util: Updated Dockfiles with the libelf-dev dep

This is required if we eventually remove `ext/libelf` (
https://gem5.atlassian.net/browse/GEM5-752), otherwise our tests will
fail.

The corresponding Docker images have been built and uploaded to:
https://gcr.io/gem5-test/

Change-Id: I1bd069dfb968b56eac4c4da33929b5ff895eaa6f
Reviewed-on: https://gem5-review.googlesource.com/c/public/gem5/+/33596
Reviewed-by: Gabe Black <gabeblack@google.com>
Reviewed-by: Jason Lowe-Power <power.jg@gmail.com>
Maintainer: Jason Lowe-Power <power.jg@gmail.com>
Tested-by: kokoro <noreply+kokoro@google.com>

util: Added GCN-GPU to cloudbuild_create_images

This adds the GCN-GPU Docker image to this cloudbuild yaml file. We
use this file to create our Docker images:

```
gcloud builds submit --config \
util/cloudbuild/cloudbuild_create_images.yaml
```

The GCN-GPU docker image can be obtained at:
https://gcr.io/gem5-test/gcn-gpu

Change-Id: I7564db78a9f00507f5acc6cf6098de35f98b6fb1
Reviewed-on: https://gem5-review.googlesource.com/c/public/gem5/+/33595
Reviewed-by: Matt Sinclair <mattdsinclair@gmail.com>
Reviewed-by: Jason Lowe-Power <power.jg@gmail.com>
Maintainer: Jason Lowe-Power <power.jg@gmail.com>
Tested-by: kokoro <noreply+kokoro@google.com>

configs: Update starter_fs.py for latest Arm FS binaries.

Updated the default kernel and root device names to match the latest
Arm full-system binaries available for download on the gem5 website.

Also added a command line option to allow the root device to be
specified as an optional command line argument.

Change-Id: I27f90ffaf0f4b35c5dcc4c22ac2fbd34f8a040a4
Reviewed-by: Giacomo Travaglini <giacomo.travaglini@arm.com>
Reviewed-by: Andreas Sandberg <andreas.sandberg@arm.com>
Reviewed-on: https://gem5-review.googlesource.com/c/public/gem5/+/30814
Maintainer: Andreas Sandberg <andreas.sandberg@arm.com>
Tested-by: kokoro <noreply+kokoro@google.com>

arch-arm: Fix coding style in addressTranslation methods

armFault -> arm_fault

Change-Id: I6263b105f8757b34dd15a06b16abe7289073614d
Signed-off-by: Giacomo Travaglini <giacomo.travaglini@arm.com>
Reviewed-on: https://gem5-review.googlesource.com/c/public/gem5/+/33434
Reviewed-by: Nikos Nikoleris <nikos.nikoleris@arm.com>
Tested-by: kokoro <noreply+kokoro@google.com>

arch-arm: Check if PAC is implemented before executing insts

If Armv8.3-PAuth (PAC) extension is not supported, most instrucions
will trigger an Undefined Instruction fault; except for a group of
them living in the HINT space; those should be treated as NOP.

Change-Id: Idec920ed15e0310ec9132a3cb3701cdb7e7cf9d1
Signed-off-by: Giacomo Travaglini <giacomo.travaglini@arm.com>
Reviewed-on: https://gem5-review.googlesource.com/c/public/gem5/+/33455
Reviewed-by: Andreas Sandberg <andreas.sandberg@arm.com>
Maintainer: Andreas Sandberg <andreas.sandberg@arm.com>
Tested-by: kokoro <noreply+kokoro@google.com>

arch-arm: Introduce HavePACExt helper

This will check for presence of pointer authentication extension.
According to the reference manual, Pointer authentication is
implemented if the value of at least one of

ID_AA64ISAR1_EL1.{APA, API, GPA, GPI}

is not 0b0000.

Change-Id: I4e98e65758e8edc953794e5b618d2c6c3f6000ae
Signed-off-by: Giacomo Travaglini <giacomo.travaglini@arm.com>
Reviewed-on: https://gem5-review.googlesource.com/c/public/gem5/+/33454
Reviewed-by: Andreas Sandberg <andreas.sandberg@arm.com>
Maintainer: Andreas Sandberg <andreas.sandberg@arm.com>
Tested-by: kokoro <noreply+kokoro@google.com>

python: Add support for introspecting scalar stats

This change adds a wrapper for the ScalarInfo stat type to enable
introspection of scalar stats from Python. Due to the slightly
confusing use of proxy objects in the stat system, PyBind11 fails to
automatically cast to the right wrapper type. This is worked around in
the by explicitly casting to the relevant type's Python wrapper.

To make the interface more Python-friendly, this change also changes
the semantics of resolveStat to raise an exception if the stat can't
be found.

Change-Id: If1fc6fe238fc9d69d4e22369a4988a06407d2f7c
Signed-off-by: Andreas Sandberg <andreas.sandberg@arm.com>
Reviewed-on: https://gem5-review.googlesource.com/c/public/gem5/+/33176
Reviewed-by: Jason Lowe-Power <power.jg@gmail.com>
Maintainer: Jason Lowe-Power <power.jg@gmail.com>
Tested-by: kokoro <noreply+kokoro@google.com>

tests: Use a docker image to build gem5.

This will give us control over what tools and packages are in the image,
instead of relying on what is provided on the kokoro build machines.

Change-Id: I9a9cdedfca4d2e9f31b3e918e01bc660e4d23f64
Reviewed-on: https://gem5-review.googlesource.com/c/public/gem5/+/33647
Maintainer: Gabe Black <gabeblack@google.com>
Reviewed-by: Jason Lowe-Power <power.jg@gmail.com>
Tested-by: kokoro <noreply+kokoro@google.com>

cpu: Factor the page size out of the decode cache.

There isn't anything special about using the page size, and it creates
an artificial dependence on the ISA. Instead of being based on pages,
the cache is now based on "chunks" who's size is a template parameter.
It defaults to 4K which is a common page size, but it can be tuned
arbitrarily if necessary.

Some unnecessary includes have been trimmed out as well.

Change-Id: I9fe59a5668d702433a800884fbfbdce20e0ade97
Reviewed-on: https://gem5-review.googlesource.com/c/public/gem5/+/33204
Reviewed-by: Jason Lowe-Power <power.jg@gmail.com>
Reviewed-by: Daniel Carvalho <odanrc@yahoo.com.br>
Maintainer: Gabe Black <gabeblack@google.com>
Tested-by: kokoro <noreply+kokoro@google.com>

misc: Clean up usage of arch/isa_traits.hh.

isa_traits.hh used to have much more in it, but now it only has
PageShift, PageBytes, and (for now) the guest endianness. These values
should only be retrieved from the System class generally speaking, so
only the system class should include arch/isa_traits.hh.

Some gpu compute related files need PageBytes or PageShift. Even though
those files don't advertise their ISA dependence, they are tied to x86.
In those files, they can include arch/x86/isa_traits.hh.

The only other file which legitimately needs arch/isa_traits.hh is the
decoder cache since it uses PageBytes to size an array.

Change-Id: I12686368715623e3140a68a7027c136bd52567b1
Reviewed-on: https://gem5-review.googlesource.com/c/public/gem5/+/33203
Reviewed-by: Gabe Black <gabeblack@google.com>
Reviewed-by: Daniel Carvalho <odanrc@yahoo.com.br>
Maintainer: Gabe Black <gabeblack@google.com>
Tested-by: kokoro <noreply+kokoro@google.com>

sparc: Minor cleanup in isa_traits.hh.

Remove unnecessary includes, and an unnecessary/unimplemented function
prototype.

Change-Id: I2230c1ec62734d918f0f6af6f4c1e1a64f25f812
Reviewed-on: https://gem5-review.googlesource.com/c/public/gem5/+/33201
Reviewed-by: Gabe Black <gabeblack@google.com>
Maintainer: Gabe Black <gabeblack@google.com>
Tested-by: kokoro <noreply+kokoro@google.com>

arch-riscv: Fix disassembling of jalr

The 'jalr' instruction of 'format Jump' should have an immediate as
offset, and the Rd register could not be always omitted. This patch
fixes the problem.

Example output:
  jalr ra, -168(ra)
  jalr zero, 0(ra)
  jalr ra, 0(a5)

Note that this does not apply to the other two instructions of the
same format: 'c.jr' and 'c.jalr'.

