+#elif defined(__linux__) && defined(__s390x__)
+std::string sys::getHostCPUName() {
+ // STIDP is a privileged operation, so use /proc/cpuinfo instead.
+ // Note: We cannot mmap /proc/cpuinfo here and then process the resulting
+ // memory buffer because the 'file' has 0 size (it can be read from only
+ // as a stream).
+
+ std::string Err;
+ DataStreamer *DS = getDataFileStreamer("/proc/cpuinfo", &Err);
+ if (!DS) {
+ DEBUG(dbgs() << "Unable to open /proc/cpuinfo: " << Err << "\n");
+ return "generic";
+ }
+
+ // The "processor 0:" line comes after a fair amount of other information,
+ // including a cache breakdown, but this should be plenty.
+ char buffer[2048];
+ size_t CPUInfoSize = DS->GetBytes((unsigned char*) buffer, sizeof(buffer));
+ delete DS;
+
+ StringRef Str(buffer, CPUInfoSize);
+ SmallVector<StringRef, 32> Lines;
+ Str.split(Lines, "\n");
+ for (unsigned I = 0, E = Lines.size(); I != E; ++I) {
+ if (Lines[I].startswith("processor ")) {
+ size_t Pos = Lines[I].find("machine = ");
+ if (Pos != StringRef::npos) {
+ Pos += sizeof("machine = ") - 1;
+ unsigned int Id;
+ if (!Lines[I].drop_front(Pos).getAsInteger(10, Id)) {
+ if (Id >= 2827)
+ return "zEC12";
+ if (Id >= 2817)
+ return "z196";
+ }
+ }
+ break;
+ }
+ }
+
+ return "generic";
+}
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