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2013-01-29s390: Add new channel I/O based virtio transport.Cornelia Huck1-0/+4
Add a new virtio transport that uses channel commands to perform virtio operations. Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com> Signed-off-by: Alexander Graf <agraf@suse.de>
2013-01-29s390: Virtual channel subsystem support.Cornelia Huck1-0/+8
Provide a mechanism for qemu to provide fully virtual subchannels to the guest. Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com> Signed-off-by: Alexander Graf <agraf@suse.de>
2013-01-29s390: Add channel I/O instructions.Cornelia Huck1-0/+6
Provide handlers for (most) channel I/O instructions. Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com> Signed-off-by: Alexander Graf <agraf@suse.de>
2013-01-25mirror: support arbitrarily-sized iterationsPaolo Bonzini1-0/+1
Yet another optimization is to extend the mirroring iteration to include more adjacent dirty blocks. This limits the number of I/O operations and makes mirroring efficient even with a small granularity. Most of the infrastructure is already in place; we only need to put a loop around the computation of the origin and sector count of the iteration. Signed-off-by: Paolo Bonzini <pbonzini@redhat.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2013-01-25mirror: support more than one in-flight AIO operationPaolo Bonzini1-1/+3
With AIO support in place, we can start copying more than one chunk in parallel. This patch introduces the required infrastructure for this: the buffer is split into multiple granularity-sized chunks, and there is a free list to access them. Because of copy-on-write, a single operation may already require multiple chunks to be available on the free list. In addition, two different iterations on the HBitmap may want to copy the same cluster. We avoid this by keeping a bitmap of in-flight I/O operations, and blocking until the previous iteration completes. This should be a pretty rare occurrence, though; as long as there is no overlap the next iteration can start before the previous one finishes. Signed-off-by: Paolo Bonzini <pbonzini@redhat.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2013-01-25mirror: switch mirror_iteration to AIOPaolo Bonzini1-0/+2
There is really no change in the behavior of the job here, since there is still a maximum of one in-flight I/O operation between the source and the target. However, this patch already introduces the AIO callbacks (which are unmodified in the next patch) and some of the logic to count in-flight operations and only complete the job when there is none. Signed-off-by: Paolo Bonzini <pbonzini@redhat.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2013-01-25mirror: perform COW if the cluster size is bigger than the granularityPaolo Bonzini1-0/+1
When mirroring runs, the backing files for the target may not yet be ready. However, this means that a copy-on-write operation on the target would fill the missing sectors with zeros. Copy-on-write only happens if the granularity of the dirty bitmap is smaller than the cluster size (and only for clusters that are allocated in the source after the job has started copying). So far, the granularity was fixed to 1MB; to avoid the problem we detected the situation and required the backing files to be available in that case only. However, we want to lower the granularity for efficiency, so we need a better solution. The solution is to always copy a whole cluster the first time it is touched. The code keeps a bitmap of clusters that have already been allocated by the mirroring job, and only does "manual" copy-on-write if the chunk being copied is zero in the bitmap. Signed-off-by: Paolo Bonzini <pbonzini@redhat.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2013-01-25block: implement dirty bitmap using HBitmapPaolo Bonzini1-0/+1
This actually uses the dirty bitmap in the block layer, and converts mirroring to use an HBitmapIter. Reviewed-by: Laszlo Ersek <lersek@redhat.com> (except block/mirror.c parts) Reviewed-by: Eric Blake <eblake@redhat.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2013-01-25add hierarchical bitmap data type and test casesPaolo Bonzini1-0/+5
