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2015-12-04util/id: fully allocate names tableJohn Snow1-2/+2
Trivial: this array should be allocated to have ID_MAX entries always. Otherwise if someone were to forget to expand this table, the assertion in the id generator won't actually trigger; it will read junk data. Signed-off-by: John Snow <jsnow@redhat.com> Reviewed-by: Eric Blake <eblake@redhat.com> Reviewed-by: Jeff Cody <jcody@redhat.com> Signed-off-by: Michael Tokarev <mjt@tls.msk.ru>
2015-12-02util/mmap-alloc: fix hugetlb support on ppc64Michael S. Tsirkin2-23/+40
Since commit 8561c9244ddf1122d "exec: allocate PROT_NONE pages on top of RAM", it is no longer possible to back guest RAM with hugepages on ppc64 hosts: mmap(NULL, 285212672, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x3fff57000000 mmap(0x3fff57000000, 268435456, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED, 19, 0) = -1 EBUSY (Device or resource busy) This is because on ppc64, Linux fixes a page size for a virtual address at mmap time, so we can't switch a range of memory from anonymous small pages to hugetlbs with MAP_FIXED. See commit d0f13e3c20b6fb73ccb467bdca97fa7cf5a574cd ("[POWERPC] Introduce address space "slices"") in Linux history for the details. Detect this and create the PROT_NONE mapping using the same fd. Naturally, this makes the guard page bigger with hugetlbfs. Based on patch by Greg Kurz. Acked-by: Rik van Riel <riel@redhat.com> Reviewed-by: Greg Kurz <gkurz@linux.vnet.ibm.com> Tested-by: Greg Kurz <gkurz@linux.vnet.ibm.com> Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
2015-11-30oslib-win32: Change return type of function getpagesizeStefan Weil1-1/+1
getpagesize on Linux returns an int. Fix QEMU's implementation for Windows to return an int (instead of size_t), too. This fixes a compiler warning which was introduced recently (commit 093e3c42). Signed-off-by: Stefan Weil <sw@weilnetz.de>
2015-11-25osdep: Change default value of qemu_hw_version() to "2.5+"Eduardo Habkost1-1/+8
There are two issues with qemu_hw_version() today: 1) If a machine has hw_version set, the value returned by it is not very useful, because it is not the actual QEMU version. 2) If a machine does't set hw_version, the return value of qemu_hw_version() is broken, because it will change when upgrading QEMU. For those reasons, using qemu_hw_version() is strongly discouraged, and should be used only in code that used QEMU_VERSION in the past and needs to keep compatibility. To fix (2), instead of making every machine broken by default unless they set hw_version, make qemu_hw_version() simply return "2.5+" if qemu_set_hw_version() is not called. Suggested-by: Michael S. Tsirkin <mst@redhat.com> Signed-off-by: Eduardo Habkost <ehabkost@redhat.com> Reviewed-by: Michael S. Tsirkin <mst@redhat.com> Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
2015-11-17Merge remote-tracking branch 'remotes/kraxel/tags/pull-vnc-20151116-1' into ↵Peter Maydell1-2/+108
staging vnc: buffer code improvements, bugfixes. # gpg: Signature made Mon 16 Nov 2015 17:20:02 GMT 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/kraxel/tags/pull-vnc-20151116-1: vnc: fix mismerge buffer: allow a buffer to shrink gracefully buffer: factor out buffer_adj_size buffer: factor out buffer_req_size vnc: recycle empty vs->output buffer vnc: fix local state init vnc: only alloc server surface with clients connected vnc: use vnc_{width,height} in vnc_set_area_dirty vnc: factor out vnc_update_server_surface vnc: add vnc_width+vnc_height helpers vnc: zap dead code vnc-jobs: move buffer reset, use new buffer move vnc: kill jobs queue buffer vnc: attach names to buffers buffer: add tracing buffer: add buffer_shrink buffer: add buffer_move buffer: add buffer_move_empty buffer: add buffer_init buffer: make the Buffer capacity increase in powers of two Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
2015-11-12block: Add average I/O queue depth to BlockDeviceTimedStatsAlberto Garcia1-5/+26
