[libvirt] [PATCH] qemu: add bochs-display device
qemu provides the bochs-display video device since 3.0. This patch adds support for this device in libvirt. See Gerd's post for more details: https://www.kraxel.org/blog/2018/10/qemu-vga-emulation-and-bochs-display/ Fixes: https://bugzilla.redhat.com/show_bug.cgi?id=1643404 Signed-off-by: Jonathon Jongsma <jjongsma@redhat.com> --- Note that the documentation may need to be changed depending on which version the patch makes it into. I suppose it'll miss 5.5.0 since we're in freeze right now. Note: depending on which distribution you're using, you may need to copy the vgabios into place in order to test. For example: $ sudo ln -s /path/to/qemu/pc-bios/vgabios-bochs-display.bin /usr/share/qemu/ docs/formatdomain.html.in | 5 +-- docs/schemas/domaincommon.rng | 1 + src/conf/domain_conf.c | 2 ++ src/conf/domain_conf.h | 1 + src/qemu/qemu_capabilities.c | 4 +++ src/qemu/qemu_capabilities.h | 3 ++ src/qemu/qemu_command.c | 18 +++++++---- src/qemu/qemu_domain.c | 1 + src/qemu/qemu_domain_address.c | 1 + .../qemucapabilitiesdata/caps_3.0.0.ppc64.xml | 1 + .../caps_3.0.0.x86_64.xml | 1 + .../qemucapabilitiesdata/caps_3.1.0.ppc64.xml | 1 + .../caps_3.1.0.x86_64.xml | 1 + .../caps_4.0.0.aarch64.xml | 1 + .../qemucapabilitiesdata/caps_4.0.0.ppc64.xml | 1 + .../caps_4.0.0.riscv32.xml | 1 + .../caps_4.0.0.riscv64.xml | 1 + .../caps_4.0.0.x86_64.xml | 1 + .../caps_4.1.0.x86_64.xml | 1 + .../video-bochs-display-device.args | 32 +++++++++++++++++++ .../video-bochs-display-device.xml | 29 +++++++++++++++++ tests/qemuxml2argvtest.c | 3 ++ 22 files changed, 102 insertions(+), 8 deletions(-) create mode 100644 tests/qemuxml2argvdata/video-bochs-display-device.args create mode 100644 tests/qemuxml2argvdata/video-bochs-display-device.xml diff --git a/docs/formatdomain.html.in b/docs/formatdomain.html.in index a7a6ec32a5..9298ee7b16 100644 --- a/docs/formatdomain.html.in +++ b/docs/formatdomain.html.in @@ -6990,8 +6990,9 @@ qemu-kvm -net nic,model=? /dev/null attribute which takes the value "vga", "cirrus", "vmvga", "xen", "vbox", "qxl" (<span class="since">since 0.8.6</span>), "virtio" (<span class="since">since 1.3.0</span>), - "gop" (<span class="since">since 3.2.0</span>), or - "none" (<span class="since">since 4.6.0</span>) + "gop" (<span class="since">since 3.2.0</span>), + "none" (<span class="since">since 4.6.0</span>, or "bochs-display" + (<span class="since">since 5.5.0</span>) depending on the hypervisor features available. The purpose of the type <code>none</code> is to instruct libvirt not to add a default video device in the guest (see the paragraph above). diff --git a/docs/schemas/domaincommon.rng b/docs/schemas/domaincommon.rng index 31db599ab9..2ccb393432 100644 --- a/docs/schemas/domaincommon.rng +++ b/docs/schemas/domaincommon.rng @@ -3584,6 +3584,7 @@ <value>virtio</value> <value>gop</value> <value>none</value> + <value>bochs-display</value> </choice> </attribute> <group> diff --git a/src/conf/domain_conf.c b/src/conf/domain_conf.c index 3323c9a5b1..f6da230c18 100644 --- a/src/conf/domain_conf.c +++ b/src/conf/domain_conf.c @@ -738,6 +738,7 @@ VIR_ENUM_IMPL(virDomainVideo, "virtio", "gop", "none", + "bochs-display", ); VIR_ENUM_IMPL(virDomainVideoVGAConf, @@ -15158,6 +15159,7 @@ virDomainVideoDefaultRAM(const