Re: [Qemu-devel] [PATCH v3 10/20] kvm: arm64: Dynamic configuration of VTTBR mask

[Suzuki K Poulose]

On 07/04/2018 09:24 AM, Auger Eric wrote:
> > > > + *
> > > > + * We have a magic formula for the Magic_N below.
> > > > + *
> > > > + *  Magic_N(PAGE_SIZE, Entry_Level) = 64 - ((PAGE_SHIFT - 3) *
> > > > Number of levels)
> >
> > [0] ^^^
> >
> >
> >
> > > > + *
> > > > + * where number of levels = (4 - Entry_Level).
> >
> > ^^^ Doesn't this help make it clear ? Using the expansion makes it a bit
> > more
> > unreadable below.
>
> I just wanted to mention the tables you refer (D4-23 and D4-25) give
> Magic_N for a larger scope as they deal with any lookup level while we
> only care about the entry level for BADDR. So I was a little bit
> confused when reading the explanation but that's not a big deal.

Ah, ok. I will try to clarify it.

Cheers
Suzuki