This patch adds two new fields to BlockDeviceTimedStats that track the average number of pending read and write requests for a block device. The values are calculated for the period of time defined for that interval. Signed-off-by: Alberto Garcia <berto@igalia.com> Message-id: fd31fef53e2714f2f30d59ed58ca2f67ec9ab926.1446044837.git.berto@igalia.com Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2015-11-12util: Infrastructure for computing recent averagesAlberto Garcia2-0/+211
This module computes the average of a set of values within a time window, keeping also track of the minimum and maximum values. In order to produce more accurate results it works internally by creating two time windows of the same period, offsetted by half of that period. Values are accounted on both windows and the data is always returned from the oldest one. [Add missing util/replay.o to test-timed-average dependencies to fix the build. --Stefan] Signed-off-by: Alberto Garcia <berto@igalia.com> Message-id: 201b09c21bbc9c329779d2b2365ee2b9c80dceeb.1446044837.git.berto@igalia.com Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2015-11-10qapi: Simplify error cleanup in test-qmp-*Eric Blake1-0/+7
We have several tests that perform multiple sub-actions that are expected to fail. Asserting that an error occurred, then clearing it up to prepare for the next action, turned into enough boilerplate that it was sometimes forgotten (for example, a number of tests added to test-qmp-input-visitor.c in d88f5fd leaked err). Worse, if an error is not reset to NULL, we risk invalidating later use of that error (passing a non-NULL err into a function is generally a bad idea). Encapsulate the boilerplate into a single helper function error_free_or_abort(), and consistently use it. The new function is added into error.c for use everywhere, although it is anticipated that testsuites will be the main client. Signed-off-by: Eric Blake <eblake@redhat.com> Signed-off-by: Markus Armbruster <armbru@redhat.com>
2015-11-06qemu-sockets: do not test path with access() before unlinkingPaolo Bonzini1-2/+1
Using access() is a time-of-check/time-of-use race condition. It is okay to use them to provide better error messages, but that is pretty much it. This is not one such case; on the other hand, access() *will* skip unlink() for a non-existent path, so ignore ENOENT return values from the unlink() system call. Signed-off-by: Paolo Bonzini <pbonzini@redhat.com> Reviewed-by: Markus Armbruster <armbru@redhat.com> Reviewed-by: Edgar E. Iglesias <edgar.iglesias@xilinx.com> Signed-off-by: Michael Tokarev <mjt@tls.msk.ru>
2015-11-05Merge remote-tracking branch 'remotes/bonzini/tags/for-upstream' into stagingPeter Maydell1-5/+5
* Guest ABI fixes for PC machines (hw_version) * Fixes for recent Perl * John Snow's configure fixes * file-backed RAM improvements (Igor, Pavel) * -Werror=clobbered fixes (Stefan) * Kill -d ioport * Fix qemu-system-s390x * Performance improvement for kvmclock migration # gpg: Signature made Thu 05 Nov 2015 13:42:27 GMT using RSA key ID 78C7AE83 # gpg: Good signature from "Paolo Bonzini <bonzini@gnu.org>" # gpg: aka "Paolo Bonzini <pbonzini@redhat.com>" * remotes/bonzini/tags/for-upstream: iscsi: Translate scsi sense into error code Revert "Introduce cpu_clean_all_dirty" kvmclock: add a new function to update env->tsc. configure: disable FORTIFY_SOURCE under clang backends/hostmem-file: Allow to specify full pathname for backing file configure: disallow ccache during compile tests cpu-exec: Fix compiler warning (-Werror=clobbered) memory: call begin, log_start and commit when registering a new listener megasas: Use qemu_hw_version() instead of QEMU_VERSION osdep: Rename qemu_{get, set}_version() to qemu_{, set_}hw_version() pc: Set hw_version on all machine classes qemu-log: remove -d ioport ioport: do not use CPU_LOG_IOPORT target-i386: fix pcmpxstrx equal-ordered (strstr) mode scripts/text2pod.pl: Escape left brace file_ram_alloc: propagate error to caller instead of terminating QEMU Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
2015-11-05buffer: allow a buffer to shrink gracefullyPeter Lieven1-8/+33