virDomainDef *def, case VIR_DOMAIN_VIDEO_TYPE_VGA: case VIR_DOMAIN_VIDEO_TYPE_CIRRUS: case VIR_DOMAIN_VIDEO_TYPE_VMVGA: + case VIR_DOMAIN_VIDEO_TYPE_BOCHS_DISPLAY: if (def->virtType == VIR_DOMAIN_VIRT_VBOX) return 8 * 1024; else if (def->virtType == VIR_DOMAIN_VIRT_VMWARE) diff --git a/src/conf/domain_conf.h b/src/conf/domain_conf.h index c1b5fc1337..e8e468426b 100644 --- a/src/conf/domain_conf.h +++ b/src/conf/domain_conf.h @@ -1385,6 +1385,7 @@ typedef enum { VIR_DOMAIN_VIDEO_TYPE_VIRTIO, VIR_DOMAIN_VIDEO_TYPE_GOP, VIR_DOMAIN_VIDEO_TYPE_NONE, + VIR_DOMAIN_VIDEO_TYPE_BOCHS_DISPLAY, VIR_DOMAIN_VIDEO_TYPE_LAST } virDomainVideoType; diff --git a/src/qemu/qemu_capabilities.c b/src/qemu/qemu_capabilities.c index 02e84edc15..ec68d05112 100644 --- a/src/qemu/qemu_capabilities.c +++ b/src/qemu/qemu_capabilities.c @@ -533,6 +533,9 @@ VIR_ENUM_IMPL(virQEMUCaps, "x86-max-cpu", "cpu-unavailable-features", "canonical-cpu-features", + + /* 330 */ + "bochs-display", ); @@ -1121,6 +1124,7 @@ struct virQEMUCapsStringFlags virQEMUCapsObjectTypes[] = { { "virtio-serial-pci-transitional", QEMU_CAPS_VIRTIO_PCI_TRANSITIONAL }, { "virtio-serial-pci-non-transitional", QEMU_CAPS_VIRTIO_PCI_TRANSITIONAL }, { "max-x86_64-cpu", QEMU_CAPS_X86_MAX_CPU }, + { "bochs-display", QEMU_CAPS_DEVICE_BOCHS_DISPLAY }, }; static struct virQEMUCapsStringFlags virQEMUCapsDevicePropsVirtioBalloon[] = { diff --git a/src/qemu/qemu_capabilities.h b/src/qemu/qemu_capabilities.h index 915ba6cb2e..3cb56e63f4 100644 --- a/src/qemu/qemu_capabilities.h +++ b/src/qemu/qemu_capabilities.h @@ -515,6 +515,9 @@ typedef enum { /* virQEMUCapsFlags grouping marker for syntax-check */ QEMU_CAPS_CPU_UNAVAILABLE_FEATURES, /* "unavailable-features" CPU property */ QEMU_CAPS_CANONICAL_CPU_FEATURES, /* avoid CPU feature aliases */ + /* 335 */ + QEMU_CAPS_DEVICE_BOCHS_DISPLAY, /* -device bochs-display */ + QEMU_CAPS_LAST /* this must always be the last item */ } virQEMUCapsFlags; diff --git a/src/qemu/qemu_command.c b/src/qemu/qemu_command.c index 688dc324c6..5455b42f4a 100644 --- a/src/qemu/qemu_command.c +++ b/src/qemu/qemu_command.c @@ -111,6 +111,7 @@ VIR_ENUM_IMPL(qemuVideo, "", /* no need for virtio */ "" /* don't support gop */, "" /* 'none' doesn't make sense here */, + "bochs-display", ); VIR_ENUM_DECL(qemuDeviceVideo); @@ -128,6 +129,7 @@ VIR_ENUM_IMPL(qemuDeviceVideo, "virtio-vga", "" /* don't support gop */, "" /* 'none' doesn't make sense here */, + "bochs-display", ); VIR_ENUM_DECL(qemuDeviceVideoSecondary); @@ -145,6 +147,7 @@ VIR_ENUM_IMPL(qemuDeviceVideoSecondary, "virtio-gpu", "" /* don't support gop */, "" /* 'none' doesn't make sense here */, + "bochs-display", ); VIR_ENUM_DECL(qemuSoundCodec); @@ -4748,13 +4751,16 @@ qemuBuildDeviceVideoStr(const virDomainDef *def, if (video->heads) virBufferAsprintf(&buf, ",max_outputs=%u", video->heads); } - } else if (video->vram && - ((video->type == VIR_DOMAIN_VIDEO_TYPE_VGA && - virQEMUCapsGet(qemuCaps, QEMU_CAPS_VGA_VGAMEM)) || - (video->type == VIR_DOMAIN_VIDEO_TYPE_VMVGA && - virQEMUCapsGet(qemuCaps, QEMU_CAPS_VMWARE_SVGA_VGAMEM)))) { + } else if (video->vram) { + if ((video->type == VIR_DOMAIN_VIDEO_TYPE_VGA && + virQEMUCapsGet(qemuCaps, QEMU_CAPS_VGA_VGAMEM)) || + (video->type == VIR_DOMAIN_VIDEO_TYPE_VMVGA && + virQEMUCapsGet(qemuCaps, QEMU_CAPS_VMWARE_SVGA_VGAMEM))) { - virBufferAsprintf(&buf, ",vgamem_mb=%u", video->vram / 1024); + virBufferAsprintf(&buf, ",vgamem_mb=%u", video->vram / 1024); + } else if (video->type == VIR_DOMAIN_VIDEO_TYPE_BOCHS_DISPLAY) { + virBufferAsprintf(&buf, ",vgamem=%uk", video->vram); + } } if (qemuBuildDeviceAddressStr(&buf, def, &video->info, qemuCaps) < 0) diff --git a/src/qemu/qemu_domain.c b/src/qemu/qemu_domain.c index d71d9b3273..4e7ed45ff9 100644 --- a/src/qemu/qemu_domain.c +++ b/src/qemu/qemu_domain.c @@ -4969,6 +4969,7 @@ qemuDomainDeviceDefValidateVideo(const virDomainVideoDef *video) case VIR_DOMAIN_VIDEO_TYPE_VMVGA: case VIR_DOMAIN_VIDEO_TYPE_QXL: case VIR_DOMAIN_VIDEO_TYPE_VIRTIO: + case VIR_DOMAIN_VIDEO_TYPE_BOCHS_DISPLAY: case VIR_DOMAIN_VIDEO_TYPE_LAST: break; } diff --git a/src/qemu/qemu_domain_address.c b/src/qemu/qemu_domain_address.c index 4b99e8ca93..677a3f0499 100644 --- a/src/qemu/qemu_domain_address.c +++ b/src/qemu/qemu_domain_address.c @@ -929,6 +929,7 @@ qemuDomainDeviceCalculatePCIConnectFlags(virDomainDeviceDefPtr dev, case VIR_DOMAIN_VIDEO_TYPE_VBOX: case VIR_DOMAIN_VIDEO_TYPE_QXL: case VIR_DOMAIN_VIDEO_TYPE_PARALLELS: + case VIR_DOMAIN_VIDEO_TYPE_BOCHS_DISPLAY: return pciFlags; case VIR_DOMAIN_VIDEO_TYPE_DEFAULT: diff --git a/tests/qemucapabilitiesdata/caps_3.0.0.ppc64.xml b/tests/qemucapabilitiesdata/caps_3.0.0.ppc64.xml index 40718981a8..61be1df782 100644 --- a/tests/qemucapabilitiesdata/caps_3.0.0.ppc64.xml +++ b/tests/qemucapabilitiesdata/caps_3.0.0.ppc64.xml @@ -151,6 +151,7 @@ <flag name='memory-backend-memfd.hugetlb'/> <flag name='iothread.poll-max-ns'/> <flag name='memory-backend-file.align'/> + <flag name='bochs-display'/> <version>2012050</version> <kvmVersion>0</kvmVersion> <microcodeVersion>42900757</microcodeVersion> diff --git a/tests/qemucapabilitiesdata/caps_3.0.0.x86_64.xml b/tests/qemucapabilitiesdata/caps_3.0.0.x86_64.xml index c6394db602..7a322030bd 100644 --- a/tests/qemucapabilitiesdata/caps_3.0.0.x86_64.xml +++ b/tests/qemucapabilitiesdata/caps_3.0.0.x86_64.xml @@ -198,6 +198,7 @@ <flag name='memory-backend-file.align'/> <flag name='nvdimm.unarmed'/> <flag name='x86-max-cpu'/> + <flag name='bochs-display'/> <version>3000000</version> <kvmVersion>0</kvmVersion> <microcodeVersion>43100757</microcodeVersion> diff --git a/tests/qemucapabilitiesdata/caps_3.1.0.ppc64.xml b/tests/qemucapabilitiesdata/caps_3.1.0.ppc64.xml index ee6921ff92..400dc45be4 100644 --- a/tests/qemucapabilitiesdata/caps_3.1.0.ppc64.xml +++ b/tests/qemucapabilitiesdata/caps_3.1.0.ppc64.xml @@ -156,6 +156,7 @@ <flag name='memory-backend-file.align'/> <flag name='memory-backend-file.pmem'/> <flag name='overcommit'/> + <flag name='bochs-display'/> <version>3000091</version> <kvmVersion>0</kvmVersion> <microcodeVersion>42900758</microcodeVersion> diff --git a/tests/qemucapabilitiesdata/caps_3.1.0.x86_64.xml b/tests/qemucapabilitiesdata/caps_3.1.0.x86_64.xml index a8cb061bf3..434c644ad4 100644 --- a/tests/qemucapabilitiesdata/caps_3.1.0.x86_64.xml +++ b/tests/qemucapabilitiesdata/caps_3.1.0.x86_64.xml @@ -201,6 +201,7 @@ <flag name='nvdimm.unarmed'/> <flag name='overcommit'/> <flag name='x86-max-cpu'/> + <flag name='bochs-display'/> <version>3000092</version> <kvmVersion>0</kvmVersion> <microcodeVersion>43100758</microcodeVersion> diff --git a/tests/qemucapabilitiesdata/caps_4.0.0.aarch64.xml b/tests/qemucapabilitiesdata/caps_4.0.0.aarch64.xml index 250b7edd52..8fe369f518 100644 --- a/tests/qemucapabilitiesdata/caps_4.0.0.aarch64.xml +++ b/tests/qemucapabilitiesdata/caps_4.0.0.aarch64.xml @@ -163,6 +163,7 @@ <flag name='machine.virt.iommu'/> <flag name='bitmap-merge'/> <flag name='nbd-bitmap'/> + <flag name='bochs-display'/> <version>4000000</version> <kvmVersion>0</kvmVersion> <microcodeVersion>61700758</microcodeVersion> diff --git a/tests/qemucapabilitiesdata/caps_4.0.0.ppc64.xml b/tests/qemucapabilitiesdata/caps_4.0.0.ppc64.xml index 24b55002a6..2df230c4f7 100644 --- a/tests/qemucapabilitiesdata/caps_4.0.0.ppc64.xml +++ b/tests/qemucapabilitiesdata/caps_4.0.0.ppc64.xml @@ -168,6 +168,7 @@ <flag name='query-current-machine'/> <flag name='bitmap-merge'/> <flag name='nbd-bitmap'/> + <flag name='bochs-display'/> <version>4000000</version> <kvmVersion>0</kvmVersion> <microcodeVersion>42900758</microcodeVersion> diff --git a/tests/qemucapabilitiesdata/caps_4.0.0.riscv32.xml b/tests/qemucapabilitiesdata/caps_4.0.0.riscv32.xml index 230e1e7c99..f4acda457a 100644 --- a/tests/qemucapabilitiesdata/caps_4.0.0.riscv32.xml +++ b/tests/qemucapabilitiesdata/caps_4.0.0.riscv32.xml @@ -166,6 +166,7 @@ <flag name='query-current-machine'/> <flag name='bitmap-merge'/> <flag name='nbd-bitmap'/> + <flag name='bochs-display'/> <version>4000000</version> <kvmVersion>0</kvmVersion> <microcodeVersion>0</microcodeVersion> diff --git a/tests/qemucapabilitiesdata/caps_4.0.0.riscv64.xml b/tests/qemucapabilitiesdata/caps_4.0.0.riscv64.xml index 4b2f4cf628..e71d83ee06 100644 --- a/tests/qemucapabilitiesdata/caps_4.0.0.riscv64.xml +++ b/tests/qemucapabilitiesdata/caps_4.0.0.riscv64.xml @@ -166,6 +166,7 @@ <flag name='query-current-machine'/> <flag name='bitmap-merge'/> <flag name='nbd-bitmap'/> + <flag name='bochs-display'/> <version>4000000</version> <kvmVersion>0</kvmVersion> <microcodeVersion>0</microcodeVersion> diff --git a/tests/qemucapabilitiesdata/caps_4.0.0.x86_64.xml b/tests/qemucapabilitiesdata/caps_4.0.0.x86_64.xml index 716b756979..1d44a5a1ba 100644 --- a/tests/qemucapabilitiesdata/caps_4.0.0.x86_64.xml +++ b/tests/qemucapabilitiesdata/caps_4.0.0.x86_64.xml @@ -205,6 +205,7 @@ <flag name='bitmap-merge'/> <flag name='nbd-bitmap'/> <flag name='x86-max-cpu'/> + <flag name='bochs-display'/> <version>4000000</version> <kvmVersion>0</kvmVersion> <microcodeVersion>43100758</microcodeVersion> diff --git a/tests/qemucapabilitiesdata/caps_4.1.0.x86_64.xml b/tests/qemucapabilitiesdata/caps_4.1.0.x86_64.xml index 9cbf65b405..f336aeb48c 100644 --- a/tests/qemucapabilitiesdata/caps_4.1.0.x86_64.xml +++ b/tests/qemucapabilitiesdata/caps_4.1.0.x86_64.xml @@ -207,6 +207,7 @@ <flag name='x86-max-cpu'/> <flag name='cpu-unavailable-features'/> <flag name='canonical-cpu-features'/> + <flag name='bochs-display'/> <version>4000050</version> <kvmVersion>0</kvmVersion> <microcodeVersion>43100759</microcodeVersion> diff --git a/tests/qemuxml2argvdata/video-bochs-display-device.args b/tests/qemuxml2argvdata/video-bochs-display-device.args new file mode 100644 index 0000000000..f88e9ccb04 --- /dev/null +++ b/tests/qemuxml2argvdata/video-bochs-display-device.args @@ -0,0 +1,32 @@ +LC_ALL=C \ +PATH=/bin \ +HOME=/tmp/lib/domain--1-QEMUGuest1 \ +USER=test \ +LOGNAME=test \ +XDG_DATA_HOME=/tmp/lib/domain--1-QEMUGuest1/.local/share \ +XDG_CACHE_HOME=/tmp/lib/domain--1-QEMUGuest1/.cache \ +XDG_CONFIG_HOME=/tmp/lib/domain--1-QEMUGuest1/.config \ +QEMU_AUDIO_DRV=none \ +/usr/bin/qemu-system-i686 \ +-name QEMUGuest1 \ +-S \ +-machine pc,accel=tcg,usb=off,dump-guest-core=off \ +-m 1024 \ +-realtime mlock=off \ +-smp 1,sockets=1,cores=1,threads=1 \ +-uuid c7a5fdbd-edaf-9455-926a-d65c16db1809 \ +-display none \ +-no-user-config \ +-nodefaults \ +-chardev socket,id=charmonitor,path=/tmp/lib/domain--1-QEMUGuest1/monitor.sock,\ +server,nowait \ +-mon chardev=charmonitor,id=monitor,mode=control \ +-rtc base=utc \ +-no-shutdown \ +-no-acpi \ +-usb \ +-drive file=/var/lib/libvirt/images/QEMUGuest1,format=qcow2,if=none,\ +id=drive-ide0-0-0,cache=none \ +-device ide-hd,bus=ide.0,unit=0,drive=drive-ide0-0-0,id=ide0-0-0,bootindex=1 \ +-device bochs-display,id=video0,vgamem=16384k,bus=pci.0,addr=0x2 \ +-device virtio-balloon-pci,id=balloon0,bus=pci.0,addr=0x3 diff --git a/tests/qemuxml2argvdata/video-bochs-display-device.xml b/tests/qemuxml2argvdata/video-bochs-display-device.xml new file mode 100644 index 0000000000..f64fed4c7e --- /dev/null +++ b/tests/qemuxml2argvdata/video-bochs-display-device.xml @@ -0,0 +1,29 @@ +<domain type='qemu'> + <name>QEMUGuest1</name> + <uuid>c7a5fdbd-edaf-9455-926a-d65c16db1809</uuid> + <memory unit='KiB'>1048576</memory> + <currentMemory unit='KiB'>1048576</currentMemory> + <vcpu>1</vcpu> + <os> + <type arch='i686' machine='pc'>hvm</type> + <boot dev='hd'/> + </os> + <clock offset='utc'/> + <on_poweroff>destroy</on_poweroff> + <on_reboot>restart</on_reboot> + <on_crash>destroy</on_crash> + <devices> + <emulator>/usr/bin/qemu-system-i686</emulator> + <disk type='file' device='disk'> + <driver name='qemu' type='qcow2' cache='none'/> + <source file='/var/lib/libvirt/images/QEMUGuest1'/> + <target dev='hda' bus='ide'/> + <address type='drive' controller='0' bus='0' target='0' unit='0'/> + </disk> + <controller type='ide' index='0'/> + <video> + <model type='bochs-display' vram='16384' heads='1'/> + </video> + <memballoon model='virtio'/> + </devices> +</domain> diff --git a/tests/qemuxml2argvtest.c b/tests/qemuxml2argvtest.c index 91ca35d469..07b3689776 100644 --- a/tests/qemuxml2argvtest.c +++ b/tests/qemuxml2argvtest.c @@ -2006,6 +2006,9 @@ mymain(void) QEMU_CAPS_DEVICE_VIRTIO_VGA, QEMU_CAPS_DEVICE_VIDEO_PRIMARY, QEMU_CAPS_VIRTIO_GPU_MAX_OUTPUTS); + DO_TEST("video-bochs-display-device", + QEMU_CAPS_DEVICE_BOCHS_DISPLAY, + QEMU_CAPS_DEVICE_VIDEO_PRIMARY); DO_TEST("video-none-device", QEMU_CAPS_VNC); DO_TEST_PARSE_ERROR("video-invalid-multiple-devices", NONE); -- 2.20.1
On Thu, Jun 27, 2019 at 14:03:18 -0500, Jonathon Jongsma wrote:
qemu provides the bochs-display video device since 3.0. This patch adds support for this device in libvirt. See Gerd's post for more details: https://www.kraxel.org/blog/2018/10/qemu-vga-emulation-and-bochs-display/
Fixes: https://bugzilla.redhat.com/show_bug.cgi?id=1643404
Signed-off-by: Jonathon Jongsma <jjongsma@redhat.com> --- Note that the documentation may need to be changed depending on which version the patch makes it into. I suppose it'll miss 5.5.0 since we're in freeze right now.
