Andreas Sandberg [Mon, 27 Feb 2017 13:17:51 +0000 (13:17 +0000)]
power: Avoid forward declarations that confuse wrappers
The Python wrappers get confused by the forward declarations in the
power framework. This changeset restructures the code slightly to
avoid the troublesome forward declarations.
Change-Id: Id8c93224f1988edb5fdf9d3abc6237f2f688c02d
Signed-off-by: Andreas Sandberg <andreas.sandberg@arm.com>
Reviewed-by: Andreas Hansson <andreas.hansson@arm.com>
Reviewed-by: Curtis Dunham <curtis.dunham@arm.com>
Reviewed-by: Sascha Bischoff <sascha.bischoff@arm.com>
Reviewed-on: https://gem5-review.googlesource.com/2227
Reviewed-by: Pierre-Yves Péneau <pierre-yves.peneau@lirmm.fr>
Reviewed-by: Jason Lowe-Power <jason@lowepower.com>
Maintainer: Jason Lowe-Power <jason@lowepower.com>
Sudhanshu Jha [Wed, 1 Mar 2017 17:38:51 +0000 (17:38 +0000)]
dev, arm: Render HDLCD frames at a fixed rate in KVM
Use the new fast scan-out API in the PixelPump to render frames at a
fixed frame rate in KVM mode. The refresh rate when running in KVM can
be controlled by the virt_refresh_rate parameter.
Change-Id: Ib3c78f174e3f8f4ca8a9b723c4e5d311a433b8aa
Signed-off-by: Andreas Sandberg <andreas.sandberg@arm.com>
Reviewed-on: https://gem5-review.googlesource.com/2242
Reviewed-by: Rahul Thakur <rjthakur@google.com>
Sudhanshu Jha [Fri, 24 Feb 2017 13:34:22 +0000 (13:34 +0000)]
dev: Add support for single-pass scan out in the PixelPump
Add a helper function to scan out an entire frame in one time
step. This requires the public PixelPump to be changed somewhat to
separate timing updates from general PixelPump control. Instead of
calling PixelPump::start(timings), timings now need to be updated
using a separate call to PixelPump::updateTimings(timings) before
calling PixelPump::start().
Display controllers that don't need accurate timing (e.g., in KVM
mode), can use the new PixelPump::renderFrame() API to render an
entire frame in one step. This call results in the same callbacks
(e.g., calls to nextPixel()) as the timing calls, but they all happen
in immediately. Unlike the timing counterpart, renderFrame() doesn't
support buffer underruns and will panic if nextPixle() indicates an
underrun.
Change-Id: I76c84db04249b02d4207c5281d82aa693d0881be
Signed-off-by: Andreas Sandberg <andreas.sandberg@arm.com>
Reviewed-on: https://gem5-review.googlesource.com/2241
Reviewed-by: Rahul Thakur <rjthakur@google.com>
Reviewed-by: Jason Lowe-Power <jason@lowepower.com>
Sudhanshu Jha [Mon, 27 Feb 2017 10:29:56 +0000 (10:29 +0000)]
dev, kvm: Add a fast KVM-aware mode in DmaReadFifo
Use a fast, functional, read operations keep the DMA FIFO full when
running in KVM mode.
Change-Id: I5b378c2fb6a1d3e687cef15e807e63a0a53a60e2
Signed-off-by: Andreas Sandberg <andreas.sandberg@arm.com>
Reviewed-on: https://gem5-review.googlesource.com/2226
Reviewed-by: Rahul Thakur <rjthakur@google.com>
Reviewed-by: Jason Lowe-Power <jason@lowepower.com>
Maintainer: Jason Lowe-Power <jason@lowepower.com>
Sudhanshu Jha [Mon, 27 Feb 2017 10:29:56 +0000 (10:29 +0000)]
arm, kmi: Clear interrupts in KMI devices
Added functionality to check and clear interrupts for KMI
devices. This fixes a boot bug when using KVM and in-kernel GIC
emulation.
Change-Id: Ia3e91d07567b7faf3f82b0adfda4a165a502a339
Signed-off-by: Andreas Sandberg <andreas.sandberg@arm.com>
Reviewed-on: https://gem5-review.googlesource.com/2225
Reviewed-by: Rahul Thakur <rjthakur@google.com>
Brandon Potter [Wed, 1 Mar 2017 17:10:28 +0000 (11:10 -0600)]
syscall-emul: Remove unused class and member
The WaitRec structure in the Process class is unnecessary. There
is a member declaration inside of the Process class, waitList,
that uses the WaitRec definition. However, waitList is unused so
they are both dead bits of code. This changeset removes both the
WaitRec struct and waitList member from Process.
Change-Id: Ia6ee7488b9f47fd0f0ae29c818fba6ea0710699c
Reviewed-on: https://gem5-review.googlesource.com/2262
Reviewed-by: Tony Gutierrez <anthony.gutierrez@amd.com>
Reviewed-by: Michael LeBeane <Michael.Lebeane@amd.com>
Reviewed-by: Andreas Sandberg <andreas.sandberg@arm.com>
Maintainer: Jason Lowe-Power <jason@lowepower.com>
Nikos Nikoleris [Mon, 31 Oct 2016 12:02:24 +0000 (12:02 +0000)]
mem: Make blkAlign a common function between all tag classes
blkAlign was defined as a separate function in the base associative
and fully-associative tags classes although both functions implemented
identical functionality. This patch moves the blkAlign in the base
tags class.
Change-Id: I3d415d0e62bddeec7ce0d559667e40a8c5fdc2d4
Reviewed-by: Andreas Sandberg <andreas.sandberg@arm.com>
Reviewed-by: Andreas Hansson <andreas.hansson@arm.com>
Nikos Nikoleris [Wed, 26 Oct 2016 10:07:27 +0000 (11:07 +0100)]
mem: Use pkt::getBlockAddr instead of BaseCace::blockAlign
Change-Id: I0ed4e528cb750a323facdc811dde7f0ed1ff228e
Reviewed-by: Andreas Sandberg <andreas.sandberg@arm.com>
Reviewed-by: Andreas Hansson <andreas.hansson@arm.com>
Rahul Thakur [Wed, 1 Mar 2017 18:27:05 +0000 (10:27 -0800)]
arm, kvm: enable running 32-bit Guest under ARM KVM64
1) Pass KVM_ARM_VCPU_EL1_32BIT to kvmArmVCpuInit
when running 32-bit OS
2) Correctly map 64-bit registers to banked 32-bit ones
Change-Id: I1dec6427d6f5c3bba599ccdd804f1dfe80d3e670
Reviewed-on: https://gem5-review.googlesource.com/2261
Maintainer: Rahul Thakur <rjthakur@google.com>
Reviewed-by: Andreas Sandberg <andreas.sandberg@arm.com>
Rahul Thakur [Wed, 1 Mar 2017 18:15:57 +0000 (10:15 -0800)]
arm, kvm: fix saving/restoring conditional flags in ARM KVM64
The gem5 stores flags separately from other fields CPSR, so we need to
split them out and recombine on trips to/from KVM.
Change-Id: I28ed00eb6f0e2a1436adfbc51b6ccf056958afeb
Reviewed-on: https://gem5-review.googlesource.com/2260
Reviewed-by: Rahul Thakur <rjthakur@google.com>
Maintainer: Rahul Thakur <rjthakur@google.com>
Pierre-Yves Péneau [Thu, 23 Feb 2017 09:12:05 +0000 (10:12 +0100)]
config: exit with fatal() if error
If output redirection is activated, the error message is printed in
simout. This change ensure it will be printed in simerr.
