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qemu: Add a check for slot and base dimm address conflicts
When hotplugging a memory device, there wasn't a check to determine if there is a conflict with the address space being used by the to be added memory device and any existing device which is disallowed by qemu. This patch adds a check to ensure the new device address doesn't conflict with any existing device. Signed-off-by: Luyao Huang <lhuang@redhat.com>
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@ -4957,6 +4957,40 @@ qemuBuildMemoryDimmBackendStr(virDomainMemoryDefPtr mem,
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}
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static bool
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qemuCheckMemoryDimmConflict(virDomainDefPtr def,
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virDomainMemoryDefPtr mem)
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{
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size_t i;
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for (i = 0; i < def->nmems; i++) {
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virDomainMemoryDefPtr tmp = def->mems[i];
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if (tmp == mem ||
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tmp->info.type != VIR_DOMAIN_DEVICE_ADDRESS_TYPE_DIMM)
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continue;
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if (mem->info.addr.dimm.slot == tmp->info.addr.dimm.slot) {
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virReportError(VIR_ERR_CONFIG_UNSUPPORTED,
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_("memory device slot '%u' is already being "
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"used by another memory device"),
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mem->info.addr.dimm.slot);
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return true;
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}
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if (mem->info.addr.dimm.base != 0 &&
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mem->info.addr.dimm.base == tmp->info.addr.dimm.base) {
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virReportError(VIR_ERR_CONFIG_UNSUPPORTED,
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_("memory device base '0x%llx' is already being "
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"used by another memory device"),
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mem->info.addr.dimm.base);
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return true;
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}
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}
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return false;
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}
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char *
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qemuBuildMemoryDeviceStr(virDomainMemoryDefPtr mem,
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virDomainDefPtr def,
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@ -4998,6 +5032,9 @@ qemuBuildMemoryDeviceStr(virDomainMemoryDefPtr mem,
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mem->targetNode, mem->info.alias, mem->info.alias);
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if (mem->info.type == VIR_DOMAIN_DEVICE_ADDRESS_TYPE_DIMM) {
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if (qemuCheckMemoryDimmConflict(def, mem))
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return NULL;
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virBufferAsprintf(&buf, ",slot=%d", mem->info.addr.dimm.slot);
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virBufferAsprintf(&buf, ",addr=%llu", mem->info.addr.dimm.base);
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}
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