the idea behind this patch is to allow the buffer to shrink, but make this a seldom operation. The buffers average size is measured exponentionally smoothed with am alpha of 1/128. Signed-off-by: Peter Lieven <pl@kamp.de> Signed-off-by: Gerd Hoffmann <kraxel@redhat.com> Reviewed-by: Daniel P. Berrange <berrange@redhat.com> Message-id: 1446203414-4013-20-git-send-email-kraxel@redhat.com
2015-11-05buffer: factor out buffer_adj_sizePeter Lieven1-15/+10
Signed-off-by: Peter Lieven <pl@kamp.de> Signed-off-by: Gerd Hoffmann <kraxel@redhat.com> Reviewed-by: Daniel P. Berrange <berrange@redhat.com> Message-id: 1446203414-4013-19-git-send-email-kraxel@redhat.com
2015-11-05buffer: factor out buffer_req_sizePeter Lieven1-2/+8
Signed-off-by: Peter Lieven <pl@kamp.de> Signed-off-by: Gerd Hoffmann <kraxel@redhat.com> Reviewed-by: Daniel P. Berrange <berrange@redhat.com> Message-id: 1446203414-4013-18-git-send-email-kraxel@redhat.com
2015-11-05buffer: add tracingGerd Hoffmann1-0/+18
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com> Reviewed-by: Peter Lieven <pl@kamp.de> Reviewed-by: Daniel P. Berrange <berrange@redhat.com> Message-id: 1446203414-4013-7-git-send-email-kraxel@redhat.com
2015-11-05buffer: add buffer_shrinkGerd Hoffmann1-1/+19
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com> Reviewed-by: Peter Lieven <pl@kamp.de> Reviewed-by: Daniel P. Berrange <berrange@redhat.com> Message-id: 1446203414-4013-6-git-send-email-kraxel@redhat.com
2015-11-05buffer: add buffer_moveGerd Hoffmann1-0/+16
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com> Reviewed-by: Peter Lieven <pl@kamp.de> Reviewed-by: Daniel P. Berrange <berrange@redhat.com> Message-id: 1446203414-4013-5-git-send-email-kraxel@redhat.com
2015-11-05buffer: add buffer_move_emptyGerd Hoffmann1-0/+14
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com> Reviewed-by: Peter Lieven <pl@kamp.de> Reviewed-by: Daniel Berrange <berrange@redhat.com> Message-id: 1446203414-4013-4-git-send-email-kraxel@redhat.com
2015-11-05buffer: add buffer_initGerd Hoffmann1-0/+11
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com> Reviewed-by: Peter Lieven <pl@kamp.de> Reviewed-by: Daniel P. Berrange <berrange@redhat.com> Message-id: 1446203414-4013-3-git-send-email-kraxel@redhat.com
2015-11-05buffer: make the Buffer capacity increase in powers of twoPeter Lieven1-1/+4
This makes sure the number of reallocs is in O(log N). Signed-off-by: Peter Lieven <pl@kamp.de> Reviewed-by: Daniel P. Berrange <berrange@redhat.com> Signed-off-by: Gerd Hoffmann <kraxel@redhat.com> Message-id: 1446203414-4013-2-git-send-email-kraxel@redhat.com [ rebased to util/buffer.c ] Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
2015-11-04osdep: Rename qemu_{get, set}_version() to qemu_{, set_}hw_version()Eduardo Habkost1-5/+5
This makes the purpose of the function clearer: it is not about the version of QEMU that's running, but the version string exposed in the emulated hardware. Cc: Andrzej Zaborowski <balrogg@gmail.com> Cc: Peter Maydell <peter.maydell@linaro.org> Cc: John Snow <jsnow@redhat.com> Cc: Paolo Bonzini <pbonzini@redhat.com> Reviewed-by: John Snow <jsnow@redhat.com> Signed-off-by: Eduardo Habkost <ehabkost@redhat.com> Message-Id: <1446233769-7892-3-git-send-email-ehabkost@redhat.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2015-11-02sockets: Convert to new qapi union layoutEric Blake1-31/+31
We have two issues with our qapi union layout: 1) Even though the QMP wire format spells the tag 'type', the C code spells it 'kind', requiring some hacks in the generator. 2) The C struct uses an anonymous union, which places all tag values in the same namespace as all non-variant members. This leads to spurious collisions if a tag value matches a non-variant member's name. Make the conversion to the new layout for socket-related code. Signed-off-by: Eric Blake <eblake@redhat.com> Message-Id: <1445898903-12082-17-git-send-email-eblake@redhat.com> [Commit message tweaked slightly] Signed-off-by: Markus Armbruster <armbru@redhat.com>
2015-10-29mmap-alloc: fix error handlingMichael S. Tsirkin1-2/+2
