QEMU added support for ivshmem-plain and ivshmem-doorbell. Those are reworked varians of legacy ivshmem that are compatible, but have sane specification and handling.
Resolves: https://bugzilla.redhat.com/show_bug.cgi?id=1347049 Signed-off-by: Martin Kletzander <mklet...@redhat.com> --- src/qemu/qemu_command.c | 66 ++++++++++++++++++++-- .../qemuxml2argv-shmem-plain-doorbell.args | 42 ++++++++++++++ .../qemuxml2argv-shmem-plain-doorbell.xml | 54 ++++++++++++++++++ tests/qemuxml2argvtest.c | 3 + 4 files changed, 161 insertions(+), 4 deletions(-) create mode 100644 tests/qemuxml2argvdata/qemuxml2argv-shmem-plain-doorbell.args create mode 100644 tests/qemuxml2argvdata/qemuxml2argv-shmem-plain-doorbell.xml diff --git a/src/qemu/qemu_command.c b/src/qemu/qemu_command.c index 2d670edcd848..40a8d861503e 100644 --- a/src/qemu/qemu_command.c +++ b/src/qemu/qemu_command.c @@ -8445,6 +8445,50 @@ qemuBuildShmemDevLegacyStr(virDomainDefPtr def, return NULL; } +static int +qemuBuildShmemDevCommandLine(virCommandPtr cmd, + virDomainDefPtr def, + virDomainShmemDefPtr shmem, + virQEMUCapsPtr qemuCaps) +{ + virBuffer buf = VIR_BUFFER_INITIALIZER; + + virCommandAddArg(cmd, "-device"); + + if (shmem->server.enabled) { + virBufferAddLit(&buf, "ivshmem-doorbell"); + virBufferAsprintf(&buf, ",id=%s,chardev=char%s", + shmem->info.alias, shmem->info.alias); + if (shmem->msi.vectors) + virBufferAsprintf(&buf, ",vectors=%u", shmem->msi.vectors); + if (shmem->msi.ioeventfd) + virBufferAsprintf(&buf, ",ioeventfd=%s", + virTristateSwitchTypeToString(shmem->msi.ioeventfd)); + } else { + virBufferAddLit(&buf, "ivshmem-plain"); + virBufferAsprintf(&buf, ",id=%s,memdev=shmmem-%s", + shmem->info.alias, shmem->info.alias); + } + + if (qemuBuildDeviceAddressStr(&buf, def, &shmem->info, qemuCaps) < 0) { + virBufferFreeAndReset(&buf); + return -1; + } + + virCommandAddArgBuffer(cmd, &buf); + + if (!shmem->server.enabled) { + virBufferAddLit(&buf, "memory-backend-file"); + virBufferAsprintf(&buf, ",id=shmmem-%s,size=%llum,mem-path=/dev/shm/%s", + shmem->info.alias, shmem->size >> 20, shmem->name); + + virCommandAddArg(cmd, "-device"); + virCommandAddArgBuffer(cmd, &buf); + } + + return 0; +} + static char * qemuBuildShmemBackendStr(virLogManagerPtr logManager, virCommandPtr cmd, @@ -8511,10 +8555,24 @@ qemuBuildShmemCommandLine(virLogManagerPtr logManager, } } - if (!(devstr = qemuBuildShmemDevLegacyStr(def, shmem, qemuCaps))) - return -1; - virCommandAddArgList(cmd, "-device", devstr, NULL); - VIR_FREE(devstr); + if (virQEMUCapsGet(qemuCaps, shmem->server.enabled ? + QEMU_CAPS_DEVICE_IVSHMEM_DOORBELL : + QEMU_CAPS_DEVICE_IVSHMEM_PLAIN)) { + if (qemuBuildShmemDevCommandLine(cmd, def, shmem, qemuCaps) < 0) + return -1; + } else { + if (!virQEMUCapsGet(qemuCaps, QEMU_CAPS_DEVICE_IVSHMEM)) { + virReportError(VIR_ERR_CONFIG_UNSUPPORTED, "%s", + _("ivshmem device is not supported " + "with this QEMU binary")); + return -1; + } + + if (!(devstr = qemuBuildShmemDevLegacyStr(def, shmem, qemuCaps))) + return -1; + virCommandAddArgList(cmd, "-device", devstr, NULL); + VIR_FREE(devstr); + } if (shmem->server.enabled) { if (!