Change-Id: Ie661ac6b6978bf2e4aaaccdf23134795d764d459
Signed-off-by: Pierre-Yves Péneau <pierre-yves.peneau@lirmm.fr>
Reviewed-on: https://gem5-review.googlesource.com/2221
Reviewed-by: Andreas Sandberg <andreas.sandberg@arm.com>
Reviewed-by: Jason Lowe-Power <jason@lowepower.com>
Maintainer: Andreas Sandberg <andreas.sandberg@arm.com>
Lena Olson [Sun, 5 Feb 2017 20:47:37 +0000 (14:47 -0600)]
ruby: fix and/or precedence in slicc
The slicc compiler currently treats && and || with the same precedence.
This is highly non-intuitive to people used to C, and was probably an
error. This patch makes && bind tighter than ||.
For example, previously:
if (A || B && C)
compiled to:
if ((A || B) && C)
With this patch, it compiles to:
if (A || (B && C))
Change-Id: Idbbd5b50cc86a8d6601045adc14a253284d7b791
Signed-off-by: Lena Olson (leolson@google.com)
Reviewed-on: https://gem5-review.googlesource.com/2168
Reviewed-by: Jason Lowe-Power <jason@lowepower.com>
Reviewed-by: Joe Gross <criusx@gmail.com>
Reviewed-by: Sooraj Puthoor <puthoorsooraj@gmail.com>
Maintainer: Jason Lowe-Power <jason@lowepower.com>
[ Rebased onto master ]
Signed-off-by: Andreas Sandberg <andreas.sandberg@arm.com>
Andreas Sandberg [Sun, 5 Feb 2017 05:00:38 +0000 (05:00 +0000)]
scons: Automatically add a git commit message hook
Gerrit requires that all commit messages have a Change-Id tag. This
tag is added automatically by a commit message hook in Git. Include
the default Gerrit commit message hook and add it automatically using
scons to make life easier for everyone.
Change-Id: I1270fbaaadf6ed151bddf14521a38e0c1a02d131
Signed-off-by: Andreas Sandberg <andreas.sandberg@arm.com>
Reviewed-on: https://gem5-review.googlesource.com/2166
Reviewed-by: Jason Lowe-Power <power.jg@gmail.com>
Maintainer: Jason Lowe-Power <power.jg@gmail.com>
Brandon Potter [Mon, 27 Feb 2017 19:10:15 +0000 (14:10 -0500)]
syscall_emul: [PATCH 15/22] add clone/execve for threading and multiprocess simulations
Modifies the clone system call and adds execve system call. Requires allowing
processes to steal thread contexts from other processes in the same system
object and the ability to detach pieces of process state (such as MemState)
to allow dynamic sharing.
Brandon Potter [Mon, 27 Feb 2017 19:10:02 +0000 (14:10 -0500)]
syscall_emul: [patch 14/22] adds identifier system calls
This changeset add fields to the process object and adds the following
three system calls: setpgid, gettid, getpid.
Brandon Potter [Mon, 27 Feb 2017 19:09:30 +0000 (14:09 -0500)]
x86: remove unnecessary parameter from functions
Tony Gutierrez [Mon, 27 Feb 2017 18:18:51 +0000 (13:18 -0500)]
gpu-compute: remove unnecessary member from class
The clang compiler complains that the wavefront member in
the GpuISA class is unused. This changeset removes the member,
because it does not appear serve a purpose.
Brandon Potter [Mon, 27 Feb 2017 18:18:38 +0000 (13:18 -0500)]
gpu-compute: mark functions with override if replacing virtual
The clang compiler is more stringent than the recent versions of
GCC when dealing with overrides. This changeset adds the specifier
to the methods which need it to silence the compiler.
Andreas Sandberg [Mon, 27 Feb 2017 12:06:00 +0000 (12:06 +0000)]
arch: Include generated decoder header after normal headers
The generated decoder header defines macros that represent bit fields
within instructions. These fields typically have short names that
conflict with names in other header files. Include the generated
header after all normal header to avoid this issue.
Change-Id: I53d149b75432c20abdbf651e32c3c785d897973b
Signed-off-by: Andreas Sandberg <andreas.sandberg@arm.com>
Reviewed-by: Curtis Dunham <curtis.dunham@arm.com>
Reviewed-by: Jason Lowe-Power <jason@lowepower.com>
Andreas Sandberg [Mon, 27 Feb 2017 11:25:01 +0000 (11:25 +0000)]
base: Refactor logging to make log level selection cleaner
It's currently possible to change the log level in gem5 by tweaking a
set of global variables. These variables are currently exposed to
Python using SWIG. This mechanism is far from ideal for two reasons:
First, changing the log level requires that the Python world enables
or disables individual levels. Ideally, this should be a single call
where a log level is selected. Second, exporting global variables is
poorly supported by most Python frameworks. SWIG puts variables in
their own namespace and PyBind doesn't seem to support it at all.
This changeset refactors the logging code to create a more abstract
interface. Each log level is associated with an instance of a Logger
class. This class contains common functionality, an enable flag, and a
verbose flag.
Available LogLevels are described by the LogLevel class. Lower log
levels are used for more critical messages (PANIC being level 0) and
higher levels for less critical messages. The highest log level that
is printed is controlled by calling Logger:setLevel().
Change-Id: I31e44299d242d953197a8e62679250c91d6ef776
Signed-off-by: Andreas Sandberg <andreas.sandberg@arm.com>
Reviewed-by: Gabor Dozsa <gabor.dozsa@arm.com>
Reviewed-by: Curtis Dunham <curtis.dunham@arm.com>
Reviewed-by: Jason Lowe-Power <jason@lowepower.com>
Andreas Sandberg [Mon, 27 Feb 2017 11:25:00 +0000 (11:25 +0000)]
tests: Disable descriptions in stat files
Don't output verbose text descriptions in stat files when running
tests. This saves a lot of space when storing reference data.
Change-Id: I2a7ead4843586e800ecf83846694b73f0c356373
Signed-off-by: Andreas Sandberg <andreas.sandberg@arm.com>
Reviewed-by: Nikos Nikoleris <nikos.nikoleris@arm.com>
Reviewed-by: Sascha Bischoff <sascha.bischoff@arm.com>
Reviewed-by: Curtis Dunham <curtis.dunham@arm.com>
Reviewed-by: Jason Lowe-Power <jason@lowepower.com>
Reviewed-by: Tony Gutierrez <anthony.gutierrez@amd.com>
Andreas Sandberg [Mon, 27 Feb 2017 11:24:59 +0000 (11:24 +0000)]
python: Add a generalized mechanism to configure stats
Add a mechanism to configure the stat output format using a URL-like
syntax. This makes it possible to specify both an output format
(currently, only text is supported) and override default
parameters.
On the Python-side, this is implemented using a helper function
(m5.stats.addStatVisitor) that adds a visitor to the list of active
stat visitors. The helper function parses a URL-like stat
specification to determine the stat output type. Optional parameters
can be specified to change how stat visitors behave.
For example, to output stats in text format without stat descriptions:
m5.stats.addStatVisitor("text://stats.txt?desc=False")
From the command line:
gem5.opt --stats-file="text://stats.txt?desc=False"
Internally, the stat framework uses the _url_factory decorator
to wrap a Python function with the fn(path, **kwargs) signature in a
function that takes a parsed URL as its only argument. The path and
keyword arguments are automatically derived from the URL in the
wrapper function.