Note: depending on which distribution you're using, you may need to copy the vgabios into place in order to test. For example: $ sudo ln -s /path/to/qemu/pc-bios/vgabios-bochs-display.bin /usr/share/qemu/
docs/formatdomain.html.in | 5 +-- docs/schemas/domaincommon.rng | 1 + src/conf/domain_conf.c | 2 ++ src/conf/domain_conf.h | 1 + src/qemu/qemu_capabilities.c | 4 +++ src/qemu/qemu_capabilities.h | 3 ++ src/qemu/qemu_command.c | 18 +++++++---- src/qemu/qemu_domain.c | 1 + src/qemu/qemu_domain_address.c | 1 + .../qemucapabilitiesdata/caps_3.0.0.ppc64.xml | 1 + .../caps_3.0.0.x86_64.xml | 1 + .../qemucapabilitiesdata/caps_3.1.0.ppc64.xml | 1 + .../caps_3.1.0.x86_64.xml | 1 + .../caps_4.0.0.aarch64.xml | 1 + .../qemucapabilitiesdata/caps_4.0.0.ppc64.xml | 1 + .../caps_4.0.0.riscv32.xml | 1 + .../caps_4.0.0.riscv64.xml | 1 + .../caps_4.0.0.x86_64.xml | 1 + .../caps_4.1.0.x86_64.xml | 1 + .../video-bochs-display-device.args | 32 +++++++++++++++++++ .../video-bochs-display-device.xml | 29 +++++++++++++++++ tests/qemuxml2argvtest.c | 3 ++ 22 files changed, 102 insertions(+), 8 deletions(-) create mode 100644 tests/qemuxml2argvdata/video-bochs-display-device.args create mode 100644 tests/qemuxml2argvdata/video-bochs-display-device.xml
We usually split out config/schema, and capability changes into separate patches.
diff --git a/docs/formatdomain.html.in b/docs/formatdomain.html.in index a7a6ec32a5..9298ee7b16 100644 --- a/docs/formatdomain.html.in +++ b/docs/formatdomain.html.in @@ -6990,8 +6990,9 @@ qemu-kvm -net nic,model=? /dev/null attribute which takes the value "vga", "cirrus", "vmvga", "xen", "vbox", "qxl" (<span class="since">since 0.8.6</span>), "virtio" (<span class="since">since 1.3.0</span>), - "gop" (<span class="since">since 3.2.0</span>), or - "none" (<span class="since">since 4.6.0</span>) + "gop" (<span class="since">since 3.2.0</span>), + "none" (<span class="since">since 4.6.0</span>, or "bochs-display" + (<span class="since">since 5.5.0</span>) depending on the hypervisor features available. The purpose of the type <code>none</code> is to instruct libvirt not to add a default video device in the guest (see the paragraph above).
I'm wondering whether we need to use the '-display' suffix here. While we try to model stuff universally, in this case keeping the qemu name verbatim probably makes sense. [...]
diff --git a/src/qemu/qemu_capabilities.c b/src/qemu/qemu_capabilities.c index 02e84edc15..ec68d05112 100644 --- a/src/qemu/qemu_capabilities.c +++ b/src/qemu/qemu_capabilities.c @@ -533,6 +533,9 @@ VIR_ENUM_IMPL(virQEMUCaps, "x86-max-cpu", "cpu-unavailable-features", "canonical-cpu-features", + + /* 330 */ + "bochs-display", );
[...]
static struct virQEMUCapsStringFlags virQEMUCapsDevicePropsVirtioBalloon[] = { diff --git a/src/qemu/qemu_capabilities.h b/src/qemu/qemu_capabilities.h index 915ba6cb2e..3cb56e63f4 100644 --- a/src/qemu/qemu_capabilities.h +++ b/src/qemu/qemu_capabilities.h @@ -515,6 +515,9 @@ typedef enum { /* virQEMUCapsFlags grouping marker for syntax-check */ QEMU_CAPS_CPU_UNAVAILABLE_FEATURES, /* "unavailable-features" CPU property */ QEMU_CAPS_CANONICAL_CPU_FEATURES, /* avoid CPU feature aliases */
+ /* 335 */ + QEMU_CAPS_DEVICE_BOCHS_DISPLAY, /* -device bochs-display */
The section numbers don't match with the above one.
+ QEMU_CAPS_LAST /* this must always be the last item */ } virQEMUCapsFlags;
diff --git a/src/qemu/qemu_command.c b/src/qemu/qemu_command.c index 688dc324c6..5455b42f4a 100644 --- a/src/qemu/qemu_command.c +++ b/src/qemu/qemu_command.c
[...]
@@ -145,6 +147,7 @@ VIR_ENUM_IMPL(qemuDeviceVideoSecondary, "virtio-gpu", "" /* don't support gop */, "" /* 'none' doesn't make sense here */, + "bochs-display",
You are using it with the 'qemuDeviceVideoSecondary' array, but qemuDomainDeviceDefValidateVideo allows only QXL and VIRTIO as secondary graphics, so one of them needs to change.