Existing callers are checking for MAP_FAILED, so we should return that on error. Reported-by: Paolo Bonzini <pbonzini@redhat.com> Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
2015-10-24util: const event_notifier_get_fd() argumentMarc-André Lureau1-1/+1
Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com>
2015-10-22Merge remote-tracking branch 'remotes/mst/tags/for_upstream' into stagingPeter Maydell4-27/+247
vhost, pc, virtio features, fixes, cleanups New features: VT-d support for devices behind a bridge vhost-user migration support Signed-off-by: Michael S. Tsirkin <mst@redhat.com> # gpg: Signature made Thu 22 Oct 2015 12:39:19 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: (37 commits) hw/isa/lpc_ich9: inject the SMI on the VCPU that is writing to APM_CNT i386: keep cpu_model field in MachineState uptodate vhost: set the correct queue index in case of migration with multiqueue piix: fix resource leak reported by Coverity seccomp: add memfd_create to whitelist vhost-user-test: check ownership during migration vhost-user-test: add live-migration test vhost-user-test: learn to tweak various qemu arguments vhost-user-test: wrap server in TestServer struct vhost-user-test: remove useless static check vhost-user-test: move wait_for_fds() out vhost: add migration block if memfd failed vhost-user: use an enum helper for features mask vhost user: add rarp sending after live migration for legacy guest vhost user: add support of live migration net: add trace_vhost_user_event vhost-user: document migration log vhost: use a function for each call vhost-user: add a migration blocker vhost-user: send log shm fd along with log_base ... Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
2015-10-22vhost: add migration block if memfd failedMarc-André Lureau1-0/+22
Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com> Reviewed-by: Michael S. Tsirkin <mst@redhat.com> Signed-off-by: Michael S. Tsirkin <mst@redhat.com> Tested-by: Thibaut Collet <thibaut.collet@6wind.com>
2015-10-22util: add fallback for qemu_memfd_alloc()Marc-André Lureau1-2/+18
Add an open/unlink/mmap fallback for system that do not support memfd (only available since 3.17, ~1y ago). This patch may require additional SELinux policies to work for enforced systems, but should fail gracefully in this case. Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com> Reviewed-by: Michael S. Tsirkin <mst@redhat.com> Signed-off-by: Michael S. Tsirkin <mst@redhat.com> Tested-by: Thibaut Collet <thibaut.collet@6wind.com>
2015-10-22util: add memfd helpersMarc-André Lureau1-1/+71
Add qemu_memfd_alloc/free() helpers. The function helps to allocate and seal shared memory. Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com> Reviewed-by: Michael S. Tsirkin <mst@redhat.com> Signed-off-by: Michael S. Tsirkin <mst@redhat.com> Tested-by: Thibaut Collet <thibaut.collet@6wind.com>
2015-10-22util: add linux-only memfd fallbackMarc-André Lureau2-0/+55
Implement memfd_create() fallback if not available in system libc. memfd_create() is still not included in glibc today, atlhough it's been available since Linux 3.17 in Oct 2014. memfd has numerous advantages over traditional shm/mmap for ipc memory sharing with fd handler, which we are going to make use of for vhost-user logging memory in following patches. The next patches are going to introduce helpers to use best practices of memfd usage and provide some compatibility fallback. memfd.c is thus temporarily useless and eventually empty if memfd_create() is provided by the system. Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com> Reviewed-by: Michael S. Tsirkin <mst@redhat.com> Signed-off-by: Michael S. Tsirkin <mst@redhat.com> Tested-by: Thibaut Collet <thibaut.collet@6wind.com>
2015-10-22build-sys: split util-obj- on multi-linesMarc-André Lureau1-3/+8
Make it easier to add new unrelated units with shorter lines. Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com> Reviewed-by: Michael S. Tsirkin <mst@redhat.com> Signed-off-by: Michael S. Tsirkin <mst@redhat.com> Tested-by: Thibaut Collet <thibaut.collet@6wind.com>
2015-10-21Merge remote-tracking branch 'remotes/cohuck/tags/s390x-20151021-v2' into ↵Peter Maydell1-0/+8
