[libvirt][PATCH v7 2/5] qemu: Add command-line to generate SGX EPC memory backend
From: Lin Yang <lin.a.yang(a)intel.com>
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;
diff --git a/src/qemu/qemu_domain.c b/src/qemu/qemu_domain.c
index 8e151d1fd5..7a535f0002 100644
--- a/src/qemu/qemu_domain.c
+++ b/src/qemu/qemu_domain.c
@@ -9078,13 +9078,20 @@ int
qemuDomainDefValidateMemoryHotplug(const virDomainDef *def,
const virDomainMemoryDef *mem)
{
- unsigned int nmems = def->nmems;
+ unsigned int nmems = 0;
unsigned long long hotplugSpace;
unsigned long long hotplugMemory = 0;
size_t i;
hotplugSpace = def->mem.max_memory - virDomainDefGetMemoryInitial(def);
+ for (i = 0; i < def->nmems; i++) {
+ if (def->mems[i]->model == VIR_DOMAIN_MEMORY_MODEL_DIMM ||
+ def->mems[i]->model == VIR_DOMAIN_MEMORY_MODEL_NVDIMM ||
+ def->mems[i]->model == VIR_DOMAIN_MEMORY_MODEL_VIRTIO_PMEM)
+ nmems++;
+ }
+
if (mem) {
nmems++;
hotplugMemory = mem->size;
--
2.17.1