Re: [libvirt] [PATCH] Fix restore of QEMU guests with PCI device reservation

When restoring from a saved guest image, the XML would already contain the PCI slot ID of the IDE controller & video card. The attempt to explicitly reserve this upfront would thus fail everytime. slot at time of need, rather than upfront --- src/qemu/qemu_conf.c | 83 ++++++++++++++++++++++++++++++++++++++------------ 1 files changed, 63 insertions(+), 20 deletions(-) diff --git a/src/qemu/qemu_conf.c b/src/qemu/qemu_conf.c index 389db7b..3d83a8f 100644 --- a/src/qemu/qemu_conf.c +++ b/src/qemu/qemu_conf.c @@ -1797,6 +1797,13 @@ static char *qemuPCIAddressAsString(virDomainDeviceInfoPtr dev) { char *addr; + if (dev->addr.pci.domain != 0 || + dev->addr.pci.bus != 0) { + qemudReportError(NULL, NULL, NULL, VIR_ERR_INTERNAL_ERROR, "%s", + _("Only PCI domain 0 and bus 0 are available")); + return NULL; + } + if (virAsprintf(&addr, "%d:%d:%d", dev->addr.pci.domain, dev->addr.pci.bus, @@ -1817,6 +1824,8 @@ static int qemuCollectPCIAddress(virDomainDefPtr def ATTRIBUTE_UNUSED, if (dev->type == VIR_DOMAIN_DEVICE_ADDRESS_TYPE_PCI) { char *addr = qemuPCIAddressAsString(dev); + VIR_DEBUG("Remembering PCI addr %s", addr); + if (virHashAddEntry(addrs->used, addr, addr) < 0) { VIR_FREE(addr); return -1; @@ -1858,6 +1867,8 @@ int qemuDomainPCIAddressReserveAddr(qemuDomainPCIAddressSetPtr addrs, if (!addr) return -1; + VIR_DEBUG("Reserving PCI addr %s", addr); + if (virHashLookup(addrs->used, addr)) { qemudReportError(NULL, NULL, NULL, VIR_ERR_INTERNAL_ERROR, _("unable to reserve PCI address %s"), addr); @@ -1870,6 +1881,9 @@ int qemuDomainPCIAddressReserveAddr(qemuDomainPCIAddressSetPtr addrs, return -1; } + if (dev->addr.pci.slot > addrs->nextslot) + addrs->nextslot = dev->addr.pci.slot + 1; + return 0; } @@ -1947,6 +1961,8 @@ int qemuDomainPCIAddressSetNextAddr(qemuDomainPCIAddressSetPtr addrs, addr = qemuPCIAddressAsString(&maybe); + VIR_DEBUG("Allocating PCI addr %s", addr); + if (virHashLookup(addrs->used, addr)) { VIR_FREE(addr); continue; @@ -1981,12 +1997,13 @@ qemuAssignDevicePCISlots(virDomainDefPtr def, qemuDomainPCIAddressSetPtr addrs) /* Host bridge */ if (qemuDomainPCIAddressReserveSlot(addrs, 0) < 0) goto error; - /* PIIX3 (ISA bridge, IDE controller, something else unknown, USB controller) */ - if (qemuDomainPCIAddressReserveSlot(addrs, 1) < 0) - goto error; - /* VGA */ - if (qemuDomainPCIAddressReserveSlot(addrs, 2) < 0) - goto error; + + /* PIIX3 (ISA bridge, IDE controller, something else unknown, USB controller) + * at slot 1....reserve it later + */ + + /* VGA at slot 2.... reserve it later */ + /* VirtIO Balloon */ if (qemuDomainPCIAddressReserveSlot(addrs, 3) < 0) goto error; @@ -2033,23 +2050,34 @@ qemuAssignDevicePCISlots(virDomainDefPtr def, qemuDomainPCIAddressSetPtr addrs) goto error; } for (i = 0; i < def->nvideos ; i++) { - if (def->videos[i]->info.type != VIR_DOMAIN_DEVICE_ADDRESS_TYPE_NONE) - continue; /* First