lkml.org 
[lkml]   [2019]   [Dec]   [17]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
From
SubjectRE: [PATCH RFC 04/15] KVM: Implement ring-based dirty memory tracking
Date
> From: Paolo Bonzini <pbonzini@redhat.com>
> Sent: Wednesday, December 18, 2019 12:31 AM
>
> On 17/12/19 17:18, Alex Williamson wrote:
> >>
> >> Alex, if you are OK we'll work on such interface and move kvmgt to use it.
> >> After it's accepted, we can also mark pages dirty through this new
> interface
> >> in Kirti's dirty page tracking series.
> > I'm not sure what you're asking for, is it an interface for the host
> > CPU to read/write the memory backing of a mapped IOVA range without
> > pinning pages? That seems like something like that would make sense for
> > an emulation model where a page does not need to be pinned for physical
> > DMA. If you're asking more for an interface that understands the
> > userspace driver is a VM (ie. implied using a _guest postfix on the
> > function name) and knows about GPA mappings beyond the windows
> directly
> > mapped for device access, I'd not look fondly on such a request.
>
> No, it would definitely be the former, using IOVAs to access guest
> memory---kvmgt is currently doing the latter by calling into KVM, and
> I'm not really fond of that either.
>

Exactly. let's work on the fix.

Thanks
Kevin
\
 
 \ /
  Last update: 2019-12-18 01:30    [W:0.094 / U:5.728 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site