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2014-09-05console: add qemu_pixelformat_from_pixmanGerd Hoffmann
Function to convert pixman format codes to qemu PixelFormat. [ Benjamin Herrenschmidt: fix BGRA+RGBA shifts ] Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
2014-09-04Merge remote-tracking branch 'remotes/afaerber/tags/qom-devices-for-peter' ↵Peter Maydell
into staging QOM infrastructure fixes and device conversions * Cleanups for recursive device unrealization # gpg: Signature made Thu 04 Sep 2014 18:17:35 BST using RSA key ID 3E7E013F # gpg: Good signature from "Andreas Färber <afaerber@suse.de>" # gpg: aka "Andreas Färber <afaerber@suse.com>" * remotes/afaerber/tags/qom-devices-for-peter: qdev: Add cleanup logic in device_set_realized() to avoid resource leak qdev: Use NULL instead of local_err for qbus_child unrealize qdev: Use error_abort instead of using local_err memory: Remove object_property_add_child_array() qom: Add automatic arrayification to object_property_add() machine: Clean up -machine handling qom: Make object_child_foreach() safe for objects removal Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
2014-09-04Merge remote-tracking branch 'remotes/kvaneesh/for-upstream' into stagingPeter Maydell
* remotes/kvaneesh/for-upstream: hw/9pfs: Don't return type from host in readdir on local 9p filesystem hw/9pfs: Use little-endian format for xattr values Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
2014-09-04qdev: Add cleanup logic in device_set_realized() to avoid resource leakGonglei
At present, this function doesn't have partial cleanup implemented, which will cause resource leaks in some scenarios. Example: 1. Assume that "dc->realize(dev, &local_err)" executes successful and local_err == NULL; 2. device hotplug in hotplug_handler_plug() executes but fails (it is prone to occur). Then local_err != NULL; 3. error_propagate(errp, local_err) and return. But the resources which have been allocated in dc->realize() will be leaked. Simple backtrace: dc->realize() |->device_realize |->pci_qdev_init() |->do_pci_register_device() |->etc. Add fuller cleanup logic which assures that function can goto appropriate error label as local_err population is detected at each relevant point. Signed-off-by: Gonglei <arei.gonglei@huawei.com> Reviewed-by: Peter Crosthwaite <peter.crosthwaite@xilinx.com> Cc: qemu-stable@nongnu.org Signed-off-by: Andreas Färber <afaerber@suse.de>
2014-09-04qdev: Use NULL instead of local_err for qbus_child unrealizeGonglei
Forcefully unrealize all children regardless of errors in earlier iterations (if any). We should keep going with cleanup operation rather than report an error immediately. Therefore store the first child unrealization failure and propagate it at the end. We also forcefully unregister vmsd and unrealize actual object, too. Signed-off-by: Gonglei <arei.gonglei@huawei.com> Reviewed-by: Peter Crosthwaite <peter.crosthwaite@xilinx.com> Cc: qemu-stable@nongnu.org Signed-off-by: Andreas Färber <afaerber@suse.de>
2014-09-04Merge remote-tracking branch 'remotes/stefanha/tags/net-pull-request' into ↵Peter Maydell
staging Net patches # gpg: Signature made Thu 04 Sep 2014 17:32:44 BST using RSA key ID 81AB73C8 # gpg: Good signature from "Stefan Hajnoczi <stefanha@redhat.com>" # gpg: aka "Stefan Hajnoczi <stefanha@gmail.com>" * remotes/stefanha/tags/net-pull-request: virtio-net: purge outstanding packets when starting vhost net: complete all queued packets on VM stop net: invoke callback when purging queue virtio: don't call device on !vm_running virtio-net: don't run bh on vm stopped net: Forbid dealing with packets when VM is not running Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
2014-09-04virtio-net: purge outstanding packets when starting vhostMichael S. Tsirkin
