias <edgar.iglesias@gmail.com>
2011-03-07trace: Trace posix-aio-compat.c completion and cancellationStefan Hajnoczi1-0/+2
This patch adds paio_complete() and paio_cancel() trace events to complement the paio_submit() event. Signed-off-by: Stefan Hajnoczi <stefanha@linux.vnet.ibm.com>
2011-03-07trace: Trace bdrv_aio_flush()Stefan Hajnoczi1-0/+1
Add a trace event for bdrv_aio_flush() to complement the existing bdrv_aio_readv() and bdrv_aio_writev() events. Signed-off-by: Stefan Hajnoczi <stefanha@linux.vnet.ibm.com>
2011-03-07lm32: system control modelMichael Walle1-0/+3
This patch add support for a system control block. It is supposed to act as helper for the emulated program. E.g. shutting down the VM or printing test results. This model is intended for testing purposes only and doesn't fit to any real hardware. Therefore, it is not added to any board by default. Instead a user has to add it explicitly with the '-device' commandline parameter. Signed-off-by: Michael Walle <michael@walle.cc> Signed-off-by: Edgar E. Iglesias <edgar.iglesias@gmail.com>
2011-03-07lm32: uart modelMichael Walle1-0/+5
This patch add support for the LatticeMico32 UART. Signed-off-by: Michael Walle <michael@walle.cc> Signed-off-by: Edgar E. Iglesias <edgar.iglesias@gmail.com>
2011-03-07lm32: timer modelMichael Walle1-0/+6
This patch adds support for the LatticeMico32 system timer. Signed-off-by: Michael Walle <michael@walle.cc> Signed-off-by: Edgar E. Iglesias <edgar.iglesias@gmail.com>
2011-03-07lm32: juart modelMichael Walle1-0/+6
This patch adds the JTAG UART model. It is accessed through special control registers and opcodes. Therefore the translation uses callbacks to this model. Signed-off-by: Michael Walle <michael@walle.cc> Signed-off-by: Edgar E. Iglesias <edgar.iglesias@gmail.com>
2011-03-07lm32: interrupt controller modelMichael Walle1-0/+9
This patch adds the interrupt controller of the lm32. Because the PIC is accessed through special control registers and opcodes, there are callbacks from the lm32 translation code to this model. Signed-off-by: Michael Walle <michael@walle.cc> Signed-off-by: Edgar E. Iglesias <edgar.iglesias@gmail.com>
2011-02-01Merge remote branch 'spice/spice.v29.pull' into stagingAnthony Liguori1-0/+6
Conflicts: trace-events