(devstr = qemuBuildShmemBackendStr(logManager, cmd, cfg, def, diff --git a/tests/qemuxml2argvdata/qemuxml2argv-shmem-plain-doorbell.args b/tests/qemuxml2argvdata/qemuxml2argv-shmem-plain-doorbell.args new file mode 100644 index 000000000000..3f246f7a018e --- /dev/null +++ b/tests/qemuxml2argvdata/qemuxml2argv-shmem-plain-doorbell.args @@ -0,0 +1,42 @@ +LC_ALL=C \ +PATH=/bin \ +HOME=/home/test \ +USER=test \ +LOGNAME=test \ +QEMU_AUDIO_DRV=none \ +/usr/bin/qemu \ +-name QEMUGuest1 \ +-S \ +-M pc \ +-m 214 \ +-smp 1,sockets=1,cores=1,threads=1 \ +-uuid c7a5fdbd-edaf-9455-926a-d65c16db1809 \ +-nographic \ +-nodefaults \ +-monitor unix:/tmp/lib/domain--1-QEMUGuest1/monitor.sock,server,nowait \ +-no-acpi \ +-boot c \ +-usb \ +-device ivshmem-plain,id=shmem0,memdev=shmmem-shmem0,bus=pci.0,addr=0x3 \ +-device memory-backend-file,id=shmmem-shmem0,size=4m,mem-path=/dev/shm/shmem0 \ +-device ivshmem-plain,id=shmem1,memdev=shmmem-shmem1,bus=pci.0,addr=0x5 \ +-device memory-backend-file,id=shmmem-shmem1,size=128m,\ +mem-path=/dev/shm/shmem1 \ +-device ivshmem-plain,id=shmem2,memdev=shmmem-shmem2,bus=pci.0,addr=0x4 \ +-device memory-backend-file,id=shmmem-shmem2,size=256m,\ +mem-path=/dev/shm/shmem2 \ +-device ivshmem-doorbell,id=shmem3,chardev=charshmem3,ioeventfd=on,bus=pci.0,\ +addr=0x6 \ +-chardev socket,id=charshmem3,path=/var/lib/libvirt/shmem-shmem3-sock \ +-device ivshmem-doorbell,id=shmem4,chardev=charshmem4,ioeventfd=on,bus=pci.0,\ +addr=0x7 \ +-chardev socket,id=charshmem4,path=/tmp/shmem4-sock \ +-device ivshmem-doorbell,id=shmem5,chardev=charshmem5,ioeventfd=off,bus=pci.0,\ +addr=0x8 \ +-chardev socket,id=charshmem5,path=/tmp/shmem5-sock \ +-device ivshmem-doorbell,id=shmem6,chardev=charshmem6,vectors=16,ioeventfd=on,\ +bus=pci.0,addr=0x9 \ +-chardev socket,id=charshmem6,path=/tmp/shmem6-sock \ +-device ivshmem-doorbell,id=shmem7,chardev=charshmem7,vectors=32,ioeventfd=on,\ +bus=pci.0,addr=0xa \ +-chardev socket,id=charshmem7,path=/tmp/shmem7-sock diff --git a/tests/qemuxml2argvdata/qemuxml2argv-shmem-plain-doorbell.xml b/tests/qemuxml2argvdata/qemuxml2argv-shmem-plain-doorbell.xml new file mode 100644 index 000000000000..5bc49044894c --- /dev/null +++ b/tests/qemuxml2argvdata/qemuxml2argv-shmem-plain-doorbell.xml @@ -0,0 +1,54 @@ +<domain type='qemu'> + <name>QEMUGuest1</name> + <uuid>c7a5fdbd-edaf-9455-926a-d65c16db1809</uuid> + <memory unit='KiB'>219136</memory> + <currentMemory unit='KiB'>219136</currentMemory> + <vcpu placement='static'>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</emulator> + <controller type='usb' index='0'/> + <controller type='pci' index='0' model='pci-root'/> + <input type='mouse' bus='ps2'/> + <input type='keyboard' bus='ps2'/> + <memballoon model='none'/> + <shmem name='shmem0'/> + <shmem name='shmem1'> + <size unit='M'>128</size> + </shmem> + <shmem name='shmem2'> + <size unit='M'>256</size> + <address type='pci' domain='0x0000' bus='0x00' slot='0x04' function='0x0'/> + </shmem> + <shmem name='shmem3'> + <size unit='M'>512</size> + <server/> + </shmem> + <shmem name='shmem4'> + <size unit='M'>1024</size> + <server path='/tmp/shmem4-sock'/> + </shmem> + <shmem name='shmem5'> + <size unit='M'>2048</size> + <server path='/tmp/shmem5-sock'/> + <msi ioeventfd='off'/> + </shmem> + <shmem name='shmem6'> + <size unit='M'>4096</size> + <server path='/tmp/shmem6-sock'/> + <msi vectors='16'/> + </shmem> + <shmem name='shmem7'> + <size unit='M'>8192</size> + <server path='/tmp/shmem7-sock'/> + <msi vectors='32' ioeventfd='on'/> + </shmem> + </devices> +</domain> diff --git a/tests/qemuxml2argvtest.c b/tests/qemuxml2argvtest.c index d5948360072f..8f382dd90091 100644 --- a/tests/qemuxml2argvtest.c +++ b/tests/qemuxml2argvtest.c @@ -1948,6 +1948,9 @@ mymain(void) DO_TEST("fips-enabled", QEMU_CAPS_ENABLE_FIPS); DO_TEST("shmem", QEMU_CAPS_DEVICE_IVSHMEM); + DO_TEST("shmem-plain-doorbell", QEMU_CAPS_DEVICE_IVSHMEM, + QEMU_CAPS_DEVICE_IVSHMEM_PLAIN, + QEMU_CAPS_DEVICE_IVSHMEM_DOORBELL); DO_TEST_FAILURE("shmem", NONE); DO_TEST_FAILURE("shmem-invalid-size", QEMU_CAPS_DEVICE_IVSHMEM); -- 2.9.2 -- libvir-list mailing list libvir-list@redhat.com https://www.redhat.com/mailman/listinfo/libvir-list