New output formats can be registered in the m5.stats.factories
dictionary. This dictionary contains a mapping between format names
(URL schemes) and factory methods.
To retain backwards compatibility, the code automatically assumes that
the user wants text output if no format has been specified (i.e., when
specifying a plain path).
Change-Id: Ic4dce93ab4ead07ffdf71e55a22ba0ae5a143061
Signed-off-by: Andreas Sandberg <andreas.sandberg@arm.com>
Reviewed-by: Curtis Dunham <curtis.dunham@arm.com>
Reviewed-by: Sascha Bischoff <sascha.bischoff@arm.com>
Reviewed-by: Ilias Vougioukas <ilias.vougioukas@arm.com>
Reviewed-by: Jason Lowe-Power <jason@lowepower.com>
Reviewed-by: Tony Gutierrez <anthony.gutierrez@amd.com>
Brandon Potter [Mon, 20 Jul 2015 14:15:21 +0000 (09:15 -0500)]
syscall_emul: [patch 13/22] add system call retry capability
This changeset adds functionality that allows system calls to retry without
affecting thread context state such as the program counter or register values
for the associated thread context (when system calls return with a retry
fault).
This functionality is needed to solve problems with blocking system calls
in multi-process or multi-threaded simulations where information is passed
between processes/threads. Blocking system calls can cause deadlock because
the simulator itself is single threaded. There is only a single thread
servicing the event queue which can cause deadlock if the thread hits a
blocking system call instruction.
To illustrate the problem, consider two processes using the producer/consumer
sharing model. The processes can use file descriptors and the read and write
calls to pass information to one another. If the consumer calls the blocking
read system call before the producer has produced anything, the call will
block the event queue (while executing the system call instruction) and
deadlock the simulation.
The solution implemented in this changeset is to recognize that the system
calls will block and then generate a special retry fault. The fault will
be sent back up through the function call chain until it is exposed to the
cpu model's pipeline where the fault becomes visible. The fault will trigger
the cpu model to replay the instruction at a future tick where the call has
a chance to succeed without actually going into a blocking state.
In subsequent patches, we recognize that a syscall will block by calling a
non-blocking poll (from inside the system call implementation) and checking
for events. When events show up during the poll, it signifies that the call
would not have blocked and the syscall is allowed to proceed (calling an
underlying host system call if necessary). If no events are returned from the
poll, we generate the fault and try the instruction for the thread context
at a distant tick. Note that retrying every tick is not efficient.
As an aside, the simulator has some multi-threading support for the event
queue, but it is not used by default and needs work. Even if the event queue
was completely multi-threaded, meaning that there is a hardware thread on
the host servicing a single simulator thread contexts with a 1:1 mapping
between them, it's still possible to run into deadlock due to the event queue
barriers on quantum boundaries. The solution of replaying at a later tick
is the simplest solution and solves the problem generally.
Brandon Potter [Mon, 20 Jul 2015 14:15:21 +0000 (09:15 -0500)]
style: [patch 12/22] fix preliminary style issues for subsequent fault patch
This changeset add spaces in a few spots and removes an unnecessary comment.
Brandon Potter [Mon, 20 Jul 2015 14:15:21 +0000 (09:15 -0500)]
syscall_emul: [patch 11/22] extend functionality of fcntl
This changeset adds the ability to set a close-on-exec flag for a given
file descriptor. It also reworks some of the logic surrounding setting and
retrieving flags from the file description.
Brandon Potter [Thu, 23 Feb 2017 18:27:48 +0000 (13:27 -0500)]
x86: remove redundant condition check in tlb code
Brandon Potter [Thu, 23 Feb 2017 18:27:38 +0000 (13:27 -0500)]
base: fix small memory leak in the ELF loader
Nikos Nikoleris [Tue, 21 Feb 2017 14:14:45 +0000 (14:14 +0000)]
mem: Remove unused size field from the CacheBlk class
Change-Id: I6149290d6d2ac1a4bd6165871c93d7b7d6a980ad
Reviewed-by: Andreas Hansson <andreas.hansson@arm.com>
Signed-off-by: Andreas Sandberg <andreas.sandberg@arm.com>
Nikos Nikoleris [Tue, 21 Feb 2017 14:14:45 +0000 (14:14 +0000)]
mem: Remove the unused asid field from the CacheBlk class
Change-Id: I29f45733c5fad822bdd0d8dcc7939d86b2e8c97b
Reviewed-by: Andreas Hansson <andreas.hansson@arm.com>
Signed-off-by: Andreas Sandberg <andreas.sandberg@arm.com>
Nikos Nikoleris [Tue, 21 Feb 2017 14:14:44 +0000 (14:14 +0000)]
mem: Remove unused arguments (asid/contex_id) from accessBlock
Change-Id: I79c2662fc81630ab321db8a75be6cd15fa07d372
Reviewed-by: Andreas Hansson <andreas.hansson@arm.com>
Signed-off-by: Andreas Sandberg <andreas.sandberg@arm.com>
Nikos Nikoleris [Tue, 21 Feb 2017 14:14:44 +0000 (14:14 +0000)]
mem: Remove unused type BlkList from the cache and the tags
Change-Id: If9ebb8488e8db587482ecfa99d2c12cfe5734fb9
Reviewed-by: Andreas Hansson <andreas.hansson@arm.com>
Signed-off-by: Andreas Sandberg <andreas.sandberg@arm.com>
Nikos Nikoleris [Tue, 21 Feb 2017 14:14:44 +0000 (14:14 +0000)]
mem: Remove unused functions from the tag classes
Change-Id: I4f3c2c027b1acaaf791a4c71086f34a9b9fbf4df
Reviewed-by: Andreas Hansson <andreas.hansson@arm.com>
Signed-off-by: Andreas Sandberg <andreas.sandberg@arm.com>
Nikos Nikoleris [Tue, 21 Feb 2017 14:14:44 +0000 (14:14 +0000)]
mem: Always use the helper function to invalidate a block
Policies like the LRU need to be notified when a block is invalidated,
the helper function does this along with invalidating the block.
Change-Id: I3ed59cf07938caa7f394ee6054b0af9e00b267ea
Reviewed-by: Andreas Hansson <andreas.hansson@arm.com>
Signed-off-by: Andreas Sandberg <andreas.sandberg@arm.com>
Sascha Bischoff [Tue, 21 Feb 2017 14:14:44 +0000 (14:14 +0000)]
mem: Fix MSHR assert triggering for invalidated prefetches
This changeset updates an assert in src/mem/cache/mshr.cc which was
erroneously catching invalidated prefetch requests. These requests can
become invalidated if another component writes (an exclusive access)
to this location during the time that the read request is in
flight. The original assert made the assumption that these cases can
only occur for reads generated by the CPU, and hence
prefetcher-generated requests would sometimes trip the assert.
Change-Id: If4f043273a688c2bab8f7a641192a2b583e7b20e
Reviewed-by: Nikos Nikoleris <nikos.nikoleris@arm.com>
Signed-off-by: Andreas Sandberg <andreas.sandberg@arm.com>
Nikos Nikoleris [Tue, 21 Feb 2017 14:14:44 +0000 (14:14 +0000)]
mem: Populate the secure flag in the writeback visitor
Previously the writeback visitor would not consider and set the secure
flag for the blocks that are written back to memory. This patch fixes
this.
