Re: [RFC PATCH V6 01/14] x86/sev: Add a #HV exception handler

From: Peter Zijlstra
Date: Tue May 16 2023 - 05:31:01 EST


On Mon, May 15, 2023 at 12:59:03PM -0400, Tianyu Lan wrote:
> From: Tianyu Lan <tiala@xxxxxxxxxxxxx>
>
> Add a #HV exception handler that uses IST stack.
>

Urgh.. that is entirely insufficient. Like it doesn't even begin to
start to cover things.

The whole existing VC IST stack abuse is already a nightmare and you're
duplicating that.. without any explanation for why this would be needed
and how it is correct.

Please try again.