Re: [PATCH 0/2] extend page_track for external usage

[Jike Song <jike.song@intel.com>]

On 10/26/2016 12:42 AM, Neo Jia wrote:
> On Tue, Oct 25, 2016 at 03:50:41PM +0800, Jike Song wrote:
>> page_track is currently used only by KVM internally to protect guest
>> page tables. To be used by external user like KVMGT, the callbacks
>> should carry more information other than KVM/VCPU, and the symbols
>> should be exported.
>>
>> Jike Song (2):
>>   kvm/page_track: call notifiers with kvm_page_track_notifier_node
>>   kvm/page_track: export symbols for external usage
>>
>>  arch/x86/include/asm/kvm_page_track.h | 7 +++++--
>>  arch/x86/kvm/mmu.c                    | 6 ++++--
>>  arch/x86/kvm/page_track.c             | 8 ++++++--
>>  3 files changed, 15 insertions(+), 6 deletions(-)
> 
> Hi Jike,
> 
> What is the plan of providing this functionality to the VFIO based mediated
> vendor driver?
> 
> JFYI, this is a useful feature that NVIDIA vGPU also needs.

Hi Neo,

The page_track implementation is almost ready for external usage, my
changes here are quite trivial. I guess the external user like your
vendor driver can call them directly.

BTW, do you also have to shadow the device page-tables? Per my previous
understanding you don't have to.


--
Thanks,
Jike