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| author | Iru Cai <mytbk920423@gmail.com> | 2019-04-17 10:54:51 +0800 |
|---|---|---|
| committer | Iru Cai <mytbk920423@gmail.com> | 2019-04-17 10:54:51 +0800 |
| commit | 30488f4a29e9092e0d0dd304ec113dcc92e171f4 (patch) | |
| tree | fff1e24c94b44f8fbaa2fff3f9b676ca337b6d21 /src | |
| parent | bf35a9ab1e9664846c9e03c9ffa5eba589bed159 (diff) | |
| download | gem5-30488f4a29e9092e0d0dd304ec113dcc92e171f4.tar.xz | |
add a trackBranch option
Diffstat (limited to 'src')
| -rw-r--r-- | src/cpu/o3/O3CPU.py | 1 | ||||
| -rw-r--r-- | src/cpu/o3/lsq_unit.hh | 1 | ||||
| -rw-r--r-- | src/cpu/o3/lsq_unit_impl.hh | 9 |
3 files changed, 7 insertions, 4 deletions
diff --git a/src/cpu/o3/O3CPU.py b/src/cpu/o3/O3CPU.py index 1a97faced..11a2133e6 100644 --- a/src/cpu/o3/O3CPU.py +++ b/src/cpu/o3/O3CPU.py @@ -170,6 +170,7 @@ class DerivO3CPU(BaseCPU): needsTSO = Param.Bool(False, "Enable TSO Memory model") allowSpecBuffHit = Param.Bool(True, "Enable hit/reuse spec buffer entries") useIFT = Param.Bool(False, "use IFT to filter") + trackBranch = Param.Bool(True, "Track tainted branches") def addCheckerCpu(self): if buildEnv['TARGET_ISA'] in ['arm']: diff --git a/src/cpu/o3/lsq_unit.hh b/src/cpu/o3/lsq_unit.hh index c512ef819..fbe5248f7 100644 --- a/src/cpu/o3/lsq_unit.hh +++ b/src/cpu/o3/lsq_unit.hh @@ -529,6 +529,7 @@ class LSQUnit { bool isFuturistic; bool allowSpecBuffHit; bool useIFT; + bool trackBranch; /* [mengjia] different schemes determine values of 4 variables. */ // Will also need how many read/write ports the Dcache has. Or keep track diff --git a/src/cpu/o3/lsq_unit_impl.hh b/src/cpu/o3/lsq_unit_impl.hh index f22383506..9d71c2093 100644 --- a/src/cpu/o3/lsq_unit_impl.hh +++ b/src/cpu/o3/lsq_unit_impl.hh @@ -232,9 +232,10 @@ LSQUnit<Impl>::init(O3CPU *cpu_ptr, IEW *iew_ptr, DerivO3CPUParams *params, needsTSO = params->needsTSO; allowSpecBuffHit = params->allowSpecBuffHit; useIFT = params->useIFT; + trackBranch = params->trackBranch; cprintf("Info: simulation uses scheme: %s; " - "needsTSO=%d; allowSpecBuffHit=%d; useIFT=%d\n", - scheme, needsTSO, allowSpecBuffHit, useIFT); + "needsTSO=%d; allowSpecBuffHit=%d; useIFT=%d; trackBranch=%d\n", + scheme, needsTSO, allowSpecBuffHit, useIFT, trackBranch); // [mengjia] end of setting configuration variables resetState(); @@ -1033,7 +1034,7 @@ LSQUnit<Impl>::updateVisibleState() /* set taint for dst registers */ inst->taintDestRegs(true, "unsafe load"); bool doSpecLoad = false; - if (inst->afterTaintedBranch) { + if (trackBranch && inst->afterTaintedBranch) { doSpecLoad = true; DPRINTF(LSQUnit, "load inst [sn:%lli] %s is after a tainted branch.\n", inst->seqNum, inst->pcState()); } else if (inst->srcTainted()) { @@ -1083,7 +1084,7 @@ LSQUnit<Impl>::updateVisibleState() if (inst->needPostFetch()) { doSpecLoad = true; DPRINTF(LSQUnit, "load inst [sn:%lli] %s needs post fetch.\n", inst->seqNum, inst->pcState()); - } else if (inst->afterTaintedBranch) { + } else if (trackBranch && inst->afterTaintedBranch) { doSpecLoad = true; DPRINTF(LSQUnit, "load inst [sn:%lli] %s is after a tainted branch.\n", inst->seqNum, inst->pcState()); } else if (inst->srcTainted()) { |