staging More s390x patches. The first ones are fixes: A regression, missed compat and a missed part of the SIMD support. The others contain optimizations and cleanup. # gpg: Signature made Wed 21 Oct 2015 11:24:48 BST using RSA key ID C6F02FAF # gpg: Good signature from "Cornelia Huck <huckc@linux.vnet.ibm.com>" # gpg: aka "Cornelia Huck <cornelia.huck@de.ibm.com>" * remotes/cohuck/tags/s390x-20151021-v2: s390x/cmma: clean up cmma reset s390x: reset crypto only on clear reset and QEMU reset s390x: machine reset function with new ipl cpu handling s390x/ipl: we always have an ipl device s390x: unify device reset during subsystem_reset() s390x: flagify mcic values s390x/kvm: Fix vector validity bit in device machine checks s390x/virtio-ccw: fix 2.4 virtio compat util/qemu-config: fix missing machine command line options Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
2015-10-21exec: factor out duplicate mmap codeMichael S. Tsirkin3-24/+76
Anonymous and file-backed RAM allocation are now almost exactly the same. Reduce code duplication by moving RAM mmap code out of oslib-posix.c and exec.c. Reported-by: Marc-André Lureau <mlureau@redhat.com> Signed-off-by: Michael S. Tsirkin <mst@redhat.com> Reviewed-by: Paolo Bonzini <pbonzini@redhat.com> Acked-by: Paolo Bonzini <pbonzini@redhat.com> Tested-by: Thibaut Collet <thibaut.collet@6wind.com>
2015-10-20util/qemu-config: fix missing machine command line optionsTony Krowiak1-0/+8
Commit 0a7cf217 ("util/qemu-config: fix regression of qmp_query_command_line_options") aimed to restore parsing of global machine options, but missed two: "aes-key-wrap" and "dea-key-wrap" (which were present in the initial version of that patch). Let's add them to the machine_opts again. Fixes: 0a7cf217 ("util/qemu-config: fix regression of qmp_query_command_line_options") CC: Marcel Apfelbaum <marcel@redhat.com> CC: qemu-stable@nongnu.org Signed-off-by: Tony Krowiak <akrowiak@linux.vnet.ibm.com> Reviewed-by: Marcel Apfelbaum <marcel@redhat.com> Tested-by: Christian Borntraeger <borntraeger@de.ibm.com> Message-Id: <1444664181-28023-1-git-send-email-akrowiak@linux.vnet.ibm.com> Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com>
2015-10-20util: pull Buffer code out of VNC moduleDaniel P. Berrange2-0/+66
The Buffer code in the VNC server is useful for the IO channel code, so pull it out into a shared module, QIOBuffer. Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
2015-10-20coroutine: move into libqemuutil.a libraryDaniel P. Berrange9-0/+1253
The coroutine files are currently referenced by the block-obj-y variable. The coroutine functionality though is already used by more than just the block code. eg migration code uses coroutine yield. In the future the I/O channel code will also use the coroutine yield functionality. Since the coroutine code is nicely self-contained it can be easily built as part of the libqemuutil.a library, making it widely available. The headers are also moved into include/qemu, instead of the include/block directory, since they are now part of the util codebase, and the impl was never in the block/ directory either. Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
2015-10-20osdep: add qemu_fork() wrapper for safely handling signalsDaniel P. Berrange2-0/+80
When using regular fork() the child process of course inherits all the parents' signal handlers. If the child then proceeds to close() any open file descriptors, it may break some of those registered signal handlers. The child generally does not want to ever run any of the signal handlers that the parent may have installed in the short time before it exec's. The parent may also have blocked various signals which the child process will want enabled. This introduces a wrapper qemu_fork() that takes care to sanitize signal handling across fork. Before forking it blocks all signals in the parent thread. After fork returns, the parent unblocks the signals and carries on as usual. The child, however, resets all the signal handlers back to their defaults before it unblocks signals. The child process can now exec the binary in a "clean" signal environment. Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