Change-Id: Ia656c2e8bfafd243bfec221ac291190a84684929
Signed-off-by: Ian Jiang <ianjiang.ict@gmail.com>
Reviewed-on: https://gem5-review.googlesource.com/c/public/gem5/+/33155
Reviewed-by: Jason Lowe-Power <power.jg@gmail.com>
Maintainer: Jason Lowe-Power <power.jg@gmail.com>
Tested-by: kokoro <noreply+kokoro@google.com>

riscv: Remove unnecessary includes from arch/riscv/isa_traits.hh.

Change-Id: Iff3e840c5b67fa23ebead337abf323e7add2e6db
Reviewed-on: https://gem5-review.googlesource.com/c/public/gem5/+/33200
Reviewed-by: Jason Lowe-Power <power.jg@gmail.com>
Maintainer: Jason Lowe-Power <power.jg@gmail.com>
Tested-by: kokoro <noreply+kokoro@google.com>

power: Tidy up isa_traits.hh and delete the VAddr class.

The VAddr class wasn't used and was just a copy (with style fixes) of
the Alpha version.

Delete unused constants in isa_traits.hh, and remove unnecessary
includes. Replace MachineBytes with sizeof(uint32_t) in
arch/power/process.cc.

Change-Id: Ia4862448c43b2dd07078b1ebbbbfda4636343730
Reviewed-on: https://gem5-review.googlesource.com/c/public/gem5/+/33199
Reviewed-by: Jason Lowe-Power <power.jg@gmail.com>
Maintainer: Jason Lowe-Power <power.jg@gmail.com>
Tested-by: kokoro <noreply+kokoro@google.com>

arch-gcn3: Update LmReqsInPipe in atomic flats when execMask=0

In flat instructions, wrLmReqsInPipe/rdLmReqsInPipe are decremented
in the calcAddr() function. However, the calcAddr() function is only
called when execMask != 0.

This patch adds in statements to decrement wrLmReqsInPipe and
rdLmReqsInPipe in all implemented atomic flats when execMask is 0.

This fixes a scenario where vector local memory and flat instructions
are unable to execute due to LocalMemPipeline::isLMReqFIFOWrRdy
always returning false in ScheduleStage::dispatchReady after too many
atomic flats execute with execMask = 0

Change-Id: I081cfd3faf74bbfcf0728445e7160fa2a76a6a7e
Reviewed-on: https://gem5-review.googlesource.com/c/public/gem5/+/32614
Reviewed-by: Matt Sinclair <mattdsinclair@gmail.com>
Reviewed-by: Alexandru Duțu <alexandru.dutu@amd.com>
Maintainer: Anthony Gutierrez <anthony.gutierrez@amd.com>
Tested-by: kokoro <noreply+kokoro@google.com>

util: Explicitly decode/encode in utf-8.

The default encoding for python 2 is ascii which can't handle some
characters in, for instance, people's names which have accented letters.
This change explicitly selects the utf-8 encoding which pacifies python
and is mostly equivalent except in these rare cases.

In python 3, the default encoding is utf-8 to begin with, and it's no
longer possible to change it. In this case, explicitly selecting the
encoding is redundant but harmless.

When we support only python 3, then this change can be reverted.

Thanks to Lakin Smith for proposing a related solution and pointing out
some information that led to this one.

Change-Id: I99bd59063c77edd712954ffe90d7de320ade49ea
Reviewed-on: https://gem5-review.googlesource.com/c/public/gem5/+/33575
Maintainer: Gabe Black <gabeblack@google.com>
Tested-by: kokoro <noreply+kokoro@google.com>
Reviewed-by: Lakin Smith <lakindsmith@gmail.com>
Reviewed-by: Jason Lowe-Power <power.jg@gmail.com>

gpu-compute: Create CU's ports in the standard way

The CU would initialize its ports in getMasterPort(), which
is not desirable as getMasterPort() may be called several
times for the same port. This can lead to a fatal if the CU
expects to only create a single port of a given type, and may
lead to other issues where stat names are duplicated.

This change instantiates and initializes the CU's ports in the
CU constructor using the CU params.

The index field is also removed from the CU's ports because the
base class already has an ID field, which will be set to the
default value in the base class's constructor for scalar ports.

It doesn't make sense for scalar port's to take an index because
they are scalar, so we let the base class initialize the ID to
the invalid port ID.

Change-Id: Id18386f5f53800a6447d968380676d8fd9bac9df
Reviewed-on: https://gem5-review.googlesource.com/c/public/gem5/+/32836
Reviewed-by: Anthony Gutierrez <anthony.gutierrez@amd.com>
Maintainer: Anthony Gutierrez <anthony.gutierrez@amd.com>
Tested-by: kokoro <noreply+kokoro@google.com>

systemc: Send response to TLM side if a packet does not need response

A completed TLM transaction includes request and response parts.
Currently, if a gem5 packet does not need a reponse, the bridge would not
send BEGIN_RESP to its upstream. It causes stuck on TLM side.

To fix this problem, the bridge should send BEGIN_RESP by itself in this
case.

Change-Id: I318dec21bc3f291693715c0d70bc624addf05076
Reviewed-on: https://gem5-review.googlesource.com/c/public/gem5/+/32735
Reviewed-by: Gabe Black <gabeblack@google.com>
Tested-by: kokoro <noreply+kokoro@google.com>
Maintainer: Gabe Black <gabeblack@google.com>

sim: Fix up the selectFunc syscall to work with g++ 10.2.

This is no longer willing to implicitly cast between the locally defined
Linux::fd_set type and the system fd_set type. That's pretty reasonable
since those types are really independent of one another, and we
shouldn't be using them interchangeably in the first place. That's a
pre-existing condition though, and I just want to get the existing code
to compile for now.

Change-Id: I41d5f3695dfe5f0e406d074d31d13c6e3282df64
Reviewed-on: https://gem5-review.googlesource.com/c/public/gem5/+/33415
Reviewed-by: Ciro Santilli <ciro.santilli@arm.com>
Reviewed-by: Jason Lowe-Power <power.jg@gmail.com>
Maintainer: Jason Lowe-Power <power.jg@gmail.com>
Tested-by: kokoro <noreply+kokoro@google.com>

systemc,sim: Update port terminology

Change-Id: Iaeafe94245e383fcb1146c99c893fd56fe9bb636
Reviewed-on: https://gem5-review.googlesource.com/c/public/gem5/+/32316
Reviewed-by: Gabe Black <gabeblack@google.com>
Maintainer: Gabe Black <gabeblack@google.com>
Tested-by: kokoro <noreply+kokoro@google.com>

dev: Update port terminology

Change-Id: I48bd6718471f034f7c3226279efe7ada0d9c81e9
Reviewed-on: https://gem5-review.googlesource.com/c/public/gem5/+/32315
Reviewed-by: Giacomo Travaglini <giacomo.travaglini@arm.com>
Reviewed-by: Gabe Black <gabeblack@google.com>
Maintainer: Giacomo Travaglini <giacomo.travaglini@arm.com>
Maintainer: Gabe Black <gabeblack@google.com>
Tested-by: kokoro <noreply+kokoro@google.com>

mem: Update port terminology

Change-Id: Ib4fc8cad7139d4971e74930295a69e576f6da3cf
Reviewed-on: https://gem5-review.googlesource.com/c/public/gem5/+/32314
Reviewed-by: Jason Lowe-Power <power.jg@gmail.com>
Maintainer: Jason Lowe-Power <power.jg@gmail.com>
Tested-by: kokoro <noreply+kokoro@google.com>

gpu-compute: update port terminology

Change-Id: I3121c4afb1e137aebe09c1d694e9484844d02b9b
Reviewed-on: https://gem5-review.googlesource.com/c/public/gem5/+/32313
Reviewed-by: Jason Lowe-Power <power.jg@gmail.com>
Reviewed-by: Matt Sinclair <mattdsinclair@gmail.com>
Reviewed-by: Matt Poremba <chesp3@gmail.com>
Maintainer: Jason Lowe-Power <power.jg@gmail.com>
Tested-by: kokoro <noreply+kokoro@google.com>