HBitmaps provides an array of bits. The bits are stored as usual in an array of unsigned longs, but HBitmap is also optimized to provide fast iteration over set bits; going from one bit to the next is O(logB n) worst case, with B = sizeof(long) * CHAR_BIT: the result is low enough that the number of levels is in fact fixed. In order to do this, it stacks multiple bitmaps with progressively coarser granularity; in all levels except the last, bit N is set iff the N-th unsigned long is nonzero in the immediately next level. When iteration completes on the last level it can examine the 2nd-last level to quickly skip entire words, and even do so recursively to skip blocks of 64 words or powers thereof (32 on 32-bit machines). Given an index in the bitmap, it can be split in group of bits like this (for the 64-bit case): bits 0-57 => word in the last bitmap | bits 58-63 => bit in the word bits 0-51 => word in the 2nd-last bitmap | bits 52-57 => bit in the word bits 0-45 => word in the 3rd-last bitmap | bits 46-51 => bit in the word So it is easy to move up simply by shifting the index right by log2(BITS_PER_LONG) bits. To move down, you shift the index left similarly, and add the word index within the group. Iteration uses ffs (find first set bit) to find the next word to examine; this operation can be done in constant time in most current architectures. Setting or clearing a range of m bits on all levels, the work to perform is O(m + m/W + m/W^2 + ...), which is O(m) like on a regular bitmap. When iterating on a bitmap, each bit (on any level) is only visited once. Hence, The total cost of visiting a bitmap with m bits in it is the number of bits that are set in all bitmaps. Unless the bitmap is extremely sparse, this is also O(m + m/W + m/W^2 + ...), so the amortized cost of advancing from one bit to the next is usually constant. Reviewed-by: Laszlo Ersek <lersek@redhat.com> Reviewed-by: Eric Blake <eblake@redhat.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2013-01-22qxl: stop using non revision 4 rom fields for revision < 4Alon Levy1-0/+2
Signed-off-by: Alon Levy <alevy@redhat.com> Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
2013-01-19fw_cfg: Use void *, size_t instead of uint8_t *, uint32_t for blobsMarkus Armbruster1-1/+1
Many callers pass size_t, which gets silently truncated to uint32_t. Harmless, because all practical sizes are well below 4GiB. Clean it up anyway. Size overflow now fails assertions. Bonus: saves a whole bunch of silly casts. Signed-off-by: Markus Armbruster <armbru@redhat.com> Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
2013-01-19fw_cfg: Replace debug prints by tracepointsMarkus Armbruster1-0/+7
Signed-off-by: Markus Armbruster <armbru@redhat.com> Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
2013-01-10Merge branch 'master' of git://git.qemu.org/qemu into prep-upAndreas Färber1-11/+84
Conflicts: hw/Makefile.objs hw/ppc_prep.c Signed-off-by: Andreas Färber <andreas.faerber@web.de>
2013-01-08uhci: stop using portio listsGerd Hoffmann1-2/+0
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
2013-01-02dataplane: add virtio-blk data plane codeStefan Hajnoczi1-0/+6
virtio-blk-data-plane is a subset implementation of virtio-blk. It only handles read, write, and flush requests. It does this using a dedicated thread that executes an epoll(2)-based event loop and processes I/O using Linux AIO. This approach performs very well but can be used for raw image files only. The number of IOPS achieved has been reported to be several times higher than the existing virtio-blk implementation. Eventually it should be possible to unify virtio-blk-data-plane with the main body of QEMU code once the block layer and hardware emulation is able to run outside the global mutex. Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
2013-01-02dataplane: add virtqueue vring codeStefan Hajnoczi1-0/+3
The virtio-blk-data-plane cannot access memory using the usual QEMU functions since it executes outside the global mutex and the memory APIs are this time are not thread-safe. This patch introduces a virtqueue module based on the kernel's vhost vring code. The trick is that we map guest memory ahead of time and access it cheaply outside the global mutex. Once the hardware emulation code can execute outside the global mutex it will be possible to drop this code. Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