whenever we start vhost, virtio could have outstanding packets queued, when they complete later we'll modify the ring while vhost is processing it. To prevent this, purge outstanding packets on vhost start. Cc: qemu-stable@nongnu.org Cc: Jason Wang <jasowang@redhat.com> Signed-off-by: Michael S. Tsirkin <mst@redhat.com> Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
2014-09-04net: complete all queued packets on VM stopMichael S. Tsirkin
This completes all packets, ensuring that callbacks will not run when VM is stopped. Cc: qemu-stable@nongnu.org Cc: Jason Wang <jasowang@redhat.com> Signed-off-by: Michael S. Tsirkin <mst@redhat.com> Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
2014-09-04net: invoke callback when purging queueMichael S. Tsirkin
devices rely on packet callbacks eventually running, but we violate this rule whenever we purge the queue. To fix, invoke callbacks on all packets on purge. Set length to 0, this way callers can detect that this happened and re-queue if necessary. Cc: qemu-stable@nongnu.org Cc: Jason Wang <jasowang@redhat.com> Signed-off-by: Michael S. Tsirkin <mst@redhat.com> Acked-by: Jason Wang <jasowang@redhat.com> Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
2014-09-04virtio: don't call device on !vm_runningMichael S. Tsirkin
On vm stop, virtio changes vm_running state too soon, so callbacks can get envoked with vm_running = false; Cc: qemu-stable@nongnu.org Cc: Jason Wang <jasowang@redhat.com> Signed-off-by: Michael S. Tsirkin <mst@redhat.com> Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
2014-09-04virtio-net: don't run bh on vm stoppedMichael S. Tsirkin
commit 783e7706937fe15523b609b545587a028a2bdd03 virtio-net: stop/start bh when appropriate is incomplete: BH might execute within the same main loop iteration but after vmstop, so in theory, we might trigger an assertion. I was unable to reproduce this in practice, but it seems clear enough that the potential is there, so worth fixing. Cc: qemu-stable@nongnu.org Reported-by: Stefan Hajnoczi <stefanha@redhat.com> Signed-off-by: Michael S. Tsirkin <mst@redhat.com> Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
2014-09-04hw/9pfs: Don't return type from host in readdir on local 9p filesystemBastian Blank
When using mapped mode in 9pfs, readdir implementation should not return file type in d_type from the host readdir, instead, it should use the type stored in the extended attributes. Since d_type is optional and reading ext attrs for every readdir is expensive, it should be sufficient to just set d_type to DT_UNKNOWN, so guest will know to look it up separately. This is a -stable material. Signed-off-by: Bastian Blank <waldi@debian.org> Signed-off-by: Michael Tokarev <mjt@tls.msk.ru> Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
2014-09-04qdev: Use error_abort instead of using local_errGonglei
This error can not happen normally. If it happens, it indicates something very wrong, we should abort QEMU. Moreover, the user can only refer to /machine/peripheral or /objects, not /machine/unattached. While at it, remove superfluous check about local_err. Signed-off-by: Gonglei <arei.gonglei@huawei.com> Reviewed-by: Peter Crosthwaite <peter.crosthwaite@xilinx.com> Signed-off-by: Andreas Färber <afaerber@suse.de>
2014-09-04memory: Remove object_property_add_child_array()Peter Crosthwaite
Obsoleted by automatic object_property_add() arrayification. Reviewed-by: Paolo Bonzini <pbonzini@redhat.com> Signed-off-by: Peter Crosthwaite <peter.crosthwaite@xilinx.com> Signed-off-by: Andreas Färber <afaerber@suse.de>
2014-09-04qom: Add automatic arrayification to object_property_add()Peter Crosthwaite
If "[*]" is given as the last part of a QOM property name, treat that as an array property. The added property is given the first available name, replacing the * with a decimal number counting from 0. First add with name "foo[*]" will be "foo[0]". Second "foo[1]" and so on. Callers may inspect the ObjectProperty * return value to see what number the added property was given. Signed-off-by: Peter Crosthwaite <peter.crosthwaite@xilinx.com> Signed-off-by: Andreas Färber <afaerber@suse.de>
