lkml.org 
[lkml]   [2018]   [Aug]   [7]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
SubjectRe: [PATCH] xen: don't use privcmd_call() from xen_mc_flush()
From
Date
On 07/08/18 16:02, Boris Ostrovsky wrote:
> On 08/07/2018 09:11 AM, Juergen Gross wrote:
>> On 13/06/18 11:58, Juergen Gross wrote:
>>> Using privcmd_call() for a singleton multicall seems to be wrong, as
>>> privcmd_call() is using stac()/clac() to enable hypervisor access to
>>> Linux user space.
>>>
>>> Add a new xen_single_call() function to be use for that purpose.
>>>
>>> Reported-by: Jan Beulich <jbeulich@suse.com>
>>> Signed-off-by: Juergen Gross <jgross@suse.com>
>> Boris, any objections?
>
>
> I think Jan wanted a change in commit message. I can commit with this:
>
> "Using privcmd_call() for a singleton multicall seems to be wrong, as
> privcmd_call() is using stac()/clac() to enable hypervisor access to
> Linux user space.
>
> Even if currently not a problem (pv domains can't use SMAP while HVM
> and PVH domains can't use multicalls) things might change when
> PVH dom0 support is added to the kernel."

This would be fine, thanks.


Juergen

\
 
 \ /
  Last update: 2018-08-07 17:18    [W:0.029 / U:2.304 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site