2012-12-17spice-qemu-char: add spiceport chardevMarc-André Lureau1-0/+1
Add a new spice chardev to allow arbitrary communication between the host and the Spice client via the spice server. Examples: This allows the Spice client to have a special port for the qemu monitor: ... -chardev spiceport,name=org.qemu.monitor,id=monitorport -mon chardev=monitorport v2: - remove support for chardev to chardev linking - conditionnaly compile with SPICE_SERVER_VERSION Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
2012-12-14pseries: Add tracepoints to the XICS interrupt controllerDavid Gibson1-0/+13
This patch adds tracing / debugging calls to the XICS interrupt controller implementation used on the pseries machine. Signed-off-by: Ben Herrenschmidt <benh@kernel.crashing.org> Signed-off-by: David Gibson <david@gibson.dropbear.id.au> Signed-off-by: Alexander Graf <agraf@suse.de>
2012-11-16usb-host: update tracingGerd Hoffmann1-1/+1
Now that we have separate status and length fields in USBPacket update the completion tracepoint to log both. Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
2012-11-16ehci: handle dma errorsGerd Hoffmann1-0/+1
Starting with commit 1c380f9460522f32c8dd2577b2a53d518ec91c6d dma transfers can actually fail. This patch makes ehci keep track of the busmaster bit in pci config space, by setting/clearing the dma_context pointer. Attempts to dma without context will result in raising HSE (Host System Error) interrupt and stopping the host controller. This patch fixes WinXP not booting with a usb stick attached to ehci. Root cause is seabios activating ehci so you can boot from the stick, and WinXP clearing the busmaster bit before resetting the host controller, leading to ehci actually trying dma while it is disabled. Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
2012-11-05hw/qxl: qxl_send_events: nop if stoppedAlon Levy1-0/+1
Added a trace point for easy logging. RHBZ: https://bugzilla.redhat.com/show_bug.cgi?id=870972 Signed-off-by: Alon Levy <alevy@redhat.com> Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
2012-11-01Merge remote-tracking branch 'kraxel/usb.69' into stagingAnthony Liguori1-0/+2
* kraxel/usb.69: (31 commits) usb-redir: Allow redirecting super speed devices to high speed controllers usb-redir: Allow to attach USB 2.0 devices to 1.1 host controller usb-redir: Use reject rather the disconnect on bad ep info usb-redir: Add an usbredir_setup_usb_eps() helper function usb-redir: Add support for input pipelining usb-redir: Add support for 32 bits bulk packet length combined-packet: Add a workaround for Linux usbfs + live migration usb: Add packet combining functions uhci: Don't crash on device disconnect uhci: Add a uhci_handle_td_error() helper function usb/ehci-pci: add helper to create ich9 usb controllers usb/ehci-pci: add ich9 00:1a.* variant usb/ehci-pci: dynamic type generation uhci: add ich9 00:1a.* variants uhci: stick irq routing info into UHCIInfo too. uhci: dynamic type generation xilinx_zynq: add USB controllers usb/ehci: add sysbus variant usb/ehci: split into multiple source files usb/ehci: Guard definition of EHCI_DEBUG ... Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2012-11-01xhci: add port trace pointsGerd Hoffmann1-0/+2
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
2012-10-31Merge remote-tracking branch 'origin/master' into threadpoolPaolo Bonzini1-1/+9
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2012-10-31aio: add generic thread-pool facilityPaolo Bonzini1-0/+5
Add a generic thread-pool. The code is roughly based on posix-aio-compat.c, with some changes, especially the following: - use QemuSemaphore instead of QemuCond; - separate the state of the thread from the return code of the worker function. The return code is totally opaque for the thread pool; - do not busy wait when doing cancellation. A more generic threadpool (but still specific to I/O so that in the future it can use special scheduling classes or PI mutexes) can have many uses: it allows more flexibility in raw-posix.c and can more easily be extended to Win32, and it will also be used to do an msync of the persistent bitmap. Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2012-10-29Merge remote-tracking branch 'kraxel/usb.68' into stagingAnthony Liguori1-1/+1