cpu: update port terminology

Change-Id: I891e7a74683c1775c75a62454fcfdecb7511b7e9
Reviewed-on: https://gem5-review.googlesource.com/c/public/gem5/+/32312
Maintainer: Jason Lowe-Power <power.jg@gmail.com>
Tested-by: kokoro <noreply+kokoro@google.com>
Reviewed-by: Bobby R. Bruce <bbruce@ucdavis.edu>

arch: update port terminology

Change-Id: Ifcf90534d8e5ff5fc68538ec87dc541517ea404d
Reviewed-on: https://gem5-review.googlesource.com/c/public/gem5/+/32311
Reviewed-by: Bobby R. Bruce <bbruce@ucdavis.edu>
Reviewed-by: Giacomo Travaglini <giacomo.travaglini@arm.com>
Reviewed-by: Gabe Black <gabeblack@google.com>
Maintainer: Gabe Black <gabeblack@google.com>
Tested-by: kokoro <noreply+kokoro@google.com>

learning-gem5: update port terminology

Change-Id: I0ca705cf93396b5c34a0ac4dce30411c5c866733
Reviewed-on: https://gem5-review.googlesource.com/c/public/gem5/+/32310
Reviewed-by: Jason Lowe-Power <power.jg@gmail.com>
Maintainer: Jason Lowe-Power <power.jg@gmail.com>
Tested-by: kokoro <noreply+kokoro@google.com>

misc: Updated port classes & refs to remove slaveBind()/UnBind()

Change-Id: I9106397b8816d8148dd916510bbcf65ed499d303
Reviewed-on: https://gem5-review.googlesource.com/c/public/gem5/+/32309
Reviewed-by: Bobby R. Bruce <bbruce@ucdavis.edu>
Reviewed-by: Gabe Black <gabeblack@google.com>
Maintainer: Gabe Black <gabeblack@google.com>
Tested-by: kokoro <noreply+kokoro@google.com>

mem: Deprecate SlavePort and MasterPort classes

After this change, if you use these classes or inherit from these
classes, the compiler will now give you a warning that these names are
deprecated. Instead, you should use ResponsePort and RequestPort,
respectively.

This patch simply deprecates these names. The following patches will
convert all of the code in gem5 to use these new names. The first step
is converting the class names and the uses of these classes, then we
will update the variable names to be more precise as well.

Change-Id: I5e6e90b2916df4dbfccdaabe97423f377a1f6e3f
Reviewed-on: https://gem5-review.googlesource.com/c/public/gem5/+/32308
Reviewed-by: Jason Lowe-Power <power.jg@gmail.com>
Maintainer: Jason Lowe-Power <power.jg@gmail.com>
Tested-by: kokoro <noreply+kokoro@google.com>

python: Add DeprecatedParam type

There are times when we need to change the name of parameter, but this
breaks the external-facing python API used in configuration files. Using
this "type" for a parameter will warn users that they are using the old
name, but allow for backwards compatibility.

Declaring a SimObject parameter of type `DeprecatedParam` allows the
python configuration files to use the old name transparently. This
leverages some of the SimObject magic to remember the names of
deprecated parameters and the DeprecatedParam object stores the
"translation" from old name to new name.

This has been tested with Ports, "normal" parameters, and SimObject
parameters. It has not been tested with checkpointing as there are no
checkpointing tests in gem5 right now. The testing was manually adding
some deprecated params and checking that config scripts still run
correctly that use the old, deprecated, variables.

Change-Id: I0465a748c08a24278d6b1a9d9ee1bcd67baa5b13
Signed-off-by: Jason Lowe-Power <jason@lowepower.com>
Reviewed-on: https://gem5-review.googlesource.com/c/public/gem5/+/31954
Reviewed-by: Jason Lowe-Power <power.jg@gmail.com>
Maintainer: Jason Lowe-Power <power.jg@gmail.com>
Tested-by: kokoro <noreply+kokoro@google.com>

arch-arm: Rewrite addressTranslation to use BitUnions

Change-Id: I48877d026213a0dec8b8f96deef59bdbc9a40564
Signed-off-by: Giacomo Travaglini <giacomo.travaglini@arm.com>
Reviewed-on: https://gem5-review.googlesource.com/c/public/gem5/+/33356
Reviewed-by: Nikos Nikoleris <nikos.nikoleris@arm.com>
Tested-by: kokoro <noreply+kokoro@google.com>

arch-arm: Remove deadcode from AArch64 address translation

There's no need to check for CPSR.WIDTH: if the 64 bit version
of the AT instruction/register is used, it means we are already
in AArch64 execution mode

Change-Id: I1263dcfd04e791eb390199546c177a926c71c6d5
Signed-off-by: Giacomo Travaglini <giacomo.travaglini@arm.com>
Reviewed-on: https://gem5-review.googlesource.com/c/public/gem5/+/33355
Reviewed-by: Nikos Nikoleris <nikos.nikoleris@arm.com>
Tested-by: kokoro <noreply+kokoro@google.com>

arch-arm: Refactor Address Translation (AT) code

* Removed the nested switch
* Replace warn with warn_once as it's polluting the stdout

Change-Id: Iafbf43b68b7c3382cfcd1884305f8393bc63f981
Signed-off-by: Giacomo Travaglini <giacomo.travaglini@arm.com>
Reviewed-on: https://gem5-review.googlesource.com/c/public/gem5/+/33354
Reviewed-by: Nikos Nikoleris <nikos.nikoleris@arm.com>
Tested-by: kokoro <noreply+kokoro@google.com>

tests: ignore 32-bit arm dual linux boot tests

As mentioned on the JIRA issue, uncacheable requests done after
cacheable requests had been done to the address make the cache writeback
and write trash data to memory.

We believe that the kernel must be doing earlier invalidation by set and
way earlier on to prevent this, but that is not implemented in gem5 yet.

The problem can be worked around by booting in atomic without caches and
checkpointing after init, because uncacheable accesses are only done on
early stages of CPU bringup, which is the more common use case anyways.

The aarch64 Linux kernel developers have stated that set and way
invalidates are not going to be used in aarch64, which further reduces the
importance of implementing this immediatly

JIRA: https://gem5.atlassian.net/browse/GEM5-640
Change-Id: Ieba31e707dcc09693d7a87ed9d51c3d1ffa3abe0
Reviewed-on: https://gem5-review.googlesource.com/c/public/gem5/+/33015
Reviewed-by: Jason Lowe-Power <power.jg@gmail.com>
Reviewed-by: Giacomo Travaglini <giacomo.travaglini@arm.com>
Maintainer: Jason Lowe-Power <power.jg@gmail.com>
Maintainer: Giacomo Travaglini <giacomo.travaglini@arm.com>
Tested-by: kokoro <noreply+kokoro@google.com>

python: Use six's with_metaclass instead of it's add_metaclass.

The decorator creates two versions of a class, adding it to the Params
dict multiple times which generates an annoying warning. Alternatively,
the with_metaclass mechanism sets up an alternative base class which
does not create the extra class and doesn't generate the warning.

It may be the case that this generates extra classes which just don't
lead to a warning? Or in other words, would we then have Params types
with weird, internal names generated by six? Hopefully not, but that may
be preferable to the annoying warnings, especially when running tests
which run gem5 many times.

Change-Id: I9395cde3fc95126c0a0c4db67fc5b0c6bf2dd9ed
Reviewed-on: https://gem5-review.googlesource.com/c/public/gem5/+/33276
Reviewed-by: Andreas Sandberg <andreas.sandberg@arm.com>
Maintainer: Andreas Sandberg <andreas.sandberg@arm.com>
Tested-by: kokoro <noreply+kokoro@google.com>

arm: Clear out isa_traits.hh.

Remove unused constants, move the interrupt related constants to
arch/arm/interrupts.hh, move a paging related constant to
arch/arm/pagetable.hh, and get rid of unnecessary includes.

Change-Id: Ide219f7a8515e010c1dd029db2ef22d8f614d8a1
Reviewed-on: https://gem5-review.googlesource.com/c/public/gem5/+/33198
Reviewed-by: Andreas Sandberg <andreas.sandberg@arm.com>
Maintainer: Andreas Sandberg <andreas.sandberg@arm.com>
Tested-by: kokoro <noreply+kokoro@google.com>

arch: Get rid of (some) unused VAddr types.

X86 actually defines and uses a VAddr bitunion, but the ARM, MIPS and
SPARC versions are just stubs and aren't used anywhere.

