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gem5/src/cpu
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Andreas Sandberg 0d6009e8dc kvm: Add support for multi-system simulation 
The introduction of parallel event queues added most of the support
needed to run multiple VMs (systems) within the same gem5
instance. This changeset fixes up signal delivery so that KVM's
control signals are delivered to the thread that executes the CPU's
event queue. Specifically:

  * Timers and counters are now initialized from a separate method
    (startupThread) that is scheduled as the first event in the
    thread-specific event queue. This ensures that they are
    initialized from the thread that is going to execute the CPUs
    event queue and enables signal delivery to the right thread when
    exiting from KVM.

  * The POSIX-timer-based KVM timer (used to force exits from KVM) has
    been updated to deliver signals to the thread that's executing KVM
    instead of the process (thread is undefined in that case). This
    assumes that the timer is instantiated from the thread that is
    going to execute the KVM vCPU.

  * Signal masking is now done using pthread_sigmask instead of
    sigprocmask. The behavior of the latter is undefined in threaded
    applications.

  * Since signal masks can be inherited, make sure to actively unmask
    the control signals when setting up the KVM signal mask.

There are currently no facilities to multiplex between multiple KVM
CPUs in the same event queue, we are therefore limited to
configurations where there is only one KVM CPU per event queue. In
practice, this means that multi-system configurations can be
simulated, but not multiple CPUs in a shared-memory configuration.
2014-02-20 15:43:53 +01:00
..
checker checker: CheckerCPU handling of MiscRegs was incorrect 2014-01-24 15:29:30 -06:00
inorder arch, cpu: Add support for flattening misc register indexes. 2014-01-24 15:29:30 -06:00
kvm kvm: Add support for multi-system simulation 2014-02-20 15:43:53 +01:00
nocpu SCons: Support building without an ISA 2010-11-19 18:00:39 -06:00
o3 checker: CheckerCPU handling of MiscRegs was incorrect 2014-01-24 15:29:30 -06:00
ozone cpu: add consistent guarding to *_impl.hh files. 2013-10-17 10:20:45 -05:00
pred cpu: add consistent guarding to *_impl.hh files. 2013-10-17 10:20:45 -05:00
simple cpu: simple: Add support for using branch predictors 2014-02-09 20:49:28 +01:00
testers cpu: fix bug when TrafficGen deschedules event 2014-01-29 22:35:04 -06:00
activity.cc Fix: Address a few benign memory leaks 2012-07-09 12:35:30 -04:00
activity.hh Fix: Address a few benign memory leaks 2012-07-09 12:35:30 -04:00
base.cc sim: simulate with multiple threads and event queues 2013-11-25 11:21:00 -06:00
base.hh cpu: Add CPU support for generatig wake up events when LLSC adresses are snooped. 2014-01-24 15:29:30 -06:00
base_dyn_inst.hh cpu: Add CPU support for generatig wake up events when LLSC adresses are snooped. 2014-01-24 15:29:30 -06:00
base_dyn_inst_impl.hh cpu: Add support for instructions that zero cache lines. 2014-01-24 15:29:30 -06:00
BaseCPU.py arm: Add support for ARMv8 (AArch64 & AArch32) 2014-01-24 15:29:34 -06:00
CheckerCPU.py sim: Include object header files in SWIG interfaces 2012-11-02 11:32:01 -05:00
cpuevent.cc
cpuevent.hh includes: sort all includes 2011-04-15 10:44:06 -07:00
decode_cache.hh ISA,CPU: Generalize and split out the components of the decode cache. 2012-05-26 13:45:12 -07:00
dummy_checker.cc sim: Add the notion of clock domains to all ClockedObjects 2013-06-27 05:49:49 -04:00
dummy_checker.hh cpu: Add header files for checker CPUs 2012-11-02 11:32:01 -05:00
DummyChecker.py cpu: Make checker CPUs inherit from CheckerCPU in the Python hierarchy 2013-02-15 17:40:08 -05:00
exec_context.hh SE/FS: Expose the same methods on the CPUs in SE and FS modes. 2011-11-01 04:01:13 -07:00
exetrace.cc debug : Fixes the issue wherein Debug symbols were not getting dumped into trace files for SE mode 2013-07-15 11:08:34 -04:00