2015-10-20sockets: allow port to be NULL when listening on IP addressDaniel P. Berrange1-5/+13
If the port in the SocketAddress struct is NULL, it can allow the kernel to automatically select a free port. This is useful in particular in unit tests to avoid a race trying to find a free port to run a test case on. Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
2015-10-20sockets: move qapi_copy_SocketAddress into qemu-sockets.cDaniel P. Berrange1-0/+30
The qapi_copy_SocketAddress method is going to be useful in more places than just qemu-char.c, so move it into the qemu-sockets.c file to allow its reuse. Reviewed-by: Eric Blake <eblake@redhat.com> Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
2015-10-20sockets: add helpers for creating SocketAddress from a socketDaniel P. Berrange1-0/+110
Add two helper methods that, given a socket file descriptor, can return a populated SocketAddress struct containing either the local or remote address information. Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
2015-10-19Merge remote-tracking branch 'remotes/bonzini/tags/for-upstream' into stagingPeter Maydell1-3/+6
* KVM page size fix for PPC * Support for Linux 4.4's new Hyper-V features * Eliminate g_slice from areas I maintain * checkpatch fix * Peter's cpu_reload_memory_map() cleanups * More changes to MAINTAINERS * Require Python 2.6 * chardev creation fixes * PCI requester id for ARM KVM * cleanups and doc fixes * Allow customization of the Hyper-V vendor id # gpg: Signature made Mon 19 Oct 2015 09:13:10 BST using RSA key ID 78C7AE83 # gpg: Good signature from "Paolo Bonzini <bonzini@gnu.org>" # gpg: aka "Paolo Bonzini <pbonzini@redhat.com>" * remotes/bonzini/tags/for-upstream: (49 commits) kvm: Allow the Hyper-V vendor ID to be specified kvm: Move x86-specific functions into target-i386/kvm.c kvm: Pass PCI device pointer to MSI routing functions hw/pci: Introduce pci_requester_id() kvm: Make KVM_CAP_SIGNAL_MSI globally available doc/rcu: fix g_free_rcu() usage example qemu-char: cleanup after completed conversion to cd->create qemu-char: convert ringbuf backend to data-driven creation qemu-char: convert vc backend to data-driven creation qemu-char: convert spice backend to data-driven creation qemu-char: convert console backend to data-driven creation qemu-char: convert stdio backend to data-driven creation qemu-char: convert testdev backend to data-driven creation qemu-char: convert braille backend to data-driven creation qemu-char: convert msmouse backend to data-driven creation qemu-char: convert mux backend to data-driven creation qemu-char: convert null backend to data-driven creation qemu-char: convert pty backend to data-driven creation qemu-char: convert UDP backend to data-driven creation qemu-char: convert socket backend to data-driven creation ... Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
2015-10-16util - add automated ID generation utilityJeff Cody1-0/+37
Multiple sub-systems in QEMU may find it useful to generate IDs for objects that a user may reference via QMP or HMP. This patch presents a standardized way to do it, so that automatic ID generation follows the same rules. This patch enforces the following rules when generating an ID: 1.) Guarantee no collisions with a user-specified ID 2.) Identify the sub-system the ID belongs to 3.) Guarantee of uniqueness 4.) Spoiling predictability, to avoid creating an assumption of object ordering and parsing (i.e., we don't want users to think they can guess the next ID based on prior behavior). The scheme for this is as follows (no spaces): # subsys D RR Reserved char --| | | | Subsystem String ----| | | Unique number (64-bit) --| | Two-digit random number ---| For example, a generated node-name for the block sub-system may look like this: #block076 The caller of id_generate() is responsible for freeing the generated node name string with g_free(). Reviewed-by: John Snow <jsnow@redhat.com> Reviewed-by: Eric Blake <eblake@redhat.com> Reviewed-by: Alberto Garcia <berto@igalia.com> Signed-off-by: Jeff Cody <jcody@redhat.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2015-10-12qemu-sockets: fix conversion of ipv4/ipv6 JSON to QemuOptsPaolo Bonzini1-3/+6
