lkml.org 
[lkml]   [2020]   [Mar]   [19]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: [PATCH 41/70] x86/sev-es: Add Runtime #VC Exception Handler
On Thu, Mar 19, 2020 at 11:43:20AM -0700, Andy Lutomirski wrote:
> Or future generations could have enough hardware support for debugging
> that #DB doesn't need to be intercepted or can be re-injected
> correctly with the #DB vector.

Yeah, the problem is, the GHCB spec suggests the single-step-over-iret
way to re-enable the NMI window and requires intercepting #DB for it. So
the hypervisor probably still has to intercept it, even when debug
support is added some day. I need to think more about this.

Regards,

Joerg

\
 
 \ /
  Last update: 2020-03-19 20:39    [W:0.915 / U:0.520 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site