Michael Ellerman writes:
>
> Because 64-bit Book3S uses pgtable-nop4d.h, the P4D is folded into the
> PGD. So P4D entries are actually PGD entries, or vice versa.
>
> The other way to think of it is that the P4D is a single entry page
> table below the PGD. Zero bits of the address are needed to
Christophe Leroy writes:
> Le 03/09/2022 à 14:36, Michael Ellerman a écrit :
>> Because 64-bit Book3S uses pgtable-nop4d.h, the P4D is folded into the
>> PGD. So P4D entries are actually PGD entries, or vice versa.
>>
>> The other way to think of it is that the P4D is a single entry page
>> table
Le 03/09/2022 à 14:36, Michael Ellerman a écrit :
> Because 64-bit Book3S uses pgtable-nop4d.h, the P4D is folded into the
> PGD. So P4D entries are actually PGD entries, or vice versa.
>
> The other way to think of it is that the P4D is a single entry page
> table below the PGD. Zero bits of th
Because 64-bit Book3S uses pgtable-nop4d.h, the P4D is folded into the
PGD. So P4D entries are actually PGD entries, or vice versa.
The other way to think of it is that the P4D is a single entry page
table below the PGD. Zero bits of the address are needed to index into
the P4D, therefore a P4D en
