/*
- * Copyright (c) 2011-2014 ARM Limited
+ * Copyright (c) 2011-2014,2017-2019 ARM Limited
* All rights reserved
*
* The license below extends only to copyright in the software and shall
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
- *
- * Authors: Steve Reinhardt
- * Lisa Hsu
- * Nathan Binkert
- * Ali Saidi
- * Rick Strong
*/
+#include "sim/system.hh"
+
+#include <algorithm>
+
#include "arch/remote_gdb.hh"
#include "arch/utility.hh"
#include "base/loader/object_file.hh"
#include "base/loader/symtab.hh"
#include "base/str.hh"
#include "base/trace.hh"
+#include "config/use_kvm.hh"
+#if USE_KVM
+#include "cpu/kvm/base.hh"
+#include "cpu/kvm/vm.hh"
+#endif
+#include "cpu/base.hh"
#include "cpu/thread_context.hh"
#include "debug/Loader.hh"
#include "debug/WorkItems.hh"
#include "sim/byteswap.hh"
#include "sim/debug.hh"
#include "sim/full_system.hh"
-#include "sim/system.hh"
+#include "sim/redirect_path.hh"
/**
* To avoid linking errors with LTO, only include the header if we
*/
#if THE_ISA != NULL_ISA
#include "kern/kernel_stats.hh"
+
#endif
using namespace std;
int System::numSystemsRunning = 0;
System::System(Params *p)
- : MemObject(p), _systemPort("system_port", this),
- _numContexts(0),
+ : SimObject(p), _systemPort("system_port", this),
+ multiThread(p->multi_thread),
pagePtr(0),
init_param(p->init_param),
physProxy(_systemPort, p->cache_line_size),
- kernelSymtab(nullptr),
- kernel(nullptr),
- loadAddrMask(p->load_addr_mask),
- loadAddrOffset(p->load_offset),
- nextPID(0),
- physmem(name() + ".physmem", p->memories),
+ workload(p->workload),
+#if USE_KVM
+ kvmVM(p->kvm_vm),
+#else
+ kvmVM(nullptr),
+#endif
+ physmem(name() + ".physmem", p->memories, p->mmap_using_noreserve),
memoryMode(p->mem_mode),
_cacheLineSize(p->cache_line_size),
workItemsBegin(0),
workItemsEnd(0),
numWorkIds(p->num_work_ids),
+ thermalModel(p->thermal_model),
_params(p),
+ _m5opRange(p->m5ops_base ?
+ RangeSize(p->m5ops_base, 0x10000) :
+ AddrRange(1, 0)), // Create an empty range if disabled
totalNumInsts(0),
- instEventQueue("system instruction-based event queue")
+ redirectPaths(p->redirect_paths)
{
+ if (workload)
+ workload->system = this;
+
// add self to global system list
systemList.push_back(this);
- if (FullSystem) {
- kernelSymtab = new SymbolTable;
- if (!debugSymbolTable)
- debugSymbolTable = new SymbolTable;
+#if USE_KVM
+ if (kvmVM) {
+ kvmVM->setSystem(this);
}
+#endif
// check if the cache line size is a value known to work
if (!(_cacheLineSize == 16 || _cacheLineSize == 32 ||
// Get the generic system master IDs
MasterID tmp_id M5_VAR_USED;
- tmp_id = getMasterId("writebacks");
+ tmp_id = getMasterId(this, "writebacks");
assert(tmp_id == Request::wbMasterId);
- tmp_id = getMasterId("functional");
+ tmp_id = getMasterId(this, "functional");
assert(tmp_id == Request::funcMasterId);
- tmp_id = getMasterId("interrupt");
+ tmp_id = getMasterId(this, "interrupt");
assert(tmp_id == Request::intMasterId);
- if (FullSystem) {
- if (params()->kernel == "") {
- inform("No kernel set for full system simulation. "
- "Assuming you know what you're doing\n");
- } else {
- // Get the kernel code
- kernel = createObjectFile(params()->kernel);
- inform("kernel located at: %s", params()->kernel);
-
- if (kernel == NULL)
- fatal("Could not load kernel file %s", params()->kernel);
-
- // setup entry points
- kernelStart = kernel->textBase();
- kernelEnd = kernel->bssBase() + kernel->bssSize();
- kernelEntry = kernel->entryPoint();
-
- // load symbols
- if (!kernel->loadGlobalSymbols(kernelSymtab))
- fatal("could not load kernel symbols\n");
-
- if (!kernel->loadLocalSymbols(kernelSymtab))
- fatal("could not load kernel local symbols\n");
-
- if (!kernel->loadGlobalSymbols(debugSymbolTable))
- fatal("could not load kernel symbols\n");
-
- if (!kernel->loadLocalSymbols(debugSymbolTable))
- fatal("could not load kernel local symbols\n");
-
- // Loading only needs to happen once and after memory system is
- // connected so it will happen in initState()
- }
- }
-
- // increment the number of running systms
+ // increment the number of running systems
numSystemsRunning++;
// Set back pointers to the system in all memories
System::~System()
{
- delete kernelSymtab;
- delete kernel;
-
for (uint32_t j = 0; j < numWorkIds; j++)
delete workItemStats[j];
}
panic("System port on %s is not connected.\n", name());
}
-BaseMasterPort&
-System::getMasterPort(const std::string &if_name, PortID idx)
+void
+System::startup()
+{
+ SimObject::startup();
+
+ // Now that we're about to start simulation, wait for GDB connections if
+ // requested.