2014-09-04machine: Clean up -machine handlingAndreas Färber
Since commit c4090f8, -object options are no longer handled through object_set_property(), so clean up -object leftovers by renaming the function and dropping special-casing of qom-type and id properties. Cc: Paolo Bonzini <pbonzini@redhat.com> Reviewed-by: Marcel Apfelbaum <marcel.a@redhat.com> Signed-off-by: Andreas Färber <afaerber@suse.de>
2014-09-04qom: Make object_child_foreach() safe for objects removalAlexey Kardashevskiy
Current object_child_foreach() uses QTAILQ_FOREACH() to walk through children and that makes children removal from the callback impossible. This makes object_child_foreach() use QTAILQ_FOREACH_SAFE(). Signed-off-by: Alexey Kardashevskiy <aik@ozlabs.ru> Reviewed-by: Hu Tao <hutao@cn.fujitsu.com> Signed-off-by: Andreas Färber <afaerber@suse.de>
2014-09-04net: Forbid dealing with packets when VM is not runningzhanghailiang
For all NICs(except virtio-net) emulated by qemu, Such as e1000, rtl8139, pcnet and ne2k_pci, Qemu can still receive packets when VM is not running. If this happened in *migration's* last PAUSE VM stage, but before the end of the migration, the new receiving packets will possibly dirty parts of RAM which has been cached in *iovec*(will be sent asynchronously) and dirty parts of new RAM which will be missed. This will lead serious network fault in VM. To avoid this, we forbid receiving packets in generic net code when VM is not running. Bug reproduction steps: (1) Start a VM which configured at least one NIC (2) In VM, open several Terminal and do *Ping IP -i 0.1* (3) Migrate the VM repeatedly between two Hosts And the *PING* command in VM will very likely fail with message: 'Destination HOST Unreachable', the NIC in VM will stay unavailable unless you run 'service network restart' Signed-off-by: zhanghailiang <zhang.zhanghailiang@huawei.com> Reviewed-by: Jason Wang <jasowang@redhat.com> Reviewed-by: Juan Quintela <quintela@redhat.com> Reviewed-by: Michael S. Tsirkin <mst@redhat.com> Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
2014-09-04Merge remote-tracking branch 'remotes/mjt/tags/trivial-patches-2014-09-03' ↵Peter Maydell
into staging trivial patches for 2014-09-03 # gpg: Signature made Wed 03 Sep 2014 06:53:42 BST using RSA key ID A4C3D7DB # gpg: Good signature from "Michael Tokarev <mjt@tls.msk.ru>" # gpg: aka "Michael Tokarev <mjt@corpit.ru>" # gpg: aka "Michael Tokarev <mjt@debian.org>" # 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: 6EE1 95D1 886E 8FFB 810D 4324 457C E0A0 8044 65C5 # Subkey fingerprint: 6F67 E18E 7C91 C5B1 5514 66A7 BEE5 9D74 A4C3 D7DB * remotes/mjt/tags/trivial-patches-2014-09-03: slirp: Honour vlan/stack in hostfwd_remove commands hmp: fix MemdevList memory leak qom/object.c, hmp.c: fix string_output_get_string() memory leak query-memdev: fix potential memory leaks MAINTAINERS: Add VMWare devices maintainer device_tree.c: dump all err mesages with error_report device_tree.c: redirect load_device_tree err message to stderr scripts: Remove scripts/qtest Fix debug print warning curl: The macro that you have to uncomment to get debugging is DEBUG_CURL. Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
2014-09-04Merge remote-tracking branch 'remotes/mst/tags/for_upstream' into stagingPeter Maydell
pci, pc fixes, features A bunch of bugfixes - these will make sense for 2.1.1 Initial Intel IOMMU support. Signed-off-by: Michael S. Tsirkin <mst@redhat.com> # gpg: Signature made Wed 03 Sep 2014 14:41:23 BST using RSA key ID D28D5469 # gpg: Good signature from "Michael S. Tsirkin <mst@kernel.org>" # gpg: aka "Michael S. Tsirkin <mst@redhat.com>" * remotes/mst/tags/for_upstream: acpi-build: Set FORCE_APIC_CLUSTER_MODEL bit for FADT flags vhost-scsi: init backend features earlier vhost_net: init acked_features to backend_features vhost_net: start/stop guest notifiers properly Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
