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2014-07-18hw/usb: Add missing 'static' attributeStefan Weil
Signed-off-by: Stefan Weil <sw@weilnetz.de> Signed-off-by: Michael Tokarev <mjt@tls.msk.ru>
2014-07-18doc: slirp supports ICMP echo if enabled in LinuxGernot Hillier
Since QEMU 0.15, slirp (user mode networking) supports ping to the Internet, see e6d43cfb1f9 Signed-off-by: Gernot Hillier <gernot.hillier@siemens.com> Signed-off-by: Michael Tokarev <mjt@tls.msk.ru>
2014-07-18qemu-img: Remove redundancy "ret = -1"Chen Gang
In this case, 'ret' is already '-1', so need not do it again. Signed-off-by: Chen Gang <gang.chen.5i5j@gmail.com> Signed-off-by: Michael Tokarev <mjt@tls.msk.ru>
2014-07-18Fix new typos in comments (found by codespell)Stefan Weil
arbitary -> arbitrary basicly -> basically Signed-off-by: Stefan Weil <sw@weilnetz.de> Signed-off-by: Michael Tokarev <mjt@tls.msk.ru>
2014-07-18slirp: Give error message if hostfwd_add/remove for unrecognized vlan/stackPeter Maydell
If the user specified a (vlan ID, slirp stack name) tuple in a monitor hostfwd_add/remove command and we can't find it, give the user an error message rather than silently doing nothing. This brings this error case in slirp_lookup() into line with the other two. Signed-off-by: Peter Maydell <peter.maydell@linaro.org> Reviewed-by: Michael Tokarev <mjt@tls.msk.ru> Signed-off-by: Michael Tokarev <mjt@tls.msk.ru>
2014-07-18Revert "kvmclock: Ensure time in migration never goes backward"Paolo Bonzini
This reverts commit a096b3a6732f846ec57dc28b47ee9435aa0609bf. This patch caused a hang that was fixed by commit 9b17868 (kvmclock: Ensure proper env->tsc value for kvmclock_current_nsec calculation, 2014-06-03), and we just had to revert that commit. Drop this one too. Cc: agraf@suse.de Cc: mtosatti@redhat.com Cc: qemu-stable@nongnu.org Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2014-07-18Revert "kvmclock: Ensure proper env->tsc value for kvmclock_current_nsec ↵Paolo Bonzini
calculation" This reverts commit 9b1786829aefb83f37a8f3135e3ea91c56001b56. This patch fixed a hang introduced by commit a096b3a (kvmclock: Ensure time in migration never goes backward, 2014-05-16), but it causes a regression in migration whose cause is not quite clear. Because of this, I'm choosing to revert both patches. This trades a 2.1 regression for a bug that's been there forever. Cc: agraf@suse.de Cc: mtosatti@redhat.com Cc: qemu-stable@nongnu.org Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2014-07-18module: Don't complain when a module is absentAndreas Färber
The current implementation depends on a configure-time generated list of block modules. When any of them is absent, module_load() emits a warning. This is suboptimal because extracting code to modules was mainly done to allow separate packaging of modules with intrusive dependencies. Absence of optional packages then leads to absence of modules and an error message, which users may recognize as new and report as error. Cc: Paolo Bonzini <pbonzini@redhat.com> Cc: Michael Tokarev <mjt@tls.msk.ru> Reviewed-by: Fam Zheng <famz@redhat.com> Signed-off-by: Andreas Färber <afaerber@suse.de> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2014-07-18module: Simplify module_load()Andreas Färber
The file path is not used for error reporting, so we can free it directly after use. Reviewed-by: Fam Zheng <famz@redhat.com> Signed-off-by: Andreas Färber <afaerber@suse.de> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2014-07-18qtest: new test for wdt_ib700Paolo Bonzini