Change-Id: Iea8d0c8ab04ac1d95f49458f0fc41f291751da1a
Reviewed-on: https://gem5-review.googlesource.com/c/public/gem5/+/33202
Maintainer: Gabe Black <gabeblack@google.com>
Tested-by: kokoro <noreply+kokoro@google.com>
Reviewed-by: Nikos Nikoleris <nikos.nikoleris@arm.com>

util: Fix interworking for the thumb version of the m5 util.

Make sure the m5 op call sight is marked as thumb, and also use an
interworking branch to return from it.

Change-Id: I4f6ec6a0e9e7ff76fc8f256fec9ec410a9959189
Reviewed-on: https://gem5-review.googlesource.com/c/public/gem5/+/27748
Maintainer: Gabe Black <gabeblack@google.com>
Tested-by: kokoro <noreply+kokoro@google.com>
Reviewed-by: Jason Lowe-Power <power.jg@gmail.com>
Reviewed-by: Giacomo Travaglini <giacomo.travaglini@arm.com>

util: Enable neon when building arm/thumb versions of the m5 util.

Apparently the presence of a hardware FPU is no longer implied by
-march=armv7-a (or armv7 I assume), and so adding -mfpu=neon is
necessary when using hardware floating point in gcc/g++.

Change-Id: I59c5b58933fae2e4e5a747b2af128b801acc812e
Reviewed-on: https://gem5-review.googlesource.com/c/public/gem5/+/27747
Maintainer: Gabe Black <gabeblack@google.com>
Tested-by: kokoro <noreply+kokoro@google.com>
Reviewed-by: Jason Lowe-Power <power.jg@gmail.com>

util: Add a unit test for the "inst" call type in the m5 util.

This test does two things. First, it makes sure that the "inst" call
type detects that it's being requested in the command line arguments
correctly.

Second, it detects whether it's running in gem5 or not, really just
detecting an environment variable which tells it whether it is. If it
is, then it attempts to run the "sum" op which it expects to succeed and
give the right answer.

If not, it expects to get a SIGILL signal from the OS when it tries to
execute the otherwise illegal instruction. It sets up a signal handler
to catch it, and in that handler saves off information about what
happened. It then uses siglongjmp to return to sanity (before the
signal) and to examine what happened to see if the right instruction was
attempted.

It looks like, depending on the architecture, Linux will either set
si_code to ILL_ILLOPC (illegal opcode) or ILL_ILLOPN (illegal operand).
The later doesn't seem right since the entire instruction is illegal,
not just some operand, but it is what it is and we need to handle
either.

The test then calls a small function, abi_verify, which takes the
siginfo_t and does any abi specific verification. That includes
extracting fields from the instruction if the instruction trigger the
signal, or checking for architecture specific constants, etc.

Also, to centralize setting the macro which lets a call type know that
it's the default, the call types are now also responsible for setting up
their own tweaks to the environment.

Change-Id: I8710e39e20bd9c03b1375a2dccefb27bd6fe0c10
Reviewed-on: https://gem5-review.googlesource.com/c/public/gem5/+/27689
Reviewed-by: Giacomo Travaglini <giacomo.travaglini@arm.com>
Maintainer: Gabe Black <gabeblack@google.com>
Tested-by: kokoro <noreply+kokoro@google.com>

test,arch-riscv: Removed the RISCV Insttests

These tests verify RISCV instructions. This is already one by the
asmtests:
https://gem5.googlesource.com/public/gem5/+/refs/heads/develop/tests/gem5/asmtest/tests.py

The asmtests do this better.

Furthermore, the insttests have some bugs associated with them, which
would require some engineering effort fix:
https://gem5.atlassian.net/browse/GEM5-729
https://gem5.atlassian.net/browse/GEM5-748
https://gem5.atlassian.net/browse/GEM5-749

This patch removes the RISCV insttests.

Change-Id: I9ee3c88d06778823f655ef9222071beb57c6c995
Reviewed-on: https://gem5-review.googlesource.com/c/public/gem5/+/33147
Reviewed-by: Bobby R. Bruce <bbruce@ucdavis.edu>
Maintainer: Bobby R. Bruce <bbruce@ucdavis.edu>
Tested-by: kokoro <noreply+kokoro@google.com>

mem-cache: Create Compressor namespace

Creation of the Compressor namespace. It encapsulates all the cache
compressors, and other classes used by them.

The following classes have been renamed:
BaseCacheCompressor -> Base
PerfectCompressor - Perfect
RepeatedQwordsCompressor -> RepeatedQwords
ZeroCompressor -> Zero

BaseDictionaryCompressor and DictionaryCompressor were not renamed
because the there is a high probability that users may want to
create a Dictionary class that encompasses the dictionary contained
by these compressors.

To apply this patch one must force recompilation (e.g., by deleting
it) of build/<arch>/params/BaseCache.hh (and any other files that
were previously using these compressors).

Change-Id: I78cb3b6fb8e3e50a52a04268e0e08dd664d81230
Signed-off-by: Daniel R. Carvalho <odanrc@yahoo.com.br>
Reviewed-on: https://gem5-review.googlesource.com/c/public/gem5/+/33294
Reviewed-by: Nikos Nikoleris <nikos.nikoleris@arm.com>
Maintainer: Nikos Nikoleris <nikos.nikoleris@arm.com>
Tested-by: kokoro <noreply+kokoro@google.com>

mips: Remove unused or misplaced values from isa_traits.hh.

Most of these values were unused, except the interrupt levels which were
moved to the interrupt controller, the only place they were used.
Unnecessary includes were also removed.

Change-Id: I783966413d51391663a9217ed672ec1f2b4719b7
Reviewed-on: https://gem5-review.googlesource.com/c/public/gem5/+/33197
Reviewed-by: Gabe Black <gabeblack@google.com>
Maintainer: Gabe Black <gabeblack@google.com>
Tested-by: kokoro <noreply+kokoro@google.com>

arch,cpu,sim: Get rid of the microcode ROM stub code.

This code, including a switching header file, is no longer necessary
because ROM based microops are now handled by the decoder itself.

Change-Id: Ie3ea4a7371dec22993ede80e2acd1df7cd1ecf59
Reviewed-on: https://gem5-review.googlesource.com/c/public/gem5/+/32899
Reviewed-by: Andreas Sandberg <andreas.sandberg@arm.com>
Maintainer: Andreas Sandberg <andreas.sandberg@arm.com>
Tested-by: kokoro <noreply+kokoro@google.com>

cpu,arch: Delegate fetching ROM microops to the decoder.

In most cases, the microcode ROM doesn't actually do anything. The
structural existence of a microcode ROM doesn't make sense in the
general case, and in architectures that know they have one and need to
interact with it, they can cast their decoder into an arch specific type
and access the ROM that way.

Change-Id: I25b67bfe65df1fdb84eb5bc894cfcb83da1ce64b
Reviewed-on: https://gem5-review.googlesource.com/c/public/gem5/+/32898
Reviewed-by: Andreas Sandberg <andreas.sandberg@arm.com>
Maintainer: Andreas Sandberg <andreas.sandberg@arm.com>
Tested-by: kokoro <noreply+kokoro@google.com>

x86: Use default initializers to simplify the decoder constructor.

Change-Id: I76f1fe9a58a26f26c204cb0b9bab050a22d289c9
Reviewed-on: https://gem5-review.googlesource.com/c/public/gem5/+/32895
Reviewed-by: Nikos Nikoleris <nikos.nikoleris@arm.com>
Maintainer: Gabe Black <gabeblack@google.com>
Tested-by: kokoro <noreply+kokoro@google.com>

x86: Remove unnecessary includes from isa_traits.hh.

These includes are not used in this header file, and if they're needed
by other source it should include them directly.

Change-Id: I7d17d7c7fcc1020d85f1257059d2c2057b0c461d
Reviewed-on: https://gem5-review.googlesource.com/c/public/gem5/+/33196
Reviewed-by: Andreas Sandberg <andreas.sandberg@arm.com>
Maintainer: Gabe Black <gabeblack@google.com>
Tested-by: kokoro <noreply+kokoro@google.com>

sim: Style fixes in the base Fault classes.

