This is still triggered by the generic mechanism that tries out all
paths to go from an object file to a process. That's not entirely
necessary since the only loader that should be used when using the
X86ISA::EmuLinux workload is the one it provides, but the rest of gem5
isn't ready for that change yet.
This removes the last lingering reason to keep around the
arch/x86/linux/process.(hh|cc) files, so they have been deleted.
Change-Id: I425b95c9c730f31291790d63bc842e2c0092960d
Reviewed-on: https://gem5-review.googlesource.com/c/public/gem5/+/33904
Reviewed-by: Gabe Black <gabe.black@gmail.com>
Reviewed-by: Alexandru Duțu <alexandru.dutu@amd.com>
Reviewed-by: Bobby R. Bruce <bbruce@ucdavis.edu>
Maintainer: Gabe Black <gabe.black@gmail.com>
Tested-by: kokoro <noreply+kokoro@google.com>
The TLBIALL op in gem5 was designed after the AArch32 TLBIALL instruction.
and was reused by the TLBI ALLEL1, ALLE2, ALLE3 logic.
This is not correct for the following reasons:
- TLBI ALLEx invalidates regardless of the VMID
- TLBI ALLEx (AArch64) is "target regime" oriented, whereas TLBIALL
(AArch32) is "current regime" oriented
TLBIALL has a different behaviour depending on the current exception
level: if issued at EL1 it will invalidate stage1 translations only; if
at EL2, it will invalidate stage2 translations as well.
TLBI ALLEx is more standard; every TLBI ALLE1 will invalidate stage1 and
stage2 translations. This is because the instruction is not executable
from the guest (EL1)
So for TLBIALL the condition for stage2 forwarding will be:
if (!isStage2 && isHyp) {
Whereas for TLBI ALLEx will be:
if (!isStage2 && target_el == EL1) {
Change-Id: I282f2cfaecbfc883e173770e5d2578b41055bb7a
Signed-off-by: Giacomo Travaglini <giacomo.travaglini@arm.com>
Reviewed-on: https://gem5-review.googlesource.com/c/public/gem5/+/35241
Reviewed-by: Andreas Sandberg <andreas.sandberg@arm.com>
Maintainer: Andreas Sandberg <andreas.sandberg@arm.com>
Tested-by: kokoro <noreply+kokoro@google.com>
The create() method on Params structs usually instantiate SimObjects
using a constructor which takes the Params struct as a parameter
somehow. There has been a lot of needless variation in how that was
done, making it annoying to pass Params down to base classes. Some of
the different forms were:
const Params &
Params &
Params *
const Params *
Params const*
This change goes through and fixes up every constructor and every
create() method to use the const Params & form. We use a reference
because the Params struct should never be null. We use const because
neither the create method nor the consuming object should modify the
record of the parameters as they came in from the config. That would
make consuming them not idempotent, and make it impossible to tell what
the actual simulation configuration was since it would change from any
user visible form (config script, config.ini, dot pdf output).
Change-Id: I77453cba52fdcfd5f4eec92dfb0bddb5a9945f31
Reviewed-on: https://gem5-review.googlesource.com/c/public/gem5/+/35938
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>
There has been some testing of this wrapper, but some components are
missing. It's not currently possible to read or set Misc registers,
64 bit integer registers, flattened integer registers, or vector
registers. In some cases that's because no mapping from gem5 indexes
to IRIS resource names has been set up, but in some cases, since R52
is 32 bit, no mapping *can* be set up, and we need to figure out what
to do with requests for 64 bit only state.
Change-Id: I2d650a7c1765b39f25058727502c96e6de5aa26b
Reviewed-on: https://gem5-review.googlesource.com/c/public/gem5/+/35635
Reviewed-by: Giacomo Travaglini <giacomo.travaglini@arm.com>
Maintainer: Gabe Black <gabeblack@google.com>
Tested-by: kokoro <noreply+kokoro@google.com>
These regular expressions search code snippets to find places where
operands are used. Rather than build them explicitly at the end of
processing the operands{{}} construct, wait until they're first going to
be used. That way, we'll be able to define operands in as many places as
we want, as long as we've done all we're going to do before the first
instructions are defined.