VGA is hardcoded slot=2 */ if (i == 0) { - def->videos[i]->info.type = VIR_DOMAIN_DEVICE_ADDRESS_TYPE_PCI; - def->videos[i]->info.addr.pci.domain = 0; - def->videos[i]->info.addr.pci.bus = 0; - def->videos[i]->info.addr.pci.slot = 2; - def->videos[i]->info.addr.pci.function = 0; + if (def->videos[i]->info.type == VIR_DOMAIN_DEVICE_ADDRESS_TYPE_PCI) { + if (def->videos[i]->info.addr.pci.domain != 0 || + def->videos[i]->info.addr.pci.bus != 0 || + def->videos[i]->info.addr.pci.slot != 2 || + def->videos[i]->info.addr.pci.function != 0) { + qemudReportError(NULL, NULL, NULL, VIR_ERR_INTERNAL_ERROR, "%s", + _("Primary video card must have PCI address 0:0:2.0")); + goto error; + } + } else { + def->videos[i]->info.type = VIR_DOMAIN_DEVICE_ADDRESS_TYPE_PCI; + def->videos[i]->info.addr.pci.domain = 0; + def->videos[i]->info.addr.pci.bus = 0; + def->videos[i]->info.addr.pci.slot = 2; + def->videos[i]->info.addr.pci.function = 0; + if (qemuDomainPCIAddressReserveSlot(addrs, 2) < 0) + goto error; + }

} else { + if (def->videos[i]->info.type != VIR_DOMAIN_DEVICE_ADDRESS_TYPE_NONE) + continue; if (qemuDomainPCIAddressSetNextAddr(addrs, &def->videos[i]->info) < 0) goto error; } } for (i = 0; i < def->ncontrollers ; i++) { - if (def->controllers[i]->info.type != VIR_DOMAIN_DEVICE_ADDRESS_TYPE_NONE) - continue; /* FDC lives behind the ISA bridge */ if (def->controllers[i]->type == VIR_DOMAIN_CONTROLLER_TYPE_FDC) continue; @@ -2057,12 +2085,27 @@ qemuAssignDevicePCISlots(virDomainDefPtr def, qemuDomainPCIAddressSetPtr addrs) /* First IDE controller lives on the PIIX3 at slot=1, function=1 */ if (def->controllers[i]->type == VIR_DOMAIN_CONTROLLER_TYPE_IDE && def->controllers[i]->idx == 0) { - def->controllers[i]->info.type = VIR_DOMAIN_DEVICE_ADDRESS_TYPE_PCI; - def->controllers[i]->info.addr.pci.domain = 0; - def->controllers[i]->info.addr.pci.bus = 0; - def->controllers[i]->info.addr.pci.slot = 1; - def->controllers[i]->info.addr.pci.function = 1; + if (def->controllers[i]->info.type == VIR_DOMAIN_DEVICE_ADDRESS_TYPE_PCI) { + if (def->videos[i]->info.addr.pci.domain != 0 || + def->videos[i]->info.addr.pci.bus != 0 || + def->videos[i]->info.addr.pci.slot != 2 || + def->videos[i]->info.addr.pci.function != 0) { + qemudReportError(NULL, NULL, NULL, VIR_ERR_INTERNAL_ERROR, "%s", + _("Primary IDE controller must have PCI address 0:0:1.1")); + goto error; + } + } else { + def->controllers[i]->info.type = VIR_DOMAIN_DEVICE_ADDRESS_TYPE_PCI; + def->controllers[i]->info.addr.pci.domain = 0; + def->controllers[i]->info.addr.pci.bus = 0; + def->controllers[i]->info.addr.pci.slot = 1; + def->controllers[i]->info.addr.pci.function = 1; + if (qemuDomainPCIAddressReserveSlot(addrs, 1) < 0) + goto error; + } } else { + if (def->controllers[i]->info.type != VIR_DOMAIN_DEVICE_ADDRESS_TYPE_NONE) + continue; if (qemuDomainPCIAddressSetNextAddr(addrs, &def->controllers[i]->info) < 0) goto error; }