Re: [libvirt][PATCH v4 2/4] 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:     -object memory-backend-epc,id=mem1,size=<epc_size>K,prealloc \     -sgx-epc id=epc1,memdev=mem1 ---  src/qemu/qemu_command.c | 24 ++++++++++++++++++++++++  1 file changed, 24 insertions(+) diff --git a/src/qemu/qemu_command.c b/src/qemu/qemu_command.c index 01812cd39b..2c3785886c 100644 --- a/src/qemu/qemu_command.c +++ b/src/qemu/qemu_command.c @@ -9869,6 +9869,27 @@ qemuBuildVsockCommandLine(virCommandPtr cmd,  }     +static int +qemuBuildSGXCommandLine(virCommandPtr cmd, virDomainSGXDefPtr sgx) +{ +    g_auto(virBuffer) buf = VIR_BUFFER_INITIALIZER; + +    if (!sgx) +        return 0; + +    VIR_DEBUG("sgx->epc_size=%lluKiB", sgx->epc_size); + +    virBufferAsprintf(&buf, "memory-backend- epc,id=mem1,size=%lluK,prealloc", sgx->epc_size); +    virCommandAddArg(cmd, "-object"); +    virCommandAddArgBuffer(cmd, &buf);

+ +    virCommandAddArg(cmd, "-sgx-epc"); +    virCommandAddArg(cmd, "id=epc1,memdev=mem1"); + +    return 0; +} + +  /*   * Constructs a argv suitable for launching qemu with config defined   * for a given virtual machine. @@ -10154,6 +10175,9 @@ qemuBuildCommandLine(virQEMUDriverPtr driver,          cfg->logTimestamp)          virCommandAddArgList(cmd, "-msg", "timestamp=on", NULL);   +    if (qemuBuildSGXCommandLine(cmd, def->sgx) < 0) +        return NULL; +

     return g_steal_pointer(&cmd);  }