2014-09-04Revert "vhost_net: start/stop guest notifiers properly"Peter Maydell
This reverts commit aad4dce934649b3a398396fc2a76f215bb194ea4. I accidentally merged the wrong version of a pull request which had a buggy version of this patch. Reverting the buggy version means we can then cleanly merge in the correct pull with the corrected change. Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
2014-09-03acpi-build: Set FORCE_APIC_CLUSTER_MODEL bit for FADT flagszhanghailiang
If we start Windows 2008 R2 DataCenter with number of cpu less than 8, The system will use APIC Flat Logical destination mode as default configuration, Which has an upper limit of 8 CPUs. The fault is that VM can not show all processors within Task Manager if we hot-add cpus when the number of cpus in VM extends the limit of 8. If we use cluster destination model, the problem will be solved. Note: This flag was introduced later than ACPI v1.0 specification while QEMU generates v1.0 tables only, but... linux kernel ignores this flag, so patch has no influence on it. Tested with Win[XPsp3|Srv2003EE|Srv2008DC|Srv2008R2|Srv2012R2], there isn't BSODs and guests boot just fine. In cases guest doesn't support cpu-hotplug, cpu becomes visible after reboot and in case the guest supports cpu-hotplug, it works as expected with this patch. Cc: qemu-stable@nongnu.org Signed-off-by: huangzhichao <huangzhichao@huawei.com> Signed-off-by: zhanghailiang <zhang.zhanghailiang@huawei.com> Reviewed-by: Michael S. Tsirkin <mst@redhat.com> Signed-off-by: Michael S. Tsirkin <mst@redhat.com> Reviewed-By: Igor Mammedov <imammedo@redhat.com>
2014-09-03vhost-scsi: init backend features earlierMichael S. Tsirkin
As vhost core can use backend_features during init, clear it earlier to avoid using uninitialized memory. This use would be harmless since vhost scsi ignores the result anyway, but initializing earlier will help prevent valgrind errors, and make scsi and net behave similarly. Cc: qemu-stable@nongnu.org Acked-by: Paolo Bonzini <pbonzini@redhat.com> Acked-by: Jason Wang <jasowang@redhat.com> Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
2014-09-03vhost_net: init acked_features to backend_featuresJason Wang
commit 2e6d46d77ed328d34a94688da8371bcbe243479b (vhost: add vhost_get_features and vhost_ack_features) removes the step that initializes the acked_features to backend_features. As this field is now uninitialized, vhost initialization will sometimes fail. To fix, initialize acked_features on each ack. Tested-by: Andrey Korolyov <andrey@xdel.ru> Cc: Nikolay Nikolaev <n.nikolaev@virtualopensystems.com> Cc: qemu-stable@nongnu.org Signed-off-by: Jason Wang <jasowang@redhat.com> Reviewed-by: Michael S. Tsirkin <mst@redhat.com> Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
2014-09-03vhost_net: start/stop guest notifiers properlyJason Wang
commit a9f98bb5ebe6fb1869321dcc58e72041ae626ad8 "vhost: multiqueue support" changed the order of stopping the device. Previously vhost_dev_stop would disable backend and only afterwards, unset guest notifiers. We now unset guest notifiers while vhost is still active. This can lose interrupts causing guest networking to fail. In particular, this has been observed during migration. To fix this, several other changes are needed: - remove the hdev->started assertion in vhost.c since we may want to start the guest notifiers before vhost starts and stop the guest notifiers after vhost is stopped. - introduce the vhost_net_set_vq_index() and call it before setting guest notifiers. This is to guarantee vhost_net has the correct virtqueue index when setting guest notifiers. MST: fix up error handling. Cc: qemu-stable@nongnu.org Cc: Jason Wang <jasowang@redhat.com> Signed-off-by: Michael S. Tsirkin <mst@redhat.com> Tested-by: Andrey Korolyov <andrey@xdel.ru> Reported-by: "Zhangjie (HZ)" <zhangjie14@huawei.com> Tested-by: William Dauchy <william@gandi.net> Signed-off-by: Jason Wang <jasowang@redhat.com> Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
