February 2019 - Devel - libvirt List Archives

[libvirt] [PATCH] util: fix heap-buffer-overflow in virFileWrapperFdFree
by Jay Zhou 25 Feb '19

25 Feb '19

From: Jing Wu <wujing42(a)huawei.com> Some functions like doCoreDump call virFileWrapperFdNew to execute async cmds, if a step after virFileWrapperFdNew failed, the func may skip virFileWrapperFdClose and jump to cleanup label to call virFileWrapperFdFree directly. If the child process of the cmd is running and asyncioThread is polling, cmd->errbuf have been alloced at least one byte but not yet operate (*cmd->errbuf)[errlen] = '\0', access of wfd->err_msg in virFileWrapperFdFree at this time will cause risk of heap-buffer-overflow. So, we need to put VIR_WARN(wfd->err_msg) after VIR_FREE(wfd->err_msg). Besides, since virCommandFree has included virCommandAbort, there is no need to call virCommandAbort extraly. Signed-off-by: Jing Wu <wujing42(a)huawei.com> Signed-off-by: Jay Zhou <jianjay.zhou(a)huawei.com> --- src/util/virfile.c | 5 ++--- 1 file changed, 2 insertions(+), 3 deletions(-) diff --git a/src/util/virfile.c b/src/util/virfile.c index f6f9e4c..d488158 100644 --- a/src/util/virfile.c +++ b/src/util/virfile.c @@ -347,13 +347,12 @@ virFileWrapperFdFree(virFileWrapperFdPtr wfd) if (!wfd) return; + virCommandFree(wfd->cmd); + if (wfd->err_msg && *wfd->err_msg) VIR_WARN("iohelper reports: %s", wfd->err_msg); - virCommandAbort(wfd->cmd); - VIR_FREE(wfd->err_msg); - virCommandFree(wfd->cmd); VIR_FREE(wfd); } -- 1.8.3.1

2 1

[libvirt] [PATCH 0/2] tools: console: a fix and improvment
by Nikolay Shirokovskiy 25 Feb '19

25 Feb '19

Nikolay Shirokovskiy (2): tools: console: cleanup console on errors in main thread tools: console: pass stream/fd errors to user tools/virsh-console.c | 220 ++++++++++++++++++++++++++++++++++++++------------ 1 file changed, 169 insertions(+), 51 deletions(-) -- 1.8.3.1

2 6

[libvirt] [python PATCH] Fix virDomainPinIOThread typed params check
by Pavel Hrdina 25 Feb '19

25 Feb '19

The VIR_DOMAIN_IOTHREAD_POLL_SHRINK is unsigned int. Resolves: https://bugzilla.redhat.com/show_bug.cgi?id=1680546 Signed-off-by: Pavel Hrdina <phrdina(a)redhat.com> --- Pushed under trivial rule. libvirt-override.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/libvirt-override.c b/libvirt-override.c index f7b2f6b..857c018 100644 --- a/libvirt-override.c +++ b/libvirt-override.c @@ -1684,7 +1684,7 @@ libvirt_virDomainPinIOThread(PyObject *self ATTRIBUTE_UNUSED, static virPyTypedParamsHint virPyDomainSetIOThreadParams[] = { { VIR_DOMAIN_IOTHREAD_POLL_MAX_NS, VIR_TYPED_PARAM_ULLONG }, { VIR_DOMAIN_IOTHREAD_POLL_GROW, VIR_TYPED_PARAM_UINT }, - { VIR_DOMAIN_IOTHREAD_POLL_SHRINK, VIR_TYPED_PARAM_ULLONG }, + { VIR_DOMAIN_IOTHREAD_POLL_SHRINK, VIR_TYPED_PARAM_UINT }, }; static PyObject * -- 2.20.1

1 0

[libvirt] [libvirt-go PATCH 0/3] Introduce recent DomainSnapshotXML and DomainSaveImageXML flags
by Erik Skultety 25 Feb '19

