Re: [PATCH v1 1/1] x86/fred: Fix int80 emulation for FRED

From: H. Peter Anvin
Date: Tue Apr 16 2024 - 14:12:21 EST


On 4/16/24 11:07, Borislav Petkov wrote:
On Tue, Apr 16, 2024 at 11:05:09AM -0700, H. Peter Anvin wrote:
The question was if you wanted a quick fix for x86/urgent. It's pretty
obvious that a FRED fork of the int80 code is called for.

Yeah, I'm thinking the FRED fork would be even easier to send to Linus
now since no existing hw will break.

Looking at the resulting code (Xin's v2 path), I would agree with you. The code is downright trivial.

Btw, I presume that patch needs to have

Fixes: 55617fb991df ("x86/entry: Do not allow external 0x80 interrupts")


Yes. My fault, I gave Xin incorrect information w.r.t. Fixes: tags.

-hpa