2014-09-02hw/9pfs: Use little-endian format for xattr valuesAneesh Kumar K.V
With security_model=mapped-xattr, we encode the uid,gid and other file attributes as extended attributes of the file. We save them under user.virtfs.* namespace. Use little-endian encoding for on-disk values. This enables us to export the same directory from both little-endian and big-endian hosts. NOTE: This will break big-endian host that have virtFS exports using security model mapped-xattr. They will have to use external tools to convert the xattr to little-endian format. Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
2014-09-02slirp: Honour vlan/stack in hostfwd_remove commandsPeter Maydell
The hostfwd_add and hostfwd_remove monitor commands allow the user to optionally specify a vlan/stack tuple. hostfwd_add honours this, but hostfwd_remove does not (it looks up the tuple but then ignores the SlirpState it has looked up and always uses the first stack in the list anyway). Correct this to honour what the user requested. Signed-off-by: Peter Maydell <peter.maydell@linaro.org> Signed-off-by: Michael Tokarev <mjt@tls.msk.ru>
2014-09-02hmp: fix MemdevList memory leakChen Fan
the memdev_list in hmp_info_memdev() is never freed. so we use existent method qapi_free_MemdevList() to free it. and also we can use qapi_free_MemdevList() to replace list loops to clean up the memdev list in error path. Signed-off-by: Chen Fan <chen.fan.fnst@cn.fujitsu.com> Reviewed-by: Peter Crosthwaite <peter.crosthwaite@xilinx.com> Reviewed-by: Hu Tao <hutao@cn.fujitsu.com> Signed-off-by: Michael Tokarev <mjt@tls.msk.ru>
2014-09-02qom/object.c, hmp.c: fix string_output_get_string() memory leakChen Fan
string_output_get_string() uses g_string_free(str, false) to transfer the 'str' pointer to callers and never free it. Signed-off-by: Chen Fan <chen.fan.fnst@cn.fujitsu.com> Reviewed-by: Peter Crosthwaite <peter.crosthwaite@xilinx.com> Reviewed-by: Hu Tao <hutao@cn.fujitsu.com> Signed-off-by: Michael Tokarev <mjt@tls.msk.ru>
2014-09-02query-memdev: fix potential memory leaksChen Fan
Signed-off-by: Chen Fan <chen.fan.fnst@cn.fujitsu.com> Reviewed-by: Peter Crosthwaite <peter.crosthwaite@xilinx.com> Reviewed-by: Hu Tao <hutao@cn.fujitsu.com> Signed-off-by: Michael Tokarev <mjt@tls.msk.ru>
2014-09-02MAINTAINERS: Add VMWare devices maintainerDmitry Fleytman
Signed-off-by: Dmitry Fleytman <dmitry@daynix.com> Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com> Signed-off-by: Michael Tokarev <mjt@tls.msk.ru>
2014-09-02device_tree.c: dump all err mesages with error_reportLi Liu
Signed-off-by: Li Liu <john.liuli@huawei.com> Signed-off-by: Michael Tokarev <mjt@tls.msk.ru>
2014-09-02device_tree.c: redirect load_device_tree err message to stderrLi Liu
Reviewed-by: Peter Crosthwaite <peter.crosthwaite@xilinx.com> Signed-off-by: Li Liu <john.liuli@huawei.com> Signed-off-by: Michael Tokarev <mjt@tls.msk.ru>
2014-09-02scripts: Remove scripts/qtestFam Zheng
This is a dummy file with no user, drop it. Signed-off-by: Fam Zheng <famz@redhat.com> Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com> Signed-off-by: Michael Tokarev <mjt@tls.msk.ru>
2014-09-02Fix debug print warningGonglei
