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TLB Conflict abort

Hi All,

I want to check TLB Conflict abort.

How can I create an address which matches multiple entries in the TLB as ARMv8 spec mentioned.

ARMv8 spec:

"An address can hit multiple entries in the TLB if the TLB has been invalidated inappropriately, for example if TLB
invalidation required by the architecture has not been performed."

Thanks,

Top replies

Martin Weidmann over 5 years ago +2 verified

It's quite hard to come up with a sequence which definitely generates the exception, as you don't have precise control of the MMU. But try something like this: Map a 4KB page (address X) Touch that...

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0 Martin Weidmann over 5 years ago in reply to hntuan94

Which model are using? If it's the AEM FVP, you need to enable TLB conflict reporting:

-C cluster0.has_tlb_conflict_abort=1
-C cluster1.has_tlb_conflict_abort=1

Or, for the single cluster systems:

-C cluster.has_tlb_conflict_abort=1
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0 Martin Weidmann over 5 years ago in reply to hntuan94

Which model are using? If it's the AEM FVP, you need to enable TLB conflict reporting:

-C cluster0.has_tlb_conflict_abort=1
-C cluster1.has_tlb_conflict_abort=1

Or, for the single cluster systems:

-C cluster.has_tlb_conflict_abort=1
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Up 0 Down

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