Please note: We are aware of an issue affecting replies on the Arm Community forums, which may not be loading as expected.

We apologize for any inconvenience and appreciate your patience while we investigate and work to resolve the issue.

Thank you for your understanding.

  • State Accepted Answer
  • +1 person also asked this people also asked this
  • Locked Locked
  • Replies 1 reply
  • Subscribers 347 subscribers
  • Views 4241 views
  • Users 0 members are here
Options
Related
This discussion has been locked.
You can no longer post new replies to this discussion. If you have a question you can start a new discussion

ARMV8 48-vs-52-bit mode

KamGators

What are the advantages and disadvantages of using 48-bit -vs- 52-bit addressing in armv8 processors?  Other than the obvious 52-bit gives more address space are there any drawbacks to use it etc..?

 

thx

  • +1

    Well extra software and hardware is needed to implement it. I don't think the extra level in the page tables will have a noticeable space or time penalty. I can't think of anything this particularly helps in software besides just providing more space.  On the plus side if you have a system that needs enough physical memory to require it I think you'll have definite bragging rights. ;-)