Steps: 1.enable qemu debug print, using simply scprit as below: grep "//#define DEBUG" * -rl | xargs sed -i "s/\/\/#define DEBUG/#define DEBUG/g" 2. make -j 3. get some warning: hw/i2c/pm_smbus.c: In function 'smb_ioport_writeb': hw/i2c/pm_smbus.c:142: warning: format '%04x' expects type 'unsigned int', but argument 2 has type 'hwaddr' hw/i2c/pm_smbus.c:142: warning: format '%02x' expects type 'unsigned int', but argument 3 has type 'uint64_t' hw/i2c/pm_smbus.c: In function 'smb_ioport_readb': hw/i2c/pm_smbus.c:209: warning: format '%04x' expects type 'unsigned int', but argument 2 has type 'hwaddr' hw/intc/i8259.c: In function 'pic_ioport_read': hw/intc/i8259.c:373: warning: format '%02x' expects type 'unsigned int', but argument 2 has type 'hwaddr' hw/input/pckbd.c: In function 'kbd_write_command': hw/input/pckbd.c:232: warning: format '%02x' expects type 'unsigned int', but argument 2 has type 'uint64_t' hw/input/pckbd.c: In function 'kbd_write_data': hw/input/pckbd.c:333: warning: format '%02x' expects type 'unsigned int', but argument 2 has type 'uint64_t' hw/isa/apm.c: In function 'apm_ioport_writeb': hw/isa/apm.c:44: warning: format '%x' expects type 'unsigned int', but argument 2 has type 'hwaddr' hw/isa/apm.c:44: warning: format '%02x' expects type 'unsigned int', but argument 3 has type 'uint64_t' hw/isa/apm.c: In function 'apm_ioport_readb': hw/isa/apm.c:67: warning: format '%x' expects type 'unsigned int', but argument 2 has type 'hwaddr' hw/timer/mc146818rtc.c: In function 'cmos_ioport_write': hw/timer/mc146818rtc.c:394: warning: format '%02x' expects type 'unsigned int', but argument 3 has type 'uint64_t' hw/i386/pc.c: In function 'port92_write': hw/i386/pc.c:479: warning: format '%02x' expects type 'unsigned int', but argument 2 has type 'uint64_t' Fix them. Cc: qemu-trivial@nongnu.org Signed-off-by: Gonglei <arei.gonglei@huawei.com> Signed-off-by: Michael Tokarev <mjt@tls.msk.ru>
2014-09-02curl: The macro that you have to uncomment to get debugging is DEBUG_CURL.Richard W.M. Jones
Signed-off-by: Richard W.M. Jones <rjones@redhat.com> Signed-off-by: Michael Tokarev <mjt@tls.msk.ru>
2014-09-02Merge remote-tracking branch 'remotes/mst/tags/for_upstream' into stagingPeter Maydell
pci, pc fixes, features A bunch of bugfixes - these will make sense for 2.1.1 Initial Intel IOMMU support. Signed-off-by: Michael S. Tsirkin <mst@redhat.com> # gpg: Signature made Tue 02 Sep 2014 16:05:04 BST using RSA key ID D28D5469 # gpg: Good signature from "Michael S. Tsirkin <mst@kernel.org>" # gpg: aka "Michael S. Tsirkin <mst@redhat.com>" * remotes/mst/tags/for_upstream: vhost_net: start/stop guest notifiers properly pci: avoid losing config updates to MSI/MSIX cap regs virtio-net: don't run bh on vm stopped ioh3420: remove unused ioh3420_init() declaration vhost_net: cleanup start/stop condition intel-iommu: add IOTLB using hash table intel-iommu: add context-cache to cache context-entry intel-iommu: add supports for queued invalidation interface intel-iommu: fix coding style issues around in q35.c and machine.c intel-iommu: add Intel IOMMU emulation to q35 and add a machine option "iommu" as a switch intel-iommu: add DMAR table to ACPI tables intel-iommu: introduce Intel IOMMU (VT-d) emulation iommu: add is_write as a parameter to the translate function of MemoryRegionIOMMUOps Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
2014-09-02vhost_net: start/stop guest notifiers properlyJason Wang
commit a9f98bb5ebe6fb1869321dcc58e72041ae626ad8 vhost: multiqueue support changed the order of stopping the device. Previously vhost_dev_stop would disable backend and only afterwards, unset guest notifiers. We now unset guest notifiers while vhost is still active. This can lose interrupts causing guest networking to fail. In particular, this has been observed during migration. To adapt this, several other changes are needed: - remove the hdev->started assertion in vhost.c since we may want to start the guest notifiers before vhost starts and stop the guest notifiers after vhost is stopped. - introduce the vhost_net_set_vq_index() and call it before setting guest notifiers. This is used to guarantee vhost_net has the correct virtqueue index when setting guest notifiers. Cc: qemu-stable@nongnu.org Reported-by: "Zhangjie (HZ)" <zhangjie14@huawei.com> Tested-by: William Dauchy <wdauchy@gmail.com> Signed-off-by: Michael S. Tsirkin <mst@redhat.com> Signed-off-by: Jason Wang <jasowang@redhat.com> Reviewed-by: Michael S. Tsirkin <mst@redhat.com> Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