* kraxel/usb.68: (36 commits) xhci: fix usb name in caps xhci: make number of interrupters and slots configurable xhci: allow disabling interrupters xhci: flush endpoint context unconditinally xhci: fix function name in error message uhci: Use only one queue for ctrl endpoints uhci: Retry to fill the queue while waiting for td completion uhci: Always mark a queue valid when we encounter it uhci: When the guest marks a pending td non-active, cancel the queue uhci: Detect guest td re-use uhci: Verify queue has not been changed by guest uhci: Immediately free queues on device disconnect uhci: Store ep in UHCIQueue uhci: Make uhci_fill_queue() actually operate on an UHCIQueue uhci: Add uhci_read_td() helper function uhci: Rename UHCIAsync->td to UHCIAsync->td_addr uhci: Move emptying of the queue's asyncs' queue to uhci_queue_free uhci: Drop unnecessary forward declaration of some static functions uhci: Don't retry on error uhci: cleanup: Add an unlink call to uhci_async_cancel() ... Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2012-10-25uhci: Verify queue has not been changed by guestHans de Goede1-1/+1
According to the spec a guest can unlink a qh, and then as soon as frindex has changed by 1 since the unlink, assume it is idle and re-use it. However for various reasons, we cannot simply consider a qh as unlinked if we've not seen it for 1 frame. This means that it is possible for a guest to re-use / restart the queue while we still see its old state. This patch adds a safety check for this, and "early" retires queues when they were changed by the guest. Signed-off-by: Hans de Goede <hdegoede@redhat.com> Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
2012-10-24mirror: introduce mirror jobPaolo Bonzini1-0/+7
This patch adds the implementation of a new job that mirrors a disk to a new image while letting the guest continue using the old image. The target is treated as a "black box" and data is copied from the source to the target in the background. This can be used for several purposes, including storage migration, continuous replication, and observation of the guest I/O in an external program. It is also a first step in replacing the inefficient block migration code that is part of QEMU. The job is possibly never-ending, but it is logically structured into two phases: 1) copy all data as fast as possible until the target first gets in sync with the source; 2) keep target in sync and ensure that reopening to the target gets a correct (full) copy of the source data. The second phase is indicated by the progress in "info block-jobs" reporting the current offset to be equal to the length of the file. When the job is cancelled in the second phase, QEMU will run the job until the source is clean and quiescent, then it will report successful completion of the job. In other words, the BLOCK_JOB_CANCELLED event means that the target may _not_ be consistent with a past state of the source; the BLOCK_JOB_COMPLETED event means that the target is consistent with a past state of the source. (Note that it could already happen that management lost the race against QEMU and got a completion event instead of cancellation). It is not yet possible to complete the job and switch over to the target disk. The next patches will fix this and add many refinements to the basic idea introduced here. These include improved error management, some tunable knobs and performance optimizations. Signed-off-by: Paolo Bonzini <pbonzini@redhat.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2012-10-24block: add block-job-completePaolo Bonzini1-0/+1
While streaming can be dropped as soon as it progressed through the whole image, mirroring needs to be completed manually for two reasons: 1) so that management knows exactly when the VM switches to the target; 2) because for other use cases such as replication, we may leave the operation running for the whole life of the virtual machine. Add a new block job command that manually completes background operations. Signed-off-by: Paolo Bonzini <pbonzini@redhat.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2012-10-17ram: create trace event for migration sync bitmapJuan Quintela1-0/+4