25 Feb '19

Unfortunately, in order to support the new flags, the last patch introduces an API breakage as the convention we use for the bindings is to also enforce types for flags. Erik Skultety (3): Introduce DomainSnapshotXMLFlags constant Introduce DomainSaveImageXMLFlags constant Enforce new flags types in DomainSaveImageGetXMLDesc and GetXMLDesc connect.go | 2 +- domain.go | 8 +++++++- domain_compat.h | 8 ++++++++ domain_snapshot.go | 8 +++++++- domain_snapshot_wrapper.h | 2 +- 5 files changed, 24 insertions(+), 4 deletions(-) -- 2.20.1

3 13

[libvirt] [PATCH 0/2] further apparmor handling of opengl
by Christian Ehrhardt 25 Feb '19

25 Feb '19

Further testing with opengl enabled graphics showed that we need much more rules than we initially added. Upstream apparmor has abstractions [1][2] for the majority of what we'd need, but those are in no Distribution yet so we can't rely on them. But we can add rules "like those known ones" matching what our testing shows as needed when we add a gl enabled device. There is no overly critical access opened by this, but still we continue to only add those to the guests that have gl enabled. The most "discussion worthy" part of it most likely are the wildcards into /dev/devices/... but they are rather specific and read only - furthermore retracing those in advance starting from the rendernode most likely is rather error prone, so I went with the wildcards. Example apparmor denials can be found in the launchpad bug [3] [1]: https://gitlab.com/apparmor/apparmor/blob/master/profiles/apparmor.d/abstra… [2]: https://gitlab.com/apparmor/apparmor/blob/master/profiles/apparmor.d/abstra… [3]: https://bugs.launchpad.net/ubuntu/+source/libvirt/+bug/1815452 Christian Ehrhardt (2): security: aa-helper: allow virt-aa-helper to read /dev/dri security: aa-helper: generate more rules for gl devices .../apparmor/usr.lib.libvirt.virt-aa-helper | 3 +++ src/security/virt-aa-helper.c | 20 ++++++++++++++++++- 2 files changed, 22 insertions(+), 1 deletion(-) -- 2.17.1

2 11

[libvirt] [PATCH v2 0/3] bhyve: implement MSRs ignore unknown writes feature
by Roman Bogorodskiy 24 Feb '19

24 Feb '19

Changes from v1: * Replaced <msrs ignoreUnknownWrites='yes'/> with <msrs unknown="ignore|fault"/> Roman Bogorodskiy (3): conf: introduce 'msrs' feature bhyve: implement ignore unknown MSRs feature news: document bhyve msrs feature docs/drvbhyve.html.in | 22 +++++++++++ docs/formatdomain.html.in | 1 + docs/news.xml | 10 +++++ docs/schemas/domaincommon.rng | 14 +++++++ src/bhyve/bhyve_command.c | 4 ++ src/conf/domain_conf.c | 38 +++++++++++++++++++ src/conf/domain_conf.h | 16 ++++++++ src/qemu/qemu_domain.c | 1 + .../bhyvexml2argvdata/bhyvexml2argv-msrs.args | 10 +++++ .../bhyvexml2argv-msrs.ldargs | 3 ++ .../bhyvexml2argvdata/bhyvexml2argv-msrs.xml | 26 +++++++++++++ tests/bhyvexml2argvtest.c | 1 + .../bhyvexml2xmlout-msrs.xml | 36 ++++++++++++++++++ tests/bhyvexml2xmltest.c | 1 + 14 files changed, 183 insertions(+) create mode 100644 tests/bhyvexml2argvdata/bhyvexml2argv-msrs.args create mode 100644 tests/bhyvexml2argvdata/bhyvexml2argv-msrs.ldargs create mode 100644 tests/bhyvexml2argvdata/bhyvexml2argv-msrs.xml create mode 100644 tests/bhyvexml2xmloutdata/bhyvexml2xmlout-msrs.xml -- 2.20.1

2 7

[libvirt] [PATCH 0/2] cputest: Update python scripts for parsing CPU data
by Jiri Denemark 22 Feb '19

22 Feb '19

Jiri Denemark (2): cputest: Adapt scripts to split cpu_map cputest: Use python3 in CPU parser scripts tests/cputestdata/cpu-cpuid.py | 24 +++++++++++------------- tests/cputestdata/cpu-reformat.py | 2 +- 2 files changed, 12 insertions(+), 14 deletions(-) -- 2.20.1