Since the "pause" watchdog action had a regression and it went unnoticed for a while, let's add a test for it. Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2014-07-18Merge remote-tracking branch 'remotes/stefanha/tags/block-pull-request' into ↵Peter Maydell
staging Block pull request # gpg: Signature made Fri 18 Jul 2014 13:39:43 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/block-pull-request: qemu-iotests: fix 028 failure due to disk image path raw-posix: Fail gracefully if no working alignment is found block: Add Error argument to bdrv_refresh_limits() qcow2: Fix error path for unknown incompatible features Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
2014-07-18qemu-iotests: fix 028 failure due to disk image pathStefan Hajnoczi
The disk image path is echoed by QEMU's readline when the "drive_backup disk ${TEST_IMG}.copy" HMP command is issued. Unfortunately it is very hard to filter out the path due to readline's character-by-character output (with terminal escape sequences). Just redirect this command to /dev/null for now. Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com> Reviewed-by: Kevin Wolf <kwolf@redhat.com>
2014-07-18raw-posix: Fail gracefully if no working alignment is foundKevin Wolf
If qemu couldn't find out what O_DIRECT alignment to use with a given file, it would run into assert(bdrv_opt_mem_align(bs) != 0); in block.c and confuse users. This adds a more descriptive error message for such cases. Signed-off-by: Kevin Wolf <kwolf@redhat.com> Reviewed-by: Eric Blake <eblake@redhat.com> Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
2014-07-18block: Add Error argument to bdrv_refresh_limits()Kevin Wolf
Signed-off-by: Kevin Wolf <kwolf@redhat.com> Reviewed-by: Eric Blake <eblake@redhat.com> Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
2014-07-18qcow2: Fix error path for unknown incompatible featuresKevin Wolf
qcow2's report_unsupported_feature() had two bugs: A 32 bit truncation would prevent feature table entries for bits 32-63 from being used, and it could assign errp multiple times if there was more than one unknown feature, resulting in an error_set() assertion failure. Fix the truncation, make sure to set the error exactly once and add a qemu-iotests case for it. This fixes https://bugs.launchpad.net/qemu/+bug/1342704/ Reported-by: Maria Kustova <maria.k@catit.be> Signed-off-by: Kevin Wolf <kwolf@redhat.com> Reviewed-by: Eric Blake <eblake@redhat.com> Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
2014-07-18Merge remote-tracking branch 'remotes/mst/tags/for_upstream' into stagingPeter Maydell
pc,vhost,test fixes Minor bugfixes all over the place. Signed-off-by: Michael S. Tsirkin <mst@redhat.com> # gpg: Signature made Fri 18 Jul 2014 00:43:04 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-user: minor cleanups qtest: Adapt vhost-user-test to latest vhost-user changes vhost-user: Fix VHOST_SET_MEM_TABLE processing qtest: fix vhost-user-test compilation with old GLib fix typo: apci -> acpi pc_piix: Reuse pc_compat_1_2() for pc-0.1[0123] pc: fix qemu exiting with error when -m X < 128 with old machines types Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
2014-07-18vhost-user: minor cleanupsMichael S. Tsirkin
assert to verify cast does not discard information minor style fixup. Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
2014-07-18qtest: Adapt vhost-user-test to latest vhost-user changesNikolay Nikolaev
A new field mmap_offset was added in the vhost-user message, we need to reflect this change in the test too. Signed-off-by: Nikolay Nikolaev <n.nikolaev@virtualopensystems.com> Reviewed-by: Michael S. Tsirkin <mst@redhat.com> Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