2014-09-02pci: avoid losing config updates to MSI/MSIX cap regsKnut Omang
Since commit 95d658002401e2e47a5404298ebe9508846e8a39 msi: Invoke msi/msix_write_config from PCI core msix config writes are lost, the value written is always 0. Fix pci_default_write_config to avoid this. Cc: qemu-stable@nongnu.org Signed-off-by: Knut Omang <knut.omang@oracle.com> Reviewed-by: Michael S. Tsirkin <mst@redhat.com> Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
2014-09-02virtio-net: don't run bh on vm stoppedMichael S. Tsirkin
commit 783e7706937fe15523b609b545587a028a2bdd03 virtio-net: stop/start bh when appropriate is incomplete: BH might execute within the same main loop iteration but after vmstop, so in theory, we might trigger an assertion. I was unable to reproduce this in practice, but it seems clear enough that the potential is there, so worth fixing. Cc: qemu-stable@nongnu.org Reported-by: Stefan Hajnoczi <stefanha@redhat.com> Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
2014-09-02ioh3420: remove unused ioh3420_init() declarationGonglei
commit 0f9b1771ccc65873a8376c81200a437aa58c2f6d ioh3420: Remove obsoleted, unused ioh3420_init function removed the implementation of ioh3420_init Drop the declaration from the header file as well. Signed-off-by: Gonglei <arei.gonglei@huawei.com> Reviewed-by: Knut Omang <knut.omang@oracle.com> Reviewed-by: Michael S. Tsirkin <mst@redhat.com> Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
2014-09-02vhost_net: cleanup start/stop conditionMichael S. Tsirkin
Checking vhost device internal state in vhost_net looks like a layering violation since vhost_net does not set this flag: it is set and tested by vhost.c. There seems to be no reason to check this: caller in virtio net uses its own flag, vhost_started, to ensure vhost is started/stopped as appropriate. Signed-off-by: Michael S. Tsirkin <mst@redhat.com> Reviewed-by: Amos Kong <akong@redhat.com>
2014-09-02Merge remote-tracking branch 'remotes/spice/tags/pull-spice-20140902-1' into ↵Peter Maydell
staging sanity check for qxl, minor spice display channel tweak. # gpg: Signature made Tue 02 Sep 2014 09:53:39 BST using RSA key ID D3E87138 # gpg: Good signature from "Gerd Hoffmann (work) <kraxel@redhat.com>" # gpg: aka "Gerd Hoffmann <gerd@kraxel.org>" # gpg: aka "Gerd Hoffmann (private) <kraxel@gmail.com>" * remotes/spice/tags/pull-spice-20140902-1: spice: use console index as display id qxl-render: add more sanity checks Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
2014-09-01implementing victim TLB for QEMU system emulated TLBXin Tong
QEMU system mode page table walks are expensive. Taken by running QEMU qemu-system-x86_64 system mode on Intel PIN , a TLB miss and walking a 4-level page tables in guest Linux OS takes ~450 X86 instructions on average. QEMU system mode TLB is implemented using a directly-mapped hashtable. This structure suffers from conflict misses. Increasing the associativity of the TLB may not be the solution to conflict misses as all the ways may have to be walked in serial. A victim TLB is a TLB used to hold translations evicted from the primary TLB upon replacement. The victim TLB lies between the main TLB and its refill path. Victim TLB is of greater associativity (fully associative in this patch). It takes longer to lookup the victim TLB, but its likely better than a full page table walk. The memory translation path is changed as follows : Before Victim TLB: 1. Inline TLB lookup 2. Exit code cache on TLB miss. 3. Check for unaligned, IO accesses 4. TLB refill. 5. Do the memory access. 6. Return to code cache. After Victim TLB: 1. Inline TLB lookup 2. Exit code cache on TLB miss. 3. Check for unaligned, IO accesses 4. Victim TLB lookup. 5. If victim TLB misses, TLB refill 6. Do the memory access. 