Re: [Xen-devel] [PATCH v2 4/4] x86/HVM: prefill cache with PDPTEs when possible

2018-09-14 Thread Jan Beulich
>>> On 14.09.18 at 04:18, wrote: >> From: Jan Beulich [mailto:jbeul...@suse.com] >> Sent: Thursday, September 13, 2018 4:55 PM >> >> >>> On 13.09.18 at 08:30, wrote: >> >> From: Jan Beulich [mailto:jbeul...@suse.com] >> >> Sent: Tuesday, September 11, 2018 9:16 PM >> >> >> >> Since strictly sp

Re: [Xen-devel] [PATCH v2 4/4] x86/HVM: prefill cache with PDPTEs when possible

2018-09-13 Thread Tian, Kevin
> From: Jan Beulich [mailto:jbeul...@suse.com] > Sent: Thursday, September 13, 2018 4:55 PM > > >>> On 13.09.18 at 08:30, wrote: > >> From: Jan Beulich [mailto:jbeul...@suse.com] > >> Sent: Tuesday, September 11, 2018 9:16 PM > >> > >> Since strictly speaking it is incorrect for guest_walk_table

Re: [Xen-devel] [PATCH v2 4/4] x86/HVM: prefill cache with PDPTEs when possible

2018-09-13 Thread Jan Beulich
>>> On 13.09.18 at 08:30, wrote: >> From: Jan Beulich [mailto:jbeul...@suse.com] >> Sent: Tuesday, September 11, 2018 9:16 PM >> >> Since strictly speaking it is incorrect for guest_walk_tables() to read >> L3 entries during PAE page walks, try to overcome this where possible by > > can you ela

Re: [Xen-devel] [PATCH v2 4/4] x86/HVM: prefill cache with PDPTEs when possible

2018-09-12 Thread Tian, Kevin
> From: Jan Beulich [mailto:jbeul...@suse.com] > Sent: Tuesday, September 11, 2018 9:16 PM > > Since strictly speaking it is incorrect for guest_walk_tables() to read > L3 entries during PAE page walks, try to overcome this where possible by can you elaborate? why it's incorrect to read L3 entrie