2014-07-18vhost-user: Fix VHOST_SET_MEM_TABLE processingNikolay Nikolaev
qemu_get_ram_fd doesn't accept a guest physical address. ram_addr_t are opaque values that are assigned in qemu_ram_alloc. Find the ram_addr_t corresponding to the userspace_addr using qemu_ram_addr_from_host, and then call qemu_get_ram_fd on it. Thanks to Paolo Bonzini <pbonzini@redhat.com> Signed-off-by: Nikolay Nikolaev <n.nikolaev@virtualopensystems.com> Reviewed-by: Michael S. Tsirkin <mst@redhat.com> Signed-off-by: Michael S. Tsirkin <mst@redhat.com> Reviewed-by: Paolo Bonzini <pbonzini@redhat.com>
2014-07-17pc: fix qemu exiting with error when -m X < 128 with old machine typesIgor Mammedov
If machine doesn't support memory hotplug then starting QEMU with initial memory less than default will make QEMU exit with following error message: $QEMU -m 16 -M isapc qemu-system-i386: "-memory 'slots|maxmem'" is not supported by: isapc Set maxram_size to initial memory value before parsing 'maxmem' option allows to keep maxmem in sync with initial memory size if no maxmem option was specified. Signed-off-by: Igor Mammedov <imammedo@redhat.com> CC: Bruce Rogers <brogers@suse.com> Reviewed-By: Bruce Rogers <brogers@suse.com> Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
2014-07-17cadence_uart: check for serial backend before using it.KONRAD Frederic
This checks that s->chr is not NULL before using it. Signed-off-by: KONRAD Frederic <fred.konrad@greensocs.com> Reviewed-by: Peter Crosthwaite <peter.crosthwaite@xilinx.com> Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
2014-07-17Merge remote-tracking branch 'remotes/amit-migration/for-2.1' into stagingPeter Maydell
* remotes/amit-migration/for-2.1: vmstate static checker: detect section renames Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
2014-07-17Merge remote-tracking branch 'remotes/amit/for-2.1' into stagingPeter Maydell
* remotes/amit/for-2.1: virtio-serial-bus: keep port 0 reserved for virtconsole even on unplug Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
2014-07-16virtio-serial-bus: keep port 0 reserved for virtconsole even on unplugAmit Shah
We keep port 0 reserved for compat with older guests, where only virtio-console was expected. Even if a system is started without a virtio-console port, port #0 is kept aside. However, after a virtconsole port is unplugged, port id 0 became available, and the next hotplug of a virtserialport caused failure due to it not being a console port. Steps to reproduce: $ ./x86_64-softmmu/qemu-system-x86_64 -m 512 -cpu host -enable-kvm -device virtio-serial-pci -monitor stdio -vnc :1 QEMU 2.0.91 monitor - type 'help' for more information (qemu) device_add virtconsole,id=p1 (qemu) device_del p1 (qemu) device_add virtserialport,id=p1 Port number 0 on virtio-serial devices reserved for virtconsole devices for backward compatibility. Device 'virtserialport' could not be initialized (qemu) quit Reported-by: dengmin <mdeng@redhat.com> Reviewed-by: Amos Kong <akong@redhat.com> Reviewed-by: Paolo Bonzini <pbonzini@redhat.com> Signed-off-by: Amit Shah <amit.shah@redhat.com>
2014-07-16vmstate static checker: detect section renamesAmit Shah
Commit 292b1634 changed the section name of "ICH9 LPC" to "ICH9-LPC", and that causes the static checker to flag this: Section "ICH9 LPC" does not exist in dest This patch introduces a function that checks for section renames and also a dictionary that maps those renames. Reported-by: "Dr. David Alan Gilbert" <dgilbert@redhat.com> Signed-off-by: Amit Shah <amit.shah@redhat.com> --- This is a small patch to a script; doesn't break qemu and helps with the static checker, so it's a very low-risk patch for 2.1.