Change-Id: Iff8588aba929b3909ca1b5ec0e494acb8f838543
Reviewed-on: https://gem5-review.googlesource.com/c/public/gem5/+/33280
Maintainer: Gabe Black <gabeblack@google.com>
Tested-by: kokoro <noreply+kokoro@google.com>
Reviewed-by: Bobby R. Bruce <bbruce@ucdavis.edu>

x86: Style fixes in x86's fault implementations.

Change-Id: I320877a7e753eae5ffba2421e6dfe23b52352664
Reviewed-on: https://gem5-review.googlesource.com/c/public/gem5/+/33279
Maintainer: Gabe Black <gabeblack@google.com>
Tested-by: kokoro <noreply+kokoro@google.com>
Reviewed-by: Bobby R. Bruce <bbruce@ucdavis.edu>

x86: Replace "is not" with "!=" in fpop.isa.

Some variables were being compared against some constants with "is not",
which is not correct since it will compare for identity rather than
equivalence. There was a long standing build warning from this, but it
wasn't clear where the error was coming from since it was in python
interpreted from a string in the ISA description.

This change replaces "is not" in those two places with "!=".

Change-Id: I0c4d038af6e047ffd79f8171713e8e998e840e3b
Reviewed-on: https://gem5-review.googlesource.com/c/public/gem5/+/33283
Maintainer: Gabe Black <gabeblack@google.com>
Tested-by: kokoro <noreply+kokoro@google.com>
Reviewed-by: Bobby R. Bruce <bbruce@ucdavis.edu>

misc: Replace some includes of arch/isa_traits.hh.

In sim/vma.hh, the include was indirectly getting the definition of
DPRINTF. It was replaced with an include of base/trace.hh which actually
provides that definition.

In the indirect branch predictor, it was being used to get the
definition of TheISA::PCState. This should come from arch/types.hh
instead.

Change-Id: I6de08f196499c85b54edde09d654902cc766c2eb
Reviewed-on: https://gem5-review.googlesource.com/c/public/gem5/+/33195
Reviewed-by: Daniel Carvalho <odanrc@yahoo.com.br>
Reviewed-by: Andreas Sandberg <andreas.sandberg@arm.com>
Maintainer: Andreas Sandberg <andreas.sandberg@arm.com>
Tested-by: kokoro <noreply+kokoro@google.com>

util,tests: Added .txt file extension to txt files

This is a small improvement. In our Jenkins, https://jenkins.gem5.org,
we archive the `compile-test-out` directory. Opening these `*.stderr`
and `*.stdout` files through the Jenkins interface was problematic. The
`.txt` extension makes these files easier to open.

Change-Id: I4026efec2118179eaed775c7560510cd16f349a6
Reviewed-on: https://gem5-review.googlesource.com/c/public/gem5/+/32154
Reviewed-by: Ciro Santilli <ciro.santilli@arm.com>
Reviewed-by: Hoa Nguyen <hoanguyen@ucdavis.edu>
Reviewed-by: Daniel Carvalho <odanrc@yahoo.com.br>
Maintainer: Jason Lowe-Power <power.jg@gmail.com>
Tested-by: kokoro <noreply+kokoro@google.com>

util,tests: Added exit code to the compiler tests

This testing script should return a non-exit code when one of the
compilations fail.

Change-Id: Ie15bc5779372dd31d784eaffdee4b04abb9a1b11
Reviewed-on: https://gem5-review.googlesource.com/c/public/gem5/+/32097
Reviewed-by: Ciro Santilli <ciro.santilli@arm.com>
Reviewed-by: Hoa Nguyen <hoanguyen@ucdavis.edu>
Reviewed-by: Daniel Carvalho <odanrc@yahoo.com.br>
Maintainer: Bobby R. Bruce <bbruce@ucdavis.edu>
Tested-by: kokoro <noreply+kokoro@google.com>

util,tests: Removed GCC 4.8 from compilers tests

We are going to remove support of GCC 4
(https://gem5.atlassian.net/browse/GEM5-218) as part of the gem5 20.1
release.

Change-Id: Ie44b553d35f48118d24b96eba564a927fefdb985
Reviewed-on: https://gem5-review.googlesource.com/c/public/gem5/+/32096
Reviewed-by: Giacomo Travaglini <giacomo.travaglini@arm.com>
Reviewed-by: Hoa Nguyen <hoanguyen@ucdavis.edu>
Reviewed-by: Daniel Carvalho <odanrc@yahoo.com.br>
Maintainer: Bobby R. Bruce <bbruce@ucdavis.edu>
Tested-by: kokoro <noreply+kokoro@google.com>

arch-riscv, arch-x86: convert tlb to new style stats

Change-Id: Ie2754d861a658fde0acdda30cbcb91e02029e33a
Reviewed-on: https://gem5-review.googlesource.com/c/public/gem5/+/32835
Reviewed-by: Jason Lowe-Power <power.jg@gmail.com>
Maintainer: Jason Lowe-Power <power.jg@gmail.com>
Tested-by: kokoro <noreply+kokoro@google.com>

arch-mips, arch-power: removed unused stats

Change-Id: Ic44943eaefab027d6dc665e531f827202b353093
Reviewed-on: https://gem5-review.googlesource.com/c/public/gem5/+/32834
Reviewed-by: Jason Lowe-Power <power.jg@gmail.com>
Reviewed-by: Gabe Black <gabeblack@google.com>
Maintainer: Jason Lowe-Power <power.jg@gmail.com>
Tested-by: kokoro <noreply+kokoro@google.com>

arch-x86,cpu: Fix bpred by annotating branch instructions in x86

Original Creator: Adria Armejach.

Branch instructions needed to be annotated in x86 as direct/indirect and conditional/unconditional. These annotations where not present causing the branch predictor to misbehave, not using the BTB. In addition, logic to determine the real branch target at decode needed to be added as it was also missing.

Change-Id: I91e707452c1825b9bb4ae75c3f599da489ae5b9a
Reviewed-on: https://gem5-review.googlesource.com/c/public/gem5/+/29154
Reviewed-by: Alexandru Duțu <alexandru.dutu@amd.com>
Maintainer: Jason Lowe-Power <power.jg@gmail.com>
Tested-by: kokoro <noreply+kokoro@google.com>

tests: Removed m5threads tests from .testignore

This commit fixes many problems which were resulting in these tests
not executing correctly. However, the m5thread tests are still failing
with an `fatal:syscall set_tid_address (#166) unimplemented` error,
recorded here: https://gem5.atlassian.net/browse/GEM5-747.

The tests have been removed from .testignore as part of our goal of
removing all tests from the .testignore file:
https://gem5.atlassian.net/browse/GEM5-361

Change-Id: I287d1e126963114a791d7f3aa563a037a89b2cb7
Reviewed-on: https://gem5-review.googlesource.com/c/public/gem5/+/32916
Reviewed-by: Jason Lowe-Power <power.jg@gmail.com>
Maintainer: Jason Lowe-Power <power.jg@gmail.com>
Tested-by: kokoro <noreply+kokoro@google.com>

tests: Added tests/gem5/resources to .gitignore

This is simply a directory used by testlib to store downloaded
resources. It should therefore be ignored.

Change-Id: Iede2234dc512b3bc8bdcccfaef0b14d56dee0a27
Reviewed-on: https://gem5-review.googlesource.com/c/public/gem5/+/32915
Reviewed-by: Jason Lowe-Power <power.jg@gmail.com>
Maintainer: Jason Lowe-Power <power.jg@gmail.com>
Tested-by: kokoro <noreply+kokoro@google.com>

tests: Removed the hello tests from .testignore

The "hello" tests that were previously ignored are all functioning
correctly, and are therefore being re-included in the test suite. The
MIPS and SPARC tests have been tagged a "long" as we do not compile
these ISAs are part of our "quick" tests.

Change-Id: I3aa079b81b938a12da6993213d158e53bc4ae514
Reviewed-on: https://gem5-review.googlesource.com/c/public/gem5/+/32914
Reviewed-by: Jason Lowe-Power <power.jg@gmail.com>
Maintainer: Jason Lowe-Power <power.jg@gmail.com>
Tested-by: kokoro <noreply+kokoro@google.com>

misc: Delete the critical path annotation code.

This code was at least a little Alpha specific, and now that Alpha is
gone it can no longer be compiled. We could either fix it up to work
with other/all ISAs or delete it, and the consensus was to delete it. It
could potentially be revived in the future by retrieving it from version
control.