Change-Id: Ie1a425fa9211407a70a4343f2c6b3d073371378f
Reviewed-by: Andreas Hansson <andreas.hansson@arm.com>
Signed-off-by: Andreas Sandberg <andreas.sandberg@arm.com>
Nikos Nikoleris [Tue, 21 Feb 2017 14:14:44 +0000 (14:14 +0000)]
misc: Add dtb files to the ignore list for git and mercurial
Change-Id: Ifb135c60e050c55769914e853b07a387c06e4007
Reviewed-by: Curtis Dunham <curtis.dunham@arm.com>
Signed-off-by: Andreas Sandberg <andreas.sandberg@arm.com>
Nikos Nikoleris [Tue, 21 Feb 2017 14:14:44 +0000 (14:14 +0000)]
mem: Remove stale argument from a panic statement
Change-Id: I7ae5fa44a937f641a2ddd242a49e0cd23f68b9f2
Reviewed-by: Sudhanshu Jha <sudhanshu.jha@arm.com>
Reviewed-by: Curtis Dunham <curtis.dunham@arm.com>
Signed-off-by: Andreas Sandberg <andreas.sandberg@arm.com>
Nikos Nikoleris [Tue, 21 Feb 2017 14:14:44 +0000 (14:14 +0000)]
arm: Fix DPRINTFs with arguments in the instruction declarations
Change-Id: I0e373536897aa5bb4501b00945c2a0836100ddf4
Reviewed-by: Curtis Dunham <curtis.dunham@arm.com>
Signed-off-by: Andreas Sandberg <andreas.sandberg@arm.com>
Nikos Nikoleris [Tue, 21 Feb 2017 14:14:44 +0000 (14:14 +0000)]
arm: Blame the right instruction address on a Prefetch Abort
CPU models (e.g., O3CPU) issue instruction fetches for the whole cache
block rather than a specific instruction. Consequently the TLB lookups
translate the cache block virtual address. When the TLB lookup fails,
however, the Prefetch Abort must be raised for the PC of the
instruction that caused the fault rather than for the address of the
block.
This change fixes the way we instantiate the PrefetchAbort faults to
use the PC of the request rather the address of the instruction fetch
request.
Change-Id: I8e45549da1c3be55ad204a060029c95ce822a851
Reviewed-by: Curtis Dunham <curtis.dunham@arm.com>
Reviewed-by: Rekai Gonzalez Alberquilla <rekai.gonzalezalberquilla@arm.com>
Signed-off-by: Andreas Sandberg <andreas.sandberg@arm.com>
Andreas Hansson [Sun, 19 Feb 2017 10:30:32 +0000 (05:30 -0500)]
stats: Get all stats updated to reflect current behaviour
Line everything up again.
Andreas Hansson [Sun, 19 Feb 2017 10:30:31 +0000 (05:30 -0500)]
sim: Ensure draining is deterministic
The traversal of drainable objects could potentially be
non-deterministic when using an unordered set containing object
pointers. To ensure that the iteration is deterministic, we switch to
a vector. Note that the lookup and traversal of the drainable objects
is not performance critical, so the change has no negative consequences.
Andreas Hansson [Sun, 19 Feb 2017 10:30:31 +0000 (05:30 -0500)]
mem: Ensure deferred snoops are cache-line aligned
This patch fixes a bug where a deferred snoop ended up being to a
partial cache line, and not cache-line aligned, all due to how we copy
the packet.
Andreas Hansson [Sun, 19 Feb 2017 10:30:31 +0000 (05:30 -0500)]
mem: Fix memory footprint includes
Fix compilation errors due to missing include.
Brandon Potter [Wed, 9 Nov 2016 20:27:42 +0000 (14:27 -0600)]
syscall_emul: [patch 10/22] refactor fdentry and add fdarray class
Several large changes happen in this patch.
The FDEntry class is rewritten so that file descriptors now correspond to
types: 'File' which is normal file-backed file with the file open on the
host machine, 'Pipe' which is a pipe that has been opened on the host machine,
and 'Device' which does not have an open file on the host yet acts as a pseudo
device with which to issue ioctls. Other types which might be added in the
future are directory entries and sockets (off the top of my head).
The FDArray class was create to hold most of the file descriptor handling
that was stuffed into the Process class. It uses shared pointers and
the std::array type to hold the FDEntries mentioned above.
The changes to these two classes needed to be propagated out to the rest
of the code so there were quite a few changes for that. Also, comments were
added where I thought they were needed to help others and extend our
DOxygen coverage.
Brandon Potter [Wed, 9 Nov 2016 20:27:42 +0000 (14:27 -0600)]
syscall_emul: [patch 9/22] remove unused global variable (num_processes)
Brandon Potter [Wed, 9 Nov 2016 20:27:41 +0000 (14:27 -0600)]
syscall_emul: [patch 8/22] refactor process class
Moves aux_vector into its own .hh and .cc files just to get it out of the
already crowded Process files. Arguably, it could stay there, but it's
probably better just to move it and give it files.
The changeset looks ugly around the Process header file, but the goal here is
to move methods and members around so that they're not defined randomly
throughout the entire header file. I expect this is likely one of the reasons
why I several unused variables related to this class. So, the methods are
declared first followed by members. I've tried to aggregate them together
so that similar entries reside near one another.
There are other changes coming to this code so this is by no means the
final product.
Brandon Potter [Wed, 9 Nov 2016 20:27:41 +0000 (14:27 -0600)]
syscall_emul: [patch 7/22] remove numCpus method
The numCpus method is misleading in that it's not really a measure of
how many CPUs might be executing a process, but how many thread contexts
are assigned to the process at any given point in time.
It's nice to highlight this distinction because thread contexts are never
reused in the same way that a CPU can be reused for multiple processes.
The reason that there is no reuse is that there is no CPU scheduler for SE.
The tru64 code intends to use this method and the accompanying contextIDs
field to support SMT and track the number of threads with some system calls.
With the up coming clone and exec patches, this paradigm must change. There
needs to be a 1:1 mapping between the thread contexts and processes so that
the process state between threads is allowed to vary when needed by Linux.
This should not break SMT for tru64 if the Process class is refactored so that
multiple Processes can share state between themselves. The following patches
will do the refactoring incrementally as features are added.
Brandon Potter [Wed, 9 Nov 2016 20:27:41 +0000 (14:27 -0600)]
syscall_emul: [patch 6/22] remove unused fields from Process class
It looks like tru64 has some nxm* system calls, but the two fields that
are defined in the Process class are unused by any of the code. There doesn't
appear to be any reference in the tru64 code.
Brandon Potter [Wed, 9 Nov 2016 20:27:40 +0000 (14:27 -0600)]
syscall_emul: [patch 5/22] remove LiveProcess class and use Process instead
The EIOProcess class was removed recently and it was the only other class
which derived from Process. Since every Process invocation is also a
LiveProcess invocation, it makes sense to simplify the organization by
combining the fields from LiveProcess into Process.
Brandon Potter [Fri, 17 Feb 2017 17:01:51 +0000 (12:01 -0500)]
sparc: fix bugs caused by
cd7f3a1dbf55
Turns out that SPARC SE mode relied on M5_pid being "0" in
all cases. The entries in the SPARC TLBs are accessed with
M5_pid as their context. This is buggy in the sense that it
will never work with more than one process or any
initialization that doesn't have the M5_pid value passed in
as "0".
cd7f3a1dbf55 broke the SPARC build because it deletes M5_pid
and uses a _pid with a default of "100" instead. This caused
the SPARC TLB to never return any valid lookups for any
request; the program never moved past the first instruction
with SPARC SE in the regression tester.