2 3

[libvirt] [PATCH] nwfilter: allow for different format of IPv6 netmask/prefix in ebtables output
by Laine Stump 22 Feb '19

22 Feb '19

The iptables-ebtables package is meant as a drop-in replacement for the native ebtables package, but it formats some items in the -L output differently, leading to failure of scripts that depend on the output of ebtables -L. In particular: with old ebtables IPv6 prefixes are output as a netmask (e.g.: "/ffff:fc00") with iptables-ebtables IPv6 prefixes are always output as a numeric prefix (e.g. "/22"), and suppressed completely if the prefix is /128. This difference is also described in https://bugzilla.redhat.com/show_bug.cgi?id=1674536 "old" ebtables upstream has just accepted a patch to change its output to match that of iptables-ebtables: https://marc.info/?l=netfilter-devel&m=155000828923204&w=2 so it makes sense for libvirt-tck to accept the new format (as well as the old). As with the patch for fixing up MAC addresses with leading 0s, this patch also uses sed to apply a substitution to the scraped output of ebtables -L. However, rather than keeping the comparison (expected) output in the old (netmask) form, it is changed to the new (prefix) form, and the sed commands change netmasks to prefixes. (This works out better because in some cases we need to replace [all ff's] with "", and it's not possible to do that in the opposite direction :-) Signed-off-by: Laine Stump <laine(a)laine.org> --- NB: ebtables upstream hasn't changed the format of MAC addresses (yet). Also, some new errors have cropped up when running these same tests on RHEL8, but I think they are due to some new "real" bug in iptables-ebtables, since the xml2fwallout tests all succeed when run individually. .../nwfilterxml2fwallout/comment-test.fwall | 4 ++-- .../nwfilterxml2fwallout/hex-data-test.fwall | 4 ++-- .../nwfilterxml2fwallout/ipv6-test.fwall | 18 +++++++++--------- 3 files changed, 13 insertions(+), 13 deletions(-) diff --git a/scripts/nwfilter/nwfilterxml2fwallout/comment-test.fwall b/scripts/nwfilter/nwfilterxml2fwallout/comment-test.fwall index d87843b..4f467bf 100644 --- a/scripts/nwfilter/nwfilterxml2fwallout/comment-test.fwall +++ b/scripts/nwfilter/nwfilterxml2fwallout/comment-test.fwall @@ -2,9 +2,9 @@ -i vnet0 -j libvirt-I-vnet0 #ebtables -t nat -L POSTROUTING | grep vnet0 | grep -v "^Bridge" | grep -v "^$" -o vnet0 -j libvirt-O-vnet0 -#ebtables -t nat -L libvirt-I-vnet0 | sed s/01:02:03:04:05:06/1:2:3:4:5:6/g | sed s/0a:0b:0c:0d:0e:0f/a:b:c:d:e:f/g | grep -v "^Bridge" | grep -v "^$" +#ebtables -t nat -L libvirt-I-vnet0 | sed 's#/ffff:ffff:ffff:ffff:ffff:ffff:ffff:8000#/113#g' | sed 's#/ffff:fc00::#/22#g' | sed s/01:02:03:04:05:06/1:2:3:4:5:6/g | sed s/0a:0b:0c:0d:0e:0f/a:b:c:d:e:f/g | grep -v "^Bridge" | grep -v "^$" -p IPv4 -s 1:2:3:4:5:6 -d aa:bb:cc:dd:ee:ff --ip-src 10.1.2.3 --ip-dst 10.1.2.3 --ip-tos 0x32 --ip-proto udp --ip-sport 291:564 --ip-dport 13398:17767 -j ACCEPT --p IPv6 -s 1:2:3:4:5:6/ff:ff:ff:ff:ff:fe -d aa:bb:cc:dd:ee:80/ff:ff:ff:ff:ff:80 --ip6-src ::/ffff:fc00:: --ip6-dst ::10.1.0.0/ffff:ffff:ffff:ffff:ffff:ffff:ffff:8000 --ip6-proto tcp --ip6-sport 273:400 --ip6-dport 13107:65535 -j ACCEPT +-p IPv6 -s 1:2:3:4:5:6/ff:ff:ff:ff:ff:fe -d aa:bb:cc:dd:ee:80/ff:ff:ff:ff:ff:80 --ip6-src ::/22 --ip6-dst ::10.1.0.0/113 --ip6-proto tcp --ip6-sport 273:400 --ip6-dport 13107:65535 -j ACCEPT -p ARP -s 1:2:3:4:5:6 -d aa:bb:cc:dd:ee:ff --arp-op Request --arp-htype 18 --arp-ptype 0x56 --arp-mac-src 1:2:3:4:5:6 --arp-mac-dst a:b:c:d:e:f -j ACCEPT #ebtables -t nat -L libvirt-O-vnet0 | grep -v "^Bridge" | grep -v "^$" -p 0x1234 -j ACCEPT diff --git a/scripts/nwfilter/nwfilterxml2fwallout/hex-data-test.fwall b/scripts/nwfilter/nwfilterxml2fwallout/hex-data-test.fwall index 56d3956..0cd9a8d 100644 --- a/scripts/nwfilter/nwfilterxml2fwallout/hex-data-test.fwall +++ b/scripts/nwfilter/nwfilterxml2fwallout/hex-data-test.fwall @@ -2,9 +2,9 @@ -i vnet0 -j libvirt-I-vnet0 #ebtables -t nat -L POSTROUTING | grep vnet0 | grep -v "^Bridge" | grep -v "^$" -o vnet0 -j libvirt-O-vnet0 -#ebtables -t nat -L libvirt-I-vnet0 | sed s/01:02:03:04:05:06/1:2:3:4:5:6/g | sed s/0a:0b:0c:0d:0e:0f/a:b:c:d:e:f/g | grep -v "^Bridge" | grep -v "^$" +#ebtables -t nat -L libvirt-I-vnet0 | sed 's#/ffff:ffff:ffff:ffff:ffff:ffff:ffff:8000#/113#g' | sed 's#/ffff:fc00::#/22#g' | sed s/01:02:03:04:05:06/1:2:3:4:5:6/g | sed s/0a:0b:0c:0d:0e:0f/a:b:c:d:e:f/g | grep -v "^Bridge" | grep -v "^$" -p IPv4 -s 1:2:3:4:5:6 -d aa:bb:cc:dd:ee:ff --ip-src 10.1.2.3 --ip-dst 10.1.2.3 --ip-tos 0x32 --ip-proto udp --ip-sport 291:564 --ip-dport 13398:17767 -j ACCEPT --p IPv6 -s 1:2:3:4:5:6/ff:ff:ff:ff:ff:fe -d aa:bb:cc:dd:ee:80/ff:ff:ff:ff:ff:80 --ip6-src ::/ffff:fc00:: --ip6-dst ::10.1.0.0/ffff:ffff:ffff:ffff:ffff:ffff:ffff:8000 --ip6-proto tcp --ip6-sport 273:400 --ip6-dport 13107:65535 -j ACCEPT +-p IPv6 -s 1:2:3:4:5:6/ff:ff:ff:ff:ff:fe -d aa:bb:cc:dd:ee:80/ff:ff:ff:ff:ff:80 --ip6-src ::/22 --ip6-dst ::10.1.0.0/113 --ip6-proto tcp --ip6-sport 273:400 --ip6-dport 13107:65535 -j ACCEPT -p ARP -s 1:2:3:4:5:6 -d aa:bb:cc:dd:ee:ff --arp-op Request --arp-htype 18 --arp-ptype 0x56 --arp-mac-src 1:2:3:4:5:6 --arp-mac-dst a:b:c:d:e:f -j ACCEPT #ebtables -t nat -L libvirt-O-vnet0 | grep -v "^Bridge" | grep -v "^$" -p 0x1234 -j ACCEPT diff --git a/scripts/nwfilter/nwfilterxml2fwallout/ipv6-test.fwall b/scripts/nwfilter/nwfilterxml2fwallout/ipv6-test.fwall index 7d42f9a..d4dc627 100644 --- a/scripts/nwfilter/nwfilterxml2fwallout/ipv6-test.fwall +++ b/scripts/nwfilter/nwfilterxml2fwallout/ipv6-test.fwall @@ -2,12 +2,12 @@ -i vnet0 -j libvirt-I-vnet0 #ebtables -t nat -L POSTROUTING | grep vnet0 -o vnet0 -j libvirt-O-vnet0 -#ebtables -t nat -L libvirt-I-vnet0 | sed s/01:02:03:04:05:06/1:2:3:4:5:6/g | grep -v "^Bridge" | grep -v "^$" --p IPv6 -s 1:2:3:4:5:6/ff:ff:ff:ff:ff:fe -d aa:bb:cc:dd:ee:80/ff:ff:ff:ff:ff:80 --ip6-src ::/ffff:fc00:: --ip6-dst ::10.1.0.0/ffff:ffff:ffff:ffff:ffff:ffff:ffff:8000 --ip6-proto udp --ip6-sport 20:22 --ip6-dport 100:101 -j ACCEPT --p IPv6 --ip6-src a:b:c::/ffff:ffff:ffff:ffff:8000:: --ip6-dst 1::2/ffff:ffff:ffff:ffff:ffff:ffff:ffff:ffff --ip6-proto tcp --ip6-sport 100:101 --ip6-dport 20:22 -j ACCEPT --p IPv6 --ip6-src a:b:c::/ffff:ffff:ffff:ffff:8000:: --ip6-dst 1::2/ffff:ffff:ffff:ffff:ffff:ffff:ffff:ffff --ip6-proto tcp --ip6-sport 65535 --ip6-dport 255:256 -j ACCEPT --p IPv6 --ip6-src a:b:c::/ffff:ffff:ffff:ffff:8000:: --ip6-dst 1::2/ffff:ffff:ffff:ffff:ffff:ffff:ffff:ffff --ip6-proto mux -j ACCEPT -#ebtables -t nat -L libvirt-O-vnet0 | grep -v "^Bridge" | grep -v "^$" --p IPv6 --ip6-src 1::2/ffff:ffff:ffff:ffff:ffff:ffff:ffff:ffff --ip6-dst a:b:c::/ffff:ffff:ffff:ffff:8000:: --ip6-proto tcp --ip6-sport 20:22 --ip6-dport 100:101 -j ACCEPT --p IPv6 --ip6-src 1::2/ffff:ffff:ffff:ffff:ffff:ffff:ffff:ffff --ip6-dst a:b:c::/ffff:ffff:ffff:ffff:8000:: --ip6-proto tcp --ip6-sport 255:256 --ip6-dport 65535 -j ACCEPT --p IPv6 --ip6-src 1::2/ffff:ffff:ffff:ffff:ffff:ffff:ffff:ffff --ip6-dst a:b:c::/ffff:ffff:ffff:ffff:8000:: --ip6-proto mux -j ACCEPT +#ebtables -t nat -L libvirt-I-vnet0 | sed 's#/ffff:ffff:ffff:ffff:ffff:ffff:ffff:ffff##g' | sed 's#/ffff:ffff:ffff:ffff:ffff:ffff:ffff:8000#/113#g' | sed 's#/ffff:ffff:ffff:ffff:8000::#/65#g' | sed 's#/ffff:fc00::#/22#g' | sed s/01:02:03:04:05:06/1:2:3:4:5:6/g | grep -v "^Bridge" | grep -v "^$" +-p IPv6 -s 1:2:3:4:5:6/ff:ff:ff:ff:ff:fe -d aa:bb:cc:dd:ee:80/ff:ff:ff:ff:ff:80 --ip6-src ::/22 --ip6-dst ::10.1.0.0/113 --ip6-proto udp --ip6-sport 20:22 --ip6-dport 100:101 -j ACCEPT +-p IPv6 --ip6-src a:b:c::/65 --ip6-dst 1::2 --ip6-proto tcp --ip6-sport 100:101 --ip6-dport 20:22 -j ACCEPT +-p IPv6 --ip6-src a:b:c::/65 --ip6-dst 1::2 --ip6-proto tcp --ip6-sport 65535 --ip6-dport 255:256 -j ACCEPT +-p IPv6 --ip6-src a:b:c::/65 --ip6-dst 1::2 --ip6-proto mux -j ACCEPT +#ebtables -t nat -L libvirt-O-vnet0 | sed 's#/ffff:ffff:ffff:ffff:ffff:ffff:ffff:ffff##g' | sed 's#/ffff:ffff:ffff:ffff:8000::#/65#g' | grep -v "^Bridge" | grep -v "^$" +-p IPv6 --ip6-src 1::2 --ip6-dst a:b:c::/65 --ip6-proto tcp --ip6-sport 20:22 --ip6-dport 100:101 -j ACCEPT +-p IPv6 --ip6-src 1::2 --ip6-dst a:b:c::/65 --ip6-proto tcp --ip6-sport 255:256 --ip6-dport 65535 -j ACCEPT +-p IPv6 --ip6-src 1::2 --ip6-dst a:b:c::/65 --ip6-proto mux -j ACCEPT -- 2.20.1