The QemuOpts-based code treats "option not set" and "option set to false" the same way for the ipv4 and ipv6 options, because it is meant to handle only the ",ipv4" and ",ipv6" substrings in hand-crafted option parsers. When converting InetSocketAddress to QemuOpts, however, it is necessary to handle all three cases (not set, set to true, set to false). Currently we are not handling all cases correctly. The rules are: * if none or both options are absent, leave things as is * if the single present option is Y, the other should be N. This can be implemented by leaving things as is, or by setting the other option to N as done in this patch. * if the single present option is N, the other should be Y. This is handled by the "else if" branch of this patch. This ensures that the ipv4 option has an effect on Windows, where creating the socket with PF_UNSPEC makes an ipv6 socket. With this patch, ",ipv4" will result in a PF_INET socket instead. Reported-by: Sair, Umair <Umair_Sair@mentor.com> Tested-by: Sair, Umair <Umair_Sair@mentor.com> Reviewed-by: Daniel P. Berrange <berrange@redhat.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2015-10-01oslib: allocate PROT_NONE pages on top of RAMMichael S. Tsirkin1-4/+4
This inserts a read and write protected page between RAM and QEMU memory. This makes it harder to exploit QEMU bugs resulting from buffer overflows in devices using variants of cpu_physical_memory_map, dma_memory_map etc. Signed-off-by: Michael S. Tsirkin <mst@redhat.com> Reviewed-by: Paolo Bonzini <pbonzini@redhat.com> Acked-by: Paolo Bonzini <pbonzini@redhat.com>
2015-10-01oslib: rework anonimous RAM allocationMichael S. Tsirkin1-2/+10
At the moment we first allocate RAM, sometimes more than necessary for alignment reasons. We then free the extra RAM. Rework this to avoid the temporary allocation: reserve the range by mapping it with PROT_NONE, then use just the necessary range with MAP_FIXED. Signed-off-by: Michael S. Tsirkin <mst@redhat.com> Reviewed-by: Paolo Bonzini <pbonzini@redhat.com> Acked-by: Paolo Bonzini <pbonzini@redhat.com>
2015-09-25utils: rename strtosz to use qemu prefixMarc-André Lureau1-12/+13
Not only it makes sense, but it gets rid of checkpatch warning: WARNING: consider using qemu_strtosz in preference to strtosz Also remove get rid of tabs to please checkpatch. Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com> Message-Id: <1442419377-9309-1-git-send-email-marcandre.lureau@redhat.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2015-09-24oslib-win32: only provide localtime_r/gmtime_r if missingDaniel P. Berrange1-0/+2
The oslib-win32 file currently provides a localtime_r and gmtime_r replacement unconditionally. Some versions of Mingw-w64 would provide crude macros for localtime_r/gmtime_r which QEMU takes care to disable. Latest versions of Mingw-w64 now provide actual functions for localtime_r/gmtime_r, but with a twist that you have to include unistd.h or pthread.h before including time.h. By luck some files in QEMU have such an include order, resulting in compile errors: CC util/osdep.o In file included from include/qemu-common.h:48:0, from util/osdep.c:48: include/sysemu/os-win32.h:77:12: error: redundant redeclaration of 'gmtime_r' [-Werror=redundant-decls] struct tm *gmtime_r(const time_t *timep, struct tm *result); ^ In file included from include/qemu-common.h:35:0, from util/osdep.c:48: /usr/i686-w64-mingw32/sys-root/mingw/include/time.h:272:107: note: previous definition of 'gmtime_r' was here In file included from include/qemu-common.h:48:0, from util/osdep.c:48: include/sysemu/os-win32.h:79:12: error: redundant redeclaration of 'localtime_r' [-Werror=redundant-decls] struct tm *localtime_r(const time_t *timep, struct tm *result); ^ In file included from include/qemu-common.h:35:0, from util/osdep.c:48: /usr/i686-w64-mingw32/sys-root/mingw/include/time.h:269:107: note: previous definition of 'localtime_r' was here This change adds a configure test to see if localtime_r exits, and only enables the QEMU impl if missing. We also re-arrange qemu-common.h try attempt to guarantee that all source files get unistd.h before time.h and thus see the localtime_r/gmtime_r defs. [sw: Use "official" spellings for Mingw-w64, MinGW in comments.] [sw: Terminate sentences with a dot in comments.] Signed-off-by: Daniel P. Berrange <berrange@redhat.com> Reviewed-by: Denis V. Lunev <den@openvz.org> Signed-off-by: Stefan Weil <sw@weilnetz.de>