This will pave the way to defining operands in regular python in let
blocks, and then possibly outside of the parser altogether, perhaps into
scons where having lots of output files for individual instructions will
be easier to manage. For now, this just lets you define multiple
operands blocks which is not all that exciting on its own :)
Change-Id: I1179092316c1c0ac2613810bfd236a32235502fb
Reviewed-on: https://gem5-review.googlesource.com/c/public/gem5/+/35237
Reviewed-by: Jason Lowe-Power <power.jg@gmail.com>
Reviewed-by: Richard Cooper <richard.cooper@arm.com>
Reviewed-by: Steve Reinhardt <stever@gmail.com>
Maintainer: Gabe Black <gabeblack@google.com>
Tested-by: kokoro <noreply+kokoro@google.com>
This includes the filterDoubles function which adds code to combine 32
bit values into doubles or 64 bit values for floating point, and the
splitOutImm function which detects if the code that implements an
instruction has a register and immediate variant, and generates code for
each.
Change-Id: I5524b9acd6e610b51fd91fe70276c34c23be9f85
Reviewed-on: https://gem5-review.googlesource.com/c/public/gem5/+/35235
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>
With some exceptions (in arm/x86) the standard memory read/write interface
for instructions relies upon the helper functions in
src/arch/generic/memhelpers.hh
which wrap the ExecContext interface.
(readMem, writeMem...)
Those helpers rely on the source/destination data to be provided (as
expected) but not on the size of the transaction. The latter gets
evaluated via the host size of the source/destination data
(sizeof(MemT)).
For this reason some instructions, which are instead using an
incompatible MemT data (as an example, a SIMD operation loading data in
an array of integers), make direct use of the ExecContext interface,
which is simply requesting for a pointer and a number of bytes.
Some other instructions are using the ExecContext interface since the
helpers do not accept a byteEnable argument.
This patch is adding some helpers to address these issues. The idea is
to deprecate direct usage of the ExecContext APIs.
These new wrappers do not work with the type detection mechanism
to evaluate the number of bytes we are accessing.
JIRA: https://gem5.atlassian.net/browse/GEM5-196
Change-Id: I5b822d278bdf325a68a01aa1861b6487c6628245
Signed-off-by: Giacomo Travaglini <giacomo.travaglini@arm.com>
Reviewed-on: https://gem5-review.googlesource.com/c/public/gem5/+/23527
Tested-by: kokoro <noreply+kokoro@google.com>
Reviewed-by: Gabe Black <gabeblack@google.com>
Reviewed-by: Daniel Carvalho <odanrc@yahoo.com.br>
Maintainer: Gabe Black <gabeblack@google.com>
This brings the ISA parser in line with the style guide. Note that the
docstring needs to be a single string literal for python to consider it
a docstring, and the parser itself needs each line of the docstring to
be a rule in its CFG. We can accomplish both by taking advantage of the
fact that two directly adjacent quoted strings are treated as a single
string literal by python, and by escaping the newline so that they're
actually considered adjacent.
Change-Id: I7f4d252998877808425aafb0159600ba4c3bf9ad
Reviewed-on: https://gem5-review.googlesource.com/c/public/gem5/+/35276
Reviewed-by: Giacomo Travaglini <giacomo.travaglini@arm.com>
Maintainer: Giacomo Travaglini <giacomo.travaglini@arm.com>
Tested-by: kokoro <noreply+kokoro@google.com>
This change replaces the __attribute__ syntax with the now standard [[]]
syntax. It also reorganizes compiler.hh so that all special macros have
some explanatory text saying what they do, and each attribute which has a
standard version can use that if available and what version of c++ it's
standard in is put in a comment.
Also, the requirements as far as where you put [[]] style attributes are
a little more strict than the old school __attribute__ style. The use of
the attribute macros was updated to fit these new, more strict
requirements.
Change-Id: Iace44306a534111f1c38b9856dc9e88cd9b49d2a
Reviewed-on: https://gem5-review.googlesource.com/c/public/gem5/+/35219
Reviewed-by: Daniel Carvalho <odanrc@yahoo.com.br>
Maintainer: Gabe Black <gabeblack@google.com>
Tested-by: kokoro <noreply+kokoro@google.com>
This macro probably would have been defined to "return" in some cases,
to be put after a call to a function that doesn't return so that the
compiler wouldn't think control would reach the end of a non-void
function. It was only ever defined to expand to nothing, and now that
[[noreturn]] is a standard attribute, it should never be needed going
forward.
Change-Id: I37625eab72deeaede77f9347116b9fddd75febf7
Reviewed-on: https://gem5-review.googlesource.com/c/public/gem5/+/35217
Reviewed-by: Daniel Carvalho <odanrc@yahoo.com.br>
Maintainer: Gabe Black <gabeblack@google.com>
Tested-by: kokoro <noreply+kokoro@google.com>