2 3

[libvirt] [PATCH v5 03/14] audio: -audiodev command line option: documentation
by Kővágó, Zoltán 22 Feb '19

22 Feb '19

This patch adds documentation of an -audiodev command line option, that deprecates the old QEMU_* environment variables for audio backend configuration. It's syntax is similar to existing options (-netdev, -device, etc): -audiodev driver_name,property=value,... Although now it's possible to specify multiple -audiodev options on command line, multiple audio backends are not supported yet. Signed-off-by: Kővágó, Zoltán <DirtY.iCE.hu(a)gmail.com> --- Notes: Changes from v4: * deprecated QEMU_AUDIO_ env vars * updated to reflect qapi changes * added info to qemu-deprecated.texi qemu-deprecated.texi | 7 ++ qemu-options.hx | 236 ++++++++++++++++++++++++++++++++++++++++++- 2 files changed, 240 insertions(+), 3 deletions(-) diff --git a/qemu-deprecated.texi b/qemu-deprecated.texi index 45c57952da..5c07ad4acb 100644 --- a/qemu-deprecated.texi +++ b/qemu-deprecated.texi @@ -60,6 +60,13 @@ Support for invalid topologies will be removed, the user must ensure topologies described with -smp include all possible cpus, i.e. @math{@var{sockets} * @var{cores} * @var{threads} = @var{maxcpus}}. +@subsection QEMU_AUDIO_ environment variables and -audio-help (since 4.0) + +The ``-audiodev'' argument is now the preferred way to specify audio +backend settings instead of environment variables. To ease migration to +the new format, the ``-audiodev-help'' option can be used to convert +the current values of the environment variables to ``-audiodev'' options. + @section QEMU Machine Protocol (QMP) commands @subsection block-dirty-bitmap-add "autoload" parameter (since 2.12.0) diff --git a/qemu-options.hx b/qemu-options.hx index 77bd98e20b..f77f4d89a7 100644 --- a/qemu-options.hx +++ b/qemu-options.hx @@ -416,14 +416,244 @@ The default is @code{en-us}. ETEXI +HXCOMM Deprecated by -audiodev DEF("audio-help", 0, QEMU_OPTION_audio_help, - "-audio-help print list of audio drivers and their options\n", + "-audio-help show -audiodev equivalent of the currently specified audio settings\n", QEMU_ARCH_ALL) STEXI @item -audio-help @findex -audio-help -Will show the audio subsystem help: list of drivers, tunable -parameters. +Will show the -audiodev equivalent of the currently specified +(deprecated) environment variables. +ETEXI + +DEF("audiodev", HAS_ARG, QEMU_OPTION_audiodev, + "-audiodev [driver=]driver,id=id[,prop[=value][,...]]\n" + " specifies the audio backend to use\n" + " id= identifier of the backend\n" + " timer-period= timer period in microseconds\n" + " in|out.fixed-settings= use fixed settings for host audio\n" + " in|out.frequency= frequency to use with fixed settings\n" + " in|out.channels= number of channels to use with fixed settings\n" + " in|out.format= sample format to use with fixed settings\n" + " valid values: s8, s16, s32, u8, u16, u32\n" + " in|out.voices= number of voices to use\n" + " in|out.buffer-len= length of buffer in microseconds\n" + "-audiodev none,id=id,[,prop[=value][,...]]\n" + " dummy driver that discards all output\n" +#ifdef CONFIG_ALSA + "-audiodev alsa,id=id[,prop[=value][,...]]\n" + " in|out.dev= name of the audio device to use\n" + " in|out.period-len= length of period in microseconds\n" + " in|out.try-poll= attempt to use poll mode\n" + " threshold= threshold (in microseconds) when playback starts\n" +#endif +#ifdef CONFIG_COREAUDIO + "-audiodev coreaudio,id=id[,prop[=value][,...]]