The solution proposed in this changeset is to initialize
the address space identification register with the PID value
that is passed into the process class as a parameter from
Python. This should return the correct responses from the TLB
since the insertions and lookups into the page table will be
using the same PID.
Furthermore, there are corner cases in the code which elevate
privileges and revert to using context "0" as the context in
the TLB. I believe that these are related to kernel level
traps and hypervisor privilege escalations, but I'm not
completely sure. I've tried to address the corner cases
properly, but it would be beneficial to have someone who is
familiar with the SPARC architecture to take a look at this
fix.
Brandon Potter [Fri, 17 Feb 2017 17:01:50 +0000 (12:01 -0500)]
sim: fix out-of-bounds error in syscall_desc
Pierre-Yves Péneau [Wed, 15 Feb 2017 20:59:06 +0000 (14:59 -0600)]
mem, stats: fix typos in CommMonitor and Stats
Signed-off-by: Pierre-Yves Péneau <pierre-yves.peneau@lirmm.fr>
Reviewed-by: Tony Gutierrez <anthony.gutierrez@amd.com>
Reviewed-by: Jason Lowe-Power <jason@lowepower.com>
Signed-off-by: Jason Lowe-Power <jason@lowepower.com>
Reviewed at http://reviews.gem5.org/r/3802/
Pierre-Yves Péneau [Wed, 15 Feb 2017 20:56:54 +0000 (14:56 -0600)]
mem, misc: fix building issue with CommMonitor (unused variables)
Signed-off-by: Pierre-Yves Péneau <pierre-yves.peneau@lirmm.fr>
Reviewed-by: Andreas Hansson <andreas.hansson@arm.com>
Reviewed-by: Jason Lowe-Power <jason@lowepower.com>
Signed-off-by: Jason Lowe-Power <jason@lowepower.com>
Reviewed at http://reviews.gem5.org/r/3801/
Wendy Elsasser [Wed, 15 Feb 2017 15:28:44 +0000 (09:28 -0600)]
mem: fix assertion in respondEvent
Assertion in the respondEvent erroneously fired.
The assertion verifies that the controller has not moved to a low-power
state prior to receiving read data from the memory.
The original assertion triggered if the state was not:
PWR_IDLE or PWR_ACT.
In the case that failed, a periodic refresh event occurred around the
read. The REF is stalled until the final read burst is issued
and the subsequent PRE closes the bank. While the PRE will temporarily
move the state to PWR_IDLE, state will immediately transition to PWR_REF
due to the pending refresh operation. This state does not match the
assertion, which is subsequently triggered.
Fixed the assertion by explicitly checking that the state is not a low
power state
!PWR_SREF && !PWR_PRE_PDN && !PWR_ACT_PDN
Change-Id: I82921a733bbeac2bcb5a487c2f981448d41ed50b
Reviewed-by: Radhika Jagtap <radhika.jagtap@arm.com>
Gabor Dozsa [Tue, 14 Feb 2017 21:36:15 +0000 (15:36 -0600)]
arm,config: Add dist-gem5 support to the big.LITTLE(tm) config
This patch extends the example big.LITTLE configuration to enable
dist-gem5 simulations of big.LITTLE systems.
Change-Id: I49c095ab3c737b6a082f7c6f15f514c269217756
Reviewed-by: Andreas Sandberg <andreas.sandberg@arm.com>
Gabor Dozsa [Tue, 14 Feb 2017 21:09:18 +0000 (15:09 -0600)]
config: Refactor the network switch configuration file
This patch prevents the body of the script getting executed when
the script is imported as a module.
Change-Id: I70a50f6295f1e7a088398017f5fa9d06fe90476a
Reviewed-by: Andreas Sandberg <andreas.sandberg@arm.com>
Gabor Dozsa [Tue, 14 Feb 2017 21:09:18 +0000 (15:09 -0600)]
arm,config: Refactor the example big.LITTLE(tm) configuration
This patch prepares future extensions and customisation of the example
big.LITTLE configuration script. It breaks out the major phases into
functions so they can be called from other python scripts.
Change-Id: I2cb7c207c410fe14602cf17af7482719abba6c24
Reviewed-by: Andreas Sandberg <andreas.sandberg@arm.com>
Curtis Dunham [Tue, 14 Feb 2017 21:09:18 +0000 (15:09 -0600)]
arm, kvm: remove KvmGic
KvmGic functionality has been subsumed within the new MuxingKvmGic
model, which has Pl390 fallback when not using KVM for fast emulation.
This simplifies configuration and will enable checkpointing between
KVM emulation and full-system simulation.
Change-Id: Ie61251720064c512843015c075e4ac419a4081e8
Reviewed-by: Andreas Sandberg <andreas.sandberg@arm.com>
Andreas Sandberg [Tue, 14 Feb 2017 21:09:18 +0000 (15:09 -0600)]
arm, kvm: Automatically use the MuxingKvmGic
Automatically use the MuxingKvmGic in the VExpress_GEM5_V1
platform. This removes the need to patch the host kernel or the
platform configuration when using KVM on ARM.
Change-Id: Ib1ed9b3b849b80c449ef1b62b83748f3f54ada26
Reviewed-by: Curtis Dunham <curtis.dunham@arm.com>
Curtis Dunham [Tue, 14 Feb 2017 21:09:18 +0000 (15:09 -0600)]
arm, kvm: implement MuxingKvmGic
This device allows us to, when KVM support is detected and compiled in,
instantiate the same Gic device whether the actual simulation is with
KVM cores or simulated cores. Checkpointing is not yet supported.
Change-Id: I67e4e0b6fb7ab5058e52c933f4f3d8e7ab24981e
Reviewed-by: Andreas Sandberg <andreas.sandberg@arm.com>
Curtis Dunham [Tue, 14 Feb 2017 21:09:18 +0000 (15:09 -0600)]
sim, kvm: make KvmVM a System parameter
A KVM VM is typically a child of the System object already, but for
solving future issues with configuration graph resolution, the most
logical way to keep track of this object is for it to be an actual
parameter of the System object.
Change-Id: I965ded22203ff8667db9ca02de0042ff1c772220
Reviewed-by: Andreas Sandberg <andreas.sandberg@arm.com>
Curtis Dunham [Tue, 14 Feb 2017 21:09:18 +0000 (15:09 -0600)]
sim,kvm,arm: fix typos
Change-Id: Ifc65d42eebfd109c1c622c82c3c3b3e523819e85
Reviewed-by: Andreas Sandberg <andreas.sandberg@arm.com>
Wendy Elsasser [Tue, 14 Feb 2017 21:09:18 +0000 (15:09 -0600)]
mem: Update DRAM configuration names
Names of DRAM configurations were updated to reflect both
the channel and device data width.
Previous naming format was:
<DEVICE_TYPE>_<DATA_RATE>_<CHANNEL_WIDTH>
The following nomenclature is now used:
<DEVICE_TYPE>_<DATA_RATE>_<n>x<w>
where n = The number of devices per rank on the channel
x = Device width
Total channel width can be calculated by n*w
Example:
A 64-bit DDR4, 2400 channel consisting of 4-bit devices:
n = 16
w = 4
The resulting configuration name is:
DDR4_2400_16x4
Updated scripts to match new naming convention.