Change-Id: Ied073f2b9b166951ecba3442cd762eb19bc690b3
Reviewed-on: https://gem5-review.googlesource.com/c/public/gem5/+/32954
Reviewed-by: Steve Reinhardt <stever@gmail.com>
Maintainer: Gabe Black <gabeblack@google.com>
Tested-by: kokoro <noreply+kokoro@google.com>

mem: Use getGuestByteOrder in the indirect memory prefetcher.

Use that instead of accessing TheISA::GuestByteOrder directly.

Change-Id: I6fbeb7501aceadb95739bb482215097af18da2fa
Reviewed-on: https://gem5-review.googlesource.com/c/public/gem5/+/32926
Reviewed-by: Daniel Carvalho <odanrc@yahoo.com.br>
Maintainer: Gabe Black <gabeblack@google.com>
Tested-by: kokoro <noreply+kokoro@google.com>

arch-riscv: Add float registers in copyRegs

The origin copyRegs() does not include float registers.
This patch fixes the problem.

Change-Id: If4ad04b1eda6035486197879ff3e04ff32dd87bb
Signed-off-by: Ian Jiang <ianjiang.ict@gmail.com>
Reviewed-on: https://gem5-review.googlesource.com/c/public/gem5/+/32934
Reviewed-by: Jason Lowe-Power <power.jg@gmail.com>
Maintainer: Jason Lowe-Power <power.jg@gmail.com>
Tested-by: kokoro <noreply+kokoro@google.com>

arch: Eliminate the unused HasUnalignedMemAcc constant.

Change-Id: Iaf9346df57336216c09979fe1d931701c6b7ddf6
Reviewed-on: https://gem5-review.googlesource.com/c/public/gem5/+/32923
Reviewed-by: Andreas Sandberg <andreas.sandberg@arm.com>
Maintainer: Andreas Sandberg <andreas.sandberg@arm.com>
Tested-by: kokoro <noreply+kokoro@google.com>

arch: Eliminate an unused pair of constants from isa_traits.hh.

The one questionable use of CurThreadInfoImplemented (always false) and
CurThreadInfoReg (always -1) has been eliminated, making these constants
unnecessary.

Change-Id: Ibfe4f7be7ce5aaf9c5e896146e1b05b3ac752305
Reviewed-on: https://gem5-review.googlesource.com/c/public/gem5/+/32922
Reviewed-by: Andreas Sandberg <andreas.sandberg@arm.com>
Maintainer: Andreas Sandberg <andreas.sandberg@arm.com>
Tested-by: kokoro <noreply+kokoro@google.com>

arch: Make ThreadInfo::curThreadInfo virtual, protected.

Also remove it's Alpha centric implementation. All existing ISAs will
panic since they all define the guarding constant as false. Even if they
defined it as true, this function assumes that there is necessarily a misc
reg which can be read to find the current thread_info struct, and how
the contents of that register should be manipulated.

This code is already fairly fragile since it depends on things in the
Linux kernel having certain names and relationships with each other, but
that's a larger problem I don't want to fix right now.

Change-Id: Ic107793ebcd25ee25c4d3713c84c1d2b5209f1a3
Reviewed-on: https://gem5-review.googlesource.com/c/public/gem5/+/32921
Reviewed-by: Andreas Sandberg <andreas.sandberg@arm.com>
Maintainer: Gabe Black <gabeblack@google.com>
Tested-by: kokoro <noreply+kokoro@google.com>

x86: Replace getDoubleBits with floatToBits64.

The getDoubleBits function was used exactly once to find the bit
representation of a double floating point value, which is the same thing
the common floatToBits64 function does. Eliminate x86's one off version,
and use the common one instead.

Change-Id: Icb0cec5a55d81a6eacf1bb5a3c2b8f16c414d0d9
Reviewed-on: https://gem5-review.googlesource.com/c/public/gem5/+/32927
Reviewed-by: Andreas Sandberg <andreas.sandberg@arm.com>
Maintainer: Gabe Black <gabeblack@google.com>
Tested-by: kokoro <noreply+kokoro@google.com>

mem: Use the System object's getGuestByteOrder in AbstractMemory.

Change-Id: Ifcf3d8dcbee73555b23ec0a8c25572921fca13a6
Reviewed-on: https://gem5-review.googlesource.com/c/public/gem5/+/32925
Reviewed-by: Daniel Carvalho <odanrc@yahoo.com.br>
Maintainer: Gabe Black <gabeblack@google.com>
Tested-by: kokoro <noreply+kokoro@google.com>

arch: Remove the "inline" keyword in ThreadInfo.

Methods which are defined inline are already implicitly inline, making
that keyword redundant. It's also inconsistently used.

Change-Id: If6ec3e94d126ae52d9c2f0d3e8ca27f1ac600650
Reviewed-on: https://gem5-review.googlesource.com/c/public/gem5/+/32920
Reviewed-by: Andreas Sandberg <andreas.sandberg@arm.com>
Maintainer: Gabe Black <gabeblack@google.com>
Tested-by: kokoro <noreply+kokoro@google.com>

x86: Fix some style issues in the microcode ROM class.

Change-Id: I64fb5efbc9f63298c103816503f4718308032eb4
Reviewed-on: https://gem5-review.googlesource.com/c/public/gem5/+/32896
Reviewed-by: Andreas Sandberg <andreas.sandberg@arm.com>
Maintainer: Gabe Black <gabeblack@google.com>
Tested-by: kokoro <noreply+kokoro@google.com>

x86: Style fix in the decoder class.

Change-Id: If06a8771b5db0fb68e88b16dedfe60fc2ce306d9
Reviewed-on: https://gem5-review.googlesource.com/c/public/gem5/+/32894
Reviewed-by: Andreas Sandberg <andreas.sandberg@arm.com>
Maintainer: Gabe Black <gabeblack@google.com>
Tested-by: kokoro <noreply+kokoro@google.com>

arch: Get the byte order from sys and not TheISA::.

This is a small step which localizes the use of TheISA, hopefully making
it easier to eliminate in the future.

Change-Id: I13472ed69e12a3c753e2dea91b9c7ca813bfc0e7
Reviewed-on: https://gem5-review.googlesource.com/c/public/gem5/+/32919
Reviewed-by: Andreas Sandberg <andreas.sandberg@arm.com>
Maintainer: Gabe Black <gabeblack@google.com>
Tested-by: kokoro <noreply+kokoro@google.com>

kern: Stop using TheISA::GuestByteOrder in Linux::dumpDmesg.

This value is already read from the system object in that same function.
We should use that instead of getting the value ourselves.

Change-Id: I0a442cd4892f50ad0179884bebf3eb52881c022f
Reviewed-on: https://gem5-review.googlesource.com/c/public/gem5/+/32924
Reviewed-by: Daniel Carvalho <odanrc@yahoo.com.br>
Reviewed-by: Andreas Sandberg <andreas.sandberg@arm.com>
Maintainer: Andreas Sandberg <andreas.sandberg@arm.com>
Tested-by: kokoro <noreply+kokoro@google.com>

arch: Don't add contents to the TheISA namespace in arch/generic.

Instead, add what you want other ISAs to be able to use to a generic,
fixed namespace, and then let those other ISAs bring those symbols in
with "using" if they want them.

Change-Id: I15bfaf56e76ffdc3bdb603deef4ad471211f4f24
Reviewed-on: https://gem5-review.googlesource.com/c/public/gem5/+/32929
Reviewed-by: Andreas Sandberg <andreas.sandberg@arm.com>
Maintainer: Andreas Sandberg <andreas.sandberg@arm.com>
Tested-by: kokoro <noreply+kokoro@google.com>

dev,arm: Stop using TheISA in ARM specific files.

These can use ArmISA since there's no ambiguity about what ISA is being
used with those files.

Change-Id: I02e8ea0ab70215679eb939adaa949400e878b1ed
Reviewed-on: https://gem5-review.googlesource.com/c/public/gem5/+/32928
Reviewed-by: Andreas Sandberg <andreas.sandberg@arm.com>
Maintainer: Andreas Sandberg <andreas.sandberg@arm.com>
Tested-by: kokoro <noreply+kokoro@google.com>

arch: Fix a small style issue in Linux::ThreadInfo.