2014-07-15Update version for v2.1.0-rc2 releasev2.1.0-rc2Peter Maydell
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
2014-07-15tests/Makefile: Only run vhost-user-test on LinuxPeter Maydell
vhost-user-test uses the linux/vhost.h header, so it must only be enabled if CONFIG_LINUX is defined. (Previously it was enabled for CONFIG_POSIX, which broke 'make check' on MacOSX.) Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
2014-07-15target-i386: Allow execute from user mode when SMEP is enabled.Ricky Zhou
Previously, execute would be disabled for all pages with SMEP enabled, regardless of what mode the access took place in. Signed-off-by: Ricky Zhou <ricky@rzhou.org> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2014-07-15Merge remote-tracking branch 'remotes/riku/linux-user-for-upstream' into stagingPeter Maydell
* remotes/riku/linux-user-for-upstream: linux-user: use TARGET_SA_ONSTACK in get_sigframe alloca one extra byte sockets linux-user: handle AF_PACKET sockaddrs in target_to_host_sockaddr qemu-user: Impl. setsockopt(SO_BINDTODEVICE) SIOCGIFINDEX: fix typo Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
2014-07-15Merge remote-tracking branch 'remotes/agraf/tags/signed-ppc-for-upstream' ↵Peter Maydell
into staging Patch queue for ppc - 2014-07-15 Some more bug fixes during the RC phase: - Fix huge page mapping regressions - Fix Book3S thread number enumeration - Fix Book3S VFIO permission issue # gpg: Signature made Tue 15 Jul 2014 15:13:54 BST using RSA key ID 03FEDC60 # gpg: Can't check signature: public key not found * remotes/agraf/tags/signed-ppc-for-upstream: sPAPR/IOMMU: Fix TCE entry permission spapr: Enable use of huge pages spapr: Move RMA memory region registration code ppc: memory: Replace memory_region_init_ram with memory_region_allocate_system_memory target-ppc: Fix number of threads per core limit Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
2014-07-15sPAPR/IOMMU: Fix TCE entry permissionGavin Shan
The permission of TCE entry should exclude physical base address. Otherwise, unmapping TCE entry can be interpreted to mapping TCE entry wrongly for VFIO devices. Signed-off-by: Gavin Shan <gwshan@linux.vnet.ibm.com> Acked-by: Alex Williamson <alex.williamson@redhat.com> Signed-off-by: Alexander Graf <agraf@suse.de>
2014-07-15spapr: Enable use of huge pagesAlexey Kardashevskiy
0b183fc87 "memory: move mem_path handling to memory_region_allocate_system_memory" disabled -mempath use for all machines that do not use memory_region_allocate_system_memory() to register RAM. Since SPAPR uses memory_region_init_ram(), the huge pages support was disabled for it. This replaces memory_region_init_ram()+vmstate_register_ram_global() with memory_region_allocate_system_memory() to get huge pages back. This changes RAM size from (ram_limit - rma_alloc_size) to ram_limit as the previous patch moved RMA memory region allocation after RAM allocation and therefore this change does not have immediate effect but simplifies the code. Signed-off-by: Alexey Kardashevskiy <aik@ozlabs.ru> Signed-off-by: Alexander Graf <agraf@suse.de>
2014-07-15spapr: Move RMA memory region registration codeAlexey Kardashevskiy
PPC970 does not support VRMA (virtual RMA) so real memory required for SLOF to execute must be allocated by the KVM_ALLOCATE_RMA ioctl. Later this memory is used as a part of the guest RAM area. The RMA allocating code also registers a memory region for this piece of RAM. We are going to simplify memory regions layout: RMA memory region will be a subregion in the RAM memory region, both starting from zero. This way we will not have to take care of start address alignment for the piece of RAM next to the RMA. This moves memory region business closer to the RAM memory region creation/allocation code. As this is a mechanical patch, no change in behaviour is expected. Signed-off-by: Alexey Kardashevskiy <aik@ozlabs.ru> [agraf: fix compilation on non-kvm systems] Signed-off-by: Alexander Graf <agraf@suse.de>
