Re: [PATCH v10 00/15] x86: Enable Linear Address Space Separation support

Sohil Mehta
2025-10-18T02:55:12Z

On 10/7/2025 9:23 AM, Edgecombe, Rick P wrote:
> There is also an expected harmless UABI change around SIG_SEGV. For a user mode
> kernel address range access, the kernel can deliver a signal that provides the
> exception type and the address. Before it was #PF, now a #GP with no address.
>

That's right. With LASS, the SIG_SEGV will be delivered with without any
address information to userspace. But these are illegal accesses anyway,
so it probably doesn't matter much. I'll include a note in the patch
that updates the #GP handler.

Thanks Rick, for the review tags and general thoughts on the series.

Apart from the minor change in Patch 5 (regarding CR pinning), I have
mainly gathered improvements to the commit message and code comments.

Is there any other feedback?