This prints what values are read/written to LDS and the previous value
on write. This is useful for debugging problems with LDS instructions.
Change-Id: I30063327bec1a1a808914a018467d5d78d5d58b4
SDMA ptePde packets are generating a warning that a GART address is
missing, causing a wrong address to be clobbered by the operation.
This commit fixes this by converting the GART address when the queue is
running in privledged mode, which is the only mode allowed to use GART
addresses. This removes the warnings and writes to the correct memory
region.
Change-Id: I64acac308db2431c5996b876bf4cda704f51cf25
The VOP3 instruction encoding generally states that ABS/NEG modifiers in
the instruction encoding are only valid on floating point data types.
This is currently coded in gem5 to mean floating point *instructions*.
For untyped instructions like V_CNDMASK_B32, we don't actually know what
the data type is. We must trust that the compiler did not attempt to
apply these bits to non-FP data types.
This commit simply removes the asserts. The ABS/NEG modifiers are
therefore ignored which is consistent with the ISA documentation.
This is done on the lane manipulation instructions V_CNDMASK_B32,
V_READLINE_B32, and V_WRITELANE_B32 which are typically used to mask off
or move data between registers. Other bitwise instructions (e.g.,
V_OR_B32) keep the asserts as bitwise operations on FP types are
genernally illegal in languages like C++.
Change-Id: I478c5272ba96383a063b2828de21d60948b25c8f
Fixes several memory leaks, mostly of small and medium severity. Fixes
mismatched new/new[] and delete/delete[] calls.
Change-Id: Iedafc409389bd94e45f330bc587d6d72d1971219
The address has one too many zeros and is therefore placed in a memory
region usually used for system memory. As a result this causes failure
when trying to run a simulation with a huge amount of memory.
Change the address to be within the C000'0000h - FFFF'FFFFh X86 I/O hole
as was intended.
Change-Id: I5d03ac19ea3b2c01a8c431073c12fa1868b3df24
Three main fixes:
- Remove the initDynOperandInfo. UBSAN errors and exits due to things
not being captured properly. After a few failed attempts playing with
the capture list, just move the lambda to a new method.
- Invalid data type size for some thread mask instructions. This might
actually have caused silent bugs when the thread id was > 31.
- Alignment issues with the operands.
Change-Id: I0297e10df0f0ab9730b6f1bd132602cd36b5e7ac
From sepc
> Instructions that access a non-existent CSR are reserved. Attempts to
access a CSR without appropriate privilege level raise
illegal-instruction exceptions or, as described in Section 13.6.1,
virtual-instruction exceptions. Attempts to write a read-only register
raise illegal-instruction exceptions. A read/write register might also
contain some bits that are read-only, in which case writes to the
read-only bits are ignored.
Setting the bit not in the mask should be ignore rather than raise the
illegal exception. The unmask bits of xstatus CSR are `WPRI`, the
unmasks bits of xie are `RO`(above priv v1.12) or `WPRI`(priv v1.11 and
priv v1.10), the unmask bits of xip CSR are `RO`(above priv v1.12) or
`WPRI`(priv v1.11) or `WIRI` (priv v1.10).
Note: The workload of `riscv-ubuntu-20.04-boot` uses the priv v1.10.
More details please see the `RISC-V spec: Privileged Architecture`
v1.10:
https://github.com/riscv/riscv-isa-manual/releases/tag/riscv-priv-1.10
v1.11(20190608):
https://github.com/riscv/riscv-isa-manual/releases/tag/Ratified-IMFDQC-and-Priv-v1.11
v1.12(20211213):
https://github.com/riscv/riscv-isa-manual/releases/tag/Priv-v1.12
Change-Id: I5d6e964e99b30b71da3dc267cd1575665d922633
Currently, the filesRootDir is prepended for all paths that do not start
with '/'. However, we should not be doing this for the special files :tt
and :semihosting-features. Noticed this while testing semihosting with a
non-empty filesRootDir.
Change-Id: I156c8b680cb71cdc88788be3b0e93fc1d52e11e5
This PR added RISC-V Integer Conditional Operations Extension, which is
in the RVA23U64 Profile Mandatory Base. And the performance of
conditional move instructions in micro-architecture is an interesting
point to explore.
