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author | Iru Cai <mytbk920423@gmail.com> | 2019-02-28 17:07:16 +0800 |
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committer | Iru Cai <mytbk920423@gmail.com> | 2019-05-31 15:50:11 +0800 |
commit | a4c6e88d766858b675a7fd256df5a8b9a7e18ada (patch) | |
tree | a00f59eea3e87c31eb9efbce9f8d6f397ae16db2 /src/arch/arm/tlb.cc | |
parent | 866b200c202dded37fdd857a1a42ec149bd109c9 (diff) | |
download | gem5-a4c6e88d766858b675a7fd256df5a8b9a7e18ada.tar.xz |
import invisispec-1.0 source by Mengjia Yan
The original code is at https://github.com/mjyan0720/InvisiSpec-1.0
This code is rebased on upstream gem5 commit 866b200c, which features:
- rdtscp support
- some C++ code optimizations
- newer Linux kernel version number in SE mode
Diffstat (limited to 'src/arch/arm/tlb.cc')
-rw-r--r-- | src/arch/arm/tlb.cc | 16 |
1 files changed, 16 insertions, 0 deletions
diff --git a/src/arch/arm/tlb.cc b/src/arch/arm/tlb.cc index 46056d07b..25e210b55 100644 --- a/src/arch/arm/tlb.cc +++ b/src/arch/arm/tlb.cc @@ -539,6 +539,11 @@ TLB::regStats() .name(name() + ".prefetch_faults") .desc("Number of TLB faults due to prefetch") ; + + specTLBMisses + .name(name() + ".spec_tlb_misses") + .desc("Number of TLB misses from a speculative mem instructions") + ; domainFaults .name(name() + ".domain_faults") @@ -1434,6 +1439,17 @@ TLB::getTE(TlbEntry **te, const RequestPtr &req, ThreadContext *tc, Mode mode, vaddr_tainted, ArmFault::PrefetchTLBMiss, isStage2); } + if (req->isSpec()) { + // if the request is a prefetch don't attempt to fill the TLB or go + // any further with the memory access (here we can safely use the + // fault status for the short desc. format in all cases) + specTLBMisses++; + //FIXME: currently resue the prefetch tlbmiss fault + //do not want to introduce new fault declaration + return std::make_shared<PrefetchAbort>( + vaddr_tainted, ArmFault::PrefetchTLBMiss, isStage2); + } + if (is_fetch) instMisses++; else if (is_write) |