2014-07-15ppc: memory: Replace memory_region_init_ram with ↵Shreyas B. Prabhu
memory_region_allocate_system_memory Commit 0b183fc871:"memory: move mem_path handling to memory_region_allocate_system_memory" split memory_region_init_ram and memory_region_init_ram_from_file. Also it moved mem-path handling a step up from memory_region_init_ram to memory_region_allocate_system_memory. Therefore for any board that uses memory_region_init_ram directly, -mem-path is not supported. Fix this by replacing memory_region_init_ram with memory_region_allocate_system_memory. Signed-off-by: Shreyas B. Prabhu <shreyas@linux.vnet.ibm.com> Signed-off-by: Alexander Graf <agraf@suse.de>
2014-07-15target-ppc: Fix number of threads per core limitAlexey Kardashevskiy
The number of threads per core is different for POWER6/7/8 CPUs. Guest systems do not expect to see more threads per core than a specific CPU supports so we need to limit this number. This limit is implemented by ppc_get_compat_smt_threads(). However it has a problem as it checks for PCR (Processor Compatibility Register) mask, 2.05 means 2 threads per core, 2.06 - 4 threads. For POWER8 one would expect PCR_COMPAT_2_07 bit set and ppc_get_compat_smt_threads() checking for it to return 8 threads per core. But the latest PowerISA spec now is 2.07 and there is no 2.07 compatibility mode defined, QEMU does not define it either (will be in PowerISA 2.08). Instead of relying on a PCR mask, this uses kvmppc_smt_threads() which returns the maximum supported threads number for KVM or 1 for TCG. Signed-off-by: Alexey Kardashevskiy <aik@ozlabs.ru> Signed-off-by: Alexander Graf <agraf@suse.de>
2014-07-15linux-user: use TARGET_SA_ONSTACK in get_sigframeRiku Voipio
As reported by Laurent, which should use TARGET_SA_ONSTACK on arm, microblaze and openrisc targets like we do on all others. Practical matter is minimal as for almost all archs SA_ONSTACK is 0x08000000: http://lxr.free-electrons.com/ident?i=SA_ONSTACK Reported-by: Laurent Desnogues <laurent.desnogues@gmail.com> Signed-off-by: Riku Voipio <riku.voipio@linaro.org>
2014-07-15Merge remote-tracking branch 'remotes/stefanha/tags/block-pull-request' into ↵Peter Maydell
staging Block pull request # gpg: Signature made Tue 15 Jul 2014 14:49:01 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/block-pull-request: virtio-blk: dataplane: notify guest as a batch virtio-blk: data-plane: fix save/set .complete_request in start linux-aio: Fix laio resource leak Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
2014-07-15virtio-blk: dataplane: notify guest as a batchMing Lei
Now requests are submitted as a batch, so it is natural to notify guest as a batch too. This may suppress interrupt notification to VM a lot: - in my test, decreased by ~13K/sec Signed-off-by: Ming Lei <ming.lei@canonical.com> Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
2014-07-15virtio-blk: data-plane: fix save/set .complete_request in startMing Lei
The callback has to be saved and reset in virtio_blk_data_plane_start(), otherwise dataplane's requests will be completed in qemu aio context. Reviewed-by: Fam Zheng <famz@redhat.com> Signed-off-by: Ming Lei <ming.lei@canonical.com> Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
2014-07-15linux-aio: Fix laio resource leakGonglei
when hotplug virtio-scsi disks using laio, the aio_nr will increase in laio_init() by io_setup(), we can see the number by # cat /proc/sys/fs/aio-nr 128 if the aio_nr attach the maxnum, which found from # cat /proc/sys/fs/aio-max-nr 65536 the hotplug process will fail because of aio context leak. Fix it by io_destroy in laio_cleanup(). Reported-by: daifulai <daifulai@huawei.com> Signed-off-by: Gonglei <arei.gonglei@huawei.com> Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
