From: Linus Torvalds

Sent: 14 October 2024 12:21

On Mon, 14 Oct 2024 at 02:59, David Laight [off-list ref] wrote:

quoted

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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