# \[PATCH -V2 0/9\] arch/powerpc: Add 64TB support to ppc64

- From: Aneesh Kumar K.V \<hidden\>
- Date: 2012-07-05 08:29:09 
- List: linuxppc-dev
- Page: https://ratatoskr.run/linuxppc-dev/2012/07/9470037
- Thread: https://ratatoskr.run/linuxppc-dev/2012/07/9470037/t.md

```text
Hi,

This patchset include patches for supporting 64TB with ppc64. I haven't booted
this on hardware with 64TB memory yet. But they boot fine on real hardware with
less memory. Changes extend VSID bits to 38 bits for a 256MB segment
and 26 bits for 1TB segments. 

Changes from V1:
* Drop the usage of structure (struct virt_addr) to carry virtual address.
  We now represent virtual address via vpn which is virtual address shifted 
  right 12 bits.

Thanks,
-aneesh
```