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Published 20 hours ago • verified publisher icon openhwgroup

[BUG] SFENCE.VMA Cases in Shared TLB

Open fatimasaleem opened this issue 2 years ago • 0 comments

Is there an existing CVA6 bug for this?

  • [X] I have searched the existing bug issues

Bug Description

There are four different cases of sfence.vma that are used to flush the TLBs. For example, as these four cases are implemented in TLB here.

But in the design implementation of Shared TLB these cases are not added. Upon committing SFENCE.VMA, the shared TLB is completely flushed, which may not be the desired scenario. Shared TLB should also implement the four sfence.vma cases, as this will impact the performance in the long run.

fatimasaleem avatar Sep 19 '23 15:09 fatimasaleem