Zicond instructions added: czero.eqz, czero.nez
Changes based on spec:
https://github.com/riscvarchive/riscv-zicond/releases/download/v1.0.1/riscv-zicond_1.0.1.pdf
As discussed in https://github.com/orgs/gem5/discussions/954:
In the refactor made by commit f65df9b959 conditional indirect
branches are no longer updated in the indirect predictor.
This kind of branches do not exist in x86 neither arm, but they are
present in PowerPC.
This patch, enables the indirect predictor to track this kind of
branches.
In the payload event queue in Gem5ToTlmBridgeBase, the phase is checked
twice for BEGIN_RESP. This commit removes the second if clause since it
is unnecessary.
Duplicate if clause in line 234 & line 256
dd2689905f/src/systemc/tlm_bridge/gem5_to_tlm.cc (L234-L267)
please correct me if I am missing something important
Fix#1055. Prioritize committing from exiting threads before we consider
other threads using the specified SMT commit policy. All instructions in
the ROB for exiting threads should already have been squashed. Thus,
this ensures that the ROB instruction queues for all exiting threads
will be empty at the end of the current cycle, avoiding the assertion
failure encountered in #1055.
Change-Id: Ib0178a1aa6e94bce2b6c49dd87750e82776639dc
Fix#1042. Clear the current fetch macro-op if the instruction
initiating the squash is the last micro-op in its macro-op.
Change-Id: I77f60334771277e47f19573d4067b3a7bc5488b2
Fix#1044. This patch adds checks for message types (PUTX_COPY, DATA,
DATA_EXCLUSIVE) that contain data blocks but were missing from the
original `functionalRead` method in MESI Three-Level messages.
Change-Id: I0cedc314166c9cc037bf20f5b7fef5552dd1253c
A usual system register read/write pattern is something like the
following
```
switch(el) {
case EL1:
tc->readMiscReg(REG_EL1);
case EL2:
tc->readMiscReg(REG_EL2);
case EL3:
tc->readMiscReg(REG_EL3);
}
```
To avoid repeating these switch statements all over gem5, we define
templated functions which have
an accessor struct as a template parameter. These accessor will help
populating the templated switch
construct. We provide the FAR register accessor as an example. The
accessor should define the following
fields: (type, el0, el1, el2, el3)
Example:
```
struct FarAccessor
{
using type = RegVal;
static const MiscRegIndex el0 = NUM_MISCREGS;
static const MiscRegIndex el1 = MISCREG_FAR_EL1;
static const MiscRegIndex el2 = MISCREG_FAR_EL2;
static const MiscRegIndex el3 = MISCREG_FAR_EL3;
};
```
Fix#1064 by adding support for hardware performance counters on hybrid
architectures like Intel Alder Lake.
Hybrid architectures have multiple types of cores, each of which require
the instantiation of a separate performance counter. The KVM CPU's
PerfKvmCounter class was not aware of this, any only instantiated a
single performance counter, implicitly bound to the P-core only. This
meant that if gem5 ever ran on an E-core, the various hardware
performance counters would not get updated properly, in some cases
always zero (e.g., for the number of instructions executed).
This patch adds support for hybrid host architectures as follows. First,
we convert PerfKvmCounter into an abstract class, which has two concrete
implementations: SimplePerfKvmCounter and HybridPerfKvmCounter. The
former is used for non-hybrid architectures or for non-hardware
performance counters and is functionally equivalent to the prior
implementation of PerfKvmCounter. The latter is used for instantiating
hardware performance counters (i.e., of type PERF_TYPE_HARDWARE) on
hybrid host architectures. It does so by internally instantiating two
SimplePerfKvmCounters, one for a P-core and one for an E-core. Upon
read, it sums the results of reading the two internal counters.
Change-Id: If64fcb0e2fcc1b3a6a37d77455c2b21e1fc81150
Use it accordingly in the faulting/exception logic
Change-Id: I2f6360d04698b6fb7188e776f1d6966e99ce19b1
Signed-off-by: Giacomo Travaglini <giacomo.travaglini@arm.com>
Reviewed-by: Richard Cooper <richard.cooper@arm.com>
This is adding two templated functions for reading/writing
system registers (MiscRegs). It is introducing them inside
a new misc_regs namespace.