);
VIR_ENUM_DECL(qemuSoundCodec); @@ -4748,13 +4751,16 @@ qemuBuildDeviceVideoStr(const virDomainDef *def, if (video->heads) virBufferAsprintf(&buf, ",max_outputs=%u", video->heads); } - } else if (video->vram && - ((video->type == VIR_DOMAIN_VIDEO_TYPE_VGA && - virQEMUCapsGet(qemuCaps, QEMU_CAPS_VGA_VGAMEM)) || - (video->type == VIR_DOMAIN_VIDEO_TYPE_VMVGA && - virQEMUCapsGet(qemuCaps, QEMU_CAPS_VMWARE_SVGA_VGAMEM)))) { + } else if (video->vram) { + if ((video->type == VIR_DOMAIN_VIDEO_TYPE_VGA && + virQEMUCapsGet(qemuCaps, QEMU_CAPS_VGA_VGAMEM)) || + (video->type == VIR_DOMAIN_VIDEO_TYPE_VMVGA && + virQEMUCapsGet(qemuCaps, QEMU_CAPS_VMWARE_SVGA_VGAMEM))) {
- virBufferAsprintf(&buf, ",vgamem_mb=%u", video->vram / 1024); + virBufferAsprintf(&buf, ",vgamem_mb=%u", video->vram / 1024); + } else if (video->type == VIR_DOMAIN_VIDEO_TYPE_BOCHS_DISPLAY) { + virBufferAsprintf(&buf, ",vgamem=%uk", video->vram); + }
This logic would probably benefit of some separate refactoring first before adding actual functionality.
}
if (qemuBuildDeviceAddressStr(&buf, def, &video->info, qemuCaps) < 0)
[...]
diff --git a/src/qemu/qemu_domain_address.c b/src/qemu/qemu_domain_address.c index 4b99e8ca93..677a3f0499 100644 --- a/src/qemu/qemu_domain_address.c +++ b/src/qemu/qemu_domain_address.c @@ -929,6 +929,7 @@ qemuDomainDeviceCalculatePCIConnectFlags(virDomainDeviceDefPtr dev, case VIR_DOMAIN_VIDEO_TYPE_VBOX: case VIR_DOMAIN_VIDEO_TYPE_QXL: case VIR_DOMAIN_VIDEO_TYPE_PARALLELS: + case VIR_DOMAIN_VIDEO_TYPE_BOCHS_DISPLAY: return pciFlags;
The blog article you linked above says: "No I/O ports needed. You can plug it into an PCIe slot." Since the idea is to use it with modern machine types (which usually use PCIe) as a replacement for VGA I think that fact needs to be taken into account.
On Fri, Jun 28, 2019 at 08:53:44AM +0200, Peter Krempa wrote:
On Thu, Jun 27, 2019 at 14:03:18 -0500, Jonathon Jongsma wrote:
qemu provides the bochs-display video device since 3.0. This patch adds support for this device in libvirt. See Gerd's post for more details: https://www.kraxel.org/blog/2018/10/qemu-vga-emulation-and-bochs-display/
Fixes: https://bugzilla.redhat.com/show_bug.cgi?id=1643404
Signed-off-by: Jonathon Jongsma <jjongsma@redhat.com> --- Note that the documentation may need to be changed depending on which version the patch makes it into. I suppose it'll miss 5.5.0 since we're in freeze right now.
Note: depending on which distribution you're using, you may need to copy the vgabios into place in order to test. For example: $ sudo ln -s /path/to/qemu/pc-bios/vgabios-bochs-display.bin /usr/share/qemu/
docs/formatdomain.html.in | 5 +-- docs/schemas/domaincommon.rng | 1 + src/conf/domain_conf.c | 2 ++ src/conf/domain_conf.h | 1 + src/qemu/qemu_capabilities.c | 4 +++ src/qemu/qemu_capabilities.h | 3 ++ src/qemu/qemu_command.c | 18 +++++++---- src/qemu/qemu_domain.c | 1 + src/qemu/qemu_domain_address.c | 1 + .../qemucapabilitiesdata/caps_3.0.0.ppc64.xml | 1 + .../caps_3.0.0.x86_64.xml | 1 + .../qemucapabilitiesdata/caps_3.1.0.ppc64.xml | 1 + .../caps_3.1.0.x86_64.xml | 1 + .../caps_4.0.0.aarch64.xml | 1 + .../qemucapabilitiesdata/caps_4.0.0.ppc64.xml | 1 + .../caps_4.0.0.riscv32.xml | 1 + .../caps_4.0.0.riscv64.xml | 1 + .../caps_4.0.0.x86_64.xml | 1 + .../caps_4.1.0.x86_64.xml | 1 + .../video-bochs-display-device.args | 32 +++++++++++++++++++ .../video-bochs-display-device.xml | 29 +++++++++++++++++ tests/qemuxml2argvtest.c | 3 ++ 22 files changed, 102 insertions(+), 8 deletions(-) create mode 100644 tests/qemuxml2argvdata/video-bochs-display-device.args create mode 100644 tests/qemuxml2argvdata/video-bochs-display-device.xml
We usually split out config/schema, and capability changes into separate patches.
diff --git a/docs/formatdomain.html.in b/docs/formatdomain.html.in index a7a6ec32a5..9298ee7b16 100644 --- a/docs/formatdomain.html.in +++ b/docs/formatdomain.html.in @@ -6990,8 +6990,9 @@ qemu-kvm -net nic,model=? /dev/null attribute which takes the value "vga", "cirrus", "vmvga", "xen", "vbox", "qxl" (<span class="since">since 0.8.6</span>), "virtio" (<span class="since">since 1.3.0</span>), - "gop" (<span class="since">since 3.2.0</span>), or - "none" (<span class="since">since 4.6.0</span>) + "gop" (<span class="since">since 3.2.0</span>), + "none" (<span class="since">since 4.6.0</span>, or "bochs-display" + (<span class="since">since 5.5.0</span>) depending on the hypervisor features available. The purpose of the type <code>none</code> is to instruct libvirt not to add a default video device in the guest (see the paragraph above).