Change-Id: I7f6f938f9412e535df0cbc0687ec9f2de2dbf8e3
Reviewed-on: https://gem5-review.googlesource.com/c/public/gem5/+/32918
Reviewed-by: Andreas Sandberg <andreas.sandberg@arm.com>
Reviewed-by: Hoa Nguyen <hoanguyen@ucdavis.edu>
Maintainer: Andreas Sandberg <andreas.sandberg@arm.com>
Tested-by: kokoro <noreply+kokoro@google.com>

cpu: Don't construct and then copy the decoder in SimpleThread.

The SimpleThread constructor was constructing a temporary copy of the
decoder, and then copying it into it's local version. This copy is a
waste, and also requires there to be a copy operator for the Decoder.

Change-Id: I1123b4ec767e08ceb2f108b3a6b19ca18d7c677c
Reviewed-on: https://gem5-review.googlesource.com/c/public/gem5/+/32900
Reviewed-by: Andreas Sandberg <andreas.sandberg@arm.com>
Maintainer: Andreas Sandberg <andreas.sandberg@arm.com>
Tested-by: kokoro <noreply+kokoro@google.com>

arch: Create a base class for decoders.

This base class doesn't actually hold anything yet, it's just a place to
add shared functionality or interfaces later.

Change-Id: Ia33217bd78b1d1ff3df3b2202095576a4e5d8153
Reviewed-on: https://gem5-review.googlesource.com/c/public/gem5/+/32897
Reviewed-by: Andreas Sandberg <andreas.sandberg@arm.com>
Maintainer: Andreas Sandberg <andreas.sandberg@arm.com>
Tested-by: kokoro <noreply+kokoro@google.com>

misc: Replace scalar TypedBufferArg with VPtr.

Change-Id: Ic8460ad133e3512c103b14820d90ee3df987d78d
Reviewed-on: https://gem5-review.googlesource.com/c/public/gem5/+/31755
Maintainer: Gabe Black <gabeblack@google.com>
Tested-by: kokoro <noreply+kokoro@google.com>
Reviewed-by: Ciro Santilli <ciro.santilli@arm.com>

arch-riscv: Fix disassembling of CSR instructions

The correct formats of CSR instructions are:
- mnemonic rd, csr, rs1
- mnemonic rd, csr, uimm

This patch fixes the problem.

Change-Id: Ie34e67a523e3458b90c27ca19f8c660b4775da6f
Signed-off-by: Ian Jiang <ianjiang.ict@gmail.com>
Reviewed-on: https://gem5-review.googlesource.com/c/public/gem5/+/32814
Reviewed-by: Jason Lowe-Power <power.jg@gmail.com>
Maintainer: Jason Lowe-Power <power.jg@gmail.com>
Tested-by: kokoro <noreply+kokoro@google.com>

configs,gpu-compute,mem-ruby: connect gmTokenPorts in apu_se

This patch adds gmTokenPorts to the ComputeUnit and RubyGPUCoalescer
python classes so the gmTokenPorts can be connected in apu_se.

Change-Id: Icf3cb05c757754d6935b46f14e4b1b1d5072c4ca
Reviewed-on: https://gem5-review.googlesource.com/c/public/gem5/+/32677
Reviewed-by: Matt Sinclair <mattdsinclair@gmail.com>
Reviewed-by: Anthony Gutierrez <anthony.gutierrez@amd.com>
Maintainer: Anthony Gutierrez <anthony.gutierrez@amd.com>
Tested-by: kokoro <noreply+kokoro@google.com>

misc: Rename CallbackQueue2 to CallbackQueue.

Now that the original CallbackQueue has been removed, CallbackQueue2 can
fully take it's place.

Issue-on: https://gem5.atlassian.net/browse/GEM5-698
Change-Id: I925f647cbbd393045a22f7cbd5d8b4d7d23d19b0
Reviewed-on: https://gem5-review.googlesource.com/c/public/gem5/+/32651
Reviewed-by: Andreas Sandberg <andreas.sandberg@arm.com>
Maintainer: Andreas Sandberg <andreas.sandberg@arm.com>
Tested-by: kokoro <noreply+kokoro@google.com>

base: Get rid the Callback type.

This leaves only the lambda/std::function based CallbackQueue2, soon to
be renamed just CallbackQueue.

Issue-on: https://gem5.atlassian.net/browse/GEM5-698
Change-Id: I4e2fd3b7b684c414be6db0e268284ab63e6cfdff
Reviewed-on: https://gem5-review.googlesource.com/c/public/gem5/+/32650
Reviewed-by: Andreas Sandberg <andreas.sandberg@arm.com>
Reviewed-by: Jason Lowe-Power <power.jg@gmail.com>
Maintainer: Jason Lowe-Power <power.jg@gmail.com>
Tested-by: kokoro <noreply+kokoro@google.com>

dev: Replace Callback in the virtio device with a lambda.

Issue-on: https://gem5.atlassian.net/browse/GEM5-698
Change-Id: Ia628ceb0080b11b81c7eee82e7c8c0049b2cd62f
Reviewed-on: https://gem5-review.googlesource.com/c/public/gem5/+/32649
Reviewed-by: Andreas Sandberg <andreas.sandberg@arm.com>
Maintainer: Andreas Sandberg <andreas.sandberg@arm.com>
Tested-by: kokoro <noreply+kokoro@google.com>

dev: Replace the Callback class with lambdas in ARM's flash devices.

Issue-on: https://gem5.atlassian.net/browse/GEM5-698
Change-Id: I2694dd1952b7412c27c83c9d15d4645899bd28e2
Reviewed-on: https://gem5-review.googlesource.com/c/public/gem5/+/32648
Reviewed-by: Jason Lowe-Power <power.jg@gmail.com>
Maintainer: Gabe Black <gabeblack@google.com>
Tested-by: kokoro <noreply+kokoro@google.com>

dev: Use lambdas instead of the Callback type for serial devices.

Issue-on: https://gem5.atlassian.net/browse/GEM5-698
Change-Id: Idb87fa0b90d14981fd61f997285f61b2ef304227
Reviewed-on: https://gem5-review.googlesource.com/c/public/gem5/+/32647
Reviewed-by: Andreas Sandberg <andreas.sandberg@arm.com>
Maintainer: Gabe Black <gabeblack@google.com>
Tested-by: kokoro <noreply+kokoro@google.com>

sim: Delete the unused PowerStateDumpCallback.

Issue-on: https://gem5.atlassian.net/browse/GEM5-698
Change-Id: I8e66f31a3a6a82564d9525021ada49ce52beb1fa
Reviewed-on: https://gem5-review.googlesource.com/c/public/gem5/+/32646
Reviewed-by: Andreas Sandberg <andreas.sandberg@arm.com>
Maintainer: Gabe Black <gabeblack@google.com>
Tested-by: kokoro <noreply+kokoro@google.com>

misc: Make the stats callbacks use CallbackQueue2.

Issue-on: https://gem5.atlassian.net/browse/GEM5-698
Change-Id: Idcbe04bdf4299925f321aa0ece263d86ed3fc8df
Reviewed-on: https://gem5-review.googlesource.com/c/public/gem5/+/32645
Reviewed-by: Andreas Sandberg <andreas.sandberg@arm.com>
Maintainer: Gabe Black <gabeblack@google.com>
Tested-by: kokoro <noreply+kokoro@google.com>

configs: Add import for FileSystemConfig in GPU_VIPER.py

GPU_VIPER.py uses FileSystemConfig to register CPUs and caches in SE
mode. Without the import, it crashes.

Change-Id: I539a4060d705f6e1b9a12aca7836eca271f61557
Reviewed-on: https://gem5-review.googlesource.com/c/public/gem5/+/32675
Reviewed-by: Matt Sinclair <mattdsinclair@gmail.com>
Reviewed-by: Jason Lowe-Power <power.jg@gmail.com>
Maintainer: Jason Lowe-Power <power.jg@gmail.com>
Tested-by: kokoro <noreply+kokoro@google.com>

configs: Replace DirMem w/RubyDirectoryMemory, set addr_ranges

This was originally from the GCN staging branch, which only had
GPU_VIPER.py, but the other GPU_VIPER configs had DirMem as well, so I
applied this change to all of them.