2015-09-24qemu-thread: add a fast path to the Win32 QemuEventPaolo Bonzini1-4/+62
QemuEvents are used heavily by call_rcu. We do not want them to be slow, but the current implementation does a kernel call on every invocation of qemu_event_* and won't cut it. So, wrap a Win32 manual-reset event with a fast userspace path. The states and transitions are the same as for the futex and mutex/condvar implementations, but the slow path is different of course. The idea is to reset the Win32 event lazily, as part of a test-reset-test-wait sequence. Such a sequence is, indeed, how QemuEvents are used by RCU and other subsystems! The patch includes a formal model of the algorithm. Tested-by: Stefan Weil <sw@weilnetz.de> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com> Signed-off-by: Stefan Weil <sw@weilnetz.de>
2015-09-18error: New error_fatalMarkus Armbruster1-13/+21
Similar to error_abort, but doesn't report where the error was created, and terminates the process with exit(1) rather than abort(). Signed-off-by: Markus Armbruster <armbru@redhat.com> Message-Id: <1441983105-26376-2-git-send-email-armbru@redhat.com> Reviewed-by: Eric Blake <eblake@redhat.com> Reviewed-by: Peter Crosthwaite <crosthwaite.peter@gmail.com>
2015-09-18error: Copy location information in error_copy()Eric Blake1-0/+3
Commit 1e9b65bb forgot to propagate source information to copied errors. Signed-off-by: Eric Blake <eblake@redhat.com> Message-Id: <1441902890-23064-1-git-send-email-eblake@redhat.com> Signed-off-by: Markus Armbruster <armbru@redhat.com>
2015-09-18hmp: Allow for error message hints on HMPEric Blake2-7/+36
Commits 7216ae3d and d2828429 disabled some error message hints, all because a change to use modern error reporting meant that the hint would be output prior to the actual error. Fix this by making hints a first-class member of Error. For example, we are now back to the pleasant: $ qemu-system-x86_64 --nodefaults -S --vnc :0 --chardev null,id=, qemu-system-x86_64: --chardev null,id=,: Parameter 'id' expects an identifier Identifiers consist of letters, digits, '-', '.', '_', starting with a letter. Signed-off-by: Eric Blake <eblake@redhat.com> Reviewed-by: Paolo Bonzini <pbonzini@redhat.com> Message-Id: <1441901956-21991-1-git-send-email-eblake@redhat.com> Signed-off-by: Markus Armbruster <armbru@redhat.com>
2015-09-18error: only prepend timestamp on stderrStefan Hajnoczi1-1/+1
The -msg timestamp=on option prepends a timestamp to error messages. This is useful on stderr where it allows users to identify when an error was raised. Timestamps do not make sense on the monitor since error_report() is called in response to a synchronous monitor command and the user already knows "when" the command was issued. Additionally, the rest of the monitor conversation lacks timestamps so the error timestamp cannot be correlated with other activity. Only prepend timestamps on stderr. This fixes libvirt's 'drive_del' processing, which did not expect a timestamp. Other QEMU monitor clients are probably equally confused by timestamps on monitor error messages. Cc: Markus Armbruster <armbru@redhat.com> Cc: Seiji Aguchi <seiji.aguchi@hds.com> Cc: Frank Schreuder <fschreuder@transip.nl> Cc: Daniel P. Berrange <berrange@redhat.com> Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com> Message-Id: <1439212541-16997-1-git-send-email-stefanha@redhat.com> Reviewed-by: Daniel P. Berrange <berrange@redhat.com> Tested-by: Frank Schreuder <fschreuder@transip.nl> Signed-off-by: Markus Armbruster <armbru@redhat.com>
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