Re: [libvirt][PATCH v7 2/5] qemu: Add command-line to generate SGX EPC memory backend

From: Lin Yang <lin.a.yang(a)intel.com&gt; According to the result parsing from xml, add the argument of SGX EPC memory backend into QEMU command line: #qemu-system-x86_64 \ ...... \ -object memory-backend-epc,id=mem1,size=64M,prealloc=on \ -object memory-backend-epc,id=mem2,size=28M \ -M sgx-epc.0.memdev=mem1,sgx-epc.1.memdev=mem2 --- src/qemu/qemu_alias.c | 3 ++- src/qemu/qemu_command.c | 38 ++++++++++++++++++++++++++++++++++---- src/qemu/qemu_domain.c | 9 ++++++++- 3 files changed, 44 insertions(+), 6 deletions(-) diff --git a/src/qemu/qemu_alias.c b/src/qemu/qemu_alias.c index 5990fc5f87..53eb30b81f 100644 --- a/src/qemu/qemu_alias.c +++ b/src/qemu/qemu_alias.c @@ -476,7 +476,8 @@ qemuDeviceMemoryGetAliasID(virDomainDef *def, int maxidx = 0; /* virtio-pmem goes onto PCI bus and thus DIMM address is not valid */ - if (!oldAlias && mem->model != VIR_DOMAIN_MEMORY_MODEL_VIRTIO_PMEM) + if (!oldAlias && mem->model != VIR_DOMAIN_MEMORY_MODEL_VIRTIO_PMEM && + mem->model != VIR_DOMAIN_MEMORY_MODEL_SGX_EPC) return mem->info.addr.dimm.slot; for (i = 0; i < def->nmems; i++) { diff --git a/src/qemu/qemu_command.c b/src/qemu/qemu_command.c index 24572d03d7..11bce51e82 100644 --- a/src/qemu/qemu_command.c +++ b/src/qemu/qemu_command.c @@ -3117,6 +3117,10 @@ qemuBuildMemoryBackendProps(virJSONValue **backendProps, if (systemMemory) disableCanonicalPath = true; + } else if (mem->model == VIR_DOMAIN_MEMORY_MODEL_SGX_EPC) { + backendType = "memory-backend-epc"; + if (!priv->memPrealloc) + prealloc = true; } else { backendType = "memory-backend-ram"; } @@ -7565,6 +7569,8 @@ qemuBuildMemoryDeviceCommandLine(virCommand *cmd, qemuDomainObjPrivate *priv) { size_t i; + g_auto(virBuffer) epcBuf = VIR_BUFFER_INITIALIZER; + int epcNum = 0; /* memory hotplug requires NUMA to be enabled - we already checked * that memory devices are present only when NUMA is */ @@ -7578,12 +7584,36 @@ qemuBuildMemoryDeviceCommandLine(virCommand *cmd, virCommandAddArg(cmd, "-object"); virCommandAddArgBuffer(cmd, &buf); - if (!(dimmStr = qemuBuildMemoryDeviceStr(def, def->mems[i], priv->qemuCaps))) - return -1; + switch ((virDomainMemoryModel) def->mems[i]->model) { + case VIR_DOMAIN_MEMORY_MODEL_NVDIMM: + case VIR_DOMAIN_MEMORY_MODEL_DIMM: + case VIR_DOMAIN_MEMORY_MODEL_VIRTIO_PMEM: + if (!(dimmStr = qemuBuildMemoryDeviceStr(def, def->mems[i], priv->qemuCaps))) + return -1; + + virCommandAddArgList(cmd, "-device", dimmStr, NULL); + + VIR_FREE(dimmStr); + break; + + case VIR_DOMAIN_MEMORY_MODEL_SGX_EPC: + if (virBufferUse(&epcBuf) > 0) + virBufferAddChar(&epcBuf, ','); - virCommandAddArgList(cmd, "-device", dimmStr, NULL); + virBufferAsprintf(&epcBuf, "sgx-epc.%d.memdev=%s", epcNum++, + g_strdup_printf("mem%s", def->mems[i]->info.alias)); + + break;

+ + case VIR_DOMAIN_MEMORY_MODEL_NONE: + case VIR_DOMAIN_MEMORY_MODEL_LAST: + break; + } + } - VIR_FREE(dimmStr); + if (virBufferUse(&epcBuf) > 0) { + virCommandAddArg(cmd, "-M"); + virCommandAddArgBuffer(cmd, &epcBuf);

} return 0;