The patch replaces the Directory in DirCntrl from DirMem to
RubyDirectoryMemory. This fixes errors that DirMem caused relating to
setting class variables. It also generates and sets addr_ranges in
DirCntrl as RubyDirectoryMemory uses the parent object's addr_ranges
in its code

The style checker complained about a line length in GPU_VIPER_Region,
so the patch also fixes that

Change-Id: Icec96777a51d8a826b576fc752fae0f7f15427bc
Reviewed-on: https://gem5-review.googlesource.com/c/public/gem5/+/32674
Reviewed-by: Matt Sinclair <mattdsinclair@gmail.com>
Reviewed-by: Bradford Beckmann <brad.beckmann@amd.com>
Maintainer: Bradford Beckmann <brad.beckmann@amd.com>
Tested-by: kokoro <noreply+kokoro@google.com>

arch-arm: convert tlb to new style stats

Change-Id: I2a3f138b53496be6361a1a2b81fa471a56a4dc10
Reviewed-on: https://gem5-review.googlesource.com/c/public/gem5/+/32794
Reviewed-by: Giacomo Travaglini <giacomo.travaglini@arm.com>
Maintainer: Giacomo Travaglini <giacomo.travaglini@arm.com>
Tested-by: kokoro <noreply+kokoro@google.com>

arch-arm: Early checking if debug is enabled in TLB

The patch is aiming at speeding up gem5 execution.  The TLB::translateFs
is in the critical path of the simulator: every fetch + ld/st will make
use of it.
Checking all the time for a breakpoint during fetch is rather expensive;
it is better to make use of the cached booleans in SelfDebug to do an
early check to see if any of
Watchpoint/Breakpopint/VectorCatch/SoftwareStep is enabled.
Most workloads won't use them so there's no point on calling the
testDebug method

Change-Id: I0189b84e0dc2e081acce04ff44787b9f1014477c
Signed-off-by: Giacomo Travaglini <giacomo.travaglini@arm.com>
Reviewed-by: Richard Cooper <richard.cooper@arm.com>
Reviewed-by: Nikos Nikoleris <nikos.nikoleris@arm.com>
Reviewed-on: https://gem5-review.googlesource.com/c/public/gem5/+/32776
Tested-by: kokoro <noreply+kokoro@google.com>

arch-arm: Rename SelfDebug member variables

* enableFlag -> mde
The "enableFlag" variable, enabling the Breakpoint, Watchpoint, Vector
Catch exceptions is actually the cached version of MDSCR_EL1.MDE. The
"enableFlag" name looks too general as it's not covering the Software
Step exception case.

* bKDE -> kde
* bSDD -> sdd

The b prefix was likely referring to "breakpoint". However these bitfields
are actually used by watchpoints as well.

Change-Id: I48b762b32b2d763f4c4ceb7dcc28968cfb470fc1
Signed-off-by: Giacomo Travaglini <giacomo.travaglini@arm.com>
Reviewed-by: Nikos Nikoleris <nikos.nikoleris@arm.com>
Reviewed-on: https://gem5-review.googlesource.com/c/public/gem5/+/32775
Tested-by: kokoro <noreply+kokoro@google.com>
Reviewed-by: Richard Cooper <richard.cooper@arm.com>

arch-arm: Remove setters from SoftwareStep

Motivation:
Those helpers are used and meant to be used by the parent
(SelfDebug) class only. There is no point on exposing them to
the outer world. Better to make SelfDebug a friend class and to
allow it to access children's private data.

Change-Id: Ib945b1aa46742b90062ce7a5de563f164127075f
Signed-off-by: Giacomo Travaglini <giacomo.travaglini@arm.com>
Reviewed-by: Nikos Nikoleris <nikos.nikoleris@arm.com>
Reviewed-on: https://gem5-review.googlesource.com/c/public/gem5/+/32774
Reviewed-by: Richard Cooper <richard.cooper@arm.com>
Tested-by: kokoro <noreply+kokoro@google.com>

misc: Make registerExitCallback use CallbackQueue2.

Issue-on: https://gem5.atlassian.net/browse/GEM5-698
Change-Id: I526d4a19ca4e54a6469a4ee26693c1c0400fcc70
Reviewed-on: https://gem5-review.googlesource.com/c/public/gem5/+/32644
Reviewed-by: Andreas Sandberg <andreas.sandberg@arm.com>
Maintainer: Gabe Black <gabeblack@google.com>
Tested-by: kokoro <noreply+kokoro@google.com>

mem: Use the new type of CallbackQueue in the MemBackdoor.

Issue-on: https://gem5.atlassian.net/browse/GEM5-698
Change-Id: Ide40528f8c613b46204550d6e6840a7b274a366a
Reviewed-on: https://gem5-review.googlesource.com/c/public/gem5/+/32643
Reviewed-by: Andreas Sandberg <andreas.sandberg@arm.com>
Reviewed-by: Jason Lowe-Power <power.jg@gmail.com>
Maintainer: Jason Lowe-Power <power.jg@gmail.com>
Tested-by: kokoro <noreply+kokoro@google.com>

base: Add a new type of CallbackQueue.

This type is templated on what arguments the callbacks in it accept, and
it inherits directly from std::list instead of containing one and
forwarding selected members.

This version is called CallbackQueue2, but once all CallbackQueue
instances have been replaced it will be renamed to CallbackQueue.

Issue-on: https://gem5.atlassian.net/browse/GEM5-698
Change-Id: I32ab7454ea8c6a2af31cbcf5d4932a069ace1cb5
Reviewed-on: https://gem5-review.googlesource.com/c/public/gem5/+/32642
Reviewed-by: Jason Lowe-Power <power.jg@gmail.com>
Maintainer: Gabe Black <gabeblack@google.com>
Tested-by: kokoro <noreply+kokoro@google.com>

arch-riscv: Fix disassembling of all register instructions

How many Rs to output in disassembling register instructions? It does
not depend on wheather the register index is zero, but on the count
of source registers.

This patch fixes the problem.

Change-Id: I9a770722003bc6f4a259589a7471a506494d4c86
Signed-off-by: Ian Jiang <ianjiang.ict@gmail.com>
Reviewed-on: https://gem5-review.googlesource.com/c/public/gem5/+/32694
Reviewed-by: Jason Lowe-Power <power.jg@gmail.com>
Maintainer: Jason Lowe-Power <power.jg@gmail.com>
Tested-by: kokoro <noreply+kokoro@google.com>

arch-arm: convert table_walker to new style stats

Change-Id: I347a72d33e3d0eb9f60ac01dfa2cc82bdbae3cbb
Reviewed-on: https://gem5-review.googlesource.com/c/public/gem5/+/32494
Maintainer: Jason Lowe-Power <power.jg@gmail.com>
Tested-by: kokoro <noreply+kokoro@google.com>
Reviewed-by: Giacomo Travaglini <giacomo.travaglini@arm.com>

mem-cache,python: Allow custom TLB and events in each prefetcher.

The `BasePrefetcher` python class had members `_events` and `_tlbs`
defined as lists, meaning that any call to `list.append` on them would
affect `_events` and `_tlbs` for all prefetchers, not just the calling
object.  This change redefines them as instance members to fix the
problem.

Change-Id: I68feb1d6d78e2fa5e8775afba8c81c6dd0de6c60
Signed-off-by: Isaac Sánchez Barrera <isaac.sanchez@bsc.es>
Reviewed-on: https://gem5-review.googlesource.com/c/public/gem5/+/32394
Maintainer: Jason Lowe-Power <power.jg@gmail.com>
Tested-by: kokoro <noreply+kokoro@google.com>
Reviewed-by: Jason Lowe-Power <power.jg@gmail.com>
Reviewed-by: Nikos Nikoleris <nikos.nikoleris@arm.com>

util,systemc: Update the stats API used in one of the examples.

A new parameter as added to the initText method in March of this year,
but this example code was not updated which prevents it from compiling.

This change adds the parameter to the call and sets it to what the
documenting comments say is the default, true.

Change-Id: Ic8da46dba03f01f338c38a7bc02ba232a90ae349
Reviewed-on: https://gem5-review.googlesource.com/c/public/gem5/+/32641
Reviewed-by: Jason Lowe-Power <power.jg@gmail.com>
Maintainer: Gabe Black <gabeblack@google.com>
Tested-by: kokoro <noreply+kokoro@google.com>