Added unique configurations for DDR4 for:
1) 16x4
2) 8x8
3) 4x16
Change-Id: Ibd7f763b7248835c624309143cb9fc29d56a69d1
Reviewed-by: Radhika Jagtap <radhika.jagtap@arm.com>
Reviewed-by: Curtis Dunham <curtis.dunham@arm.com>
Curtis Dunham [Tue, 14 Feb 2017 21:09:18 +0000 (15:09 -0600)]
tests: check for gem5 binary before tests
Provides a helpful error when tests.py is invoked without the gem5 binary.
Before:
Running 0 tests
After:
gem5 binary 'quick/...' not an executable file
Change-Id: I1566802206c9e21ca89bd03e91db22844168a085
Reviewed-by: Andreas Sandberg <andreas.sandberg@arm.com>
Curtis Dunham [Tue, 14 Feb 2017 21:09:18 +0000 (15:09 -0600)]
sim: allow forward dependencies in checkpoint upgraders
The notion of forward dependencies is just expressing the same
dependency but at the other end of the dependency edge, i.e. at
the dependee rather than the depender. As there is no more
'power' here, it's strictly a convenience feature for handling
dependencies with tags that are not in the upstream repository.
Change-Id: Ic7c68de6aff4094aaa12de62cdf690a5dc65ccb5
Reviewed-by: Andreas Sandberg <andreas.sandberg@arm.com>
Curtis Dunham [Tue, 14 Feb 2017 21:09:18 +0000 (15:09 -0600)]
sim: add support for checkpoint downgrading
This commit supports the use case of transitioning tags and their
associated checkpoint rewrites out of use for whatever reason. Just
replace the upgrader() method with a downgrader() method that performs
the appropriate inverse operation.
The tag name is still used, but only in this negative, 'zombie' state,
as it will be removed from the tags in the checkpoint and gem5 binary.
Change-Id: If9d26cccfe8449e026762b1a72f0c2ae5a9cf2d7
Reviewed-by: Andreas Sandberg <andreas.sandberg@arm.com>
Alec Roelke [Mon, 13 Feb 2017 20:26:05 +0000 (14:26 -0600)]
riscv: Remove ECALL tests from insttest
The system calls tested in rv64i.cpp in RISC-V's insttest suite have
different behavior depending on the operating system and file system they
are run on. This patch ignores the output of those tests and only
ensures that the instructions in RV64I complete successfully.
[Change deletion of ECALL test to block comment.]
[Restore ECALL test but remove test output to test only for completion
without error.]
[Update patch description and again try to push EMPTY files for rv64i
tests.]
Christian Menard [Mon, 13 Feb 2017 20:25:16 +0000 (14:25 -0600)]
misc: Clean up and complete the gem5<->SystemC-TLM bridge [6/10]
The current TLM bridge only provides a Slave Port that allows the gem5
world to send request to the SystemC world. This patch series refractors
and cleans up the existing code, and adds a Master Port that allows the
SystemC world to send requests to the gem5 world.
This patch:
* Update the README
Tushar Krishna [Sun, 12 Feb 2017 20:00:03 +0000 (15:00 -0500)]
ruby: fix round robin arbiter in garnet2.0
The rr arbiter pointer in garnet was getting updated on every request,
even if there is no grant. This was leading to a huge variance in wait
time at a router at high injection rates.
This patch corrects it to update upon a grant.
Bjoern A. Zeeb [Sat, 11 Feb 2017 16:11:48 +0000 (11:11 -0500)]
mem: fix printing of 1st cache tags line
Rather than having the 1st line on the Log line and every other line on its
own, add a new line to have a common format for all of them. Makes parsing
a lot easier.
Reviewed at http://reviews.gem5.org/r/3808/
Signed-off-by: Jason Lowe-Power <jason@lowepower.com>
Jason Lowe-Power [Fri, 10 Feb 2017 16:19:34 +0000 (11:19 -0500)]
x86: Fix implicit stack addressing in 64-bit mode
When in 64-bit mode, if the stack is accessed implicitly by an instruction
the alternate address prefix should be ignored if present.
This patch adds an extra flag to the ldstop which signifies when the
address override should be ignored. Then, for all of the affected
instructions, this patch adds two options to the ld and st opcode to use
the current stack addressing mode for all addresses and to ignore the
AddressSizeFlagBit. Finally, this patch updates the x86 TLB to not
truncate the address if it is in 64-bit mode and the IgnoreAddrSizeFlagBit
is set.
This fixes a problem when calling __libc_start_main with a binary that is
linked with a recent version of ld. This version of ld uses the address
override prefix (0x67) on the call instruction instead of a nop.
Note: This has not been tested in compatibility mode and only the call
instruction with the address override prefix has been tested.
See [1] page 9 (pdf page 45)
For instructions that are affected see [1] page 519 (pdf page 555).
[1] http://support.amd.com/TechDocs/24594.pdf
Signed-off-by: Jason Lowe-Power <jason@lowepower.com>
Jason Lowe-Power [Fri, 10 Feb 2017 15:00:18 +0000 (10:00 -0500)]
misc: Update #!env calls for python to explicit version
In some newer Linux distributions, env python default to Python 3.0. This
patch explicitly uses "python2" instead of just "python" for all scripts
that use #!
Reported-by: Sanchayan Maity <maitysanchayan@gmail.com>
Signed-off-by: Jason Lowe-Power <jason@lowepower.com>
Jason Lowe-Power [Fri, 10 Feb 2017 15:00:18 +0000 (10:00 -0500)]
misc: Add Python.h header to pyevents.hh
Signed-off-by: Jason Lowe-Power <jason@lowepower.com>
Christian Menard [Fri, 10 Feb 2017 00:15:51 +0000 (19:15 -0500)]
misc: Clean up and complete the gem5<->SystemC-TLM bridge [10/10]
The current TLM bridge only provides a Slave Port that allows the gem5
world to send request to the SystemC world. This patch series refractors
and cleans up the existing code, and adds a Master Port that allows the
SystemC world to send requests to the gem5 world.
This patch:
* Add callbacks for the Gem5SimControl that are called at before and
* after simulate()
Reviewed at http://reviews.gem5.org/r/3799/
Signed-off-by: Jason Lowe-Power <jason@lowepower.com>
Christian Menard [Fri, 10 Feb 2017 00:15:48 +0000 (19:15 -0500)]
misc: Clean up and complete the gem5<->SystemC-TLM bridge [9/10]
The current TLM bridge only provides a Slave Port that allows the gem5
world to send request to the SystemC world. This patch series refractors
and cleans up the existing code, and adds a Master Port that allows the
SystemC world to send requests to the gem5 world.
This patch:
* Pay for the header delay that the gem5 XBar annotates to packets.
Reviewed at http://reviews.gem5.org/r/3798/
Signed-off-by: Jason Lowe-Power <jason@lowepower.com>
Christian Menard [Fri, 10 Feb 2017 00:15:46 +0000 (19:15 -0500)]
misc: Clean up and complete the gem5<->SystemC-TLM bridge [8/10]
The current TLM bridge only provides a Slave Port that allows the gem5
world to send request to the SystemC world. This patch series refractors
and cleans up the existing code, and adds a Master Port that allows the
SystemC world to send requests to the gem5 world.
This patch:
* bugfix: The BEGIN_RESP also needs to be handled when END_REQ was
* skipped
and '&trans == blockingRequest && phase == tlm::BEGIN_RESP'
evaluates to true.