Change-Id: I21233337c057673d46d1147971ebabbfc2c2bb6a
Signed-off-by: Giacomo Travaglini <giacomo.travaglini@arm.com>
Reviewed-by: Richard Cooper <richard.cooper@arm.com>
This reverts commit c1de2b8762. We revert
the commit as Ruby does not use get_runtime_isa anymore after [1]
[1]: https://github.com/gem5/gem5/pull/241
Change-Id: Iaac8d64194bbd53a9b1a57a796ff92f763c75a87
This PR is refactoring the Arm PageTableWalker in the following way:
1) Simplifying the currState handling logic (mainly the tear down)
2) Amending the TlbTestInterface APIs to use a RequestPtr reference
3) Use finalizePhysical even when MMU is off, which means allowing
memory mapped m5ops to work also in that circumstance
Remove the requirement in TreePLRU's implementation that the number of
leaves (i.e., the number of cache ways) be a power of two. Firstly, on
some recent processors, this is not the case---for example, Intel Golden
Cove's L1D has 12 ways. Secondly, The implementation of TreePLRU appears
to work just fine as-is with a way count that's not a power of two.
Change-Id: If2a27dc5bbe7a8e96684f79ce791df5c0b582230
Now that the Request has been made an Extensible object, it
can carry within itself much more data. It makes sense
to pass it to the TlbTestInterface as more information about
the table walk can be extracted from it.
This is also aligning with the testTranslation utility which
is expecting a request reference as first argument.
Change-Id: I3dbc9a81d6b4bcc1801246ba7eb4136774d8f3c7
Signed-off-by: Giacomo Travaglini <giacomo.travaglini@arm.com>
Reviewed-by: Andreas Sandberg <andreas.sandberg@arm.com>
Reviewed-by: Richard Cooper <richard.cooper@arm.com>
They both make final checks to the VA->PA translation before
relinquishing control back to the translate client (usually
CPU code)
Change-Id: Ib0a9da25404248c22c6a240817d2f50f0913fdf7
Signed-off-by: Giacomo Travaglini <giacomo.travaglini@arm.com>
Reviewed-by: Andreas Sandberg <andreas.sandberg@arm.com>
Reviewed-by: Richard Cooper <richard.cooper@arm.com>
The finalizePhysical is just checking if the physical
address falls within the m5op region (if using mmapped
m5ops). There's not reason why we shouldn't enable it
with virtual memory off
Change-Id: I5ab80fd4e7886743abd4b7d85937b72253b578d3
Signed-off-by: Giacomo Travaglini <giacomo.travaglini@arm.com>
Reviewed-by: Andreas Sandberg <andreas.sandberg@arm.com>
Reviewed-by: Richard Cooper <richard.cooper@arm.com>
We also unify the fault handling logic; rather than cleaning
up the WalkerState in several places scattered throughout the
walking code, we handle faults in the top level method
Change-Id: Ia22fb6f27044ff445fffbab228777a48efa473cb
Signed-off-by: Giacomo Travaglini <giacomo.travaglini@arm.com>
Reviewed-by: Richard Cooper <richard.cooper@arm.com>
It's more efficient to pass a reference of the tester to the
TableWalkers. In this way a table walk check is tested directly
from the walkers instead of going through the MMU every time.
Change-Id: I9820dbabb8b551981005a65efa54a76b1a027541
Signed-off-by: Giacomo Travaglini <giacomo.travaglini@arm.com>
Reviewed-by: Andreas Sandberg <andreas.sandberg@arm.com>
Reviewed-by: Richard Cooper <richard.cooper@arm.com>
This is done in order to differentiate between EL0 (unprivileged) and
EL1. Effectively it won't change much as most of the decisions are
now taken according to the translation regime which will be the
same regardless (EL10)
Change-Id: I218037e9c19cf638aff05c51869e439204d9af69
Signed-off-by: Giacomo Travaglini <giacomo.travaglini@arm.com>
Reviewed-by: Richard Cooper <richard.cooper@arm.com>
Reviewed-by: Andreas Sandberg <andreas.sandberg@arm.com>
Add support for event overflows when the host thread migrates across
differnt types of cores on a hybrid host architecture. This patch
achieves this by simply halving the sample period for each performance
counter. Since there are two types of cores, this guarantees that an
overflow event will trigger before N events occur, where N is the
requested period (e.g., number of instructions to simulate). This
may result in many early triggers (up to log2(N)) before the requested
period is reached. However, gem5's existing bookkeeping logic already
handles this case properly: if fewer events than requested occurred,
it will set a new period (N - observed) and resume execution. This loop
will exit once N events have actually occurred.
