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SubjectRe: [RFC v5 01/38] powerpc: Free up four 64K PTE bits in 4K backed HPTE pages
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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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