Signed-off-by: Juan Quintela <quintela@redhat.com> Reviewed-by: Paolo Bonzini <pbonzini@redhat.com>
2012-09-28qmp: add block-job-pause and block-job-resumePaolo Bonzini1-0/+2
Add QMP commands matching the functionality. Paused jobs cannot be canceled without first resuming them. This ensures that I/O errors are never missed by management. However, an optional force argument can be specified to allow that. Signed-off-by: Paolo Bonzini <pbonzini@redhat.com> Reviewed-by: Eric Blake <eblake@redhat.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2012-09-28blockdev: rename block_stream_cb to a generic block_job_cbJeff Cody1-1/+1
Signed-off-by: Jeff Cody <jcody@redhat.com> Reviewed-by: Eric Blake <eblake@redhat.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2012-09-28block: add live block commit functionalityJeff Cody1-0/+2
This adds the live commit coroutine. This iteration focuses on the commit only below the active layer, and not the active layer itself. The behaviour is similar to block streaming; the sectors are walked through, and anything that exists above 'base' is committed back down into base. At the end, intermediate images are deleted, and the chain stitched together. Images are restored to their original open flags upon completion. Signed-off-by: Jeff Cody <jcody@redhat.com> Reviewed-by: Eric Blake <eblake@redhat.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2012-09-21Merge branch 'usb.65' of git://git.kraxel.org/qemuAurelien Jarno1-3/+6
* 'usb.65' of git://git.kraxel.org/qemu: uhci: Don't queue up packets after one with the SPD flag set usb-redir: Revert usb-redir part of commit 93bfef4c usb-redir: Add chardev open / close debug logging usb-redir: Add support for migration usb-redir: Store max_packet_size in endp_data usb-redir: Add an already_in_flight packet-id queue usb-redir: Change cancelled packet code into a generic packet-id queue ehci: Walk async schedule before and after migration ehci: Don't set seen to 0 when removing unseen queue-heads configure: usbredir fixes ehci: Don't process too much frames in 1 timer tick (v2) ehci: Fix interrupts stopping when Interrupt Threshold Control is 8 ehci: switch to new-style memory ops usb-host: allow emulated (non-async) control requests without USBPacket
2012-09-13hw/qxl: support client monitor configuration via deviceAlon Levy1-1/+5
Until now we used only the agent to change the monitor count and each monitor resolution. This patch introduces the qemu part of using the device as the mediator instead of the agent via virtio-serial. Spice (>=0.11.5) calls the new QXLInterface::client_monitors_config, which returns wether the interrupt is enabled, and if so and given a non NULL monitors config will generate an interrupt QXL_INTERRUPT_CLIENT_MONITORS_CONFIG with crc checksum for the guest to verify a second call hasn't interfered. The maximal number of monitors is limited on the QXLRom to 64. Signed-off-by: Alon Levy <alevy@redhat.com> Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
2012-09-13qxl: add trace-event for QXL_IO_LOGAlon Levy1-0/+1
Signed-off-by: Alon Levy <alevy@redhat.com> Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
2012-09-13hw/qxl: tracing fixesAlon Levy1-2/+4
Add two new trace events: qxl_send_events(int qid, uint32_t events) "%d %d" qxl_set_guest_bug(int qid) "%d" Change qxl_io_unexpected_vga_mode parameters to be equivalent to those of qxl_io_write for easier grouping under a single systemtap probe. Change d to qxl in one place. Signed-off-by: Alon Levy <alevy@redhat.com> Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
2012-09-12ehci: switch to new-style memory opsGerd Hoffmann1-3/+6
Also register different memory regions for capabilities, operational registers and port status registers. Create separate tracepoints for operational regs and port status regs. Ditch a bunch of sanity checks because the memory core will do this for us now. Offloading the byte, word and dword access handling to the memory core also has the side effect of fixing ehci register access on bigendian hosts. Cc: David Gibson <david@gibson.dropbear.id.au> Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
2012-09-11xhci: add XHCIInterrupterGerd Hoffmann1-1/+1