2014-07-15alloca one extra byte socketsJoakim Tjernlund
target_to_host_sockaddr() may increase the lenth with 1 byte for AF_UNIX sockets so allocate 1 extra byte. Signed-off-by: Joakim Tjernlund <Joakim.Tjernlund@transmode.se> Reviewed-by: Peter Maydell <peter.maydell@linaro.org> Signed-off-by: Riku Voipio <riku.voipio@linaro.org>
2014-07-15linux-user: handle AF_PACKET sockaddrs in target_to_host_sockaddrJoakim Tjernlund
Implement conversion of the AF_PACKET sockaddr subtype in target_to_host_sockaddr. Signed-off-by: Joakim Tjernlund <Joakim.Tjernlund@transmode.se> Reviewed-by: Peter Maydell <peter.maydell@linaro.org> Signed-off-by: Riku Voipio <riku.voipio@linaro.org>
2014-07-15qemu-user: Impl. setsockopt(SO_BINDTODEVICE)Joakim Tjernlund
Signed-off-by: Joakim Tjernlund <Joakim.Tjernlund@transmode.se> Reviewed-by: Peter Maydell <peter.maydell@linaro.org> Signed-off-by: Riku Voipio <riku.voipio@linaro.org>
2014-07-15SIOCGIFINDEX: fix typoJoakim Tjernlund
Wrong type was used in ioctl definition. Signed-off-by: Joakim Tjernlund <Joakim.Tjernlund@transmode.se> Reviewed-by: Peter Maydell <peter.maydell@linaro.org> Signed-off-by: Riku Voipio <riku.voipio@linaro.org>
2014-07-15libqos: Fix PC PCI endianness glitchesAndreas Färber
The libqos implementation of io_read{b,w,l} and io_write{b,w,l} hooks was relying on qtest_mem{read,write}() respectively. With d81d410 (usb: improve ehci/uhci test) this resulted in assertion failures on ppc hosts: ERROR:tests/usb-hcd-ehci-test.c:78:ehci_port_test: assertion failed: ((value & mask) == (expect & mask)) ERROR:tests/usb-hcd-ehci-test.c:128:pci_uhci_port_2: assertion failed: (pcibus != NULL) ERROR:tests/usb-hcd-ehci-test.c:150:pci_ehci_port_2: assertion failed: (pcibus != NULL) qtest_read{b,w,l,q}() and qtest_write{b,w,l,q}() had been introduced as endian-safe replacement for qtest_mem{read,write}() in I2C in 872536b (qtest: Add MMIO support). Use them for PCI as well. Cc: Anthony Liguori <aliguori@amazon.com> Cc: Gerd Hoffmann <kraxel@redhat.com> Fixes: c4efe1c qtest: add libqos including PCI support Fixes: d81d410 usb: improve ehci/uhci test Signed-off-by: Andreas Färber <afaerber@suse.de> Reviewed-by: Paolo Bonzini <pbonzini@redhat.com> Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
2014-07-14Merge remote-tracking branch 'remotes/bonzini/tags/for-upstream' into stagingPeter Maydell
Misc 2.1 fixes regarding character/serial devices and SCSI. # gpg: Signature made Mon 14 Jul 2014 16:26:08 BST using RSA key ID 9B4D86F2 # gpg: Can't check signature: public key not found * remotes/bonzini/tags/for-upstream: serial-pci: remove memory regions from BAR before destroying them virtio-scsi: fix with -M pc-i440fx-2.0 serial: change retry logic to avoid concurrency qemu-char: fix deadlock with "-monitor pty" scsi: Report error when lun number is in use Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
2014-07-14serial-pci: remove memory regions from BAR before destroying themPaolo Bonzini
Otherwise, hot-unplug of pci-serial-2x trips the assertion in memory_region_destroy: (qemu) device_del gg (qemu) qemu-system-x86_64: /work/armbru/tmp/qemu/memory.c:1021: memory_region_destroy: Assertion `((&mr->subregions)->tqh_first == ((void *)0))' failed. Aborted (core dumped) Reported-by: Markus Armbruster <armbru@redhat.com> Reviewed-by: Markus Armbruster <armbru@redhat.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2014-07-14virtio-scsi: fix with -M pc-i440fx-2.0Paolo Bonzini
