lkml.org 
[lkml]   [2020]   [Feb]   [12]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: [PATCH 35/62] x86/sev-es: Setup per-cpu GHCBs for the runtime handler
On Tue, Feb 11, 2020 at 02:46:11PM -0800, Andy Lutomirski wrote:
> On Tue, Feb 11, 2020 at 5:53 AM Joerg Roedel <joro@8bytes.org> wrote:
> > +/* Runtime GHCBs */
> > +static DEFINE_PER_CPU_DECRYPTED(struct ghcb, ghcb_page) __aligned(PAGE_SIZE);
>
> Hmm. This is a largeish amount of memory on large non-SEV-ES systems.
> Maybe store a pointer instead? It would be even better if it could be
> DEFINE_PER_CPU like this but be discarded if we don't need it, but I
> don't think we have the infrastructure for that.

Yeah, discarding is not easily possible right now, but I changed it to
only store a pointer and allocating the pages only when running as an
SEV-ES guest.

Regards,

Joerg

\
 
 \ /
  Last update: 2020-02-12 16:16    [W:0.083 / U:0.140 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site