diff options
Diffstat (limited to 'lib/Support')
-rw-r--r-- | lib/Support/Host.cpp | 42 |
1 files changed, 42 insertions, 0 deletions
diff --git a/lib/Support/Host.cpp b/lib/Support/Host.cpp index 12df08c6c0..6a5d4d28a9 100644 --- a/lib/Support/Host.cpp +++ b/lib/Support/Host.cpp @@ -535,6 +535,48 @@ std::string sys::getHostCPUName() { return "generic"; } +#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"; +} #else std::string sys::getHostCPUName() { return "generic"; |