+#if THE_ISA != NULL_ISA
+ for (auto *tc: threadContexts) {
+ auto *cpu = tc->getCpuPtr();
+ auto id = tc->contextId();
+ if (remoteGDB.size() <= id)
+ continue;
+ auto *rgdb = remoteGDB[id];
+
+ if (cpu->waitForRemoteGDB()) {
+ inform("%s: Waiting for a remote GDB connection on port %d.\n",
+ cpu->name(), rgdb->port());
+
+ rgdb->connect();
+ }
+ }
+#endif
+}
+
+Port &
+System::getPort(const std::string &if_name, PortID idx)
{
// no need to distinguish at the moment (besides checking)
return _systemPort;
void
System::setMemoryMode(Enums::MemoryMode mode)
{
- assert(getDrainState() == Drainable::Drained);
+ assert(drainState() == DrainState::Drained);
memoryMode = mode;
}
return false;
}
-/**
- * Setting rgdb_wait to a positive integer waits for a remote debugger to
- * connect to that context ID before continuing. This should really
- be a parameter on the CPU object or something...
- */
-int rgdb_wait = -1;
-
-int
-System::registerThreadContext(ThreadContext *tc, int assigned)
+ContextID
+System::registerThreadContext(ThreadContext *tc, ContextID assigned)
{
- int id;
- if (assigned == -1) {
- for (id = 0; id < threadContexts.size(); id++) {
- if (!threadContexts[id])
- break;
- }
-
- if (threadContexts.size() <= id)
- threadContexts.resize(id + 1);
- } else {
- if (threadContexts.size() <= assigned)
- threadContexts.resize(assigned + 1);
- id = assigned;
+ int id = assigned;
+ if (id == InvalidContextID) {
+ // Find an unused context ID for this thread.
+ id = 0;
+ while (id < threadContexts.size() && threadContexts[id])
+ id++;
}
- if (threadContexts[id])
- fatal("Cannot have two CPUs with the same id (%d)\n", id);
+ if (threadContexts.size() <= id)
+ threadContexts.resize(id + 1);
+
+ fatal_if(threadContexts[id],
+ "Cannot have two CPUs with the same id (%d)\n", id);
threadContexts[id] = tc;
- _numContexts++;
+ for (auto *e: liveEvents)
+ tc->schedule(e);
#if THE_ISA != NULL_ISA
int port = getRemoteGDBPort();
if (port) {
- RemoteGDB *rgdb = new RemoteGDB(this, tc);
- GDBListener *gdbl = new GDBListener(rgdb, port + id);
- gdbl->listen();
-
- if (rgdb_wait != -1 && rgdb_wait == id)
- gdbl->accept();
+ RemoteGDB *rgdb = new RemoteGDB(this, tc, port + id);
+ rgdb->listen();
- if (remoteGDB.size() <= id) {
+ if (remoteGDB.size() <= id)
remoteGDB.resize(id + 1);
- }
remoteGDB[id] = rgdb;
}
return id;
}
-int
-System::numRunningContexts()
+ThreadContext *
+System::findFreeContext()
{
- int running = 0;
- for (int i = 0; i < _numContexts; ++i) {
- if (threadContexts[i]->status() != ThreadContext::Halted)
- ++running;
+ for (auto &it : threadContexts) {
+ if (ThreadContext::Halted == it->status())
+ return it;
}
- return running;
+ return nullptr;
}
-void
-System::initState()
-{
- if (FullSystem) {
- for (int i = 0; i < threadContexts.size(); i++)
- TheISA::startupCPU(threadContexts[i], i);
- // Moved from the constructor to here since it relies on the
- // address map being resolved in the interconnect
- /**
- * Load the kernel code into memory
- */
- if (params()->kernel != "") {
- if (params()->kernel_addr_check) {
- // Validate kernel mapping before loading binary
- if (!(isMemAddr((kernelStart & loadAddrMask) +
- loadAddrOffset) &&
- isMemAddr((kernelEnd & loadAddrMask) +
- loadAddrOffset))) {