Reviewed at http://reviews.gem5.org/r/3797/
Signed-off-by: Jason Lowe-Power <jason@lowepower.com>
Christian Menard [Fri, 10 Feb 2017 00:15:43 +0000 (19:15 -0500)]
misc: Clean up and complete the gem5<->SystemC-TLM bridge [7/10]
The current TLM bridge only provides a Slave Port that allows the gem5
world to send request to the SystemC world. This patch series refractors
and cleans up the existing code, and adds a Master Port that allows the
SystemC world to send requests to the gem5 world.
This patch:
* Implement 'pipe through' for gem5 Packets (see explanation below)
Basically, this patch ensures that all transactions that originated in the
gem5 world are converted back to the original packet when entering the gem5
world. So far, this only worked for packets that are responded to by a
SyctemC component (e.g. when a gem5 CPU sends a request to a SystemC
memory). By implementing the 'pipe through' this patch ensures, that
packets that are responded to by a gem5 component (e.g. when a gem5 CPU
sends a request to a gem5 memory via a SystemC interconnect) are handled
properly.
Reviewed at http://reviews.gem5.org/r/3796/
Signed-off-by: Jason Lowe-Power <jason@lowepower.com>
Christian Menard [Fri, 10 Feb 2017 00:15:41 +0000 (19:15 -0500)]
misc: Clean up and complete the gem5<->SystemC-TLM bridge [5/10]
Changeset 11798:
3a490c57058d
---------------------------
misc: Clean up and complete the gem5<->SystemC-TLM bridge [5/10]
The current TLM bridge only provides a Slave Port that allows the gem5
world to send request to the SystemC world. This patch series refractors
and cleans up the existing code, and adds a Master Port that allows the
SystemC world to send requests to the gem5 world.
This patch:
* Introduce transactor modules that represent the gem5 ports in the
* SystemC world.
* Update the SimControl module and let it keep track of the gem5 ports.
Reviewed at http://reviews.gem5.org/r/3775/
Signed-off-by: Jason Lowe-Power <jason@lowepower.com>
Christian Menard [Fri, 10 Feb 2017 00:15:38 +0000 (19:15 -0500)]
misc: Clean up and complete the gem5<->SystemC-TLM bridge [4/10]
The current TLM bridge only provides a Slave Port that allows the gem5
world to send request to the SystemC world. This patch series refractors
and cleans up the existing code, and adds a Master Port that allows the
SystemC world to send requests to the gem5 world.
This patch:
* Move common code of the example to a common directory. Move the cli
* parsing from the SimControl module to a separate example object. Add
* comments describing the Gem5SimControl module.
Testing Done: Examples compile and run.
Reviewed at http://reviews.gem5.org/r/3695/
Signed-off-by: Jason Lowe-Power <jason@lowepower.com>
Christian Menard [Fri, 10 Feb 2017 00:15:35 +0000 (19:15 -0500)]
misc: Clean up and complete the gem5<->SystemC-TLM bridge [3/10]
The current TLM bridge only provides a Slave Port that allows the gem5
world to send request to the SystemC world. This patch series refractors
and cleans up the existing code, and adds a Master Port that allows the
SystemC world to send requests to the gem5 world.
This patch:
* Simplify the Slave Port by using a simple_initiator_socket.
Testing Done: Example applications are still running.
Reviewed at http://reviews.gem5.org/r/3686/
Signed-off-by: Jason Lowe-Power <jason@lowepower.com>
Christian Menard [Fri, 10 Feb 2017 00:15:33 +0000 (19:15 -0500)]
misc: Clean up and complete the gem5<->SystemC-TLM bridge [2/10]
The current TLM bridge only provides a Slave Port that allows the gem5
world to send request to the SystemC world. This patch series refractors
and cleans up the existing code, and adds a Master Port that allows the
SystemC world to send requests to the gem5 world.
This patch:
* Add the Master Port. Add an example application that isslustrates its
* use.
Testing Done: A simple example application consisting of a TLM traffic
generator and a gem5 memory is part of the patch.
Reviewed at http://reviews.gem5.org/r/3528/
Signed-off-by: Jason Lowe-Power <jason@lowepower.com>
Christian Menard [Fri, 10 Feb 2017 00:15:30 +0000 (19:15 -0500)]
misc: Clean up and complete the gem5<->SystemC-TLM bridge [1/10]
The current TLM bridge only provides a Slave Port that allows the gem5
world to send request to the SystemC world. This patch series refractors
and cleans up the existing code, and adds a Master Port that allows the
SystemC world to send requests to the gem5 world.
This patch:
* Restructure the existing sources in preparation of the addition of the
* new
Master Port.
* Refractor names to allow for distinction of the slave and master port.
* Replace the Makefile by a SConstruct.
Testing Done: The examples provided in util/tlm (now
util/tlm/examples/slave_port) still compile and run error free.
Reviewed at http://reviews.gem5.org/r/3527/
Signed-off-by: Jason Lowe-Power <jason@lowepower.com>
Christian Menard [Fri, 10 Feb 2017 00:14:58 +0000 (19:14 -0500)]
misc: add a MasterId to the ExternalPort
The Request constructor requires a MasterID. However, an external
transactor has no chance of getting a MasterID as it does not have a
pointer to the System. This patch adds a MasterID to ExternalMaster to
allow external modules to easily genrerate new Requests.
Signed-off-by: Jason Lowe-Power <jason@lowepower.com>
Christian Menard [Fri, 10 Feb 2017 00:11:29 +0000 (19:11 -0500)]
misc: fix includes in util/systemc
This fixes compilation errors with clang on OS X.
Reviewed at http://reviews.gem5.org/r/3807/
Signed-off-by: Jason Lowe-Power <jason@lowepower.com>
Christian Menard [Fri, 10 Feb 2017 00:11:23 +0000 (19:11 -0500)]
misc: Fix order of object construction in the CxxConfigManager
The CxxConfigManager schould create objects by traversing the object tree
starting from the root object. However, currently objects are created in
aplphabetical order, which only works if the root object alphabetically
comes before any system object (e.g. 'root' < 'system'. Otherwise (e.g.
'a_system' < 'root'), object construction may fail. The reason for this
behaviour is, that the call to findObject() in the sorting code also
constructs the object if it is not yet existent. Then findTraversalOrder()
calls findObject("root") and subseqeuently calls findObject() on all the
children, and so on. However, the call to findTraversalOrder() is
redundant, since all objects are already created in alphabetical order.
This patch simply removes the alphabetical ordering, leading to the objects
being created starting from 'root'.
Reviewed at http://reviews.gem5.org/r/3778/
Signed-off-by: Jason Lowe-Power <jason@lowepower.com>
Christian Menard [Fri, 10 Feb 2017 00:10:25 +0000 (19:10 -0500)]
misc: Implement the Base SystemC Module as an sc_channel.
Implementing the Module as an sc_channel allows derived classes to provide
SystemC interfaces. Other SystemC modules can connect to these interfaces.
This meachanism can be used to control gem5 and acces gem5 components from
within arbitrary SystemC moduels. Since sc_channel is derived from
sc_module, this patch does not break compatibility with existing code.
Signed-off-by: Jason Lowe-Power <jason@lowepower.com>
Bjoern A. Zeeb [Fri, 10 Feb 2017 00:03:58 +0000 (19:03 -0500)]
sim: fix build breakage in process.cc after brandon@11801
Seeing build breakage after brandon@11801:
[ CXX] X86/sim/process.cc -> .o build/X86/sim/process.cc:137:64:
error: field '_pid' is uninitialized when used here
[-Werror,-Wuninitialized] static_cast<PageTableBase *>(new
ArchPageTable(name(), _pid, system)) : ^ build/X86/sim/process.cc:138:64:
error: field '_pid' is uninitialized when used here
[-Werror,-Wuninitialized] static_cast<PageTableBase *>(new
FuncPageTable(name(), _pid))), ^ 2 errors generated.
