| Subject | Re: [RFC v5 01/38] powerpc: Free up four 64K PTE bits in 4K backed HPTE pages | From | Balbir Singh <> | Date | Fri, 07 Jul 2017 17:25:58 +1000 |
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On Wed, 2017-07-05 at 14:21 -0700, Ram Pai wrote: > Rearrange 64K PTE bits to free up bits 3, 4, 5 and 6, > in the 4K backed HPTE pages.These bits continue to be used > for 64K backed HPTE pages in this patch, but will be freed > up in the next patch. The bit numbers are big-endian as > defined in the ISA3.0 > > The patch does the following change to the 4k htpe backed > 64K PTE's format. >
The diagrams make the patch much easier to understand, thanks!
<snip>
> NOTE:even though bits 3, 4, 5, 6, 7 are not used when > the 64K PTE is backed by 4k HPTE, they continue to be > used if the PTE gets backed by 64k HPTE. The next > patch will decouple that aswell, and truely release the > bits. >
<snip>
Balbir Singh.
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