- fatal("Kernel is mapped to invalid location (not memory). "
- "kernelStart 0x(%x) - kernelEnd 0x(%x) %#x:%#x\n",
- kernelStart,
- kernelEnd, (kernelStart & loadAddrMask) +
- loadAddrOffset,
- (kernelEnd & loadAddrMask) + loadAddrOffset);
- }
- }
- // Load program sections into memory
- kernel->loadSections(physProxy, loadAddrMask, loadAddrOffset);
-
- DPRINTF(Loader, "Kernel start = %#x\n", kernelStart);
- DPRINTF(Loader, "Kernel end = %#x\n", kernelEnd);
- DPRINTF(Loader, "Kernel entry = %#x\n", kernelEntry);
- DPRINTF(Loader, "Kernel loaded...\n");
- }
- }
+bool
+System::schedule(PCEvent *event)
+{
+ bool all = true;
+ liveEvents.push_back(event);
+ for (auto *tc: threadContexts)
+ all = tc->schedule(event) && all;
+ return all;
+}
+
+bool
+System::remove(PCEvent *event)
+{
+ bool all = true;
+ liveEvents.remove(event);
+ for (auto *tc: threadContexts)
+ all = tc->remove(event) && all;
+ return all;
+}
- activeCpus.clear();
+int
+System::numRunningContexts()
+{
+ return std::count_if(
+ threadContexts.cbegin(),
+ threadContexts.cend(),
+ [] (ThreadContext* tc) {
+ return ((tc->status() != ThreadContext::Halted) &&
+ (tc->status() != ThreadContext::Halting));
+ }
+ );
}
void
-System::replaceThreadContext(ThreadContext *tc, int context_id)
+System::replaceThreadContext(ThreadContext *tc, ContextID context_id)
{
if (context_id >= threadContexts.size()) {
panic("replaceThreadContext: bad id, %d >= %d\n",
context_id, threadContexts.size());
}
+ for (auto *e: liveEvents) {
+ threadContexts[context_id]->remove(e);
+ tc->schedule(e);
+ }
threadContexts[context_id] = tc;
if (context_id < remoteGDB.size())
remoteGDB[context_id]->replaceThreadContext(tc);
}
+bool
+System::validKvmEnvironment() const
+{
+#if USE_KVM
+ if (threadContexts.empty())
+ return false;
+
+ for (auto tc : threadContexts) {
+ if (dynamic_cast<BaseKvmCPU*>(tc->getCpuPtr()) == nullptr) {
+ return false;
+ }
+ }
+ return true;
+#else
+ return false;
+#endif
+}
+
Addr
System::allocPhysPages(int npages)
{
Addr return_addr = pagePtr << PageShift;
pagePtr += npages;
+
+ Addr next_return_addr = pagePtr << PageShift;
+
+ if (_m5opRange.contains(next_return_addr)) {
+ warn("Reached m5ops MMIO region\n");
+ return_addr = 0xffffffff;
+ pagePtr = 0xffffffff >> PageShift;
+ }
+
if ((pagePtr << PageShift) > physmem.totalSize())
fatal("Out of memory, please increase size of physical memory.");
return return_addr;
return physmem.isMemAddr(addr);
}
-unsigned int
-System::drain(DrainManager *dm)
-{
- setDrainState(Drainable::Drained);
- return 0;
-}
-
void
System::drainResume()
{
- Drainable::drainResume();
totalNumInsts = 0;
}
void
-System::serialize(ostream &os)
+System::serialize(CheckpointOut &cp) const
{
- if (FullSystem)
- kernelSymtab->serialize("kernel_symtab", os);
SERIALIZE_SCALAR(pagePtr);
- SERIALIZE_SCALAR(nextPID);
- serializeSymtab(os);
// also serialize the memories in the system
- nameOut(os, csprintf("%s.physmem", name()));
- physmem.serialize(os);
+ physmem.serializeSection(cp, "physmem");
}
void
-System::unserialize(Checkpoint *cp, const string §ion)
+System::unserialize(CheckpointIn &cp)
{
- if (FullSystem)
- kernelSymtab->unserialize("kernel_symtab", cp, section);
UNSERIALIZE_SCALAR(pagePtr);
