From: Linus Torvalds
> Sent: 14 October 2024 12:21
>
> On Mon, 14 Oct 2024 at 02:59, David Laight <david.lai...@aculab.com> wrote:
> >
> > Isn't LAM just plain stupid unless the hardware validates the bits
> > against the TLB?
>
> What? No. You can't do that. At some point, the TLB isn't filled, and
> then you have to do the access with lots of linear address bits
> masked.
And the 'high' bits get reloaded from the PTE.
(Although I suspect there isn't space for them.)
Reloading the high bits from the VA that caused the fault would
be 'interesting' - certainly better than just ignoring them.
David
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