Move all state belonging to the (single) interrupter into a separate struct. First step in adding support for multiple interrupters. Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
2012-09-11xhci: add msix supportGerd Hoffmann1-0/+3
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
2012-09-11usb3: bos decriptorGerd Hoffmann1-0/+1
Add support for creating BOS descriptor and device cappability descriptors. Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
2012-09-11xhci: add trace_usb_xhci_ep_set_dequeueGerd Hoffmann1-0/+1
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
2012-09-11xhci: trace cc codes in cleartextGerd Hoffmann1-1/+1
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
2012-09-11xhci: drop bufferingGerd Hoffmann1-1/+1
This patch splits the xhci_xfer_data function into three. The xhci_xfer_data function used to do does two things: (1) copy transfer data between guest memory and a temporary buffer. (2) report transfer results to the guest using events. Now we three functions to handle this: (1) xhci_xfer_map creates a scatter list for the transfer and uses that (instead of the temporary buffer) to build a USBPacket. (2) xhci_xfer_unmap undoes the mapping. (3) xhci_xfer_report sends out events. The patch also fixes reporting of transaction errors which must be reported unconditinally, not only in case the guest asks for it using the ISP flag. [ v2: fix warning ] Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
2012-09-11ehci: add doorbell trace eventsGerd Hoffmann1-0/+2
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
2012-09-11ehci: trace guest bugsGerd Hoffmann1-0/+1
make qemu_queue_{cancel,reset} return the number of packets released, so the caller can figure whenever there have been active packets even though there shouldn't have been any. Add tracepoint to log this. Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
2012-09-05qxl: add QXL_IO_MONITORS_CONFIG_ASYNCAlon Levy1-0/+1
Revision bumped to 4 for new IO support, enabled for spice-server >= 0.11.1. New io enabled if revision is 4. Revision can be set to 4. [ kraxel: 3 continues to be the default revision. Once we have a new stable spice-server release and the qemu patches to enable the new bits merged we'll go flip the switch and make rev4 the default ] This io calls the corresponding new spice api spice_qxl_monitors_config_async to let spice-server read a new guest set monitors config and notify the client. On migration reissue spice_qxl_monitors_config_async. RHBZ: 770842 Signed-off-by: Alon Levy <alevy@redhat.com> Signed-off-by: Gerd Hoffmann <kraxel@redhat.com> fixup Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
2012-08-15prep: Add pc87312 Super I/O emulationHervé Poussineau1-0/+8
This provides floppy and IDE controllers as well as serial and parallel ports. However, dynamic configuration of devices is not yet supported. Signed-off-by: Hervé Poussineau <hpoussin@reactos.org> [AF: QOM'ify, split out header, create CharDriverState if absent] Signed-off-by: Andreas Färber <andreas.faerber@web.de>
2012-08-15pseries: Add PCI MSI/MSI-X supportAlexey Kardashevskiy1-0/+5
This patch implements MSI and MSI-X support for the pseries PCI host bridge. To do this it adds: * A "config_space_address to msi_table" map, since the MSI RTAS calls take a PCI config space address as an identifier. * A MSIX memory region to catch msi_notify()/msix_notiry() from virtio-pci and pass them to the guest via qemu_irq_pulse(). * RTAS call "ibm,change-msi" which sets up MSI vectors for a device. Note that this call may configure and return lesser number of vectors than requested. * RTAS call "ibm,query-interrupt-source-number" which translates MSI vector to interrupt controller (XICS) IRQ number. Signed-off-by: Alexey Kardashevskiy <aik@ozlabs.ru> Signed-off-by: David Gibson <david@gibson.dropbear.id.au> [agraf: fix error case ndev < 0] Signed-off-by: Alexander Graf <agraf@suse.de>
2012-08-15pseries: Add trace event for PCI irqsAlexey Kardashevskiy1-0/+3
This adds a trace event in the pseries PCI specific set_irq() function to assist in debugging. Signed-off-by: Alexey Kardashevskiy <aik@ozlabs.ru> Signed-off-by: David Gibson <david@gibson.dropbear.id.au> [agraf: add trace.h include] Signed-off-by: Alexander Graf <agraf@suse.de>
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