\n" + " in|out.buffer-count= number of buffers\n" +#endif +#ifdef CONFIG_DSOUND + "-audiodev dsound,id=id[,prop[=value][,...]]\n" + " latency= add extra latency to playback in microseconds\n" +#endif +#ifdef CONFIG_OSS + "-audiodev oss,id=id[,prop[=value][,...]]\n" + " in|out.dev= path of the audio device to use\n" + " in|out.buffer-count= number of buffers\n" + " in|out.try-poll= attempt to use poll mode\n" + " try-mmap= try using memory mapped access\n" + " exclusive= open device in exclusive mode\n" + " dsp-policy= set timing policy (0..10), -1 to use fragment mode\n" +#endif +#ifdef CONFIG_PA + "-audiodev pa,id=id[,prop[=value][,...]]\n" + " server= PulseAudio server address\n" + " in|out.name= source/sink device name\n" +#endif +#ifdef CONFIG_SDL + "-audiodev sdl,id=id[,prop[=value][,...]]\n" +#endif +#ifdef CONFIG_SPICE + "-audiodev spice,id=id[,prop[=value][,...]]\n" +#endif + "-audiodev wav,id=id[,prop[=value][,...]]\n" + " path= path of wav file to record\n", + QEMU_ARCH_ALL) +STEXI +@item -audiodev [driver=]@var{driver},id=@var{id}[,@var{prop}[=@var{value}][,...]] +@findex -audiodev +Adds a new audio backend @var{driver} identified by @var{id}. There are +global and driver specific properties. Some values can be set +differently for input and output, they're marked with @code{in|out.}. +You can set the input's property with @code{in.@var{prop}} and the +output's property with @code{out.@var{prop}}. For example: +@example +-audiodev alsa,id=example,in.frequency=44110,out.frequency=8000 +-audiodev alsa,id=example,out.channels=1 # leaves in.channels unspecified +@end example + +Valid global options are: + +@table @option +@item id=@var{identifier} +Identifies the audio backend. + +@item timer-period=@var{period} +Sets the timer @var{period} used by the audio subsystem in microseconds. +Default is 10000 (10 ms). + +@item in|out.fixed-settings=on|off +Use fixed settings for host audio. When off, it will change based on +how the guest opens the sound card. In this case you must not specify +@var{frequency}, @var{channels} or @var{format}. Default is on. + +@item in|out.frequency=@var{frequency} +Specify the @var{frequency} to use when using @var{fixed-settings}. +Default is 44100Hz. + +@item in|out.channels=@var{channels} +Specify the number of @var{channels} to use when using +@var{fixed-settings}. Default is 2 (stereo). + +@item in|out.format=@var{format} +Specify the sample @var{format} to use when using @var{fixed-settings}. +Valid values are: @code{s8}, @code{s16}, @code{s32}, @code{u8}, +@code{u16}, @code{u32}. Default is @code{s16}. + +@item in|out.voices=@var{voices} +Specify the number of @var{voices} to use. Default is 1. + +@item in|out.buffer=@var{usecs} +Sets the size of the buffer in microseconds. + +@end table + +@item -audiodev none,id=@var{id}[,@var{prop}[=@var{value}][,...]] +Creates a dummy backend that discards all outputs. This backend has no +backend specific properties. + +@item -audiodev alsa,id=@var{id}[,@var{prop}[=@var{value}][,...]] +Creates backend using the ALSA. This backend is only available on +Linux. + +ALSA specific options are: + +@table @option + +@item in|out.dev=@var{device} +Specify the ALSA @var{device} to use for input and/or output. Default +is @code{default}. + +@item in|out.period-len=@var{usecs} +Sets the period length in microseconds. + +@item in|out.try-poll=on|off +Attempt to use poll mode with the device. Default is on. + +@item threshold=@var{threshold} +Threshold (in microseconds) when playback starts. Default is 0. + +@end table + +@item -audiodev