Right now starting a machine with virtio-scsi and a <= 2.0 machine type fails with: qemu-system-x86_64: -device virtio-scsi-pci: Property .any_layout not found This is because the any_layout bit was actually never set after virtio-scsi was changed to support arbitrary layout for virtio buffers. (This was just a cleanup and a preparation for virtio 1.0; no guest actually checks the bit, but the new request parsing algorithms are tested even with old guest). Reported-by: David Gilbert <dgilbert@redhat.com> Reviewed-by: David Gilbert <dgilbert@redhat.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2014-07-14serial: change retry logic to avoid concurrencyKirill Batuzov
Whenever serial_xmit fails to transmit a byte it adds a watch that would call it again when the "line" becomes ready. This results in a retry chain: serial_xmit -> add_watch -> serial_xmit Each chain is able to transmit one character, and for every character passed to serial by the guest driver a new chain is spawned. The problem lays with the fact that a new chain is spawned even when there is one already waiting on the watch. So there can be several retry chains waiting concurrently on one "line". Every chain tries to transmit current character, so character order is not messed up. But also every chain increases retry counter (tsr_retry). If there are enough concurrent chains this counter will hit MAX_XMIT_RETRY value and the character will be dropped. To reproduce this bug you need to feed serial output to some program consuming it slowly enough. A python script from bug #1335444 description is an example of such program. This commit changes retry logic in the following way to avoid concurrency: instead of spawning a new chain for each character being transmitted spawn only one and make it transmit characters until FIFO is empty. The change consists of two parts: - add a do {} while () loop in serial_xmit (diff is a bit erratic for this part, diff -w will show actual change), - do not call serial_xmit from serial_ioport_write if there is one waiting on the watch already. This should fix another issue causing bug #1335444. Signed-off-by: Kirill Batuzov <batuzovk@ispras.ru> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2014-07-14qemu-char: fix deadlock with "-monitor pty"Paolo Bonzini
qemu_chr_be_generic_open cannot be called with the write lock taken, because it calls client code that may call qemu_chr_fe_write. This actually happens for the monitor: 0x00007ffff27dbf79 in __GI_raise (sig=sig@entry=6) 0x00007ffff27df388 in __GI_abort () 0x00005555555ef489 in error_exit (err=<optimized out>, msg=msg@entry=0x5555559796d0 <__func__.5959> "qemu_mutex_lock") 0x00005555558f9080 in qemu_mutex_lock (mutex=mutex@entry=0x555556248a30) 0x0000555555713936 in qemu_chr_fe_write (s=0x555556248a30, buf=buf@entry=0x5555563d8870 "QEMU 2.0.90 monitor - type 'help' for more information\r\n", len=56) 0x00005555556217fd in monitor_flush_locked (mon=mon@entry=0x555556251fd0) 0x0000555555621a12 in monitor_flush_locked (mon=0x555556251fd0) monitor_puts (mon=mon@entry=0x555556251fd0, str=0x55555634bfa7 "", str@entry=0x55555634bf70 "QEMU 2.0.90 monitor - type 'help' for more information\n") 0x0000555555624359 in monitor_vprintf (mon=0x555556251fd0, fmt=<optimized out>, ap=<optimized out>) 0x0000555555624414 in monitor_printf (mon=<optimized out>, fmt=fmt@entry=0x5555559105a0 "QEMU %s monitor - type 'help' for more information\n") 0x0000555555629806 in monitor_event (opaque=0x555556251fd0, event=<optimized out>) 0x000055555571343c in qemu_chr_be_generic_open (s=0x555556248a30) To avoid this, defer the call to an idle callback, which will be called as soon as the main loop is re-entered. In order to simplify the cleanup and do it in one place only, change pty_chr_close to call pty_chr_state. To reproduce, run with "-monitor pty", then try to read from the slave /dev/pts/FOO that it creates. Fixes: 9005b2a7589540a3733b3abdcfbccfe7746cd1a1 Reported-by: Li Liang <liangx.z.li@intel.com> Reviewed-by: Fam Zheng <famz@redhat.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
generated by cgit v1.2.3 (git 2.26.2) at 2025-03-14 18:10:34 +0000