exetrace.hh trace: reimplement the DTRACE function so it doesn't use a vector 2011-04-15 10:44:32 -07:00
ExeTracer.py sim: Include object header files in SWIG interfaces 2012-11-02 11:32:01 -05:00
func_unit.cc params: Deprecate old-style constructors; update most SimObject constructors. 2007-08-30 15:16:59 -04:00
func_unit.hh Param: Transition to Cycles for relevant parameters 2012-09-07 12:34:38 -04:00
FuncUnit.py sim: Include object header files in SWIG interfaces 2012-11-02 11:32:01 -05:00
inst_seq.hh build: fix compile problems pointed out by gcc 4.4 2009-11-04 16:57:01 -08:00
inteltrace.cc gcc: Clean-up of non-C++0x compliant code, first steps 2012-03-19 06:36:09 -04:00
inteltrace.hh sim: Include object header files in SWIG interfaces 2012-11-02 11:32:01 -05:00
IntelTrace.py sim: Include object header files in SWIG interfaces 2012-11-02 11:32:01 -05:00
intr_control.cc SE/FS: Get rid of FULL_SYSTEM in the CPU directory. 2011-11-18 01:33:28 -08:00
intr_control.hh arch: Header clean up for NOISA resurrection 2013-09-04 13:22:55 -04:00
intr_control_noisa.cc arch: Resurrect the NOISA build target and rename it NULL 2013-09-04 13:22:57 -04:00
IntrControl.py sim: Include object header files in SWIG interfaces 2012-11-02 11:32:01 -05:00
legiontrace.cc Decoder: Remove the thread context get/set from the decoder. 2013-01-04 19:00:45 -06:00
legiontrace.hh scons: Add warning for missing declarations 2013-02-19 05:56:07 -05:00
LegionTrace.py sim: Include object header files in SWIG interfaces 2012-11-02 11:32:01 -05:00
m5legion_interface.h add fsr to the list of registers we are interested in 2007-01-30 18:27:04 -05:00
nativetrace.cc trace: reimplement the DTRACE function so it doesn't use a vector 2011-04-15 10:44:32 -07:00
nativetrace.hh clang: Enable compiling gem5 using clang 2.9 and 3.0 2012-01-31 12:05:52 -05:00
NativeTrace.py sim: Include object header files in SWIG interfaces 2012-11-02 11:32:01 -05:00
op_class.hh CPU/ARM: Add SIMD op classes to CPU models and ARM ISA. 2010-11-15 14:04:04 -06:00
pc_event.cc arm: Enable support for triggering a sim panic on kernel panics 2013-04-22 13:20:31 -04:00
pc_event.hh arm: Enable support for triggering a sim panic on kernel panics 2013-04-22 13:20:31 -04:00
profile.cc includes: sort all includes 2011-04-15 10:44:06 -07:00
profile.hh includes: sort all includes 2011-04-15 10:44:06 -07:00
quiesce_event.cc trace: reimplement the DTRACE function so it doesn't use a vector 2011-04-15 10:44:32 -07:00
quiesce_event.hh clang: Enable compiling gem5 using clang 2.9 and 3.0 2012-01-31 12:05:52 -05:00
reg_class.cc cpu: add a condition-code register class 2013-10-15 14:22:44 -04:00
reg_class.hh cpu: add a condition-code register class 2013-10-15 14:22:44 -04:00
SConscript cpu: clean up architectural register classification 2013-10-15 14:22:42 -04:00
simple_thread.cc x86, cpu: corrects 270c9a75e91f, take over decoder on cpu switch 2013-01-22 00:10:10 -06:00
simple_thread.hh arch, cpu: Add support for flattening misc register indexes. 2014-01-24 15:29:30 -06:00
smt.hh includes: fix up code after sorting 2011-04-15 10:44:14 -07:00
static_inst.cc Decode: Pull instruction decoding out of the StaticInst class into its own. 2011-09-09 02:30:01 -07:00
static_inst.hh cpu: add a condition-code register class 2013-10-15 14:22:44 -04:00
static_inst_fwd.hh StaticInst: Merge StaticInst and StaticInstBase. 2011-09-09 02:40:11 -07:00
thread_context.cc cpu: add a condition-code register class 2013-10-15 14:22:44 -04:00
thread_context.hh arch, cpu: Add support for flattening misc register indexes. 2014-01-24 15:29:30 -06:00
thread_state.cc mem: Set the cache line size on a system level 2013-07-18 08:31:16 -04:00
thread_state.hh cpu: added assertions to ensure the correct proxies are used 2012-07-10 22:51:53 -07:00
timebuf.hh Move sched_list.hh and timebuf.hh from src/base to src/cpu. 2011-01-03 14:35:47 -08:00
translation.hh mem: track per-request latencies and access depths in the cache hierarchy 2014-01-24 15:29:30 -06:00