- UNSERIALIZE_SCALAR(nextPID);
- unserializeSymtab(cp, section);
// also unserialize the memories in the system
- physmem.unserialize(cp, csprintf("%s.physmem", name()));
+ physmem.unserializeSection(cp, "physmem");
}
void
System::regStats()
{
+ SimObject::regStats();
+
for (uint32_t j = 0; j < numWorkIds ; j++) {
workItemStats[j] = new Stats::Histogram();
stringstream namestr;
System::printSystems();
}
+std::string
+System::stripSystemName(const std::string& master_name) const
+{
+ if (startswith(master_name, name())) {
+ return master_name.substr(name().size());
+ } else {
+ return master_name;
+ }
+}
+
MasterID
-System::getMasterId(std::string master_name)
+System::lookupMasterId(const SimObject* obj) const
{
- // strip off system name if the string starts with it
- if (startswith(master_name, name()))
- master_name = master_name.erase(0, name().size() + 1);
+ MasterID id = Request::invldMasterId;
+
+ // number of occurrences of the SimObject pointer
+ // in the master list.
+ auto obj_number = 0;
+
+ for (int i = 0; i < masters.size(); i++) {
+ if (masters[i].obj == obj) {
+ id = i;
+ obj_number++;
+ }
+ }
+
+ fatal_if(obj_number > 1,
+ "Cannot lookup MasterID by SimObject pointer: "
+ "More than one master is sharing the same SimObject\n");
+
+ return id;
+}
+
+MasterID
+System::lookupMasterId(const std::string& master_name) const
+{
+ std::string name = stripSystemName(master_name);
+
+ for (int i = 0; i < masters.size(); i++) {
+ if (masters[i].masterName == name) {
+ return i;
+ }
+ }
+
+ return Request::invldMasterId;
+}
+
+MasterID
+System::getGlobalMasterId(const std::string& master_name)
+{
+ return _getMasterId(nullptr, master_name);
+}
+
+MasterID
+System::getMasterId(const SimObject* master, std::string submaster)
+{
+ auto master_name = leafMasterName(master, submaster);
+ return _getMasterId(master, master_name);
+}
+
+MasterID
+System::_getMasterId(const SimObject* master, const std::string& master_name)
+{
+ std::string name = stripSystemName(master_name);
// CPUs in switch_cpus ask for ids again after switching
- for (int i = 0; i < masterIds.size(); i++) {
- if (masterIds[i] == master_name) {
+ for (int i = 0; i < masters.size(); i++) {
+ if (masters[i].masterName == name) {
return i;
}
}
"You must do so in init().\n");
}
- masterIds.push_back(master_name);
+ // Generate a new MasterID incrementally
+ MasterID master_id = masters.size();
- return masterIds.size() - 1;
+ // Append the new Master metadata to the group of system Masters.
+ masters.emplace_back(master, name, master_id);
+
+ return masters.back().masterId;
+}
+
+std::string
+System::leafMasterName(const SimObject* master, const std::string& submaster)
+{
+ if (submaster.empty()) {
+ return master->name();
+ } else {
+ // Get the full master name by appending the submaster name to
+ // the root SimObject master name
+ return master->name() + "." + submaster;
+ }
}
std::string
System::getMasterName(MasterID master_id)
{
- if (master_id >= masterIds.size())
+ if (master_id >= masters.size())
fatal("Invalid master_id passed to getMasterName()\n");
- return masterIds[master_id];
+ const auto& master_info = masters[master_id];
+ return master_info.masterName;
}
System *
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