Re: [PATCH 0/3] x86: Extend LASS support to EFI configurations

From: Sohil Mehta

Date: Fri Dec 12 2025 - 19:21:12 EST


On 12/4/2025 11:58 AM, Ard Biesheuvel wrote:
> On Thu, 4 Dec 2025 at 20:51, H. Peter Anvin <hpa@xxxxxxxxx> wrote:
>>
>> But your underlying assumption is that disabling LASS around EFI
>> calls is a problem. It isn't, because the efi_mm has explicitly
>> unmapped any memory EFI isn't allowed to touch. In other words, we
>> are already doing the equivalent of LASS "manually."
>>
>
> I must have misunderstood then - there was some pushback on this
> IIRC but if en/disabling LASS is fine then sure.
Thanks for the feedback! I'll leave the patches as-is then and wait for
additional comments.