Testing Done: Compiles now on FreeBSD 10 with clang.
Reviewed at http://reviews.gem5.org/r/3804/
Signed-off-by: Jason Lowe-Power <jason@lowepower.com>
Bjoern A. Zeeb [Fri, 10 Feb 2017 00:03:55 +0000 (19:03 -0500)]
sim: Patch to fix the statfs build
See developers mailing list. Trying to unbreak statfs.
Testing Done:
Builds on FreeBSD now.
Reviewed at http://reviews.gem5.org/r/3803/
Signed-off-by: Jason Lowe-Power <jason@lowepower.com>
Bjoern A. Zeeb [Fri, 10 Feb 2017 00:00:00 +0000 (19:00 -0500)]
scons: make build better on FreeBSD
Various changes we found needed to build gem5 successfully on
FreeBSD.
Reviewed at http://reviews.gem5.org/r/3378/
Signed-off-by: Jason Lowe-Power <jason@lowepower.com>
Bjoern A. Zeeb [Thu, 9 Feb 2017 23:59:55 +0000 (18:59 -0500)]
dev: net/i8254xGBe add two more wakeup registers to ignore
There are drivers writing to WUFC uncondtionally of anything. In order to
not panic gem5 in these cases, ignore writes to WUFC and WUS as we do for
WUC. Similarly return 0 (default reset value) on reads.
Testing Done: Booted in FS with such a driver revision which would
previously panic and now boots fine.
Reviewed at http://reviews.gem5.org/r/3791/
Signed-off-by: Jason Lowe-Power <jason@lowepower.com>
Bjoern A. Zeeb [Thu, 9 Feb 2017 23:54:28 +0000 (18:54 -0500)]
arm: AArch64 report cache size correctly when reading CTR_EL0
Trying to read MISCREG_CTR_EL0 on AArch64 returned 0 as is was not
implmemented. With that an operating system relying on the cache line
sizes reported in order to manage the caches would (a) panic given the
returned value 0 is not valid (high bit is RES1) or (b) worst case would
assume a cache line size of 4 doing a tremendous amount of extra
instruction work (including fetching). Return the same values as for ARMv7
as the fields seem to be the same, or RES0/1 seem to be reported
accordingly for AArch64
In collaboration with: Andrew Turner
Testing Done: Checked on FreeBSD boots with extra printfs; also observed a
reduction of a factor of about 10 in instruction fetches for a simple
micro-test.
Reviewed at http://reviews.gem5.org/r/3667/
Signed-off-by: Jason Lowe-Power <jason@lowepower.com>
Andreas Sandberg [Tue, 7 Feb 2017 15:28:33 +0000 (15:28 +0000)]
style: Force Python.h to be included before main header
Python's header files set various compiler macros (e.g.,
_XOPEN_SOURCE) unconditionally. This triggers preprocessor warnings
that end up being treated as errors. The Python integration manual [1]
strongly recommends that Python.h is included before any system
header. The style guide used to mandate that Python.h is included
first in any file that needs it. This requirement was changed to
always include a source file's main header first, which ended up
triggering these errors.
This change updates the style checker to always include Python.h
before the main header file.
[1] https://docs.python.org/2/extending/extending.html
Change-Id: Id6a4f7fc64a336a8fd26691a0ca682abeb1d1579
Signed-off-by: Andreas Sandberg <andreas.sandberg@arm.com>
Reviewed-by: Nikos Nikoleris <nikos.nikoleris@arm.com>
Reviewed-by: Jason Lowe-Power <jason@lowepower.com>
Reviewed-by: Pierre-Yves Péneau <pierre-yves.peneau@lirmm.fr>
Nikos Nikoleris [Fri, 27 Jan 2017 21:07:20 +0000 (15:07 -0600)]
proto: Fix warnings for protoc v3
protoc v3 introduces a new syntax for proto files and warns when the
syntax is not explicitly stated.
protoc relies on the fact that undefined preprocessor symbols are
explanded to 0 but since we use -Wundef they end up generating
warnings.
Change-Id: If07abeb54e932469c8f2c4d38634a97fdae40f77
Reviewed-by: Andreas Hansson <andreas.hansson@arm.com>
Reviewed-by: Andreas Sandberg <andreas.sandberg@arm.com>
Signed-off-by: Jason Lowe-Power <jason@lowepower.com>
Alec Roelke [Fri, 27 Jan 2017 21:05:01 +0000 (15:05 -0600)]
riscv: Fix crash when syscall argument reg index is too high
By default, doSyscall gets the values of six registers to be used for
system call arguments. RISC-V, by convention, only has four. Because
RISC-V's implementation of these indices is as arrays of integers rather
than as base indices plus offsets, trying to get the fifth argument
register's value will cause a crash. This patch fixes that by returning 0
for any index higher than 3.
Signed-off-by: Jason Lowe-Power <jason@lowepower.com>
Paul Rosenfeld [Fri, 27 Jan 2017 21:03:17 +0000 (15:03 -0600)]
misc: Add support for switching multiple cores in SystemC
This patch adds a '-n' flag to the gem5 SystemC driver which allows
multiple CPUs to be switched out to a new CPU. Primarily this involves
appending CPU numbers to the objects searched for in the config
manager if there are multiple CPUs in the system.
Note that an equivalent change should be made to the util/cxx_config driver,
but I wanted to get input on this first before making the same change over
there
Signed-off-by: Jason Lowe-Power <jason@lowepower.com>
Rahul Thakur [Fri, 27 Jan 2017 20:58:16 +0000 (14:58 -0600)]
mem: Refactor CommMonitor stats, add basic atomic mode stats
Signed-off-by: Jason Lowe-Power <jason@lowepower.com>
Rahul Thakur [Fri, 27 Jan 2017 20:58:15 +0000 (14:58 -0600)]
mem: Add memory footprint probe
Signed-off-by: Jason Lowe-Power <jason@lowepower.com>
Andreas Sandberg [Fri, 27 Jan 2017 12:40:01 +0000 (12:40 +0000)]
python: Move native wrappers to the _m5 namespace
Swig wrappers for native objects currently share the _m5.internal name
space with Python code. This is undesirable if we ever want to switch
from Swig to some other framework for native binding (e.g., PyBind11
or Boost::Python). This changeset moves all of such wrappers to the
_m5 namespace, which is now reserved for native code.
Change-Id: I2d2bc12dbc05b57b7c5a75f072e08124413d77f3
Signed-off-by: Andreas Sandberg <andreas.sandberg@arm.com>
Reviewed-by: Curtis Dunham <curtis.dunham@arm.com>
Reviewed-by: Jason Lowe-Power <jason@lowepower.com>
Brandon Potter [Wed, 9 Nov 2016 20:27:40 +0000 (14:27 -0600)]
syscall_emul: [patch 4/22] remove redundant M5_pid field from process
Brandon Potter [Wed, 9 Nov 2016 20:27:40 +0000 (14:27 -0600)]
style: [patch 3/22] reduce include dependencies in some headers
Used cppclean to help identify useless includes and removed them. This
involved erroneously included headers, but also cases where forward
declarations could have been used rather than a full include.