I'm wondering whether we need to use the '-display' suffix here.
We do not need it.
While we try to model stuff universally, in this case keeping the qemu name verbatim probably makes sense.
There are people who might like to argue otherwise [0], but in QEMU the device shares a namespace with all the other devices, in libvirt you already know it's a display from the <video> tag.
[...]
[0] then again I still haven't found the time to incorporate the review feedback for the debugcon series. Jano
On Mon, Jul 01, 2019 at 03:30:26PM +0200, Ján Tomko wrote:
On Fri, Jun 28, 2019 at 08:53:44AM +0200, Peter Krempa wrote:
On Thu, Jun 27, 2019 at 14:03:18 -0500, Jonathon Jongsma wrote:
qemu provides the bochs-display video device since 3.0. This patch adds support for this device in libvirt. See Gerd's post for more details: https://www.kraxel.org/blog/2018/10/qemu-vga-emulation-and-bochs-display/
Fixes: https://bugzilla.redhat.com/show_bug.cgi?id=1643404
Signed-off-by: Jonathon Jongsma <jjongsma@redhat.com> --- Note that the documentation may need to be changed depending on which version the patch makes it into. I suppose it'll miss 5.5.0 since we're in freeze right now.
Note: depending on which distribution you're using, you may need to copy the vgabios into place in order to test. For example: $ sudo ln -s /path/to/qemu/pc-bios/vgabios-bochs-display.bin /usr/share/qemu/
docs/formatdomain.html.in | 5 +-- docs/schemas/domaincommon.rng | 1 + src/conf/domain_conf.c | 2 ++ src/conf/domain_conf.h | 1 + src/qemu/qemu_capabilities.c | 4 +++ src/qemu/qemu_capabilities.h | 3 ++ src/qemu/qemu_command.c | 18 +++++++---- src/qemu/qemu_domain.c | 1 + src/qemu/qemu_domain_address.c | 1 + .../qemucapabilitiesdata/caps_3.0.0.ppc64.xml | 1 + .../caps_3.0.0.x86_64.xml | 1 + .../qemucapabilitiesdata/caps_3.1.0.ppc64.xml | 1 + .../caps_3.1.0.x86_64.xml | 1 + .../caps_4.0.0.aarch64.xml | 1 + .../qemucapabilitiesdata/caps_4.0.0.ppc64.xml | 1 + .../caps_4.0.0.riscv32.xml | 1 + .../caps_4.0.0.riscv64.xml | 1 + .../caps_4.0.0.x86_64.xml | 1 + .../caps_4.1.0.x86_64.xml | 1 + .../video-bochs-display-device.args | 32 +++++++++++++++++++ .../video-bochs-display-device.xml | 29 +++++++++++++++++ tests/qemuxml2argvtest.c | 3 ++ 22 files changed, 102 insertions(+), 8 deletions(-) create mode 100644 tests/qemuxml2argvdata/video-bochs-display-device.args create mode 100644 tests/qemuxml2argvdata/video-bochs-display-device.xml
We usually split out config/schema, and capability changes into separate patches.
diff --git a/docs/formatdomain.html.in b/docs/formatdomain.html.in index a7a6ec32a5..9298ee7b16 100644 --- a/docs/formatdomain.html.in +++ b/docs/formatdomain.html.in @@ -6990,8 +6990,9 @@ qemu-kvm -net nic,model=? /dev/null attribute which takes the value "vga", "cirrus", "vmvga", "xen", "vbox", "qxl" (<span class="since">since 0.8.6</span>), "virtio" (<span class="since">since 1.3.0</span>), - "gop" (<span class="since">since 3.2.0</span>), or - "none" (<span class="since">since 4.6.0</span>) + "gop" (<span class="since">since 3.2.0</span>), + "none" (<span class="since">since 4.6.0</span>, or "bochs-display" + (<span class="since">since 5.5.0</span>) depending on the hypervisor features available. The purpose of the type <code>none</code> is to instruct libvirt not to add a default video device in the guest (see the paragraph above).
I'm wondering whether we need to use the '-display' suffix here.
We do not need it.
While we try to model stuff universally, in this case keeping the qemu name verbatim probably makes sense.
There are people who might like to argue otherwise [0], but in QEMU the device shares a namespace with all the other devices, in libvirt you already know it's a display from the <video> tag.
Agreed. Erik
participants (4)
-
Erik Skultety -
Jonathon Jongsma -
Ján Tomko -
Peter Krempa