coreaudio,id=@var{id}[,@var{prop}[=@var{value}][,...]] +Creates a backend using Apple's Core Audio. This backend is only +available on Mac OS and only supports playback. + +Core Audio specific options are: + +@table @option + +@item in|out.buffer-count=@var{count} +Sets the @var{count} of the buffers. + +@end table + +@item -audiodev dsound,id=@var{id}[,@var{prop}[=@var{value}][,...]] +Creates a backend using Microsoft's DirectSound. This backend is only +available on Windows and only supports playback. + +DirectSound specific options are: + +@table @option + +@item latency=@var{usecs} +Add extra @var{usecs} microseconds latency to playback. Default is +10000 (10 ms). + +@end table + +@item -audiodev oss,id=@var{id}[,@var{prop}[=@var{value}][,...]] +Creates a backend using OSS. This backend is available on most +Unix-like systems. + +OSS specific options are: + +@table @option + +@item in|out.dev=@var{device} +Specify the file name of the OSS @var{device} to use. Default is +@code{/dev/dsp}. + +@item in|out.buffer-count=@var{count} +Sets the @var{count} of the buffers. + +@item in|out.try-poll=on|of +Attempt to use poll mode with the device. Default is on. + +@item try-mmap=on|off +Try using memory mapped device access. Default is off. + +@item exclusive=on|off +Open the device in exclusive mode (vmix won't work in this case). +Default is off. + +@item dsp-policy=@var{policy} +Sets the timing policy (between 0 and 10, where smaller number means +smaller latency but higher CPU usage). Use -1 to use buffer sizes +specified by @code{buffer} and @code{buffer-count}. This option is +ignored if you do not have OSS 4. Default is 5. + +@end table + +@item -audiodev pa,id=@var{id}[,@var{prop}[=@var{value}][,...]] +Creates a backend using PulseAudio. This backend is available on most +systems. + +PulseAudio specific options are: + +@table @option + +@item server=@var{server} +Sets the PulseAudio @var{server} to connect to. + +@item in|out.name=@var{sink} +Use the specified source/sink for recording/playback. + +@end table + +@item -audiodev sdl,id=@var{id}[,@var{prop}[=@var{value}][,...]] +Creates a backend using SDL. This backend is available on most systems, +but you should use your platform's native backend if possible. This +backend has no backend specific properties. + +@item -audiodev spice,id=@var{id}[,@var{prop}[=@var{value}][,...]] +Creates a backend that sends audio through SPICE. This backend requires +@code{-spice} and automatically selected in that case, so usually you +can ignore this option. This backend has no backend specific +properties. + +@item -audiodev wav,id=@var{id}[,@var{prop}[=@var{value}][,...]] +Creates a backend that writes audio to a WAV file. + +Backend specific options are: + +@table @option + +@item path=@var{path} +Write recorded audio into the specified file. Default is +(a)code{qemu.wav}. + +@end table ETEXI DEF("soundhw", HAS_ARG, QEMU_OPTION_soundhw, -- 2.20.1

4 4

[libvirt] QEMU Acceleration with Hypervisor.framework
by Clement BLAISE 22 Feb '19

22 Feb '19

Hello, I’m interested in using hvf also know as Hypervisor. framework acceleration with QEMU which has been supported since 2.12. I’ve gone through the documentation and the code base, I was unable to find an element that could enable it in libvirt. I have come across a patch (link <https://www.spinics.net/linux/fedora/libvir/msg175338.html>) which target this particular feature, but I could not find it in the repo so I guess it has not been applied. Is something that will be supported in the future?

2 1