Change-Id: Iff85237da1ae1aa25bc2045fbf9091726291fe36
Fix#1064 by adding support for hardware performance counters on hybrid
architectures like Intel Alder Lake.
Hybrid architectures have multiple types of cores, each of which require
the instantiation of a separate performance counter. The KVM CPU's
PerfKvmCounter class was not aware of this, any only instantiated a
single performance counter, implicitly bound to the P-core only. This
meant that if gem5 ever ran on an E-core, the various hardware
performance counters would not get updated properly, in some cases
always zero (e.g., for the number of instructions executed).
This patch adds support for hybrid host architectures as follows. First,
we convert PerfKvmCounter into an abstract class, which has two
concrete implementations: SimplePerfKvmCounter and HybridPerfKvmCounter.
The former is used for non-hybrid architectures or for non-hardware
performance counters and is functionally equivalent to the prior
implementation of PerfKvmCounter. The latter is used for instantiating
hardware performance counters (i.e., of type PERF_TYPE_HARDWARE) on
hybrid host architectures. It does so by internally instantiating two
SimplePerfKvmCounters, one for a P-core and one for an E-core. Upon
read, it sums the results of reading the two internal counters.
Change-Id: If64fcb0e2fcc1b3a6a37d77455c2b21e1fc81150
- After removal of the ClientWrapper class, the mocking of clients needs
to be changed to _create_client function.
- Commented failing tests due to persistence issues.
The persistence is being caused as the new mocked clients
not being used as the older clients are persisting over
the tests.
Change-Id: Ie342c9fc8103504dd12f49ae30b3bf62d189ce1d
- There was a bug in JSONClient when searching
for resoruces. The id was not checked and
the booleans were not set to true when
optional search queries like resource_version
and gem5_version are not passed.
Change-Id: I4aa7c5388035144ec6864d57130ad09e6709692e
The "linux/limits.h" equivalent on Apple systems is "sys/syslimits.h".
By adding an include guard to include the correct header dependent on
the host system, we can compile m5term on Mac OS systems.
This is not needed with upload-artifact v4 directories are archived and
compressed by default.
This zip step was also causing Daily/Weekly test failures due to not
running `apt update` before the `apt install` for the zip utility. Ergo
this patch fixes these errors.
A user reported a bug with the SSE4.1 version of memcmp in libc. When
enabled the simulated program crashes with SIGILL. After attempting all
fixes recommended by Intel SDM and still not working, turning the bit
off instead.
Similar, the default XSAVE functionality is not completely implemented
for AVX and newer ISA extensions. Therefore, there is not much point to
claiming to support the more advanced versions of XSAVE (XSAVEOPT,
XSAVEC, XSAVES, and XGETBV with ECX=1).
Note that none of these bits are enabled for non-GPU full system
simulations (see src/arch/x86/X86ISA.py). This only impacts GPUFS
simulations.
Change-Id: I8eb7bf0f2a0a29226095e7889fec9c1e8a65f88f
Due to an oversight, the PyUnit tests were not being run as part of the
gem5 CI tests. This was because they are located in "tests/pyunit"
instead of "tests/gem5", where the CI GitHub Action workflow searched
for tests to run and where all other tests reside.
This adds the Pyunit tests as a seperate job in the CI GitHub Action's
workflow.
Due to an oversight, the PyUnit tests were not being run as part of the
gem5 CI tests. This was because they are located in "tests/pyunit"
instead of "tests/gem5", where the CI GitHub Action workflow searched
for tests to run and where all other tests reside.
This adds the Pyunit tests as a seperate job in the CI GitHub Action's
workflow.
Change-Id: I63d93571fde11c19bf3d281c034eddf4b455ae4e