7. Return to code cache The advantage is that victim TLB can offer more associativity to a directly mapped TLB and thus potentially fewer page table walks while still keeping the time taken to flush within reasonable limits. However, placing a victim TLB before the refill path increase TLB refill path as the victim TLB is consulted before the TLB refill. The performance results demonstrate that the pros outweigh the cons. some performance results taken on SPECINT2006 train datasets and kernel boot and qemu configure script on an Intel(R) Xeon(R) CPU E5620 @ 2.40GHz Linux machine are shown in the Google Doc link below. https://docs.google.com/spreadsheets/d/1eiItzekZwNQOal_h-5iJmC4tMDi051m9qidi5_nwvH4/edit?usp=sharing In summary, victim TLB improves the performance of qemu-system-x86_64 by 11% on average on SPECINT2006, kernelboot and qemu configscript and with highest improvement of in 26% in 456.hmmer. And victim TLB does not result in any performance degradation in any of the measured benchmarks. Furthermore, the implemented victim TLB is architecture independent and is expected to benefit other architectures in QEMU as well. Although there are measurement fluctuations, the performance improvement is very significant and by no means in the range of noises. Signed-off-by: Xin Tong <trent.tong@gmail.com> Message-id: 1407202523-23553-1-git-send-email-trent.tong@gmail.com Reviewed-by: Peter Maydell <peter.maydell@linaro.org> Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
2014-09-01target-tricore: Add instructions of SR opcode formatBastian Koppelmann
Add instructions of SR opcode format. Add micro-op generator functions for saturate. Add helper return from exception (rfe). Signed-off-by: Bastian Koppelmann <kbastian@mail.uni-paderborn.de> Message-id: 1409572800-4116-16-git-send-email-kbastian@mail.uni-paderborn.de Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
2014-09-01target-tricore: Add instructions of SLR, SSRO and SRO opcode formatBastian Koppelmann
Add instructions of SLR, SSRO and SRO opcode format. Signed-off-by: Bastian Koppelmann <kbastian@mail.uni-paderborn.de> Reviewed-by: Richard Henderson <rth@twiddle.net> Message-id: 1409572800-4116-15-git-send-email-kbastian@mail.uni-paderborn.de Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
2014-09-01target-tricore: Add instructions of SC opcode formatBastian Koppelmann
Add instructions of SC opcode format. Add helper for begin interrupt service routine. Signed-off-by: Bastian Koppelmann <kbastian@mail.uni-paderborn.de> Message-id: 1409572800-4116-14-git-send-email-kbastian@mail.uni-paderborn.de Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
2014-09-01target-tricore: Add instructions of SBR opcode formatBastian Koppelmann
Add instructions of SBR opcode format. Add gen_loop micro-op generator function. Signed-off-by: Bastian Koppelmann <kbastian@mail.uni-paderborn.de> Reviewed-by: Richard Henderson <rth@twiddle.net> Message-id: 1409572800-4116-13-git-send-email-kbastian@mail.uni-paderborn.de Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
2014-09-01target-tricore: Add instructions of SBC and SBRN opcode formatBastian Koppelmann
Add instructions of SBC and SBRN opcode format. Signed-off-by: Bastian Koppelmann <kbastian@mail.uni-paderborn.de> Reviewed-by: Richard Henderson <rth@twiddle.net> Message-id: 1409572800-4116-12-git-send-email-kbastian@mail.uni-paderborn.de Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
2014-09-01target-tricore: Add instructions of SB opcode formatBastian Koppelmann
Add instructions of SB opcode format. Add helper call/ret. Add micro-op generator functions for branches. Add makro to generate helper functions. Signed-off-by: Bastian Koppelmann <kbastian@mail.uni-paderborn.de> Message-id: 1409572800-4116-11-git-send-email-kbastian@mail.uni-paderborn.de Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
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